1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* New redisplay written by Gerd Moellmann <gerd@gnu.org>.
26 Emacs separates the task of updating the display from code
27 modifying global state, e.g. buffer text. This way functions
28 operating on buffers don't also have to be concerned with updating
31 Updating the display is triggered by the Lisp interpreter when it
32 decides it's time to do it. This is done either automatically for
33 you as part of the interpreter's command loop or as the result of
34 calling Lisp functions like `sit-for'. The C function `redisplay'
35 in xdisp.c is the only entry into the inner redisplay code. (Or,
36 let's say almost---see the the description of direct update
39 The following diagram shows how redisplay code is invoked. As you
40 can see, Lisp calls redisplay and vice versa. Under window systems
41 like X, some portions of the redisplay code are also called
42 asynchronously during mouse movement or expose events. It is very
43 important that these code parts do NOT use the C library (malloc,
44 free) because many C libraries under Unix are not reentrant. They
45 may also NOT call functions of the Lisp interpreter which could
46 change the interpreter's state. If you don't follow these rules,
47 you will encounter bugs which are very hard to explain.
49 (Direct functions, see below)
50 direct_output_for_insert,
51 direct_forward_char (dispnew.c)
52 +---------------------------------+
55 +--------------+ redisplay() +----------------+
56 | Lisp machine |---------------->| Redisplay code |<--+
57 +--------------+ (xdisp.c) +----------------+ |
59 +----------------------------------+ |
60 Don't use this path when called |
63 expose_window (asynchronous) |
65 X expose events -----+
67 What does redisplay? Obviously, it has to figure out somehow what
68 has been changed since the last time the display has been updated,
69 and to make these changes visible. Preferably it would do that in
70 a moderately intelligent way, i.e. fast.
72 Changes in buffer text can be deduced from window and buffer
73 structures, and from some global variables like `beg_unchanged' and
74 `end_unchanged'. The contents of the display are additionally
75 recorded in a `glyph matrix', a two-dimensional matrix of glyph
76 structures. Each row in such a matrix corresponds to a line on the
77 display, and each glyph in a row corresponds to a column displaying
78 a character, an image, or what else. This matrix is called the
79 `current glyph matrix' or `current matrix' in redisplay
82 For buffer parts that have been changed since the last update, a
83 second glyph matrix is constructed, the so called `desired glyph
84 matrix' or short `desired matrix'. Current and desired matrix are
85 then compared to find a cheap way to update the display, e.g. by
86 reusing part of the display by scrolling lines.
91 You will find a lot of of redisplay optimizations when you start
92 looking at the innards of redisplay. The overall goal of all these
93 optimizations is to make redisplay fast because it is done
96 Two optimizations are not found in xdisp.c. These are the direct
97 operations mentioned above. As the name suggests they follow a
98 different principle than the rest of redisplay. Instead of
99 building a desired matrix and then comparing it with the current
100 display, they perform their actions directly on the display and on
103 One direct operation updates the display after one character has
104 been entered. The other one moves the cursor by one position
105 forward or backward. You find these functions under the names
106 `direct_output_for_insert' and `direct_output_forward_char' in
112 Desired matrices are always built per Emacs window. The function
113 `display_line' is the central function to look at if you are
114 interested. It constructs one row in a desired matrix given an
115 iterator structure containing both a buffer position and a
116 description of the environment in which the text is to be
117 displayed. But this is too early, read on.
119 Characters and pixmaps displayed for a range of buffer text depend
120 on various settings of buffers and windows, on overlays and text
121 properties, on display tables, on selective display. The good news
122 is that all this hairy stuff is hidden behind a small set of
123 interface functions taking a iterator structure (struct it)
126 Iteration over things to be be displayed is then simple. It is
127 started by initializing an iterator with a call to init_iterator
128 (or init_string_iterator for that matter). Calls to
129 get_next_display_element fill the iterator structure with relevant
130 information about the next thing to display. Calls to
131 set_iterator_to_next move the iterator to the next thing.
133 Besides this, an iterator also contains information about the
134 display environment in which glyphs for display elements are to be
135 produced. It has fields for the width and height of the display,
136 the information whether long lines are truncated or continued, a
137 current X and Y position, and lots of other stuff you can better
140 Glyphs in a desired matrix are normally constructed in a loop
141 calling get_next_display_element and then produce_glyphs. The call
142 to produce_glyphs will fill the iterator structure with pixel
143 information about the element being displayed and at the same time
144 produce glyphs for it. If the display element fits on the line
145 being displayed, set_iterator_to_next is called next, otherwise the
146 glyphs produced are discarded.
151 That just couldn't be all, could it? What about terminal types not
152 supporting operations on sub-windows of the screen? To update the
153 display on such a terminal, window-based glyph matrices are not
154 well suited. To be able to reuse part of the display (scrolling
155 lines up and down), we must instead have a view of the whole
156 screen. This is what `frame matrices' are for. They are a trick.
158 Frames on terminals like above have a glyph pool. Windows on such
159 a frame sub-allocate their glyph memory from their frame's glyph
160 pool. The frame itself is given its own glyph matrices. By
161 coincidence---or maybe something else---rows in window glyph
162 matrices are slices of corresponding rows in frame matrices. Thus
163 writing to window matrices implicitly updates a frame matrix which
164 provides us with the view of the whole screen that we originally
165 wanted to have without having to move many bytes around. To be
166 honest, there is a little bit more done, but not much more. If you
167 plan to extend that code, take a look at dispnew.c. The function
168 build_frame_matrix is a good starting point. */
173 #include "keyboard.h"
176 #include "termchar.h"
177 #include "dispextern.h"
181 #include "commands.h"
184 #include "termhooks.h"
185 #include "intervals.h"
188 #include "region-cache.h"
191 #ifdef HAVE_X_WINDOWS
201 #define min(a, b) ((a) < (b) ? (a) : (b))
202 #define max(a, b) ((a) > (b) ? (a) : (b))
204 #define INFINITY 10000000
206 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh)
207 extern void set_frame_menubar
P_ ((struct frame
*f
, int, int));
208 extern int pending_menu_activation
;
211 extern int interrupt_input
;
212 extern int command_loop_level
;
214 extern int minibuffer_auto_raise
;
216 extern Lisp_Object Qface
;
218 extern Lisp_Object Voverriding_local_map
;
219 extern Lisp_Object Voverriding_local_map_menu_flag
;
220 extern Lisp_Object Qmenu_item
;
222 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
223 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
224 Lisp_Object Qredisplay_end_trigger_functions
;
225 Lisp_Object Qinhibit_point_motion_hooks
;
226 Lisp_Object QCeval
, Qwhen
, QCfile
, QCdata
;
227 Lisp_Object Qfontified
;
228 Lisp_Object Qgrow_only
;
230 /* Functions called to fontify regions of text. */
232 Lisp_Object Vfontification_functions
;
233 Lisp_Object Qfontification_functions
;
235 /* Non-zero means draw tool bar buttons raised when the mouse moves
238 int auto_raise_tool_bar_buttons_p
;
240 /* Margin around tool bar buttons in pixels. */
242 Lisp_Object Vtool_bar_button_margin
;
244 /* Thickness of shadow to draw around tool bar buttons. */
246 int tool_bar_button_relief
;
248 /* Non-zero means automatically resize tool-bars so that all tool-bar
249 items are visible, and no blank lines remain. */
251 int auto_resize_tool_bars_p
;
253 /* Non-nil means don't actually do any redisplay. */
255 Lisp_Object Vinhibit_redisplay
, Qinhibit_redisplay
;
257 /* Names of text properties relevant for redisplay. */
259 Lisp_Object Qdisplay
, Qrelative_width
, Qalign_to
;
260 extern Lisp_Object Qface
, Qinvisible
, Qimage
, Qwidth
;
262 /* Symbols used in text property values. */
264 Lisp_Object Qspace
, QCalign_to
, QCrelative_width
, QCrelative_height
;
265 Lisp_Object Qleft_margin
, Qright_margin
, Qspace_width
, Qraise
;
267 extern Lisp_Object Qheight
;
269 /* Non-nil means highlight trailing whitespace. */
271 Lisp_Object Vshow_trailing_whitespace
;
273 /* Name of the face used to highlight trailing whitespace. */
275 Lisp_Object Qtrailing_whitespace
;
277 /* The symbol `image' which is the car of the lists used to represent
282 /* Non-zero means print newline to stdout before next mini-buffer
285 int noninteractive_need_newline
;
287 /* Non-zero means print newline to message log before next message. */
289 static int message_log_need_newline
;
292 /* The buffer position of the first character appearing entirely or
293 partially on the line of the selected window which contains the
294 cursor; <= 0 if not known. Set by set_cursor_from_row, used for
295 redisplay optimization in redisplay_internal. */
297 static struct text_pos this_line_start_pos
;
299 /* Number of characters past the end of the line above, including the
300 terminating newline. */
302 static struct text_pos this_line_end_pos
;
304 /* The vertical positions and the height of this line. */
306 static int this_line_vpos
;
307 static int this_line_y
;
308 static int this_line_pixel_height
;
310 /* X position at which this display line starts. Usually zero;
311 negative if first character is partially visible. */
313 static int this_line_start_x
;
315 /* Buffer that this_line_.* variables are referring to. */
317 static struct buffer
*this_line_buffer
;
319 /* Nonzero means truncate lines in all windows less wide than the
322 int truncate_partial_width_windows
;
324 /* A flag to control how to display unibyte 8-bit character. */
326 int unibyte_display_via_language_environment
;
328 /* Nonzero means we have more than one non-mini-buffer-only frame.
329 Not guaranteed to be accurate except while parsing
330 frame-title-format. */
334 Lisp_Object Vglobal_mode_string
;
336 /* Marker for where to display an arrow on top of the buffer text. */
338 Lisp_Object Voverlay_arrow_position
;
340 /* String to display for the arrow. Only used on terminal frames. */
342 Lisp_Object Voverlay_arrow_string
;
344 /* Values of those variables at last redisplay. However, if
345 Voverlay_arrow_position is a marker, last_arrow_position is its
346 numerical position. */
348 static Lisp_Object last_arrow_position
, last_arrow_string
;
350 /* Like mode-line-format, but for the title bar on a visible frame. */
352 Lisp_Object Vframe_title_format
;
354 /* Like mode-line-format, but for the title bar on an iconified frame. */
356 Lisp_Object Vicon_title_format
;
358 /* List of functions to call when a window's size changes. These
359 functions get one arg, a frame on which one or more windows' sizes
362 static Lisp_Object Vwindow_size_change_functions
;
364 Lisp_Object Qmenu_bar_update_hook
, Vmenu_bar_update_hook
;
366 /* Nonzero if overlay arrow has been displayed once in this window. */
368 static int overlay_arrow_seen
;
370 /* Nonzero means highlight the region even in nonselected windows. */
372 int highlight_nonselected_windows
;
374 /* If cursor motion alone moves point off frame, try scrolling this
375 many lines up or down if that will bring it back. */
377 static int scroll_step
;
379 /* Non-0 means scroll just far enough to bring point back on the
380 screen, when appropriate. */
382 static int scroll_conservatively
;
384 /* Recenter the window whenever point gets within this many lines of
385 the top or bottom of the window. This value is translated into a
386 pixel value by multiplying it with CANON_Y_UNIT, which means that
387 there is really a fixed pixel height scroll margin. */
391 /* Number of windows showing the buffer of the selected window (or
392 another buffer with the same base buffer). keyboard.c refers to
397 /* Vector containing glyphs for an ellipsis `...'. */
399 static Lisp_Object default_invis_vector
[3];
401 /* Zero means display the mode-line/header-line/menu-bar in the default face
402 (this slightly odd definition is for compatibility with previous versions
403 of emacs), non-zero means display them using their respective faces.
405 This variable is deprecated. */
407 int mode_line_inverse_video
;
409 /* Prompt to display in front of the mini-buffer contents. */
411 Lisp_Object minibuf_prompt
;
413 /* Width of current mini-buffer prompt. Only set after display_line
414 of the line that contains the prompt. */
416 int minibuf_prompt_width
;
417 int minibuf_prompt_pixel_width
;
419 /* This is the window where the echo area message was displayed. It
420 is always a mini-buffer window, but it may not be the same window
421 currently active as a mini-buffer. */
423 Lisp_Object echo_area_window
;
425 /* List of pairs (MESSAGE . MULTIBYTE). The function save_message
426 pushes the current message and the value of
427 message_enable_multibyte on the stack, the function restore_message
428 pops the stack and displays MESSAGE again. */
430 Lisp_Object Vmessage_stack
;
432 /* Nonzero means multibyte characters were enabled when the echo area
433 message was specified. */
435 int message_enable_multibyte
;
437 /* True if we should redraw the mode lines on the next redisplay. */
439 int update_mode_lines
;
441 /* Nonzero if window sizes or contents have changed since last
442 redisplay that finished */
444 int windows_or_buffers_changed
;
446 /* Nonzero after display_mode_line if %l was used and it displayed a
449 int line_number_displayed
;
451 /* Maximum buffer size for which to display line numbers. */
453 Lisp_Object Vline_number_display_limit
;
455 /* line width to consider when repostioning for line number display */
457 static int line_number_display_limit_width
;
459 /* Number of lines to keep in the message log buffer. t means
460 infinite. nil means don't log at all. */
462 Lisp_Object Vmessage_log_max
;
464 /* The name of the *Messages* buffer, a string. */
466 static Lisp_Object Vmessages_buffer_name
;
468 /* Current, index 0, and last displayed echo area message. Either
469 buffers from echo_buffers, or nil to indicate no message. */
471 Lisp_Object echo_area_buffer
[2];
473 /* The buffers referenced from echo_area_buffer. */
475 static Lisp_Object echo_buffer
[2];
477 /* A vector saved used in with_area_buffer to reduce consing. */
479 static Lisp_Object Vwith_echo_area_save_vector
;
481 /* Non-zero means display_echo_area should display the last echo area
482 message again. Set by redisplay_preserve_echo_area. */
484 static int display_last_displayed_message_p
;
486 /* Nonzero if echo area is being used by print; zero if being used by
489 int message_buf_print
;
491 /* Maximum height for resizing mini-windows. Either a float
492 specifying a fraction of the available height, or an integer
493 specifying a number of lines. */
495 Lisp_Object Vmax_mini_window_height
;
497 /* Non-zero means messages should be displayed with truncated
498 lines instead of being continued. */
500 int message_truncate_lines
;
501 Lisp_Object Qmessage_truncate_lines
;
503 /* Non-zero means we want a hollow cursor in windows that are not
504 selected. Zero means there's no cursor in such windows. */
506 int cursor_in_non_selected_windows
;
508 /* A scratch glyph row with contents used for generating truncation
509 glyphs. Also used in direct_output_for_insert. */
511 #define MAX_SCRATCH_GLYPHS 100
512 struct glyph_row scratch_glyph_row
;
513 static struct glyph scratch_glyphs
[MAX_SCRATCH_GLYPHS
];
515 /* Ascent and height of the last line processed by move_it_to. */
517 static int last_max_ascent
, last_height
;
519 /* Non-zero if there's a help-echo in the echo area. */
521 int help_echo_showing_p
;
523 /* If >= 0, computed, exact values of mode-line and header-line height
524 to use in the macros CURRENT_MODE_LINE_HEIGHT and
525 CURRENT_HEADER_LINE_HEIGHT. */
527 int current_mode_line_height
, current_header_line_height
;
529 /* The maximum distance to look ahead for text properties. Values
530 that are too small let us call compute_char_face and similar
531 functions too often which is expensive. Values that are too large
532 let us call compute_char_face and alike too often because we
533 might not be interested in text properties that far away. */
535 #define TEXT_PROP_DISTANCE_LIMIT 100
539 /* Non-zero means print traces of redisplay if compiled with
542 int trace_redisplay_p
;
544 #endif /* GLYPH_DEBUG */
546 #ifdef DEBUG_TRACE_MOVE
547 /* Non-zero means trace with TRACE_MOVE to stderr. */
550 #define TRACE_MOVE(x) if (trace_move) fprintf x; else (void) 0
552 #define TRACE_MOVE(x) (void) 0
555 /* Non-zero means automatically scroll windows horizontally to make
558 int automatic_hscrolling_p
;
560 /* A list of symbols, one for each supported image type. */
562 Lisp_Object Vimage_types
;
564 /* The variable `resize-mini-windows'. If nil, don't resize
565 mini-windows. If t, always resize them to fit the text they
566 display. If `grow-only', let mini-windows grow only until they
569 Lisp_Object Vresize_mini_windows
;
571 /* Value returned from text property handlers (see below). */
576 HANDLED_RECOMPUTE_PROPS
,
577 HANDLED_OVERLAY_STRING_CONSUMED
,
581 /* A description of text properties that redisplay is interested
586 /* The name of the property. */
589 /* A unique index for the property. */
592 /* A handler function called to set up iterator IT from the property
593 at IT's current position. Value is used to steer handle_stop. */
594 enum prop_handled (*handler
) P_ ((struct it
*it
));
597 static enum prop_handled handle_face_prop
P_ ((struct it
*));
598 static enum prop_handled handle_invisible_prop
P_ ((struct it
*));
599 static enum prop_handled handle_display_prop
P_ ((struct it
*));
600 static enum prop_handled handle_composition_prop
P_ ((struct it
*));
601 static enum prop_handled handle_overlay_change
P_ ((struct it
*));
602 static enum prop_handled handle_fontified_prop
P_ ((struct it
*));
604 /* Properties handled by iterators. */
606 static struct props it_props
[] =
608 {&Qfontified
, FONTIFIED_PROP_IDX
, handle_fontified_prop
},
609 /* Handle `face' before `display' because some sub-properties of
610 `display' need to know the face. */
611 {&Qface
, FACE_PROP_IDX
, handle_face_prop
},
612 {&Qdisplay
, DISPLAY_PROP_IDX
, handle_display_prop
},
613 {&Qinvisible
, INVISIBLE_PROP_IDX
, handle_invisible_prop
},
614 {&Qcomposition
, COMPOSITION_PROP_IDX
, handle_composition_prop
},
618 /* Value is the position described by X. If X is a marker, value is
619 the marker_position of X. Otherwise, value is X. */
621 #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X))
623 /* Enumeration returned by some move_it_.* functions internally. */
627 /* Not used. Undefined value. */
630 /* Move ended at the requested buffer position or ZV. */
631 MOVE_POS_MATCH_OR_ZV
,
633 /* Move ended at the requested X pixel position. */
636 /* Move within a line ended at the end of a line that must be
640 /* Move within a line ended at the end of a line that would
641 be displayed truncated. */
644 /* Move within a line ended at a line end. */
650 /* Function prototypes. */
652 static int cursor_row_p
P_ ((struct window
*, struct glyph_row
*));
653 static int redisplay_mode_lines
P_ ((Lisp_Object
, int));
654 static char *decode_mode_spec_coding
P_ ((Lisp_Object
, char *, int));
655 static int invisible_text_between_p
P_ ((struct it
*, int, int));
656 static int next_element_from_ellipsis
P_ ((struct it
*));
657 static void pint2str
P_ ((char *, int, int));
658 static struct text_pos run_window_scroll_functions
P_ ((Lisp_Object
,
660 static void reconsider_clip_changes
P_ ((struct window
*, struct buffer
*));
661 static int text_outside_line_unchanged_p
P_ ((struct window
*, int, int));
662 static void store_frame_title_char
P_ ((char));
663 static int store_frame_title
P_ ((unsigned char *, int, int));
664 static void x_consider_frame_title
P_ ((Lisp_Object
));
665 static void handle_stop
P_ ((struct it
*));
666 static int tool_bar_lines_needed
P_ ((struct frame
*));
667 static int single_display_prop_intangible_p
P_ ((Lisp_Object
));
668 static void ensure_echo_area_buffers
P_ ((void));
669 static struct glyph_row
*row_containing_pos
P_ ((struct window
*, int,
671 struct glyph_row
*));
672 static Lisp_Object unwind_with_echo_area_buffer
P_ ((Lisp_Object
));
673 static Lisp_Object with_echo_area_buffer_unwind_data
P_ ((struct window
*));
674 static int with_echo_area_buffer
P_ ((struct window
*, int,
675 int (*) (EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
),
676 EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
677 static void clear_garbaged_frames
P_ ((void));
678 static int current_message_1
P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
679 static int truncate_message_1
P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
680 static int set_message_1
P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
681 static int display_echo_area
P_ ((struct window
*));
682 static int display_echo_area_1
P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
683 static int resize_mini_window_1
P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
684 static Lisp_Object unwind_redisplay
P_ ((Lisp_Object
));
685 static int string_char_and_length
P_ ((unsigned char *, int, int *));
686 static struct text_pos display_prop_end
P_ ((struct it
*, Lisp_Object
,
688 static int compute_window_start_on_continuation_line
P_ ((struct window
*));
689 static Lisp_Object safe_eval_handler
P_ ((Lisp_Object
));
690 static void insert_left_trunc_glyphs
P_ ((struct it
*));
691 static struct glyph_row
*get_overlay_arrow_glyph_row
P_ ((struct window
*));
692 static void extend_face_to_end_of_line
P_ ((struct it
*));
693 static int append_space
P_ ((struct it
*, int));
694 static void make_cursor_line_fully_visible
P_ ((struct window
*));
695 static int try_scrolling
P_ ((Lisp_Object
, int, int, int, int));
696 static int try_cursor_movement
P_ ((Lisp_Object
, struct text_pos
, int *));
697 static int trailing_whitespace_p
P_ ((int));
698 static int message_log_check_duplicate
P_ ((int, int, int, int));
699 int invisible_p
P_ ((Lisp_Object
, Lisp_Object
));
700 int invisible_ellipsis_p
P_ ((Lisp_Object
, Lisp_Object
));
701 static void push_it
P_ ((struct it
*));
702 static void pop_it
P_ ((struct it
*));
703 static void sync_frame_with_window_matrix_rows
P_ ((struct window
*));
704 static void redisplay_internal
P_ ((int));
705 static int echo_area_display
P_ ((int));
706 static void redisplay_windows
P_ ((Lisp_Object
));
707 static void redisplay_window
P_ ((Lisp_Object
, int));
708 static void update_menu_bar
P_ ((struct frame
*, int));
709 static int try_window_reusing_current_matrix
P_ ((struct window
*));
710 static int try_window_id
P_ ((struct window
*));
711 static int display_line
P_ ((struct it
*));
712 static int display_mode_lines
P_ ((struct window
*));
713 static int display_mode_line
P_ ((struct window
*, enum face_id
, Lisp_Object
));
714 static int display_mode_element
P_ ((struct it
*, int, int, int, Lisp_Object
));
715 static char *decode_mode_spec
P_ ((struct window
*, int, int, int));
716 static void display_menu_bar
P_ ((struct window
*));
717 static int display_count_lines
P_ ((int, int, int, int, int *));
718 static int display_string
P_ ((unsigned char *, Lisp_Object
, Lisp_Object
,
719 int, int, struct it
*, int, int, int, int));
720 static void compute_line_metrics
P_ ((struct it
*));
721 static void run_redisplay_end_trigger_hook
P_ ((struct it
*));
722 static int get_overlay_strings
P_ ((struct it
*));
723 static void next_overlay_string
P_ ((struct it
*));
724 static void reseat
P_ ((struct it
*, struct text_pos
, int));
725 static void reseat_1
P_ ((struct it
*, struct text_pos
, int));
726 static void back_to_previous_visible_line_start
P_ ((struct it
*));
727 static void reseat_at_previous_visible_line_start
P_ ((struct it
*));
728 static void reseat_at_next_visible_line_start
P_ ((struct it
*, int));
729 static int next_element_from_display_vector
P_ ((struct it
*));
730 static int next_element_from_string
P_ ((struct it
*));
731 static int next_element_from_c_string
P_ ((struct it
*));
732 static int next_element_from_buffer
P_ ((struct it
*));
733 static int next_element_from_composition
P_ ((struct it
*));
734 static int next_element_from_image
P_ ((struct it
*));
735 static int next_element_from_stretch
P_ ((struct it
*));
736 static void load_overlay_strings
P_ ((struct it
*));
737 static void init_from_display_pos
P_ ((struct it
*, struct window
*,
738 struct display_pos
*));
739 static void reseat_to_string
P_ ((struct it
*, unsigned char *,
740 Lisp_Object
, int, int, int, int));
741 static enum move_it_result move_it_in_display_line_to
P_ ((struct it
*,
743 void move_it_vertically_backward
P_ ((struct it
*, int));
744 static void init_to_row_start
P_ ((struct it
*, struct window
*,
745 struct glyph_row
*));
746 static void init_to_row_end
P_ ((struct it
*, struct window
*,
747 struct glyph_row
*));
748 static void back_to_previous_line_start
P_ ((struct it
*));
749 static int forward_to_next_line_start
P_ ((struct it
*, int *));
750 static struct text_pos string_pos_nchars_ahead
P_ ((struct text_pos
,
752 static struct text_pos string_pos
P_ ((int, Lisp_Object
));
753 static struct text_pos c_string_pos
P_ ((int, unsigned char *, int));
754 static int number_of_chars
P_ ((unsigned char *, int));
755 static void compute_stop_pos
P_ ((struct it
*));
756 static void compute_string_pos
P_ ((struct text_pos
*, struct text_pos
,
758 static int face_before_or_after_it_pos
P_ ((struct it
*, int));
759 static int next_overlay_change
P_ ((int));
760 static int handle_single_display_prop
P_ ((struct it
*, Lisp_Object
,
761 Lisp_Object
, struct text_pos
*));
762 static int underlying_face_id
P_ ((struct it
*));
764 #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1)
765 #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0)
767 #ifdef HAVE_WINDOW_SYSTEM
769 static void update_tool_bar
P_ ((struct frame
*, int));
770 static void build_desired_tool_bar_string
P_ ((struct frame
*f
));
771 static int redisplay_tool_bar
P_ ((struct frame
*));
772 static void display_tool_bar_line
P_ ((struct it
*));
774 #endif /* HAVE_WINDOW_SYSTEM */
777 /***********************************************************************
778 Window display dimensions
779 ***********************************************************************/
781 /* Return the window-relative maximum y + 1 for glyph rows displaying
782 text in window W. This is the height of W minus the height of a
783 mode line, if any. */
786 window_text_bottom_y (w
)
789 struct frame
*f
= XFRAME (w
->frame
);
790 int height
= XFASTINT (w
->height
) * CANON_Y_UNIT (f
);
792 if (WINDOW_WANTS_MODELINE_P (w
))
793 height
-= CURRENT_MODE_LINE_HEIGHT (w
);
798 /* Return the pixel width of display area AREA of window W. AREA < 0
799 means return the total width of W, not including bitmap areas to
800 the left and right of the window. */
803 window_box_width (w
, area
)
807 struct frame
*f
= XFRAME (w
->frame
);
808 int width
= XFASTINT (w
->width
);
810 if (!w
->pseudo_window_p
)
812 width
-= FRAME_SCROLL_BAR_WIDTH (f
) + FRAME_FLAGS_AREA_COLS (f
);
814 if (area
== TEXT_AREA
)
816 if (INTEGERP (w
->left_margin_width
))
817 width
-= XFASTINT (w
->left_margin_width
);
818 if (INTEGERP (w
->right_margin_width
))
819 width
-= XFASTINT (w
->right_margin_width
);
821 else if (area
== LEFT_MARGIN_AREA
)
822 width
= (INTEGERP (w
->left_margin_width
)
823 ? XFASTINT (w
->left_margin_width
) : 0);
824 else if (area
== RIGHT_MARGIN_AREA
)
825 width
= (INTEGERP (w
->right_margin_width
)
826 ? XFASTINT (w
->right_margin_width
) : 0);
829 return width
* CANON_X_UNIT (f
);
833 /* Return the pixel height of the display area of window W, not
834 including mode lines of W, if any.. */
837 window_box_height (w
)
840 struct frame
*f
= XFRAME (w
->frame
);
841 int height
= XFASTINT (w
->height
) * CANON_Y_UNIT (f
);
843 xassert (height
>= 0);
845 /* Note: the code below that determines the mode-line/header-line
846 height is essentially the same as that contained in the macro
847 CURRENT_{MODE,HEADER}_LINE_HEIGHT, except that it checks whether
848 the appropriate glyph row has its `mode_line_p' flag set,
849 and if it doesn't, uses estimate_mode_line_height instead. */
851 if (WINDOW_WANTS_MODELINE_P (w
))
853 struct glyph_row
*ml_row
854 = (w
->current_matrix
&& w
->current_matrix
->rows
855 ? MATRIX_MODE_LINE_ROW (w
->current_matrix
)
857 if (ml_row
&& ml_row
->mode_line_p
)
858 height
-= ml_row
->height
;
860 height
-= estimate_mode_line_height (f
, MODE_LINE_FACE_ID
);
863 if (WINDOW_WANTS_HEADER_LINE_P (w
))
865 struct glyph_row
*hl_row
866 = (w
->current_matrix
&& w
->current_matrix
->rows
867 ? MATRIX_HEADER_LINE_ROW (w
->current_matrix
)
869 if (hl_row
&& hl_row
->mode_line_p
)
870 height
-= hl_row
->height
;
872 height
-= estimate_mode_line_height (f
, HEADER_LINE_FACE_ID
);
879 /* Return the frame-relative coordinate of the left edge of display
880 area AREA of window W. AREA < 0 means return the left edge of the
881 whole window, to the right of any bitmap area at the left side of
885 window_box_left (w
, area
)
889 struct frame
*f
= XFRAME (w
->frame
);
890 int x
= FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
);
892 if (!w
->pseudo_window_p
)
894 x
+= (WINDOW_LEFT_MARGIN (w
) * CANON_X_UNIT (f
)
895 + FRAME_LEFT_FLAGS_AREA_WIDTH (f
));
897 if (area
== TEXT_AREA
)
898 x
+= window_box_width (w
, LEFT_MARGIN_AREA
);
899 else if (area
== RIGHT_MARGIN_AREA
)
900 x
+= (window_box_width (w
, LEFT_MARGIN_AREA
)
901 + window_box_width (w
, TEXT_AREA
));
908 /* Return the frame-relative coordinate of the right edge of display
909 area AREA of window W. AREA < 0 means return the left edge of the
910 whole window, to the left of any bitmap area at the right side of
914 window_box_right (w
, area
)
918 return window_box_left (w
, area
) + window_box_width (w
, area
);
922 /* Get the bounding box of the display area AREA of window W, without
923 mode lines, in frame-relative coordinates. AREA < 0 means the
924 whole window, not including bitmap areas to the left and right of
925 the window. Return in *BOX_X and *BOX_Y the frame-relative pixel
926 coordinates of the upper-left corner of the box. Return in
927 *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */
930 window_box (w
, area
, box_x
, box_y
, box_width
, box_height
)
933 int *box_x
, *box_y
, *box_width
, *box_height
;
935 struct frame
*f
= XFRAME (w
->frame
);
937 *box_width
= window_box_width (w
, area
);
938 *box_height
= window_box_height (w
);
939 *box_x
= window_box_left (w
, area
);
940 *box_y
= (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
)
941 + XFASTINT (w
->top
) * CANON_Y_UNIT (f
));
942 if (WINDOW_WANTS_HEADER_LINE_P (w
))
943 *box_y
+= CURRENT_HEADER_LINE_HEIGHT (w
);
947 /* Get the bounding box of the display area AREA of window W, without
948 mode lines. AREA < 0 means the whole window, not including bitmap
949 areas to the left and right of the window. Return in *TOP_LEFT_X
950 and TOP_LEFT_Y the frame-relative pixel coordinates of the
951 upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and
952 *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the
956 window_box_edges (w
, area
, top_left_x
, top_left_y
,
957 bottom_right_x
, bottom_right_y
)
960 int *top_left_x
, *top_left_y
, *bottom_right_x
, *bottom_right_y
;
962 window_box (w
, area
, top_left_x
, top_left_y
, bottom_right_x
,
964 *bottom_right_x
+= *top_left_x
;
965 *bottom_right_y
+= *top_left_y
;
970 /***********************************************************************
972 ***********************************************************************/
974 /* Return 1 if position CHARPOS is visible in window W. Set *FULLY to
975 1 if POS is visible and the line containing POS is fully visible.
976 EXACT_MODE_LINE_HEIGHTS_P non-zero means compute exact mode-line
977 and header-lines heights. */
980 pos_visible_p (w
, charpos
, fully
, exact_mode_line_heights_p
)
982 int charpos
, *fully
, exact_mode_line_heights_p
;
987 struct buffer
*old_buffer
= NULL
;
989 if (XBUFFER (w
->buffer
) != current_buffer
)
991 old_buffer
= current_buffer
;
992 set_buffer_internal_1 (XBUFFER (w
->buffer
));
995 *fully
= visible_p
= 0;
996 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
998 /* Compute exact mode line heights, if requested. */
999 if (exact_mode_line_heights_p
)
1001 if (WINDOW_WANTS_MODELINE_P (w
))
1002 current_mode_line_height
1003 = display_mode_line (w
, MODE_LINE_FACE_ID
,
1004 current_buffer
->mode_line_format
);
1006 if (WINDOW_WANTS_HEADER_LINE_P (w
))
1007 current_header_line_height
1008 = display_mode_line (w
, HEADER_LINE_FACE_ID
,
1009 current_buffer
->header_line_format
);
1012 start_display (&it
, w
, top
);
1013 move_it_to (&it
, charpos
, 0, it
.last_visible_y
, -1,
1014 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
1016 /* Note that we may overshoot because of invisible text. */
1017 if (IT_CHARPOS (it
) >= charpos
)
1019 int line_height
, line_bottom_y
;
1020 int line_top_y
= it
.current_y
;
1021 int window_top_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1023 line_height
= it
.max_ascent
+ it
.max_descent
;
1024 if (line_height
== 0)
1027 line_height
= last_height
;
1028 else if (charpos
< ZV
)
1030 move_it_by_lines (&it
, 1, 1);
1031 line_height
= (it
.max_ascent
|| it
.max_descent
1032 ? it
.max_ascent
+ it
.max_descent
1037 /* Use the default character height. */
1038 it
.what
= IT_CHARACTER
;
1041 PRODUCE_GLYPHS (&it
);
1042 line_height
= it
.ascent
+ it
.descent
;
1045 line_bottom_y
= line_top_y
+ line_height
;
1047 if (line_top_y
< window_top_y
)
1048 visible_p
= line_bottom_y
> window_top_y
;
1049 else if (line_top_y
< it
.last_visible_y
)
1052 *fully
= line_bottom_y
<= it
.last_visible_y
;
1055 else if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
> it
.last_visible_y
)
1057 move_it_by_lines (&it
, 1, 0);
1058 if (charpos
< IT_CHARPOS (it
))
1066 set_buffer_internal_1 (old_buffer
);
1068 current_header_line_height
= current_mode_line_height
= -1;
1073 /* Return the next character from STR which is MAXLEN bytes long.
1074 Return in *LEN the length of the character. This is like
1075 STRING_CHAR_AND_LENGTH but never returns an invalid character. If
1076 we find one, we return a `?', but with the length of the invalid
1080 string_char_and_length (str
, maxlen
, len
)
1086 c
= STRING_CHAR_AND_LENGTH (str
, maxlen
, *len
);
1087 if (!CHAR_VALID_P (c
, 1))
1088 /* We may not change the length here because other places in Emacs
1089 don't use this function, i.e. they silently accept invalid
1098 /* Given a position POS containing a valid character and byte position
1099 in STRING, return the position NCHARS ahead (NCHARS >= 0). */
1101 static struct text_pos
1102 string_pos_nchars_ahead (pos
, string
, nchars
)
1103 struct text_pos pos
;
1107 xassert (STRINGP (string
) && nchars
>= 0);
1109 if (STRING_MULTIBYTE (string
))
1111 int rest
= STRING_BYTES (XSTRING (string
)) - BYTEPOS (pos
);
1112 unsigned char *p
= XSTRING (string
)->data
+ BYTEPOS (pos
);
1117 string_char_and_length (p
, rest
, &len
);
1118 p
+= len
, rest
-= len
;
1119 xassert (rest
>= 0);
1121 BYTEPOS (pos
) += len
;
1125 SET_TEXT_POS (pos
, CHARPOS (pos
) + nchars
, BYTEPOS (pos
) + nchars
);
1131 /* Value is the text position, i.e. character and byte position,
1132 for character position CHARPOS in STRING. */
1134 static INLINE
struct text_pos
1135 string_pos (charpos
, string
)
1139 struct text_pos pos
;
1140 xassert (STRINGP (string
));
1141 xassert (charpos
>= 0);
1142 SET_TEXT_POS (pos
, charpos
, string_char_to_byte (string
, charpos
));
1147 /* Value is a text position, i.e. character and byte position, for
1148 character position CHARPOS in C string S. MULTIBYTE_P non-zero
1149 means recognize multibyte characters. */
1151 static struct text_pos
1152 c_string_pos (charpos
, s
, multibyte_p
)
1157 struct text_pos pos
;
1159 xassert (s
!= NULL
);
1160 xassert (charpos
>= 0);
1164 int rest
= strlen (s
), len
;
1166 SET_TEXT_POS (pos
, 0, 0);
1169 string_char_and_length (s
, rest
, &len
);
1170 s
+= len
, rest
-= len
;
1171 xassert (rest
>= 0);
1173 BYTEPOS (pos
) += len
;
1177 SET_TEXT_POS (pos
, charpos
, charpos
);
1183 /* Value is the number of characters in C string S. MULTIBYTE_P
1184 non-zero means recognize multibyte characters. */
1187 number_of_chars (s
, multibyte_p
)
1195 int rest
= strlen (s
), len
;
1196 unsigned char *p
= (unsigned char *) s
;
1198 for (nchars
= 0; rest
> 0; ++nchars
)
1200 string_char_and_length (p
, rest
, &len
);
1201 rest
-= len
, p
+= len
;
1205 nchars
= strlen (s
);
1211 /* Compute byte position NEWPOS->bytepos corresponding to
1212 NEWPOS->charpos. POS is a known position in string STRING.
1213 NEWPOS->charpos must be >= POS.charpos. */
1216 compute_string_pos (newpos
, pos
, string
)
1217 struct text_pos
*newpos
, pos
;
1220 xassert (STRINGP (string
));
1221 xassert (CHARPOS (*newpos
) >= CHARPOS (pos
));
1223 if (STRING_MULTIBYTE (string
))
1224 *newpos
= string_pos_nchars_ahead (pos
, string
,
1225 CHARPOS (*newpos
) - CHARPOS (pos
));
1227 BYTEPOS (*newpos
) = CHARPOS (*newpos
);
1232 /***********************************************************************
1233 Lisp form evaluation
1234 ***********************************************************************/
1236 /* Error handler for safe_eval and safe_call. */
1239 safe_eval_handler (arg
)
1242 add_to_log ("Error during redisplay: %s", arg
, Qnil
);
1247 /* Evaluate SEXPR and return the result, or nil if something went
1254 int count
= BINDING_STACK_SIZE ();
1255 struct gcpro gcpro1
;
1259 specbind (Qinhibit_redisplay
, Qt
);
1260 val
= internal_condition_case_1 (Feval
, sexpr
, Qerror
, safe_eval_handler
);
1262 return unbind_to (count
, val
);
1266 /* Call function ARGS[0] with arguments ARGS[1] to ARGS[NARGS - 1].
1267 Return the result, or nil if something went wrong. */
1270 safe_call (nargs
, args
)
1274 int count
= BINDING_STACK_SIZE ();
1276 struct gcpro gcpro1
;
1279 gcpro1
.nvars
= nargs
;
1280 specbind (Qinhibit_redisplay
, Qt
);
1281 val
= internal_condition_case_2 (Ffuncall
, nargs
, args
, Qerror
,
1284 return unbind_to (count
, val
);
1288 /* Call function FN with one argument ARG.
1289 Return the result, or nil if something went wrong. */
1292 safe_call1 (fn
, arg
)
1293 Lisp_Object fn
, arg
;
1295 Lisp_Object args
[2];
1298 return safe_call (2, args
);
1303 /***********************************************************************
1305 ***********************************************************************/
1309 /* Define CHECK_IT to perform sanity checks on iterators.
1310 This is for debugging. It is too slow to do unconditionally. */
1316 if (it
->method
== next_element_from_string
)
1318 xassert (STRINGP (it
->string
));
1319 xassert (IT_STRING_CHARPOS (*it
) >= 0);
1321 else if (it
->method
== next_element_from_buffer
)
1323 /* Check that character and byte positions agree. */
1324 xassert (IT_CHARPOS (*it
) == BYTE_TO_CHAR (IT_BYTEPOS (*it
)));
1328 xassert (it
->current
.dpvec_index
>= 0);
1330 xassert (it
->current
.dpvec_index
< 0);
1333 #define CHECK_IT(IT) check_it ((IT))
1337 #define CHECK_IT(IT) (void) 0
1344 /* Check that the window end of window W is what we expect it
1345 to be---the last row in the current matrix displaying text. */
1348 check_window_end (w
)
1351 if (!MINI_WINDOW_P (w
)
1352 && !NILP (w
->window_end_valid
))
1354 struct glyph_row
*row
;
1355 xassert ((row
= MATRIX_ROW (w
->current_matrix
,
1356 XFASTINT (w
->window_end_vpos
)),
1358 || MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1359 || MATRIX_ROW_VPOS (row
, w
->current_matrix
) == 0));
1363 #define CHECK_WINDOW_END(W) check_window_end ((W))
1365 #else /* not GLYPH_DEBUG */
1367 #define CHECK_WINDOW_END(W) (void) 0
1369 #endif /* not GLYPH_DEBUG */
1373 /***********************************************************************
1374 Iterator initialization
1375 ***********************************************************************/
1377 /* Initialize IT for displaying current_buffer in window W, starting
1378 at character position CHARPOS. CHARPOS < 0 means that no buffer
1379 position is specified which is useful when the iterator is assigned
1380 a position later. BYTEPOS is the byte position corresponding to
1381 CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS.
1383 If ROW is not null, calls to produce_glyphs with IT as parameter
1384 will produce glyphs in that row.
1386 BASE_FACE_ID is the id of a base face to use. It must be one of
1387 DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or
1388 HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for
1389 displaying the tool-bar.
1391 If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or
1392 HEADER_LINE_FACE_ID, the iterator will be initialized to use the
1393 corresponding mode line glyph row of the desired matrix of W. */
1396 init_iterator (it
, w
, charpos
, bytepos
, row
, base_face_id
)
1399 int charpos
, bytepos
;
1400 struct glyph_row
*row
;
1401 enum face_id base_face_id
;
1403 int highlight_region_p
;
1405 /* Some precondition checks. */
1406 xassert (w
!= NULL
&& it
!= NULL
);
1407 xassert (charpos
< 0 || (charpos
> 0 && charpos
<= ZV
));
1409 /* If face attributes have been changed since the last redisplay,
1410 free realized faces now because they depend on face definitions
1411 that might have changed. */
1412 if (face_change_count
)
1414 face_change_count
= 0;
1415 free_all_realized_faces (Qnil
);
1418 /* Use one of the mode line rows of W's desired matrix if
1422 if (base_face_id
== MODE_LINE_FACE_ID
)
1423 row
= MATRIX_MODE_LINE_ROW (w
->desired_matrix
);
1424 else if (base_face_id
== HEADER_LINE_FACE_ID
)
1425 row
= MATRIX_HEADER_LINE_ROW (w
->desired_matrix
);
1429 bzero (it
, sizeof *it
);
1430 it
->current
.overlay_string_index
= -1;
1431 it
->current
.dpvec_index
= -1;
1432 it
->base_face_id
= base_face_id
;
1434 /* The window in which we iterate over current_buffer: */
1435 XSETWINDOW (it
->window
, w
);
1437 it
->f
= XFRAME (w
->frame
);
1439 /* Extra space between lines (on window systems only). */
1440 if (base_face_id
== DEFAULT_FACE_ID
1441 && FRAME_WINDOW_P (it
->f
))
1443 if (NATNUMP (current_buffer
->extra_line_spacing
))
1444 it
->extra_line_spacing
= XFASTINT (current_buffer
->extra_line_spacing
);
1445 else if (it
->f
->extra_line_spacing
> 0)
1446 it
->extra_line_spacing
= it
->f
->extra_line_spacing
;
1449 /* If realized faces have been removed, e.g. because of face
1450 attribute changes of named faces, recompute them. When running
1451 in batch mode, the face cache of Vterminal_frame is null. If
1452 we happen to get called, make a dummy face cache. */
1457 FRAME_FACE_CACHE (it
->f
) == NULL
)
1458 init_frame_faces (it
->f
);
1459 if (FRAME_FACE_CACHE (it
->f
)->used
== 0)
1460 recompute_basic_faces (it
->f
);
1462 /* Current value of the `space-width', and 'height' properties. */
1463 it
->space_width
= Qnil
;
1464 it
->font_height
= Qnil
;
1466 /* Are control characters displayed as `^C'? */
1467 it
->ctl_arrow_p
= !NILP (current_buffer
->ctl_arrow
);
1469 /* -1 means everything between a CR and the following line end
1470 is invisible. >0 means lines indented more than this value are
1472 it
->selective
= (INTEGERP (current_buffer
->selective_display
)
1473 ? XFASTINT (current_buffer
->selective_display
)
1474 : (!NILP (current_buffer
->selective_display
)
1476 it
->selective_display_ellipsis_p
1477 = !NILP (current_buffer
->selective_display_ellipses
);
1479 /* Display table to use. */
1480 it
->dp
= window_display_table (w
);
1482 /* Are multibyte characters enabled in current_buffer? */
1483 it
->multibyte_p
= !NILP (current_buffer
->enable_multibyte_characters
);
1485 /* Non-zero if we should highlight the region. */
1487 = (!NILP (Vtransient_mark_mode
)
1488 && !NILP (current_buffer
->mark_active
)
1489 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
1491 /* Set IT->region_beg_charpos and IT->region_end_charpos to the
1492 start and end of a visible region in window IT->w. Set both to
1493 -1 to indicate no region. */
1494 if (highlight_region_p
1495 /* Maybe highlight only in selected window. */
1496 && (/* Either show region everywhere. */
1497 highlight_nonselected_windows
1498 /* Or show region in the selected window. */
1499 || w
== XWINDOW (selected_window
)
1500 /* Or show the region if we are in the mini-buffer and W is
1501 the window the mini-buffer refers to. */
1502 || (MINI_WINDOW_P (XWINDOW (selected_window
))
1503 && w
== XWINDOW (Vminibuf_scroll_window
))))
1505 int charpos
= marker_position (current_buffer
->mark
);
1506 it
->region_beg_charpos
= min (PT
, charpos
);
1507 it
->region_end_charpos
= max (PT
, charpos
);
1510 it
->region_beg_charpos
= it
->region_end_charpos
= -1;
1512 /* Get the position at which the redisplay_end_trigger hook should
1513 be run, if it is to be run at all. */
1514 if (MARKERP (w
->redisplay_end_trigger
)
1515 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
1516 it
->redisplay_end_trigger_charpos
1517 = marker_position (w
->redisplay_end_trigger
);
1518 else if (INTEGERP (w
->redisplay_end_trigger
))
1519 it
->redisplay_end_trigger_charpos
= XINT (w
->redisplay_end_trigger
);
1521 /* Correct bogus values of tab_width. */
1522 it
->tab_width
= XINT (current_buffer
->tab_width
);
1523 if (it
->tab_width
<= 0 || it
->tab_width
> 1000)
1526 /* Are lines in the display truncated? */
1527 it
->truncate_lines_p
1528 = (base_face_id
!= DEFAULT_FACE_ID
1529 || XINT (it
->w
->hscroll
)
1530 || (truncate_partial_width_windows
1531 && !WINDOW_FULL_WIDTH_P (it
->w
))
1532 || !NILP (current_buffer
->truncate_lines
));
1534 /* Get dimensions of truncation and continuation glyphs. These are
1535 displayed as bitmaps under X, so we don't need them for such
1537 if (!FRAME_WINDOW_P (it
->f
))
1539 if (it
->truncate_lines_p
)
1541 /* We will need the truncation glyph. */
1542 xassert (it
->glyph_row
== NULL
);
1543 produce_special_glyphs (it
, IT_TRUNCATION
);
1544 it
->truncation_pixel_width
= it
->pixel_width
;
1548 /* We will need the continuation glyph. */
1549 xassert (it
->glyph_row
== NULL
);
1550 produce_special_glyphs (it
, IT_CONTINUATION
);
1551 it
->continuation_pixel_width
= it
->pixel_width
;
1554 /* Reset these values to zero becaue the produce_special_glyphs
1555 above has changed them. */
1556 it
->pixel_width
= it
->ascent
= it
->descent
= 0;
1557 it
->phys_ascent
= it
->phys_descent
= 0;
1560 /* Set this after getting the dimensions of truncation and
1561 continuation glyphs, so that we don't produce glyphs when calling
1562 produce_special_glyphs, above. */
1563 it
->glyph_row
= row
;
1564 it
->area
= TEXT_AREA
;
1566 /* Get the dimensions of the display area. The display area
1567 consists of the visible window area plus a horizontally scrolled
1568 part to the left of the window. All x-values are relative to the
1569 start of this total display area. */
1570 if (base_face_id
!= DEFAULT_FACE_ID
)
1572 /* Mode lines, menu bar in terminal frames. */
1573 it
->first_visible_x
= 0;
1574 it
->last_visible_x
= XFASTINT (w
->width
) * CANON_X_UNIT (it
->f
);
1579 = XFASTINT (it
->w
->hscroll
) * CANON_X_UNIT (it
->f
);
1580 it
->last_visible_x
= (it
->first_visible_x
1581 + window_box_width (w
, TEXT_AREA
));
1583 /* If we truncate lines, leave room for the truncator glyph(s) at
1584 the right margin. Otherwise, leave room for the continuation
1585 glyph(s). Truncation and continuation glyphs are not inserted
1586 for window-based redisplay. */
1587 if (!FRAME_WINDOW_P (it
->f
))
1589 if (it
->truncate_lines_p
)
1590 it
->last_visible_x
-= it
->truncation_pixel_width
;
1592 it
->last_visible_x
-= it
->continuation_pixel_width
;
1595 it
->header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
1596 it
->current_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
) + w
->vscroll
;
1599 /* Leave room for a border glyph. */
1600 if (!FRAME_WINDOW_P (it
->f
)
1601 && !WINDOW_RIGHTMOST_P (it
->w
))
1602 it
->last_visible_x
-= 1;
1604 it
->last_visible_y
= window_text_bottom_y (w
);
1606 /* For mode lines and alike, arrange for the first glyph having a
1607 left box line if the face specifies a box. */
1608 if (base_face_id
!= DEFAULT_FACE_ID
)
1612 it
->face_id
= base_face_id
;
1614 /* If we have a boxed mode line, make the first character appear
1615 with a left box line. */
1616 face
= FACE_FROM_ID (it
->f
, base_face_id
);
1617 if (face
->box
!= FACE_NO_BOX
)
1618 it
->start_of_box_run_p
= 1;
1621 /* If a buffer position was specified, set the iterator there,
1622 getting overlays and face properties from that position. */
1625 it
->end_charpos
= ZV
;
1627 IT_CHARPOS (*it
) = charpos
;
1629 /* Compute byte position if not specified. */
1631 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (charpos
);
1633 IT_BYTEPOS (*it
) = bytepos
;
1635 /* Compute faces etc. */
1636 reseat (it
, it
->current
.pos
, 1);
1643 /* Initialize IT for the display of window W with window start POS. */
1646 start_display (it
, w
, pos
)
1649 struct text_pos pos
;
1651 int start_at_line_beg_p
;
1652 struct glyph_row
*row
;
1653 int first_vpos
= WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0;
1656 row
= w
->desired_matrix
->rows
+ first_vpos
;
1657 init_iterator (it
, w
, CHARPOS (pos
), BYTEPOS (pos
), row
, DEFAULT_FACE_ID
);
1658 first_y
= it
->current_y
;
1660 /* If window start is not at a line start, move back to the line
1661 start. This makes sure that we take continuation lines into
1663 start_at_line_beg_p
= (CHARPOS (pos
) == BEGV
1664 || FETCH_BYTE (BYTEPOS (pos
) - 1) == '\n');
1665 if (!start_at_line_beg_p
)
1666 reseat_at_previous_visible_line_start (it
);
1668 /* If window start is not at a line start, skip forward to POS to
1669 get the correct continuation_lines_width and current_x. */
1670 if (!start_at_line_beg_p
)
1672 move_it_to (it
, CHARPOS (pos
), -1, -1, -1, MOVE_TO_POS
);
1674 /* If lines are continued, this line may end in the middle of a
1675 multi-glyph character (e.g. a control character displayed as
1676 \003, or in the middle of an overlay string). In this case
1677 move_it_to above will not have taken us to the start of
1678 the continuation line but to the end of the continued line. */
1679 if (!it
->truncate_lines_p
)
1681 if (it
->current_x
> 0)
1683 if (it
->current
.dpvec_index
>= 0
1684 || it
->current
.overlay_string_index
>= 0)
1686 set_iterator_to_next (it
, 1);
1687 move_it_in_display_line_to (it
, -1, -1, 0);
1690 it
->continuation_lines_width
+= it
->current_x
;
1693 /* We're starting a new display line, not affected by the
1694 height of the continued line, so clear the appropriate
1695 fields in the iterator structure. */
1696 it
->max_ascent
= it
->max_descent
= 0;
1697 it
->max_phys_ascent
= it
->max_phys_descent
= 0;
1700 it
->current_y
= first_y
;
1702 it
->current_x
= it
->hpos
= 0;
1705 #if 0 /* Don't assert the following because start_display is sometimes
1706 called intentionally with a window start that is not at a
1707 line start. Please leave this code in as a comment. */
1709 /* Window start should be on a line start, now. */
1710 xassert (it
->continuation_lines_width
1711 || IT_CHARPOS (it
) == BEGV
1712 || FETCH_BYTE (IT_BYTEPOS (it
) - 1) == '\n');
1717 /* Initialize IT for stepping through current_buffer in window W,
1718 starting at position POS that includes overlay string and display
1719 vector/ control character translation position information. */
1722 init_from_display_pos (it
, w
, pos
)
1725 struct display_pos
*pos
;
1727 /* Keep in mind: the call to reseat in init_iterator skips invisible
1728 text, so we might end up at a position different from POS. This
1729 is only a problem when POS is a row start after a newline and an
1730 overlay starts there with an after-string, and the overlay has an
1731 invisible property. Since we don't skip invisible text in
1732 display_line and elsewhere immediately after consuming the
1733 newline before the row start, such a POS will not be in a string,
1734 but the call to init_iterator below will move us to the
1736 init_iterator (it
, w
, CHARPOS (pos
->pos
), BYTEPOS (pos
->pos
),
1737 NULL
, DEFAULT_FACE_ID
);
1739 /* If position is within an overlay string, set up IT to
1740 the right overlay string. */
1741 if (pos
->overlay_string_index
>= 0)
1745 /* We already have the first chunk of overlay strings in
1746 IT->overlay_strings. Load more until the one for
1747 pos->overlay_string_index is in IT->overlay_strings. */
1748 if (pos
->overlay_string_index
>= OVERLAY_STRING_CHUNK_SIZE
)
1750 int n
= pos
->overlay_string_index
/ OVERLAY_STRING_CHUNK_SIZE
;
1751 it
->current
.overlay_string_index
= 0;
1754 load_overlay_strings (it
);
1755 it
->current
.overlay_string_index
+= OVERLAY_STRING_CHUNK_SIZE
;
1759 it
->current
.overlay_string_index
= pos
->overlay_string_index
;
1760 relative_index
= (it
->current
.overlay_string_index
1761 % OVERLAY_STRING_CHUNK_SIZE
);
1762 it
->string
= it
->overlay_strings
[relative_index
];
1763 xassert (STRINGP (it
->string
));
1764 it
->current
.string_pos
= pos
->string_pos
;
1765 it
->method
= next_element_from_string
;
1767 else if (it
->current
.overlay_string_index
>= 0)
1769 /* If POS says we're already after an overlay string ending at
1770 POS, make sure to pop the iterator because it will be in
1771 front of that overlay string. When POS is ZV, we've thereby
1772 also ``processed'' overlay strings at ZV. */
1775 it
->current
.overlay_string_index
= -1;
1776 it
->method
= next_element_from_buffer
;
1777 if (CHARPOS (pos
->pos
) == ZV
)
1778 it
->overlay_strings_at_end_processed_p
= 1;
1781 if (CHARPOS (pos
->string_pos
) >= 0)
1783 /* Recorded position is not in an overlay string, but in another
1784 string. This can only be a string from a `display' property.
1785 IT should already be filled with that string. */
1786 it
->current
.string_pos
= pos
->string_pos
;
1787 xassert (STRINGP (it
->string
));
1790 /* Restore position in display vector translations or control
1791 character translations. */
1792 if (pos
->dpvec_index
>= 0)
1794 /* This fills IT->dpvec. */
1795 get_next_display_element (it
);
1796 xassert (it
->dpvec
&& it
->current
.dpvec_index
== 0);
1797 it
->current
.dpvec_index
= pos
->dpvec_index
;
1804 /* Initialize IT for stepping through current_buffer in window W
1805 starting at ROW->start. */
1808 init_to_row_start (it
, w
, row
)
1811 struct glyph_row
*row
;
1813 init_from_display_pos (it
, w
, &row
->start
);
1814 it
->continuation_lines_width
= row
->continuation_lines_width
;
1819 /* Initialize IT for stepping through current_buffer in window W
1820 starting in the line following ROW, i.e. starting at ROW->end. */
1823 init_to_row_end (it
, w
, row
)
1826 struct glyph_row
*row
;
1828 init_from_display_pos (it
, w
, &row
->end
);
1830 if (row
->continued_p
)
1831 it
->continuation_lines_width
= (row
->continuation_lines_width
1832 + row
->pixel_width
);
1839 /***********************************************************************
1841 ***********************************************************************/
1843 /* Called when IT reaches IT->stop_charpos. Handle text property and
1844 overlay changes. Set IT->stop_charpos to the next position where
1851 enum prop_handled handled
;
1852 int handle_overlay_change_p
= 1;
1856 it
->current
.dpvec_index
= -1;
1860 handled
= HANDLED_NORMALLY
;
1862 /* Call text property handlers. */
1863 for (p
= it_props
; p
->handler
; ++p
)
1865 handled
= p
->handler (it
);
1867 if (handled
== HANDLED_RECOMPUTE_PROPS
)
1869 else if (handled
== HANDLED_RETURN
)
1871 else if (handled
== HANDLED_OVERLAY_STRING_CONSUMED
)
1872 handle_overlay_change_p
= 0;
1875 if (handled
!= HANDLED_RECOMPUTE_PROPS
)
1877 /* Don't check for overlay strings below when set to deliver
1878 characters from a display vector. */
1879 if (it
->method
== next_element_from_display_vector
)
1880 handle_overlay_change_p
= 0;
1882 /* Handle overlay changes. */
1883 if (handle_overlay_change_p
)
1884 handled
= handle_overlay_change (it
);
1886 /* Determine where to stop next. */
1887 if (handled
== HANDLED_NORMALLY
)
1888 compute_stop_pos (it
);
1891 while (handled
== HANDLED_RECOMPUTE_PROPS
);
1895 /* Compute IT->stop_charpos from text property and overlay change
1896 information for IT's current position. */
1899 compute_stop_pos (it
)
1902 register INTERVAL iv
, next_iv
;
1903 Lisp_Object object
, limit
, position
;
1905 /* If nowhere else, stop at the end. */
1906 it
->stop_charpos
= it
->end_charpos
;
1908 if (STRINGP (it
->string
))
1910 /* Strings are usually short, so don't limit the search for
1912 object
= it
->string
;
1914 XSETFASTINT (position
, IT_STRING_CHARPOS (*it
));
1920 /* If next overlay change is in front of the current stop pos
1921 (which is IT->end_charpos), stop there. Note: value of
1922 next_overlay_change is point-max if no overlay change
1924 charpos
= next_overlay_change (IT_CHARPOS (*it
));
1925 if (charpos
< it
->stop_charpos
)
1926 it
->stop_charpos
= charpos
;
1928 /* If showing the region, we have to stop at the region
1929 start or end because the face might change there. */
1930 if (it
->region_beg_charpos
> 0)
1932 if (IT_CHARPOS (*it
) < it
->region_beg_charpos
)
1933 it
->stop_charpos
= min (it
->stop_charpos
, it
->region_beg_charpos
);
1934 else if (IT_CHARPOS (*it
) < it
->region_end_charpos
)
1935 it
->stop_charpos
= min (it
->stop_charpos
, it
->region_end_charpos
);
1938 /* Set up variables for computing the stop position from text
1939 property changes. */
1940 XSETBUFFER (object
, current_buffer
);
1941 XSETFASTINT (limit
, IT_CHARPOS (*it
) + TEXT_PROP_DISTANCE_LIMIT
);
1942 XSETFASTINT (position
, IT_CHARPOS (*it
));
1946 /* Get the interval containing IT's position. Value is a null
1947 interval if there isn't such an interval. */
1948 iv
= validate_interval_range (object
, &position
, &position
, 0);
1949 if (!NULL_INTERVAL_P (iv
))
1951 Lisp_Object values_here
[LAST_PROP_IDX
];
1954 /* Get properties here. */
1955 for (p
= it_props
; p
->handler
; ++p
)
1956 values_here
[p
->idx
] = textget (iv
->plist
, *p
->name
);
1958 /* Look for an interval following iv that has different
1960 for (next_iv
= next_interval (iv
);
1961 (!NULL_INTERVAL_P (next_iv
)
1963 || XFASTINT (limit
) > next_iv
->position
));
1964 next_iv
= next_interval (next_iv
))
1966 for (p
= it_props
; p
->handler
; ++p
)
1968 Lisp_Object new_value
;
1970 new_value
= textget (next_iv
->plist
, *p
->name
);
1971 if (!EQ (values_here
[p
->idx
], new_value
))
1979 if (!NULL_INTERVAL_P (next_iv
))
1981 if (INTEGERP (limit
)
1982 && next_iv
->position
>= XFASTINT (limit
))
1983 /* No text property change up to limit. */
1984 it
->stop_charpos
= min (XFASTINT (limit
), it
->stop_charpos
);
1986 /* Text properties change in next_iv. */
1987 it
->stop_charpos
= min (it
->stop_charpos
, next_iv
->position
);
1991 xassert (STRINGP (it
->string
)
1992 || (it
->stop_charpos
>= BEGV
1993 && it
->stop_charpos
>= IT_CHARPOS (*it
)));
1997 /* Return the position of the next overlay change after POS in
1998 current_buffer. Value is point-max if no overlay change
1999 follows. This is like `next-overlay-change' but doesn't use
2003 next_overlay_change (pos
)
2008 Lisp_Object
*overlays
;
2012 /* Get all overlays at the given position. */
2014 overlays
= (Lisp_Object
*) alloca (len
* sizeof *overlays
);
2015 noverlays
= overlays_at (pos
, 0, &overlays
, &len
, &endpos
, NULL
, 1);
2016 if (noverlays
> len
)
2019 overlays
= (Lisp_Object
*) alloca (len
* sizeof *overlays
);
2020 noverlays
= overlays_at (pos
, 0, &overlays
, &len
, &endpos
, NULL
, 1);
2023 /* If any of these overlays ends before endpos,
2024 use its ending point instead. */
2025 for (i
= 0; i
< noverlays
; ++i
)
2030 oend
= OVERLAY_END (overlays
[i
]);
2031 oendpos
= OVERLAY_POSITION (oend
);
2032 endpos
= min (endpos
, oendpos
);
2040 /***********************************************************************
2042 ***********************************************************************/
2044 /* Handle changes in the `fontified' property of the current buffer by
2045 calling hook functions from Qfontification_functions to fontify
2048 static enum prop_handled
2049 handle_fontified_prop (it
)
2052 Lisp_Object prop
, pos
;
2053 enum prop_handled handled
= HANDLED_NORMALLY
;
2055 /* Get the value of the `fontified' property at IT's current buffer
2056 position. (The `fontified' property doesn't have a special
2057 meaning in strings.) If the value is nil, call functions from
2058 Qfontification_functions. */
2059 if (!STRINGP (it
->string
)
2061 && !NILP (Vfontification_functions
)
2062 && !NILP (Vrun_hooks
)
2063 && (pos
= make_number (IT_CHARPOS (*it
)),
2064 prop
= Fget_char_property (pos
, Qfontified
, Qnil
),
2067 int count
= BINDING_STACK_SIZE ();
2070 val
= Vfontification_functions
;
2071 specbind (Qfontification_functions
, Qnil
);
2072 specbind (Qafter_change_functions
, Qnil
);
2074 if (!CONSP (val
) || EQ (XCAR (val
), Qlambda
))
2075 safe_call1 (val
, pos
);
2078 Lisp_Object globals
, fn
;
2079 struct gcpro gcpro1
, gcpro2
;
2082 GCPRO2 (val
, globals
);
2084 for (; CONSP (val
); val
= XCDR (val
))
2090 /* A value of t indicates this hook has a local
2091 binding; it means to run the global binding too.
2092 In a global value, t should not occur. If it
2093 does, we must ignore it to avoid an endless
2095 for (globals
= Fdefault_value (Qfontification_functions
);
2097 globals
= XCDR (globals
))
2099 fn
= XCAR (globals
);
2101 safe_call1 (fn
, pos
);
2105 safe_call1 (fn
, pos
);
2111 unbind_to (count
, Qnil
);
2113 /* Return HANDLED_RECOMPUTE_PROPS only if function fontified
2114 something. This avoids an endless loop if they failed to
2115 fontify the text for which reason ever. */
2116 if (!NILP (Fget_char_property (pos
, Qfontified
, Qnil
)))
2117 handled
= HANDLED_RECOMPUTE_PROPS
;
2125 /***********************************************************************
2127 ***********************************************************************/
2129 /* Set up iterator IT from face properties at its current position.
2130 Called from handle_stop. */
2132 static enum prop_handled
2133 handle_face_prop (it
)
2136 int new_face_id
, next_stop
;
2138 if (!STRINGP (it
->string
))
2141 = face_at_buffer_position (it
->w
,
2143 it
->region_beg_charpos
,
2144 it
->region_end_charpos
,
2147 + TEXT_PROP_DISTANCE_LIMIT
),
2150 /* Is this a start of a run of characters with box face?
2151 Caveat: this can be called for a freshly initialized
2152 iterator; face_id is -1 is this case. We know that the new
2153 face will not change until limit, i.e. if the new face has a
2154 box, all characters up to limit will have one. But, as
2155 usual, we don't know whether limit is really the end. */
2156 if (new_face_id
!= it
->face_id
)
2158 struct face
*new_face
= FACE_FROM_ID (it
->f
, new_face_id
);
2160 /* If new face has a box but old face has not, this is
2161 the start of a run of characters with box, i.e. it has
2162 a shadow on the left side. The value of face_id of the
2163 iterator will be -1 if this is the initial call that gets
2164 the face. In this case, we have to look in front of IT's
2165 position and see whether there is a face != new_face_id. */
2166 it
->start_of_box_run_p
2167 = (new_face
->box
!= FACE_NO_BOX
2168 && (it
->face_id
>= 0
2169 || IT_CHARPOS (*it
) == BEG
2170 || new_face_id
!= face_before_it_pos (it
)));
2171 it
->face_box_p
= new_face
->box
!= FACE_NO_BOX
;
2176 int base_face_id
, bufpos
;
2178 if (it
->current
.overlay_string_index
>= 0)
2179 bufpos
= IT_CHARPOS (*it
);
2183 /* For strings from a buffer, i.e. overlay strings or strings
2184 from a `display' property, use the face at IT's current
2185 buffer position as the base face to merge with, so that
2186 overlay strings appear in the same face as surrounding
2187 text, unless they specify their own faces. */
2188 base_face_id
= underlying_face_id (it
);
2190 new_face_id
= face_at_string_position (it
->w
,
2192 IT_STRING_CHARPOS (*it
),
2194 it
->region_beg_charpos
,
2195 it
->region_end_charpos
,
2199 #if 0 /* This shouldn't be neccessary. Let's check it. */
2200 /* If IT is used to display a mode line we would really like to
2201 use the mode line face instead of the frame's default face. */
2202 if (it
->glyph_row
== MATRIX_MODE_LINE_ROW (it
->w
->desired_matrix
)
2203 && new_face_id
== DEFAULT_FACE_ID
)
2204 new_face_id
= MODE_LINE_FACE_ID
;
2207 /* Is this a start of a run of characters with box? Caveat:
2208 this can be called for a freshly allocated iterator; face_id
2209 is -1 is this case. We know that the new face will not
2210 change until the next check pos, i.e. if the new face has a
2211 box, all characters up to that position will have a
2212 box. But, as usual, we don't know whether that position
2213 is really the end. */
2214 if (new_face_id
!= it
->face_id
)
2216 struct face
*new_face
= FACE_FROM_ID (it
->f
, new_face_id
);
2217 struct face
*old_face
= FACE_FROM_ID (it
->f
, it
->face_id
);
2219 /* If new face has a box but old face hasn't, this is the
2220 start of a run of characters with box, i.e. it has a
2221 shadow on the left side. */
2222 it
->start_of_box_run_p
2223 = new_face
->box
&& (old_face
== NULL
|| !old_face
->box
);
2224 it
->face_box_p
= new_face
->box
!= FACE_NO_BOX
;
2228 it
->face_id
= new_face_id
;
2229 return HANDLED_NORMALLY
;
2233 /* Return the ID of the face ``underlying'' IT's current position,
2234 which is in a string. If the iterator is associated with a
2235 buffer, return the face at IT's current buffer position.
2236 Otherwise, use the iterator's base_face_id. */
2239 underlying_face_id (it
)
2242 int face_id
= it
->base_face_id
, i
;
2244 xassert (STRINGP (it
->string
));
2246 for (i
= it
->sp
- 1; i
>= 0; --i
)
2247 if (NILP (it
->stack
[i
].string
))
2248 face_id
= it
->stack
[i
].face_id
;
2254 /* Compute the face one character before or after the current position
2255 of IT. BEFORE_P non-zero means get the face in front of IT's
2256 position. Value is the id of the face. */
2259 face_before_or_after_it_pos (it
, before_p
)
2264 int next_check_charpos
;
2265 struct text_pos pos
;
2267 xassert (it
->s
== NULL
);
2269 if (STRINGP (it
->string
))
2271 int bufpos
, base_face_id
;
2273 /* No face change past the end of the string (for the case
2274 we are padding with spaces). No face change before the
2276 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
2277 || (IT_STRING_CHARPOS (*it
) == 0 && before_p
))
2280 /* Set pos to the position before or after IT's current position. */
2282 pos
= string_pos (IT_STRING_CHARPOS (*it
) - 1, it
->string
);
2284 /* For composition, we must check the character after the
2286 pos
= (it
->what
== IT_COMPOSITION
2287 ? string_pos (IT_STRING_CHARPOS (*it
) + it
->cmp_len
, it
->string
)
2288 : string_pos (IT_STRING_CHARPOS (*it
) + 1, it
->string
));
2290 if (it
->current
.overlay_string_index
>= 0)
2291 bufpos
= IT_CHARPOS (*it
);
2295 base_face_id
= underlying_face_id (it
);
2297 /* Get the face for ASCII, or unibyte. */
2298 face_id
= face_at_string_position (it
->w
,
2302 it
->region_beg_charpos
,
2303 it
->region_end_charpos
,
2304 &next_check_charpos
,
2307 /* Correct the face for charsets different from ASCII. Do it
2308 for the multibyte case only. The face returned above is
2309 suitable for unibyte text if IT->string is unibyte. */
2310 if (STRING_MULTIBYTE (it
->string
))
2312 unsigned char *p
= XSTRING (it
->string
)->data
+ BYTEPOS (pos
);
2313 int rest
= STRING_BYTES (XSTRING (it
->string
)) - BYTEPOS (pos
);
2315 struct face
*face
= FACE_FROM_ID (it
->f
, face_id
);
2317 c
= string_char_and_length (p
, rest
, &len
);
2318 face_id
= FACE_FOR_CHAR (it
->f
, face
, c
);
2323 if ((IT_CHARPOS (*it
) >= ZV
&& !before_p
)
2324 || (IT_CHARPOS (*it
) <= BEGV
&& before_p
))
2327 limit
= IT_CHARPOS (*it
) + TEXT_PROP_DISTANCE_LIMIT
;
2328 pos
= it
->current
.pos
;
2331 DEC_TEXT_POS (pos
, it
->multibyte_p
);
2334 if (it
->what
== IT_COMPOSITION
)
2335 /* For composition, we must check the position after the
2337 pos
.charpos
+= it
->cmp_len
, pos
.bytepos
+= it
->len
;
2339 INC_TEXT_POS (pos
, it
->multibyte_p
);
2342 /* Determine face for CHARSET_ASCII, or unibyte. */
2343 face_id
= face_at_buffer_position (it
->w
,
2345 it
->region_beg_charpos
,
2346 it
->region_end_charpos
,
2347 &next_check_charpos
,
2350 /* Correct the face for charsets different from ASCII. Do it
2351 for the multibyte case only. The face returned above is
2352 suitable for unibyte text if current_buffer is unibyte. */
2353 if (it
->multibyte_p
)
2355 int c
= FETCH_MULTIBYTE_CHAR (CHARPOS (pos
));
2356 struct face
*face
= FACE_FROM_ID (it
->f
, face_id
);
2357 face_id
= FACE_FOR_CHAR (it
->f
, face
, c
);
2366 /***********************************************************************
2368 ***********************************************************************/
2370 /* Set up iterator IT from invisible properties at its current
2371 position. Called from handle_stop. */
2373 static enum prop_handled
2374 handle_invisible_prop (it
)
2377 enum prop_handled handled
= HANDLED_NORMALLY
;
2379 if (STRINGP (it
->string
))
2381 extern Lisp_Object Qinvisible
;
2382 Lisp_Object prop
, end_charpos
, limit
, charpos
;
2384 /* Get the value of the invisible text property at the
2385 current position. Value will be nil if there is no such
2387 XSETFASTINT (charpos
, IT_STRING_CHARPOS (*it
));
2388 prop
= Fget_text_property (charpos
, Qinvisible
, it
->string
);
2391 && IT_STRING_CHARPOS (*it
) < it
->end_charpos
)
2393 handled
= HANDLED_RECOMPUTE_PROPS
;
2395 /* Get the position at which the next change of the
2396 invisible text property can be found in IT->string.
2397 Value will be nil if the property value is the same for
2398 all the rest of IT->string. */
2399 XSETINT (limit
, XSTRING (it
->string
)->size
);
2400 end_charpos
= Fnext_single_property_change (charpos
, Qinvisible
,
2403 /* Text at current position is invisible. The next
2404 change in the property is at position end_charpos.
2405 Move IT's current position to that position. */
2406 if (INTEGERP (end_charpos
)
2407 && XFASTINT (end_charpos
) < XFASTINT (limit
))
2409 struct text_pos old
;
2410 old
= it
->current
.string_pos
;
2411 IT_STRING_CHARPOS (*it
) = XFASTINT (end_charpos
);
2412 compute_string_pos (&it
->current
.string_pos
, old
, it
->string
);
2416 /* The rest of the string is invisible. If this is an
2417 overlay string, proceed with the next overlay string
2418 or whatever comes and return a character from there. */
2419 if (it
->current
.overlay_string_index
>= 0)
2421 next_overlay_string (it
);
2422 /* Don't check for overlay strings when we just
2423 finished processing them. */
2424 handled
= HANDLED_OVERLAY_STRING_CONSUMED
;
2428 struct Lisp_String
*s
= XSTRING (it
->string
);
2429 IT_STRING_CHARPOS (*it
) = s
->size
;
2430 IT_STRING_BYTEPOS (*it
) = STRING_BYTES (s
);
2437 int visible_p
, newpos
, next_stop
;
2438 Lisp_Object pos
, prop
;
2440 /* First of all, is there invisible text at this position? */
2441 XSETFASTINT (pos
, IT_CHARPOS (*it
));
2442 prop
= Fget_char_property (pos
, Qinvisible
, it
->window
);
2444 /* If we are on invisible text, skip over it. */
2445 if (TEXT_PROP_MEANS_INVISIBLE (prop
)
2446 && IT_CHARPOS (*it
) < it
->end_charpos
)
2448 /* Record whether we have to display an ellipsis for the
2450 int display_ellipsis_p
2451 = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop
);
2453 handled
= HANDLED_RECOMPUTE_PROPS
;
2455 /* Loop skipping over invisible text. The loop is left at
2456 ZV or with IT on the first char being visible again. */
2459 /* Try to skip some invisible text. Return value is the
2460 position reached which can be equal to IT's position
2461 if there is nothing invisible here. This skips both
2462 over invisible text properties and overlays with
2463 invisible property. */
2464 newpos
= skip_invisible (IT_CHARPOS (*it
),
2465 &next_stop
, ZV
, it
->window
);
2467 /* If we skipped nothing at all we weren't at invisible
2468 text in the first place. If everything to the end of
2469 the buffer was skipped, end the loop. */
2470 if (newpos
== IT_CHARPOS (*it
) || newpos
>= ZV
)
2474 /* We skipped some characters but not necessarily
2475 all there are. Check if we ended up on visible
2476 text. Fget_char_property returns the property of
2477 the char before the given position, i.e. if we
2478 get visible_p = 1, this means that the char at
2479 newpos is visible. */
2480 XSETFASTINT (pos
, newpos
);
2481 prop
= Fget_char_property (pos
, Qinvisible
, it
->window
);
2482 visible_p
= !TEXT_PROP_MEANS_INVISIBLE (prop
);
2485 /* If we ended up on invisible text, proceed to
2486 skip starting with next_stop. */
2488 IT_CHARPOS (*it
) = next_stop
;
2492 /* The position newpos is now either ZV or on visible text. */
2493 IT_CHARPOS (*it
) = newpos
;
2494 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (newpos
);
2496 /* Maybe return `...' next for the end of the invisible text. */
2497 if (display_ellipsis_p
)
2500 && VECTORP (DISP_INVIS_VECTOR (it
->dp
)))
2502 struct Lisp_Vector
*v
= XVECTOR (DISP_INVIS_VECTOR (it
->dp
));
2503 it
->dpvec
= v
->contents
;
2504 it
->dpend
= v
->contents
+ v
->size
;
2508 /* Default `...'. */
2509 it
->dpvec
= default_invis_vector
;
2510 it
->dpend
= default_invis_vector
+ 3;
2513 /* The ellipsis display does not replace the display of
2514 the character at the new position. Indicate this by
2515 setting IT->dpvec_char_len to zero. */
2516 it
->dpvec_char_len
= 0;
2518 it
->current
.dpvec_index
= 0;
2519 it
->method
= next_element_from_display_vector
;
2529 /***********************************************************************
2531 ***********************************************************************/
2533 /* Set up iterator IT from `display' property at its current position.
2534 Called from handle_stop. */
2536 static enum prop_handled
2537 handle_display_prop (it
)
2540 Lisp_Object prop
, object
;
2541 struct text_pos
*position
;
2542 int space_or_image_found_p
;
2544 if (STRINGP (it
->string
))
2546 object
= it
->string
;
2547 position
= &it
->current
.string_pos
;
2552 position
= &it
->current
.pos
;
2555 /* Reset those iterator values set from display property values. */
2556 it
->font_height
= Qnil
;
2557 it
->space_width
= Qnil
;
2560 /* We don't support recursive `display' properties, i.e. string
2561 values that have a string `display' property, that have a string
2562 `display' property etc. */
2563 if (!it
->string_from_display_prop_p
)
2564 it
->area
= TEXT_AREA
;
2566 prop
= Fget_char_property (make_number (position
->charpos
),
2569 return HANDLED_NORMALLY
;
2571 space_or_image_found_p
= 0;
2573 && CONSP (XCAR (prop
))
2574 && !EQ (Qmargin
, XCAR (XCAR (prop
))))
2576 /* A list of sub-properties. */
2577 while (CONSP (prop
))
2579 if (handle_single_display_prop (it
, XCAR (prop
), object
, position
))
2580 space_or_image_found_p
= 1;
2584 else if (VECTORP (prop
))
2587 for (i
= 0; i
< XVECTOR (prop
)->size
; ++i
)
2588 if (handle_single_display_prop (it
, XVECTOR (prop
)->contents
[i
],
2590 space_or_image_found_p
= 1;
2594 if (handle_single_display_prop (it
, prop
, object
, position
))
2595 space_or_image_found_p
= 1;
2598 return space_or_image_found_p
? HANDLED_RETURN
: HANDLED_NORMALLY
;
2602 /* Value is the position of the end of the `display' property starting
2603 at START_POS in OBJECT. */
2605 static struct text_pos
2606 display_prop_end (it
, object
, start_pos
)
2609 struct text_pos start_pos
;
2612 struct text_pos end_pos
;
2614 end
= Fnext_single_char_property_change (make_number (CHARPOS (start_pos
)),
2615 Qdisplay
, object
, Qnil
);
2616 CHARPOS (end_pos
) = XFASTINT (end
);
2617 if (STRINGP (object
))
2618 compute_string_pos (&end_pos
, start_pos
, it
->string
);
2620 BYTEPOS (end_pos
) = CHAR_TO_BYTE (XFASTINT (end
));
2626 /* Set up IT from a single `display' sub-property value PROP. OBJECT
2627 is the object in which the `display' property was found. *POSITION
2628 is the position at which it was found.
2630 If PROP is a `space' or `image' sub-property, set *POSITION to the
2631 end position of the `display' property.
2633 Value is non-zero if a `space' or `image' property value was found. */
2636 handle_single_display_prop (it
, prop
, object
, position
)
2640 struct text_pos
*position
;
2643 int space_or_image_found_p
= 0;
2646 /* If PROP is a list of the form `(when FORM . VALUE)', FORM is
2647 evaluated. If the result is nil, VALUE is ignored. */
2649 if (CONSP (prop
) && EQ (XCAR (prop
), Qwhen
))
2658 if (!NILP (form
) && !EQ (form
, Qt
))
2660 struct gcpro gcpro1
;
2661 struct text_pos end_pos
, pt
;
2664 end_pos
= display_prop_end (it
, object
, *position
);
2666 /* Temporarily set point to the end position, and then evaluate
2667 the form. This makes `(eolp)' work as FORM. */
2668 if (BUFFERP (object
))
2671 BYTEPOS (pt
) = PT_BYTE
;
2672 TEMP_SET_PT_BOTH (CHARPOS (end_pos
), BYTEPOS (end_pos
));
2675 form
= safe_eval (form
);
2677 if (BUFFERP (object
))
2678 TEMP_SET_PT_BOTH (CHARPOS (pt
), BYTEPOS (pt
));
2686 && EQ (XCAR (prop
), Qheight
)
2687 && CONSP (XCDR (prop
)))
2689 if (FRAME_TERMCAP_P (it
->f
)
2690 || FRAME_MSDOS_P (it
->f
)
2691 || FRAME_W32_CONSOLE_P (it
->f
))
2694 /* `(height HEIGHT)'. */
2695 it
->font_height
= XCAR (XCDR (prop
));
2696 if (!NILP (it
->font_height
))
2698 struct face
*face
= FACE_FROM_ID (it
->f
, it
->face_id
);
2699 int new_height
= -1;
2701 if (CONSP (it
->font_height
)
2702 && (EQ (XCAR (it
->font_height
), Qplus
)
2703 || EQ (XCAR (it
->font_height
), Qminus
))
2704 && CONSP (XCDR (it
->font_height
))
2705 && INTEGERP (XCAR (XCDR (it
->font_height
))))
2707 /* `(+ N)' or `(- N)' where N is an integer. */
2708 int steps
= XINT (XCAR (XCDR (it
->font_height
)));
2709 if (EQ (XCAR (it
->font_height
), Qplus
))
2711 it
->face_id
= smaller_face (it
->f
, it
->face_id
, steps
);
2713 else if (FUNCTIONP (it
->font_height
))
2715 /* Call function with current height as argument.
2716 Value is the new height. */
2718 height
= safe_call1 (it
->font_height
,
2719 face
->lface
[LFACE_HEIGHT_INDEX
]);
2720 if (NUMBERP (height
))
2721 new_height
= XFLOATINT (height
);
2723 else if (NUMBERP (it
->font_height
))
2725 /* Value is a multiple of the canonical char height. */
2728 face
= FACE_FROM_ID (it
->f
, DEFAULT_FACE_ID
);
2729 new_height
= (XFLOATINT (it
->font_height
)
2730 * XINT (face
->lface
[LFACE_HEIGHT_INDEX
]));
2734 /* Evaluate IT->font_height with `height' bound to the
2735 current specified height to get the new height. */
2737 int count
= BINDING_STACK_SIZE ();
2739 specbind (Qheight
, face
->lface
[LFACE_HEIGHT_INDEX
]);
2740 value
= safe_eval (it
->font_height
);
2741 unbind_to (count
, Qnil
);
2743 if (NUMBERP (value
))
2744 new_height
= XFLOATINT (value
);
2748 it
->face_id
= face_with_height (it
->f
, it
->face_id
, new_height
);
2751 else if (CONSP (prop
)
2752 && EQ (XCAR (prop
), Qspace_width
)
2753 && CONSP (XCDR (prop
)))
2755 /* `(space_width WIDTH)'. */
2756 if (FRAME_TERMCAP_P (it
->f
)
2757 || FRAME_MSDOS_P (it
->f
)
2758 || FRAME_W32_CONSOLE_P (it
->f
))
2761 value
= XCAR (XCDR (prop
));
2762 if (NUMBERP (value
) && XFLOATINT (value
) > 0)
2763 it
->space_width
= value
;
2765 else if (CONSP (prop
)
2766 && EQ (XCAR (prop
), Qraise
)
2767 && CONSP (XCDR (prop
)))
2769 /* `(raise FACTOR)'. */
2770 if (FRAME_TERMCAP_P (it
->f
)
2771 || FRAME_MSDOS_P (it
->f
)
2772 || FRAME_W32_CONSOLE_P (it
->f
))
2775 #ifdef HAVE_WINDOW_SYSTEM
2776 value
= XCAR (XCDR (prop
));
2777 if (NUMBERP (value
))
2779 struct face
*face
= FACE_FROM_ID (it
->f
, it
->face_id
);
2780 it
->voffset
= - (XFLOATINT (value
)
2781 * (FONT_HEIGHT (face
->font
)));
2783 #endif /* HAVE_WINDOW_SYSTEM */
2785 else if (!it
->string_from_display_prop_p
)
2787 /* `((margin left-margin) VALUE)' or `((margin right-margin)
2788 VALUE) or `((margin nil) VALUE)' or VALUE. */
2789 Lisp_Object location
, value
;
2790 struct text_pos start_pos
;
2793 /* Characters having this form of property are not displayed, so
2794 we have to find the end of the property. */
2795 start_pos
= *position
;
2796 *position
= display_prop_end (it
, object
, start_pos
);
2799 /* Let's stop at the new position and assume that all
2800 text properties change there. */
2801 it
->stop_charpos
= position
->charpos
;
2803 location
= Qunbound
;
2804 if (CONSP (prop
) && CONSP (XCAR (prop
)))
2808 value
= XCDR (prop
);
2810 value
= XCAR (value
);
2813 if (EQ (XCAR (tem
), Qmargin
)
2814 && (tem
= XCDR (tem
),
2815 tem
= CONSP (tem
) ? XCAR (tem
) : Qnil
,
2817 || EQ (tem
, Qleft_margin
)
2818 || EQ (tem
, Qright_margin
))))
2822 if (EQ (location
, Qunbound
))
2828 #ifdef HAVE_WINDOW_SYSTEM
2829 if (FRAME_TERMCAP_P (it
->f
))
2830 valid_p
= STRINGP (value
);
2832 valid_p
= (STRINGP (value
)
2833 || (CONSP (value
) && EQ (XCAR (value
), Qspace
))
2834 || valid_image_p (value
));
2835 #else /* not HAVE_WINDOW_SYSTEM */
2836 valid_p
= STRINGP (value
);
2837 #endif /* not HAVE_WINDOW_SYSTEM */
2839 if ((EQ (location
, Qleft_margin
)
2840 || EQ (location
, Qright_margin
)
2844 space_or_image_found_p
= 1;
2846 /* Save current settings of IT so that we can restore them
2847 when we are finished with the glyph property value. */
2850 if (NILP (location
))
2851 it
->area
= TEXT_AREA
;
2852 else if (EQ (location
, Qleft_margin
))
2853 it
->area
= LEFT_MARGIN_AREA
;
2855 it
->area
= RIGHT_MARGIN_AREA
;
2857 if (STRINGP (value
))
2860 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
2861 it
->current
.overlay_string_index
= -1;
2862 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = 0;
2863 it
->end_charpos
= it
->string_nchars
2864 = XSTRING (it
->string
)->size
;
2865 it
->method
= next_element_from_string
;
2866 it
->stop_charpos
= 0;
2867 it
->string_from_display_prop_p
= 1;
2869 else if (CONSP (value
) && EQ (XCAR (value
), Qspace
))
2871 it
->method
= next_element_from_stretch
;
2873 it
->current
.pos
= it
->position
= start_pos
;
2875 #ifdef HAVE_WINDOW_SYSTEM
2878 it
->what
= IT_IMAGE
;
2879 it
->image_id
= lookup_image (it
->f
, value
);
2880 it
->position
= start_pos
;
2881 it
->object
= NILP (object
) ? it
->w
->buffer
: object
;
2882 it
->method
= next_element_from_image
;
2884 /* Say that we haven't consumed the characters with
2885 `display' property yet. The call to pop_it in
2886 set_iterator_to_next will clean this up. */
2887 *position
= start_pos
;
2889 #endif /* HAVE_WINDOW_SYSTEM */
2892 /* Invalid property or property not supported. Restore
2893 the position to what it was before. */
2894 *position
= start_pos
;
2897 return space_or_image_found_p
;
2901 /* Check if PROP is a display sub-property value whose text should be
2902 treated as intangible. */
2905 single_display_prop_intangible_p (prop
)
2908 /* Skip over `when FORM'. */
2909 if (CONSP (prop
) && EQ (XCAR (prop
), Qwhen
))
2920 /* Skip over `margin LOCATION'. If LOCATION is in the margins,
2921 we don't need to treat text as intangible. */
2922 if (EQ (XCAR (prop
), Qmargin
))
2930 || EQ (XCAR (prop
), Qleft_margin
)
2931 || EQ (XCAR (prop
), Qright_margin
))
2935 return CONSP (prop
) && EQ (XCAR (prop
), Qimage
);
2939 /* Check if PROP is a display property value whose text should be
2940 treated as intangible. */
2943 display_prop_intangible_p (prop
)
2947 && CONSP (XCAR (prop
))
2948 && !EQ (Qmargin
, XCAR (XCAR (prop
))))
2950 /* A list of sub-properties. */
2951 while (CONSP (prop
))
2953 if (single_display_prop_intangible_p (XCAR (prop
)))
2958 else if (VECTORP (prop
))
2960 /* A vector of sub-properties. */
2962 for (i
= 0; i
< XVECTOR (prop
)->size
; ++i
)
2963 if (single_display_prop_intangible_p (XVECTOR (prop
)->contents
[i
]))
2967 return single_display_prop_intangible_p (prop
);
2973 /***********************************************************************
2974 `composition' property
2975 ***********************************************************************/
2977 /* Set up iterator IT from `composition' property at its current
2978 position. Called from handle_stop. */
2980 static enum prop_handled
2981 handle_composition_prop (it
)
2984 Lisp_Object prop
, string
;
2985 int pos
, pos_byte
, end
;
2986 enum prop_handled handled
= HANDLED_NORMALLY
;
2988 if (STRINGP (it
->string
))
2990 pos
= IT_STRING_CHARPOS (*it
);
2991 pos_byte
= IT_STRING_BYTEPOS (*it
);
2992 string
= it
->string
;
2996 pos
= IT_CHARPOS (*it
);
2997 pos_byte
= IT_BYTEPOS (*it
);
3001 /* If there's a valid composition and point is not inside of the
3002 composition (in the case that the composition is from the current
3003 buffer), draw a glyph composed from the composition components. */
3004 if (find_composition (pos
, -1, &pos
, &end
, &prop
, string
)
3005 && COMPOSITION_VALID_P (pos
, end
, prop
)
3006 && (STRINGP (it
->string
) || (PT
<= pos
|| PT
>= end
)))
3008 int id
= get_composition_id (pos
, pos_byte
, end
- pos
, prop
, string
);
3012 it
->method
= next_element_from_composition
;
3014 it
->cmp_len
= COMPOSITION_LENGTH (prop
);
3015 /* For a terminal, draw only the first character of the
3017 it
->c
= COMPOSITION_GLYPH (composition_table
[id
], 0);
3018 it
->len
= (STRINGP (it
->string
)
3019 ? string_char_to_byte (it
->string
, end
)
3020 : CHAR_TO_BYTE (end
)) - pos_byte
;
3021 it
->stop_charpos
= end
;
3022 handled
= HANDLED_RETURN
;
3031 /***********************************************************************
3033 ***********************************************************************/
3035 /* The following structure is used to record overlay strings for
3036 later sorting in load_overlay_strings. */
3038 struct overlay_entry
3040 Lisp_Object overlay
;
3047 /* Set up iterator IT from overlay strings at its current position.
3048 Called from handle_stop. */
3050 static enum prop_handled
3051 handle_overlay_change (it
)
3054 if (!STRINGP (it
->string
) && get_overlay_strings (it
))
3055 return HANDLED_RECOMPUTE_PROPS
;
3057 return HANDLED_NORMALLY
;
3061 /* Set up the next overlay string for delivery by IT, if there is an
3062 overlay string to deliver. Called by set_iterator_to_next when the
3063 end of the current overlay string is reached. If there are more
3064 overlay strings to display, IT->string and
3065 IT->current.overlay_string_index are set appropriately here.
3066 Otherwise IT->string is set to nil. */
3069 next_overlay_string (it
)
3072 ++it
->current
.overlay_string_index
;
3073 if (it
->current
.overlay_string_index
== it
->n_overlay_strings
)
3075 /* No more overlay strings. Restore IT's settings to what
3076 they were before overlay strings were processed, and
3077 continue to deliver from current_buffer. */
3079 xassert (it
->stop_charpos
>= BEGV
3080 && it
->stop_charpos
<= it
->end_charpos
);
3082 it
->current
.overlay_string_index
= -1;
3083 SET_TEXT_POS (it
->current
.string_pos
, -1, -1);
3084 it
->n_overlay_strings
= 0;
3085 it
->method
= next_element_from_buffer
;
3087 /* If we're at the end of the buffer, record that we have
3088 processed the overlay strings there already, so that
3089 next_element_from_buffer doesn't try it again. */
3090 if (IT_CHARPOS (*it
) >= it
->end_charpos
)
3091 it
->overlay_strings_at_end_processed_p
= 1;
3095 /* There are more overlay strings to process. If
3096 IT->current.overlay_string_index has advanced to a position
3097 where we must load IT->overlay_strings with more strings, do
3099 int i
= it
->current
.overlay_string_index
% OVERLAY_STRING_CHUNK_SIZE
;
3101 if (it
->current
.overlay_string_index
&& i
== 0)
3102 load_overlay_strings (it
);
3104 /* Initialize IT to deliver display elements from the overlay
3106 it
->string
= it
->overlay_strings
[i
];
3107 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
3108 SET_TEXT_POS (it
->current
.string_pos
, 0, 0);
3109 it
->method
= next_element_from_string
;
3110 it
->stop_charpos
= 0;
3117 /* Compare two overlay_entry structures E1 and E2. Used as a
3118 comparison function for qsort in load_overlay_strings. Overlay
3119 strings for the same position are sorted so that
3121 1. All after-strings come in front of before-strings, except
3122 when they come from the same overlay.
3124 2. Within after-strings, strings are sorted so that overlay strings
3125 from overlays with higher priorities come first.
3127 2. Within before-strings, strings are sorted so that overlay
3128 strings from overlays with higher priorities come last.
3130 Value is analogous to strcmp. */
3134 compare_overlay_entries (e1
, e2
)
3137 struct overlay_entry
*entry1
= (struct overlay_entry
*) e1
;
3138 struct overlay_entry
*entry2
= (struct overlay_entry
*) e2
;
3141 if (entry1
->after_string_p
!= entry2
->after_string_p
)
3143 /* Let after-strings appear in front of before-strings if
3144 they come from different overlays. */
3145 if (EQ (entry1
->overlay
, entry2
->overlay
))
3146 result
= entry1
->after_string_p
? 1 : -1;
3148 result
= entry1
->after_string_p
? -1 : 1;
3150 else if (entry1
->after_string_p
)
3151 /* After-strings sorted in order of decreasing priority. */
3152 result
= entry2
->priority
- entry1
->priority
;
3154 /* Before-strings sorted in order of increasing priority. */
3155 result
= entry1
->priority
- entry2
->priority
;
3161 /* Load the vector IT->overlay_strings with overlay strings from IT's
3162 current buffer position. Set IT->n_overlays to the total number of
3163 overlay strings found.
3165 Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at
3166 a time. On entry into load_overlay_strings,
3167 IT->current.overlay_string_index gives the number of overlay
3168 strings that have already been loaded by previous calls to this
3171 IT->add_overlay_start contains an additional overlay start
3172 position to consider for taking overlay strings from, if non-zero.
3173 This position comes into play when the overlay has an `invisible'
3174 property, and both before and after-strings. When we've skipped to
3175 the end of the overlay, because of its `invisible' property, we
3176 nevertheless want its before-string to appear.
3177 IT->add_overlay_start will contain the overlay start position
3180 Overlay strings are sorted so that after-string strings come in
3181 front of before-string strings. Within before and after-strings,
3182 strings are sorted by overlay priority. See also function
3183 compare_overlay_entries. */
3186 load_overlay_strings (it
)
3189 extern Lisp_Object Qafter_string
, Qbefore_string
, Qwindow
, Qpriority
;
3190 Lisp_Object ov
, overlay
, window
, str
, invisible
;
3193 int n
= 0, i
, j
, invis_p
;
3194 struct overlay_entry
*entries
3195 = (struct overlay_entry
*) alloca (size
* sizeof *entries
);
3196 int charpos
= IT_CHARPOS (*it
);
3198 /* Append the overlay string STRING of overlay OVERLAY to vector
3199 `entries' which has size `size' and currently contains `n'
3200 elements. AFTER_P non-zero means STRING is an after-string of
3202 #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \
3205 Lisp_Object priority; \
3209 int new_size = 2 * size; \
3210 struct overlay_entry *old = entries; \
3212 (struct overlay_entry *) alloca (new_size \
3213 * sizeof *entries); \
3214 bcopy (old, entries, size * sizeof *entries); \
3218 entries[n].string = (STRING); \
3219 entries[n].overlay = (OVERLAY); \
3220 priority = Foverlay_get ((OVERLAY), Qpriority); \
3221 entries[n].priority = INTEGERP (priority) ? XINT (priority) : 0; \
3222 entries[n].after_string_p = (AFTER_P); \
3227 /* Process overlay before the overlay center. */
3228 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
3230 overlay
= XCAR (ov
);
3231 xassert (OVERLAYP (overlay
));
3232 start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3233 end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3238 /* Skip this overlay if it doesn't start or end at IT's current
3240 if (end
!= charpos
&& start
!= charpos
)
3243 /* Skip this overlay if it doesn't apply to IT->w. */
3244 window
= Foverlay_get (overlay
, Qwindow
);
3245 if (WINDOWP (window
) && XWINDOW (window
) != it
->w
)
3248 /* If the text ``under'' the overlay is invisible, both before-
3249 and after-strings from this overlay are visible; start and
3250 end position are indistinguishable. */
3251 invisible
= Foverlay_get (overlay
, Qinvisible
);
3252 invis_p
= TEXT_PROP_MEANS_INVISIBLE (invisible
);
3254 /* If overlay has a non-empty before-string, record it. */
3255 if ((start
== charpos
|| (end
== charpos
&& invis_p
))
3256 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
))
3257 && XSTRING (str
)->size
)
3258 RECORD_OVERLAY_STRING (overlay
, str
, 0);
3260 /* If overlay has a non-empty after-string, record it. */
3261 if ((end
== charpos
|| (start
== charpos
&& invis_p
))
3262 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
))
3263 && XSTRING (str
)->size
)
3264 RECORD_OVERLAY_STRING (overlay
, str
, 1);
3267 /* Process overlays after the overlay center. */
3268 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
3270 overlay
= XCAR (ov
);
3271 xassert (OVERLAYP (overlay
));
3272 start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3273 end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3275 if (start
> charpos
)
3278 /* Skip this overlay if it doesn't start or end at IT's current
3280 if (end
!= charpos
&& start
!= charpos
)
3283 /* Skip this overlay if it doesn't apply to IT->w. */
3284 window
= Foverlay_get (overlay
, Qwindow
);
3285 if (WINDOWP (window
) && XWINDOW (window
) != it
->w
)
3288 /* If the text ``under'' the overlay is invisible, it has a zero
3289 dimension, and both before- and after-strings apply. */
3290 invisible
= Foverlay_get (overlay
, Qinvisible
);
3291 invis_p
= TEXT_PROP_MEANS_INVISIBLE (invisible
);
3293 /* If overlay has a non-empty before-string, record it. */
3294 if ((start
== charpos
|| (end
== charpos
&& invis_p
))
3295 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
))
3296 && XSTRING (str
)->size
)
3297 RECORD_OVERLAY_STRING (overlay
, str
, 0);
3299 /* If overlay has a non-empty after-string, record it. */
3300 if ((end
== charpos
|| (start
== charpos
&& invis_p
))
3301 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
))
3302 && XSTRING (str
)->size
)
3303 RECORD_OVERLAY_STRING (overlay
, str
, 1);
3306 #undef RECORD_OVERLAY_STRING
3310 qsort (entries
, n
, sizeof *entries
, compare_overlay_entries
);
3312 /* Record the total number of strings to process. */
3313 it
->n_overlay_strings
= n
;
3315 /* IT->current.overlay_string_index is the number of overlay strings
3316 that have already been consumed by IT. Copy some of the
3317 remaining overlay strings to IT->overlay_strings. */
3319 j
= it
->current
.overlay_string_index
;
3320 while (i
< OVERLAY_STRING_CHUNK_SIZE
&& j
< n
)
3321 it
->overlay_strings
[i
++] = entries
[j
++].string
;
3327 /* Get the first chunk of overlay strings at IT's current buffer
3328 position. Value is non-zero if at least one overlay string was
3332 get_overlay_strings (it
)
3335 /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to
3336 process. This fills IT->overlay_strings with strings, and sets
3337 IT->n_overlay_strings to the total number of strings to process.
3338 IT->pos.overlay_string_index has to be set temporarily to zero
3339 because load_overlay_strings needs this; it must be set to -1
3340 when no overlay strings are found because a zero value would
3341 indicate a position in the first overlay string. */
3342 it
->current
.overlay_string_index
= 0;
3343 load_overlay_strings (it
);
3345 /* If we found overlay strings, set up IT to deliver display
3346 elements from the first one. Otherwise set up IT to deliver
3347 from current_buffer. */
3348 if (it
->n_overlay_strings
)
3350 /* Make sure we know settings in current_buffer, so that we can
3351 restore meaningful values when we're done with the overlay
3353 compute_stop_pos (it
);
3354 xassert (it
->face_id
>= 0);
3356 /* Save IT's settings. They are restored after all overlay
3357 strings have been processed. */
3358 xassert (it
->sp
== 0);
3361 /* Set up IT to deliver display elements from the first overlay
3363 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = 0;
3364 it
->stop_charpos
= 0;
3365 it
->string
= it
->overlay_strings
[0];
3366 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
3367 xassert (STRINGP (it
->string
));
3368 it
->method
= next_element_from_string
;
3373 it
->current
.overlay_string_index
= -1;
3374 it
->method
= next_element_from_buffer
;
3379 /* Value is non-zero if we found at least one overlay string. */
3380 return STRINGP (it
->string
);
3385 /***********************************************************************
3386 Saving and restoring state
3387 ***********************************************************************/
3389 /* Save current settings of IT on IT->stack. Called, for example,
3390 before setting up IT for an overlay string, to be able to restore
3391 IT's settings to what they were after the overlay string has been
3398 struct iterator_stack_entry
*p
;
3400 xassert (it
->sp
< 2);
3401 p
= it
->stack
+ it
->sp
;
3403 p
->stop_charpos
= it
->stop_charpos
;
3404 xassert (it
->face_id
>= 0);
3405 p
->face_id
= it
->face_id
;
3406 p
->string
= it
->string
;
3407 p
->pos
= it
->current
;
3408 p
->end_charpos
= it
->end_charpos
;
3409 p
->string_nchars
= it
->string_nchars
;
3411 p
->multibyte_p
= it
->multibyte_p
;
3412 p
->space_width
= it
->space_width
;
3413 p
->font_height
= it
->font_height
;
3414 p
->voffset
= it
->voffset
;
3415 p
->string_from_display_prop_p
= it
->string_from_display_prop_p
;
3420 /* Restore IT's settings from IT->stack. Called, for example, when no
3421 more overlay strings must be processed, and we return to delivering
3422 display elements from a buffer, or when the end of a string from a
3423 `display' property is reached and we return to delivering display
3424 elements from an overlay string, or from a buffer. */
3430 struct iterator_stack_entry
*p
;
3432 xassert (it
->sp
> 0);
3434 p
= it
->stack
+ it
->sp
;
3435 it
->stop_charpos
= p
->stop_charpos
;
3436 it
->face_id
= p
->face_id
;
3437 it
->string
= p
->string
;
3438 it
->current
= p
->pos
;
3439 it
->end_charpos
= p
->end_charpos
;
3440 it
->string_nchars
= p
->string_nchars
;
3442 it
->multibyte_p
= p
->multibyte_p
;
3443 it
->space_width
= p
->space_width
;
3444 it
->font_height
= p
->font_height
;
3445 it
->voffset
= p
->voffset
;
3446 it
->string_from_display_prop_p
= p
->string_from_display_prop_p
;
3451 /***********************************************************************
3453 ***********************************************************************/
3455 /* Set IT's current position to the previous line start. */
3458 back_to_previous_line_start (it
)
3461 IT_CHARPOS (*it
) = find_next_newline_no_quit (IT_CHARPOS (*it
) - 1, -1);
3462 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (IT_CHARPOS (*it
));
3466 /* Move IT to the next line start.
3468 Value is non-zero if a newline was found. Set *SKIPPED_P to 1 if
3469 we skipped over part of the text (as opposed to moving the iterator
3470 continuously over the text). Otherwise, don't change the value
3473 Newlines may come from buffer text, overlay strings, or strings
3474 displayed via the `display' property. That's the reason we can't
3475 simply use find_next_newline_no_quit.
3477 Note that this function may not skip over invisible text that is so
3478 because of text properties and immediately follows a newline. If
3479 it would, function reseat_at_next_visible_line_start, when called
3480 from set_iterator_to_next, would effectively make invisible
3481 characters following a newline part of the wrong glyph row, which
3482 leads to wrong cursor motion. */
3485 forward_to_next_line_start (it
, skipped_p
)
3489 int old_selective
, newline_found_p
, n
;
3490 const int MAX_NEWLINE_DISTANCE
= 500;
3492 /* If already on a newline, just consume it to avoid unintended
3493 skipping over invisible text below. */
3494 if (it
->what
== IT_CHARACTER
&& it
->c
== '\n')
3496 set_iterator_to_next (it
, 0);
3501 /* Don't handle selective display in the following. It's (a)
3502 unnecessary because it's done by the caller, and (b) leads to an
3503 infinite recursion because next_element_from_ellipsis indirectly
3504 calls this function. */
3505 old_selective
= it
->selective
;
3508 /* Scan for a newline within MAX_NEWLINE_DISTANCE display elements
3509 from buffer text. */
3510 for (n
= newline_found_p
= 0;
3511 !newline_found_p
&& n
< MAX_NEWLINE_DISTANCE
;
3512 n
+= STRINGP (it
->string
) ? 0 : 1)
3514 get_next_display_element (it
);
3515 newline_found_p
= it
->what
== IT_CHARACTER
&& it
->c
== '\n';
3516 set_iterator_to_next (it
, 0);
3519 /* If we didn't find a newline near enough, see if we can use a
3521 if (n
== MAX_NEWLINE_DISTANCE
)
3523 int start
= IT_CHARPOS (*it
);
3524 int limit
= find_next_newline_no_quit (start
, 1);
3527 xassert (!STRINGP (it
->string
));
3529 /* If there isn't any `display' property in sight, and no
3530 overlays, we can just use the position of the newline in
3532 if (it
->stop_charpos
>= limit
3533 || ((pos
= Fnext_single_property_change (make_number (start
),
3535 Qnil
, make_number (limit
)),
3537 && next_overlay_change (start
) == ZV
))
3539 IT_CHARPOS (*it
) = limit
;
3540 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (limit
);
3541 *skipped_p
= newline_found_p
= 1;
3545 while (get_next_display_element (it
)
3546 && !newline_found_p
)
3548 newline_found_p
= ITERATOR_AT_END_OF_LINE_P (it
);
3549 set_iterator_to_next (it
, 0);
3554 it
->selective
= old_selective
;
3555 xassert (!newline_found_p
|| FETCH_BYTE (IT_BYTEPOS (*it
) - 1) == '\n');
3556 return newline_found_p
;
3560 /* Set IT's current position to the previous visible line start. Skip
3561 invisible text that is so either due to text properties or due to
3562 selective display. Caution: this does not change IT->current_x and
3566 back_to_previous_visible_line_start (it
)
3571 /* Go back one newline if not on BEGV already. */
3572 if (IT_CHARPOS (*it
) > BEGV
)
3573 back_to_previous_line_start (it
);
3575 /* Move over lines that are invisible because of selective display
3576 or text properties. */
3577 while (IT_CHARPOS (*it
) > BEGV
3582 /* If selective > 0, then lines indented more than that values
3584 if (it
->selective
> 0
3585 && indented_beyond_p (IT_CHARPOS (*it
), IT_BYTEPOS (*it
),
3592 prop
= Fget_char_property (make_number (IT_CHARPOS (*it
)),
3593 Qinvisible
, it
->window
);
3594 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3598 /* Back one more newline if the current one is invisible. */
3600 back_to_previous_line_start (it
);
3603 xassert (IT_CHARPOS (*it
) >= BEGV
);
3604 xassert (IT_CHARPOS (*it
) == BEGV
3605 || FETCH_BYTE (IT_BYTEPOS (*it
) - 1) == '\n');
3610 /* Reseat iterator IT at the previous visible line start. Skip
3611 invisible text that is so either due to text properties or due to
3612 selective display. At the end, update IT's overlay information,
3613 face information etc. */
3616 reseat_at_previous_visible_line_start (it
)
3619 back_to_previous_visible_line_start (it
);
3620 reseat (it
, it
->current
.pos
, 1);
3625 /* Reseat iterator IT on the next visible line start in the current
3626 buffer. ON_NEWLINE_P non-zero means position IT on the newline
3627 preceding the line start. Skip over invisible text that is so
3628 because of selective display. Compute faces, overlays etc at the
3629 new position. Note that this function does not skip over text that
3630 is invisible because of text properties. */
3633 reseat_at_next_visible_line_start (it
, on_newline_p
)
3637 int newline_found_p
, skipped_p
= 0;
3639 newline_found_p
= forward_to_next_line_start (it
, &skipped_p
);
3641 /* Skip over lines that are invisible because they are indented
3642 more than the value of IT->selective. */
3643 if (it
->selective
> 0)
3644 while (IT_CHARPOS (*it
) < ZV
3645 && indented_beyond_p (IT_CHARPOS (*it
), IT_BYTEPOS (*it
),
3648 xassert (FETCH_BYTE (IT_BYTEPOS (*it
) - 1) == '\n');
3649 newline_found_p
= forward_to_next_line_start (it
, &skipped_p
);
3652 /* Position on the newline if that's what's requested. */
3653 if (on_newline_p
&& newline_found_p
)
3655 if (STRINGP (it
->string
))
3657 if (IT_STRING_CHARPOS (*it
) > 0)
3659 --IT_STRING_CHARPOS (*it
);
3660 --IT_STRING_BYTEPOS (*it
);
3663 else if (IT_CHARPOS (*it
) > BEGV
)
3667 reseat (it
, it
->current
.pos
, 0);
3671 reseat (it
, it
->current
.pos
, 0);
3678 /***********************************************************************
3679 Changing an iterator's position
3680 ***********************************************************************/
3682 /* Change IT's current position to POS in current_buffer. If FORCE_P
3683 is non-zero, always check for text properties at the new position.
3684 Otherwise, text properties are only looked up if POS >=
3685 IT->check_charpos of a property. */
3688 reseat (it
, pos
, force_p
)
3690 struct text_pos pos
;
3693 int original_pos
= IT_CHARPOS (*it
);
3695 reseat_1 (it
, pos
, 0);
3697 /* Determine where to check text properties. Avoid doing it
3698 where possible because text property lookup is very expensive. */
3700 || CHARPOS (pos
) > it
->stop_charpos
3701 || CHARPOS (pos
) < original_pos
)
3708 /* Change IT's buffer position to POS. SET_STOP_P non-zero means set
3709 IT->stop_pos to POS, also. */
3712 reseat_1 (it
, pos
, set_stop_p
)
3714 struct text_pos pos
;
3717 /* Don't call this function when scanning a C string. */
3718 xassert (it
->s
== NULL
);
3720 /* POS must be a reasonable value. */
3721 xassert (CHARPOS (pos
) >= BEGV
&& CHARPOS (pos
) <= ZV
);
3723 it
->current
.pos
= it
->position
= pos
;
3724 XSETBUFFER (it
->object
, current_buffer
);
3726 it
->current
.dpvec_index
= -1;
3727 it
->current
.overlay_string_index
= -1;
3728 IT_STRING_CHARPOS (*it
) = -1;
3729 IT_STRING_BYTEPOS (*it
) = -1;
3731 it
->method
= next_element_from_buffer
;
3733 it
->face_before_selective_p
= 0;
3736 it
->stop_charpos
= CHARPOS (pos
);
3740 /* Set up IT for displaying a string, starting at CHARPOS in window W.
3741 If S is non-null, it is a C string to iterate over. Otherwise,
3742 STRING gives a Lisp string to iterate over.
3744 If PRECISION > 0, don't return more then PRECISION number of
3745 characters from the string.
3747 If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH
3748 characters have been returned. FIELD_WIDTH < 0 means an infinite
3751 MULTIBYTE = 0 means disable processing of multibyte characters,
3752 MULTIBYTE > 0 means enable it,
3753 MULTIBYTE < 0 means use IT->multibyte_p.
3755 IT must be initialized via a prior call to init_iterator before
3756 calling this function. */
3759 reseat_to_string (it
, s
, string
, charpos
, precision
, field_width
, multibyte
)
3764 int precision
, field_width
, multibyte
;
3766 /* No region in strings. */
3767 it
->region_beg_charpos
= it
->region_end_charpos
= -1;
3769 /* No text property checks performed by default, but see below. */
3770 it
->stop_charpos
= -1;
3772 /* Set iterator position and end position. */
3773 bzero (&it
->current
, sizeof it
->current
);
3774 it
->current
.overlay_string_index
= -1;
3775 it
->current
.dpvec_index
= -1;
3776 xassert (charpos
>= 0);
3778 /* Use the setting of MULTIBYTE if specified. */
3780 it
->multibyte_p
= multibyte
> 0;
3784 xassert (STRINGP (string
));
3785 it
->string
= string
;
3787 it
->end_charpos
= it
->string_nchars
= XSTRING (string
)->size
;
3788 it
->method
= next_element_from_string
;
3789 it
->current
.string_pos
= string_pos (charpos
, string
);
3796 /* Note that we use IT->current.pos, not it->current.string_pos,
3797 for displaying C strings. */
3798 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = -1;
3799 if (it
->multibyte_p
)
3801 it
->current
.pos
= c_string_pos (charpos
, s
, 1);
3802 it
->end_charpos
= it
->string_nchars
= number_of_chars (s
, 1);
3806 IT_CHARPOS (*it
) = IT_BYTEPOS (*it
) = charpos
;
3807 it
->end_charpos
= it
->string_nchars
= strlen (s
);
3810 it
->method
= next_element_from_c_string
;
3813 /* PRECISION > 0 means don't return more than PRECISION characters
3815 if (precision
> 0 && it
->end_charpos
- charpos
> precision
)
3816 it
->end_charpos
= it
->string_nchars
= charpos
+ precision
;
3818 /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH
3819 characters have been returned. FIELD_WIDTH == 0 means don't pad,
3820 FIELD_WIDTH < 0 means infinite field width. This is useful for
3821 padding with `-' at the end of a mode line. */
3822 if (field_width
< 0)
3823 field_width
= INFINITY
;
3824 if (field_width
> it
->end_charpos
- charpos
)
3825 it
->end_charpos
= charpos
+ field_width
;
3827 /* Use the standard display table for displaying strings. */
3828 if (DISP_TABLE_P (Vstandard_display_table
))
3829 it
->dp
= XCHAR_TABLE (Vstandard_display_table
);
3831 it
->stop_charpos
= charpos
;
3837 /***********************************************************************
3839 ***********************************************************************/
3841 /* Load IT's display element fields with information about the next
3842 display element from the current position of IT. Value is zero if
3843 end of buffer (or C string) is reached. */
3846 get_next_display_element (it
)
3849 /* Non-zero means that we found an display element. Zero means that
3850 we hit the end of what we iterate over. Performance note: the
3851 function pointer `method' used here turns out to be faster than
3852 using a sequence of if-statements. */
3853 int success_p
= (*it
->method
) (it
);
3855 if (it
->what
== IT_CHARACTER
)
3857 /* Map via display table or translate control characters.
3858 IT->c, IT->len etc. have been set to the next character by
3859 the function call above. If we have a display table, and it
3860 contains an entry for IT->c, translate it. Don't do this if
3861 IT->c itself comes from a display table, otherwise we could
3862 end up in an infinite recursion. (An alternative could be to
3863 count the recursion depth of this function and signal an
3864 error when a certain maximum depth is reached.) Is it worth
3866 if (success_p
&& it
->dpvec
== NULL
)
3871 && (dv
= DISP_CHAR_VECTOR (it
->dp
, it
->c
),
3874 struct Lisp_Vector
*v
= XVECTOR (dv
);
3876 /* Return the first character from the display table
3877 entry, if not empty. If empty, don't display the
3878 current character. */
3881 it
->dpvec_char_len
= it
->len
;
3882 it
->dpvec
= v
->contents
;
3883 it
->dpend
= v
->contents
+ v
->size
;
3884 it
->current
.dpvec_index
= 0;
3885 it
->method
= next_element_from_display_vector
;
3888 success_p
= get_next_display_element (it
);
3891 /* Translate control characters into `\003' or `^C' form.
3892 Control characters coming from a display table entry are
3893 currently not translated because we use IT->dpvec to hold
3894 the translation. This could easily be changed but I
3895 don't believe that it is worth doing.
3897 Non-printable multibyte characters are also translated
3899 else if ((it
->c
< ' '
3900 && (it
->area
!= TEXT_AREA
3901 || (it
->c
!= '\n' && it
->c
!= '\t')))
3904 || !CHAR_PRINTABLE_P (it
->c
))
3906 /* IT->c is a control character which must be displayed
3907 either as '\003' or as `^C' where the '\\' and '^'
3908 can be defined in the display table. Fill
3909 IT->ctl_chars with glyphs for what we have to
3910 display. Then, set IT->dpvec to these glyphs. */
3913 if (it
->c
< 128 && it
->ctl_arrow_p
)
3915 /* Set IT->ctl_chars[0] to the glyph for `^'. */
3917 && INTEGERP (DISP_CTRL_GLYPH (it
->dp
))
3918 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it
->dp
))))
3919 g
= XINT (DISP_CTRL_GLYPH (it
->dp
));
3921 g
= FAST_MAKE_GLYPH ('^', 0);
3922 XSETINT (it
->ctl_chars
[0], g
);
3924 g
= FAST_MAKE_GLYPH (it
->c
^ 0100, 0);
3925 XSETINT (it
->ctl_chars
[1], g
);
3927 /* Set up IT->dpvec and return first character from it. */
3928 it
->dpvec_char_len
= it
->len
;
3929 it
->dpvec
= it
->ctl_chars
;
3930 it
->dpend
= it
->dpvec
+ 2;
3931 it
->current
.dpvec_index
= 0;
3932 it
->method
= next_element_from_display_vector
;
3933 get_next_display_element (it
);
3937 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
3942 /* Set IT->ctl_chars[0] to the glyph for `\\'. */
3944 && INTEGERP (DISP_ESCAPE_GLYPH (it
->dp
))
3945 && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it
->dp
))))
3946 escape_glyph
= XFASTINT (DISP_ESCAPE_GLYPH (it
->dp
));
3948 escape_glyph
= FAST_MAKE_GLYPH ('\\', 0);
3950 if (SINGLE_BYTE_CHAR_P (it
->c
))
3951 str
[0] = it
->c
, len
= 1;
3953 len
= CHAR_STRING (it
->c
, str
);
3955 for (i
= 0; i
< len
; i
++)
3957 XSETINT (it
->ctl_chars
[i
* 4], escape_glyph
);
3958 /* Insert three more glyphs into IT->ctl_chars for
3959 the octal display of the character. */
3960 g
= FAST_MAKE_GLYPH (((str
[i
] >> 6) & 7) + '0', 0);
3961 XSETINT (it
->ctl_chars
[i
* 4 + 1], g
);
3962 g
= FAST_MAKE_GLYPH (((str
[i
] >> 3) & 7) + '0', 0);
3963 XSETINT (it
->ctl_chars
[i
* 4 + 2], g
);
3964 g
= FAST_MAKE_GLYPH ((str
[i
] & 7) + '0', 0);
3965 XSETINT (it
->ctl_chars
[i
* 4 + 3], g
);
3968 /* Set up IT->dpvec and return the first character
3970 it
->dpvec_char_len
= it
->len
;
3971 it
->dpvec
= it
->ctl_chars
;
3972 it
->dpend
= it
->dpvec
+ len
* 4;
3973 it
->current
.dpvec_index
= 0;
3974 it
->method
= next_element_from_display_vector
;
3975 get_next_display_element (it
);
3980 /* Adjust face id for a multibyte character. There are no
3981 multibyte character in unibyte text. */
3984 && FRAME_WINDOW_P (it
->f
))
3986 struct face
*face
= FACE_FROM_ID (it
->f
, it
->face_id
);
3987 it
->face_id
= FACE_FOR_CHAR (it
->f
, face
, it
->c
);
3991 /* Is this character the last one of a run of characters with
3992 box? If yes, set IT->end_of_box_run_p to 1. */
3999 it
->end_of_box_run_p
4000 = ((face_id
= face_after_it_pos (it
),
4001 face_id
!= it
->face_id
)
4002 && (face
= FACE_FROM_ID (it
->f
, face_id
),
4003 face
->box
== FACE_NO_BOX
));
4006 /* Value is 0 if end of buffer or string reached. */
4011 /* Move IT to the next display element.
4013 RESEAT_P non-zero means if called on a newline in buffer text,
4014 skip to the next visible line start.
4016 Functions get_next_display_element and set_iterator_to_next are
4017 separate because I find this arrangement easier to handle than a
4018 get_next_display_element function that also increments IT's
4019 position. The way it is we can first look at an iterator's current
4020 display element, decide whether it fits on a line, and if it does,
4021 increment the iterator position. The other way around we probably
4022 would either need a flag indicating whether the iterator has to be
4023 incremented the next time, or we would have to implement a
4024 decrement position function which would not be easy to write. */
4027 set_iterator_to_next (it
, reseat_p
)
4031 /* Reset flags indicating start and end of a sequence of characters
4032 with box. Reset them at the start of this function because
4033 moving the iterator to a new position might set them. */
4034 it
->start_of_box_run_p
= it
->end_of_box_run_p
= 0;
4036 if (it
->method
== next_element_from_buffer
)
4038 /* The current display element of IT is a character from
4039 current_buffer. Advance in the buffer, and maybe skip over
4040 invisible lines that are so because of selective display. */
4041 if (ITERATOR_AT_END_OF_LINE_P (it
) && reseat_p
)
4042 reseat_at_next_visible_line_start (it
, 0);
4045 xassert (it
->len
!= 0);
4046 IT_BYTEPOS (*it
) += it
->len
;
4047 IT_CHARPOS (*it
) += 1;
4048 xassert (IT_BYTEPOS (*it
) == CHAR_TO_BYTE (IT_CHARPOS (*it
)));
4051 else if (it
->method
== next_element_from_composition
)
4053 xassert (it
->cmp_id
>= 0 && it
->cmp_id
< n_compositions
);
4054 if (STRINGP (it
->string
))
4056 IT_STRING_BYTEPOS (*it
) += it
->len
;
4057 IT_STRING_CHARPOS (*it
) += it
->cmp_len
;
4058 it
->method
= next_element_from_string
;
4059 goto consider_string_end
;
4063 IT_BYTEPOS (*it
) += it
->len
;
4064 IT_CHARPOS (*it
) += it
->cmp_len
;
4065 it
->method
= next_element_from_buffer
;
4068 else if (it
->method
== next_element_from_c_string
)
4070 /* Current display element of IT is from a C string. */
4071 IT_BYTEPOS (*it
) += it
->len
;
4072 IT_CHARPOS (*it
) += 1;
4074 else if (it
->method
== next_element_from_display_vector
)
4076 /* Current display element of IT is from a display table entry.
4077 Advance in the display table definition. Reset it to null if
4078 end reached, and continue with characters from buffers/
4080 ++it
->current
.dpvec_index
;
4082 /* Restore face of the iterator to what they were before the
4083 display vector entry (these entries may contain faces). */
4084 it
->face_id
= it
->saved_face_id
;
4086 if (it
->dpvec
+ it
->current
.dpvec_index
== it
->dpend
)
4089 it
->method
= next_element_from_c_string
;
4090 else if (STRINGP (it
->string
))
4091 it
->method
= next_element_from_string
;
4093 it
->method
= next_element_from_buffer
;
4096 it
->current
.dpvec_index
= -1;
4098 /* Skip over characters which were displayed via IT->dpvec. */
4099 if (it
->dpvec_char_len
< 0)
4100 reseat_at_next_visible_line_start (it
, 1);
4101 else if (it
->dpvec_char_len
> 0)
4103 it
->len
= it
->dpvec_char_len
;
4104 set_iterator_to_next (it
, reseat_p
);
4108 else if (it
->method
== next_element_from_string
)
4110 /* Current display element is a character from a Lisp string. */
4111 xassert (it
->s
== NULL
&& STRINGP (it
->string
));
4112 IT_STRING_BYTEPOS (*it
) += it
->len
;
4113 IT_STRING_CHARPOS (*it
) += 1;
4115 consider_string_end
:
4117 if (it
->current
.overlay_string_index
>= 0)
4119 /* IT->string is an overlay string. Advance to the
4120 next, if there is one. */
4121 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
)
4122 next_overlay_string (it
);
4126 /* IT->string is not an overlay string. If we reached
4127 its end, and there is something on IT->stack, proceed
4128 with what is on the stack. This can be either another
4129 string, this time an overlay string, or a buffer. */
4130 if (IT_STRING_CHARPOS (*it
) == XSTRING (it
->string
)->size
4134 if (!STRINGP (it
->string
))
4135 it
->method
= next_element_from_buffer
;
4139 else if (it
->method
== next_element_from_image
4140 || it
->method
== next_element_from_stretch
)
4142 /* The position etc with which we have to proceed are on
4143 the stack. The position may be at the end of a string,
4144 if the `display' property takes up the whole string. */
4147 if (STRINGP (it
->string
))
4149 it
->method
= next_element_from_string
;
4150 goto consider_string_end
;
4153 it
->method
= next_element_from_buffer
;
4156 /* There are no other methods defined, so this should be a bug. */
4159 xassert (it
->method
!= next_element_from_string
4160 || (STRINGP (it
->string
)
4161 && IT_STRING_CHARPOS (*it
) >= 0));
4165 /* Load IT's display element fields with information about the next
4166 display element which comes from a display table entry or from the
4167 result of translating a control character to one of the forms `^C'
4168 or `\003'. IT->dpvec holds the glyphs to return as characters. */
4171 next_element_from_display_vector (it
)
4175 xassert (it
->dpvec
&& it
->current
.dpvec_index
>= 0);
4177 /* Remember the current face id in case glyphs specify faces.
4178 IT's face is restored in set_iterator_to_next. */
4179 it
->saved_face_id
= it
->face_id
;
4181 if (INTEGERP (*it
->dpvec
)
4182 && GLYPH_CHAR_VALID_P (XFASTINT (*it
->dpvec
)))
4187 g
= XFASTINT (it
->dpvec
[it
->current
.dpvec_index
]);
4188 it
->c
= FAST_GLYPH_CHAR (g
);
4189 it
->len
= CHAR_BYTES (it
->c
);
4191 /* The entry may contain a face id to use. Such a face id is
4192 the id of a Lisp face, not a realized face. A face id of
4193 zero means no face is specified. */
4194 lface_id
= FAST_GLYPH_FACE (g
);
4197 /* The function returns -1 if lface_id is invalid. */
4198 int face_id
= ascii_face_of_lisp_face (it
->f
, lface_id
);
4200 it
->face_id
= face_id
;
4204 /* Display table entry is invalid. Return a space. */
4205 it
->c
= ' ', it
->len
= 1;
4207 /* Don't change position and object of the iterator here. They are
4208 still the values of the character that had this display table
4209 entry or was translated, and that's what we want. */
4210 it
->what
= IT_CHARACTER
;
4215 /* Load IT with the next display element from Lisp string IT->string.
4216 IT->current.string_pos is the current position within the string.
4217 If IT->current.overlay_string_index >= 0, the Lisp string is an
4221 next_element_from_string (it
)
4224 struct text_pos position
;
4226 xassert (STRINGP (it
->string
));
4227 xassert (IT_STRING_CHARPOS (*it
) >= 0);
4228 position
= it
->current
.string_pos
;
4230 /* Time to check for invisible text? */
4231 if (IT_STRING_CHARPOS (*it
) < it
->end_charpos
4232 && IT_STRING_CHARPOS (*it
) == it
->stop_charpos
)
4236 /* Since a handler may have changed IT->method, we must
4238 return get_next_display_element (it
);
4241 if (it
->current
.overlay_string_index
>= 0)
4243 /* Get the next character from an overlay string. In overlay
4244 strings, There is no field width or padding with spaces to
4246 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
)
4251 else if (STRING_MULTIBYTE (it
->string
))
4253 int remaining
= (STRING_BYTES (XSTRING (it
->string
))
4254 - IT_STRING_BYTEPOS (*it
));
4255 unsigned char *s
= (XSTRING (it
->string
)->data
4256 + IT_STRING_BYTEPOS (*it
));
4257 it
->c
= string_char_and_length (s
, remaining
, &it
->len
);
4261 it
->c
= XSTRING (it
->string
)->data
[IT_STRING_BYTEPOS (*it
)];
4267 /* Get the next character from a Lisp string that is not an
4268 overlay string. Such strings come from the mode line, for
4269 example. We may have to pad with spaces, or truncate the
4270 string. See also next_element_from_c_string. */
4271 if (IT_STRING_CHARPOS (*it
) >= it
->end_charpos
)
4276 else if (IT_STRING_CHARPOS (*it
) >= it
->string_nchars
)
4278 /* Pad with spaces. */
4279 it
->c
= ' ', it
->len
= 1;
4280 CHARPOS (position
) = BYTEPOS (position
) = -1;
4282 else if (STRING_MULTIBYTE (it
->string
))
4284 int maxlen
= (STRING_BYTES (XSTRING (it
->string
))
4285 - IT_STRING_BYTEPOS (*it
));
4286 unsigned char *s
= (XSTRING (it
->string
)->data
4287 + IT_STRING_BYTEPOS (*it
));
4288 it
->c
= string_char_and_length (s
, maxlen
, &it
->len
);
4292 it
->c
= XSTRING (it
->string
)->data
[IT_STRING_BYTEPOS (*it
)];
4297 /* Record what we have and where it came from. Note that we store a
4298 buffer position in IT->position although it could arguably be a
4300 it
->what
= IT_CHARACTER
;
4301 it
->object
= it
->string
;
4302 it
->position
= position
;
4307 /* Load IT with next display element from C string IT->s.
4308 IT->string_nchars is the maximum number of characters to return
4309 from the string. IT->end_charpos may be greater than
4310 IT->string_nchars when this function is called, in which case we
4311 may have to return padding spaces. Value is zero if end of string
4312 reached, including padding spaces. */
4315 next_element_from_c_string (it
)
4321 it
->what
= IT_CHARACTER
;
4322 BYTEPOS (it
->position
) = CHARPOS (it
->position
) = 0;
4325 /* IT's position can be greater IT->string_nchars in case a field
4326 width or precision has been specified when the iterator was
4328 if (IT_CHARPOS (*it
) >= it
->end_charpos
)
4330 /* End of the game. */
4334 else if (IT_CHARPOS (*it
) >= it
->string_nchars
)
4336 /* Pad with spaces. */
4337 it
->c
= ' ', it
->len
= 1;
4338 BYTEPOS (it
->position
) = CHARPOS (it
->position
) = -1;
4340 else if (it
->multibyte_p
)
4342 /* Implementation note: The calls to strlen apparently aren't a
4343 performance problem because there is no noticeable performance
4344 difference between Emacs running in unibyte or multibyte mode. */
4345 int maxlen
= strlen (it
->s
) - IT_BYTEPOS (*it
);
4346 it
->c
= string_char_and_length (it
->s
+ IT_BYTEPOS (*it
),
4350 it
->c
= it
->s
[IT_BYTEPOS (*it
)], it
->len
= 1;
4356 /* Set up IT to return characters from an ellipsis, if appropriate.
4357 The definition of the ellipsis glyphs may come from a display table
4358 entry. This function Fills IT with the first glyph from the
4359 ellipsis if an ellipsis is to be displayed. */
4362 next_element_from_ellipsis (it
)
4365 if (it
->selective_display_ellipsis_p
)
4367 if (it
->dp
&& VECTORP (DISP_INVIS_VECTOR (it
->dp
)))
4369 /* Use the display table definition for `...'. Invalid glyphs
4370 will be handled by the method returning elements from dpvec. */
4371 struct Lisp_Vector
*v
= XVECTOR (DISP_INVIS_VECTOR (it
->dp
));
4372 it
->dpvec_char_len
= it
->len
;
4373 it
->dpvec
= v
->contents
;
4374 it
->dpend
= v
->contents
+ v
->size
;
4375 it
->current
.dpvec_index
= 0;
4376 it
->method
= next_element_from_display_vector
;
4380 /* Use default `...' which is stored in default_invis_vector. */
4381 it
->dpvec_char_len
= it
->len
;
4382 it
->dpvec
= default_invis_vector
;
4383 it
->dpend
= default_invis_vector
+ 3;
4384 it
->current
.dpvec_index
= 0;
4385 it
->method
= next_element_from_display_vector
;
4390 /* The face at the current position may be different from the
4391 face we find after the invisible text. Remember what it
4392 was in IT->saved_face_id, and signal that it's there by
4393 setting face_before_selective_p. */
4394 it
->saved_face_id
= it
->face_id
;
4395 it
->method
= next_element_from_buffer
;
4396 reseat_at_next_visible_line_start (it
, 1);
4397 it
->face_before_selective_p
= 1;
4400 return get_next_display_element (it
);
4404 /* Deliver an image display element. The iterator IT is already
4405 filled with image information (done in handle_display_prop). Value
4410 next_element_from_image (it
)
4413 it
->what
= IT_IMAGE
;
4418 /* Fill iterator IT with next display element from a stretch glyph
4419 property. IT->object is the value of the text property. Value is
4423 next_element_from_stretch (it
)
4426 it
->what
= IT_STRETCH
;
4431 /* Load IT with the next display element from current_buffer. Value
4432 is zero if end of buffer reached. IT->stop_charpos is the next
4433 position at which to stop and check for text properties or buffer
4437 next_element_from_buffer (it
)
4442 /* Check this assumption, otherwise, we would never enter the
4443 if-statement, below. */
4444 xassert (IT_CHARPOS (*it
) >= BEGV
4445 && IT_CHARPOS (*it
) <= it
->stop_charpos
);
4447 if (IT_CHARPOS (*it
) >= it
->stop_charpos
)
4449 if (IT_CHARPOS (*it
) >= it
->end_charpos
)
4451 int overlay_strings_follow_p
;
4453 /* End of the game, except when overlay strings follow that
4454 haven't been returned yet. */
4455 if (it
->overlay_strings_at_end_processed_p
)
4456 overlay_strings_follow_p
= 0;
4459 it
->overlay_strings_at_end_processed_p
= 1;
4460 overlay_strings_follow_p
= get_overlay_strings (it
);
4463 if (overlay_strings_follow_p
)
4464 success_p
= get_next_display_element (it
);
4468 it
->position
= it
->current
.pos
;
4475 return get_next_display_element (it
);
4480 /* No face changes, overlays etc. in sight, so just return a
4481 character from current_buffer. */
4484 /* Maybe run the redisplay end trigger hook. Performance note:
4485 This doesn't seem to cost measurable time. */
4486 if (it
->redisplay_end_trigger_charpos
4488 && IT_CHARPOS (*it
) >= it
->redisplay_end_trigger_charpos
)
4489 run_redisplay_end_trigger_hook (it
);
4491 /* Get the next character, maybe multibyte. */
4492 p
= BYTE_POS_ADDR (IT_BYTEPOS (*it
));
4493 if (it
->multibyte_p
&& !ASCII_BYTE_P (*p
))
4495 int maxlen
= ((IT_BYTEPOS (*it
) >= GPT_BYTE
? ZV_BYTE
: GPT_BYTE
)
4496 - IT_BYTEPOS (*it
));
4497 it
->c
= string_char_and_length (p
, maxlen
, &it
->len
);
4500 it
->c
= *p
, it
->len
= 1;
4502 /* Record what we have and where it came from. */
4503 it
->what
= IT_CHARACTER
;;
4504 it
->object
= it
->w
->buffer
;
4505 it
->position
= it
->current
.pos
;
4507 /* Normally we return the character found above, except when we
4508 really want to return an ellipsis for selective display. */
4513 /* A value of selective > 0 means hide lines indented more
4514 than that number of columns. */
4515 if (it
->selective
> 0
4516 && IT_CHARPOS (*it
) + 1 < ZV
4517 && indented_beyond_p (IT_CHARPOS (*it
) + 1,
4518 IT_BYTEPOS (*it
) + 1,
4521 success_p
= next_element_from_ellipsis (it
);
4522 it
->dpvec_char_len
= -1;
4525 else if (it
->c
== '\r' && it
->selective
== -1)
4527 /* A value of selective == -1 means that everything from the
4528 CR to the end of the line is invisible, with maybe an
4529 ellipsis displayed for it. */
4530 success_p
= next_element_from_ellipsis (it
);
4531 it
->dpvec_char_len
= -1;
4536 /* Value is zero if end of buffer reached. */
4537 xassert (!success_p
|| it
->what
!= IT_CHARACTER
|| it
->len
> 0);
4542 /* Run the redisplay end trigger hook for IT. */
4545 run_redisplay_end_trigger_hook (it
)
4548 Lisp_Object args
[3];
4550 /* IT->glyph_row should be non-null, i.e. we should be actually
4551 displaying something, or otherwise we should not run the hook. */
4552 xassert (it
->glyph_row
);
4554 /* Set up hook arguments. */
4555 args
[0] = Qredisplay_end_trigger_functions
;
4556 args
[1] = it
->window
;
4557 XSETINT (args
[2], it
->redisplay_end_trigger_charpos
);
4558 it
->redisplay_end_trigger_charpos
= 0;
4560 /* Since we are *trying* to run these functions, don't try to run
4561 them again, even if they get an error. */
4562 it
->w
->redisplay_end_trigger
= Qnil
;
4563 Frun_hook_with_args (3, args
);
4565 /* Notice if it changed the face of the character we are on. */
4566 handle_face_prop (it
);
4570 /* Deliver a composition display element. The iterator IT is already
4571 filled with composition information (done in
4572 handle_composition_prop). Value is always 1. */
4575 next_element_from_composition (it
)
4578 it
->what
= IT_COMPOSITION
;
4579 it
->position
= (STRINGP (it
->string
)
4580 ? it
->current
.string_pos
4587 /***********************************************************************
4588 Moving an iterator without producing glyphs
4589 ***********************************************************************/
4591 /* Move iterator IT to a specified buffer or X position within one
4592 line on the display without producing glyphs.
4594 Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X
4595 whichever is reached first.
4597 TO_CHARPOS <= 0 means no TO_CHARPOS is specified.
4599 TO_X < 0 means that no TO_X is specified. TO_X is normally a value
4600 0 <= TO_X <= IT->last_visible_x. This means in particular, that
4601 TO_X includes the amount by which a window is horizontally
4606 MOVE_POS_MATCH_OR_ZV
4607 - when TO_POS or ZV was reached.
4610 -when TO_X was reached before TO_POS or ZV were reached.
4613 - when we reached the end of the display area and the line must
4617 - when we reached the end of the display area and the line is
4621 - when we stopped at a line end, i.e. a newline or a CR and selective
4624 static enum move_it_result
4625 move_it_in_display_line_to (it
, to_charpos
, to_x
, op
)
4627 int to_charpos
, to_x
, op
;
4629 enum move_it_result result
= MOVE_UNDEFINED
;
4630 struct glyph_row
*saved_glyph_row
;
4632 /* Don't produce glyphs in produce_glyphs. */
4633 saved_glyph_row
= it
->glyph_row
;
4634 it
->glyph_row
= NULL
;
4638 int x
, i
, ascent
= 0, descent
= 0;
4640 /* Stop when ZV or TO_CHARPOS reached. */
4641 if (!get_next_display_element (it
)
4642 || ((op
& MOVE_TO_POS
) != 0
4643 && BUFFERP (it
->object
)
4644 && IT_CHARPOS (*it
) >= to_charpos
))
4646 result
= MOVE_POS_MATCH_OR_ZV
;
4650 /* The call to produce_glyphs will get the metrics of the
4651 display element IT is loaded with. We record in x the
4652 x-position before this display element in case it does not
4656 /* Remember the line height so far in case the next element doesn't
4658 if (!it
->truncate_lines_p
)
4660 ascent
= it
->max_ascent
;
4661 descent
= it
->max_descent
;
4664 PRODUCE_GLYPHS (it
);
4666 if (it
->area
!= TEXT_AREA
)
4668 set_iterator_to_next (it
, 1);
4672 /* The number of glyphs we get back in IT->nglyphs will normally
4673 be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph
4674 character on a terminal frame, or (iii) a line end. For the
4675 second case, IT->nglyphs - 1 padding glyphs will be present
4676 (on X frames, there is only one glyph produced for a
4677 composite character.
4679 The behavior implemented below means, for continuation lines,
4680 that as many spaces of a TAB as fit on the current line are
4681 displayed there. For terminal frames, as many glyphs of a
4682 multi-glyph character are displayed in the current line, too.
4683 This is what the old redisplay code did, and we keep it that
4684 way. Under X, the whole shape of a complex character must
4685 fit on the line or it will be completely displayed in the
4688 Note that both for tabs and padding glyphs, all glyphs have
4692 /* More than one glyph or glyph doesn't fit on line. All
4693 glyphs have the same width. */
4694 int single_glyph_width
= it
->pixel_width
/ it
->nglyphs
;
4697 for (i
= 0; i
< it
->nglyphs
; ++i
, x
= new_x
)
4699 new_x
= x
+ single_glyph_width
;
4701 /* We want to leave anything reaching TO_X to the caller. */
4702 if ((op
& MOVE_TO_X
) && new_x
> to_x
)
4705 result
= MOVE_X_REACHED
;
4708 else if (/* Lines are continued. */
4709 !it
->truncate_lines_p
4710 && (/* And glyph doesn't fit on the line. */
4711 new_x
> it
->last_visible_x
4712 /* Or it fits exactly and we're on a window
4714 || (new_x
== it
->last_visible_x
4715 && FRAME_WINDOW_P (it
->f
))))
4717 if (/* IT->hpos == 0 means the very first glyph
4718 doesn't fit on the line, e.g. a wide image. */
4720 || (new_x
== it
->last_visible_x
4721 && FRAME_WINDOW_P (it
->f
)))
4724 it
->current_x
= new_x
;
4725 if (i
== it
->nglyphs
- 1)
4726 set_iterator_to_next (it
, 1);
4731 it
->max_ascent
= ascent
;
4732 it
->max_descent
= descent
;
4735 TRACE_MOVE ((stderr
, "move_it_in: continued at %d\n",
4737 result
= MOVE_LINE_CONTINUED
;
4740 else if (new_x
> it
->first_visible_x
)
4742 /* Glyph is visible. Increment number of glyphs that
4743 would be displayed. */
4748 /* Glyph is completely off the left margin of the display
4749 area. Nothing to do. */
4753 if (result
!= MOVE_UNDEFINED
)
4756 else if ((op
& MOVE_TO_X
) && it
->current_x
>= to_x
)
4758 /* Stop when TO_X specified and reached. This check is
4759 necessary here because of lines consisting of a line end,
4760 only. The line end will not produce any glyphs and we
4761 would never get MOVE_X_REACHED. */
4762 xassert (it
->nglyphs
== 0);
4763 result
= MOVE_X_REACHED
;
4767 /* Is this a line end? If yes, we're done. */
4768 if (ITERATOR_AT_END_OF_LINE_P (it
))
4770 result
= MOVE_NEWLINE_OR_CR
;
4774 /* The current display element has been consumed. Advance
4776 set_iterator_to_next (it
, 1);
4778 /* Stop if lines are truncated and IT's current x-position is
4779 past the right edge of the window now. */
4780 if (it
->truncate_lines_p
4781 && it
->current_x
>= it
->last_visible_x
)
4783 result
= MOVE_LINE_TRUNCATED
;
4788 /* Restore the iterator settings altered at the beginning of this
4790 it
->glyph_row
= saved_glyph_row
;
4795 /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X,
4796 TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See
4797 the description of enum move_operation_enum.
4799 If TO_CHARPOS is in invisible text, e.g. a truncated part of a
4800 screen line, this function will set IT to the next position >
4804 move_it_to (it
, to_charpos
, to_x
, to_y
, to_vpos
, op
)
4806 int to_charpos
, to_x
, to_y
, to_vpos
;
4809 enum move_it_result skip
, skip2
= MOVE_X_REACHED
;
4815 if (op
& MOVE_TO_VPOS
)
4817 /* If no TO_CHARPOS and no TO_X specified, stop at the
4818 start of the line TO_VPOS. */
4819 if ((op
& (MOVE_TO_X
| MOVE_TO_POS
)) == 0)
4821 if (it
->vpos
== to_vpos
)
4827 skip
= move_it_in_display_line_to (it
, -1, -1, 0);
4831 /* TO_VPOS >= 0 means stop at TO_X in the line at
4832 TO_VPOS, or at TO_POS, whichever comes first. */
4833 if (it
->vpos
== to_vpos
)
4839 skip
= move_it_in_display_line_to (it
, to_charpos
, to_x
, op
);
4841 if (skip
== MOVE_POS_MATCH_OR_ZV
|| it
->vpos
== to_vpos
)
4846 else if (skip
== MOVE_X_REACHED
&& it
->vpos
!= to_vpos
)
4848 /* We have reached TO_X but not in the line we want. */
4849 skip
= move_it_in_display_line_to (it
, to_charpos
,
4851 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4859 else if (op
& MOVE_TO_Y
)
4861 struct it it_backup
;
4863 /* TO_Y specified means stop at TO_X in the line containing
4864 TO_Y---or at TO_CHARPOS if this is reached first. The
4865 problem is that we can't really tell whether the line
4866 contains TO_Y before we have completely scanned it, and
4867 this may skip past TO_X. What we do is to first scan to
4870 If TO_X is not specified, use a TO_X of zero. The reason
4871 is to make the outcome of this function more predictable.
4872 If we didn't use TO_X == 0, we would stop at the end of
4873 the line which is probably not what a caller would expect
4875 skip
= move_it_in_display_line_to (it
, to_charpos
,
4879 | (op
& MOVE_TO_POS
)));
4881 /* If TO_CHARPOS is reached or ZV, we don't have to do more. */
4882 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4888 /* If TO_X was reached, we would like to know whether TO_Y
4889 is in the line. This can only be said if we know the
4890 total line height which requires us to scan the rest of
4892 if (skip
== MOVE_X_REACHED
)
4895 TRACE_MOVE ((stderr
, "move_it: from %d\n", IT_CHARPOS (*it
)));
4896 skip2
= move_it_in_display_line_to (it
, to_charpos
, -1,
4898 TRACE_MOVE ((stderr
, "move_it: to %d\n", IT_CHARPOS (*it
)));
4901 /* Now, decide whether TO_Y is in this line. */
4902 line_height
= it
->max_ascent
+ it
->max_descent
;
4903 TRACE_MOVE ((stderr
, "move_it: line_height = %d\n", line_height
));
4905 if (to_y
>= it
->current_y
4906 && to_y
< it
->current_y
+ line_height
)
4908 if (skip
== MOVE_X_REACHED
)
4909 /* If TO_Y is in this line and TO_X was reached above,
4910 we scanned too far. We have to restore IT's settings
4911 to the ones before skipping. */
4915 else if (skip
== MOVE_X_REACHED
)
4918 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4926 skip
= move_it_in_display_line_to (it
, to_charpos
, -1, MOVE_TO_POS
);
4930 case MOVE_POS_MATCH_OR_ZV
:
4934 case MOVE_NEWLINE_OR_CR
:
4935 set_iterator_to_next (it
, 1);
4936 it
->continuation_lines_width
= 0;
4939 case MOVE_LINE_TRUNCATED
:
4940 it
->continuation_lines_width
= 0;
4941 reseat_at_next_visible_line_start (it
, 0);
4942 if ((op
& MOVE_TO_POS
) != 0
4943 && IT_CHARPOS (*it
) > to_charpos
)
4950 case MOVE_LINE_CONTINUED
:
4951 it
->continuation_lines_width
+= it
->current_x
;
4958 /* Reset/increment for the next run. */
4959 recenter_overlay_lists (current_buffer
, IT_CHARPOS (*it
));
4960 it
->current_x
= it
->hpos
= 0;
4961 it
->current_y
+= it
->max_ascent
+ it
->max_descent
;
4963 last_height
= it
->max_ascent
+ it
->max_descent
;
4964 last_max_ascent
= it
->max_ascent
;
4965 it
->max_ascent
= it
->max_descent
= 0;
4970 TRACE_MOVE ((stderr
, "move_it_to: reached %d\n", reached
));
4974 /* Move iterator IT backward by a specified y-distance DY, DY >= 0.
4976 If DY > 0, move IT backward at least that many pixels. DY = 0
4977 means move IT backward to the preceding line start or BEGV. This
4978 function may move over more than DY pixels if IT->current_y - DY
4979 ends up in the middle of a line; in this case IT->current_y will be
4980 set to the top of the line moved to. */
4983 move_it_vertically_backward (it
, dy
)
4987 int nlines
, h
, line_height
;
4989 int start_pos
= IT_CHARPOS (*it
);
4993 /* Estimate how many newlines we must move back. */
4994 nlines
= max (1, dy
/ CANON_Y_UNIT (it
->f
));
4996 /* Set the iterator's position that many lines back. */
4997 while (nlines
-- && IT_CHARPOS (*it
) > BEGV
)
4998 back_to_previous_visible_line_start (it
);
5000 /* Reseat the iterator here. When moving backward, we don't want
5001 reseat to skip forward over invisible text, set up the iterator
5002 to deliver from overlay strings at the new position etc. So,
5003 use reseat_1 here. */
5004 reseat_1 (it
, it
->current
.pos
, 1);
5006 /* We are now surely at a line start. */
5007 it
->current_x
= it
->hpos
= 0;
5009 /* Move forward and see what y-distance we moved. First move to the
5010 start of the next line so that we get its height. We need this
5011 height to be able to tell whether we reached the specified
5014 it2
.max_ascent
= it2
.max_descent
= 0;
5015 move_it_to (&it2
, start_pos
, -1, -1, it2
.vpos
+ 1,
5016 MOVE_TO_POS
| MOVE_TO_VPOS
);
5017 xassert (IT_CHARPOS (*it
) >= BEGV
);
5018 line_height
= it2
.max_ascent
+ it2
.max_descent
;
5020 move_it_to (&it2
, start_pos
, -1, -1, -1, MOVE_TO_POS
);
5021 xassert (IT_CHARPOS (*it
) >= BEGV
);
5022 h
= it2
.current_y
- it
->current_y
;
5023 nlines
= it2
.vpos
- it
->vpos
;
5025 /* Correct IT's y and vpos position. */
5031 /* DY == 0 means move to the start of the screen line. The
5032 value of nlines is > 0 if continuation lines were involved. */
5034 move_it_by_lines (it
, nlines
, 1);
5035 xassert (IT_CHARPOS (*it
) <= start_pos
);
5039 /* The y-position we try to reach. Note that h has been
5040 subtracted in front of the if-statement. */
5041 int target_y
= it
->current_y
+ h
- dy
;
5043 /* If we did not reach target_y, try to move further backward if
5044 we can. If we moved too far backward, try to move forward. */
5045 if (target_y
< it
->current_y
5046 && IT_CHARPOS (*it
) > BEGV
)
5048 move_it_vertically (it
, target_y
- it
->current_y
);
5049 xassert (IT_CHARPOS (*it
) >= BEGV
);
5051 else if (target_y
>= it
->current_y
+ line_height
5052 && IT_CHARPOS (*it
) < ZV
)
5054 move_it_vertically (it
, target_y
- (it
->current_y
+ line_height
));
5055 xassert (IT_CHARPOS (*it
) >= BEGV
);
5061 /* Move IT by a specified amount of pixel lines DY. DY negative means
5062 move backwards. DY = 0 means move to start of screen line. At the
5063 end, IT will be on the start of a screen line. */
5066 move_it_vertically (it
, dy
)
5071 move_it_vertically_backward (it
, -dy
);
5074 TRACE_MOVE ((stderr
, "move_it_v: from %d, %d\n", IT_CHARPOS (*it
), dy
));
5075 move_it_to (it
, ZV
, -1, it
->current_y
+ dy
, -1,
5076 MOVE_TO_POS
| MOVE_TO_Y
);
5077 TRACE_MOVE ((stderr
, "move_it_v: to %d\n", IT_CHARPOS (*it
)));
5079 /* If buffer ends in ZV without a newline, move to the start of
5080 the line to satisfy the post-condition. */
5081 if (IT_CHARPOS (*it
) == ZV
5082 && FETCH_BYTE (IT_BYTEPOS (*it
) - 1) != '\n')
5083 move_it_by_lines (it
, 0, 0);
5088 /* Move iterator IT past the end of the text line it is in. */
5091 move_it_past_eol (it
)
5094 enum move_it_result rc
;
5096 rc
= move_it_in_display_line_to (it
, Z
, 0, MOVE_TO_POS
);
5097 if (rc
== MOVE_NEWLINE_OR_CR
)
5098 set_iterator_to_next (it
, 0);
5102 #if 0 /* Currently not used. */
5104 /* Return non-zero if some text between buffer positions START_CHARPOS
5105 and END_CHARPOS is invisible. IT->window is the window for text
5109 invisible_text_between_p (it
, start_charpos
, end_charpos
)
5111 int start_charpos
, end_charpos
;
5113 Lisp_Object prop
, limit
;
5114 int invisible_found_p
;
5116 xassert (it
!= NULL
&& start_charpos
<= end_charpos
);
5118 /* Is text at START invisible? */
5119 prop
= Fget_char_property (make_number (start_charpos
), Qinvisible
,
5121 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
5122 invisible_found_p
= 1;
5125 limit
= Fnext_single_char_property_change (make_number (start_charpos
),
5127 make_number (end_charpos
));
5128 invisible_found_p
= XFASTINT (limit
) < end_charpos
;
5131 return invisible_found_p
;
5137 /* Move IT by a specified number DVPOS of screen lines down. DVPOS
5138 negative means move up. DVPOS == 0 means move to the start of the
5139 screen line. NEED_Y_P non-zero means calculate IT->current_y. If
5140 NEED_Y_P is zero, IT->current_y will be left unchanged.
5142 Further optimization ideas: If we would know that IT->f doesn't use
5143 a face with proportional font, we could be faster for
5144 truncate-lines nil. */
5147 move_it_by_lines (it
, dvpos
, need_y_p
)
5149 int dvpos
, need_y_p
;
5151 struct position pos
;
5153 if (!FRAME_WINDOW_P (it
->f
))
5155 struct text_pos textpos
;
5157 /* We can use vmotion on frames without proportional fonts. */
5158 pos
= *vmotion (IT_CHARPOS (*it
), dvpos
, it
->w
);
5159 SET_TEXT_POS (textpos
, pos
.bufpos
, pos
.bytepos
);
5160 reseat (it
, textpos
, 1);
5161 it
->vpos
+= pos
.vpos
;
5162 it
->current_y
+= pos
.vpos
;
5164 else if (dvpos
== 0)
5166 /* DVPOS == 0 means move to the start of the screen line. */
5167 move_it_vertically_backward (it
, 0);
5168 xassert (it
->current_x
== 0 && it
->hpos
== 0);
5171 move_it_to (it
, -1, -1, -1, it
->vpos
+ dvpos
, MOVE_TO_VPOS
);
5175 int start_charpos
, i
;
5177 /* Go back -DVPOS visible lines and reseat the iterator there. */
5178 start_charpos
= IT_CHARPOS (*it
);
5179 for (i
= -dvpos
; i
&& IT_CHARPOS (*it
) > BEGV
; --i
)
5180 back_to_previous_visible_line_start (it
);
5181 reseat (it
, it
->current
.pos
, 1);
5182 it
->current_x
= it
->hpos
= 0;
5184 /* Above call may have moved too far if continuation lines
5185 are involved. Scan forward and see if it did. */
5187 it2
.vpos
= it2
.current_y
= 0;
5188 move_it_to (&it2
, start_charpos
, -1, -1, -1, MOVE_TO_POS
);
5189 it
->vpos
-= it2
.vpos
;
5190 it
->current_y
-= it2
.current_y
;
5191 it
->current_x
= it
->hpos
= 0;
5193 /* If we moved too far, move IT some lines forward. */
5194 if (it2
.vpos
> -dvpos
)
5196 int delta
= it2
.vpos
+ dvpos
;
5197 move_it_to (it
, -1, -1, -1, it
->vpos
+ delta
, MOVE_TO_VPOS
);
5204 /***********************************************************************
5206 ***********************************************************************/
5209 /* Add a message with format string FORMAT and arguments ARG1 and ARG2
5213 add_to_log (format
, arg1
, arg2
)
5215 Lisp_Object arg1
, arg2
;
5217 Lisp_Object args
[3];
5218 Lisp_Object msg
, fmt
;
5221 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
5224 GCPRO4 (fmt
, msg
, arg1
, arg2
);
5226 args
[0] = fmt
= build_string (format
);
5229 msg
= Fformat (3, args
);
5231 len
= STRING_BYTES (XSTRING (msg
)) + 1;
5232 buffer
= (char *) alloca (len
);
5233 strcpy (buffer
, XSTRING (msg
)->data
);
5235 message_dolog (buffer
, len
- 1, 1, 0);
5240 /* Output a newline in the *Messages* buffer if "needs" one. */
5243 message_log_maybe_newline ()
5245 if (message_log_need_newline
)
5246 message_dolog ("", 0, 1, 0);
5250 /* Add a string M of length LEN to the message log, optionally
5251 terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if
5252 nonzero, means interpret the contents of M as multibyte. This
5253 function calls low-level routines in order to bypass text property
5254 hooks, etc. which might not be safe to run. */
5257 message_dolog (m
, len
, nlflag
, multibyte
)
5259 int len
, nlflag
, multibyte
;
5261 if (!NILP (Vmessage_log_max
))
5263 struct buffer
*oldbuf
;
5264 Lisp_Object oldpoint
, oldbegv
, oldzv
;
5265 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
5266 int point_at_end
= 0;
5268 Lisp_Object old_deactivate_mark
, tem
;
5269 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
5271 old_deactivate_mark
= Vdeactivate_mark
;
5272 oldbuf
= current_buffer
;
5273 Fset_buffer (Fget_buffer_create (Vmessages_buffer_name
));
5274 current_buffer
->undo_list
= Qt
;
5276 oldpoint
= Fpoint_marker ();
5277 oldbegv
= Fpoint_min_marker ();
5278 oldzv
= Fpoint_max_marker ();
5279 GCPRO4 (oldpoint
, oldbegv
, oldzv
, old_deactivate_mark
);
5287 BEGV_BYTE
= BEG_BYTE
;
5290 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
5292 /* Insert the string--maybe converting multibyte to single byte
5293 or vice versa, so that all the text fits the buffer. */
5295 && NILP (current_buffer
->enable_multibyte_characters
))
5298 unsigned char work
[1];
5300 /* Convert a multibyte string to single-byte
5301 for the *Message* buffer. */
5302 for (i
= 0; i
< len
; i
+= nbytes
)
5304 c
= string_char_and_length (m
+ i
, len
- i
, &nbytes
);
5305 work
[0] = (SINGLE_BYTE_CHAR_P (c
)
5307 : multibyte_char_to_unibyte (c
, Qnil
));
5308 insert_1_both (work
, 1, 1, 1, 0, 0);
5311 else if (! multibyte
5312 && ! NILP (current_buffer
->enable_multibyte_characters
))
5315 unsigned char *msg
= (unsigned char *) m
;
5316 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
5317 /* Convert a single-byte string to multibyte
5318 for the *Message* buffer. */
5319 for (i
= 0; i
< len
; i
++)
5321 c
= unibyte_char_to_multibyte (msg
[i
]);
5322 nbytes
= CHAR_STRING (c
, str
);
5323 insert_1_both (str
, 1, nbytes
, 1, 0, 0);
5327 insert_1 (m
, len
, 1, 0, 0);
5331 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
5332 insert_1 ("\n", 1, 1, 0, 0);
5334 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
5336 this_bol_byte
= PT_BYTE
;
5340 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
5342 prev_bol_byte
= PT_BYTE
;
5344 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
5345 this_bol
, this_bol_byte
);
5348 del_range_both (prev_bol
, prev_bol_byte
,
5349 this_bol
, this_bol_byte
, 0);
5355 /* If you change this format, don't forget to also
5356 change message_log_check_duplicate. */
5357 sprintf (dupstr
, " [%d times]", dup
);
5358 duplen
= strlen (dupstr
);
5359 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
5360 insert_1 (dupstr
, duplen
, 1, 0, 1);
5365 if (NATNUMP (Vmessage_log_max
))
5367 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
5368 -XFASTINT (Vmessage_log_max
) - 1, 0);
5369 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
5372 BEGV
= XMARKER (oldbegv
)->charpos
;
5373 BEGV_BYTE
= marker_byte_position (oldbegv
);
5382 ZV
= XMARKER (oldzv
)->charpos
;
5383 ZV_BYTE
= marker_byte_position (oldzv
);
5387 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
5389 /* We can't do Fgoto_char (oldpoint) because it will run some
5391 TEMP_SET_PT_BOTH (XMARKER (oldpoint
)->charpos
,
5392 XMARKER (oldpoint
)->bytepos
);
5395 free_marker (oldpoint
);
5396 free_marker (oldbegv
);
5397 free_marker (oldzv
);
5399 tem
= Fget_buffer_window (Fcurrent_buffer (), Qt
);
5400 set_buffer_internal (oldbuf
);
5402 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
5403 message_log_need_newline
= !nlflag
;
5404 Vdeactivate_mark
= old_deactivate_mark
;
5409 /* We are at the end of the buffer after just having inserted a newline.
5410 (Note: We depend on the fact we won't be crossing the gap.)
5411 Check to see if the most recent message looks a lot like the previous one.
5412 Return 0 if different, 1 if the new one should just replace it, or a
5413 value N > 1 if we should also append " [N times]". */
5416 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
5417 int prev_bol
, this_bol
;
5418 int prev_bol_byte
, this_bol_byte
;
5421 int len
= Z_BYTE
- 1 - this_bol_byte
;
5423 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
5424 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
5426 for (i
= 0; i
< len
; i
++)
5428 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.')
5436 if (*p1
++ == ' ' && *p1
++ == '[')
5439 while (*p1
>= '0' && *p1
<= '9')
5440 n
= n
* 10 + *p1
++ - '0';
5441 if (strncmp (p1
, " times]\n", 8) == 0)
5448 /* Display an echo area message M with a specified length of LEN
5449 chars. The string may include null characters. If M is 0, clear
5450 out any existing message, and let the mini-buffer text show through.
5452 The buffer M must continue to exist until after the echo area gets
5453 cleared or some other message gets displayed there. This means do
5454 not pass text that is stored in a Lisp string; do not pass text in
5455 a buffer that was alloca'd. */
5458 message2 (m
, len
, multibyte
)
5463 /* First flush out any partial line written with print. */
5464 message_log_maybe_newline ();
5466 message_dolog (m
, len
, 1, multibyte
);
5467 message2_nolog (m
, len
, multibyte
);
5471 /* The non-logging counterpart of message2. */
5474 message2_nolog (m
, len
, multibyte
)
5478 struct frame
*sf
= SELECTED_FRAME ();
5479 message_enable_multibyte
= multibyte
;
5483 if (noninteractive_need_newline
)
5484 putc ('\n', stderr
);
5485 noninteractive_need_newline
= 0;
5487 fwrite (m
, len
, 1, stderr
);
5488 if (cursor_in_echo_area
== 0)
5489 fprintf (stderr
, "\n");
5492 /* A null message buffer means that the frame hasn't really been
5493 initialized yet. Error messages get reported properly by
5494 cmd_error, so this must be just an informative message; toss it. */
5495 else if (INTERACTIVE
5496 && sf
->glyphs_initialized_p
5497 && FRAME_MESSAGE_BUF (sf
))
5499 Lisp_Object mini_window
;
5502 /* Get the frame containing the mini-buffer
5503 that the selected frame is using. */
5504 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
5505 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
5507 FRAME_SAMPLE_VISIBILITY (f
);
5508 if (FRAME_VISIBLE_P (sf
)
5509 && ! FRAME_VISIBLE_P (f
))
5510 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
5514 set_message (m
, Qnil
, len
, multibyte
);
5515 if (minibuffer_auto_raise
)
5516 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
5519 clear_message (1, 1);
5521 do_pending_window_change (0);
5522 echo_area_display (1);
5523 do_pending_window_change (0);
5524 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
5525 (*frame_up_to_date_hook
) (f
);
5530 /* Display an echo area message M with a specified length of NBYTES
5531 bytes. The string may include null characters. If M is not a
5532 string, clear out any existing message, and let the mini-buffer
5533 text show through. */
5536 message3 (m
, nbytes
, multibyte
)
5541 struct gcpro gcpro1
;
5545 /* First flush out any partial line written with print. */
5546 message_log_maybe_newline ();
5548 message_dolog (XSTRING (m
)->data
, nbytes
, 1, multibyte
);
5549 message3_nolog (m
, nbytes
, multibyte
);
5555 /* The non-logging version of message3. */
5558 message3_nolog (m
, nbytes
, multibyte
)
5560 int nbytes
, multibyte
;
5562 struct frame
*sf
= SELECTED_FRAME ();
5563 message_enable_multibyte
= multibyte
;
5567 if (noninteractive_need_newline
)
5568 putc ('\n', stderr
);
5569 noninteractive_need_newline
= 0;
5571 fwrite (XSTRING (m
)->data
, nbytes
, 1, stderr
);
5572 if (cursor_in_echo_area
== 0)
5573 fprintf (stderr
, "\n");
5576 /* A null message buffer means that the frame hasn't really been
5577 initialized yet. Error messages get reported properly by
5578 cmd_error, so this must be just an informative message; toss it. */
5579 else if (INTERACTIVE
5580 && sf
->glyphs_initialized_p
5581 && FRAME_MESSAGE_BUF (sf
))
5583 Lisp_Object mini_window
;
5587 /* Get the frame containing the mini-buffer
5588 that the selected frame is using. */
5589 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
5590 frame
= XWINDOW (mini_window
)->frame
;
5593 FRAME_SAMPLE_VISIBILITY (f
);
5594 if (FRAME_VISIBLE_P (sf
)
5595 && !FRAME_VISIBLE_P (f
))
5596 Fmake_frame_visible (frame
);
5598 if (STRINGP (m
) && XSTRING (m
)->size
)
5600 set_message (NULL
, m
, nbytes
, multibyte
);
5601 if (minibuffer_auto_raise
)
5602 Fraise_frame (frame
);
5605 clear_message (1, 1);
5607 do_pending_window_change (0);
5608 echo_area_display (1);
5609 do_pending_window_change (0);
5610 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
5611 (*frame_up_to_date_hook
) (f
);
5616 /* Display a null-terminated echo area message M. If M is 0, clear
5617 out any existing message, and let the mini-buffer text show through.
5619 The buffer M must continue to exist until after the echo area gets
5620 cleared or some other message gets displayed there. Do not pass
5621 text that is stored in a Lisp string. Do not pass text in a buffer
5622 that was alloca'd. */
5628 message2 (m
, (m
? strlen (m
) : 0), 0);
5632 /* The non-logging counterpart of message1. */
5638 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
5641 /* Display a message M which contains a single %s
5642 which gets replaced with STRING. */
5645 message_with_string (m
, string
, log
)
5654 if (noninteractive_need_newline
)
5655 putc ('\n', stderr
);
5656 noninteractive_need_newline
= 0;
5657 fprintf (stderr
, m
, XSTRING (string
)->data
);
5658 if (cursor_in_echo_area
== 0)
5659 fprintf (stderr
, "\n");
5663 else if (INTERACTIVE
)
5665 /* The frame whose minibuffer we're going to display the message on.
5666 It may be larger than the selected frame, so we need
5667 to use its buffer, not the selected frame's buffer. */
5668 Lisp_Object mini_window
;
5669 struct frame
*f
, *sf
= SELECTED_FRAME ();
5671 /* Get the frame containing the minibuffer
5672 that the selected frame is using. */
5673 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
5674 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
5676 /* A null message buffer means that the frame hasn't really been
5677 initialized yet. Error messages get reported properly by
5678 cmd_error, so this must be just an informative message; toss it. */
5679 if (FRAME_MESSAGE_BUF (f
))
5683 a
[0] = (char *) XSTRING (string
)->data
;
5685 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5686 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
5689 message2 (FRAME_MESSAGE_BUF (f
), len
,
5690 STRING_MULTIBYTE (string
));
5692 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
5693 STRING_MULTIBYTE (string
));
5695 /* Print should start at the beginning of the message
5696 buffer next time. */
5697 message_buf_print
= 0;
5703 /* Dump an informative message to the minibuf. If M is 0, clear out
5704 any existing message, and let the mini-buffer text show through. */
5708 message (m
, a1
, a2
, a3
)
5710 EMACS_INT a1
, a2
, a3
;
5716 if (noninteractive_need_newline
)
5717 putc ('\n', stderr
);
5718 noninteractive_need_newline
= 0;
5719 fprintf (stderr
, m
, a1
, a2
, a3
);
5720 if (cursor_in_echo_area
== 0)
5721 fprintf (stderr
, "\n");
5725 else if (INTERACTIVE
)
5727 /* The frame whose mini-buffer we're going to display the message
5728 on. It may be larger than the selected frame, so we need to
5729 use its buffer, not the selected frame's buffer. */
5730 Lisp_Object mini_window
;
5731 struct frame
*f
, *sf
= SELECTED_FRAME ();
5733 /* Get the frame containing the mini-buffer
5734 that the selected frame is using. */
5735 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
5736 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
5738 /* A null message buffer means that the frame hasn't really been
5739 initialized yet. Error messages get reported properly by
5740 cmd_error, so this must be just an informative message; toss
5742 if (FRAME_MESSAGE_BUF (f
))
5753 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5754 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
5756 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5757 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
5759 #endif /* NO_ARG_ARRAY */
5761 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
5766 /* Print should start at the beginning of the message
5767 buffer next time. */
5768 message_buf_print
= 0;
5774 /* The non-logging version of message. */
5777 message_nolog (m
, a1
, a2
, a3
)
5779 EMACS_INT a1
, a2
, a3
;
5781 Lisp_Object old_log_max
;
5782 old_log_max
= Vmessage_log_max
;
5783 Vmessage_log_max
= Qnil
;
5784 message (m
, a1
, a2
, a3
);
5785 Vmessage_log_max
= old_log_max
;
5789 /* Display the current message in the current mini-buffer. This is
5790 only called from error handlers in process.c, and is not time
5796 if (!NILP (echo_area_buffer
[0]))
5799 string
= Fcurrent_message ();
5800 message3 (string
, XSTRING (string
)->size
,
5801 !NILP (current_buffer
->enable_multibyte_characters
));
5806 /* Make sure echo area buffers in echo_buffers[] are life. If they
5807 aren't, make new ones. */
5810 ensure_echo_area_buffers ()
5814 for (i
= 0; i
< 2; ++i
)
5815 if (!BUFFERP (echo_buffer
[i
])
5816 || NILP (XBUFFER (echo_buffer
[i
])->name
))
5819 Lisp_Object old_buffer
;
5822 old_buffer
= echo_buffer
[i
];
5823 sprintf (name
, " *Echo Area %d*", i
);
5824 echo_buffer
[i
] = Fget_buffer_create (build_string (name
));
5825 XBUFFER (echo_buffer
[i
])->truncate_lines
= Qnil
;
5827 for (j
= 0; j
< 2; ++j
)
5828 if (EQ (old_buffer
, echo_area_buffer
[j
]))
5829 echo_area_buffer
[j
] = echo_buffer
[i
];
5834 /* Call FN with args A1..A4 with either the current or last displayed
5835 echo_area_buffer as current buffer.
5837 WHICH zero means use the current message buffer
5838 echo_area_buffer[0]. If that is nil, choose a suitable buffer
5839 from echo_buffer[] and clear it.
5841 WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a
5842 suitable buffer from echo_buffer[] and clear it.
5844 If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so
5845 that the current message becomes the last displayed one, make
5846 choose a suitable buffer for echo_area_buffer[0], and clear it.
5848 Value is what FN returns. */
5851 with_echo_area_buffer (w
, which
, fn
, a1
, a2
, a3
, a4
)
5854 int (*fn
) P_ ((EMACS_INT
, Lisp_Object
, EMACS_INT
, EMACS_INT
));
5860 int this_one
, the_other
, clear_buffer_p
, rc
;
5861 int count
= BINDING_STACK_SIZE ();
5863 /* If buffers aren't life, make new ones. */
5864 ensure_echo_area_buffers ();
5869 this_one
= 0, the_other
= 1;
5871 this_one
= 1, the_other
= 0;
5874 this_one
= 0, the_other
= 1;
5877 /* We need a fresh one in case the current echo buffer equals
5878 the one containing the last displayed echo area message. */
5879 if (!NILP (echo_area_buffer
[this_one
])
5880 && EQ (echo_area_buffer
[this_one
], echo_area_buffer
[the_other
]))
5881 echo_area_buffer
[this_one
] = Qnil
;
5884 /* Choose a suitable buffer from echo_buffer[] is we don't
5886 if (NILP (echo_area_buffer
[this_one
]))
5888 echo_area_buffer
[this_one
]
5889 = (EQ (echo_area_buffer
[the_other
], echo_buffer
[this_one
])
5890 ? echo_buffer
[the_other
]
5891 : echo_buffer
[this_one
]);
5895 buffer
= echo_area_buffer
[this_one
];
5897 record_unwind_protect (unwind_with_echo_area_buffer
,
5898 with_echo_area_buffer_unwind_data (w
));
5900 /* Make the echo area buffer current. Note that for display
5901 purposes, it is not necessary that the displayed window's buffer
5902 == current_buffer, except for text property lookup. So, let's
5903 only set that buffer temporarily here without doing a full
5904 Fset_window_buffer. We must also change w->pointm, though,
5905 because otherwise an assertions in unshow_buffer fails, and Emacs
5907 set_buffer_internal_1 (XBUFFER (buffer
));
5911 set_marker_both (w
->pointm
, buffer
, BEG
, BEG_BYTE
);
5914 current_buffer
->undo_list
= Qt
;
5915 current_buffer
->read_only
= Qnil
;
5916 specbind (Qinhibit_read_only
, Qt
);
5918 if (clear_buffer_p
&& Z
> BEG
)
5921 xassert (BEGV
>= BEG
);
5922 xassert (ZV
<= Z
&& ZV
>= BEGV
);
5924 rc
= fn (a1
, a2
, a3
, a4
);
5926 xassert (BEGV
>= BEG
);
5927 xassert (ZV
<= Z
&& ZV
>= BEGV
);
5929 unbind_to (count
, Qnil
);
5934 /* Save state that should be preserved around the call to the function
5935 FN called in with_echo_area_buffer. */
5938 with_echo_area_buffer_unwind_data (w
)
5944 /* Reduce consing by keeping one vector in
5945 Vwith_echo_area_save_vector. */
5946 vector
= Vwith_echo_area_save_vector
;
5947 Vwith_echo_area_save_vector
= Qnil
;
5950 vector
= Fmake_vector (make_number (7), Qnil
);
5952 XSETBUFFER (XVECTOR (vector
)->contents
[i
], current_buffer
); ++i
;
5953 XVECTOR (vector
)->contents
[i
++] = Vdeactivate_mark
;
5954 XVECTOR (vector
)->contents
[i
++] = make_number (windows_or_buffers_changed
);
5958 XSETWINDOW (XVECTOR (vector
)->contents
[i
], w
); ++i
;
5959 XVECTOR (vector
)->contents
[i
++] = w
->buffer
;
5960 XVECTOR (vector
)->contents
[i
++]
5961 = make_number (XMARKER (w
->pointm
)->charpos
);
5962 XVECTOR (vector
)->contents
[i
++]
5963 = make_number (XMARKER (w
->pointm
)->bytepos
);
5969 XVECTOR (vector
)->contents
[i
++] = Qnil
;
5972 xassert (i
== XVECTOR (vector
)->size
);
5977 /* Restore global state from VECTOR which was created by
5978 with_echo_area_buffer_unwind_data. */
5981 unwind_with_echo_area_buffer (vector
)
5984 set_buffer_internal_1 (XBUFFER (AREF (vector
, 0)));
5985 Vdeactivate_mark
= AREF (vector
, 1);
5986 windows_or_buffers_changed
= XFASTINT (AREF (vector
, 2));
5988 if (WINDOWP (AREF (vector
, 3)))
5991 Lisp_Object buffer
, charpos
, bytepos
;
5993 w
= XWINDOW (AREF (vector
, 3));
5994 buffer
= AREF (vector
, 4);
5995 charpos
= AREF (vector
, 5);
5996 bytepos
= AREF (vector
, 6);
5999 set_marker_both (w
->pointm
, buffer
,
6000 XFASTINT (charpos
), XFASTINT (bytepos
));
6003 Vwith_echo_area_save_vector
= vector
;
6008 /* Set up the echo area for use by print functions. MULTIBYTE_P
6009 non-zero means we will print multibyte. */
6012 setup_echo_area_for_printing (multibyte_p
)
6015 ensure_echo_area_buffers ();
6017 if (!message_buf_print
)
6019 /* A message has been output since the last time we printed.
6020 Choose a fresh echo area buffer. */
6021 if (EQ (echo_area_buffer
[1], echo_buffer
[0]))
6022 echo_area_buffer
[0] = echo_buffer
[1];
6024 echo_area_buffer
[0] = echo_buffer
[0];
6026 /* Switch to that buffer and clear it. */
6027 set_buffer_internal (XBUFFER (echo_area_buffer
[0]));
6031 int count
= BINDING_STACK_SIZE ();
6032 specbind (Qinhibit_read_only
, Qt
);
6034 unbind_to (count
, Qnil
);
6036 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
6038 /* Set up the buffer for the multibyteness we need. */
6040 != !NILP (current_buffer
->enable_multibyte_characters
))
6041 Fset_buffer_multibyte (multibyte_p
? Qt
: Qnil
);
6043 /* Raise the frame containing the echo area. */
6044 if (minibuffer_auto_raise
)
6046 struct frame
*sf
= SELECTED_FRAME ();
6047 Lisp_Object mini_window
;
6048 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
6049 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
6052 message_log_maybe_newline ();
6053 message_buf_print
= 1;
6057 if (NILP (echo_area_buffer
[0]))
6059 if (EQ (echo_area_buffer
[1], echo_buffer
[0]))
6060 echo_area_buffer
[0] = echo_buffer
[1];
6062 echo_area_buffer
[0] = echo_buffer
[0];
6065 if (current_buffer
!= XBUFFER (echo_area_buffer
[0]))
6066 /* Someone switched buffers between print requests. */
6067 set_buffer_internal (XBUFFER (echo_area_buffer
[0]));
6072 /* Display an echo area message in window W. Value is non-zero if W's
6073 height is changed. If display_last_displayed_message_p is
6074 non-zero, display the message that was last displayed, otherwise
6075 display the current message. */
6078 display_echo_area (w
)
6081 int i
, no_message_p
, window_height_changed_p
, count
;
6083 /* Temporarily disable garbage collections while displaying the echo
6084 area. This is done because a GC can print a message itself.
6085 That message would modify the echo area buffer's contents while a
6086 redisplay of the buffer is going on, and seriously confuse
6088 count
= inhibit_garbage_collection ();
6090 /* If there is no message, we must call display_echo_area_1
6091 nevertheless because it resizes the window. But we will have to
6092 reset the echo_area_buffer in question to nil at the end because
6093 with_echo_area_buffer will sets it to an empty buffer. */
6094 i
= display_last_displayed_message_p
? 1 : 0;
6095 no_message_p
= NILP (echo_area_buffer
[i
]);
6097 window_height_changed_p
6098 = with_echo_area_buffer (w
, display_last_displayed_message_p
,
6099 display_echo_area_1
,
6100 (EMACS_INT
) w
, Qnil
, 0, 0);
6103 echo_area_buffer
[i
] = Qnil
;
6105 unbind_to (count
, Qnil
);
6106 return window_height_changed_p
;
6110 /* Helper for display_echo_area. Display the current buffer which
6111 contains the current echo area message in window W, a mini-window,
6112 a pointer to which is passed in A1. A2..A4 are currently not used.
6113 Change the height of W so that all of the message is displayed.
6114 Value is non-zero if height of W was changed. */
6117 display_echo_area_1 (a1
, a2
, a3
, a4
)
6122 struct window
*w
= (struct window
*) a1
;
6124 struct text_pos start
;
6125 int window_height_changed_p
= 0;
6127 /* Do this before displaying, so that we have a large enough glyph
6128 matrix for the display. */
6129 window_height_changed_p
= resize_mini_window (w
, 0);
6132 clear_glyph_matrix (w
->desired_matrix
);
6133 XSETWINDOW (window
, w
);
6134 SET_TEXT_POS (start
, BEG
, BEG_BYTE
);
6135 try_window (window
, start
);
6137 return window_height_changed_p
;
6141 /* Resize the echo area window to exactly the size needed for the
6142 currently displayed message, if there is one. */
6145 resize_echo_area_axactly ()
6147 if (BUFFERP (echo_area_buffer
[0])
6148 && WINDOWP (echo_area_window
))
6150 struct window
*w
= XWINDOW (echo_area_window
);
6153 resized_p
= with_echo_area_buffer (w
, 0, resize_mini_window_1
,
6154 (EMACS_INT
) w
, Qnil
, 0, 0);
6157 ++windows_or_buffers_changed
;
6158 ++update_mode_lines
;
6159 redisplay_internal (0);
6165 /* Callback function for with_echo_area_buffer, when used from
6166 resize_echo_area_axactly. A1 contains a pointer to the window to
6167 resize, A2 to A4 are not used. Value is what resize_mini_window
6171 resize_mini_window_1 (a1
, a2
, a3
, a4
)
6176 return resize_mini_window ((struct window
*) a1
, 1);
6180 /* Resize mini-window W to fit the size of its contents. EXACT:P
6181 means size the window exactly to the size needed. Otherwise, it's
6182 only enlarged until W's buffer is empty. Value is non-zero if
6183 the window height has been changed. */
6186 resize_mini_window (w
, exact_p
)
6190 struct frame
*f
= XFRAME (w
->frame
);
6191 int window_height_changed_p
= 0;
6193 xassert (MINI_WINDOW_P (w
));
6195 /* Nil means don't try to resize. */
6196 if (NILP (Vresize_mini_windows
)
6197 || (FRAME_X_P (f
) && f
->output_data
.x
== NULL
))
6200 if (!FRAME_MINIBUF_ONLY_P (f
))
6203 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
6204 int total_height
= XFASTINT (root
->height
) + XFASTINT (w
->height
);
6205 int height
, max_height
;
6206 int unit
= CANON_Y_UNIT (f
);
6207 struct text_pos start
;
6208 struct buffer
*old_current_buffer
= NULL
;
6210 if (current_buffer
!= XBUFFER (w
->buffer
))
6212 old_current_buffer
= current_buffer
;
6213 set_buffer_internal (XBUFFER (w
->buffer
));
6216 init_iterator (&it
, w
, BEGV
, BEGV_BYTE
, NULL
, DEFAULT_FACE_ID
);
6218 /* Compute the max. number of lines specified by the user. */
6219 if (FLOATP (Vmax_mini_window_height
))
6220 max_height
= XFLOATINT (Vmax_mini_window_height
) * total_height
;
6221 else if (INTEGERP (Vmax_mini_window_height
))
6222 max_height
= XINT (Vmax_mini_window_height
);
6224 max_height
= total_height
/ 4;
6226 /* Correct that max. height if it's bogus. */
6227 max_height
= max (1, max_height
);
6228 max_height
= min (total_height
, max_height
);
6230 /* Find out the height of the text in the window. */
6231 if (it
.truncate_lines_p
)
6236 move_it_to (&it
, ZV
, -1, -1, -1, MOVE_TO_POS
);
6237 if (it
.max_ascent
== 0 && it
.max_descent
== 0)
6238 height
= it
.current_y
+ last_height
;
6240 height
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
6241 height
-= it
.extra_line_spacing
;
6242 height
= (height
+ unit
- 1) / unit
;
6245 /* Compute a suitable window start. */
6246 if (height
> max_height
)
6248 height
= max_height
;
6249 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
6250 move_it_vertically_backward (&it
, (height
- 1) * unit
);
6251 start
= it
.current
.pos
;
6254 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
6255 SET_MARKER_FROM_TEXT_POS (w
->start
, start
);
6257 if (EQ (Vresize_mini_windows
, Qgrow_only
))
6259 /* Let it grow only, until we display an empty message, in which
6260 case the window shrinks again. */
6261 if (height
> XFASTINT (w
->height
))
6263 int old_height
= XFASTINT (w
->height
);
6264 freeze_window_starts (f
, 1);
6265 grow_mini_window (w
, height
- XFASTINT (w
->height
));
6266 window_height_changed_p
= XFASTINT (w
->height
) != old_height
;
6268 else if (height
< XFASTINT (w
->height
)
6269 && (exact_p
|| BEGV
== ZV
))
6271 int old_height
= XFASTINT (w
->height
);
6272 freeze_window_starts (f
, 0);
6273 shrink_mini_window (w
);
6274 window_height_changed_p
= XFASTINT (w
->height
) != old_height
;
6279 /* Always resize to exact size needed. */
6280 if (height
> XFASTINT (w
->height
))
6282 int old_height
= XFASTINT (w
->height
);
6283 freeze_window_starts (f
, 1);
6284 grow_mini_window (w
, height
- XFASTINT (w
->height
));
6285 window_height_changed_p
= XFASTINT (w
->height
) != old_height
;
6287 else if (height
< XFASTINT (w
->height
))
6289 int old_height
= XFASTINT (w
->height
);
6290 freeze_window_starts (f
, 0);
6291 shrink_mini_window (w
);
6295 freeze_window_starts (f
, 1);
6296 grow_mini_window (w
, height
- XFASTINT (w
->height
));
6299 window_height_changed_p
= XFASTINT (w
->height
) != old_height
;
6303 if (old_current_buffer
)
6304 set_buffer_internal (old_current_buffer
);
6307 return window_height_changed_p
;
6311 /* Value is the current message, a string, or nil if there is no
6319 if (NILP (echo_area_buffer
[0]))
6323 with_echo_area_buffer (0, 0, current_message_1
,
6324 (EMACS_INT
) &msg
, Qnil
, 0, 0);
6326 echo_area_buffer
[0] = Qnil
;
6334 current_message_1 (a1
, a2
, a3
, a4
)
6339 Lisp_Object
*msg
= (Lisp_Object
*) a1
;
6342 *msg
= make_buffer_string (BEG
, Z
, 1);
6349 /* Push the current message on Vmessage_stack for later restauration
6350 by restore_message. Value is non-zero if the current message isn't
6351 empty. This is a relatively infrequent operation, so it's not
6352 worth optimizing. */
6358 msg
= current_message ();
6359 Vmessage_stack
= Fcons (msg
, Vmessage_stack
);
6360 return STRINGP (msg
);
6364 /* Handler for record_unwind_protect calling pop_message. */
6367 push_message_unwind (dummy
)
6375 /* Restore message display from the top of Vmessage_stack. */
6382 xassert (CONSP (Vmessage_stack
));
6383 msg
= XCAR (Vmessage_stack
);
6385 message3_nolog (msg
, STRING_BYTES (XSTRING (msg
)), STRING_MULTIBYTE (msg
));
6387 message3_nolog (msg
, 0, 0);
6391 /* Pop the top-most entry off Vmessage_stack. */
6396 xassert (CONSP (Vmessage_stack
));
6397 Vmessage_stack
= XCDR (Vmessage_stack
);
6401 /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs
6402 exits. If the stack is not empty, we have a missing pop_message
6406 check_message_stack ()
6408 if (!NILP (Vmessage_stack
))
6413 /* Truncate to NCHARS what will be displayed in the echo area the next
6414 time we display it---but don't redisplay it now. */
6417 truncate_echo_area (nchars
)
6421 echo_area_buffer
[0] = Qnil
;
6422 /* A null message buffer means that the frame hasn't really been
6423 initialized yet. Error messages get reported properly by
6424 cmd_error, so this must be just an informative message; toss it. */
6425 else if (!noninteractive
6427 && !NILP (echo_area_buffer
[0]))
6429 struct frame
*sf
= SELECTED_FRAME ();
6430 if (FRAME_MESSAGE_BUF (sf
))
6431 with_echo_area_buffer (0, 0, truncate_message_1
, nchars
, Qnil
, 0, 0);
6436 /* Helper function for truncate_echo_area. Truncate the current
6437 message to at most NCHARS characters. */
6440 truncate_message_1 (nchars
, a2
, a3
, a4
)
6445 if (BEG
+ nchars
< Z
)
6446 del_range (BEG
+ nchars
, Z
);
6448 echo_area_buffer
[0] = Qnil
;
6453 /* Set the current message to a substring of S or STRING.
6455 If STRING is a Lisp string, set the message to the first NBYTES
6456 bytes from STRING. NBYTES zero means use the whole string. If
6457 STRING is multibyte, the message will be displayed multibyte.
6459 If S is not null, set the message to the first LEN bytes of S. LEN
6460 zero means use the whole string. MULTIBYTE_P non-zero means S is
6461 multibyte. Display the message multibyte in that case. */
6464 set_message (s
, string
, nbytes
, multibyte_p
)
6469 message_enable_multibyte
6470 = ((s
&& multibyte_p
)
6471 || (STRINGP (string
) && STRING_MULTIBYTE (string
)));
6473 with_echo_area_buffer (0, -1, set_message_1
,
6474 (EMACS_INT
) s
, string
, nbytes
, multibyte_p
);
6475 message_buf_print
= 0;
6476 help_echo_showing_p
= 0;
6480 /* Helper function for set_message. Arguments have the same meaning
6481 as there, with A1 corresponding to S and A2 corresponding to STRING
6482 This function is called with the echo area buffer being
6486 set_message_1 (a1
, a2
, nbytes
, multibyte_p
)
6489 EMACS_INT nbytes
, multibyte_p
;
6491 char *s
= (char *) a1
;
6492 Lisp_Object string
= a2
;
6496 /* Change multibyteness of the echo buffer appropriately. */
6497 if (message_enable_multibyte
6498 != !NILP (current_buffer
->enable_multibyte_characters
))
6499 Fset_buffer_multibyte (message_enable_multibyte
? Qt
: Qnil
);
6501 current_buffer
->truncate_lines
= message_truncate_lines
? Qt
: Qnil
;
6503 /* Insert new message at BEG. */
6504 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
6506 if (STRINGP (string
))
6511 nbytes
= XSTRING (string
)->size_byte
;
6512 nchars
= string_byte_to_char (string
, nbytes
);
6514 /* This function takes care of single/multibyte conversion. We
6515 just have to ensure that the echo area buffer has the right
6516 setting of enable_multibyte_characters. */
6517 insert_from_string (string
, 0, 0, nchars
, nbytes
, 1);
6522 nbytes
= strlen (s
);
6524 if (multibyte_p
&& NILP (current_buffer
->enable_multibyte_characters
))
6526 /* Convert from multi-byte to single-byte. */
6528 unsigned char work
[1];
6530 /* Convert a multibyte string to single-byte. */
6531 for (i
= 0; i
< nbytes
; i
+= n
)
6533 c
= string_char_and_length (s
+ i
, nbytes
- i
, &n
);
6534 work
[0] = (SINGLE_BYTE_CHAR_P (c
)
6536 : multibyte_char_to_unibyte (c
, Qnil
));
6537 insert_1_both (work
, 1, 1, 1, 0, 0);
6540 else if (!multibyte_p
6541 && !NILP (current_buffer
->enable_multibyte_characters
))
6543 /* Convert from single-byte to multi-byte. */
6545 unsigned char *msg
= (unsigned char *) s
;
6546 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
6548 /* Convert a single-byte string to multibyte. */
6549 for (i
= 0; i
< nbytes
; i
++)
6551 c
= unibyte_char_to_multibyte (msg
[i
]);
6552 n
= CHAR_STRING (c
, str
);
6553 insert_1_both (str
, 1, n
, 1, 0, 0);
6557 insert_1 (s
, nbytes
, 1, 0, 0);
6564 /* Clear messages. CURRENT_P non-zero means clear the current
6565 message. LAST_DISPLAYED_P non-zero means clear the message
6569 clear_message (current_p
, last_displayed_p
)
6570 int current_p
, last_displayed_p
;
6573 echo_area_buffer
[0] = Qnil
;
6575 if (last_displayed_p
)
6576 echo_area_buffer
[1] = Qnil
;
6578 message_buf_print
= 0;
6581 /* Clear garbaged frames.
6583 This function is used where the old redisplay called
6584 redraw_garbaged_frames which in turn called redraw_frame which in
6585 turn called clear_frame. The call to clear_frame was a source of
6586 flickering. I believe a clear_frame is not necessary. It should
6587 suffice in the new redisplay to invalidate all current matrices,
6588 and ensure a complete redisplay of all windows. */
6591 clear_garbaged_frames ()
6595 Lisp_Object tail
, frame
;
6597 FOR_EACH_FRAME (tail
, frame
)
6599 struct frame
*f
= XFRAME (frame
);
6601 if (FRAME_VISIBLE_P (f
) && FRAME_GARBAGED_P (f
))
6603 clear_current_matrices (f
);
6609 ++windows_or_buffers_changed
;
6614 /* Redisplay the echo area of the selected frame. If UPDATE_FRAME_P
6615 is non-zero update selected_frame. Value is non-zero if the
6616 mini-windows height has been changed. */
6619 echo_area_display (update_frame_p
)
6622 Lisp_Object mini_window
;
6625 int window_height_changed_p
= 0;
6626 struct frame
*sf
= SELECTED_FRAME ();
6628 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
6629 w
= XWINDOW (mini_window
);
6630 f
= XFRAME (WINDOW_FRAME (w
));
6632 /* Don't display if frame is invisible or not yet initialized. */
6633 if (!FRAME_VISIBLE_P (f
) || !f
->glyphs_initialized_p
)
6636 /* The terminal frame is used as the first Emacs frame on the Mac OS. */
6638 #ifdef HAVE_WINDOW_SYSTEM
6639 /* When Emacs starts, selected_frame may be a visible terminal
6640 frame, even if we run under a window system. If we let this
6641 through, a message would be displayed on the terminal. */
6642 if (EQ (selected_frame
, Vterminal_frame
)
6643 && !NILP (Vwindow_system
))
6645 #endif /* HAVE_WINDOW_SYSTEM */
6648 /* Redraw garbaged frames. */
6650 clear_garbaged_frames ();
6652 if (!NILP (echo_area_buffer
[0]) || minibuf_level
== 0)
6654 echo_area_window
= mini_window
;
6655 window_height_changed_p
= display_echo_area (w
);
6656 w
->must_be_updated_p
= 1;
6658 /* Update the display, unless called from redisplay_internal.
6659 Also don't update the screen during redisplay itself. The
6660 update will happen at the end of redisplay, and an update
6661 here could cause confusion. */
6662 if (update_frame_p
&& !redisplaying_p
)
6666 /* If the display update has been interrupted by pending
6667 input, update mode lines in the frame. Due to the
6668 pending input, it might have been that redisplay hasn't
6669 been called, so that mode lines above the echo area are
6670 garbaged. This looks odd, so we prevent it here. */
6671 if (!display_completed
)
6672 n
= redisplay_mode_lines (FRAME_ROOT_WINDOW (f
), 0);
6674 if (window_height_changed_p
)
6676 /* Must update other windows. Likewise as in other
6677 cases, don't let this update be interrupted by
6679 int count
= BINDING_STACK_SIZE ();
6680 specbind (Qredisplay_dont_pause
, Qt
);
6681 windows_or_buffers_changed
= 1;
6682 redisplay_internal (0);
6683 unbind_to (count
, Qnil
);
6685 else if (FRAME_WINDOW_P (f
) && n
== 0)
6687 /* Window configuration is the same as before.
6688 Can do with a display update of the echo area,
6689 unless we displayed some mode lines. */
6690 update_single_window (w
, 1);
6691 rif
->flush_display (f
);
6694 update_frame (f
, 1, 1);
6696 /* If cursor is in the echo area, make sure that the next
6697 redisplay displays the minibuffer, so that the cursor will
6698 be replaced with what the minibuffer wants. */
6699 if (cursor_in_echo_area
)
6700 ++windows_or_buffers_changed
;
6703 else if (!EQ (mini_window
, selected_window
))
6704 windows_or_buffers_changed
++;
6706 /* Last displayed message is now the current message. */
6707 echo_area_buffer
[1] = echo_area_buffer
[0];
6709 /* Prevent redisplay optimization in redisplay_internal by resetting
6710 this_line_start_pos. This is done because the mini-buffer now
6711 displays the message instead of its buffer text. */
6712 if (EQ (mini_window
, selected_window
))
6713 CHARPOS (this_line_start_pos
) = 0;
6715 return window_height_changed_p
;
6720 /***********************************************************************
6722 ***********************************************************************/
6725 #ifdef HAVE_WINDOW_SYSTEM
6727 /* A buffer for constructing frame titles in it; allocated from the
6728 heap in init_xdisp and resized as needed in store_frame_title_char. */
6730 static char *frame_title_buf
;
6732 /* The buffer's end, and a current output position in it. */
6734 static char *frame_title_buf_end
;
6735 static char *frame_title_ptr
;
6738 /* Store a single character C for the frame title in frame_title_buf.
6739 Re-allocate frame_title_buf if necessary. */
6742 store_frame_title_char (c
)
6745 /* If output position has reached the end of the allocated buffer,
6746 double the buffer's size. */
6747 if (frame_title_ptr
== frame_title_buf_end
)
6749 int len
= frame_title_ptr
- frame_title_buf
;
6750 int new_size
= 2 * len
* sizeof *frame_title_buf
;
6751 frame_title_buf
= (char *) xrealloc (frame_title_buf
, new_size
);
6752 frame_title_buf_end
= frame_title_buf
+ new_size
;
6753 frame_title_ptr
= frame_title_buf
+ len
;
6756 *frame_title_ptr
++ = c
;
6760 /* Store part of a frame title in frame_title_buf, beginning at
6761 frame_title_ptr. STR is the string to store. Do not copy more
6762 than PRECISION number of bytes from STR; PRECISION <= 0 means copy
6763 the whole string. Pad with spaces until FIELD_WIDTH number of
6764 characters have been copied; FIELD_WIDTH <= 0 means don't pad.
6765 Called from display_mode_element when it is used to build a frame
6769 store_frame_title (str
, field_width
, precision
)
6771 int field_width
, precision
;
6775 /* Copy at most PRECISION chars from STR. */
6776 while ((precision
<= 0 || n
< precision
)
6779 store_frame_title_char (*str
++);
6783 /* Fill up with spaces until FIELD_WIDTH reached. */
6784 while (field_width
> 0
6787 store_frame_title_char (' ');
6795 /* Set the title of FRAME, if it has changed. The title format is
6796 Vicon_title_format if FRAME is iconified, otherwise it is
6797 frame_title_format. */
6800 x_consider_frame_title (frame
)
6803 struct frame
*f
= XFRAME (frame
);
6805 if (FRAME_WINDOW_P (f
)
6806 || FRAME_MINIBUF_ONLY_P (f
)
6807 || f
->explicit_name
)
6809 /* Do we have more than one visible frame on this X display? */
6812 struct buffer
*obuf
;
6816 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
6818 struct frame
*tf
= XFRAME (XCAR (tail
));
6821 && FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
6822 && !FRAME_MINIBUF_ONLY_P (tf
)
6823 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
6827 /* Set global variable indicating that multiple frames exist. */
6828 multiple_frames
= CONSP (tail
);
6830 /* Switch to the buffer of selected window of the frame. Set up
6831 frame_title_ptr so that display_mode_element will output into it;
6832 then display the title. */
6833 obuf
= current_buffer
;
6834 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
6835 fmt
= FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
;
6836 frame_title_ptr
= frame_title_buf
;
6837 init_iterator (&it
, XWINDOW (f
->selected_window
), -1, -1,
6838 NULL
, DEFAULT_FACE_ID
);
6839 len
= display_mode_element (&it
, 0, -1, -1, fmt
);
6840 frame_title_ptr
= NULL
;
6841 set_buffer_internal (obuf
);
6843 /* Set the title only if it's changed. This avoids consing in
6844 the common case where it hasn't. (If it turns out that we've
6845 already wasted too much time by walking through the list with
6846 display_mode_element, then we might need to optimize at a
6847 higher level than this.) */
6848 if (! STRINGP (f
->name
)
6849 || STRING_BYTES (XSTRING (f
->name
)) != len
6850 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
6851 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
6855 #else /* not HAVE_WINDOW_SYSTEM */
6857 #define frame_title_ptr ((char *)0)
6858 #define store_frame_title(str, mincol, maxcol) 0
6860 #endif /* not HAVE_WINDOW_SYSTEM */
6865 /***********************************************************************
6867 ***********************************************************************/
6870 /* Prepare for redisplay by updating menu-bar item lists when
6871 appropriate. This can call eval. */
6874 prepare_menu_bars ()
6877 struct gcpro gcpro1
, gcpro2
;
6879 Lisp_Object tooltip_frame
;
6881 #ifdef HAVE_X_WINDOWS
6882 tooltip_frame
= tip_frame
;
6884 tooltip_frame
= Qnil
;
6887 /* Update all frame titles based on their buffer names, etc. We do
6888 this before the menu bars so that the buffer-menu will show the
6889 up-to-date frame titles. */
6890 #ifdef HAVE_WINDOW_SYSTEM
6891 if (windows_or_buffers_changed
|| update_mode_lines
)
6893 Lisp_Object tail
, frame
;
6895 FOR_EACH_FRAME (tail
, frame
)
6898 if (!EQ (frame
, tooltip_frame
)
6899 && (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
)))
6900 x_consider_frame_title (frame
);
6903 #endif /* HAVE_WINDOW_SYSTEM */
6905 /* Update the menu bar item lists, if appropriate. This has to be
6906 done before any actual redisplay or generation of display lines. */
6907 all_windows
= (update_mode_lines
6908 || buffer_shared
> 1
6909 || windows_or_buffers_changed
);
6912 Lisp_Object tail
, frame
;
6913 int count
= BINDING_STACK_SIZE ();
6915 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6917 FOR_EACH_FRAME (tail
, frame
)
6921 /* Ignore tooltip frame. */
6922 if (EQ (frame
, tooltip_frame
))
6925 /* If a window on this frame changed size, report that to
6926 the user and clear the size-change flag. */
6927 if (FRAME_WINDOW_SIZES_CHANGED (f
))
6929 Lisp_Object functions
;
6931 /* Clear flag first in case we get an error below. */
6932 FRAME_WINDOW_SIZES_CHANGED (f
) = 0;
6933 functions
= Vwindow_size_change_functions
;
6934 GCPRO2 (tail
, functions
);
6936 while (CONSP (functions
))
6938 call1 (XCAR (functions
), frame
);
6939 functions
= XCDR (functions
);
6945 update_menu_bar (f
, 0);
6946 #ifdef HAVE_WINDOW_SYSTEM
6947 update_tool_bar (f
, 0);
6952 unbind_to (count
, Qnil
);
6956 struct frame
*sf
= SELECTED_FRAME ();
6957 update_menu_bar (sf
, 1);
6958 #ifdef HAVE_WINDOW_SYSTEM
6959 update_tool_bar (sf
, 1);
6963 /* Motif needs this. See comment in xmenu.c. Turn it off when
6964 pending_menu_activation is not defined. */
6965 #ifdef USE_X_TOOLKIT
6966 pending_menu_activation
= 0;
6971 /* Update the menu bar item list for frame F. This has to be done
6972 before we start to fill in any display lines, because it can call
6975 If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */
6978 update_menu_bar (f
, save_match_data
)
6980 int save_match_data
;
6983 register struct window
*w
;
6985 window
= FRAME_SELECTED_WINDOW (f
);
6986 w
= XWINDOW (window
);
6988 if (update_mode_lines
)
6989 w
->update_mode_line
= Qt
;
6991 if (FRAME_WINDOW_P (f
)
6993 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh)
6994 FRAME_EXTERNAL_MENU_BAR (f
)
6996 FRAME_MENU_BAR_LINES (f
) > 0
6998 : FRAME_MENU_BAR_LINES (f
) > 0)
7000 /* If the user has switched buffers or windows, we need to
7001 recompute to reflect the new bindings. But we'll
7002 recompute when update_mode_lines is set too; that means
7003 that people can use force-mode-line-update to request
7004 that the menu bar be recomputed. The adverse effect on
7005 the rest of the redisplay algorithm is about the same as
7006 windows_or_buffers_changed anyway. */
7007 if (windows_or_buffers_changed
7008 || !NILP (w
->update_mode_line
)
7009 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
7010 < BUF_MODIFF (XBUFFER (w
->buffer
)))
7011 != !NILP (w
->last_had_star
))
7012 || ((!NILP (Vtransient_mark_mode
)
7013 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
7014 != !NILP (w
->region_showing
)))
7016 struct buffer
*prev
= current_buffer
;
7017 int count
= BINDING_STACK_SIZE ();
7019 set_buffer_internal_1 (XBUFFER (w
->buffer
));
7020 if (save_match_data
)
7021 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
7022 if (NILP (Voverriding_local_map_menu_flag
))
7024 specbind (Qoverriding_terminal_local_map
, Qnil
);
7025 specbind (Qoverriding_local_map
, Qnil
);
7028 /* Run the Lucid hook. */
7029 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
7031 /* If it has changed current-menubar from previous value,
7032 really recompute the menu-bar from the value. */
7033 if (! NILP (Vlucid_menu_bar_dirty_flag
))
7034 call0 (Qrecompute_lucid_menubar
);
7036 safe_run_hooks (Qmenu_bar_update_hook
);
7037 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
7039 /* Redisplay the menu bar in case we changed it. */
7040 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh)
7041 if (FRAME_WINDOW_P (f
)
7042 #if defined (macintosh)
7043 /* All frames on Mac OS share the same menubar. So only the
7044 selected frame should be allowed to set it. */
7045 && f
== SELECTED_FRAME ()
7048 set_frame_menubar (f
, 0, 0);
7050 /* On a terminal screen, the menu bar is an ordinary screen
7051 line, and this makes it get updated. */
7052 w
->update_mode_line
= Qt
;
7053 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
7054 /* In the non-toolkit version, the menu bar is an ordinary screen
7055 line, and this makes it get updated. */
7056 w
->update_mode_line
= Qt
;
7057 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
7059 unbind_to (count
, Qnil
);
7060 set_buffer_internal_1 (prev
);
7067 /***********************************************************************
7069 ***********************************************************************/
7071 #ifdef HAVE_WINDOW_SYSTEM
7073 /* Update the tool-bar item list for frame F. This has to be done
7074 before we start to fill in any display lines. Called from
7075 prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save
7076 and restore it here. */
7079 update_tool_bar (f
, save_match_data
)
7081 int save_match_data
;
7083 if (WINDOWP (f
->tool_bar_window
)
7084 && XFASTINT (XWINDOW (f
->tool_bar_window
)->height
) > 0)
7089 window
= FRAME_SELECTED_WINDOW (f
);
7090 w
= XWINDOW (window
);
7092 /* If the user has switched buffers or windows, we need to
7093 recompute to reflect the new bindings. But we'll
7094 recompute when update_mode_lines is set too; that means
7095 that people can use force-mode-line-update to request
7096 that the menu bar be recomputed. The adverse effect on
7097 the rest of the redisplay algorithm is about the same as
7098 windows_or_buffers_changed anyway. */
7099 if (windows_or_buffers_changed
7100 || !NILP (w
->update_mode_line
)
7101 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
7102 < BUF_MODIFF (XBUFFER (w
->buffer
)))
7103 != !NILP (w
->last_had_star
))
7104 || ((!NILP (Vtransient_mark_mode
)
7105 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
7106 != !NILP (w
->region_showing
)))
7108 struct buffer
*prev
= current_buffer
;
7109 int count
= BINDING_STACK_SIZE ();
7111 /* Set current_buffer to the buffer of the selected
7112 window of the frame, so that we get the right local
7114 set_buffer_internal_1 (XBUFFER (w
->buffer
));
7116 /* Save match data, if we must. */
7117 if (save_match_data
)
7118 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
7120 /* Make sure that we don't accidentally use bogus keymaps. */
7121 if (NILP (Voverriding_local_map_menu_flag
))
7123 specbind (Qoverriding_terminal_local_map
, Qnil
);
7124 specbind (Qoverriding_local_map
, Qnil
);
7127 /* Build desired tool-bar items from keymaps. */
7129 = tool_bar_items (f
->tool_bar_items
, &f
->n_tool_bar_items
);
7131 /* Redisplay the tool-bar in case we changed it. */
7132 w
->update_mode_line
= Qt
;
7134 unbind_to (count
, Qnil
);
7135 set_buffer_internal_1 (prev
);
7141 /* Set F->desired_tool_bar_string to a Lisp string representing frame
7142 F's desired tool-bar contents. F->tool_bar_items must have
7143 been set up previously by calling prepare_menu_bars. */
7146 build_desired_tool_bar_string (f
)
7149 int i
, size
, size_needed
;
7150 struct gcpro gcpro1
, gcpro2
, gcpro3
;
7151 Lisp_Object image
, plist
, props
;
7153 image
= plist
= props
= Qnil
;
7154 GCPRO3 (image
, plist
, props
);
7156 /* Prepare F->desired_tool_bar_string. If we can reuse it, do so.
7157 Otherwise, make a new string. */
7159 /* The size of the string we might be able to reuse. */
7160 size
= (STRINGP (f
->desired_tool_bar_string
)
7161 ? XSTRING (f
->desired_tool_bar_string
)->size
7164 /* We need one space in the string for each image. */
7165 size_needed
= f
->n_tool_bar_items
;
7167 /* Reuse f->desired_tool_bar_string, if possible. */
7168 if (size
< size_needed
)
7169 f
->desired_tool_bar_string
= Fmake_string (make_number (size_needed
),
7173 props
= list4 (Qdisplay
, Qnil
, Qmenu_item
, Qnil
);
7174 Fremove_text_properties (make_number (0), make_number (size
),
7175 props
, f
->desired_tool_bar_string
);
7178 /* Put a `display' property on the string for the images to display,
7179 put a `menu_item' property on tool-bar items with a value that
7180 is the index of the item in F's tool-bar item vector. */
7181 for (i
= 0; i
< f
->n_tool_bar_items
; ++i
)
7183 #define PROP(IDX) AREF (f->tool_bar_items, i * TOOL_BAR_ITEM_NSLOTS + (IDX))
7185 int enabled_p
= !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P
));
7186 int selected_p
= !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P
));
7187 int hmargin
, vmargin
, relief
, idx
, end
;
7188 extern Lisp_Object QCrelief
, QCmargin
, QCconversion
, Qimage
;
7189 extern Lisp_Object Qlaplace
;
7191 /* If image is a vector, choose the image according to the
7193 image
= PROP (TOOL_BAR_ITEM_IMAGES
);
7194 if (VECTORP (image
))
7198 ? TOOL_BAR_IMAGE_ENABLED_SELECTED
7199 : TOOL_BAR_IMAGE_ENABLED_DESELECTED
);
7202 ? TOOL_BAR_IMAGE_DISABLED_SELECTED
7203 : TOOL_BAR_IMAGE_DISABLED_DESELECTED
);
7205 xassert (ASIZE (image
) >= idx
);
7206 image
= AREF (image
, idx
);
7211 /* Ignore invalid image specifications. */
7212 if (!valid_image_p (image
))
7215 /* Display the tool-bar button pressed, or depressed. */
7216 plist
= Fcopy_sequence (XCDR (image
));
7218 /* Compute margin and relief to draw. */
7219 relief
= tool_bar_button_relief
> 0 ? tool_bar_button_relief
: 3;
7220 hmargin
= vmargin
= relief
;
7222 if (INTEGERP (Vtool_bar_button_margin
)
7223 && XINT (Vtool_bar_button_margin
) > 0)
7225 hmargin
+= XFASTINT (Vtool_bar_button_margin
);
7226 vmargin
+= XFASTINT (Vtool_bar_button_margin
);
7228 else if (CONSP (Vtool_bar_button_margin
))
7230 if (INTEGERP (XCAR (Vtool_bar_button_margin
))
7231 && XINT (XCAR (Vtool_bar_button_margin
)) > 0)
7232 hmargin
+= XFASTINT (XCAR (Vtool_bar_button_margin
));
7234 if (INTEGERP (XCDR (Vtool_bar_button_margin
))
7235 && XINT (XCDR (Vtool_bar_button_margin
)) > 0)
7236 vmargin
+= XFASTINT (XCDR (Vtool_bar_button_margin
));
7239 if (auto_raise_tool_bar_buttons_p
)
7241 /* Add a `:relief' property to the image spec if the item is
7245 plist
= Fplist_put (plist
, QCrelief
, make_number (-relief
));
7252 /* If image is selected, display it pressed, i.e. with a
7253 negative relief. If it's not selected, display it with a
7255 plist
= Fplist_put (plist
, QCrelief
,
7257 ? make_number (-relief
)
7258 : make_number (relief
)));
7263 /* Put a margin around the image. */
7264 if (hmargin
|| vmargin
)
7266 if (hmargin
== vmargin
)
7267 plist
= Fplist_put (plist
, QCmargin
, make_number (hmargin
));
7269 plist
= Fplist_put (plist
, QCmargin
,
7270 Fcons (make_number (hmargin
),
7271 make_number (vmargin
)));
7274 /* If button is not enabled, and we don't have special images
7275 for the disabled state, make the image appear disabled by
7276 applying an appropriate algorithm to it. */
7277 if (!enabled_p
&& idx
< 0)
7278 plist
= Fplist_put (plist
, QCconversion
, Qdisabled
);
7280 /* Put a `display' text property on the string for the image to
7281 display. Put a `menu-item' property on the string that gives
7282 the start of this item's properties in the tool-bar items
7284 image
= Fcons (Qimage
, plist
);
7285 props
= list4 (Qdisplay
, image
,
7286 Qmenu_item
, make_number (i
* TOOL_BAR_ITEM_NSLOTS
));
7288 /* Let the last image hide all remaining spaces in the tool bar
7289 string. The string can be longer than needed when we reuse a
7291 if (i
+ 1 == f
->n_tool_bar_items
)
7292 end
= XSTRING (f
->desired_tool_bar_string
)->size
;
7295 Fadd_text_properties (make_number (i
), make_number (end
),
7296 props
, f
->desired_tool_bar_string
);
7304 /* Display one line of the tool-bar of frame IT->f. */
7307 display_tool_bar_line (it
)
7310 struct glyph_row
*row
= it
->glyph_row
;
7311 int max_x
= it
->last_visible_x
;
7314 prepare_desired_row (row
);
7315 row
->y
= it
->current_y
;
7317 /* Note that this isn't made use of if the face hasn't a box,
7318 so there's no need to check the face here. */
7319 it
->start_of_box_run_p
= 1;
7321 while (it
->current_x
< max_x
)
7323 int x_before
, x
, n_glyphs_before
, i
, nglyphs
;
7325 /* Get the next display element. */
7326 if (!get_next_display_element (it
))
7329 /* Produce glyphs. */
7330 x_before
= it
->current_x
;
7331 n_glyphs_before
= it
->glyph_row
->used
[TEXT_AREA
];
7332 PRODUCE_GLYPHS (it
);
7334 nglyphs
= it
->glyph_row
->used
[TEXT_AREA
] - n_glyphs_before
;
7339 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
7341 if (x
+ glyph
->pixel_width
> max_x
)
7343 /* Glyph doesn't fit on line. */
7344 it
->glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
7350 x
+= glyph
->pixel_width
;
7354 /* Stop at line ends. */
7355 if (ITERATOR_AT_END_OF_LINE_P (it
))
7358 set_iterator_to_next (it
, 1);
7363 row
->displays_text_p
= row
->used
[TEXT_AREA
] != 0;
7364 extend_face_to_end_of_line (it
);
7365 last
= row
->glyphs
[TEXT_AREA
] + row
->used
[TEXT_AREA
] - 1;
7366 last
->right_box_line_p
= 1;
7367 if (last
== row
->glyphs
[TEXT_AREA
])
7368 last
->left_box_line_p
= 1;
7369 compute_line_metrics (it
);
7371 /* If line is empty, make it occupy the rest of the tool-bar. */
7372 if (!row
->displays_text_p
)
7374 row
->height
= row
->phys_height
= it
->last_visible_y
- row
->y
;
7375 row
->ascent
= row
->phys_ascent
= 0;
7378 row
->full_width_p
= 1;
7379 row
->continued_p
= 0;
7380 row
->truncated_on_left_p
= 0;
7381 row
->truncated_on_right_p
= 0;
7383 it
->current_x
= it
->hpos
= 0;
7384 it
->current_y
+= row
->height
;
7390 /* Value is the number of screen lines needed to make all tool-bar
7391 items of frame F visible. */
7394 tool_bar_lines_needed (f
)
7397 struct window
*w
= XWINDOW (f
->tool_bar_window
);
7400 /* Initialize an iterator for iteration over
7401 F->desired_tool_bar_string in the tool-bar window of frame F. */
7402 init_iterator (&it
, w
, -1, -1, w
->desired_matrix
->rows
, TOOL_BAR_FACE_ID
);
7403 it
.first_visible_x
= 0;
7404 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
7405 reseat_to_string (&it
, NULL
, f
->desired_tool_bar_string
, 0, 0, 0, -1);
7407 while (!ITERATOR_AT_END_P (&it
))
7409 it
.glyph_row
= w
->desired_matrix
->rows
;
7410 clear_glyph_row (it
.glyph_row
);
7411 display_tool_bar_line (&it
);
7414 return (it
.current_y
+ CANON_Y_UNIT (f
) - 1) / CANON_Y_UNIT (f
);
7418 /* Display the tool-bar of frame F. Value is non-zero if tool-bar's
7419 height should be changed. */
7422 redisplay_tool_bar (f
)
7427 struct glyph_row
*row
;
7428 int change_height_p
= 0;
7430 /* If frame hasn't a tool-bar window or if it is zero-height, don't
7431 do anything. This means you must start with tool-bar-lines
7432 non-zero to get the auto-sizing effect. Or in other words, you
7433 can turn off tool-bars by specifying tool-bar-lines zero. */
7434 if (!WINDOWP (f
->tool_bar_window
)
7435 || (w
= XWINDOW (f
->tool_bar_window
),
7436 XFASTINT (w
->height
) == 0))
7439 /* Set up an iterator for the tool-bar window. */
7440 init_iterator (&it
, w
, -1, -1, w
->desired_matrix
->rows
, TOOL_BAR_FACE_ID
);
7441 it
.first_visible_x
= 0;
7442 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
7445 /* Build a string that represents the contents of the tool-bar. */
7446 build_desired_tool_bar_string (f
);
7447 reseat_to_string (&it
, NULL
, f
->desired_tool_bar_string
, 0, 0, 0, -1);
7449 /* Display as many lines as needed to display all tool-bar items. */
7450 while (it
.current_y
< it
.last_visible_y
)
7451 display_tool_bar_line (&it
);
7453 /* It doesn't make much sense to try scrolling in the tool-bar
7454 window, so don't do it. */
7455 w
->desired_matrix
->no_scrolling_p
= 1;
7456 w
->must_be_updated_p
= 1;
7458 if (auto_resize_tool_bars_p
)
7462 /* If we couldn't display everything, change the tool-bar's
7464 if (IT_STRING_CHARPOS (it
) < it
.end_charpos
)
7465 change_height_p
= 1;
7467 /* If there are blank lines at the end, except for a partially
7468 visible blank line at the end that is smaller than
7469 CANON_Y_UNIT, change the tool-bar's height. */
7470 row
= it
.glyph_row
- 1;
7471 if (!row
->displays_text_p
7472 && row
->height
>= CANON_Y_UNIT (f
))
7473 change_height_p
= 1;
7475 /* If row displays tool-bar items, but is partially visible,
7476 change the tool-bar's height. */
7477 if (row
->displays_text_p
7478 && MATRIX_ROW_BOTTOM_Y (row
) > it
.last_visible_y
)
7479 change_height_p
= 1;
7481 /* Resize windows as needed by changing the `tool-bar-lines'
7484 && (nlines
= tool_bar_lines_needed (f
),
7485 nlines
!= XFASTINT (w
->height
)))
7487 extern Lisp_Object Qtool_bar_lines
;
7489 int old_height
= XFASTINT (w
->height
);
7491 XSETFRAME (frame
, f
);
7492 clear_glyph_matrix (w
->desired_matrix
);
7493 Fmodify_frame_parameters (frame
,
7494 Fcons (Fcons (Qtool_bar_lines
,
7495 make_number (nlines
)),
7497 if (XFASTINT (w
->height
) != old_height
)
7498 fonts_changed_p
= 1;
7502 return change_height_p
;
7506 /* Get information about the tool-bar item which is displayed in GLYPH
7507 on frame F. Return in *PROP_IDX the index where tool-bar item
7508 properties start in F->tool_bar_items. Value is zero if
7509 GLYPH doesn't display a tool-bar item. */
7512 tool_bar_item_info (f
, glyph
, prop_idx
)
7514 struct glyph
*glyph
;
7520 /* Get the text property `menu-item' at pos. The value of that
7521 property is the start index of this item's properties in
7522 F->tool_bar_items. */
7523 prop
= Fget_text_property (make_number (glyph
->charpos
),
7524 Qmenu_item
, f
->current_tool_bar_string
);
7525 if (INTEGERP (prop
))
7527 *prop_idx
= XINT (prop
);
7536 #endif /* HAVE_WINDOW_SYSTEM */
7540 /************************************************************************
7541 Horizontal scrolling
7542 ************************************************************************/
7544 static int hscroll_window_tree
P_ ((Lisp_Object
));
7545 static int hscroll_windows
P_ ((Lisp_Object
));
7547 /* For all leaf windows in the window tree rooted at WINDOW, set their
7548 hscroll value so that PT is (i) visible in the window, and (ii) so
7549 that it is not within a certain margin at the window's left and
7550 right border. Value is non-zero if any window's hscroll has been
7554 hscroll_window_tree (window
)
7557 int hscrolled_p
= 0;
7559 while (WINDOWP (window
))
7561 struct window
*w
= XWINDOW (window
);
7563 if (WINDOWP (w
->hchild
))
7564 hscrolled_p
|= hscroll_window_tree (w
->hchild
);
7565 else if (WINDOWP (w
->vchild
))
7566 hscrolled_p
|= hscroll_window_tree (w
->vchild
);
7567 else if (w
->cursor
.vpos
>= 0)
7569 int hscroll_margin
, text_area_x
, text_area_y
;
7570 int text_area_width
, text_area_height
;
7571 struct glyph_row
*current_cursor_row
7572 = MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
7573 struct glyph_row
*desired_cursor_row
7574 = MATRIX_ROW (w
->desired_matrix
, w
->cursor
.vpos
);
7575 struct glyph_row
*cursor_row
7576 = (desired_cursor_row
->enabled_p
7577 ? desired_cursor_row
7578 : current_cursor_row
);
7580 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
,
7581 &text_area_width
, &text_area_height
);
7583 /* Scroll when cursor is inside this scroll margin. */
7584 hscroll_margin
= 5 * CANON_X_UNIT (XFRAME (w
->frame
));
7586 if ((XFASTINT (w
->hscroll
)
7587 && w
->cursor
.x
< hscroll_margin
)
7588 || (cursor_row
->enabled_p
7589 && cursor_row
->truncated_on_right_p
7590 && (w
->cursor
.x
> text_area_width
- hscroll_margin
)))
7594 struct buffer
*saved_current_buffer
;
7597 /* Find point in a display of infinite width. */
7598 saved_current_buffer
= current_buffer
;
7599 current_buffer
= XBUFFER (w
->buffer
);
7601 if (w
== XWINDOW (selected_window
))
7602 pt
= BUF_PT (current_buffer
);
7605 pt
= marker_position (w
->pointm
);
7606 pt
= max (BEGV
, pt
);
7610 /* Move iterator to pt starting at cursor_row->start in
7611 a line with infinite width. */
7612 init_to_row_start (&it
, w
, cursor_row
);
7613 it
.last_visible_x
= INFINITY
;
7614 move_it_in_display_line_to (&it
, pt
, -1, MOVE_TO_POS
);
7615 current_buffer
= saved_current_buffer
;
7617 /* Center cursor in window. */
7618 hscroll
= (max (0, it
.current_x
- text_area_width
/ 2)
7619 / CANON_X_UNIT (it
.f
));
7620 hscroll
= max (hscroll
, XFASTINT (w
->min_hscroll
));
7622 /* Don't call Fset_window_hscroll if value hasn't
7623 changed because it will prevent redisplay
7625 if (XFASTINT (w
->hscroll
) != hscroll
)
7627 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
7628 w
->hscroll
= make_number (hscroll
);
7637 /* Value is non-zero if hscroll of any leaf window has been changed. */
7642 /* Set hscroll so that cursor is visible and not inside horizontal
7643 scroll margins for all windows in the tree rooted at WINDOW. See
7644 also hscroll_window_tree above. Value is non-zero if any window's
7645 hscroll has been changed. If it has, desired matrices on the frame
7646 of WINDOW are cleared. */
7649 hscroll_windows (window
)
7654 if (automatic_hscrolling_p
)
7656 hscrolled_p
= hscroll_window_tree (window
);
7658 clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
7667 /************************************************************************
7669 ************************************************************************/
7671 /* Variables holding some state of redisplay if GLYPH_DEBUG is defined
7672 to a non-zero value. This is sometimes handy to have in a debugger
7677 /* First and last unchanged row for try_window_id. */
7679 int debug_first_unchanged_at_end_vpos
;
7680 int debug_last_unchanged_at_beg_vpos
;
7682 /* Delta vpos and y. */
7684 int debug_dvpos
, debug_dy
;
7686 /* Delta in characters and bytes for try_window_id. */
7688 int debug_delta
, debug_delta_bytes
;
7690 /* Values of window_end_pos and window_end_vpos at the end of
7693 int debug_end_pos
, debug_end_vpos
;
7695 /* Append a string to W->desired_matrix->method. FMT is a printf
7696 format string. A1...A9 are a supplement for a variable-length
7697 argument list. If trace_redisplay_p is non-zero also printf the
7698 resulting string to stderr. */
7701 debug_method_add (w
, fmt
, a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
)
7704 int a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
;
7707 char *method
= w
->desired_matrix
->method
;
7708 int len
= strlen (method
);
7709 int size
= sizeof w
->desired_matrix
->method
;
7710 int remaining
= size
- len
- 1;
7712 sprintf (buffer
, fmt
, a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
);
7713 if (len
&& remaining
)
7719 strncpy (method
+ len
, buffer
, remaining
);
7721 if (trace_redisplay_p
)
7722 fprintf (stderr
, "%p (%s): %s\n",
7724 ((BUFFERP (w
->buffer
)
7725 && STRINGP (XBUFFER (w
->buffer
)->name
))
7726 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
7731 #endif /* GLYPH_DEBUG */
7734 /* This counter is used to clear the face cache every once in a while
7735 in redisplay_internal. It is incremented for each redisplay.
7736 Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is
7739 #define CLEAR_FACE_CACHE_COUNT 10000
7740 static int clear_face_cache_count
;
7742 /* Record the previous terminal frame we displayed. */
7744 static struct frame
*previous_terminal_frame
;
7746 /* Non-zero while redisplay_internal is in progress. */
7751 /* Value is non-zero if all changes in window W, which displays
7752 current_buffer, are in the text between START and END. START is a
7753 buffer position, END is given as a distance from Z. Used in
7754 redisplay_internal for display optimization. */
7757 text_outside_line_unchanged_p (w
, start
, end
)
7761 int unchanged_p
= 1;
7763 /* If text or overlays have changed, see where. */
7764 if (XFASTINT (w
->last_modified
) < MODIFF
7765 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
)
7767 /* Gap in the line? */
7768 if (GPT
< start
|| Z
- GPT
< end
)
7771 /* Changes start in front of the line, or end after it? */
7773 && (BEG_UNCHANGED
< start
- 1
7774 || END_UNCHANGED
< end
))
7777 /* If selective display, can't optimize if changes start at the
7778 beginning of the line. */
7780 && INTEGERP (current_buffer
->selective_display
)
7781 && XINT (current_buffer
->selective_display
) > 0
7782 && (BEG_UNCHANGED
< start
|| GPT
<= start
))
7790 /* Do a frame update, taking possible shortcuts into account. This is
7791 the main external entry point for redisplay.
7793 If the last redisplay displayed an echo area message and that message
7794 is no longer requested, we clear the echo area or bring back the
7795 mini-buffer if that is in use. */
7800 redisplay_internal (0);
7803 /* Return 1 if point moved out of or into a composition. Otherwise
7804 return 0. PREV_BUF and PREV_PT are the last point buffer and
7805 position. BUF and PT are the current point buffer and position. */
7808 check_point_in_composition (prev_buf
, prev_pt
, buf
, pt
)
7809 struct buffer
*prev_buf
, *buf
;
7816 XSETBUFFER (buffer
, buf
);
7817 /* Check a composition at the last point if point moved within the
7819 if (prev_buf
== buf
)
7822 /* Point didn't move. */
7825 if (prev_pt
> BUF_BEGV (buf
) && prev_pt
< BUF_ZV (buf
)
7826 && find_composition (prev_pt
, -1, &start
, &end
, &prop
, buffer
)
7827 && COMPOSITION_VALID_P (start
, end
, prop
)
7828 && start
< prev_pt
&& end
> prev_pt
)
7829 /* The last point was within the composition. Return 1 iff
7830 point moved out of the composition. */
7831 return (pt
<= start
|| pt
>= end
);
7834 /* Check a composition at the current point. */
7835 return (pt
> BUF_BEGV (buf
) && pt
< BUF_ZV (buf
)
7836 && find_composition (pt
, -1, &start
, &end
, &prop
, buffer
)
7837 && COMPOSITION_VALID_P (start
, end
, prop
)
7838 && start
< pt
&& end
> pt
);
7841 /* Reconsider the setting of B->clip_changed which is displayed
7845 reconsider_clip_changes (w
, b
)
7849 if (b
->prevent_redisplay_optimizations_p
)
7850 b
->clip_changed
= 1;
7851 else if (b
->clip_changed
7852 && !NILP (w
->window_end_valid
)
7853 && w
->current_matrix
->buffer
== b
7854 && w
->current_matrix
->zv
== BUF_ZV (b
)
7855 && w
->current_matrix
->begv
== BUF_BEGV (b
))
7856 b
->clip_changed
= 0;
7858 /* If display wasn't paused, and W is not a tool bar window, see if
7859 point has been moved into or out of a composition. In that case,
7860 we set b->clip_changed to 1 to force updating the screen. If
7861 b->clip_changed has already been set to 1, we can skip this
7863 if (!b
->clip_changed
7864 && BUFFERP (w
->buffer
) && !NILP (w
->window_end_valid
))
7868 if (w
== XWINDOW (selected_window
))
7869 pt
= BUF_PT (current_buffer
);
7871 pt
= marker_position (w
->pointm
);
7873 if ((w
->current_matrix
->buffer
!= XBUFFER (w
->buffer
)
7874 || pt
!= XINT (w
->last_point
))
7875 && check_point_in_composition (w
->current_matrix
->buffer
,
7876 XINT (w
->last_point
),
7877 XBUFFER (w
->buffer
), pt
))
7878 b
->clip_changed
= 1;
7883 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in
7884 response to any user action; therefore, we should preserve the echo
7885 area. (Actually, our caller does that job.) Perhaps in the future
7886 avoid recentering windows if it is not necessary; currently that
7887 causes some problems. */
7890 redisplay_internal (preserve_echo_area
)
7891 int preserve_echo_area
;
7893 struct window
*w
= XWINDOW (selected_window
);
7894 struct frame
*f
= XFRAME (w
->frame
);
7896 int must_finish
= 0;
7897 struct text_pos tlbufpos
, tlendpos
;
7898 int number_of_visible_frames
;
7900 struct frame
*sf
= SELECTED_FRAME ();
7902 /* Non-zero means redisplay has to consider all windows on all
7903 frames. Zero means, only selected_window is considered. */
7904 int consider_all_windows_p
;
7906 TRACE ((stderr
, "redisplay_internal %d\n", redisplaying_p
));
7908 /* No redisplay if running in batch mode or frame is not yet fully
7909 initialized, or redisplay is explicitly turned off by setting
7910 Vinhibit_redisplay. */
7912 || !NILP (Vinhibit_redisplay
)
7913 || !f
->glyphs_initialized_p
)
7916 /* The flag redisplay_performed_directly_p is set by
7917 direct_output_for_insert when it already did the whole screen
7918 update necessary. */
7919 if (redisplay_performed_directly_p
)
7921 redisplay_performed_directly_p
= 0;
7922 if (!hscroll_windows (selected_window
))
7926 #ifdef USE_X_TOOLKIT
7927 if (popup_activated ())
7931 /* I don't think this happens but let's be paranoid. */
7935 /* Record a function that resets redisplaying_p to its old value
7936 when we leave this function. */
7937 count
= BINDING_STACK_SIZE ();
7938 record_unwind_protect (unwind_redisplay
, make_number (redisplaying_p
));
7943 reconsider_clip_changes (w
, current_buffer
);
7945 /* If new fonts have been loaded that make a glyph matrix adjustment
7946 necessary, do it. */
7947 if (fonts_changed_p
)
7949 adjust_glyphs (NULL
);
7950 ++windows_or_buffers_changed
;
7951 fonts_changed_p
= 0;
7954 if (! FRAME_WINDOW_P (sf
)
7955 && previous_terminal_frame
!= sf
)
7957 /* Since frames on an ASCII terminal share the same display
7958 area, displaying a different frame means redisplay the whole
7960 windows_or_buffers_changed
++;
7961 SET_FRAME_GARBAGED (sf
);
7962 XSETFRAME (Vterminal_frame
, sf
);
7964 previous_terminal_frame
= sf
;
7966 /* Set the visible flags for all frames. Do this before checking
7967 for resized or garbaged frames; they want to know if their frames
7968 are visible. See the comment in frame.h for
7969 FRAME_SAMPLE_VISIBILITY. */
7971 Lisp_Object tail
, frame
;
7973 number_of_visible_frames
= 0;
7975 FOR_EACH_FRAME (tail
, frame
)
7977 struct frame
*f
= XFRAME (frame
);
7979 FRAME_SAMPLE_VISIBILITY (f
);
7980 if (FRAME_VISIBLE_P (f
))
7981 ++number_of_visible_frames
;
7982 clear_desired_matrices (f
);
7986 /* Notice any pending interrupt request to change frame size. */
7987 do_pending_window_change (1);
7989 /* Clear frames marked as garbaged. */
7991 clear_garbaged_frames ();
7993 /* Build menubar and tool-bar items. */
7994 prepare_menu_bars ();
7996 if (windows_or_buffers_changed
)
7997 update_mode_lines
++;
7999 /* Detect case that we need to write or remove a star in the mode line. */
8000 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
8002 w
->update_mode_line
= Qt
;
8003 if (buffer_shared
> 1)
8004 update_mode_lines
++;
8007 /* If %c is in the mode line, update it if needed. */
8008 if (!NILP (w
->column_number_displayed
)
8009 /* This alternative quickly identifies a common case
8010 where no change is needed. */
8011 && !(PT
== XFASTINT (w
->last_point
)
8012 && XFASTINT (w
->last_modified
) >= MODIFF
8013 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
8014 && XFASTINT (w
->column_number_displayed
) != current_column ())
8015 w
->update_mode_line
= Qt
;
8017 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
8019 /* The variable buffer_shared is set in redisplay_window and
8020 indicates that we redisplay a buffer in different windows. See
8022 consider_all_windows_p
= update_mode_lines
|| buffer_shared
> 1;
8024 /* If specs for an arrow have changed, do thorough redisplay
8025 to ensure we remove any arrow that should no longer exist. */
8026 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
8027 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
8028 consider_all_windows_p
= windows_or_buffers_changed
= 1;
8030 /* Normally the message* functions will have already displayed and
8031 updated the echo area, but the frame may have been trashed, or
8032 the update may have been preempted, so display the echo area
8033 again here. Checking both message buffers captures the case that
8034 the echo area should be cleared. */
8035 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
8037 int window_height_changed_p
= echo_area_display (0);
8040 if (fonts_changed_p
)
8042 else if (window_height_changed_p
)
8044 consider_all_windows_p
= 1;
8045 ++update_mode_lines
;
8046 ++windows_or_buffers_changed
;
8048 /* If window configuration was changed, frames may have been
8049 marked garbaged. Clear them or we will experience
8050 surprises wrt scrolling. */
8052 clear_garbaged_frames ();
8055 else if (EQ (selected_window
, minibuf_window
)
8056 && (current_buffer
->clip_changed
8057 || XFASTINT (w
->last_modified
) < MODIFF
8058 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
)
8059 && resize_mini_window (w
, 0))
8061 /* Resized active mini-window to fit the size of what it is
8062 showing if its contents might have changed. */
8064 consider_all_windows_p
= 1;
8065 ++windows_or_buffers_changed
;
8066 ++update_mode_lines
;
8068 /* If window configuration was changed, frames may have been
8069 marked garbaged. Clear them or we will experience
8070 surprises wrt scrolling. */
8072 clear_garbaged_frames ();
8076 /* If showing the region, and mark has changed, we must redisplay
8077 the whole window. The assignment to this_line_start_pos prevents
8078 the optimization directly below this if-statement. */
8079 if (((!NILP (Vtransient_mark_mode
)
8080 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
8081 != !NILP (w
->region_showing
))
8082 || (!NILP (w
->region_showing
)
8083 && !EQ (w
->region_showing
,
8084 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
8085 CHARPOS (this_line_start_pos
) = 0;
8087 /* Optimize the case that only the line containing the cursor in the
8088 selected window has changed. Variables starting with this_ are
8089 set in display_line and record information about the line
8090 containing the cursor. */
8091 tlbufpos
= this_line_start_pos
;
8092 tlendpos
= this_line_end_pos
;
8093 if (!consider_all_windows_p
8094 && CHARPOS (tlbufpos
) > 0
8095 && NILP (w
->update_mode_line
)
8096 && !current_buffer
->clip_changed
8097 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
8098 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
8099 /* Make sure recorded data applies to current buffer, etc. */
8100 && this_line_buffer
== current_buffer
8101 && current_buffer
== XBUFFER (w
->buffer
)
8102 && NILP (w
->force_start
)
8103 /* Point must be on the line that we have info recorded about. */
8104 && PT
>= CHARPOS (tlbufpos
)
8105 && PT
<= Z
- CHARPOS (tlendpos
)
8106 /* All text outside that line, including its final newline,
8107 must be unchanged */
8108 && text_outside_line_unchanged_p (w
, CHARPOS (tlbufpos
),
8109 CHARPOS (tlendpos
)))
8111 if (CHARPOS (tlbufpos
) > BEGV
8112 && FETCH_BYTE (BYTEPOS (tlbufpos
) - 1) != '\n'
8113 && (CHARPOS (tlbufpos
) == ZV
8114 || FETCH_BYTE (BYTEPOS (tlbufpos
)) == '\n'))
8115 /* Former continuation line has disappeared by becoming empty */
8117 else if (XFASTINT (w
->last_modified
) < MODIFF
8118 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
8119 || MINI_WINDOW_P (w
))
8121 /* We have to handle the case of continuation around a
8122 wide-column character (See the comment in indent.c around
8125 For instance, in the following case:
8127 -------- Insert --------
8128 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
8129 J_I_ ==> J_I_ `^^' are cursors.
8133 As we have to redraw the line above, we should goto cancel. */
8136 int line_height_before
= this_line_pixel_height
;
8138 /* Note that start_display will handle the case that the
8139 line starting at tlbufpos is a continuation lines. */
8140 start_display (&it
, w
, tlbufpos
);
8142 /* Implementation note: It this still necessary? */
8143 if (it
.current_x
!= this_line_start_x
)
8146 TRACE ((stderr
, "trying display optimization 1\n"));
8147 w
->cursor
.vpos
= -1;
8148 overlay_arrow_seen
= 0;
8149 it
.vpos
= this_line_vpos
;
8150 it
.current_y
= this_line_y
;
8151 it
.glyph_row
= MATRIX_ROW (w
->desired_matrix
, this_line_vpos
);
8154 /* If line contains point, is not continued,
8155 and ends at same distance from eob as before, we win */
8156 if (w
->cursor
.vpos
>= 0
8157 /* Line is not continued, otherwise this_line_start_pos
8158 would have been set to 0 in display_line. */
8159 && CHARPOS (this_line_start_pos
)
8160 /* Line ends as before. */
8161 && CHARPOS (this_line_end_pos
) == CHARPOS (tlendpos
)
8162 /* Line has same height as before. Otherwise other lines
8163 would have to be shifted up or down. */
8164 && this_line_pixel_height
== line_height_before
)
8166 /* If this is not the window's last line, we must adjust
8167 the charstarts of the lines below. */
8168 if (it
.current_y
< it
.last_visible_y
)
8170 struct glyph_row
*row
8171 = MATRIX_ROW (w
->current_matrix
, this_line_vpos
+ 1);
8172 int delta
, delta_bytes
;
8174 if (Z
- CHARPOS (tlendpos
) == ZV
)
8176 /* This line ends at end of (accessible part of)
8177 buffer. There is no newline to count. */
8179 - CHARPOS (tlendpos
)
8180 - MATRIX_ROW_START_CHARPOS (row
));
8181 delta_bytes
= (Z_BYTE
8182 - BYTEPOS (tlendpos
)
8183 - MATRIX_ROW_START_BYTEPOS (row
));
8187 /* This line ends in a newline. Must take
8188 account of the newline and the rest of the
8189 text that follows. */
8191 - CHARPOS (tlendpos
)
8192 - MATRIX_ROW_START_CHARPOS (row
));
8193 delta_bytes
= (Z_BYTE
8194 - BYTEPOS (tlendpos
)
8195 - MATRIX_ROW_START_BYTEPOS (row
));
8198 increment_matrix_positions (w
->current_matrix
,
8200 w
->current_matrix
->nrows
,
8201 delta
, delta_bytes
);
8204 /* If this row displays text now but previously didn't,
8205 or vice versa, w->window_end_vpos may have to be
8207 if ((it
.glyph_row
- 1)->displays_text_p
)
8209 if (XFASTINT (w
->window_end_vpos
) < this_line_vpos
)
8210 XSETINT (w
->window_end_vpos
, this_line_vpos
);
8212 else if (XFASTINT (w
->window_end_vpos
) == this_line_vpos
8213 && this_line_vpos
> 0)
8214 XSETINT (w
->window_end_vpos
, this_line_vpos
- 1);
8215 w
->window_end_valid
= Qnil
;
8217 /* Update hint: No need to try to scroll in update_window. */
8218 w
->desired_matrix
->no_scrolling_p
= 1;
8221 *w
->desired_matrix
->method
= 0;
8222 debug_method_add (w
, "optimization 1");
8229 else if (/* Cursor position hasn't changed. */
8230 PT
== XFASTINT (w
->last_point
)
8231 /* Make sure the cursor was last displayed
8232 in this window. Otherwise we have to reposition it. */
8233 && 0 <= w
->cursor
.vpos
8234 && XINT (w
->height
) > w
->cursor
.vpos
)
8238 do_pending_window_change (1);
8240 /* We used to always goto end_of_redisplay here, but this
8241 isn't enough if we have a blinking cursor. */
8242 if (w
->cursor_off_p
== w
->last_cursor_off_p
)
8243 goto end_of_redisplay
;
8247 /* If highlighting the region, or if the cursor is in the echo area,
8248 then we can't just move the cursor. */
8249 else if (! (!NILP (Vtransient_mark_mode
)
8250 && !NILP (current_buffer
->mark_active
))
8251 && (EQ (selected_window
, current_buffer
->last_selected_window
)
8252 || highlight_nonselected_windows
)
8253 && NILP (w
->region_showing
)
8254 && NILP (Vshow_trailing_whitespace
)
8255 && !cursor_in_echo_area
)
8258 struct glyph_row
*row
;
8260 /* Skip from tlbufpos to PT and see where it is. Note that
8261 PT may be in invisible text. If so, we will end at the
8262 next visible position. */
8263 init_iterator (&it
, w
, CHARPOS (tlbufpos
), BYTEPOS (tlbufpos
),
8264 NULL
, DEFAULT_FACE_ID
);
8265 it
.current_x
= this_line_start_x
;
8266 it
.current_y
= this_line_y
;
8267 it
.vpos
= this_line_vpos
;
8269 /* The call to move_it_to stops in front of PT, but
8270 moves over before-strings. */
8271 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
8273 if (it
.vpos
== this_line_vpos
8274 && (row
= MATRIX_ROW (w
->current_matrix
, this_line_vpos
),
8277 xassert (this_line_vpos
== it
.vpos
);
8278 xassert (this_line_y
== it
.current_y
);
8279 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
8287 /* Text changed drastically or point moved off of line. */
8288 SET_MATRIX_ROW_ENABLED_P (w
->desired_matrix
, this_line_vpos
, 0);
8291 CHARPOS (this_line_start_pos
) = 0;
8292 consider_all_windows_p
|= buffer_shared
> 1;
8293 ++clear_face_cache_count
;
8296 /* Build desired matrices, and update the display. If
8297 consider_all_windows_p is non-zero, do it for all windows on all
8298 frames. Otherwise do it for selected_window, only. */
8300 if (consider_all_windows_p
)
8302 Lisp_Object tail
, frame
;
8304 /* Clear the face cache eventually. */
8305 if (clear_face_cache_count
> CLEAR_FACE_CACHE_COUNT
)
8307 clear_face_cache (0);
8308 clear_face_cache_count
= 0;
8311 /* Recompute # windows showing selected buffer. This will be
8312 incremented each time such a window is displayed. */
8315 FOR_EACH_FRAME (tail
, frame
)
8317 struct frame
*f
= XFRAME (frame
);
8319 if (FRAME_WINDOW_P (f
) || f
== sf
)
8321 /* Mark all the scroll bars to be removed; we'll redeem
8322 the ones we want when we redisplay their windows. */
8323 if (condemn_scroll_bars_hook
)
8324 condemn_scroll_bars_hook (f
);
8326 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
8327 redisplay_windows (FRAME_ROOT_WINDOW (f
));
8329 /* Any scroll bars which redisplay_windows should have
8330 nuked should now go away. */
8331 if (judge_scroll_bars_hook
)
8332 judge_scroll_bars_hook (f
);
8334 /* If fonts changed, display again. */
8335 if (fonts_changed_p
)
8338 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
8340 /* See if we have to hscroll. */
8341 if (hscroll_windows (f
->root_window
))
8344 /* Prevent various kinds of signals during display
8345 update. stdio is not robust about handling
8346 signals, which can cause an apparent I/O
8348 if (interrupt_input
)
8352 /* Update the display. */
8353 set_window_update_flags (XWINDOW (f
->root_window
), 1);
8354 pause
|= update_frame (f
, 0, 0);
8358 mark_window_display_accurate (f
->root_window
, 1);
8359 if (frame_up_to_date_hook
)
8360 frame_up_to_date_hook (f
);
8365 else if (FRAME_VISIBLE_P (sf
) && !FRAME_OBSCURED_P (sf
))
8367 Lisp_Object mini_window
;
8368 struct frame
*mini_frame
;
8370 redisplay_window (selected_window
, 1);
8372 /* Compare desired and current matrices, perform output. */
8375 /* If fonts changed, display again. */
8376 if (fonts_changed_p
)
8379 /* Prevent various kinds of signals during display update.
8380 stdio is not robust about handling signals,
8381 which can cause an apparent I/O error. */
8382 if (interrupt_input
)
8386 if (FRAME_VISIBLE_P (sf
) && !FRAME_OBSCURED_P (sf
))
8388 if (hscroll_windows (selected_window
))
8391 XWINDOW (selected_window
)->must_be_updated_p
= 1;
8392 pause
= update_frame (sf
, 0, 0);
8395 /* We may have called echo_area_display at the top of this
8396 function. If the echo area is on another frame, that may
8397 have put text on a frame other than the selected one, so the
8398 above call to update_frame would not have caught it. Catch
8400 mini_window
= FRAME_MINIBUF_WINDOW (sf
);
8401 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
8403 if (mini_frame
!= sf
&& FRAME_WINDOW_P (mini_frame
))
8405 XWINDOW (mini_window
)->must_be_updated_p
= 1;
8406 pause
|= update_frame (mini_frame
, 0, 0);
8407 if (!pause
&& hscroll_windows (mini_window
))
8412 /* If display was paused because of pending input, make sure we do a
8413 thorough update the next time. */
8416 /* Prevent the optimization at the beginning of
8417 redisplay_internal that tries a single-line update of the
8418 line containing the cursor in the selected window. */
8419 CHARPOS (this_line_start_pos
) = 0;
8421 /* Let the overlay arrow be updated the next time. */
8422 if (!NILP (last_arrow_position
))
8424 last_arrow_position
= Qt
;
8425 last_arrow_string
= Qt
;
8428 /* If we pause after scrolling, some rows in the current
8429 matrices of some windows are not valid. */
8430 if (!WINDOW_FULL_WIDTH_P (w
)
8431 && !FRAME_WINDOW_P (XFRAME (w
->frame
)))
8432 update_mode_lines
= 1;
8435 /* Now text on frame agrees with windows, so put info into the
8436 windows for partial redisplay to follow. */
8439 register struct buffer
*b
= XBUFFER (w
->buffer
);
8441 BUF_UNCHANGED_MODIFIED (b
) = BUF_MODIFF (b
);
8442 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = BUF_OVERLAY_MODIFF (b
);
8443 BUF_BEG_UNCHANGED (b
) = BUF_GPT (b
) - BUF_BEG (b
);
8444 BUF_END_UNCHANGED (b
) = BUF_Z (b
) - BUF_GPT (b
);
8446 if (consider_all_windows_p
)
8447 mark_window_display_accurate (FRAME_ROOT_WINDOW (sf
), 1);
8450 XSETFASTINT (w
->last_point
, BUF_PT (b
));
8451 w
->last_cursor
= w
->cursor
;
8452 w
->last_cursor_off_p
= w
->cursor_off_p
;
8454 b
->clip_changed
= 0;
8455 b
->prevent_redisplay_optimizations_p
= 0;
8456 w
->update_mode_line
= Qnil
;
8457 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
8458 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
8460 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
8463 /* Record if we are showing a region, so can make sure to
8464 update it fully at next redisplay. */
8465 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
8466 && (EQ (selected_window
,
8467 current_buffer
->last_selected_window
)
8468 || highlight_nonselected_windows
)
8469 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
8470 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
8473 w
->window_end_valid
= w
->buffer
;
8474 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
8475 last_arrow_string
= Voverlay_arrow_string
;
8476 if (frame_up_to_date_hook
!= 0)
8477 (*frame_up_to_date_hook
) (sf
);
8479 w
->current_matrix
->buffer
= b
;
8480 w
->current_matrix
->begv
= BUF_BEGV (b
);
8481 w
->current_matrix
->zv
= BUF_ZV (b
);
8484 update_mode_lines
= 0;
8485 windows_or_buffers_changed
= 0;
8488 /* Start SIGIO interrupts coming again. Having them off during the
8489 code above makes it less likely one will discard output, but not
8490 impossible, since there might be stuff in the system buffer here.
8491 But it is much hairier to try to do anything about that. */
8492 if (interrupt_input
)
8496 /* If a frame has become visible which was not before, redisplay
8497 again, so that we display it. Expose events for such a frame
8498 (which it gets when becoming visible) don't call the parts of
8499 redisplay constructing glyphs, so simply exposing a frame won't
8500 display anything in this case. So, we have to display these
8501 frames here explicitly. */
8504 Lisp_Object tail
, frame
;
8507 FOR_EACH_FRAME (tail
, frame
)
8509 int this_is_visible
= 0;
8511 if (XFRAME (frame
)->visible
)
8512 this_is_visible
= 1;
8513 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
8514 if (XFRAME (frame
)->visible
)
8515 this_is_visible
= 1;
8517 if (this_is_visible
)
8521 if (new_count
!= number_of_visible_frames
)
8522 windows_or_buffers_changed
++;
8525 /* Change frame size now if a change is pending. */
8526 do_pending_window_change (1);
8528 /* If we just did a pending size change, or have additional
8529 visible frames, redisplay again. */
8530 if (windows_or_buffers_changed
&& !pause
)
8535 unbind_to (count
, Qnil
);
8539 /* Redisplay, but leave alone any recent echo area message unless
8540 another message has been requested in its place.
8542 This is useful in situations where you need to redisplay but no
8543 user action has occurred, making it inappropriate for the message
8544 area to be cleared. See tracking_off and
8545 wait_reading_process_input for examples of these situations.
8547 FROM_WHERE is an integer saying from where this function was
8548 called. This is useful for debugging. */
8551 redisplay_preserve_echo_area (from_where
)
8554 TRACE ((stderr
, "redisplay_preserve_echo_area (%d)\n", from_where
));
8556 if (!NILP (echo_area_buffer
[1]))
8558 /* We have a previously displayed message, but no current
8559 message. Redisplay the previous message. */
8560 display_last_displayed_message_p
= 1;
8561 redisplay_internal (1);
8562 display_last_displayed_message_p
= 0;
8565 redisplay_internal (1);
8569 /* Function registered with record_unwind_protect in
8570 redisplay_internal. Clears the flag indicating that a redisplay is
8574 unwind_redisplay (old_redisplaying_p
)
8575 Lisp_Object old_redisplaying_p
;
8577 redisplaying_p
= XFASTINT (old_redisplaying_p
);
8582 /* Mark the display of windows in the window tree rooted at WINDOW as
8583 accurate or inaccurate. If FLAG is non-zero mark display of WINDOW
8584 as accurate. If FLAG is zero arrange for WINDOW to be redisplayed
8585 the next time redisplay_internal is called. */
8588 mark_window_display_accurate (window
, accurate_p
)
8594 for (; !NILP (window
); window
= w
->next
)
8596 w
= XWINDOW (window
);
8598 if (BUFFERP (w
->buffer
))
8600 struct buffer
*b
= XBUFFER (w
->buffer
);
8602 XSETFASTINT (w
->last_modified
,
8603 accurate_p
? BUF_MODIFF (b
) : 0);
8604 XSETFASTINT (w
->last_overlay_modified
,
8605 accurate_p
? BUF_OVERLAY_MODIFF (b
) : 0);
8606 w
->last_had_star
= (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
)
8609 #if 0 /* I don't think this is necessary because display_line does it.
8611 /* Record if we are showing a region, so can make sure to
8612 update it fully at next redisplay. */
8614 = (!NILP (Vtransient_mark_mode
)
8615 && (w
== XWINDOW (current_buffer
->last_selected_window
)
8616 || highlight_nonselected_windows
)
8617 && (!NILP (b
->mark_active
)
8618 ? Fmarker_position (b
->mark
)
8624 b
->clip_changed
= 0;
8625 b
->prevent_redisplay_optimizations_p
= 0;
8626 w
->current_matrix
->buffer
= b
;
8627 w
->current_matrix
->begv
= BUF_BEGV (b
);
8628 w
->current_matrix
->zv
= BUF_ZV (b
);
8629 w
->last_cursor
= w
->cursor
;
8630 w
->last_cursor_off_p
= w
->cursor_off_p
;
8631 if (w
== XWINDOW (selected_window
))
8632 w
->last_point
= make_number (BUF_PT (b
));
8634 w
->last_point
= make_number (XMARKER (w
->pointm
)->charpos
);
8638 w
->window_end_valid
= w
->buffer
;
8639 w
->update_mode_line
= Qnil
;
8641 if (!NILP (w
->vchild
))
8642 mark_window_display_accurate (w
->vchild
, accurate_p
);
8643 if (!NILP (w
->hchild
))
8644 mark_window_display_accurate (w
->hchild
, accurate_p
);
8649 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
8650 last_arrow_string
= Voverlay_arrow_string
;
8654 /* Force a thorough redisplay the next time by setting
8655 last_arrow_position and last_arrow_string to t, which is
8656 unequal to any useful value of Voverlay_arrow_... */
8657 last_arrow_position
= Qt
;
8658 last_arrow_string
= Qt
;
8663 /* Return value in display table DP (Lisp_Char_Table *) for character
8664 C. Since a display table doesn't have any parent, we don't have to
8665 follow parent. Do not call this function directly but use the
8666 macro DISP_CHAR_VECTOR. */
8669 disp_char_vector (dp
, c
)
8670 struct Lisp_Char_Table
*dp
;
8676 if (SINGLE_BYTE_CHAR_P (c
))
8677 return (dp
->contents
[c
]);
8679 SPLIT_CHAR (c
, code
[0], code
[1], code
[2]);
8682 else if (code
[2] < 32)
8685 /* Here, the possible range of code[0] (== charset ID) is
8686 128..max_charset. Since the top level char table contains data
8687 for multibyte characters after 256th element, we must increment
8688 code[0] by 128 to get a correct index. */
8690 code
[3] = -1; /* anchor */
8692 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
8694 val
= dp
->contents
[code
[i
]];
8695 if (!SUB_CHAR_TABLE_P (val
))
8696 return (NILP (val
) ? dp
->defalt
: val
);
8699 /* Here, val is a sub char table. We return the default value of
8701 return (dp
->defalt
);
8706 /***********************************************************************
8708 ***********************************************************************/
8710 /* Redisplay all leaf windows in the window tree rooted at WINDOW. */
8713 redisplay_windows (window
)
8716 while (!NILP (window
))
8718 struct window
*w
= XWINDOW (window
);
8720 if (!NILP (w
->hchild
))
8721 redisplay_windows (w
->hchild
);
8722 else if (!NILP (w
->vchild
))
8723 redisplay_windows (w
->vchild
);
8725 redisplay_window (window
, 0);
8732 /* Set cursor position of W. PT is assumed to be displayed in ROW.
8733 DELTA is the number of bytes by which positions recorded in ROW
8734 differ from current buffer positions. */
8737 set_cursor_from_row (w
, row
, matrix
, delta
, delta_bytes
, dy
, dvpos
)
8739 struct glyph_row
*row
;
8740 struct glyph_matrix
*matrix
;
8741 int delta
, delta_bytes
, dy
, dvpos
;
8743 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
8744 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
8746 int pt_old
= PT
- delta
;
8748 /* Skip over glyphs not having an object at the start of the row.
8749 These are special glyphs like truncation marks on terminal
8751 if (row
->displays_text_p
)
8753 && INTEGERP (glyph
->object
)
8754 && glyph
->charpos
< 0)
8756 x
+= glyph
->pixel_width
;
8761 && !INTEGERP (glyph
->object
)
8762 && (!BUFFERP (glyph
->object
)
8763 || glyph
->charpos
< pt_old
))
8765 x
+= glyph
->pixel_width
;
8769 w
->cursor
.hpos
= glyph
- row
->glyphs
[TEXT_AREA
];
8771 w
->cursor
.vpos
= MATRIX_ROW_VPOS (row
, matrix
) + dvpos
;
8772 w
->cursor
.y
= row
->y
+ dy
;
8774 if (w
== XWINDOW (selected_window
))
8776 if (!row
->continued_p
8777 && !MATRIX_ROW_CONTINUATION_LINE_P (row
)
8780 this_line_buffer
= XBUFFER (w
->buffer
);
8782 CHARPOS (this_line_start_pos
)
8783 = MATRIX_ROW_START_CHARPOS (row
) + delta
;
8784 BYTEPOS (this_line_start_pos
)
8785 = MATRIX_ROW_START_BYTEPOS (row
) + delta_bytes
;
8787 CHARPOS (this_line_end_pos
)
8788 = Z
- (MATRIX_ROW_END_CHARPOS (row
) + delta
);
8789 BYTEPOS (this_line_end_pos
)
8790 = Z_BYTE
- (MATRIX_ROW_END_BYTEPOS (row
) + delta_bytes
);
8792 this_line_y
= w
->cursor
.y
;
8793 this_line_pixel_height
= row
->height
;
8794 this_line_vpos
= w
->cursor
.vpos
;
8795 this_line_start_x
= row
->x
;
8798 CHARPOS (this_line_start_pos
) = 0;
8803 /* Run window scroll functions, if any, for WINDOW with new window
8804 start STARTP. Sets the window start of WINDOW to that position.
8806 We assume that the window's buffer is really current. */
8808 static INLINE
struct text_pos
8809 run_window_scroll_functions (window
, startp
)
8811 struct text_pos startp
;
8813 struct window
*w
= XWINDOW (window
);
8814 SET_MARKER_FROM_TEXT_POS (w
->start
, startp
);
8816 if (current_buffer
!= XBUFFER (w
->buffer
))
8819 if (!NILP (Vwindow_scroll_functions
))
8821 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
8822 make_number (CHARPOS (startp
)));
8823 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
8824 /* In case the hook functions switch buffers. */
8825 if (current_buffer
!= XBUFFER (w
->buffer
))
8826 set_buffer_internal_1 (XBUFFER (w
->buffer
));
8833 /* Modify the desired matrix of window W and W->vscroll so that the
8834 line containing the cursor is fully visible. */
8837 make_cursor_line_fully_visible (w
)
8840 struct glyph_matrix
*matrix
;
8841 struct glyph_row
*row
;
8844 /* It's not always possible to find the cursor, e.g, when a window
8845 is full of overlay strings. Don't do anything in that case. */
8846 if (w
->cursor
.vpos
< 0)
8849 matrix
= w
->desired_matrix
;
8850 row
= MATRIX_ROW (matrix
, w
->cursor
.vpos
);
8852 /* If the cursor row is not partially visible, there's nothing
8854 if (!MATRIX_ROW_PARTIALLY_VISIBLE_P (row
))
8857 /* If the row the cursor is in is taller than the window's height,
8858 it's not clear what to do, so do nothing. */
8859 window_height
= window_box_height (w
);
8860 if (row
->height
>= window_height
)
8863 if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w
, row
))
8865 int dy
= row
->height
- row
->visible_height
;
8868 shift_glyph_matrix (w
, matrix
, 0, matrix
->nrows
, dy
);
8870 else /* MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row)) */
8872 int dy
= - (row
->height
- row
->visible_height
);
8875 shift_glyph_matrix (w
, matrix
, 0, matrix
->nrows
, dy
);
8878 /* When we change the cursor y-position of the selected window,
8879 change this_line_y as well so that the display optimization for
8880 the cursor line of the selected window in redisplay_internal uses
8881 the correct y-position. */
8882 if (w
== XWINDOW (selected_window
))
8883 this_line_y
= w
->cursor
.y
;
8887 /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P
8888 non-zero means only WINDOW is redisplayed in redisplay_internal.
8889 TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used
8890 in redisplay_window to bring a partially visible line into view in
8891 the case that only the cursor has moved.
8895 1 if scrolling succeeded
8897 0 if scrolling didn't find point.
8899 -1 if new fonts have been loaded so that we must interrupt
8900 redisplay, adjust glyph matrices, and try again. */
8903 try_scrolling (window
, just_this_one_p
, scroll_conservatively
,
8904 scroll_step
, temp_scroll_step
)
8906 int just_this_one_p
;
8907 int scroll_conservatively
, scroll_step
;
8908 int temp_scroll_step
;
8910 struct window
*w
= XWINDOW (window
);
8911 struct frame
*f
= XFRAME (w
->frame
);
8912 struct text_pos scroll_margin_pos
;
8913 struct text_pos pos
;
8914 struct text_pos startp
;
8916 Lisp_Object window_end
;
8917 int this_scroll_margin
;
8921 int amount_to_scroll
= 0;
8922 Lisp_Object aggressive
;
8926 debug_method_add (w
, "try_scrolling");
8929 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
8931 /* Compute scroll margin height in pixels. We scroll when point is
8932 within this distance from the top or bottom of the window. */
8933 if (scroll_margin
> 0)
8935 this_scroll_margin
= min (scroll_margin
, XINT (w
->height
) / 4);
8936 this_scroll_margin
*= CANON_Y_UNIT (f
);
8939 this_scroll_margin
= 0;
8941 /* Compute how much we should try to scroll maximally to bring point
8943 if (scroll_step
|| scroll_conservatively
|| temp_scroll_step
)
8944 scroll_max
= max (scroll_step
,
8945 max (scroll_conservatively
, temp_scroll_step
));
8946 else if (NUMBERP (current_buffer
->scroll_down_aggressively
)
8947 || NUMBERP (current_buffer
->scroll_up_aggressively
))
8948 /* We're trying to scroll because of aggressive scrolling
8949 but no scroll_step is set. Choose an arbitrary one. Maybe
8950 there should be a variable for this. */
8954 scroll_max
*= CANON_Y_UNIT (f
);
8956 /* Decide whether we have to scroll down. Start at the window end
8957 and move this_scroll_margin up to find the position of the scroll
8959 window_end
= Fwindow_end (window
, Qt
);
8960 CHARPOS (scroll_margin_pos
) = XINT (window_end
);
8961 BYTEPOS (scroll_margin_pos
) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos
));
8962 if (this_scroll_margin
)
8964 start_display (&it
, w
, scroll_margin_pos
);
8965 move_it_vertically (&it
, - this_scroll_margin
);
8966 scroll_margin_pos
= it
.current
.pos
;
8969 if (PT
>= CHARPOS (scroll_margin_pos
))
8976 /* Point is in the scroll margin at the bottom of the window, or
8977 below. Compute a new window start that makes point visible. */
8979 /* Compute the distance from the scroll margin to PT.
8980 Give up if the distance is greater than scroll_max. */
8981 start_display (&it
, w
, scroll_margin_pos
);
8983 move_it_to (&it
, PT
, 0, it
.last_visible_y
, -1,
8984 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
8985 #if 0 /* Taking the line's height into account here looks wrong. */
8986 line_height
= (it
.max_ascent
+ it
.max_descent
8987 ? it
.max_ascent
+ it
.max_descent
8989 dy
= it
.current_y
+ line_height
- y0
;
8991 /* With a scroll_margin of 0, scroll_margin_pos is at the window
8992 end, which is one line below the window. The iterator's
8993 current_y will be same as y0 in that case, but we have to
8994 scroll a line to make PT visible. That's the reason why 1 is
8996 dy
= 1 + it
.current_y
- y0
;
8999 if (dy
> scroll_max
)
9002 /* Move the window start down. If scrolling conservatively,
9003 move it just enough down to make point visible. If
9004 scroll_step is set, move it down by scroll_step. */
9005 start_display (&it
, w
, startp
);
9007 if (scroll_conservatively
)
9009 max (dy
, CANON_Y_UNIT (f
) * max (scroll_step
, temp_scroll_step
));
9010 else if (scroll_step
|| temp_scroll_step
)
9011 amount_to_scroll
= scroll_max
;
9014 aggressive
= current_buffer
->scroll_down_aggressively
;
9015 height
= (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
)
9016 - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
));
9017 if (NUMBERP (aggressive
))
9018 amount_to_scroll
= XFLOATINT (aggressive
) * height
;
9021 if (amount_to_scroll
<= 0)
9024 move_it_vertically (&it
, amount_to_scroll
);
9025 startp
= it
.current
.pos
;
9029 /* See if point is inside the scroll margin at the top of the
9031 scroll_margin_pos
= startp
;
9032 if (this_scroll_margin
)
9034 start_display (&it
, w
, startp
);
9035 move_it_vertically (&it
, this_scroll_margin
);
9036 scroll_margin_pos
= it
.current
.pos
;
9039 if (PT
< CHARPOS (scroll_margin_pos
))
9041 /* Point is in the scroll margin at the top of the window or
9042 above what is displayed in the window. */
9045 /* Compute the vertical distance from PT to the scroll
9046 margin position. Give up if distance is greater than
9048 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
9049 start_display (&it
, w
, pos
);
9051 move_it_to (&it
, CHARPOS (scroll_margin_pos
), 0,
9052 it
.last_visible_y
, -1,
9053 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
9054 dy
= it
.current_y
- y0
;
9055 if (dy
> scroll_max
)
9058 /* Compute new window start. */
9059 start_display (&it
, w
, startp
);
9061 if (scroll_conservatively
)
9063 max (dy
, CANON_Y_UNIT (f
) * max (scroll_step
, temp_scroll_step
));
9064 else if (scroll_step
|| temp_scroll_step
)
9065 amount_to_scroll
= scroll_max
;
9068 aggressive
= current_buffer
->scroll_up_aggressively
;
9069 height
= (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
)
9070 - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
));
9071 if (NUMBERP (aggressive
))
9072 amount_to_scroll
= XFLOATINT (aggressive
) * height
;
9075 if (amount_to_scroll
<= 0)
9078 move_it_vertically (&it
, - amount_to_scroll
);
9079 startp
= it
.current
.pos
;
9083 /* Run window scroll functions. */
9084 startp
= run_window_scroll_functions (window
, startp
);
9086 /* Display the window. Give up if new fonts are loaded, or if point
9088 if (!try_window (window
, startp
))
9090 else if (w
->cursor
.vpos
< 0)
9092 clear_glyph_matrix (w
->desired_matrix
);
9097 /* Maybe forget recorded base line for line number display. */
9098 if (!just_this_one_p
9099 || current_buffer
->clip_changed
9100 || BEG_UNCHANGED
< CHARPOS (startp
))
9101 w
->base_line_number
= Qnil
;
9103 /* If cursor ends up on a partially visible line, shift display
9104 lines up or down. */
9105 make_cursor_line_fully_visible (w
);
9113 /* Compute a suitable window start for window W if display of W starts
9114 on a continuation line. Value is non-zero if a new window start
9117 The new window start will be computed, based on W's width, starting
9118 from the start of the continued line. It is the start of the
9119 screen line with the minimum distance from the old start W->start. */
9122 compute_window_start_on_continuation_line (w
)
9125 struct text_pos pos
, start_pos
;
9126 int window_start_changed_p
= 0;
9128 SET_TEXT_POS_FROM_MARKER (start_pos
, w
->start
);
9130 /* If window start is on a continuation line... Window start may be
9131 < BEGV in case there's invisible text at the start of the
9132 buffer (M-x rmail, for example). */
9133 if (CHARPOS (start_pos
) > BEGV
9134 && FETCH_BYTE (BYTEPOS (start_pos
) - 1) != '\n')
9137 struct glyph_row
*row
;
9139 /* Handle the case that the window start is out of range. */
9140 if (CHARPOS (start_pos
) < BEGV
)
9141 SET_TEXT_POS (start_pos
, BEGV
, BEGV_BYTE
);
9142 else if (CHARPOS (start_pos
) > ZV
)
9143 SET_TEXT_POS (start_pos
, ZV
, ZV_BYTE
);
9145 /* Find the start of the continued line. This should be fast
9146 because scan_buffer is fast (newline cache). */
9147 row
= w
->desired_matrix
->rows
+ (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0);
9148 init_iterator (&it
, w
, CHARPOS (start_pos
), BYTEPOS (start_pos
),
9149 row
, DEFAULT_FACE_ID
);
9150 reseat_at_previous_visible_line_start (&it
);
9152 /* If the line start is "too far" away from the window start,
9153 say it takes too much time to compute a new window start. */
9154 if (CHARPOS (start_pos
) - IT_CHARPOS (it
)
9155 < XFASTINT (w
->height
) * XFASTINT (w
->width
))
9157 int min_distance
, distance
;
9159 /* Move forward by display lines to find the new window
9160 start. If window width was enlarged, the new start can
9161 be expected to be > the old start. If window width was
9162 decreased, the new window start will be < the old start.
9163 So, we're looking for the display line start with the
9164 minimum distance from the old window start. */
9165 pos
= it
.current
.pos
;
9166 min_distance
= INFINITY
;
9167 while ((distance
= abs (CHARPOS (start_pos
) - IT_CHARPOS (it
))),
9168 distance
< min_distance
)
9170 min_distance
= distance
;
9171 pos
= it
.current
.pos
;
9172 move_it_by_lines (&it
, 1, 0);
9175 /* Set the window start there. */
9176 SET_MARKER_FROM_TEXT_POS (w
->start
, pos
);
9177 window_start_changed_p
= 1;
9181 return window_start_changed_p
;
9185 /* Try cursor movement in case text has not changes in window WINDOW,
9186 with window start STARTP. Value is
9190 0 if this method cannot be used
9192 -1 if we know we have to scroll the display. *SCROLL_STEP is
9193 set to 1, under certain circumstances, if we want to scroll as
9194 if scroll-step were set to 1. See the code. */
9197 try_cursor_movement (window
, startp
, scroll_step
)
9199 struct text_pos startp
;
9202 struct window
*w
= XWINDOW (window
);
9203 struct frame
*f
= XFRAME (w
->frame
);
9206 /* Handle case where text has not changed, only point, and it has
9207 not moved off the frame. */
9208 if (/* Point may be in this window. */
9209 PT
>= CHARPOS (startp
)
9210 /* Selective display hasn't changed. */
9211 && !current_buffer
->clip_changed
9212 /* Function force-mode-line-update is used to force a thorough
9213 redisplay. It sets either windows_or_buffers_changed or
9214 update_mode_lines. So don't take a shortcut here for these
9216 && !update_mode_lines
9217 && !windows_or_buffers_changed
9218 /* Can't use this case if highlighting a region. When a
9219 region exists, cursor movement has to do more than just
9221 && !(!NILP (Vtransient_mark_mode
)
9222 && !NILP (current_buffer
->mark_active
))
9223 && NILP (w
->region_showing
)
9224 && NILP (Vshow_trailing_whitespace
)
9225 /* Right after splitting windows, last_point may be nil. */
9226 && INTEGERP (w
->last_point
)
9227 /* This code is not used for mini-buffer for the sake of the case
9228 of redisplaying to replace an echo area message; since in
9229 that case the mini-buffer contents per se are usually
9230 unchanged. This code is of no real use in the mini-buffer
9231 since the handling of this_line_start_pos, etc., in redisplay
9232 handles the same cases. */
9233 && !EQ (window
, minibuf_window
)
9234 /* When splitting windows or for new windows, it happens that
9235 redisplay is called with a nil window_end_vpos or one being
9236 larger than the window. This should really be fixed in
9237 window.c. I don't have this on my list, now, so we do
9238 approximately the same as the old redisplay code. --gerd. */
9239 && INTEGERP (w
->window_end_vpos
)
9240 && XFASTINT (w
->window_end_vpos
) < w
->current_matrix
->nrows
9241 && (FRAME_WINDOW_P (f
)
9242 || !MARKERP (Voverlay_arrow_position
)
9243 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
9245 int this_scroll_margin
;
9246 struct glyph_row
*row
;
9249 debug_method_add (w
, "cursor movement");
9252 /* Scroll if point within this distance from the top or bottom
9253 of the window. This is a pixel value. */
9254 this_scroll_margin
= max (0, scroll_margin
);
9255 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
9256 this_scroll_margin
*= CANON_Y_UNIT (f
);
9258 /* Start with the row the cursor was displayed during the last
9259 not paused redisplay. Give up if that row is not valid. */
9260 if (w
->last_cursor
.vpos
< 0
9261 || w
->last_cursor
.vpos
>= w
->current_matrix
->nrows
)
9265 row
= MATRIX_ROW (w
->current_matrix
, w
->last_cursor
.vpos
);
9266 if (row
->mode_line_p
)
9268 if (!row
->enabled_p
)
9275 int last_y
= window_text_bottom_y (w
) - this_scroll_margin
;
9277 if (PT
> XFASTINT (w
->last_point
))
9279 /* Point has moved forward. */
9280 while (MATRIX_ROW_END_CHARPOS (row
) < PT
9281 && MATRIX_ROW_BOTTOM_Y (row
) < last_y
)
9283 xassert (row
->enabled_p
);
9287 /* The end position of a row equals the start position
9288 of the next row. If PT is there, we would rather
9289 display it in the next line. */
9290 while (MATRIX_ROW_BOTTOM_Y (row
) < last_y
9291 && MATRIX_ROW_END_CHARPOS (row
) == PT
9292 && !cursor_row_p (w
, row
))
9295 /* If within the scroll margin, scroll. Note that
9296 MATRIX_ROW_BOTTOM_Y gives the pixel position at which
9297 the next line would be drawn, and that
9298 this_scroll_margin can be zero. */
9299 if (MATRIX_ROW_BOTTOM_Y (row
) > last_y
9300 || PT
> MATRIX_ROW_END_CHARPOS (row
)
9301 /* Line is completely visible last line in window
9302 and PT is to be set in the next line. */
9303 || (MATRIX_ROW_BOTTOM_Y (row
) == last_y
9304 && PT
== MATRIX_ROW_END_CHARPOS (row
)
9305 && !row
->ends_at_zv_p
9306 && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)))
9309 else if (PT
< XFASTINT (w
->last_point
))
9311 /* Cursor has to be moved backward. Note that PT >=
9312 CHARPOS (startp) because of the outer
9314 while (!row
->mode_line_p
9315 && (MATRIX_ROW_START_CHARPOS (row
) > PT
9316 || (MATRIX_ROW_START_CHARPOS (row
) == PT
9317 && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row
)))
9318 && (row
->y
> this_scroll_margin
9319 || CHARPOS (startp
) == BEGV
))
9321 xassert (row
->enabled_p
);
9325 /* Consider the following case: Window starts at BEGV,
9326 there is invisible, intangible text at BEGV, so that
9327 display starts at some point START > BEGV. It can
9328 happen that we are called with PT somewhere between
9329 BEGV and START. Try to handle that case. */
9330 if (row
< w
->current_matrix
->rows
9331 || row
->mode_line_p
)
9333 row
= w
->current_matrix
->rows
;
9334 if (row
->mode_line_p
)
9338 /* Due to newlines in overlay strings, we may have to
9339 skip forward over overlay strings. */
9340 while (MATRIX_ROW_BOTTOM_Y (row
) < last_y
9341 && MATRIX_ROW_END_CHARPOS (row
) == PT
9342 && !cursor_row_p (w
, row
))
9345 /* If within the scroll margin, scroll. */
9346 if (row
->y
< this_scroll_margin
9347 && CHARPOS (startp
) != BEGV
)
9351 if (PT
< MATRIX_ROW_START_CHARPOS (row
)
9352 || PT
> MATRIX_ROW_END_CHARPOS (row
))
9354 /* if PT is not in the glyph row, give up. */
9357 else if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row
))
9359 if (PT
== MATRIX_ROW_END_CHARPOS (row
)
9360 && !row
->ends_at_zv_p
9361 && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
))
9363 else if (row
->height
> window_box_height (w
))
9365 /* If we end up in a partially visible line, let's
9366 make it fully visible, except when it's taller
9367 than the window, in which case we can't do much
9374 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
9375 try_window (window
, startp
);
9376 make_cursor_line_fully_visible (w
);
9384 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
9394 /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only
9395 selected_window is redisplayed. */
9398 redisplay_window (window
, just_this_one_p
)
9400 int just_this_one_p
;
9402 struct window
*w
= XWINDOW (window
);
9403 struct frame
*f
= XFRAME (w
->frame
);
9404 struct buffer
*buffer
= XBUFFER (w
->buffer
);
9405 struct buffer
*old
= current_buffer
;
9406 struct text_pos lpoint
, opoint
, startp
;
9407 int update_mode_line
;
9410 /* Record it now because it's overwritten. */
9411 int current_matrix_up_to_date_p
= 0;
9412 int temp_scroll_step
= 0;
9413 int count
= BINDING_STACK_SIZE ();
9416 SET_TEXT_POS (lpoint
, PT
, PT_BYTE
);
9419 /* W must be a leaf window here. */
9420 xassert (!NILP (w
->buffer
));
9422 *w
->desired_matrix
->method
= 0;
9425 specbind (Qinhibit_point_motion_hooks
, Qt
);
9427 reconsider_clip_changes (w
, buffer
);
9429 /* Has the mode line to be updated? */
9430 update_mode_line
= (!NILP (w
->update_mode_line
)
9431 || update_mode_lines
9432 || buffer
->clip_changed
);
9434 if (MINI_WINDOW_P (w
))
9436 if (w
== XWINDOW (echo_area_window
)
9437 && !NILP (echo_area_buffer
[0]))
9439 if (update_mode_line
)
9440 /* We may have to update a tty frame's menu bar or a
9441 tool-bar. Example `M-x C-h C-h C-g'. */
9442 goto finish_menu_bars
;
9444 /* We've already displayed the echo area glyphs in this window. */
9445 goto finish_scroll_bars
;
9447 else if (w
!= XWINDOW (minibuf_window
))
9449 /* W is a mini-buffer window, but it's not the currently
9450 active one, so clear it. */
9451 int yb
= window_text_bottom_y (w
);
9452 struct glyph_row
*row
;
9455 for (y
= 0, row
= w
->desired_matrix
->rows
;
9457 y
+= row
->height
, ++row
)
9458 blank_row (w
, row
, y
);
9459 goto finish_scroll_bars
;
9463 /* Otherwise set up data on this window; select its buffer and point
9465 /* Really select the buffer, for the sake of buffer-local
9467 set_buffer_internal_1 (XBUFFER (w
->buffer
));
9468 SET_TEXT_POS (opoint
, PT
, PT_BYTE
);
9470 current_matrix_up_to_date_p
9471 = (!NILP (w
->window_end_valid
)
9472 && !current_buffer
->clip_changed
9473 && XFASTINT (w
->last_modified
) >= MODIFF
9474 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
);
9476 /* When windows_or_buffers_changed is non-zero, we can't rely on
9477 the window end being valid, so set it to nil there. */
9478 if (windows_or_buffers_changed
)
9480 /* If window starts on a continuation line, maybe adjust the
9481 window start in case the window's width changed. */
9482 if (XMARKER (w
->start
)->buffer
== current_buffer
)
9483 compute_window_start_on_continuation_line (w
);
9485 w
->window_end_valid
= Qnil
;
9488 /* Some sanity checks. */
9489 CHECK_WINDOW_END (w
);
9490 if (Z
== Z_BYTE
&& CHARPOS (opoint
) != BYTEPOS (opoint
))
9492 if (BYTEPOS (opoint
) < CHARPOS (opoint
))
9495 /* If %c is in mode line, update it if needed. */
9496 if (!NILP (w
->column_number_displayed
)
9497 /* This alternative quickly identifies a common case
9498 where no change is needed. */
9499 && !(PT
== XFASTINT (w
->last_point
)
9500 && XFASTINT (w
->last_modified
) >= MODIFF
9501 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
9502 && XFASTINT (w
->column_number_displayed
) != current_column ())
9503 update_mode_line
= 1;
9505 /* Count number of windows showing the selected buffer. An indirect
9506 buffer counts as its base buffer. */
9507 if (!just_this_one_p
)
9509 struct buffer
*current_base
, *window_base
;
9510 current_base
= current_buffer
;
9511 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
9512 if (current_base
->base_buffer
)
9513 current_base
= current_base
->base_buffer
;
9514 if (window_base
->base_buffer
)
9515 window_base
= window_base
->base_buffer
;
9516 if (current_base
== window_base
)
9520 /* Point refers normally to the selected window. For any other
9521 window, set up appropriate value. */
9522 if (!EQ (window
, selected_window
))
9524 int new_pt
= XMARKER (w
->pointm
)->charpos
;
9525 int new_pt_byte
= marker_byte_position (w
->pointm
);
9529 new_pt_byte
= BEGV_BYTE
;
9530 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
9532 else if (new_pt
> (ZV
- 1))
9535 new_pt_byte
= ZV_BYTE
;
9536 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
9539 /* We don't use SET_PT so that the point-motion hooks don't run. */
9540 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
9543 /* If any of the character widths specified in the display table
9544 have changed, invalidate the width run cache. It's true that
9545 this may be a bit late to catch such changes, but the rest of
9546 redisplay goes (non-fatally) haywire when the display table is
9547 changed, so why should we worry about doing any better? */
9548 if (current_buffer
->width_run_cache
)
9550 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
9552 if (! disptab_matches_widthtab (disptab
,
9553 XVECTOR (current_buffer
->width_table
)))
9555 invalidate_region_cache (current_buffer
,
9556 current_buffer
->width_run_cache
,
9558 recompute_width_table (current_buffer
, disptab
);
9562 /* If window-start is screwed up, choose a new one. */
9563 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
9566 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
9568 /* If someone specified a new starting point but did not insist,
9569 check whether it can be used. */
9570 if (!NILP (w
->optional_new_start
)
9571 && CHARPOS (startp
) >= BEGV
9572 && CHARPOS (startp
) <= ZV
)
9574 w
->optional_new_start
= Qnil
;
9575 start_display (&it
, w
, startp
);
9576 move_it_to (&it
, PT
, 0, it
.last_visible_y
, -1,
9577 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
9578 if (IT_CHARPOS (it
) == PT
)
9579 w
->force_start
= Qt
;
9582 /* Handle case where place to start displaying has been specified,
9583 unless the specified location is outside the accessible range. */
9584 if (!NILP (w
->force_start
)
9585 || w
->frozen_window_start_p
)
9587 w
->force_start
= Qnil
;
9589 w
->window_end_valid
= Qnil
;
9591 /* Forget any recorded base line for line number display. */
9592 if (!current_matrix_up_to_date_p
9593 || current_buffer
->clip_changed
)
9594 w
->base_line_number
= Qnil
;
9596 /* Redisplay the mode line. Select the buffer properly for that.
9597 Also, run the hook window-scroll-functions
9598 because we have scrolled. */
9599 /* Note, we do this after clearing force_start because
9600 if there's an error, it is better to forget about force_start
9601 than to get into an infinite loop calling the hook functions
9602 and having them get more errors. */
9603 if (!update_mode_line
9604 || ! NILP (Vwindow_scroll_functions
))
9606 update_mode_line
= 1;
9607 w
->update_mode_line
= Qt
;
9608 startp
= run_window_scroll_functions (window
, startp
);
9611 XSETFASTINT (w
->last_modified
, 0);
9612 XSETFASTINT (w
->last_overlay_modified
, 0);
9613 if (CHARPOS (startp
) < BEGV
)
9614 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
9615 else if (CHARPOS (startp
) > ZV
)
9616 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
9618 /* Redisplay, then check if cursor has been set during the
9619 redisplay. Give up if new fonts were loaded. */
9620 if (!try_window (window
, startp
))
9622 w
->force_start
= Qt
;
9623 clear_glyph_matrix (w
->desired_matrix
);
9624 goto finish_scroll_bars
;
9627 if (w
->cursor
.vpos
< 0 && !w
->frozen_window_start_p
)
9629 /* If point does not appear, try to move point so it does
9630 appear. The desired matrix has been built above, so we
9633 struct glyph_row
*row
;
9635 window_height
= window_box_height (w
) / 2;
9636 row
= MATRIX_FIRST_TEXT_ROW (w
->desired_matrix
);
9637 while (MATRIX_ROW_BOTTOM_Y (row
) < window_height
)
9640 TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row
),
9641 MATRIX_ROW_START_BYTEPOS (row
));
9643 if (w
!= XWINDOW (selected_window
))
9644 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
9645 else if (current_buffer
== old
)
9646 SET_TEXT_POS (lpoint
, PT
, PT_BYTE
);
9648 set_cursor_from_row (w
, row
, w
->desired_matrix
, 0, 0, 0, 0);
9650 /* If we are highlighting the region, then we just changed
9651 the region, so redisplay to show it. */
9652 if (!NILP (Vtransient_mark_mode
)
9653 && !NILP (current_buffer
->mark_active
))
9655 clear_glyph_matrix (w
->desired_matrix
);
9656 if (!try_window (window
, startp
))
9657 goto finish_scroll_bars
;
9661 make_cursor_line_fully_visible (w
);
9663 debug_method_add (w
, "forced window start");
9668 /* Handle case where text has not changed, only point, and it has
9669 not moved off the frame. */
9670 if (current_matrix_up_to_date_p
9671 && (rc
= try_cursor_movement (window
, startp
, &temp_scroll_step
),
9679 /* If current starting point was originally the beginning of a line
9680 but no longer is, find a new starting point. */
9681 else if (!NILP (w
->start_at_line_beg
)
9682 && !(CHARPOS (startp
) <= BEGV
9683 || FETCH_BYTE (BYTEPOS (startp
) - 1) == '\n'))
9686 debug_method_add (w
, "recenter 1");
9691 /* Try scrolling with try_window_id. */
9692 else if (/* Windows and buffers haven't changed. */
9693 !windows_or_buffers_changed
9694 /* Window must be either use window-based redisplay or
9696 && (FRAME_WINDOW_P (f
)
9697 || (line_ins_del_ok
&& WINDOW_FULL_WIDTH_P (w
)))
9698 && !MINI_WINDOW_P (w
)
9699 /* Point is not known NOT to appear in window. */
9700 && PT
>= CHARPOS (startp
)
9701 && XFASTINT (w
->last_modified
)
9702 /* Window is not hscrolled. */
9703 && XFASTINT (w
->hscroll
) == 0
9704 /* Selective display has not changed. */
9705 && !current_buffer
->clip_changed
9706 /* Current matrix is up to date. */
9707 && !NILP (w
->window_end_valid
)
9708 /* Can't use this case if highlighting a region because
9709 a cursor movement will do more than just set the cursor. */
9710 && !(!NILP (Vtransient_mark_mode
)
9711 && !NILP (current_buffer
->mark_active
))
9712 && NILP (w
->region_showing
)
9713 && NILP (Vshow_trailing_whitespace
)
9714 /* Overlay arrow position and string not changed. */
9715 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
9716 && EQ (last_arrow_string
, Voverlay_arrow_string
)
9717 /* Value is > 0 if update has been done, it is -1 if we
9718 know that the same window start will not work. It is 0
9719 if unsuccessful for some other reason. */
9720 && (tem
= try_window_id (w
)) != 0)
9723 debug_method_add (w
, "try_window_id %d", tem
);
9726 if (fonts_changed_p
)
9727 goto finish_scroll_bars
;
9731 /* Otherwise try_window_id has returned -1 which means that we
9732 don't want the alternative below this comment to execute. */
9734 else if (CHARPOS (startp
) >= BEGV
9735 && CHARPOS (startp
) <= ZV
9736 && PT
>= CHARPOS (startp
)
9737 && (CHARPOS (startp
) < ZV
9738 /* Avoid starting at end of buffer. */
9739 || CHARPOS (startp
) == BEGV
9740 || (XFASTINT (w
->last_modified
) >= MODIFF
9741 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
9744 debug_method_add (w
, "same window start");
9747 /* Try to redisplay starting at same place as before.
9748 If point has not moved off frame, accept the results. */
9749 if (!current_matrix_up_to_date_p
9750 /* Don't use try_window_reusing_current_matrix in this case
9751 because a window scroll function can have changed the
9753 || !NILP (Vwindow_scroll_functions
)
9754 || MINI_WINDOW_P (w
)
9755 || !try_window_reusing_current_matrix (w
))
9757 IF_DEBUG (debug_method_add (w
, "1"));
9758 try_window (window
, startp
);
9761 if (fonts_changed_p
)
9762 goto finish_scroll_bars
;
9764 if (w
->cursor
.vpos
>= 0)
9766 if (!just_this_one_p
9767 || current_buffer
->clip_changed
9768 || BEG_UNCHANGED
< CHARPOS (startp
))
9769 /* Forget any recorded base line for line number display. */
9770 w
->base_line_number
= Qnil
;
9772 make_cursor_line_fully_visible (w
);
9776 clear_glyph_matrix (w
->desired_matrix
);
9781 XSETFASTINT (w
->last_modified
, 0);
9782 XSETFASTINT (w
->last_overlay_modified
, 0);
9784 /* Redisplay the mode line. Select the buffer properly for that. */
9785 if (!update_mode_line
)
9787 update_mode_line
= 1;
9788 w
->update_mode_line
= Qt
;
9791 /* Try to scroll by specified few lines. */
9792 if ((scroll_conservatively
9795 || NUMBERP (current_buffer
->scroll_up_aggressively
)
9796 || NUMBERP (current_buffer
->scroll_down_aggressively
))
9797 && !current_buffer
->clip_changed
9798 && CHARPOS (startp
) >= BEGV
9799 && CHARPOS (startp
) <= ZV
)
9801 /* The function returns -1 if new fonts were loaded, 1 if
9802 successful, 0 if not successful. */
9803 int rc
= try_scrolling (window
, just_this_one_p
,
9804 scroll_conservatively
,
9810 goto finish_scroll_bars
;
9813 /* Finally, just choose place to start which centers point */
9818 debug_method_add (w
, "recenter");
9821 /* w->vscroll = 0; */
9823 /* Forget any previously recorded base line for line number display. */
9824 if (!current_matrix_up_to_date_p
9825 || current_buffer
->clip_changed
)
9826 w
->base_line_number
= Qnil
;
9828 /* Move backward half the height of the window. */
9829 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
9830 it
.current_y
= it
.last_visible_y
;
9831 move_it_vertically_backward (&it
, it
.last_visible_y
/ 2);
9832 xassert (IT_CHARPOS (it
) >= BEGV
);
9834 /* The function move_it_vertically_backward may move over more
9835 than the specified y-distance. If it->w is small, e.g. a
9836 mini-buffer window, we may end up in front of the window's
9837 display area. Start displaying at the start of the line
9838 containing PT in this case. */
9839 if (it
.current_y
<= 0)
9841 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
9842 move_it_vertically (&it
, 0);
9843 xassert (IT_CHARPOS (it
) <= PT
);
9847 it
.current_x
= it
.hpos
= 0;
9849 /* Set startp here explicitly in case that helps avoid an infinite loop
9850 in case the window-scroll-functions functions get errors. */
9851 set_marker_both (w
->start
, Qnil
, IT_CHARPOS (it
), IT_BYTEPOS (it
));
9853 /* Run scroll hooks. */
9854 startp
= run_window_scroll_functions (window
, it
.current
.pos
);
9856 /* Redisplay the window. */
9857 if (!current_matrix_up_to_date_p
9858 || windows_or_buffers_changed
9859 /* Don't use try_window_reusing_current_matrix in this case
9860 because it can have changed the buffer. */
9861 || !NILP (Vwindow_scroll_functions
)
9863 || MINI_WINDOW_P (w
)
9864 || !try_window_reusing_current_matrix (w
))
9865 try_window (window
, startp
);
9867 /* If new fonts have been loaded (due to fontsets), give up. We
9868 have to start a new redisplay since we need to re-adjust glyph
9870 if (fonts_changed_p
)
9871 goto finish_scroll_bars
;
9873 /* If cursor did not appear assume that the middle of the window is
9874 in the first line of the window. Do it again with the next line.
9875 (Imagine a window of height 100, displaying two lines of height
9876 60. Moving back 50 from it->last_visible_y will end in the first
9878 if (w
->cursor
.vpos
< 0)
9880 if (!NILP (w
->window_end_valid
)
9881 && PT
>= Z
- XFASTINT (w
->window_end_pos
))
9883 clear_glyph_matrix (w
->desired_matrix
);
9884 move_it_by_lines (&it
, 1, 0);
9885 try_window (window
, it
.current
.pos
);
9887 else if (PT
< IT_CHARPOS (it
))
9889 clear_glyph_matrix (w
->desired_matrix
);
9890 move_it_by_lines (&it
, -1, 0);
9891 try_window (window
, it
.current
.pos
);
9895 /* Not much we can do about it. */
9899 /* Consider the following case: Window starts at BEGV, there is
9900 invisible, intangible text at BEGV, so that display starts at
9901 some point START > BEGV. It can happen that we are called with
9902 PT somewhere between BEGV and START. Try to handle that case. */
9903 if (w
->cursor
.vpos
< 0)
9905 struct glyph_row
*row
= w
->current_matrix
->rows
;
9906 if (row
->mode_line_p
)
9908 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
9911 make_cursor_line_fully_visible (w
);
9915 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
9916 w
->start_at_line_beg
= ((CHARPOS (startp
) == BEGV
9917 || FETCH_BYTE (BYTEPOS (startp
) - 1) == '\n')
9920 /* Display the mode line, if we must. */
9921 if ((update_mode_line
9922 /* If window not full width, must redo its mode line
9923 if (a) the window to its side is being redone and
9924 (b) we do a frame-based redisplay. This is a consequence
9925 of how inverted lines are drawn in frame-based redisplay. */
9926 || (!just_this_one_p
9927 && !FRAME_WINDOW_P (f
)
9928 && !WINDOW_FULL_WIDTH_P (w
))
9929 /* Line number to display. */
9930 || INTEGERP (w
->base_line_pos
)
9931 /* Column number is displayed and different from the one displayed. */
9932 || (!NILP (w
->column_number_displayed
)
9933 && XFASTINT (w
->column_number_displayed
) != current_column ()))
9934 /* This means that the window has a mode line. */
9935 && (WINDOW_WANTS_MODELINE_P (w
)
9936 || WINDOW_WANTS_HEADER_LINE_P (w
)))
9938 Lisp_Object old_selected_frame
;
9940 old_selected_frame
= selected_frame
;
9942 XSETFRAME (selected_frame
, f
);
9943 display_mode_lines (w
);
9944 selected_frame
= old_selected_frame
;
9946 /* If mode line height has changed, arrange for a thorough
9947 immediate redisplay using the correct mode line height. */
9948 if (WINDOW_WANTS_MODELINE_P (w
)
9949 && CURRENT_MODE_LINE_HEIGHT (w
) != DESIRED_MODE_LINE_HEIGHT (w
))
9951 fonts_changed_p
= 1;
9952 MATRIX_MODE_LINE_ROW (w
->current_matrix
)->height
9953 = DESIRED_MODE_LINE_HEIGHT (w
);
9956 /* If top line height has changed, arrange for a thorough
9957 immediate redisplay using the correct mode line height. */
9958 if (WINDOW_WANTS_HEADER_LINE_P (w
)
9959 && CURRENT_HEADER_LINE_HEIGHT (w
) != DESIRED_HEADER_LINE_HEIGHT (w
))
9961 fonts_changed_p
= 1;
9962 MATRIX_HEADER_LINE_ROW (w
->current_matrix
)->height
9963 = DESIRED_HEADER_LINE_HEIGHT (w
);
9966 if (fonts_changed_p
)
9967 goto finish_scroll_bars
;
9970 if (!line_number_displayed
9971 && !BUFFERP (w
->base_line_pos
))
9973 w
->base_line_pos
= Qnil
;
9974 w
->base_line_number
= Qnil
;
9979 /* When we reach a frame's selected window, redo the frame's menu bar. */
9980 if (update_mode_line
9981 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
9983 int redisplay_menu_p
= 0;
9985 if (FRAME_WINDOW_P (f
))
9987 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI) || defined (macintosh)
9988 redisplay_menu_p
= FRAME_EXTERNAL_MENU_BAR (f
);
9990 redisplay_menu_p
= FRAME_MENU_BAR_LINES (f
) > 0;
9994 redisplay_menu_p
= FRAME_MENU_BAR_LINES (f
) > 0;
9996 if (redisplay_menu_p
)
9997 display_menu_bar (w
);
9999 #ifdef HAVE_WINDOW_SYSTEM
10000 if (WINDOWP (f
->tool_bar_window
)
10001 && (FRAME_TOOL_BAR_LINES (f
) > 0
10002 || auto_resize_tool_bars_p
))
10003 redisplay_tool_bar (f
);
10007 finish_scroll_bars
:
10009 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
10011 int start
, end
, whole
;
10013 /* Calculate the start and end positions for the current window.
10014 At some point, it would be nice to choose between scrollbars
10015 which reflect the whole buffer size, with special markers
10016 indicating narrowing, and scrollbars which reflect only the
10019 Note that mini-buffers sometimes aren't displaying any text. */
10020 if (!MINI_WINDOW_P (w
)
10021 || (w
== XWINDOW (minibuf_window
)
10022 && NILP (echo_area_buffer
[0])))
10025 start
= marker_position (w
->start
) - BEGV
;
10026 /* I don't think this is guaranteed to be right. For the
10027 moment, we'll pretend it is. */
10028 end
= (Z
- XFASTINT (w
->window_end_pos
)) - BEGV
;
10032 if (whole
< (end
- start
))
10033 whole
= end
- start
;
10036 start
= end
= whole
= 0;
10038 /* Indicate what this scroll bar ought to be displaying now. */
10039 set_vertical_scroll_bar_hook (w
, end
- start
, whole
, start
);
10041 /* Note that we actually used the scroll bar attached to this
10042 window, so it shouldn't be deleted at the end of redisplay. */
10043 redeem_scroll_bar_hook (w
);
10046 /* Restore current_buffer and value of point in it. */
10047 TEMP_SET_PT_BOTH (CHARPOS (opoint
), BYTEPOS (opoint
));
10048 set_buffer_internal_1 (old
);
10049 TEMP_SET_PT_BOTH (CHARPOS (lpoint
), BYTEPOS (lpoint
));
10051 unbind_to (count
, Qnil
);
10055 /* Build the complete desired matrix of WINDOW with a window start
10056 buffer position POS. Value is non-zero if successful. It is zero
10057 if fonts were loaded during redisplay which makes re-adjusting
10058 glyph matrices necessary. */
10061 try_window (window
, pos
)
10062 Lisp_Object window
;
10063 struct text_pos pos
;
10065 struct window
*w
= XWINDOW (window
);
10067 struct glyph_row
*last_text_row
= NULL
;
10069 /* Make POS the new window start. */
10070 set_marker_both (w
->start
, Qnil
, CHARPOS (pos
), BYTEPOS (pos
));
10072 /* Mark cursor position as unknown. No overlay arrow seen. */
10073 w
->cursor
.vpos
= -1;
10074 overlay_arrow_seen
= 0;
10076 /* Initialize iterator and info to start at POS. */
10077 start_display (&it
, w
, pos
);
10079 /* Display all lines of W. */
10080 while (it
.current_y
< it
.last_visible_y
)
10082 if (display_line (&it
))
10083 last_text_row
= it
.glyph_row
- 1;
10084 if (fonts_changed_p
)
10088 /* If bottom moved off end of frame, change mode line percentage. */
10089 if (XFASTINT (w
->window_end_pos
) <= 0
10090 && Z
!= IT_CHARPOS (it
))
10091 w
->update_mode_line
= Qt
;
10093 /* Set window_end_pos to the offset of the last character displayed
10094 on the window from the end of current_buffer. Set
10095 window_end_vpos to its row number. */
10098 xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row
));
10099 w
->window_end_bytepos
10100 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
10101 XSETFASTINT (w
->window_end_pos
,
10102 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
10103 XSETFASTINT (w
->window_end_vpos
,
10104 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
10105 xassert (MATRIX_ROW (w
->desired_matrix
, XFASTINT (w
->window_end_vpos
))
10106 ->displays_text_p
);
10110 w
->window_end_bytepos
= 0;
10111 XSETFASTINT (w
->window_end_pos
, 0);
10112 XSETFASTINT (w
->window_end_vpos
, 0);
10115 /* But that is not valid info until redisplay finishes. */
10116 w
->window_end_valid
= Qnil
;
10122 /************************************************************************
10123 Window redisplay reusing current matrix when buffer has not changed
10124 ************************************************************************/
10126 /* Try redisplay of window W showing an unchanged buffer with a
10127 different window start than the last time it was displayed by
10128 reusing its current matrix. Value is non-zero if successful.
10129 W->start is the new window start. */
10132 try_window_reusing_current_matrix (w
)
10135 struct frame
*f
= XFRAME (w
->frame
);
10136 struct glyph_row
*row
, *bottom_row
;
10139 struct text_pos start
, new_start
;
10140 int nrows_scrolled
, i
;
10141 struct glyph_row
*last_text_row
;
10142 struct glyph_row
*last_reused_text_row
;
10143 struct glyph_row
*start_row
;
10144 int start_vpos
, min_y
, max_y
;
10146 if (/* This function doesn't handle terminal frames. */
10147 !FRAME_WINDOW_P (f
)
10148 /* Don't try to reuse the display if windows have been split
10150 || windows_or_buffers_changed
)
10153 /* Can't do this if region may have changed. */
10154 if ((!NILP (Vtransient_mark_mode
)
10155 && !NILP (current_buffer
->mark_active
))
10156 || !NILP (w
->region_showing
)
10157 || !NILP (Vshow_trailing_whitespace
))
10160 /* If top-line visibility has changed, give up. */
10161 if (WINDOW_WANTS_HEADER_LINE_P (w
)
10162 != MATRIX_HEADER_LINE_ROW (w
->current_matrix
)->mode_line_p
)
10165 /* Give up if old or new display is scrolled vertically. We could
10166 make this function handle this, but right now it doesn't. */
10167 start_row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10168 if (w
->vscroll
|| MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row
))
10171 /* The variable new_start now holds the new window start. The old
10172 start `start' can be determined from the current matrix. */
10173 SET_TEXT_POS_FROM_MARKER (new_start
, w
->start
);
10174 start
= start_row
->start
.pos
;
10175 start_vpos
= MATRIX_ROW_VPOS (start_row
, w
->current_matrix
);
10177 /* Clear the desired matrix for the display below. */
10178 clear_glyph_matrix (w
->desired_matrix
);
10180 if (CHARPOS (new_start
) <= CHARPOS (start
))
10184 IF_DEBUG (debug_method_add (w
, "twu1"));
10186 /* Display up to a row that can be reused. The variable
10187 last_text_row is set to the last row displayed that displays
10188 text. Note that it.vpos == 0 if or if not there is a
10189 header-line; it's not the same as the MATRIX_ROW_VPOS! */
10190 start_display (&it
, w
, new_start
);
10191 first_row_y
= it
.current_y
;
10192 w
->cursor
.vpos
= -1;
10193 last_text_row
= last_reused_text_row
= NULL
;
10195 while (it
.current_y
< it
.last_visible_y
10196 && IT_CHARPOS (it
) < CHARPOS (start
)
10197 && !fonts_changed_p
)
10198 if (display_line (&it
))
10199 last_text_row
= it
.glyph_row
- 1;
10201 /* A value of current_y < last_visible_y means that we stopped
10202 at the previous window start, which in turn means that we
10203 have at least one reusable row. */
10204 if (it
.current_y
< it
.last_visible_y
)
10206 /* IT.vpos always starts from 0; it counts text lines. */
10207 nrows_scrolled
= it
.vpos
;
10209 /* Find PT if not already found in the lines displayed. */
10210 if (w
->cursor
.vpos
< 0)
10212 int dy
= it
.current_y
- first_row_y
;
10214 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10215 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
10217 if (PT
>= MATRIX_ROW_START_CHARPOS (row
)
10218 && PT
< MATRIX_ROW_END_CHARPOS (row
))
10220 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0,
10221 dy
, nrows_scrolled
);
10225 if (MATRIX_ROW_BOTTOM_Y (row
) + dy
>= it
.last_visible_y
)
10231 /* Give up if point was not found. This shouldn't
10232 happen often; not more often than with try_window
10234 if (w
->cursor
.vpos
< 0)
10236 clear_glyph_matrix (w
->desired_matrix
);
10241 /* Scroll the display. Do it before the current matrix is
10242 changed. The problem here is that update has not yet
10243 run, i.e. part of the current matrix is not up to date.
10244 scroll_run_hook will clear the cursor, and use the
10245 current matrix to get the height of the row the cursor is
10247 run
.current_y
= first_row_y
;
10248 run
.desired_y
= it
.current_y
;
10249 run
.height
= it
.last_visible_y
- it
.current_y
;
10251 if (run
.height
> 0 && run
.current_y
!= run
.desired_y
)
10254 rif
->update_window_begin_hook (w
);
10255 rif
->clear_mouse_face (w
);
10256 rif
->scroll_run_hook (w
, &run
);
10257 rif
->update_window_end_hook (w
, 0, 0);
10261 /* Shift current matrix down by nrows_scrolled lines. */
10262 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
10263 rotate_matrix (w
->current_matrix
,
10265 MATRIX_ROW_VPOS (bottom_row
, w
->current_matrix
),
10268 /* Disable lines that must be updated. */
10269 for (i
= 0; i
< it
.vpos
; ++i
)
10270 (start_row
+ i
)->enabled_p
= 0;
10272 /* Re-compute Y positions. */
10273 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
10274 max_y
= it
.last_visible_y
;
10275 for (row
= start_row
+ nrows_scrolled
;
10279 row
->y
= it
.current_y
;
10281 if (row
->y
< min_y
)
10282 row
->visible_height
= row
->height
- (min_y
- row
->y
);
10283 else if (row
->y
+ row
->height
> max_y
)
10284 row
->visible_height
10285 = row
->height
- (row
->y
+ row
->height
- max_y
);
10287 row
->visible_height
= row
->height
;
10289 it
.current_y
+= row
->height
;
10291 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
10292 last_reused_text_row
= row
;
10293 if (MATRIX_ROW_BOTTOM_Y (row
) >= it
.last_visible_y
)
10297 /* Disable lines in the current matrix which are now
10298 below the window. */
10299 for (++row
; row
< bottom_row
; ++row
)
10300 row
->enabled_p
= 0;
10303 /* Update window_end_pos etc.; last_reused_text_row is the last
10304 reused row from the current matrix containing text, if any.
10305 The value of last_text_row is the last displayed line
10306 containing text. */
10307 if (last_reused_text_row
)
10309 w
->window_end_bytepos
10310 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_reused_text_row
);
10311 XSETFASTINT (w
->window_end_pos
,
10312 Z
- MATRIX_ROW_END_CHARPOS (last_reused_text_row
));
10313 XSETFASTINT (w
->window_end_vpos
,
10314 MATRIX_ROW_VPOS (last_reused_text_row
,
10315 w
->current_matrix
));
10317 else if (last_text_row
)
10319 w
->window_end_bytepos
10320 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
10321 XSETFASTINT (w
->window_end_pos
,
10322 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
10323 XSETFASTINT (w
->window_end_vpos
,
10324 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
10328 /* This window must be completely empty. */
10329 w
->window_end_bytepos
= 0;
10330 XSETFASTINT (w
->window_end_pos
, 0);
10331 XSETFASTINT (w
->window_end_vpos
, 0);
10333 w
->window_end_valid
= Qnil
;
10335 /* Update hint: don't try scrolling again in update_window. */
10336 w
->desired_matrix
->no_scrolling_p
= 1;
10339 debug_method_add (w
, "try_window_reusing_current_matrix 1");
10343 else if (CHARPOS (new_start
) > CHARPOS (start
))
10345 struct glyph_row
*pt_row
, *row
;
10346 struct glyph_row
*first_reusable_row
;
10347 struct glyph_row
*first_row_to_display
;
10349 int yb
= window_text_bottom_y (w
);
10351 IF_DEBUG (debug_method_add (w
, "twu2"));
10353 /* Find the row starting at new_start, if there is one. Don't
10354 reuse a partially visible line at the end. */
10355 first_reusable_row
= start_row
;
10356 while (first_reusable_row
->enabled_p
10357 && MATRIX_ROW_BOTTOM_Y (first_reusable_row
) < yb
10358 && (MATRIX_ROW_START_CHARPOS (first_reusable_row
)
10359 < CHARPOS (new_start
)))
10360 ++first_reusable_row
;
10362 /* Give up if there is no row to reuse. */
10363 if (MATRIX_ROW_BOTTOM_Y (first_reusable_row
) >= yb
10364 || !first_reusable_row
->enabled_p
10365 || (MATRIX_ROW_START_CHARPOS (first_reusable_row
)
10366 != CHARPOS (new_start
)))
10369 /* We can reuse fully visible rows beginning with
10370 first_reusable_row to the end of the window. Set
10371 first_row_to_display to the first row that cannot be reused.
10372 Set pt_row to the row containing point, if there is any. */
10373 first_row_to_display
= first_reusable_row
;
10375 while (MATRIX_ROW_BOTTOM_Y (first_row_to_display
) < yb
)
10377 if (PT
>= MATRIX_ROW_START_CHARPOS (first_row_to_display
)
10378 && PT
< MATRIX_ROW_END_CHARPOS (first_row_to_display
))
10379 pt_row
= first_row_to_display
;
10381 ++first_row_to_display
;
10384 /* Start displaying at the start of first_row_to_display. */
10385 xassert (first_row_to_display
->y
< yb
);
10386 init_to_row_start (&it
, w
, first_row_to_display
);
10387 nrows_scrolled
= (MATRIX_ROW_VPOS (first_reusable_row
, w
->current_matrix
)
10389 it
.vpos
= (MATRIX_ROW_VPOS (first_row_to_display
, w
->current_matrix
)
10391 it
.current_y
= (first_row_to_display
->y
- first_reusable_row
->y
10392 + WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
));
10394 /* Display lines beginning with first_row_to_display in the
10395 desired matrix. Set last_text_row to the last row displayed
10396 that displays text. */
10397 it
.glyph_row
= MATRIX_ROW (w
->desired_matrix
, it
.vpos
);
10398 if (pt_row
== NULL
)
10399 w
->cursor
.vpos
= -1;
10400 last_text_row
= NULL
;
10401 while (it
.current_y
< it
.last_visible_y
&& !fonts_changed_p
)
10402 if (display_line (&it
))
10403 last_text_row
= it
.glyph_row
- 1;
10405 /* Give up If point isn't in a row displayed or reused. */
10406 if (w
->cursor
.vpos
< 0)
10408 clear_glyph_matrix (w
->desired_matrix
);
10412 /* If point is in a reused row, adjust y and vpos of the cursor
10416 w
->cursor
.vpos
-= MATRIX_ROW_VPOS (first_reusable_row
,
10417 w
->current_matrix
);
10418 w
->cursor
.y
-= first_reusable_row
->y
;
10421 /* Scroll the display. */
10422 run
.current_y
= first_reusable_row
->y
;
10423 run
.desired_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
10424 run
.height
= it
.last_visible_y
- run
.current_y
;
10425 dy
= run
.current_y
- run
.desired_y
;
10429 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
10431 rif
->update_window_begin_hook (w
);
10432 rif
->clear_mouse_face (w
);
10433 rif
->scroll_run_hook (w
, &run
);
10434 rif
->update_window_end_hook (w
, 0, 0);
10438 /* Adjust Y positions of reused rows. */
10439 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
10440 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
10441 max_y
= it
.last_visible_y
;
10442 for (row
= first_reusable_row
; row
< first_row_to_display
; ++row
)
10445 if (row
->y
< min_y
)
10446 row
->visible_height
= row
->height
- (min_y
- row
->y
);
10447 else if (row
->y
+ row
->height
> max_y
)
10448 row
->visible_height
10449 = row
->height
- (row
->y
+ row
->height
- max_y
);
10451 row
->visible_height
= row
->height
;
10454 /* Disable rows not reused. */
10455 while (row
< bottom_row
)
10457 row
->enabled_p
= 0;
10461 /* Scroll the current matrix. */
10462 xassert (nrows_scrolled
> 0);
10463 rotate_matrix (w
->current_matrix
,
10465 MATRIX_ROW_VPOS (bottom_row
, w
->current_matrix
),
10468 /* Adjust window end. A null value of last_text_row means that
10469 the window end is in reused rows which in turn means that
10470 only its vpos can have changed. */
10473 w
->window_end_bytepos
10474 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
10475 XSETFASTINT (w
->window_end_pos
,
10476 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
10477 XSETFASTINT (w
->window_end_vpos
,
10478 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
10482 XSETFASTINT (w
->window_end_vpos
,
10483 XFASTINT (w
->window_end_vpos
) - nrows_scrolled
);
10486 w
->window_end_valid
= Qnil
;
10487 w
->desired_matrix
->no_scrolling_p
= 1;
10490 debug_method_add (w
, "try_window_reusing_current_matrix 2");
10500 /************************************************************************
10501 Window redisplay reusing current matrix when buffer has changed
10502 ************************************************************************/
10504 static struct glyph_row
*find_last_unchanged_at_beg_row
P_ ((struct window
*));
10505 static struct glyph_row
*find_first_unchanged_at_end_row
P_ ((struct window
*,
10507 static struct glyph_row
*
10508 find_last_row_displaying_text
P_ ((struct glyph_matrix
*, struct it
*,
10509 struct glyph_row
*));
10512 /* Return the last row in MATRIX displaying text. If row START is
10513 non-null, start searching with that row. IT gives the dimensions
10514 of the display. Value is null if matrix is empty; otherwise it is
10515 a pointer to the row found. */
10517 static struct glyph_row
*
10518 find_last_row_displaying_text (matrix
, it
, start
)
10519 struct glyph_matrix
*matrix
;
10521 struct glyph_row
*start
;
10523 struct glyph_row
*row
, *row_found
;
10525 /* Set row_found to the last row in IT->w's current matrix
10526 displaying text. The loop looks funny but think of partially
10529 row
= start
? start
: MATRIX_FIRST_TEXT_ROW (matrix
);
10530 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
10532 xassert (row
->enabled_p
);
10534 if (MATRIX_ROW_BOTTOM_Y (row
) >= it
->last_visible_y
)
10543 /* Return the last row in the current matrix of W that is not affected
10544 by changes at the start of current_buffer that occurred since the
10545 last time W was redisplayed. Value is null if no such row exists.
10547 The global variable beg_unchanged has to contain the number of
10548 bytes unchanged at the start of current_buffer. BEG +
10549 beg_unchanged is the buffer position of the first changed byte in
10550 current_buffer. Characters at positions < BEG + beg_unchanged are
10551 at the same buffer positions as they were when the current matrix
10554 static struct glyph_row
*
10555 find_last_unchanged_at_beg_row (w
)
10558 int first_changed_pos
= BEG
+ BEG_UNCHANGED
;
10559 struct glyph_row
*row
;
10560 struct glyph_row
*row_found
= NULL
;
10561 int yb
= window_text_bottom_y (w
);
10563 /* Find the last row displaying unchanged text. */
10564 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10565 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
10566 && MATRIX_ROW_START_CHARPOS (row
) < first_changed_pos
)
10568 if (/* If row ends before first_changed_pos, it is unchanged,
10569 except in some case. */
10570 MATRIX_ROW_END_CHARPOS (row
) <= first_changed_pos
10571 /* When row ends in ZV and we write at ZV it is not
10573 && !row
->ends_at_zv_p
10574 /* When first_changed_pos is the end of a continued line,
10575 row is not unchanged because it may be no longer
10577 && !(MATRIX_ROW_END_CHARPOS (row
) == first_changed_pos
10578 && row
->continued_p
))
10581 /* Stop if last visible row. */
10582 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
10592 /* Find the first glyph row in the current matrix of W that is not
10593 affected by changes at the end of current_buffer since the last
10594 time the window was redisplayed. Return in *DELTA the number of
10595 chars by which buffer positions in unchanged text at the end of
10596 current_buffer must be adjusted. Return in *DELTA_BYTES the
10597 corresponding number of bytes. Value is null if no such row
10598 exists, i.e. all rows are affected by changes. */
10600 static struct glyph_row
*
10601 find_first_unchanged_at_end_row (w
, delta
, delta_bytes
)
10603 int *delta
, *delta_bytes
;
10605 struct glyph_row
*row
;
10606 struct glyph_row
*row_found
= NULL
;
10608 *delta
= *delta_bytes
= 0;
10610 /* Display must not have been paused, otherwise the current matrix
10611 is not up to date. */
10612 if (NILP (w
->window_end_valid
))
10615 /* A value of window_end_pos >= END_UNCHANGED means that the window
10616 end is in the range of changed text. If so, there is no
10617 unchanged row at the end of W's current matrix. */
10618 if (XFASTINT (w
->window_end_pos
) >= END_UNCHANGED
)
10621 /* Set row to the last row in W's current matrix displaying text. */
10622 row
= MATRIX_ROW (w
->current_matrix
, XFASTINT (w
->window_end_vpos
));
10624 /* If matrix is entirely empty, no unchanged row exists. */
10625 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
10627 /* The value of row is the last glyph row in the matrix having a
10628 meaningful buffer position in it. The end position of row
10629 corresponds to window_end_pos. This allows us to translate
10630 buffer positions in the current matrix to current buffer
10631 positions for characters not in changed text. */
10632 int Z_old
= MATRIX_ROW_END_CHARPOS (row
) + XFASTINT (w
->window_end_pos
);
10633 int Z_BYTE_old
= MATRIX_ROW_END_BYTEPOS (row
) + w
->window_end_bytepos
;
10634 int last_unchanged_pos
, last_unchanged_pos_old
;
10635 struct glyph_row
*first_text_row
10636 = MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10638 *delta
= Z
- Z_old
;
10639 *delta_bytes
= Z_BYTE
- Z_BYTE_old
;
10641 /* Set last_unchanged_pos to the buffer position of the last
10642 character in the buffer that has not been changed. Z is the
10643 index + 1 of the last byte in current_buffer, i.e. by
10644 subtracting end_unchanged we get the index of the last
10645 unchanged character, and we have to add BEG to get its buffer
10647 last_unchanged_pos
= Z
- END_UNCHANGED
+ BEG
;
10648 last_unchanged_pos_old
= last_unchanged_pos
- *delta
;
10650 /* Search backward from ROW for a row displaying a line that
10651 starts at a minimum position >= last_unchanged_pos_old. */
10652 for (; row
> first_text_row
; --row
)
10654 if (!row
->enabled_p
|| !MATRIX_ROW_DISPLAYS_TEXT_P (row
))
10657 if (MATRIX_ROW_START_CHARPOS (row
) >= last_unchanged_pos_old
)
10662 if (row_found
&& !MATRIX_ROW_DISPLAYS_TEXT_P (row_found
))
10669 /* Make sure that glyph rows in the current matrix of window W
10670 reference the same glyph memory as corresponding rows in the
10671 frame's frame matrix. This function is called after scrolling W's
10672 current matrix on a terminal frame in try_window_id and
10673 try_window_reusing_current_matrix. */
10676 sync_frame_with_window_matrix_rows (w
)
10679 struct frame
*f
= XFRAME (w
->frame
);
10680 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
10682 /* Preconditions: W must be a leaf window and full-width. Its frame
10683 must have a frame matrix. */
10684 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
10685 xassert (WINDOW_FULL_WIDTH_P (w
));
10686 xassert (!FRAME_WINDOW_P (f
));
10688 /* If W is a full-width window, glyph pointers in W's current matrix
10689 have, by definition, to be the same as glyph pointers in the
10690 corresponding frame matrix. */
10691 window_row
= w
->current_matrix
->rows
;
10692 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
10693 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
10694 while (window_row
< window_row_end
)
10698 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
10699 frame_row
->glyphs
[area
] = window_row
->glyphs
[area
];
10701 /* Disable frame rows whose corresponding window rows have
10702 been disabled in try_window_id. */
10703 if (!window_row
->enabled_p
)
10704 frame_row
->enabled_p
= 0;
10706 ++window_row
, ++frame_row
;
10711 /* Find the glyph row in window W containing CHARPOS. Consider all
10712 rows between START and END (not inclusive). END null means search
10713 all rows to the end of the display area of W. Value is the row
10714 containing CHARPOS or null. */
10716 static struct glyph_row
*
10717 row_containing_pos (w
, charpos
, start
, end
)
10720 struct glyph_row
*start
, *end
;
10722 struct glyph_row
*row
= start
;
10725 /* If we happen to start on a header-line, skip that. */
10726 if (row
->mode_line_p
)
10729 if ((end
&& row
>= end
) || !row
->enabled_p
)
10732 last_y
= window_text_bottom_y (w
);
10734 while ((end
== NULL
|| row
< end
)
10735 && (MATRIX_ROW_END_CHARPOS (row
) < charpos
10736 /* The end position of a row equals the start
10737 position of the next row. If CHARPOS is there, we
10738 would rather display it in the next line, except
10739 when this line ends in ZV. */
10740 || (MATRIX_ROW_END_CHARPOS (row
) == charpos
10741 && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)
10742 || !row
->ends_at_zv_p
)))
10743 && MATRIX_ROW_BOTTOM_Y (row
) < last_y
)
10746 /* Give up if CHARPOS not found. */
10747 if ((end
&& row
>= end
)
10748 || charpos
< MATRIX_ROW_START_CHARPOS (row
)
10749 || charpos
> MATRIX_ROW_END_CHARPOS (row
))
10756 /* Try to redisplay window W by reusing its existing display. W's
10757 current matrix must be up to date when this function is called,
10758 i.e. window_end_valid must not be nil.
10762 1 if display has been updated
10763 0 if otherwise unsuccessful
10764 -1 if redisplay with same window start is known not to succeed
10766 The following steps are performed:
10768 1. Find the last row in the current matrix of W that is not
10769 affected by changes at the start of current_buffer. If no such row
10772 2. Find the first row in W's current matrix that is not affected by
10773 changes at the end of current_buffer. Maybe there is no such row.
10775 3. Display lines beginning with the row + 1 found in step 1 to the
10776 row found in step 2 or, if step 2 didn't find a row, to the end of
10779 4. If cursor is not known to appear on the window, give up.
10781 5. If display stopped at the row found in step 2, scroll the
10782 display and current matrix as needed.
10784 6. Maybe display some lines at the end of W, if we must. This can
10785 happen under various circumstances, like a partially visible line
10786 becoming fully visible, or because newly displayed lines are displayed
10787 in smaller font sizes.
10789 7. Update W's window end information. */
10791 /* Check that window end is what we expect it to be. */
10797 struct frame
*f
= XFRAME (w
->frame
);
10798 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
10799 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
10800 struct glyph_row
*last_unchanged_at_beg_row
;
10801 struct glyph_row
*first_unchanged_at_end_row
;
10802 struct glyph_row
*row
;
10803 struct glyph_row
*bottom_row
;
10806 int delta
= 0, delta_bytes
= 0, stop_pos
, dvpos
, dy
;
10807 struct text_pos start_pos
;
10809 int first_unchanged_at_end_vpos
= 0;
10810 struct glyph_row
*last_text_row
, *last_text_row_at_end
;
10811 struct text_pos start
;
10813 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
10815 /* Check pre-conditions. Window end must be valid, otherwise
10816 the current matrix would not be up to date. */
10817 xassert (!NILP (w
->window_end_valid
));
10818 xassert (FRAME_WINDOW_P (XFRAME (w
->frame
))
10819 || (line_ins_del_ok
&& WINDOW_FULL_WIDTH_P (w
)));
10821 /* Make sure beg_unchanged and end_unchanged are up to date. Do it
10822 only if buffer has really changed. The reason is that the gap is
10823 initially at Z for freshly visited files. The code below would
10824 set end_unchanged to 0 in that case. */
10825 if (MODIFF
> SAVE_MODIFF
10826 /* This seems to happen sometimes after saving a buffer. */
10827 || BEG_UNCHANGED
+ END_UNCHANGED
> Z_BYTE
)
10829 if (GPT
- BEG
< BEG_UNCHANGED
)
10830 BEG_UNCHANGED
= GPT
- BEG
;
10831 if (Z
- GPT
< END_UNCHANGED
)
10832 END_UNCHANGED
= Z
- GPT
;
10835 /* If window starts after a line end, and the last change is in
10836 front of that newline, then changes don't affect the display.
10837 This case happens with stealth-fontification. Note that although
10838 the display is unchanged, glyph positions in the matrix have to
10839 be adjusted, of course. */
10840 row
= MATRIX_ROW (w
->current_matrix
, XFASTINT (w
->window_end_vpos
));
10841 if (CHARPOS (start
) > BEGV
10842 && Z
- END_UNCHANGED
< CHARPOS (start
) - 1
10843 && FETCH_BYTE (BYTEPOS (start
) - 1) == '\n'
10844 && PT
< MATRIX_ROW_END_CHARPOS (row
))
10846 struct glyph_row
*r0
= MATRIX_FIRST_TEXT_ROW (current_matrix
);
10847 int delta
= CHARPOS (start
) - MATRIX_ROW_START_CHARPOS (r0
);
10851 struct glyph_row
*r1
= MATRIX_BOTTOM_TEXT_ROW (current_matrix
, w
);
10852 int delta_bytes
= BYTEPOS (start
) - MATRIX_ROW_START_BYTEPOS (r0
);
10854 increment_matrix_positions (w
->current_matrix
,
10855 MATRIX_ROW_VPOS (r0
, current_matrix
),
10856 MATRIX_ROW_VPOS (r1
, current_matrix
),
10857 delta
, delta_bytes
);
10860 #if 0 /* If changes are all in front of the window start, the
10861 distance of the last displayed glyph from Z hasn't
10864 = make_number (Z
- MATRIX_ROW_END_CHARPOS (row
));
10865 w
->window_end_bytepos
10866 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
);
10869 row
= row_containing_pos (w
, PT
, r0
, NULL
);
10873 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
10877 /* Return quickly if changes are all below what is displayed in the
10878 window, and if PT is in the window. */
10879 if (BEG_UNCHANGED
> MATRIX_ROW_END_CHARPOS (row
)
10880 && PT
< MATRIX_ROW_END_CHARPOS (row
))
10882 /* We have to update window end positions because the buffer's
10883 size has changed. */
10885 = make_number (Z
- MATRIX_ROW_END_CHARPOS (row
));
10886 w
->window_end_bytepos
10887 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
);
10889 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10890 row
= row_containing_pos (w
, PT
, row
, NULL
);
10891 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
10895 /* Check that window start agrees with the start of the first glyph
10896 row in its current matrix. Check this after we know the window
10897 start is not in changed text, otherwise positions would not be
10899 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
10900 if (!TEXT_POS_EQUAL_P (start
, row
->start
.pos
))
10903 /* Compute the position at which we have to start displaying new
10904 lines. Some of the lines at the top of the window might be
10905 reusable because they are not displaying changed text. Find the
10906 last row in W's current matrix not affected by changes at the
10907 start of current_buffer. Value is null if changes start in the
10908 first line of window. */
10909 last_unchanged_at_beg_row
= find_last_unchanged_at_beg_row (w
);
10910 if (last_unchanged_at_beg_row
)
10912 /* Avoid starting to display in the moddle of a character, a TAB
10913 for instance. This is easier than to set up the iterator
10914 exactly, and it's not a frequent case, so the additional
10915 effort wouldn't really pay off. */
10916 while (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row
)
10917 && last_unchanged_at_beg_row
> w
->current_matrix
->rows
)
10918 --last_unchanged_at_beg_row
;
10920 if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (last_unchanged_at_beg_row
))
10923 init_to_row_end (&it
, w
, last_unchanged_at_beg_row
);
10924 start_pos
= it
.current
.pos
;
10926 /* Start displaying new lines in the desired matrix at the same
10927 vpos we would use in the current matrix, i.e. below
10928 last_unchanged_at_beg_row. */
10929 it
.vpos
= 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row
,
10931 it
.glyph_row
= MATRIX_ROW (desired_matrix
, it
.vpos
);
10932 it
.current_y
= MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row
);
10934 xassert (it
.hpos
== 0 && it
.current_x
== 0);
10938 /* There are no reusable lines at the start of the window.
10939 Start displaying in the first line. */
10940 start_display (&it
, w
, start
);
10941 start_pos
= it
.current
.pos
;
10944 /* Find the first row that is not affected by changes at the end of
10945 the buffer. Value will be null if there is no unchanged row, in
10946 which case we must redisplay to the end of the window. delta
10947 will be set to the value by which buffer positions beginning with
10948 first_unchanged_at_end_row have to be adjusted due to text
10950 first_unchanged_at_end_row
10951 = find_first_unchanged_at_end_row (w
, &delta
, &delta_bytes
);
10952 IF_DEBUG (debug_delta
= delta
);
10953 IF_DEBUG (debug_delta_bytes
= delta_bytes
);
10955 /* Set stop_pos to the buffer position up to which we will have to
10956 display new lines. If first_unchanged_at_end_row != NULL, this
10957 is the buffer position of the start of the line displayed in that
10958 row. For first_unchanged_at_end_row == NULL, use 0 to indicate
10959 that we don't stop at a buffer position. */
10961 if (first_unchanged_at_end_row
)
10963 xassert (last_unchanged_at_beg_row
== NULL
10964 || first_unchanged_at_end_row
>= last_unchanged_at_beg_row
);
10966 /* If this is a continuation line, move forward to the next one
10967 that isn't. Changes in lines above affect this line.
10968 Caution: this may move first_unchanged_at_end_row to a row
10969 not displaying text. */
10970 while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row
)
10971 && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
)
10972 && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row
)
10973 < it
.last_visible_y
))
10974 ++first_unchanged_at_end_row
;
10976 if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
)
10977 || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row
)
10978 >= it
.last_visible_y
))
10979 first_unchanged_at_end_row
= NULL
;
10982 stop_pos
= (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row
)
10984 first_unchanged_at_end_vpos
10985 = MATRIX_ROW_VPOS (first_unchanged_at_end_row
, current_matrix
);
10986 xassert (stop_pos
>= Z
- END_UNCHANGED
);
10989 else if (last_unchanged_at_beg_row
== NULL
)
10995 /* Either there is no unchanged row at the end, or the one we have
10996 now displays text. This is a necessary condition for the window
10997 end pos calculation at the end of this function. */
10998 xassert (first_unchanged_at_end_row
== NULL
10999 || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
));
11001 debug_last_unchanged_at_beg_vpos
11002 = (last_unchanged_at_beg_row
11003 ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row
, current_matrix
)
11005 debug_first_unchanged_at_end_vpos
= first_unchanged_at_end_vpos
;
11007 #endif /* GLYPH_DEBUG != 0 */
11010 /* Display new lines. Set last_text_row to the last new line
11011 displayed which has text on it, i.e. might end up as being the
11012 line where the window_end_vpos is. */
11013 w
->cursor
.vpos
= -1;
11014 last_text_row
= NULL
;
11015 overlay_arrow_seen
= 0;
11016 while (it
.current_y
< it
.last_visible_y
11017 && !fonts_changed_p
11018 && (first_unchanged_at_end_row
== NULL
11019 || IT_CHARPOS (it
) < stop_pos
))
11021 if (display_line (&it
))
11022 last_text_row
= it
.glyph_row
- 1;
11025 if (fonts_changed_p
)
11029 /* Compute differences in buffer positions, y-positions etc. for
11030 lines reused at the bottom of the window. Compute what we can
11032 if (first_unchanged_at_end_row
11033 /* No lines reused because we displayed everything up to the
11034 bottom of the window. */
11035 && it
.current_y
< it
.last_visible_y
)
11038 - MATRIX_ROW_VPOS (first_unchanged_at_end_row
,
11040 dy
= it
.current_y
- first_unchanged_at_end_row
->y
;
11041 run
.current_y
= first_unchanged_at_end_row
->y
;
11042 run
.desired_y
= run
.current_y
+ dy
;
11043 run
.height
= it
.last_visible_y
- max (run
.current_y
, run
.desired_y
);
11047 delta
= dvpos
= dy
= run
.current_y
= run
.desired_y
= run
.height
= 0;
11048 first_unchanged_at_end_row
= NULL
;
11050 IF_DEBUG (debug_dvpos
= dvpos
; debug_dy
= dy
);
11053 /* Find the cursor if not already found. We have to decide whether
11054 PT will appear on this window (it sometimes doesn't, but this is
11055 not a very frequent case.) This decision has to be made before
11056 the current matrix is altered. A value of cursor.vpos < 0 means
11057 that PT is either in one of the lines beginning at
11058 first_unchanged_at_end_row or below the window. Don't care for
11059 lines that might be displayed later at the window end; as
11060 mentioned, this is not a frequent case. */
11061 if (w
->cursor
.vpos
< 0)
11063 /* Cursor in unchanged rows at the top? */
11064 if (PT
< CHARPOS (start_pos
)
11065 && last_unchanged_at_beg_row
)
11067 row
= row_containing_pos (w
, PT
,
11068 MATRIX_FIRST_TEXT_ROW (w
->current_matrix
),
11069 last_unchanged_at_beg_row
+ 1);
11071 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
11074 /* Start from first_unchanged_at_end_row looking for PT. */
11075 else if (first_unchanged_at_end_row
)
11077 row
= row_containing_pos (w
, PT
- delta
,
11078 first_unchanged_at_end_row
, NULL
);
11080 set_cursor_from_row (w
, row
, w
->current_matrix
, delta
,
11081 delta_bytes
, dy
, dvpos
);
11084 /* Give up if cursor was not found. */
11085 if (w
->cursor
.vpos
< 0)
11087 clear_glyph_matrix (w
->desired_matrix
);
11092 /* Don't let the cursor end in the scroll margins. */
11094 int this_scroll_margin
, cursor_height
;
11096 this_scroll_margin
= max (0, scroll_margin
);
11097 this_scroll_margin
= min (this_scroll_margin
,
11098 XFASTINT (w
->height
) / 4);
11099 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
11100 cursor_height
= MATRIX_ROW (w
->desired_matrix
, w
->cursor
.vpos
)->height
;
11102 if ((w
->cursor
.y
< this_scroll_margin
11103 && CHARPOS (start
) > BEGV
)
11104 /* Don't take scroll margin into account at the bottom because
11105 old redisplay didn't do it either. */
11106 || w
->cursor
.y
+ cursor_height
> it
.last_visible_y
)
11108 w
->cursor
.vpos
= -1;
11109 clear_glyph_matrix (w
->desired_matrix
);
11114 /* Scroll the display. Do it before changing the current matrix so
11115 that xterm.c doesn't get confused about where the cursor glyph is
11117 if (dy
&& run
.height
)
11121 if (FRAME_WINDOW_P (f
))
11123 rif
->update_window_begin_hook (w
);
11124 rif
->clear_mouse_face (w
);
11125 rif
->scroll_run_hook (w
, &run
);
11126 rif
->update_window_end_hook (w
, 0, 0);
11130 /* Terminal frame. In this case, dvpos gives the number of
11131 lines to scroll by; dvpos < 0 means scroll up. */
11132 int first_unchanged_at_end_vpos
11133 = MATRIX_ROW_VPOS (first_unchanged_at_end_row
, w
->current_matrix
);
11134 int from
= XFASTINT (w
->top
) + first_unchanged_at_end_vpos
;
11135 int end
= XFASTINT (w
->top
) + window_internal_height (w
);
11137 /* Perform the operation on the screen. */
11140 /* Scroll last_unchanged_at_beg_row to the end of the
11141 window down dvpos lines. */
11142 set_terminal_window (end
);
11144 /* On dumb terminals delete dvpos lines at the end
11145 before inserting dvpos empty lines. */
11146 if (!scroll_region_ok
)
11147 ins_del_lines (end
- dvpos
, -dvpos
);
11149 /* Insert dvpos empty lines in front of
11150 last_unchanged_at_beg_row. */
11151 ins_del_lines (from
, dvpos
);
11153 else if (dvpos
< 0)
11155 /* Scroll up last_unchanged_at_beg_vpos to the end of
11156 the window to last_unchanged_at_beg_vpos - |dvpos|. */
11157 set_terminal_window (end
);
11159 /* Delete dvpos lines in front of
11160 last_unchanged_at_beg_vpos. ins_del_lines will set
11161 the cursor to the given vpos and emit |dvpos| delete
11163 ins_del_lines (from
+ dvpos
, dvpos
);
11165 /* On a dumb terminal insert dvpos empty lines at the
11167 if (!scroll_region_ok
)
11168 ins_del_lines (end
+ dvpos
, -dvpos
);
11171 set_terminal_window (0);
11177 /* Shift reused rows of the current matrix to the right position.
11178 BOTTOM_ROW is the last + 1 row in the current matrix reserved for
11180 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (current_matrix
, w
);
11181 bottom_vpos
= MATRIX_ROW_VPOS (bottom_row
, current_matrix
);
11184 rotate_matrix (current_matrix
, first_unchanged_at_end_vpos
+ dvpos
,
11185 bottom_vpos
, dvpos
);
11186 enable_glyph_matrix_rows (current_matrix
, bottom_vpos
+ dvpos
,
11189 else if (dvpos
> 0)
11191 rotate_matrix (current_matrix
, first_unchanged_at_end_vpos
,
11192 bottom_vpos
, dvpos
);
11193 enable_glyph_matrix_rows (current_matrix
, first_unchanged_at_end_vpos
,
11194 first_unchanged_at_end_vpos
+ dvpos
, 0);
11197 /* For frame-based redisplay, make sure that current frame and window
11198 matrix are in sync with respect to glyph memory. */
11199 if (!FRAME_WINDOW_P (f
))
11200 sync_frame_with_window_matrix_rows (w
);
11202 /* Adjust buffer positions in reused rows. */
11204 increment_matrix_positions (current_matrix
,
11205 first_unchanged_at_end_vpos
+ dvpos
,
11206 bottom_vpos
, delta
, delta_bytes
);
11208 /* Adjust Y positions. */
11210 shift_glyph_matrix (w
, current_matrix
,
11211 first_unchanged_at_end_vpos
+ dvpos
,
11214 if (first_unchanged_at_end_row
)
11215 first_unchanged_at_end_row
+= dvpos
;
11217 /* If scrolling up, there may be some lines to display at the end of
11219 last_text_row_at_end
= NULL
;
11222 /* Set last_row to the glyph row in the current matrix where the
11223 window end line is found. It has been moved up or down in
11224 the matrix by dvpos. */
11225 int last_vpos
= XFASTINT (w
->window_end_vpos
) + dvpos
;
11226 struct glyph_row
*last_row
= MATRIX_ROW (current_matrix
, last_vpos
);
11228 /* If last_row is the window end line, it should display text. */
11229 xassert (last_row
->displays_text_p
);
11231 /* If window end line was partially visible before, begin
11232 displaying at that line. Otherwise begin displaying with the
11233 line following it. */
11234 if (MATRIX_ROW_BOTTOM_Y (last_row
) - dy
>= it
.last_visible_y
)
11236 init_to_row_start (&it
, w
, last_row
);
11237 it
.vpos
= last_vpos
;
11238 it
.current_y
= last_row
->y
;
11242 init_to_row_end (&it
, w
, last_row
);
11243 it
.vpos
= 1 + last_vpos
;
11244 it
.current_y
= MATRIX_ROW_BOTTOM_Y (last_row
);
11248 /* We may start in a continuation line. If so, we have to get
11249 the right continuation_lines_width and current_x. */
11250 it
.continuation_lines_width
= last_row
->continuation_lines_width
;
11251 it
.hpos
= it
.current_x
= 0;
11253 /* Display the rest of the lines at the window end. */
11254 it
.glyph_row
= MATRIX_ROW (desired_matrix
, it
.vpos
);
11255 while (it
.current_y
< it
.last_visible_y
11256 && !fonts_changed_p
)
11258 /* Is it always sure that the display agrees with lines in
11259 the current matrix? I don't think so, so we mark rows
11260 displayed invalid in the current matrix by setting their
11261 enabled_p flag to zero. */
11262 MATRIX_ROW (w
->current_matrix
, it
.vpos
)->enabled_p
= 0;
11263 if (display_line (&it
))
11264 last_text_row_at_end
= it
.glyph_row
- 1;
11268 /* Update window_end_pos and window_end_vpos. */
11269 if (first_unchanged_at_end_row
11270 && first_unchanged_at_end_row
->y
< it
.last_visible_y
11271 && !last_text_row_at_end
)
11273 /* Window end line if one of the preserved rows from the current
11274 matrix. Set row to the last row displaying text in current
11275 matrix starting at first_unchanged_at_end_row, after
11277 xassert (first_unchanged_at_end_row
->displays_text_p
);
11278 row
= find_last_row_displaying_text (w
->current_matrix
, &it
,
11279 first_unchanged_at_end_row
);
11280 xassert (row
&& MATRIX_ROW_DISPLAYS_TEXT_P (row
));
11282 XSETFASTINT (w
->window_end_pos
, Z
- MATRIX_ROW_END_CHARPOS (row
));
11283 w
->window_end_bytepos
= Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
);
11284 XSETFASTINT (w
->window_end_vpos
,
11285 MATRIX_ROW_VPOS (row
, w
->current_matrix
));
11287 else if (last_text_row_at_end
)
11289 XSETFASTINT (w
->window_end_pos
,
11290 Z
- MATRIX_ROW_END_CHARPOS (last_text_row_at_end
));
11291 w
->window_end_bytepos
11292 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row_at_end
);
11293 XSETFASTINT (w
->window_end_vpos
,
11294 MATRIX_ROW_VPOS (last_text_row_at_end
, desired_matrix
));
11296 else if (last_text_row
)
11298 /* We have displayed either to the end of the window or at the
11299 end of the window, i.e. the last row with text is to be found
11300 in the desired matrix. */
11301 XSETFASTINT (w
->window_end_pos
,
11302 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
11303 w
->window_end_bytepos
11304 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
11305 XSETFASTINT (w
->window_end_vpos
,
11306 MATRIX_ROW_VPOS (last_text_row
, desired_matrix
));
11308 else if (first_unchanged_at_end_row
== NULL
11309 && last_text_row
== NULL
11310 && last_text_row_at_end
== NULL
)
11312 /* Displayed to end of window, but no line containing text was
11313 displayed. Lines were deleted at the end of the window. */
11315 int header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0;
11317 for (vpos
= XFASTINT (w
->window_end_vpos
); vpos
> 0; --vpos
)
11318 if ((w
->desired_matrix
->rows
[vpos
+ header_line_p
].enabled_p
11319 && w
->desired_matrix
->rows
[vpos
+ header_line_p
].displays_text_p
)
11320 || (!w
->desired_matrix
->rows
[vpos
+ header_line_p
].enabled_p
11321 && w
->current_matrix
->rows
[vpos
+ header_line_p
].displays_text_p
))
11324 w
->window_end_vpos
= make_number (vpos
);
11329 IF_DEBUG (debug_end_pos
= XFASTINT (w
->window_end_pos
);
11330 debug_end_vpos
= XFASTINT (w
->window_end_vpos
));
11332 /* Record that display has not been completed. */
11333 w
->window_end_valid
= Qnil
;
11334 w
->desired_matrix
->no_scrolling_p
= 1;
11340 /***********************************************************************
11341 More debugging support
11342 ***********************************************************************/
11346 void dump_glyph_row
P_ ((struct glyph_matrix
*, int, int));
11347 void dump_glyph_matrix
P_ ((struct glyph_matrix
*, int));
11350 /* Dump the contents of glyph matrix MATRIX on stderr.
11352 GLYPHS 0 means don't show glyph contents.
11353 GLYPHS 1 means show glyphs in short form
11354 GLYPHS > 1 means show glyphs in long form. */
11357 dump_glyph_matrix (matrix
, glyphs
)
11358 struct glyph_matrix
*matrix
;
11362 for (i
= 0; i
< matrix
->nrows
; ++i
)
11363 dump_glyph_row (matrix
, i
, glyphs
);
11367 /* Dump the contents of glyph row at VPOS in MATRIX to stderr.
11368 GLYPHS 0 means don't show glyph contents.
11369 GLYPHS 1 means show glyphs in short form
11370 GLYPHS > 1 means show glyphs in long form. */
11373 dump_glyph_row (matrix
, vpos
, glyphs
)
11374 struct glyph_matrix
*matrix
;
11377 struct glyph_row
*row
;
11379 if (vpos
< 0 || vpos
>= matrix
->nrows
)
11382 row
= MATRIX_ROW (matrix
, vpos
);
11386 fprintf (stderr
, "Row Start End Used oEI><O\\CTZFesm X Y W H V A P\n");
11387 fprintf (stderr
, "=======================================================================\n");
11389 fprintf (stderr
, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d\
11390 %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d %4d %4d %4d %4d\n",
11391 row
- matrix
->rows
,
11392 MATRIX_ROW_START_CHARPOS (row
),
11393 MATRIX_ROW_END_CHARPOS (row
),
11394 row
->used
[TEXT_AREA
],
11395 row
->contains_overlapping_glyphs_p
,
11398 row
->truncated_on_left_p
,
11399 row
->truncated_on_right_p
,
11400 row
->overlay_arrow_p
,
11402 MATRIX_ROW_CONTINUATION_LINE_P (row
),
11403 row
->displays_text_p
,
11406 row
->ends_in_middle_of_char_p
,
11407 row
->starts_in_middle_of_char_p
,
11413 row
->visible_height
,
11416 fprintf (stderr
, "%9d %5d\n", row
->start
.overlay_string_index
,
11417 row
->end
.overlay_string_index
);
11418 fprintf (stderr
, "%9d %5d\n",
11419 CHARPOS (row
->start
.string_pos
),
11420 CHARPOS (row
->end
.string_pos
));
11421 fprintf (stderr
, "%9d %5d\n", row
->start
.dpvec_index
,
11422 row
->end
.dpvec_index
);
11427 struct glyph
*glyph
, *glyph_end
;
11428 int prev_had_glyphs_p
;
11430 glyph
= row
->glyphs
[TEXT_AREA
];
11431 glyph_end
= glyph
+ row
->used
[TEXT_AREA
];
11433 /* Glyph for a line end in text. */
11434 if (glyph
== glyph_end
&& glyph
->charpos
> 0)
11437 if (glyph
< glyph_end
)
11439 fprintf (stderr
, " Glyph Type Pos O W Code C Face LR\n");
11440 prev_had_glyphs_p
= 1;
11443 prev_had_glyphs_p
= 0;
11445 while (glyph
< glyph_end
)
11447 if (glyph
->type
== CHAR_GLYPH
)
11450 " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n",
11451 glyph
- row
->glyphs
[TEXT_AREA
],
11454 (BUFFERP (glyph
->object
)
11456 : (STRINGP (glyph
->object
)
11459 glyph
->pixel_width
,
11461 (glyph
->u
.ch
< 0x80 && glyph
->u
.ch
>= ' '
11465 glyph
->left_box_line_p
,
11466 glyph
->right_box_line_p
);
11468 else if (glyph
->type
== STRETCH_GLYPH
)
11471 " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n",
11472 glyph
- row
->glyphs
[TEXT_AREA
],
11475 (BUFFERP (glyph
->object
)
11477 : (STRINGP (glyph
->object
)
11480 glyph
->pixel_width
,
11484 glyph
->left_box_line_p
,
11485 glyph
->right_box_line_p
);
11487 else if (glyph
->type
== IMAGE_GLYPH
)
11490 " %5d %4c %6d %c %3d 0x%05x %c %4d %1.1d%1.1d\n",
11491 glyph
- row
->glyphs
[TEXT_AREA
],
11494 (BUFFERP (glyph
->object
)
11496 : (STRINGP (glyph
->object
)
11499 glyph
->pixel_width
,
11503 glyph
->left_box_line_p
,
11504 glyph
->right_box_line_p
);
11509 else if (glyphs
== 1)
11511 char *s
= (char *) alloca (row
->used
[TEXT_AREA
] + 1);
11514 for (i
= 0; i
< row
->used
[TEXT_AREA
]; ++i
)
11516 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + i
;
11517 if (glyph
->type
== CHAR_GLYPH
11518 && glyph
->u
.ch
< 0x80
11519 && glyph
->u
.ch
>= ' ')
11520 s
[i
] = glyph
->u
.ch
;
11526 fprintf (stderr
, "%3d: (%d) '%s'\n", vpos
, row
->enabled_p
, s
);
11531 DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix
,
11532 Sdump_glyph_matrix
, 0, 1, "p",
11533 "Dump the current matrix of the selected window to stderr.\n\
11534 Shows contents of glyph row structures. With non-nil\n\
11535 parameter GLYPHS, dump glyphs as well. If GLYPHS is 1 show\n\
11536 glyphs in short form, otherwise show glyphs in long form.")
11538 Lisp_Object glyphs
;
11540 struct window
*w
= XWINDOW (selected_window
);
11541 struct buffer
*buffer
= XBUFFER (w
->buffer
);
11543 fprintf (stderr
, "PT = %d, BEGV = %d. ZV = %d\n",
11544 BUF_PT (buffer
), BUF_BEGV (buffer
), BUF_ZV (buffer
));
11545 fprintf (stderr
, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n",
11546 w
->cursor
.x
, w
->cursor
.y
, w
->cursor
.hpos
, w
->cursor
.vpos
);
11547 fprintf (stderr
, "=============================================\n");
11548 dump_glyph_matrix (w
->current_matrix
,
11549 NILP (glyphs
) ? 0 : XINT (glyphs
));
11554 DEFUN ("dump-glyph-row", Fdump_glyph_row
, Sdump_glyph_row
, 1, 2, "",
11555 "Dump glyph row ROW to stderr.\n\
11556 GLYPH 0 means don't dump glyphs.\n\
11557 GLYPH 1 means dump glyphs in short form.\n\
11558 GLYPH > 1 or omitted means dump glyphs in long form.")
11560 Lisp_Object row
, glyphs
;
11562 CHECK_NUMBER (row
, 0);
11563 dump_glyph_row (XWINDOW (selected_window
)->current_matrix
,
11565 INTEGERP (glyphs
) ? XINT (glyphs
) : 2);
11570 DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row
, Sdump_tool_bar_row
, 1, 2, "",
11571 "Dump glyph row ROW of the tool-bar of the current frame to stderr.\n\
11572 GLYPH 0 means don't dump glyphs.\n\
11573 GLYPH 1 means dump glyphs in short form.\n\
11574 GLYPH > 1 or omitted means dump glyphs in long form.")
11576 Lisp_Object row
, glyphs
;
11578 struct frame
*sf
= SELECTED_FRAME ();
11579 struct glyph_matrix
*m
= (XWINDOW (sf
->tool_bar_window
)->current_matrix
);
11580 dump_glyph_row (m
, XINT (row
), INTEGERP (glyphs
) ? XINT (glyphs
) : 2);
11585 DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle
,
11586 Strace_redisplay_toggle
, 0, 0, "",
11587 "Toggle tracing of redisplay.")
11590 trace_redisplay_p
= !trace_redisplay_p
;
11595 DEFUN ("trace-to-stderr", Ftrace_to_stderr
, Strace_to_stderr
, 1, 1, "",
11596 "Print STRING to stderr.")
11598 Lisp_Object string
;
11600 CHECK_STRING (string
, 0);
11601 fprintf (stderr
, "%s", XSTRING (string
)->data
);
11605 #endif /* GLYPH_DEBUG */
11609 /***********************************************************************
11610 Building Desired Matrix Rows
11611 ***********************************************************************/
11613 /* Return a temporary glyph row holding the glyphs of an overlay
11614 arrow. Only used for non-window-redisplay windows. */
11616 static struct glyph_row
*
11617 get_overlay_arrow_glyph_row (w
)
11620 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
11621 struct buffer
*buffer
= XBUFFER (w
->buffer
);
11622 struct buffer
*old
= current_buffer
;
11623 unsigned char *arrow_string
= XSTRING (Voverlay_arrow_string
)->data
;
11624 int arrow_len
= XSTRING (Voverlay_arrow_string
)->size
;
11625 unsigned char *arrow_end
= arrow_string
+ arrow_len
;
11629 int n_glyphs_before
;
11631 set_buffer_temp (buffer
);
11632 init_iterator (&it
, w
, -1, -1, &scratch_glyph_row
, DEFAULT_FACE_ID
);
11633 it
.glyph_row
->used
[TEXT_AREA
] = 0;
11634 SET_TEXT_POS (it
.position
, 0, 0);
11636 multibyte_p
= !NILP (buffer
->enable_multibyte_characters
);
11638 while (p
< arrow_end
)
11640 Lisp_Object face
, ilisp
;
11642 /* Get the next character. */
11644 it
.c
= string_char_and_length (p
, arrow_len
, &it
.len
);
11646 it
.c
= *p
, it
.len
= 1;
11649 /* Get its face. */
11650 XSETFASTINT (ilisp
, p
- arrow_string
);
11651 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
11652 it
.face_id
= compute_char_face (f
, it
.c
, face
);
11654 /* Compute its width, get its glyphs. */
11655 n_glyphs_before
= it
.glyph_row
->used
[TEXT_AREA
];
11656 SET_TEXT_POS (it
.position
, -1, -1);
11657 PRODUCE_GLYPHS (&it
);
11659 /* If this character doesn't fit any more in the line, we have
11660 to remove some glyphs. */
11661 if (it
.current_x
> it
.last_visible_x
)
11663 it
.glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
;
11668 set_buffer_temp (old
);
11669 return it
.glyph_row
;
11673 /* Insert truncation glyphs at the start of IT->glyph_row. Truncation
11674 glyphs are only inserted for terminal frames since we can't really
11675 win with truncation glyphs when partially visible glyphs are
11676 involved. Which glyphs to insert is determined by
11677 produce_special_glyphs. */
11680 insert_left_trunc_glyphs (it
)
11683 struct it truncate_it
;
11684 struct glyph
*from
, *end
, *to
, *toend
;
11686 xassert (!FRAME_WINDOW_P (it
->f
));
11688 /* Get the truncation glyphs. */
11690 truncate_it
.current_x
= 0;
11691 truncate_it
.face_id
= DEFAULT_FACE_ID
;
11692 truncate_it
.glyph_row
= &scratch_glyph_row
;
11693 truncate_it
.glyph_row
->used
[TEXT_AREA
] = 0;
11694 CHARPOS (truncate_it
.position
) = BYTEPOS (truncate_it
.position
) = -1;
11695 truncate_it
.object
= make_number (0);
11696 produce_special_glyphs (&truncate_it
, IT_TRUNCATION
);
11698 /* Overwrite glyphs from IT with truncation glyphs. */
11699 from
= truncate_it
.glyph_row
->glyphs
[TEXT_AREA
];
11700 end
= from
+ truncate_it
.glyph_row
->used
[TEXT_AREA
];
11701 to
= it
->glyph_row
->glyphs
[TEXT_AREA
];
11702 toend
= to
+ it
->glyph_row
->used
[TEXT_AREA
];
11707 /* There may be padding glyphs left over. Overwrite them too. */
11708 while (to
< toend
&& CHAR_GLYPH_PADDING_P (*to
))
11710 from
= truncate_it
.glyph_row
->glyphs
[TEXT_AREA
];
11716 it
->glyph_row
->used
[TEXT_AREA
] = to
- it
->glyph_row
->glyphs
[TEXT_AREA
];
11720 /* Compute the pixel height and width of IT->glyph_row.
11722 Most of the time, ascent and height of a display line will be equal
11723 to the max_ascent and max_height values of the display iterator
11724 structure. This is not the case if
11726 1. We hit ZV without displaying anything. In this case, max_ascent
11727 and max_height will be zero.
11729 2. We have some glyphs that don't contribute to the line height.
11730 (The glyph row flag contributes_to_line_height_p is for future
11731 pixmap extensions).
11733 The first case is easily covered by using default values because in
11734 these cases, the line height does not really matter, except that it
11735 must not be zero. */
11738 compute_line_metrics (it
)
11741 struct glyph_row
*row
= it
->glyph_row
;
11744 if (FRAME_WINDOW_P (it
->f
))
11746 int i
, header_line_height
;
11748 /* The line may consist of one space only, that was added to
11749 place the cursor on it. If so, the row's height hasn't been
11751 if (row
->height
== 0)
11753 if (it
->max_ascent
+ it
->max_descent
== 0)
11754 it
->max_descent
= it
->max_phys_descent
= CANON_Y_UNIT (it
->f
);
11755 row
->ascent
= it
->max_ascent
;
11756 row
->height
= it
->max_ascent
+ it
->max_descent
;
11757 row
->phys_ascent
= it
->max_phys_ascent
;
11758 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
11761 /* Compute the width of this line. */
11762 row
->pixel_width
= row
->x
;
11763 for (i
= 0; i
< row
->used
[TEXT_AREA
]; ++i
)
11764 row
->pixel_width
+= row
->glyphs
[TEXT_AREA
][i
].pixel_width
;
11766 xassert (row
->pixel_width
>= 0);
11767 xassert (row
->ascent
>= 0 && row
->height
> 0);
11769 row
->overlapping_p
= (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
11770 || MATRIX_ROW_OVERLAPS_PRED_P (row
));
11772 /* If first line's physical ascent is larger than its logical
11773 ascent, use the physical ascent, and make the row taller.
11774 This makes accented characters fully visible. */
11775 if (row
== MATRIX_FIRST_TEXT_ROW (it
->w
->desired_matrix
)
11776 && row
->phys_ascent
> row
->ascent
)
11778 row
->height
+= row
->phys_ascent
- row
->ascent
;
11779 row
->ascent
= row
->phys_ascent
;
11782 /* Compute how much of the line is visible. */
11783 row
->visible_height
= row
->height
;
11785 header_line_height
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it
->w
);
11786 if (row
->y
< header_line_height
)
11787 row
->visible_height
-= header_line_height
- row
->y
;
11790 int max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it
->w
);
11791 if (row
->y
+ row
->height
> max_y
)
11792 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
11797 row
->pixel_width
= row
->used
[TEXT_AREA
];
11798 row
->ascent
= row
->phys_ascent
= 0;
11799 row
->height
= row
->phys_height
= row
->visible_height
= 1;
11802 /* Compute a hash code for this row. */
11804 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
11805 for (i
= 0; i
< row
->used
[area
]; ++i
)
11806 row
->hash
= ((((row
->hash
<< 4) + (row
->hash
>> 24)) & 0x0fffffff)
11807 + row
->glyphs
[area
][i
].u
.val
11808 + row
->glyphs
[area
][i
].face_id
11809 + row
->glyphs
[area
][i
].padding_p
11810 + (row
->glyphs
[area
][i
].type
<< 2));
11812 it
->max_ascent
= it
->max_descent
= 0;
11813 it
->max_phys_ascent
= it
->max_phys_descent
= 0;
11817 /* Append one space to the glyph row of iterator IT if doing a
11818 window-based redisplay. DEFAULT_FACE_P non-zero means let the
11819 space have the default face, otherwise let it have the same face as
11820 IT->face_id. Value is non-zero if a space was added.
11822 This function is called to make sure that there is always one glyph
11823 at the end of a glyph row that the cursor can be set on under
11824 window-systems. (If there weren't such a glyph we would not know
11825 how wide and tall a box cursor should be displayed).
11827 At the same time this space let's a nicely handle clearing to the
11828 end of the line if the row ends in italic text. */
11831 append_space (it
, default_face_p
)
11833 int default_face_p
;
11835 if (FRAME_WINDOW_P (it
->f
))
11837 int n
= it
->glyph_row
->used
[TEXT_AREA
];
11839 if (it
->glyph_row
->glyphs
[TEXT_AREA
] + n
11840 < it
->glyph_row
->glyphs
[1 + TEXT_AREA
])
11842 /* Save some values that must not be changed.
11843 Must save IT->c and IT->len because otherwise
11844 ITERATOR_AT_END_P wouldn't work anymore after
11845 append_space has been called. */
11846 enum display_element_type saved_what
= it
->what
;
11847 int saved_c
= it
->c
, saved_len
= it
->len
;
11848 int saved_x
= it
->current_x
;
11849 int saved_face_id
= it
->face_id
;
11850 struct text_pos saved_pos
;
11851 Lisp_Object saved_object
;
11854 saved_object
= it
->object
;
11855 saved_pos
= it
->position
;
11857 it
->what
= IT_CHARACTER
;
11858 bzero (&it
->position
, sizeof it
->position
);
11859 it
->object
= make_number (0);
11863 if (default_face_p
)
11864 it
->face_id
= DEFAULT_FACE_ID
;
11865 else if (it
->face_before_selective_p
)
11866 it
->face_id
= it
->saved_face_id
;
11867 face
= FACE_FROM_ID (it
->f
, it
->face_id
);
11868 it
->face_id
= FACE_FOR_CHAR (it
->f
, face
, 0);
11870 PRODUCE_GLYPHS (it
);
11872 it
->current_x
= saved_x
;
11873 it
->object
= saved_object
;
11874 it
->position
= saved_pos
;
11875 it
->what
= saved_what
;
11876 it
->face_id
= saved_face_id
;
11877 it
->len
= saved_len
;
11887 /* Extend the face of the last glyph in the text area of IT->glyph_row
11888 to the end of the display line. Called from display_line.
11889 If the glyph row is empty, add a space glyph to it so that we
11890 know the face to draw. Set the glyph row flag fill_line_p. */
11893 extend_face_to_end_of_line (it
)
11897 struct frame
*f
= it
->f
;
11899 /* If line is already filled, do nothing. */
11900 if (it
->current_x
>= it
->last_visible_x
)
11903 /* Face extension extends the background and box of IT->face_id
11904 to the end of the line. If the background equals the background
11905 of the frame, we don't have to do anything. */
11906 if (it
->face_before_selective_p
)
11907 face
= FACE_FROM_ID (it
->f
, it
->saved_face_id
);
11909 face
= FACE_FROM_ID (f
, it
->face_id
);
11911 if (FRAME_WINDOW_P (f
)
11912 && face
->box
== FACE_NO_BOX
11913 && face
->background
== FRAME_BACKGROUND_PIXEL (f
)
11917 /* Set the glyph row flag indicating that the face of the last glyph
11918 in the text area has to be drawn to the end of the text area. */
11919 it
->glyph_row
->fill_line_p
= 1;
11921 /* If current character of IT is not ASCII, make sure we have the
11922 ASCII face. This will be automatically undone the next time
11923 get_next_display_element returns a multibyte character. Note
11924 that the character will always be single byte in unibyte text. */
11925 if (!SINGLE_BYTE_CHAR_P (it
->c
))
11927 it
->face_id
= FACE_FOR_CHAR (f
, face
, 0);
11930 if (FRAME_WINDOW_P (f
))
11932 /* If the row is empty, add a space with the current face of IT,
11933 so that we know which face to draw. */
11934 if (it
->glyph_row
->used
[TEXT_AREA
] == 0)
11936 it
->glyph_row
->glyphs
[TEXT_AREA
][0] = space_glyph
;
11937 it
->glyph_row
->glyphs
[TEXT_AREA
][0].face_id
= it
->face_id
;
11938 it
->glyph_row
->used
[TEXT_AREA
] = 1;
11943 /* Save some values that must not be changed. */
11944 int saved_x
= it
->current_x
;
11945 struct text_pos saved_pos
;
11946 Lisp_Object saved_object
;
11947 enum display_element_type saved_what
= it
->what
;
11948 int saved_face_id
= it
->face_id
;
11950 saved_object
= it
->object
;
11951 saved_pos
= it
->position
;
11953 it
->what
= IT_CHARACTER
;
11954 bzero (&it
->position
, sizeof it
->position
);
11955 it
->object
= make_number (0);
11958 it
->face_id
= face
->id
;
11960 PRODUCE_GLYPHS (it
);
11962 while (it
->current_x
<= it
->last_visible_x
)
11963 PRODUCE_GLYPHS (it
);
11965 /* Don't count these blanks really. It would let us insert a left
11966 truncation glyph below and make us set the cursor on them, maybe. */
11967 it
->current_x
= saved_x
;
11968 it
->object
= saved_object
;
11969 it
->position
= saved_pos
;
11970 it
->what
= saved_what
;
11971 it
->face_id
= saved_face_id
;
11976 /* Value is non-zero if text starting at CHARPOS in current_buffer is
11977 trailing whitespace. */
11980 trailing_whitespace_p (charpos
)
11983 int bytepos
= CHAR_TO_BYTE (charpos
);
11986 while (bytepos
< ZV_BYTE
11987 && (c
= FETCH_CHAR (bytepos
),
11988 c
== ' ' || c
== '\t'))
11991 if (bytepos
>= ZV_BYTE
|| c
== '\n' || c
== '\r')
11993 if (bytepos
!= PT_BYTE
)
12000 /* Highlight trailing whitespace, if any, in ROW. */
12003 highlight_trailing_whitespace (f
, row
)
12005 struct glyph_row
*row
;
12007 int used
= row
->used
[TEXT_AREA
];
12011 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
12012 struct glyph
*glyph
= start
+ used
- 1;
12014 /* Skip over the space glyph inserted to display the
12015 cursor at the end of a line. */
12016 if (glyph
->type
== CHAR_GLYPH
12017 && glyph
->u
.ch
== ' '
12018 && INTEGERP (glyph
->object
))
12021 /* If last glyph is a space or stretch, and it's trailing
12022 whitespace, set the face of all trailing whitespace glyphs in
12023 IT->glyph_row to `trailing-whitespace'. */
12025 && BUFFERP (glyph
->object
)
12026 && (glyph
->type
== STRETCH_GLYPH
12027 || (glyph
->type
== CHAR_GLYPH
12028 && glyph
->u
.ch
== ' '))
12029 && trailing_whitespace_p (glyph
->charpos
))
12031 int face_id
= lookup_named_face (f
, Qtrailing_whitespace
, 0);
12033 while (glyph
>= start
12034 && BUFFERP (glyph
->object
)
12035 && (glyph
->type
== STRETCH_GLYPH
12036 || (glyph
->type
== CHAR_GLYPH
12037 && glyph
->u
.ch
== ' ')))
12038 (glyph
--)->face_id
= face_id
;
12044 /* Value is non-zero if glyph row ROW in window W should be
12045 used to hold the cursor. */
12048 cursor_row_p (w
, row
)
12050 struct glyph_row
*row
;
12052 int cursor_row_p
= 1;
12054 if (PT
== MATRIX_ROW_END_CHARPOS (row
))
12056 /* If the row ends with a newline from a string, we don't want
12057 the cursor there (if the row is continued it doesn't end in a
12059 if (CHARPOS (row
->end
.string_pos
) >= 0
12060 || MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
))
12061 cursor_row_p
= row
->continued_p
;
12063 /* If the row ends at ZV, display the cursor at the end of that
12064 row instead of at the start of the row below. */
12065 else if (row
->ends_at_zv_p
)
12071 return cursor_row_p
;
12075 /* Construct the glyph row IT->glyph_row in the desired matrix of
12076 IT->w from text at the current position of IT. See dispextern.h
12077 for an overview of struct it. Value is non-zero if
12078 IT->glyph_row displays text, as opposed to a line displaying ZV
12085 struct glyph_row
*row
= it
->glyph_row
;
12087 /* We always start displaying at hpos zero even if hscrolled. */
12088 xassert (it
->hpos
== 0 && it
->current_x
== 0);
12090 /* We must not display in a row that's not a text row. */
12091 xassert (MATRIX_ROW_VPOS (row
, it
->w
->desired_matrix
)
12092 < it
->w
->desired_matrix
->nrows
);
12094 /* Is IT->w showing the region? */
12095 it
->w
->region_showing
= it
->region_beg_charpos
> 0 ? Qt
: Qnil
;
12097 /* Clear the result glyph row and enable it. */
12098 prepare_desired_row (row
);
12100 row
->y
= it
->current_y
;
12101 row
->start
= it
->current
;
12102 row
->continuation_lines_width
= it
->continuation_lines_width
;
12103 row
->displays_text_p
= 1;
12104 row
->starts_in_middle_of_char_p
= it
->starts_in_middle_of_char_p
;
12105 it
->starts_in_middle_of_char_p
= 0;
12107 /* Arrange the overlays nicely for our purposes. Usually, we call
12108 display_line on only one line at a time, in which case this
12109 can't really hurt too much, or we call it on lines which appear
12110 one after another in the buffer, in which case all calls to
12111 recenter_overlay_lists but the first will be pretty cheap. */
12112 recenter_overlay_lists (current_buffer
, IT_CHARPOS (*it
));
12114 /* Move over display elements that are not visible because we are
12115 hscrolled. This may stop at an x-position < IT->first_visible_x
12116 if the first glyph is partially visible or if we hit a line end. */
12117 if (it
->current_x
< it
->first_visible_x
)
12118 move_it_in_display_line_to (it
, ZV
, it
->first_visible_x
,
12119 MOVE_TO_POS
| MOVE_TO_X
);
12121 /* Get the initial row height. This is either the height of the
12122 text hscrolled, if there is any, or zero. */
12123 row
->ascent
= it
->max_ascent
;
12124 row
->height
= it
->max_ascent
+ it
->max_descent
;
12125 row
->phys_ascent
= it
->max_phys_ascent
;
12126 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
12128 /* Loop generating characters. The loop is left with IT on the next
12129 character to display. */
12132 int n_glyphs_before
, hpos_before
, x_before
;
12134 int ascent
= 0, descent
= 0, phys_ascent
= 0, phys_descent
= 0;
12136 /* Retrieve the next thing to display. Value is zero if end of
12138 if (!get_next_display_element (it
))
12140 /* Maybe add a space at the end of this line that is used to
12141 display the cursor there under X. Set the charpos of the
12142 first glyph of blank lines not corresponding to any text
12144 if ((append_space (it
, 1) && row
->used
[TEXT_AREA
] == 1)
12145 || row
->used
[TEXT_AREA
] == 0)
12147 row
->glyphs
[TEXT_AREA
]->charpos
= -1;
12148 row
->displays_text_p
= 0;
12150 if (!NILP (XBUFFER (it
->w
->buffer
)->indicate_empty_lines
))
12151 row
->indicate_empty_line_p
= 1;
12154 it
->continuation_lines_width
= 0;
12155 row
->ends_at_zv_p
= 1;
12159 /* Now, get the metrics of what we want to display. This also
12160 generates glyphs in `row' (which is IT->glyph_row). */
12161 n_glyphs_before
= row
->used
[TEXT_AREA
];
12164 /* Remember the line height so far in case the next element doesn't
12165 fit on the line. */
12166 if (!it
->truncate_lines_p
)
12168 ascent
= it
->max_ascent
;
12169 descent
= it
->max_descent
;
12170 phys_ascent
= it
->max_phys_ascent
;
12171 phys_descent
= it
->max_phys_descent
;
12174 PRODUCE_GLYPHS (it
);
12176 /* If this display element was in marginal areas, continue with
12178 if (it
->area
!= TEXT_AREA
)
12180 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
12181 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
12182 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
12183 row
->phys_height
= max (row
->phys_height
,
12184 it
->max_phys_ascent
+ it
->max_phys_descent
);
12185 set_iterator_to_next (it
, 1);
12189 /* Does the display element fit on the line? If we truncate
12190 lines, we should draw past the right edge of the window. If
12191 we don't truncate, we want to stop so that we can display the
12192 continuation glyph before the right margin. If lines are
12193 continued, there are two possible strategies for characters
12194 resulting in more than 1 glyph (e.g. tabs): Display as many
12195 glyphs as possible in this line and leave the rest for the
12196 continuation line, or display the whole element in the next
12197 line. Original redisplay did the former, so we do it also. */
12198 nglyphs
= row
->used
[TEXT_AREA
] - n_glyphs_before
;
12199 hpos_before
= it
->hpos
;
12203 /* A wide multibyte character produces multiple glyphs on
12205 || !SINGLE_BYTE_CHAR_P (it
->c
))
12206 && it
->current_x
< it
->last_visible_x
)
12208 it
->hpos
+= nglyphs
;
12209 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
12210 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
12211 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
12212 row
->phys_height
= max (row
->phys_height
,
12213 it
->max_phys_ascent
+ it
->max_phys_descent
);
12214 if (it
->current_x
- it
->pixel_width
< it
->first_visible_x
)
12215 row
->x
= x
- it
->first_visible_x
;
12220 struct glyph
*glyph
;
12222 for (i
= 0; i
< nglyphs
; ++i
, x
= new_x
)
12224 glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
12225 new_x
= x
+ glyph
->pixel_width
;
12227 if (/* Lines are continued. */
12228 !it
->truncate_lines_p
12229 && (/* Glyph doesn't fit on the line. */
12230 new_x
> it
->last_visible_x
12231 /* Or it fits exactly on a window system frame. */
12232 || (new_x
== it
->last_visible_x
12233 && FRAME_WINDOW_P (it
->f
))))
12235 /* End of a continued line. */
12238 || (new_x
== it
->last_visible_x
12239 && FRAME_WINDOW_P (it
->f
)))
12241 /* Current glyph is the only one on the line or
12242 fits exactly on the line. We must continue
12243 the line because we can't draw the cursor
12244 after the glyph. */
12245 row
->continued_p
= 1;
12246 it
->current_x
= new_x
;
12247 it
->continuation_lines_width
+= new_x
;
12249 if (i
== nglyphs
- 1)
12250 set_iterator_to_next (it
, 1);
12252 else if (CHAR_GLYPH_PADDING_P (*glyph
)
12253 && !FRAME_WINDOW_P (it
->f
))
12255 /* A padding glyph that doesn't fit on this line.
12256 This means the whole character doesn't fit
12258 row
->used
[TEXT_AREA
] = n_glyphs_before
;
12260 /* Fill the rest of the row with continuation
12261 glyphs like in 20.x. */
12262 while (row
->glyphs
[TEXT_AREA
] + row
->used
[TEXT_AREA
]
12263 < row
->glyphs
[1 + TEXT_AREA
])
12264 produce_special_glyphs (it
, IT_CONTINUATION
);
12266 row
->continued_p
= 1;
12267 it
->current_x
= x_before
;
12268 it
->continuation_lines_width
+= x_before
;
12270 /* Restore the height to what it was before the
12271 element not fitting on the line. */
12272 it
->max_ascent
= ascent
;
12273 it
->max_descent
= descent
;
12274 it
->max_phys_ascent
= phys_ascent
;
12275 it
->max_phys_descent
= phys_descent
;
12279 /* Display element draws past the right edge of
12280 the window. Restore positions to values
12281 before the element. The next line starts
12282 with current_x before the glyph that could
12283 not be displayed, so that TAB works right. */
12284 row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
12286 /* Display continuation glyphs. */
12287 if (!FRAME_WINDOW_P (it
->f
))
12288 produce_special_glyphs (it
, IT_CONTINUATION
);
12289 row
->continued_p
= 1;
12292 it
->continuation_lines_width
+= x
;
12293 if (nglyphs
> 1 && i
> 0)
12295 row
->ends_in_middle_of_char_p
= 1;
12296 it
->starts_in_middle_of_char_p
= 1;
12299 /* Restore the height to what it was before the
12300 element not fitting on the line. */
12301 it
->max_ascent
= ascent
;
12302 it
->max_descent
= descent
;
12303 it
->max_phys_ascent
= phys_ascent
;
12304 it
->max_phys_descent
= phys_descent
;
12309 else if (new_x
> it
->first_visible_x
)
12311 /* Increment number of glyphs actually displayed. */
12314 if (x
< it
->first_visible_x
)
12315 /* Glyph is partially visible, i.e. row starts at
12316 negative X position. */
12317 row
->x
= x
- it
->first_visible_x
;
12321 /* Glyph is completely off the left margin of the
12322 window. This should not happen because of the
12323 move_it_in_display_line at the start of
12329 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
12330 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
12331 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
12332 row
->phys_height
= max (row
->phys_height
,
12333 it
->max_phys_ascent
+ it
->max_phys_descent
);
12335 /* End of this display line if row is continued. */
12336 if (row
->continued_p
)
12340 /* Is this a line end? If yes, we're also done, after making
12341 sure that a non-default face is extended up to the right
12342 margin of the window. */
12343 if (ITERATOR_AT_END_OF_LINE_P (it
))
12345 int used_before
= row
->used
[TEXT_AREA
];
12347 /* Add a space at the end of the line that is used to
12348 display the cursor there. */
12349 append_space (it
, 0);
12351 /* Extend the face to the end of the line. */
12352 extend_face_to_end_of_line (it
);
12354 /* Make sure we have the position. */
12355 if (used_before
== 0)
12356 row
->glyphs
[TEXT_AREA
]->charpos
= CHARPOS (it
->position
);
12358 /* Consume the line end. This skips over invisible lines. */
12359 set_iterator_to_next (it
, 1);
12360 it
->continuation_lines_width
= 0;
12364 /* Proceed with next display element. Note that this skips
12365 over lines invisible because of selective display. */
12366 set_iterator_to_next (it
, 1);
12368 /* If we truncate lines, we are done when the last displayed
12369 glyphs reach past the right margin of the window. */
12370 if (it
->truncate_lines_p
12371 && (FRAME_WINDOW_P (it
->f
)
12372 ? (it
->current_x
>= it
->last_visible_x
)
12373 : (it
->current_x
> it
->last_visible_x
)))
12375 /* Maybe add truncation glyphs. */
12376 if (!FRAME_WINDOW_P (it
->f
))
12380 for (i
= row
->used
[TEXT_AREA
] - 1; i
> 0; --i
)
12381 if (!CHAR_GLYPH_PADDING_P (row
->glyphs
[TEXT_AREA
][i
]))
12384 for (n
= row
->used
[TEXT_AREA
]; i
< n
; ++i
)
12386 row
->used
[TEXT_AREA
] = i
;
12387 produce_special_glyphs (it
, IT_TRUNCATION
);
12391 row
->truncated_on_right_p
= 1;
12392 it
->continuation_lines_width
= 0;
12393 reseat_at_next_visible_line_start (it
, 0);
12394 row
->ends_at_zv_p
= FETCH_BYTE (IT_BYTEPOS (*it
) - 1) != '\n';
12395 it
->hpos
= hpos_before
;
12396 it
->current_x
= x_before
;
12401 /* If line is not empty and hscrolled, maybe insert truncation glyphs
12402 at the left window margin. */
12403 if (it
->first_visible_x
12404 && IT_CHARPOS (*it
) != MATRIX_ROW_START_CHARPOS (row
))
12406 if (!FRAME_WINDOW_P (it
->f
))
12407 insert_left_trunc_glyphs (it
);
12408 row
->truncated_on_left_p
= 1;
12411 /* If the start of this line is the overlay arrow-position, then
12412 mark this glyph row as the one containing the overlay arrow.
12413 This is clearly a mess with variable size fonts. It would be
12414 better to let it be displayed like cursors under X. */
12415 if (MARKERP (Voverlay_arrow_position
)
12416 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
12417 && (MATRIX_ROW_START_CHARPOS (row
)
12418 == marker_position (Voverlay_arrow_position
))
12419 && STRINGP (Voverlay_arrow_string
)
12420 && ! overlay_arrow_seen
)
12422 /* Overlay arrow in window redisplay is a bitmap. */
12423 if (!FRAME_WINDOW_P (it
->f
))
12425 struct glyph_row
*arrow_row
= get_overlay_arrow_glyph_row (it
->w
);
12426 struct glyph
*glyph
= arrow_row
->glyphs
[TEXT_AREA
];
12427 struct glyph
*arrow_end
= glyph
+ arrow_row
->used
[TEXT_AREA
];
12428 struct glyph
*p
= row
->glyphs
[TEXT_AREA
];
12429 struct glyph
*p2
, *end
;
12431 /* Copy the arrow glyphs. */
12432 while (glyph
< arrow_end
)
12435 /* Throw away padding glyphs. */
12437 end
= row
->glyphs
[TEXT_AREA
] + row
->used
[TEXT_AREA
];
12438 while (p2
< end
&& CHAR_GLYPH_PADDING_P (*p2
))
12444 row
->used
[TEXT_AREA
] = p2
- row
->glyphs
[TEXT_AREA
];
12448 overlay_arrow_seen
= 1;
12449 row
->overlay_arrow_p
= 1;
12452 /* Compute pixel dimensions of this line. */
12453 compute_line_metrics (it
);
12455 /* Remember the position at which this line ends. */
12456 row
->end
= it
->current
;
12458 /* Maybe set the cursor. */
12459 if (it
->w
->cursor
.vpos
< 0
12460 && PT
>= MATRIX_ROW_START_CHARPOS (row
)
12461 && PT
<= MATRIX_ROW_END_CHARPOS (row
)
12462 && cursor_row_p (it
->w
, row
))
12463 set_cursor_from_row (it
->w
, row
, it
->w
->desired_matrix
, 0, 0, 0, 0);
12465 /* Highlight trailing whitespace. */
12466 if (!NILP (Vshow_trailing_whitespace
))
12467 highlight_trailing_whitespace (it
->f
, it
->glyph_row
);
12469 /* Prepare for the next line. This line starts horizontally at (X
12470 HPOS) = (0 0). Vertical positions are incremented. As a
12471 convenience for the caller, IT->glyph_row is set to the next
12473 it
->current_x
= it
->hpos
= 0;
12474 it
->current_y
+= row
->height
;
12477 return row
->displays_text_p
;
12482 /***********************************************************************
12484 ***********************************************************************/
12486 /* Redisplay the menu bar in the frame for window W.
12488 The menu bar of X frames that don't have X toolkit support is
12489 displayed in a special window W->frame->menu_bar_window.
12491 The menu bar of terminal frames is treated specially as far as
12492 glyph matrices are concerned. Menu bar lines are not part of
12493 windows, so the update is done directly on the frame matrix rows
12494 for the menu bar. */
12497 display_menu_bar (w
)
12500 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
12505 /* Don't do all this for graphical frames. */
12507 if (!NILP (Vwindow_system
))
12510 #ifdef USE_X_TOOLKIT
12515 if (FRAME_MAC_P (f
))
12519 #ifdef USE_X_TOOLKIT
12520 xassert (!FRAME_WINDOW_P (f
));
12521 init_iterator (&it
, w
, -1, -1, f
->desired_matrix
->rows
, MENU_FACE_ID
);
12522 it
.first_visible_x
= 0;
12523 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
12524 #else /* not USE_X_TOOLKIT */
12525 if (FRAME_WINDOW_P (f
))
12527 /* Menu bar lines are displayed in the desired matrix of the
12528 dummy window menu_bar_window. */
12529 struct window
*menu_w
;
12530 xassert (WINDOWP (f
->menu_bar_window
));
12531 menu_w
= XWINDOW (f
->menu_bar_window
);
12532 init_iterator (&it
, menu_w
, -1, -1, menu_w
->desired_matrix
->rows
,
12534 it
.first_visible_x
= 0;
12535 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
12539 /* This is a TTY frame, i.e. character hpos/vpos are used as
12541 init_iterator (&it
, w
, -1, -1, f
->desired_matrix
->rows
,
12543 it
.first_visible_x
= 0;
12544 it
.last_visible_x
= FRAME_WIDTH (f
);
12546 #endif /* not USE_X_TOOLKIT */
12548 if (! mode_line_inverse_video
)
12549 /* Force the menu-bar to be displayed in the default face. */
12550 it
.base_face_id
= it
.face_id
= DEFAULT_FACE_ID
;
12552 /* Clear all rows of the menu bar. */
12553 for (i
= 0; i
< FRAME_MENU_BAR_LINES (f
); ++i
)
12555 struct glyph_row
*row
= it
.glyph_row
+ i
;
12556 clear_glyph_row (row
);
12557 row
->enabled_p
= 1;
12558 row
->full_width_p
= 1;
12561 /* Display all items of the menu bar. */
12562 items
= FRAME_MENU_BAR_ITEMS (it
.f
);
12563 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
12565 Lisp_Object string
;
12567 /* Stop at nil string. */
12568 string
= XVECTOR (items
)->contents
[i
+ 1];
12572 /* Remember where item was displayed. */
12573 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], it
.hpos
);
12575 /* Display the item, pad with one space. */
12576 if (it
.current_x
< it
.last_visible_x
)
12577 display_string (NULL
, string
, Qnil
, 0, 0, &it
,
12578 XSTRING (string
)->size
+ 1, 0, 0, -1);
12581 /* Fill out the line with spaces. */
12582 if (it
.current_x
< it
.last_visible_x
)
12583 display_string ("", Qnil
, Qnil
, 0, 0, &it
, -1, 0, 0, -1);
12585 /* Compute the total height of the lines. */
12586 compute_line_metrics (&it
);
12591 /***********************************************************************
12593 ***********************************************************************/
12595 /* Redisplay mode lines in the window tree whose root is WINDOW. If
12596 FORCE is non-zero, redisplay mode lines unconditionally.
12597 Otherwise, redisplay only mode lines that are garbaged. Value is
12598 the number of windows whose mode lines were redisplayed. */
12601 redisplay_mode_lines (window
, force
)
12602 Lisp_Object window
;
12607 while (!NILP (window
))
12609 struct window
*w
= XWINDOW (window
);
12611 if (WINDOWP (w
->hchild
))
12612 nwindows
+= redisplay_mode_lines (w
->hchild
, force
);
12613 else if (WINDOWP (w
->vchild
))
12614 nwindows
+= redisplay_mode_lines (w
->vchild
, force
);
12616 || FRAME_GARBAGED_P (XFRAME (w
->frame
))
12617 || !MATRIX_MODE_LINE_ROW (w
->current_matrix
)->enabled_p
)
12619 Lisp_Object old_selected_frame
;
12620 struct text_pos lpoint
;
12621 struct buffer
*old
= current_buffer
;
12623 /* Set the window's buffer for the mode line display. */
12624 SET_TEXT_POS (lpoint
, PT
, PT_BYTE
);
12625 set_buffer_internal_1 (XBUFFER (w
->buffer
));
12627 /* Point refers normally to the selected window. For any
12628 other window, set up appropriate value. */
12629 if (!EQ (window
, selected_window
))
12631 struct text_pos pt
;
12633 SET_TEXT_POS_FROM_MARKER (pt
, w
->pointm
);
12634 if (CHARPOS (pt
) < BEGV
)
12635 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
12636 else if (CHARPOS (pt
) > (ZV
- 1))
12637 TEMP_SET_PT_BOTH (ZV
, ZV_BYTE
);
12639 TEMP_SET_PT_BOTH (CHARPOS (pt
), BYTEPOS (pt
));
12642 /* Temporarily set up the selected frame. */
12643 old_selected_frame
= selected_frame
;
12644 selected_frame
= w
->frame
;
12646 /* Display mode lines. */
12647 clear_glyph_matrix (w
->desired_matrix
);
12648 if (display_mode_lines (w
))
12651 w
->must_be_updated_p
= 1;
12654 /* Restore old settings. */
12655 selected_frame
= old_selected_frame
;
12656 set_buffer_internal_1 (old
);
12657 TEMP_SET_PT_BOTH (CHARPOS (lpoint
), BYTEPOS (lpoint
));
12667 /* Display the mode and/or top line of window W. Value is the number
12668 of mode lines displayed. */
12671 display_mode_lines (w
)
12676 /* These will be set while the mode line specs are processed. */
12677 line_number_displayed
= 0;
12678 w
->column_number_displayed
= Qnil
;
12680 if (WINDOW_WANTS_MODELINE_P (w
))
12682 display_mode_line (w
, MODE_LINE_FACE_ID
,
12683 current_buffer
->mode_line_format
);
12687 if (WINDOW_WANTS_HEADER_LINE_P (w
))
12689 display_mode_line (w
, HEADER_LINE_FACE_ID
,
12690 current_buffer
->header_line_format
);
12698 /* Display mode or top line of window W. FACE_ID specifies which line
12699 to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID.
12700 FORMAT is the mode line format to display. Value is the pixel
12701 height of the mode line displayed. */
12704 display_mode_line (w
, face_id
, format
)
12706 enum face_id face_id
;
12707 Lisp_Object format
;
12712 init_iterator (&it
, w
, -1, -1, NULL
, face_id
);
12713 prepare_desired_row (it
.glyph_row
);
12715 if (! mode_line_inverse_video
)
12716 /* Force the mode-line to be displayed in the default face. */
12717 it
.base_face_id
= it
.face_id
= DEFAULT_FACE_ID
;
12719 /* Temporarily make frame's keyboard the current kboard so that
12720 kboard-local variables in the mode_line_format will get the right
12722 push_frame_kboard (it
.f
);
12723 display_mode_element (&it
, 0, 0, 0, format
);
12724 pop_frame_kboard ();
12726 /* Fill up with spaces. */
12727 display_string (" ", Qnil
, Qnil
, 0, 0, &it
, 10000, -1, -1, 0);
12729 compute_line_metrics (&it
);
12730 it
.glyph_row
->full_width_p
= 1;
12731 it
.glyph_row
->mode_line_p
= 1;
12732 it
.glyph_row
->inverse_p
= 0;
12733 it
.glyph_row
->continued_p
= 0;
12734 it
.glyph_row
->truncated_on_left_p
= 0;
12735 it
.glyph_row
->truncated_on_right_p
= 0;
12737 /* Make a 3D mode-line have a shadow at its right end. */
12738 face
= FACE_FROM_ID (it
.f
, face_id
);
12739 extend_face_to_end_of_line (&it
);
12740 if (face
->box
!= FACE_NO_BOX
)
12742 struct glyph
*last
= (it
.glyph_row
->glyphs
[TEXT_AREA
]
12743 + it
.glyph_row
->used
[TEXT_AREA
] - 1);
12744 last
->right_box_line_p
= 1;
12747 return it
.glyph_row
->height
;
12751 /* Contribute ELT to the mode line for window IT->w. How it
12752 translates into text depends on its data type.
12754 IT describes the display environment in which we display, as usual.
12756 DEPTH is the depth in recursion. It is used to prevent
12757 infinite recursion here.
12759 FIELD_WIDTH is the number of characters the display of ELT should
12760 occupy in the mode line, and PRECISION is the maximum number of
12761 characters to display from ELT's representation. See
12762 display_string for details. *
12764 Returns the hpos of the end of the text generated by ELT. */
12767 display_mode_element (it
, depth
, field_width
, precision
, elt
)
12770 int field_width
, precision
;
12773 int n
= 0, field
, prec
;
12781 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
12785 /* A string: output it and check for %-constructs within it. */
12787 unsigned char *this = XSTRING (elt
)->data
;
12788 unsigned char *lisp_string
= this;
12790 while ((precision
<= 0 || n
< precision
)
12792 && (frame_title_ptr
12793 || it
->current_x
< it
->last_visible_x
))
12795 unsigned char *last
= this;
12797 /* Advance to end of string or next format specifier. */
12798 while ((c
= *this++) != '\0' && c
!= '%')
12801 if (this - 1 != last
)
12803 /* Output to end of string or up to '%'. Field width
12804 is length of string. Don't output more than
12805 PRECISION allows us. */
12806 prec
= --this - last
;
12807 if (precision
> 0 && prec
> precision
- n
)
12808 prec
= precision
- n
;
12810 if (frame_title_ptr
)
12811 n
+= store_frame_title (last
, prec
, prec
);
12813 n
+= display_string (NULL
, elt
, Qnil
, 0, last
- lisp_string
,
12814 it
, 0, prec
, 0, -1);
12816 else /* c == '%' */
12818 unsigned char *percent_position
= this;
12820 /* Get the specified minimum width. Zero means
12823 while ((c
= *this++) >= '0' && c
<= '9')
12824 field
= field
* 10 + c
- '0';
12826 /* Don't pad beyond the total padding allowed. */
12827 if (field_width
- n
> 0 && field
> field_width
- n
)
12828 field
= field_width
- n
;
12830 /* Note that either PRECISION <= 0 or N < PRECISION. */
12831 prec
= precision
- n
;
12834 n
+= display_mode_element (it
, depth
, field
, prec
,
12835 Vglobal_mode_string
);
12838 unsigned char *spec
12839 = decode_mode_spec (it
->w
, c
, field
, prec
);
12841 if (frame_title_ptr
)
12842 n
+= store_frame_title (spec
, field
, prec
);
12846 = it
->glyph_row
->used
[TEXT_AREA
];
12848 = percent_position
- XSTRING (elt
)->data
;
12850 = display_string (spec
, Qnil
, elt
, charpos
, 0, it
,
12851 field
, prec
, 0, -1);
12853 /* Assign to the glyphs written above the
12854 string where the `%x' came from, position
12858 struct glyph
*glyph
12859 = (it
->glyph_row
->glyphs
[TEXT_AREA
]
12863 for (i
= 0; i
< nwritten
; ++i
)
12865 glyph
[i
].object
= elt
;
12866 glyph
[i
].charpos
= charpos
;
12879 /* A symbol: process the value of the symbol recursively
12880 as if it appeared here directly. Avoid error if symbol void.
12881 Special case: if value of symbol is a string, output the string
12884 register Lisp_Object tem
;
12885 tem
= Fboundp (elt
);
12888 tem
= Fsymbol_value (elt
);
12889 /* If value is a string, output that string literally:
12890 don't check for % within it. */
12893 prec
= XSTRING (tem
)->size
;
12894 if (precision
> 0 && prec
> precision
- n
)
12895 prec
= precision
- n
;
12896 if (frame_title_ptr
)
12897 n
+= store_frame_title (XSTRING (tem
)->data
, -1, prec
);
12899 n
+= display_string (NULL
, tem
, Qnil
, 0, 0, it
,
12902 else if (!EQ (tem
, elt
))
12904 /* Give up right away for nil or t. */
12914 register Lisp_Object car
, tem
;
12916 /* A cons cell: three distinct cases.
12917 If first element is a string or a cons, process all the elements
12918 and effectively concatenate them.
12919 If first element is a negative number, truncate displaying cdr to
12920 at most that many characters. If positive, pad (with spaces)
12921 to at least that many characters.
12922 If first element is a symbol, process the cadr or caddr recursively
12923 according to whether the symbol's value is non-nil or nil. */
12925 if (EQ (car
, QCeval
) && CONSP (XCDR (elt
)))
12927 /* An element of the form (:eval FORM) means evaluate FORM
12928 and use the result as mode line elements. */
12929 struct gcpro gcpro1
;
12932 spec
= safe_eval (XCAR (XCDR (elt
)));
12934 n
+= display_mode_element (it
, depth
, field_width
- n
,
12935 precision
- n
, spec
);
12938 else if (SYMBOLP (car
))
12940 tem
= Fboundp (car
);
12944 /* elt is now the cdr, and we know it is a cons cell.
12945 Use its car if CAR has a non-nil value. */
12948 tem
= Fsymbol_value (car
);
12955 /* Symbol's value is nil (or symbol is unbound)
12956 Get the cddr of the original list
12957 and if possible find the caddr and use that. */
12961 else if (!CONSP (elt
))
12966 else if (INTEGERP (car
))
12968 register int lim
= XINT (car
);
12972 /* Negative int means reduce maximum width. */
12973 if (precision
<= 0)
12976 precision
= min (precision
, -lim
);
12980 /* Padding specified. Don't let it be more than
12981 current maximum. */
12983 lim
= min (precision
, lim
);
12985 /* If that's more padding than already wanted, queue it.
12986 But don't reduce padding already specified even if
12987 that is beyond the current truncation point. */
12988 field_width
= max (lim
, field_width
);
12992 else if (STRINGP (car
) || CONSP (car
))
12994 register int limit
= 50;
12995 /* Limit is to protect against circular lists. */
12998 && (precision
<= 0 || n
< precision
))
13000 n
+= display_mode_element (it
, depth
, field_width
- n
,
13001 precision
- n
, XCAR (elt
));
13010 if (frame_title_ptr
)
13011 n
+= store_frame_title ("*invalid*", 0, precision
- n
);
13013 n
+= display_string ("*invalid*", Qnil
, Qnil
, 0, 0, it
, 0,
13014 precision
- n
, 0, 0);
13018 /* Pad to FIELD_WIDTH. */
13019 if (field_width
> 0 && n
< field_width
)
13021 if (frame_title_ptr
)
13022 n
+= store_frame_title ("", field_width
- n
, 0);
13024 n
+= display_string ("", Qnil
, Qnil
, 0, 0, it
, field_width
- n
,
13032 /* Write a null-terminated, right justified decimal representation of
13033 the positive integer D to BUF using a minimal field width WIDTH. */
13036 pint2str (buf
, width
, d
)
13037 register char *buf
;
13038 register int width
;
13041 register char *p
= buf
;
13049 *p
++ = d
% 10 + '0';
13054 for (width
-= (int) (p
- buf
); width
> 0; --width
)
13065 /* Set a mnemonic character for coding_system (Lisp symbol) in BUF.
13066 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
13067 type of CODING_SYSTEM. Return updated pointer into BUF. */
13069 static unsigned char invalid_eol_type
[] = "(*invalid*)";
13072 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
13073 Lisp_Object coding_system
;
13074 register char *buf
;
13078 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
13079 unsigned char *eol_str
;
13081 /* The EOL conversion we are using. */
13082 Lisp_Object eoltype
;
13084 val
= Fget (coding_system
, Qcoding_system
);
13087 if (!VECTORP (val
)) /* Not yet decided. */
13092 eoltype
= eol_mnemonic_undecided
;
13093 /* Don't mention EOL conversion if it isn't decided. */
13097 Lisp_Object eolvalue
;
13099 eolvalue
= Fget (coding_system
, Qeol_type
);
13102 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
13106 /* The EOL conversion that is normal on this system. */
13108 if (NILP (eolvalue
)) /* Not yet decided. */
13109 eoltype
= eol_mnemonic_undecided
;
13110 else if (VECTORP (eolvalue
)) /* Not yet decided. */
13111 eoltype
= eol_mnemonic_undecided
;
13112 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
13113 eoltype
= (XFASTINT (eolvalue
) == 0
13114 ? eol_mnemonic_unix
13115 : (XFASTINT (eolvalue
) == 1
13116 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
13122 /* Mention the EOL conversion if it is not the usual one. */
13123 if (STRINGP (eoltype
))
13125 eol_str
= XSTRING (eoltype
)->data
;
13126 eol_str_len
= XSTRING (eoltype
)->size
;
13128 else if (INTEGERP (eoltype
)
13129 && CHAR_VALID_P (XINT (eoltype
), 0))
13131 eol_str
= (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH
);
13132 eol_str_len
= CHAR_STRING (XINT (eoltype
), eol_str
);
13136 eol_str
= invalid_eol_type
;
13137 eol_str_len
= sizeof (invalid_eol_type
) - 1;
13139 bcopy (eol_str
, buf
, eol_str_len
);
13140 buf
+= eol_str_len
;
13146 /* Return a string for the output of a mode line %-spec for window W,
13147 generated by character C. PRECISION >= 0 means don't return a
13148 string longer than that value. FIELD_WIDTH > 0 means pad the
13149 string returned with spaces to that value. */
13151 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
13154 decode_mode_spec (w
, c
, field_width
, precision
)
13157 int field_width
, precision
;
13160 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
13161 char *decode_mode_spec_buf
= f
->decode_mode_spec_buffer
;
13162 struct buffer
*b
= XBUFFER (w
->buffer
);
13169 if (!NILP (b
->read_only
))
13171 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
13176 /* This differs from %* only for a modified read-only buffer. */
13177 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
13179 if (!NILP (b
->read_only
))
13184 /* This differs from %* in ignoring read-only-ness. */
13185 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
13197 if (command_loop_level
> 5)
13199 p
= decode_mode_spec_buf
;
13200 for (i
= 0; i
< command_loop_level
; i
++)
13203 return decode_mode_spec_buf
;
13211 if (command_loop_level
> 5)
13213 p
= decode_mode_spec_buf
;
13214 for (i
= 0; i
< command_loop_level
; i
++)
13217 return decode_mode_spec_buf
;
13224 /* Let lots_of_dashes be a string of infinite length. */
13225 if (field_width
<= 0
13226 || field_width
> sizeof (lots_of_dashes
))
13228 for (i
= 0; i
< FRAME_MESSAGE_BUF_SIZE (f
) - 1; ++i
)
13229 decode_mode_spec_buf
[i
] = '-';
13230 decode_mode_spec_buf
[i
] = '\0';
13231 return decode_mode_spec_buf
;
13234 return lots_of_dashes
;
13243 int col
= current_column ();
13244 XSETFASTINT (w
->column_number_displayed
, col
);
13245 pint2str (decode_mode_spec_buf
, field_width
, col
);
13246 return decode_mode_spec_buf
;
13250 /* %F displays the frame name. */
13251 if (!NILP (f
->title
))
13252 return (char *) XSTRING (f
->title
)->data
;
13253 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
13254 return (char *) XSTRING (f
->name
)->data
;
13263 int startpos
= XMARKER (w
->start
)->charpos
;
13264 int startpos_byte
= marker_byte_position (w
->start
);
13265 int line
, linepos
, linepos_byte
, topline
;
13267 int height
= XFASTINT (w
->height
);
13269 /* If we decided that this buffer isn't suitable for line numbers,
13270 don't forget that too fast. */
13271 if (EQ (w
->base_line_pos
, w
->buffer
))
13273 /* But do forget it, if the window shows a different buffer now. */
13274 else if (BUFFERP (w
->base_line_pos
))
13275 w
->base_line_pos
= Qnil
;
13277 /* If the buffer is very big, don't waste time. */
13278 if (INTEGERP (Vline_number_display_limit
)
13279 && BUF_ZV (b
) - BUF_BEGV (b
) > XINT (Vline_number_display_limit
))
13281 w
->base_line_pos
= Qnil
;
13282 w
->base_line_number
= Qnil
;
13286 if (!NILP (w
->base_line_number
)
13287 && !NILP (w
->base_line_pos
)
13288 && XFASTINT (w
->base_line_pos
) <= startpos
)
13290 line
= XFASTINT (w
->base_line_number
);
13291 linepos
= XFASTINT (w
->base_line_pos
);
13292 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
13297 linepos
= BUF_BEGV (b
);
13298 linepos_byte
= BUF_BEGV_BYTE (b
);
13301 /* Count lines from base line to window start position. */
13302 nlines
= display_count_lines (linepos
, linepos_byte
,
13306 topline
= nlines
+ line
;
13308 /* Determine a new base line, if the old one is too close
13309 or too far away, or if we did not have one.
13310 "Too close" means it's plausible a scroll-down would
13311 go back past it. */
13312 if (startpos
== BUF_BEGV (b
))
13314 XSETFASTINT (w
->base_line_number
, topline
);
13315 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
13317 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
13318 || linepos
== BUF_BEGV (b
))
13320 int limit
= BUF_BEGV (b
);
13321 int limit_byte
= BUF_BEGV_BYTE (b
);
13323 int distance
= (height
* 2 + 30) * line_number_display_limit_width
;
13325 if (startpos
- distance
> limit
)
13327 limit
= startpos
- distance
;
13328 limit_byte
= CHAR_TO_BYTE (limit
);
13331 nlines
= display_count_lines (startpos
, startpos_byte
,
13333 - (height
* 2 + 30),
13335 /* If we couldn't find the lines we wanted within
13336 line_number_display_limit_width chars per line,
13337 give up on line numbers for this window. */
13338 if (position
== limit_byte
&& limit
== startpos
- distance
)
13340 w
->base_line_pos
= w
->buffer
;
13341 w
->base_line_number
= Qnil
;
13345 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
13346 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
13349 /* Now count lines from the start pos to point. */
13350 nlines
= display_count_lines (startpos
, startpos_byte
,
13351 PT_BYTE
, PT
, &junk
);
13353 /* Record that we did display the line number. */
13354 line_number_displayed
= 1;
13356 /* Make the string to show. */
13357 pint2str (decode_mode_spec_buf
, field_width
, topline
+ nlines
);
13358 return decode_mode_spec_buf
;
13361 char* p
= decode_mode_spec_buf
;
13362 int pad
= field_width
- 2;
13368 return decode_mode_spec_buf
;
13374 obj
= b
->mode_name
;
13378 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
13384 int pos
= marker_position (w
->start
);
13385 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
13387 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
13389 if (pos
<= BUF_BEGV (b
))
13394 else if (pos
<= BUF_BEGV (b
))
13398 if (total
> 1000000)
13399 /* Do it differently for a large value, to avoid overflow. */
13400 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
13402 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
13403 /* We can't normally display a 3-digit number,
13404 so get us a 2-digit number that is close. */
13407 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
13408 return decode_mode_spec_buf
;
13412 /* Display percentage of size above the bottom of the screen. */
13415 int toppos
= marker_position (w
->start
);
13416 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
13417 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
13419 if (botpos
>= BUF_ZV (b
))
13421 if (toppos
<= BUF_BEGV (b
))
13428 if (total
> 1000000)
13429 /* Do it differently for a large value, to avoid overflow. */
13430 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
13432 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
13433 /* We can't normally display a 3-digit number,
13434 so get us a 2-digit number that is close. */
13437 if (toppos
<= BUF_BEGV (b
))
13438 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
13440 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
13441 return decode_mode_spec_buf
;
13446 /* status of process */
13447 obj
= Fget_buffer_process (w
->buffer
);
13449 return "no process";
13450 #ifdef subprocesses
13451 obj
= Fsymbol_name (Fprocess_status (obj
));
13455 case 't': /* indicate TEXT or BINARY */
13456 #ifdef MODE_LINE_BINARY_TEXT
13457 return MODE_LINE_BINARY_TEXT (b
);
13463 /* coding-system (not including end-of-line format) */
13465 /* coding-system (including end-of-line type) */
13467 int eol_flag
= (c
== 'Z');
13468 char *p
= decode_mode_spec_buf
;
13470 if (! FRAME_WINDOW_P (f
))
13472 /* No need to mention EOL here--the terminal never needs
13473 to do EOL conversion. */
13474 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
13475 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
13477 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
13480 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
13481 #ifdef subprocesses
13482 obj
= Fget_buffer_process (Fcurrent_buffer ());
13483 if (PROCESSP (obj
))
13485 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
13487 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
13490 #endif /* subprocesses */
13493 return decode_mode_spec_buf
;
13498 return (char *) XSTRING (obj
)->data
;
13504 /* Count up to COUNT lines starting from START / START_BYTE.
13505 But don't go beyond LIMIT_BYTE.
13506 Return the number of lines thus found (always nonnegative).
13508 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
13511 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
13512 int start
, start_byte
, limit_byte
, count
;
13515 register unsigned char *cursor
;
13516 unsigned char *base
;
13518 register int ceiling
;
13519 register unsigned char *ceiling_addr
;
13520 int orig_count
= count
;
13522 /* If we are not in selective display mode,
13523 check only for newlines. */
13524 int selective_display
= (!NILP (current_buffer
->selective_display
)
13525 && !INTEGERP (current_buffer
->selective_display
));
13529 while (start_byte
< limit_byte
)
13531 ceiling
= BUFFER_CEILING_OF (start_byte
);
13532 ceiling
= min (limit_byte
- 1, ceiling
);
13533 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
13534 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
13537 if (selective_display
)
13538 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
13541 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
13544 if (cursor
!= ceiling_addr
)
13548 start_byte
+= cursor
- base
+ 1;
13549 *byte_pos_ptr
= start_byte
;
13553 if (++cursor
== ceiling_addr
)
13559 start_byte
+= cursor
- base
;
13564 while (start_byte
> limit_byte
)
13566 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
13567 ceiling
= max (limit_byte
, ceiling
);
13568 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
13569 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
13572 if (selective_display
)
13573 while (--cursor
!= ceiling_addr
13574 && *cursor
!= '\n' && *cursor
!= 015)
13577 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
13580 if (cursor
!= ceiling_addr
)
13584 start_byte
+= cursor
- base
+ 1;
13585 *byte_pos_ptr
= start_byte
;
13586 /* When scanning backwards, we should
13587 not count the newline posterior to which we stop. */
13588 return - orig_count
- 1;
13594 /* Here we add 1 to compensate for the last decrement
13595 of CURSOR, which took it past the valid range. */
13596 start_byte
+= cursor
- base
+ 1;
13600 *byte_pos_ptr
= limit_byte
;
13603 return - orig_count
+ count
;
13604 return orig_count
- count
;
13610 /***********************************************************************
13612 ***********************************************************************/
13614 /* Display a NUL-terminated string, starting with index START.
13616 If STRING is non-null, display that C string. Otherwise, the Lisp
13617 string LISP_STRING is displayed.
13619 If FACE_STRING is not nil, FACE_STRING_POS is a position in
13620 FACE_STRING. Display STRING or LISP_STRING with the face at
13621 FACE_STRING_POS in FACE_STRING:
13623 Display the string in the environment given by IT, but use the
13624 standard display table, temporarily.
13626 FIELD_WIDTH is the minimum number of output glyphs to produce.
13627 If STRING has fewer characters than FIELD_WIDTH, pad to the right
13628 with spaces. If STRING has more characters, more than FIELD_WIDTH
13629 glyphs will be produced. FIELD_WIDTH <= 0 means don't pad.
13631 PRECISION is the maximum number of characters to output from
13632 STRING. PRECISION < 0 means don't truncate the string.
13634 This is roughly equivalent to printf format specifiers:
13636 FIELD_WIDTH PRECISION PRINTF
13637 ----------------------------------------
13643 MULTIBYTE zero means do not display multibyte chars, > 0 means do
13644 display them, and < 0 means obey the current buffer's value of
13645 enable_multibyte_characters.
13647 Value is the number of glyphs produced. */
13650 display_string (string
, lisp_string
, face_string
, face_string_pos
,
13651 start
, it
, field_width
, precision
, max_x
, multibyte
)
13652 unsigned char *string
;
13653 Lisp_Object lisp_string
;
13654 Lisp_Object face_string
;
13655 int face_string_pos
;
13658 int field_width
, precision
, max_x
;
13661 int hpos_at_start
= it
->hpos
;
13662 int saved_face_id
= it
->face_id
;
13663 struct glyph_row
*row
= it
->glyph_row
;
13665 /* Initialize the iterator IT for iteration over STRING beginning
13666 with index START. We assume that IT may be modified here (which
13667 means that display_line has to do something when displaying a
13668 mini-buffer prompt, which it does). */
13669 reseat_to_string (it
, string
, lisp_string
, start
,
13670 precision
, field_width
, multibyte
);
13672 /* If displaying STRING, set up the face of the iterator
13673 from LISP_STRING, if that's given. */
13674 if (STRINGP (face_string
))
13680 = face_at_string_position (it
->w
, face_string
, face_string_pos
,
13681 0, it
->region_beg_charpos
,
13682 it
->region_end_charpos
,
13683 &endptr
, it
->base_face_id
);
13684 face
= FACE_FROM_ID (it
->f
, it
->face_id
);
13685 it
->face_box_p
= face
->box
!= FACE_NO_BOX
;
13688 /* Set max_x to the maximum allowed X position. Don't let it go
13689 beyond the right edge of the window. */
13691 max_x
= it
->last_visible_x
;
13693 max_x
= min (max_x
, it
->last_visible_x
);
13695 /* Skip over display elements that are not visible. because IT->w is
13697 if (it
->current_x
< it
->first_visible_x
)
13698 move_it_in_display_line_to (it
, 100000, it
->first_visible_x
,
13699 MOVE_TO_POS
| MOVE_TO_X
);
13701 row
->ascent
= it
->max_ascent
;
13702 row
->height
= it
->max_ascent
+ it
->max_descent
;
13703 row
->phys_ascent
= it
->max_phys_ascent
;
13704 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
13706 /* This condition is for the case that we are called with current_x
13707 past last_visible_x. */
13708 while (it
->current_x
< max_x
)
13710 int x_before
, x
, n_glyphs_before
, i
, nglyphs
;
13712 /* Get the next display element. */
13713 if (!get_next_display_element (it
))
13716 /* Produce glyphs. */
13717 x_before
= it
->current_x
;
13718 n_glyphs_before
= it
->glyph_row
->used
[TEXT_AREA
];
13719 PRODUCE_GLYPHS (it
);
13721 nglyphs
= it
->glyph_row
->used
[TEXT_AREA
] - n_glyphs_before
;
13724 while (i
< nglyphs
)
13726 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
13728 if (!it
->truncate_lines_p
13729 && x
+ glyph
->pixel_width
> max_x
)
13731 /* End of continued line or max_x reached. */
13732 if (CHAR_GLYPH_PADDING_P (*glyph
))
13734 /* A wide character is unbreakable. */
13735 it
->glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
;
13736 it
->current_x
= x_before
;
13740 it
->glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
13745 else if (x
+ glyph
->pixel_width
> it
->first_visible_x
)
13747 /* Glyph is at least partially visible. */
13749 if (x
< it
->first_visible_x
)
13750 it
->glyph_row
->x
= x
- it
->first_visible_x
;
13754 /* Glyph is off the left margin of the display area.
13755 Should not happen. */
13759 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
13760 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
13761 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
13762 row
->phys_height
= max (row
->phys_height
,
13763 it
->max_phys_ascent
+ it
->max_phys_descent
);
13764 x
+= glyph
->pixel_width
;
13768 /* Stop if max_x reached. */
13772 /* Stop at line ends. */
13773 if (ITERATOR_AT_END_OF_LINE_P (it
))
13775 it
->continuation_lines_width
= 0;
13779 set_iterator_to_next (it
, 1);
13781 /* Stop if truncating at the right edge. */
13782 if (it
->truncate_lines_p
13783 && it
->current_x
>= it
->last_visible_x
)
13785 /* Add truncation mark, but don't do it if the line is
13786 truncated at a padding space. */
13787 if (IT_CHARPOS (*it
) < it
->string_nchars
)
13789 if (!FRAME_WINDOW_P (it
->f
))
13793 if (it
->current_x
> it
->last_visible_x
)
13795 for (i
= row
->used
[TEXT_AREA
] - 1; i
> 0; --i
)
13796 if (!CHAR_GLYPH_PADDING_P (row
->glyphs
[TEXT_AREA
][i
]))
13798 for (n
= row
->used
[TEXT_AREA
]; i
< n
; ++i
)
13800 row
->used
[TEXT_AREA
] = i
;
13801 produce_special_glyphs (it
, IT_TRUNCATION
);
13804 produce_special_glyphs (it
, IT_TRUNCATION
);
13806 it
->glyph_row
->truncated_on_right_p
= 1;
13812 /* Maybe insert a truncation at the left. */
13813 if (it
->first_visible_x
13814 && IT_CHARPOS (*it
) > 0)
13816 if (!FRAME_WINDOW_P (it
->f
))
13817 insert_left_trunc_glyphs (it
);
13818 it
->glyph_row
->truncated_on_left_p
= 1;
13821 it
->face_id
= saved_face_id
;
13823 /* Value is number of columns displayed. */
13824 return it
->hpos
- hpos_at_start
;
13829 /* This is like a combination of memq and assq. Return 1 if PROPVAL
13830 appears as an element of LIST or as the car of an element of LIST.
13831 If PROPVAL is a list, compare each element against LIST in that
13832 way, and return 1 if any element of PROPVAL is found in LIST.
13833 Otherwise return 0. This function cannot quit. */
13836 invisible_p (propval
, list
)
13837 register Lisp_Object propval
;
13840 register Lisp_Object tail
, proptail
;
13842 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
13844 register Lisp_Object tem
;
13846 if (EQ (propval
, tem
))
13848 if (CONSP (tem
) && EQ (propval
, XCAR (tem
)))
13852 if (CONSP (propval
))
13854 for (proptail
= propval
; CONSP (proptail
); proptail
= XCDR (proptail
))
13856 Lisp_Object propelt
;
13857 propelt
= XCAR (proptail
);
13858 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
13860 register Lisp_Object tem
;
13862 if (EQ (propelt
, tem
))
13864 if (CONSP (tem
) && EQ (propelt
, XCAR (tem
)))
13874 /* Return 1 if PROPVAL appears as the car of an element of LIST and
13875 the cdr of that element is non-nil. If PROPVAL is a list, check
13876 each element of PROPVAL in that way, and the first time some
13877 element is found, return 1 if the cdr of that element is non-nil.
13878 Otherwise return 0. This function cannot quit. */
13881 invisible_ellipsis_p (propval
, list
)
13882 register Lisp_Object propval
;
13885 register Lisp_Object tail
, proptail
;
13887 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
13889 register Lisp_Object tem
;
13891 if (CONSP (tem
) && EQ (propval
, XCAR (tem
)))
13892 return ! NILP (XCDR (tem
));
13895 if (CONSP (propval
))
13896 for (proptail
= propval
; CONSP (proptail
); proptail
= XCDR (proptail
))
13898 Lisp_Object propelt
;
13899 propelt
= XCAR (proptail
);
13900 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
13902 register Lisp_Object tem
;
13904 if (CONSP (tem
) && EQ (propelt
, XCAR (tem
)))
13905 return ! NILP (XCDR (tem
));
13914 /***********************************************************************
13916 ***********************************************************************/
13921 Vwith_echo_area_save_vector
= Qnil
;
13922 staticpro (&Vwith_echo_area_save_vector
);
13924 Vmessage_stack
= Qnil
;
13925 staticpro (&Vmessage_stack
);
13927 Qinhibit_redisplay
= intern ("inhibit-redisplay");
13928 staticpro (&Qinhibit_redisplay
);
13931 defsubr (&Sdump_glyph_matrix
);
13932 defsubr (&Sdump_glyph_row
);
13933 defsubr (&Sdump_tool_bar_row
);
13934 defsubr (&Strace_redisplay_toggle
);
13935 defsubr (&Strace_to_stderr
);
13938 staticpro (&Qmenu_bar_update_hook
);
13939 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
13941 staticpro (&Qoverriding_terminal_local_map
);
13942 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
13944 staticpro (&Qoverriding_local_map
);
13945 Qoverriding_local_map
= intern ("overriding-local-map");
13947 staticpro (&Qwindow_scroll_functions
);
13948 Qwindow_scroll_functions
= intern ("window-scroll-functions");
13950 staticpro (&Qredisplay_end_trigger_functions
);
13951 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
13953 staticpro (&Qinhibit_point_motion_hooks
);
13954 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
13956 QCdata
= intern (":data");
13957 staticpro (&QCdata
);
13958 Qdisplay
= intern ("display");
13959 staticpro (&Qdisplay
);
13960 Qspace_width
= intern ("space-width");
13961 staticpro (&Qspace_width
);
13962 Qraise
= intern ("raise");
13963 staticpro (&Qraise
);
13964 Qspace
= intern ("space");
13965 staticpro (&Qspace
);
13966 Qmargin
= intern ("margin");
13967 staticpro (&Qmargin
);
13968 Qleft_margin
= intern ("left-margin");
13969 staticpro (&Qleft_margin
);
13970 Qright_margin
= intern ("right-margin");
13971 staticpro (&Qright_margin
);
13972 Qalign_to
= intern ("align-to");
13973 staticpro (&Qalign_to
);
13974 QCalign_to
= intern (":align-to");
13975 staticpro (&QCalign_to
);
13976 Qrelative_width
= intern ("relative-width");
13977 staticpro (&Qrelative_width
);
13978 QCrelative_width
= intern (":relative-width");
13979 staticpro (&QCrelative_width
);
13980 QCrelative_height
= intern (":relative-height");
13981 staticpro (&QCrelative_height
);
13982 QCeval
= intern (":eval");
13983 staticpro (&QCeval
);
13984 Qwhen
= intern ("when");
13985 staticpro (&Qwhen
);
13986 QCfile
= intern (":file");
13987 staticpro (&QCfile
);
13988 Qfontified
= intern ("fontified");
13989 staticpro (&Qfontified
);
13990 Qfontification_functions
= intern ("fontification-functions");
13991 staticpro (&Qfontification_functions
);
13992 Qtrailing_whitespace
= intern ("trailing-whitespace");
13993 staticpro (&Qtrailing_whitespace
);
13994 Qimage
= intern ("image");
13995 staticpro (&Qimage
);
13996 Qmessage_truncate_lines
= intern ("message-truncate-lines");
13997 staticpro (&Qmessage_truncate_lines
);
13998 Qgrow_only
= intern ("grow-only");
13999 staticpro (&Qgrow_only
);
14001 last_arrow_position
= Qnil
;
14002 last_arrow_string
= Qnil
;
14003 staticpro (&last_arrow_position
);
14004 staticpro (&last_arrow_string
);
14006 echo_buffer
[0] = echo_buffer
[1] = Qnil
;
14007 staticpro (&echo_buffer
[0]);
14008 staticpro (&echo_buffer
[1]);
14010 echo_area_buffer
[0] = echo_area_buffer
[1] = Qnil
;
14011 staticpro (&echo_area_buffer
[0]);
14012 staticpro (&echo_area_buffer
[1]);
14014 Vmessages_buffer_name
= build_string ("*Messages*");
14015 staticpro (&Vmessages_buffer_name
);
14017 DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace
,
14018 "Non-nil means highlight trailing whitespace.\n\
14019 The face used for trailing whitespace is `trailing-whitespace'.");
14020 Vshow_trailing_whitespace
= Qnil
;
14022 DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay
,
14023 "Non-nil means don't actually do any redisplay.\n\
14024 This is used for internal purposes.");
14025 Vinhibit_redisplay
= Qnil
;
14027 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
14028 "String (or mode line construct) included (normally) in `mode-line-format'.");
14029 Vglobal_mode_string
= Qnil
;
14031 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
14032 "Marker for where to display an arrow on top of the buffer text.\n\
14033 This must be the beginning of a line in order to work.\n\
14034 See also `overlay-arrow-string'.");
14035 Voverlay_arrow_position
= Qnil
;
14037 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
14038 "String to display as an arrow. See also `overlay-arrow-position'.");
14039 Voverlay_arrow_string
= Qnil
;
14041 DEFVAR_INT ("scroll-step", &scroll_step
,
14042 "*The number of lines to try scrolling a window by when point moves out.\n\
14043 If that fails to bring point back on frame, point is centered instead.\n\
14044 If this is zero, point is always centered after it moves off frame.\n\
14045 If you want scrolling to always be a line at a time, you should set\n\
14046 `scroll-conservatively' to a large value rather than set this to 1.");
14048 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
14049 "*Scroll up to this many lines, to bring point back on screen.\n\
14050 A value of zero means to scroll the text to center point vertically\n\
14052 scroll_conservatively
= 0;
14054 DEFVAR_INT ("scroll-margin", &scroll_margin
,
14055 "*Number of lines of margin at the top and bottom of a window.\n\
14056 Recenter the window whenever point gets within this many lines\n\
14057 of the top or bottom of the window.");
14061 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
14064 DEFVAR_BOOL ("truncate-partial-width-windows",
14065 &truncate_partial_width_windows
,
14066 "*Non-nil means truncate lines in all windows less than full frame wide.");
14067 truncate_partial_width_windows
= 1;
14069 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
14070 "nil means display the mode-line/header-line/menu-bar in the default face.\n\
14071 Any other value means to use the appropriate face, `mode-line',\n\
14072 `header-line', or `menu' respectively.\n\
14074 This variable is deprecated; please change the above faces instead.");
14075 mode_line_inverse_video
= 1;
14077 DEFVAR_LISP ("line-number-display-limit", &Vline_number_display_limit
,
14078 "*Maximum buffer size for which line number should be displayed.\n\
14079 If the buffer is bigger than this, the line number does not appear\n\
14080 in the mode line. A value of nil means no limit.");
14081 Vline_number_display_limit
= Qnil
;
14083 DEFVAR_INT ("line-number-display-limit-width",
14084 &line_number_display_limit_width
,
14085 "*Maximum line width (in characters) for line number display.\n\
14086 If the average length of the lines near point is bigger than this, then the\n\
14087 line number may be omitted from the mode line.");
14088 line_number_display_limit_width
= 200;
14090 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
14091 "*Non-nil means highlight region even in nonselected windows.");
14092 highlight_nonselected_windows
= 0;
14094 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
14095 "Non-nil if more than one frame is visible on this display.\n\
14096 Minibuffer-only frames don't count, but iconified frames do.\n\
14097 This variable is not guaranteed to be accurate except while processing\n\
14098 `frame-title-format' and `icon-title-format'.");
14100 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
14101 "Template for displaying the title bar of visible frames.\n\
14102 \(Assuming the window manager supports this feature.)\n\
14103 This variable has the same structure as `mode-line-format' (which see),\n\
14104 and is used only on frames for which no explicit name has been set\n\
14105 \(see `modify-frame-parameters').");
14106 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
14107 "Template for displaying the title bar of an iconified frame.\n\
14108 \(Assuming the window manager supports this feature.)\n\
14109 This variable has the same structure as `mode-line-format' (which see),\n\
14110 and is used only on frames for which no explicit name has been set\n\
14111 \(see `modify-frame-parameters').");
14113 = Vframe_title_format
14114 = Fcons (intern ("multiple-frames"),
14115 Fcons (build_string ("%b"),
14116 Fcons (Fcons (build_string (""),
14117 Fcons (intern ("invocation-name"),
14118 Fcons (build_string ("@"),
14119 Fcons (intern ("system-name"),
14123 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
14124 "Maximum number of lines to keep in the message log buffer.\n\
14125 If nil, disable message logging. If t, log messages but don't truncate\n\
14126 the buffer when it becomes large.");
14127 XSETFASTINT (Vmessage_log_max
, 50);
14129 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
14130 "Functions called before redisplay, if window sizes have changed.\n\
14131 The value should be a list of functions that take one argument.\n\
14132 Just before redisplay, for each frame, if any of its windows have changed\n\
14133 size since the last redisplay, or have been split or deleted,\n\
14134 all the functions in the list are called, with the frame as argument.");
14135 Vwindow_size_change_functions
= Qnil
;
14137 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
14138 "List of Functions to call before redisplaying a window with scrolling.\n\
14139 Each function is called with two arguments, the window\n\
14140 and its new display-start position. Note that the value of `window-end'\n\
14141 is not valid when these functions are called.");
14142 Vwindow_scroll_functions
= Qnil
;
14144 DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p
,
14145 "*Non-nil means automatically resize tool-bars.\n\
14146 This increases a tool-bar's height if not all tool-bar items are visible.\n\
14147 It decreases a tool-bar's height when it would display blank lines\n\
14149 auto_resize_tool_bars_p
= 1;
14151 DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p
,
14152 "*Non-nil means raise tool-bar buttons when the mouse moves over them.");
14153 auto_raise_tool_bar_buttons_p
= 1;
14155 DEFVAR_LISP ("tool-bar-button-margin", &Vtool_bar_button_margin
,
14156 "*Margin around tool-bar buttons in pixels.\n\
14157 If an integer, use that for both horizontal and vertical margins.\n\
14158 Otherwise, value should be a pair of integers `(HORZ : VERT)' with\n\
14159 HORZ specifying the horizontal margin, and VERT specifying the\n\
14160 vertical margin.");
14161 Vtool_bar_button_margin
= make_number (1);
14163 DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief
,
14164 "Relief thickness of tool-bar buttons.");
14165 tool_bar_button_relief
= 3;
14167 DEFVAR_LISP ("fontification-functions", &Vfontification_functions
,
14168 "List of functions to call to fontify regions of text.\n\
14169 Each function is called with one argument POS. Functions must\n\
14170 fontify a region starting at POS in the current buffer, and give\n\
14171 fontified regions the property `fontified'.\n\
14172 This variable automatically becomes buffer-local when set.");
14173 Vfontification_functions
= Qnil
;
14174 Fmake_variable_buffer_local (Qfontification_functions
);
14176 DEFVAR_BOOL ("unibyte-display-via-language-environment",
14177 &unibyte_display_via_language_environment
,
14178 "*Non-nil means display unibyte text according to language environment.\n\
14179 Specifically this means that unibyte non-ASCII characters\n\
14180 are displayed by converting them to the equivalent multibyte characters\n\
14181 according to the current language environment. As a result, they are\n\
14182 displayed according to the current fontset.");
14183 unibyte_display_via_language_environment
= 0;
14185 DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height
,
14186 "*Maximum height for resizing mini-windows.\n\
14187 If a float, it specifies a fraction of the mini-window frame's height.\n\
14188 If an integer, it specifies a number of lines.");
14189 Vmax_mini_window_height
= make_float (0.25);
14191 DEFVAR_LISP ("resize-mini-windows", &Vresize_mini_windows
,
14192 "*How to resize mini-windows.\n\
14193 A value of nil means don't automatically resize mini-windows.\n\
14194 A value of t means resize them to fit the text displayed in them.\n\
14195 A value of `grow-only', the default, means let mini-windows grow\n\
14196 only, until their display becomes empty, at which point the windows\n\
14197 go back to their normal size.");
14198 Vresize_mini_windows
= Qgrow_only
;
14200 DEFVAR_BOOL ("cursor-in-non-selected-windows",
14201 &cursor_in_non_selected_windows
,
14202 "*Non-nil means display a hollow cursor in non-selected windows.\n\
14203 Nil means don't display a cursor there.");
14204 cursor_in_non_selected_windows
= 1;
14206 DEFVAR_BOOL ("automatic-hscrolling", &automatic_hscrolling_p
,
14207 "*Non-nil means scroll the display automatically to make point visible.");
14208 automatic_hscrolling_p
= 1;
14210 DEFVAR_LISP ("image-types", &Vimage_types
,
14211 "List of supported image types.\n\
14212 Each element of the list is a symbol for a supported image type.");
14213 Vimage_types
= Qnil
;
14215 DEFVAR_BOOL ("message-truncate-lines", &message_truncate_lines
,
14216 "If non-nil, messages are truncated instead of resizing the echo area.\n\
14217 Bind this around calls to `message' to let it take effect.");
14218 message_truncate_lines
= 0;
14220 DEFVAR_LISP ("menu-bar-update-hook", &Vmenu_bar_update_hook
,
14221 "Normal hook run for clicks on menu bar, before displaying a submenu.\n\
14222 Can be used to update submenus whose contents should vary.");
14223 Vmenu_bar_update_hook
= Qnil
;
14227 /* Initialize this module when Emacs starts. */
14232 Lisp_Object root_window
;
14233 struct window
*mini_w
;
14235 current_header_line_height
= current_mode_line_height
= -1;
14237 CHARPOS (this_line_start_pos
) = 0;
14239 mini_w
= XWINDOW (minibuf_window
);
14240 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
14242 if (!noninteractive
)
14244 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
14247 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_TOP_MARGIN (f
));
14248 set_window_height (root_window
,
14249 FRAME_HEIGHT (f
) - 1 - FRAME_TOP_MARGIN (f
),
14251 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
14252 set_window_height (minibuf_window
, 1, 0);
14254 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
14255 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));
14257 scratch_glyph_row
.glyphs
[TEXT_AREA
] = scratch_glyphs
;
14258 scratch_glyph_row
.glyphs
[TEXT_AREA
+ 1]
14259 = scratch_glyphs
+ MAX_SCRATCH_GLYPHS
;
14261 /* The default ellipsis glyphs `...'. */
14262 for (i
= 0; i
< 3; ++i
)
14263 XSETFASTINT (default_invis_vector
[i
], '.');
14266 #ifdef HAVE_WINDOW_SYSTEM
14268 /* Allocate the buffer for frame titles. */
14270 frame_title_buf
= (char *) xmalloc (size
);
14271 frame_title_buf_end
= frame_title_buf
+ size
;
14272 frame_title_ptr
= NULL
;
14274 #endif /* HAVE_WINDOW_SYSTEM */
14276 help_echo_showing_p
= 0;