1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 99
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. */
178 #include "termchar.h"
179 #include "dispextern.h"
183 #include "commands.h"
186 #include "termhooks.h"
187 #include "intervals.h"
188 #include "keyboard.h"
191 #include "region-cache.h"
193 #ifdef HAVE_X_WINDOWS
197 #define min(a, b) ((a) < (b) ? (a) : (b))
198 #define max(a, b) ((a) > (b) ? (a) : (b))
200 #define INFINITY 10000000
202 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
203 extern void set_frame_menubar ();
204 extern int pending_menu_activation
;
207 extern int interrupt_input
;
208 extern int command_loop_level
;
210 extern int minibuffer_auto_raise
;
212 extern Lisp_Object Qface
;
214 extern Lisp_Object Voverriding_local_map
;
215 extern Lisp_Object Voverriding_local_map_menu_flag
;
216 extern Lisp_Object Qmenu_item
;
218 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
219 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
220 Lisp_Object Qredisplay_end_trigger_functions
;
221 Lisp_Object Qinhibit_point_motion_hooks
;
222 Lisp_Object QCeval
, QCwhen
;
223 Lisp_Object Qfontified
;
225 /* Functions called to fontify regions of text. */
227 Lisp_Object Vfontification_functions
;
228 Lisp_Object Qfontification_functions
;
230 /* Non-zero means draw tool bar buttons raised when the mouse moves
233 int auto_raise_tool_bar_buttons_p
;
235 /* Margin around tool bar buttons in pixels. */
237 int tool_bar_button_margin
;
239 /* Thickness of shadow to draw around tool bar buttons. */
241 int tool_bar_button_relief
;
243 /* Non-zero means automatically resize tool-bars so that all tool-bar
244 items are visible, and no blank lines remain. */
246 int auto_resize_tool_bars_p
;
248 /* Non-nil means don't actually do any redisplay. */
250 Lisp_Object Vinhibit_redisplay
, Qinhibit_redisplay
;
252 /* Names of text properties relevant for redisplay. */
254 Lisp_Object Qdisplay
, Qrelative_width
, Qwidth
, Qalign_to
;
255 extern Lisp_Object Qface
, Qinvisible
, Qimage
;
257 /* Symbols used in text property values. */
259 Lisp_Object Qspace
, QCalign_to
, QCrelative_width
, QCrelative_height
;
260 Lisp_Object Qleft_margin
, Qright_margin
, Qspace_width
, Qheight
, Qraise
;
262 /* Non-nil means highlight trailing whitespace. */
264 Lisp_Object Vshow_trailing_whitespace
;
266 /* Name of the face used to highlight trailing whitespace. */
268 Lisp_Object Qtrailing_whitespace
;
270 /* The symbol `image' which is the car of the lists used to represent
275 /* Non-zero means print newline to stdout before next mini-buffer
278 int noninteractive_need_newline
;
280 /* Non-zero means print newline to message log before next message. */
282 static int message_log_need_newline
;
285 /* The buffer position of the first character appearing entirely or
286 partially on the line of the selected window which contains the
287 cursor; <= 0 if not known. Set by set_cursor_from_row, used for
288 redisplay optimization in redisplay_internal. */
290 static struct text_pos this_line_start_pos
;
292 /* Number of characters past the end of the line above, including the
293 terminating newline. */
295 static struct text_pos this_line_end_pos
;
297 /* The vertical positions and the height of this line. */
299 static int this_line_vpos
;
300 static int this_line_y
;
301 static int this_line_pixel_height
;
303 /* X position at which this display line starts. Usually zero;
304 negative if first character is partially visible. */
306 static int this_line_start_x
;
308 /* Buffer that this_line_.* variables are referring to. */
310 static struct buffer
*this_line_buffer
;
312 /* Nonzero means truncate lines in all windows less wide than the
315 int truncate_partial_width_windows
;
317 /* A flag to control how to display unibyte 8-bit character. */
319 int unibyte_display_via_language_environment
;
321 /* Nonzero means we have more than one non-mini-buffer-only frame.
322 Not guaranteed to be accurate except while parsing
323 frame-title-format. */
327 Lisp_Object Vglobal_mode_string
;
329 /* Marker for where to display an arrow on top of the buffer text. */
331 Lisp_Object Voverlay_arrow_position
;
333 /* String to display for the arrow. Only used on terminal frames. */
335 Lisp_Object Voverlay_arrow_string
;
337 /* Values of those variables at last redisplay. However, if
338 Voverlay_arrow_position is a marker, last_arrow_position is its
339 numerical position. */
341 static Lisp_Object last_arrow_position
, last_arrow_string
;
343 /* Like mode-line-format, but for the title bar on a visible frame. */
345 Lisp_Object Vframe_title_format
;
347 /* Like mode-line-format, but for the title bar on an iconified frame. */
349 Lisp_Object Vicon_title_format
;
351 /* List of functions to call when a window's size changes. These
352 functions get one arg, a frame on which one or more windows' sizes
355 static Lisp_Object Vwindow_size_change_functions
;
357 Lisp_Object Qmenu_bar_update_hook
;
359 /* Nonzero if overlay arrow has been displayed once in this window. */
361 static int overlay_arrow_seen
;
363 /* Nonzero means highlight the region even in nonselected windows. */
365 int highlight_nonselected_windows
;
367 /* If cursor motion alone moves point off frame, try scrolling this
368 many lines up or down if that will bring it back. */
370 static int scroll_step
;
372 /* Non-0 means scroll just far enough to bring point back on the
373 screen, when appropriate. */
375 static int scroll_conservatively
;
377 /* Recenter the window whenever point gets within this many lines of
378 the top or bottom of the window. This value is translated into a
379 pixel value by multiplying it with CANON_Y_UNIT, which means that
380 there is really a fixed pixel height scroll margin. */
384 /* Number of windows showing the buffer of the selected window (or
385 another buffer with the same base buffer). keyboard.c refers to
390 /* Vector containing glyphs for an ellipsis `...'. */
392 static Lisp_Object default_invis_vector
[3];
394 /* Nonzero means display mode line highlighted. */
396 int mode_line_inverse_video
;
398 /* Prompt to display in front of the mini-buffer contents. */
400 Lisp_Object minibuf_prompt
;
402 /* Width of current mini-buffer prompt. Only set after display_line
403 of the line that contains the prompt. */
405 int minibuf_prompt_width
;
406 int minibuf_prompt_pixel_width
;
408 /* This is the window where the echo area message was displayed. It
409 is always a mini-buffer window, but it may not be the same window
410 currently active as a mini-buffer. */
412 Lisp_Object echo_area_window
;
414 /* List of pairs (MESSAGE . MULTIBYTE). The function save_message
415 pushes the current message and the value of
416 message_enable_multibyte on the stack, the function restore_message
417 pops the stack and displays MESSAGE again. */
419 Lisp_Object Vmessage_stack
;
421 /* Nonzero means multibyte characters were enabled when the echo area
422 message was specified. */
424 int message_enable_multibyte
;
426 /* True if we should redraw the mode lines on the next redisplay. */
428 int update_mode_lines
;
430 /* Nonzero if window sizes or contents have changed since last
431 redisplay that finished */
433 int windows_or_buffers_changed
;
435 /* Nonzero after display_mode_line if %l was used and it displayed a
438 int line_number_displayed
;
440 /* Maximum buffer size for which to display line numbers. */
442 static int line_number_display_limit
;
444 /* line width to consider when repostioning for line number display */
446 static int line_number_display_limit_width
;
448 /* Number of lines to keep in the message log buffer. t means
449 infinite. nil means don't log at all. */
451 Lisp_Object Vmessage_log_max
;
453 /* Current, index 0, and last displayed echo area message. Either
454 buffers from echo_buffers, or nil to indicate no message. */
456 Lisp_Object echo_area_buffer
[2];
458 /* The buffers referenced from echo_area_buffer. */
460 static Lisp_Object echo_buffer
[2];
462 /* A vector saved used in with_area_buffer to reduce consing. */
464 static Lisp_Object Vwith_echo_area_save_vector
;
466 /* Non-zero means display_echo_area should display the last echo area
467 message again. Set by redisplay_preserve_echo_area. */
469 static int display_last_displayed_message_p
;
471 /* Nonzero if echo area is being used by print; zero if being used by
474 int message_buf_print
;
476 /* Maximum height for resizing mini-windows. Either a float
477 specifying a fraction of the available height, or an integer
478 specifying a number of lines. */
480 static Lisp_Object Vmax_mini_window_height
;
482 /* A scratch glyph row with contents used for generating truncation
483 glyphs. Also used in direct_output_for_insert. */
485 #define MAX_SCRATCH_GLYPHS 100
486 struct glyph_row scratch_glyph_row
;
487 static struct glyph scratch_glyphs
[MAX_SCRATCH_GLYPHS
];
489 /* Ascent and height of the last line processed by move_it_to. */
491 static int last_max_ascent
, last_height
;
493 /* The maximum distance to look ahead for text properties. Values
494 that are too small let us call compute_char_face and similar
495 functions too often which is expensive. Values that are too large
496 let us call compute_char_face and alike too often because we
497 might not be interested in text properties that far away. */
499 #define TEXT_PROP_DISTANCE_LIMIT 100
501 /* Non-zero means print traces of redisplay if compiled with
505 int trace_redisplay_p
;
508 /* Value returned from text property handlers (see below). */
513 HANDLED_RECOMPUTE_PROPS
,
514 HANDLED_OVERLAY_STRING_CONSUMED
,
518 /* A description of text properties that redisplay is interested
523 /* The name of the property. */
526 /* A unique index for the property. */
529 /* A handler function called to set up iterator IT from the property
530 at IT's current position. Value is used to steer handle_stop. */
531 enum prop_handled (*handler
) P_ ((struct it
*it
));
534 static enum prop_handled handle_face_prop
P_ ((struct it
*));
535 static enum prop_handled handle_invisible_prop
P_ ((struct it
*));
536 static enum prop_handled handle_display_prop
P_ ((struct it
*));
537 static enum prop_handled handle_overlay_change
P_ ((struct it
*));
538 static enum prop_handled handle_fontified_prop
P_ ((struct it
*));
540 /* Properties handled by iterators. */
542 static struct props it_props
[] =
544 {&Qfontified
, FONTIFIED_PROP_IDX
, handle_fontified_prop
},
545 /* Handle `face' before `display' because some sub-properties of
546 `display' need to know the face. */
547 {&Qface
, FACE_PROP_IDX
, handle_face_prop
},
548 {&Qdisplay
, DISPLAY_PROP_IDX
, handle_display_prop
},
549 {&Qinvisible
, INVISIBLE_PROP_IDX
, handle_invisible_prop
},
553 /* Value is the position described by X. If X is a marker, value is
554 the marker_position of X. Otherwise, value is X. */
556 #define COERCE_MARKER(X) (MARKERP ((X)) ? Fmarker_position (X) : (X))
558 /* Enumeration returned by some move_it_.* functions internally. */
562 /* Not used. Undefined value. */
565 /* Move ended at the requested buffer position or ZV. */
566 MOVE_POS_MATCH_OR_ZV
,
568 /* Move ended at the requested X pixel position. */
571 /* Move within a line ended at the end of a line that must be
575 /* Move within a line ended at the end of a line that would
576 be displayed truncated. */
579 /* Move within a line ended at a line end. */
585 /* Function prototypes. */
587 static struct glyph_row
*row_containing_pos
P_ ((struct window
*, int,
589 struct glyph_row
*));
590 static Lisp_Object unwind_with_echo_area_buffer
P_ ((Lisp_Object
));
591 static Lisp_Object with_echo_area_buffer_unwind_data
P_ ((struct window
*));
592 static void clear_garbaged_frames
P_ ((void));
593 static int current_message_1
P_ ((Lisp_Object
*));
594 static int truncate_message_1
P_ ((int));
595 static int set_message_1
P_ ((char *s
, Lisp_Object
, int, int));
596 static int display_echo_area
P_ ((struct window
*));
597 static int display_echo_area_1
P_ ((struct window
*));
598 static Lisp_Object unwind_redisplay
P_ ((Lisp_Object
));
599 static int string_char_and_length
P_ ((unsigned char *, int, int *));
600 static struct text_pos display_prop_end
P_ ((struct it
*, Lisp_Object
,
602 static int compute_window_start_on_continuation_line
P_ ((struct window
*));
603 static Lisp_Object eval_handler
P_ ((Lisp_Object
));
604 static Lisp_Object eval_form
P_ ((Lisp_Object
));
605 static void insert_left_trunc_glyphs
P_ ((struct it
*));
606 static struct glyph_row
*get_overlay_arrow_glyph_row
P_ ((struct window
*));
607 static void extend_face_to_end_of_line
P_ ((struct it
*));
608 static void append_space
P_ ((struct it
*, int));
609 static void make_cursor_line_fully_visible
P_ ((struct window
*));
610 static int try_scrolling
P_ ((Lisp_Object
, int, int, int, int));
611 static int trailing_whitespace_p
P_ ((int));
612 static int message_log_check_duplicate
P_ ((int, int, int, int));
613 int invisible_p
P_ ((Lisp_Object
, Lisp_Object
));
614 int invisible_ellipsis_p
P_ ((Lisp_Object
, Lisp_Object
));
615 static void push_it
P_ ((struct it
*));
616 static void pop_it
P_ ((struct it
*));
617 static void sync_frame_with_window_matrix_rows
P_ ((struct window
*));
618 static void redisplay_internal
P_ ((int));
619 static int echo_area_display
P_ ((int));
620 static void redisplay_windows
P_ ((Lisp_Object
));
621 static void redisplay_window
P_ ((Lisp_Object
, int));
622 static void update_menu_bar
P_ ((struct frame
*, int));
623 static int try_window_reusing_current_matrix
P_ ((struct window
*));
624 static int try_window_id
P_ ((struct window
*));
625 static int display_line
P_ ((struct it
*));
626 static void display_mode_lines
P_ ((struct window
*));
627 static void display_mode_line
P_ ((struct window
*, enum face_id
,
629 static int display_mode_element
P_ ((struct it
*, int, int, int, Lisp_Object
));
630 static char *decode_mode_spec
P_ ((struct window
*, char, int, int));
631 static void display_menu_bar
P_ ((struct window
*));
632 static int display_count_lines
P_ ((int, int, int, int, int *));
633 static int display_string
P_ ((unsigned char *, Lisp_Object
, Lisp_Object
,
634 int, int, struct it
*, int, int, int, int));
635 static void compute_line_metrics
P_ ((struct it
*));
636 static void run_redisplay_end_trigger_hook
P_ ((struct it
*));
637 static int get_overlay_strings
P_ ((struct it
*));
638 static void next_overlay_string
P_ ((struct it
*));
639 void set_iterator_to_next
P_ ((struct it
*));
640 static void reseat
P_ ((struct it
*, struct text_pos
, int));
641 static void reseat_1
P_ ((struct it
*, struct text_pos
, int));
642 static void back_to_previous_visible_line_start
P_ ((struct it
*));
643 static void reseat_at_previous_visible_line_start
P_ ((struct it
*));
644 static void reseat_at_next_visible_line_start
P_ ((struct it
*, int));
645 static int next_element_from_display_vector
P_ ((struct it
*));
646 static int next_element_from_string
P_ ((struct it
*));
647 static int next_element_from_c_string
P_ ((struct it
*));
648 static int next_element_from_buffer
P_ ((struct it
*));
649 static int next_element_from_image
P_ ((struct it
*));
650 static int next_element_from_stretch
P_ ((struct it
*));
651 static void load_overlay_strings
P_ ((struct it
*));
652 static void init_from_display_pos
P_ ((struct it
*, struct window
*,
653 struct display_pos
*));
654 static void reseat_to_string
P_ ((struct it
*, unsigned char *,
655 Lisp_Object
, int, int, int, int));
656 static int charset_at_position
P_ ((struct text_pos
));
657 static enum move_it_result move_it_in_display_line_to
P_ ((struct it
*,
659 void move_it_vertically_backward
P_ ((struct it
*, int));
660 static void init_to_row_start
P_ ((struct it
*, struct window
*,
661 struct glyph_row
*));
662 static void init_to_row_end
P_ ((struct it
*, struct window
*,
663 struct glyph_row
*));
664 static void back_to_previous_line_start
P_ ((struct it
*));
665 static void forward_to_next_line_start
P_ ((struct it
*));
666 static struct text_pos string_pos_nchars_ahead
P_ ((struct text_pos
,
668 static struct text_pos string_pos
P_ ((int, Lisp_Object
));
669 static struct text_pos c_string_pos
P_ ((int, unsigned char *, int));
670 static int number_of_chars
P_ ((unsigned char *, int));
671 static void compute_stop_pos
P_ ((struct it
*));
672 static void compute_string_pos
P_ ((struct text_pos
*, struct text_pos
,
674 static int face_before_or_after_it_pos
P_ ((struct it
*, int));
675 static int next_overlay_change
P_ ((int));
676 static int handle_single_display_prop
P_ ((struct it
*, Lisp_Object
,
677 Lisp_Object
, struct text_pos
*));
679 #define face_before_it_pos(IT) face_before_or_after_it_pos ((IT), 1)
680 #define face_after_it_pos(IT) face_before_or_after_it_pos ((IT), 0)
682 #ifdef HAVE_WINDOW_SYSTEM
684 static void update_tool_bar
P_ ((struct frame
*, int));
685 static void build_desired_tool_bar_string
P_ ((struct frame
*f
));
686 static int redisplay_tool_bar
P_ ((struct frame
*));
687 static void display_tool_bar_line
P_ ((struct it
*));
689 #endif /* HAVE_WINDOW_SYSTEM */
692 /***********************************************************************
693 Window display dimensions
694 ***********************************************************************/
696 /* Return the window-relative maximum y + 1 for glyph rows displaying
697 text in window W. This is the height of W minus the height of a
698 mode line, if any. */
701 window_text_bottom_y (w
)
704 struct frame
*f
= XFRAME (w
->frame
);
705 int height
= XFASTINT (w
->height
) * CANON_Y_UNIT (f
);
707 if (WINDOW_WANTS_MODELINE_P (w
))
708 height
-= CURRENT_MODE_LINE_HEIGHT (w
);
713 /* Return the pixel width of display area AREA of window W. AREA < 0
714 means return the total width of W, not including bitmap areas to
715 the left and right of the window. */
718 window_box_width (w
, area
)
722 struct frame
*f
= XFRAME (w
->frame
);
723 int width
= XFASTINT (w
->width
);
725 if (!w
->pseudo_window_p
)
727 width
-= FRAME_SCROLL_BAR_WIDTH (f
) + FRAME_FLAGS_AREA_COLS (f
);
729 if (area
== TEXT_AREA
)
731 if (INTEGERP (w
->left_margin_width
))
732 width
-= XFASTINT (w
->left_margin_width
);
733 if (INTEGERP (w
->right_margin_width
))
734 width
-= XFASTINT (w
->right_margin_width
);
736 else if (area
== LEFT_MARGIN_AREA
)
737 width
= (INTEGERP (w
->left_margin_width
)
738 ? XFASTINT (w
->left_margin_width
) : 0);
739 else if (area
== RIGHT_MARGIN_AREA
)
740 width
= (INTEGERP (w
->right_margin_width
)
741 ? XFASTINT (w
->right_margin_width
) : 0);
744 return width
* CANON_X_UNIT (f
);
748 /* Return the pixel height of the display area of window W, not
749 including mode lines of W, if any.. */
752 window_box_height (w
)
755 struct frame
*f
= XFRAME (w
->frame
);
756 int height
= XFASTINT (w
->height
) * CANON_Y_UNIT (f
);
758 if (WINDOW_WANTS_MODELINE_P (w
))
759 height
-= CURRENT_MODE_LINE_HEIGHT (w
);
761 if (WINDOW_WANTS_HEADER_LINE_P (w
))
762 height
-= CURRENT_HEADER_LINE_HEIGHT (w
);
768 /* Return the frame-relative coordinate of the left edge of display
769 area AREA of window W. AREA < 0 means return the left edge of the
770 whole window, to the right of any bitmap area at the left side of
774 window_box_left (w
, area
)
778 struct frame
*f
= XFRAME (w
->frame
);
779 int x
= FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
);
781 if (!w
->pseudo_window_p
)
783 x
+= (WINDOW_LEFT_MARGIN (w
) * CANON_X_UNIT (f
)
784 + FRAME_LEFT_FLAGS_AREA_WIDTH (f
));
786 if (area
== TEXT_AREA
)
787 x
+= window_box_width (w
, LEFT_MARGIN_AREA
);
788 else if (area
== RIGHT_MARGIN_AREA
)
789 x
+= (window_box_width (w
, LEFT_MARGIN_AREA
)
790 + window_box_width (w
, TEXT_AREA
));
797 /* Return the frame-relative coordinate of the right edge of display
798 area AREA of window W. AREA < 0 means return the left edge of the
799 whole window, to the left of any bitmap area at the right side of
803 window_box_right (w
, area
)
807 return window_box_left (w
, area
) + window_box_width (w
, area
);
811 /* Get the bounding box of the display area AREA of window W, without
812 mode lines, in frame-relative coordinates. AREA < 0 means the
813 whole window, not including bitmap areas to the left and right of
814 the window. Return in *BOX_X and *BOX_Y the frame-relative pixel
815 coordinates of the upper-left corner of the box. Return in
816 *BOX_WIDTH, and *BOX_HEIGHT the pixel width and height of the box. */
819 window_box (w
, area
, box_x
, box_y
, box_width
, box_height
)
822 int *box_x
, *box_y
, *box_width
, *box_height
;
824 struct frame
*f
= XFRAME (w
->frame
);
826 *box_width
= window_box_width (w
, area
);
827 *box_height
= window_box_height (w
);
828 *box_x
= window_box_left (w
, area
);
829 *box_y
= (FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
)
830 + XFASTINT (w
->top
) * CANON_Y_UNIT (f
));
831 if (WINDOW_WANTS_HEADER_LINE_P (w
))
832 *box_y
+= CURRENT_HEADER_LINE_HEIGHT (w
);
836 /* Get the bounding box of the display area AREA of window W, without
837 mode lines. AREA < 0 means the whole window, not including bitmap
838 areas to the left and right of the window. Return in *TOP_LEFT_X
839 and TOP_LEFT_Y the frame-relative pixel coordinates of the
840 upper-left corner of the box. Return in *BOTTOM_RIGHT_X, and
841 *BOTTOM_RIGHT_Y the coordinates of the bottom-right corner of the
845 window_box_edges (w
, area
, top_left_x
, top_left_y
,
846 bottom_right_x
, bottom_right_y
)
849 int *top_left_x
, *top_left_y
, *bottom_right_x
, *bottom_right_y
;
851 window_box (w
, area
, top_left_x
, top_left_y
, bottom_right_x
,
853 *bottom_right_x
+= *top_left_x
;
854 *bottom_right_y
+= *top_left_y
;
859 /***********************************************************************
861 ***********************************************************************/
863 /* Return the next character from STR which is MAXLEN bytes long.
864 Return in *LEN the length of the character. This is like
865 STRING_CHAR_AND_LENGTH but never returns an invalid character. If
866 we find one, we return a `?', but with the length of the illegal
870 string_char_and_length (str
, maxlen
, len
)
876 c
= STRING_CHAR_AND_LENGTH (str
, maxlen
, *len
);
877 if (!CHAR_VALID_P (c
, 1))
878 /* We may not change the length here because other places in Emacs
879 don't use this function, i.e. they silently accept illegal
888 /* Given a position POS containing a valid character and byte position
889 in STRING, return the position NCHARS ahead (NCHARS >= 0). */
891 static struct text_pos
892 string_pos_nchars_ahead (pos
, string
, nchars
)
897 xassert (STRINGP (string
) && nchars
>= 0);
899 if (STRING_MULTIBYTE (string
))
901 int rest
= STRING_BYTES (XSTRING (string
)) - BYTEPOS (pos
);
902 unsigned char *p
= XSTRING (string
)->data
+ BYTEPOS (pos
);
907 string_char_and_length (p
, rest
, &len
);
908 p
+= len
, rest
-= len
;
911 BYTEPOS (pos
) += len
;
915 SET_TEXT_POS (pos
, CHARPOS (pos
) + nchars
, BYTEPOS (pos
) + nchars
);
921 /* Value is the text position, i.e. character and byte position,
922 for character position CHARPOS in STRING. */
924 static INLINE
struct text_pos
925 string_pos (charpos
, string
)
930 xassert (STRINGP (string
));
931 xassert (charpos
>= 0);
932 SET_TEXT_POS (pos
, charpos
, string_char_to_byte (string
, charpos
));
937 /* Value is a text position, i.e. character and byte position, for
938 character position CHARPOS in C string S. MULTIBYTE_P non-zero
939 means recognize multibyte characters. */
941 static struct text_pos
942 c_string_pos (charpos
, s
, multibyte_p
)
950 xassert (charpos
>= 0);
954 int rest
= strlen (s
), len
;
956 SET_TEXT_POS (pos
, 0, 0);
959 string_char_and_length (s
, rest
, &len
);
960 s
+= len
, rest
-= len
;
963 BYTEPOS (pos
) += len
;
967 SET_TEXT_POS (pos
, charpos
, charpos
);
973 /* Value is the number of characters in C string S. MULTIBYTE_P
974 non-zero means recognize multibyte characters. */
977 number_of_chars (s
, multibyte_p
)
985 int rest
= strlen (s
), len
;
986 unsigned char *p
= (unsigned char *) s
;
988 for (nchars
= 0; rest
> 0; ++nchars
)
990 string_char_and_length (p
, rest
, &len
);
991 rest
-= len
, p
+= len
;
1001 /* Compute byte position NEWPOS->bytepos corresponding to
1002 NEWPOS->charpos. POS is a known position in string STRING.
1003 NEWPOS->charpos must be >= POS.charpos. */
1006 compute_string_pos (newpos
, pos
, string
)
1007 struct text_pos
*newpos
, pos
;
1010 xassert (STRINGP (string
));
1011 xassert (CHARPOS (*newpos
) >= CHARPOS (pos
));
1013 if (STRING_MULTIBYTE (string
))
1014 *newpos
= string_pos_nchars_ahead (pos
, CHARPOS (*newpos
) - CHARPOS (pos
),
1017 BYTEPOS (*newpos
) = CHARPOS (*newpos
);
1021 /* Return the charset of the character at position POS in
1025 charset_at_position (pos
)
1026 struct text_pos pos
;
1029 unsigned char *p
= BYTE_POS_ADDR (BYTEPOS (pos
));
1031 multibyte_p
= !NILP (current_buffer
->enable_multibyte_characters
);
1034 int maxlen
= ((BYTEPOS (pos
) >= GPT_BYTE
? ZV_BYTE
: GPT_BYTE
)
1037 c
= string_char_and_length (p
, maxlen
, &len
);
1042 return CHAR_CHARSET (c
);
1047 /***********************************************************************
1048 Lisp form evaluation
1049 ***********************************************************************/
1051 /* Error handler for eval_form. */
1061 /* Evaluate SEXPR and return the result, or nil if something went
1068 int count
= specpdl_ptr
- specpdl
;
1070 specbind (Qinhibit_redisplay
, Qt
);
1071 val
= internal_condition_case_1 (Feval
, sexpr
, Qerror
, eval_handler
);
1072 return unbind_to (count
, val
);
1077 /***********************************************************************
1079 ***********************************************************************/
1083 /* Define CHECK_IT to perform sanity checks on iterators.
1084 This is for debugging. It is too slow to do unconditionally. */
1090 if (it
->method
== next_element_from_string
)
1092 xassert (STRINGP (it
->string
));
1093 xassert (IT_STRING_CHARPOS (*it
) >= 0);
1095 else if (it
->method
== next_element_from_buffer
)
1097 /* Check that character and byte positions agree. */
1098 xassert (IT_CHARPOS (*it
) == BYTE_TO_CHAR (IT_BYTEPOS (*it
)));
1102 xassert (it
->current
.dpvec_index
>= 0);
1104 xassert (it
->current
.dpvec_index
< 0);
1107 #define CHECK_IT(IT) check_it ((IT))
1111 #define CHECK_IT(IT) (void) 0
1118 /* Check that the window end of window W is what we expect it
1119 to be---the last row in the current matrix displaying text. */
1122 check_window_end (w
)
1125 if (!MINI_WINDOW_P (w
)
1126 && !NILP (w
->window_end_valid
))
1128 struct glyph_row
*row
;
1129 xassert ((row
= MATRIX_ROW (w
->current_matrix
,
1130 XFASTINT (w
->window_end_vpos
)),
1132 || MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1133 || MATRIX_ROW_VPOS (row
, w
->current_matrix
) == 0));
1137 #define CHECK_WINDOW_END(W) check_window_end ((W))
1139 #else /* not GLYPH_DEBUG */
1141 #define CHECK_WINDOW_END(W) (void) 0
1143 #endif /* not GLYPH_DEBUG */
1147 /***********************************************************************
1148 Iterator initialization
1149 ***********************************************************************/
1151 /* Initialize IT for displaying current_buffer in window W, starting
1152 at character position CHARPOS. CHARPOS < 0 means that no buffer
1153 position is specified which is useful when the iterator is assigned
1154 a position later. BYTEPOS is the byte position corresponding to
1155 CHARPOS. BYTEPOS <= 0 means compute it from CHARPOS.
1157 If ROW is not null, calls to produce_glyphs with IT as parameter
1158 will produce glyphs in that row.
1160 BASE_FACE_ID is the id of a base face to use. It must be one of
1161 DEFAULT_FACE_ID for normal text, MODE_LINE_FACE_ID or
1162 HEADER_LINE_FACE_ID for displaying mode lines, or TOOL_BAR_FACE_ID for
1163 displaying the tool-bar.
1165 If ROW is null and BASE_FACE_ID is equal to MODE_LINE_FACE_ID or
1166 HEADER_LINE_FACE_ID, the iterator will be initialized to use the
1167 corresponding mode line glyph row of the desired matrix of W. */
1170 init_iterator (it
, w
, charpos
, bytepos
, row
, base_face_id
)
1173 int charpos
, bytepos
;
1174 struct glyph_row
*row
;
1175 enum face_id base_face_id
;
1177 int highlight_region_p
;
1179 /* Some precondition checks. */
1180 xassert (w
!= NULL
&& it
!= NULL
);
1181 xassert (charpos
< 0 || (charpos
> 0 && charpos
<= ZV
));
1183 /* If face attributes have been changed since the last redisplay,
1184 free realized faces now because they depend on face definitions
1185 that might have changed. */
1186 if (face_change_count
)
1188 face_change_count
= 0;
1189 free_all_realized_faces (Qnil
);
1192 /* Use one of the mode line rows of W's desired matrix if
1196 if (base_face_id
== MODE_LINE_FACE_ID
)
1197 row
= MATRIX_MODE_LINE_ROW (w
->desired_matrix
);
1198 else if (base_face_id
== HEADER_LINE_FACE_ID
)
1199 row
= MATRIX_HEADER_LINE_ROW (w
->desired_matrix
);
1203 bzero (it
, sizeof *it
);
1204 it
->current
.overlay_string_index
= -1;
1205 it
->current
.dpvec_index
= -1;
1206 it
->charset
= CHARSET_ASCII
;
1207 it
->base_face_id
= base_face_id
;
1209 /* The window in which we iterate over current_buffer: */
1210 XSETWINDOW (it
->window
, w
);
1212 it
->f
= XFRAME (w
->frame
);
1214 /* If realized faces have been removed, e.g. because of face
1215 attribute changes of named faces, recompute them. */
1216 if (FRAME_FACE_CACHE (it
->f
)->used
== 0)
1217 recompute_basic_faces (it
->f
);
1219 /* Current value of the `space-width', and 'height' properties. */
1220 it
->space_width
= Qnil
;
1221 it
->font_height
= Qnil
;
1223 /* Are control characters displayed as `^C'? */
1224 it
->ctl_arrow_p
= !NILP (current_buffer
->ctl_arrow
);
1226 /* -1 means everything between a CR and the following line end
1227 is invisible. >0 means lines indented more than this value are
1229 it
->selective
= (INTEGERP (current_buffer
->selective_display
)
1230 ? XFASTINT (current_buffer
->selective_display
)
1231 : (!NILP (current_buffer
->selective_display
)
1233 it
->selective_display_ellipsis_p
1234 = !NILP (current_buffer
->selective_display_ellipses
);
1236 /* Display table to use. */
1237 it
->dp
= window_display_table (w
);
1239 /* Are multibyte characters enabled in current_buffer? */
1240 it
->multibyte_p
= !NILP (current_buffer
->enable_multibyte_characters
);
1242 /* Non-zero if we should highlight the region. */
1244 = (!NILP (Vtransient_mark_mode
)
1245 && !NILP (current_buffer
->mark_active
)
1246 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
1248 /* Set IT->region_beg_charpos and IT->region_end_charpos to the
1249 start and end of a visible region in window IT->w. Set both to
1250 -1 to indicate no region. */
1251 if (highlight_region_p
1252 /* Maybe highlight only in selected window. */
1253 && (/* Either show region everywhere. */
1254 highlight_nonselected_windows
1255 /* Or show region in the selected window. */
1256 || w
== XWINDOW (selected_window
)
1257 /* Or show the region if we are in the mini-buffer and W is
1258 the window the mini-buffer refers to. */
1259 || (MINI_WINDOW_P (XWINDOW (selected_window
))
1260 && w
== XWINDOW (Vminibuf_scroll_window
))))
1262 int charpos
= marker_position (current_buffer
->mark
);
1263 it
->region_beg_charpos
= min (PT
, charpos
);
1264 it
->region_end_charpos
= max (PT
, charpos
);
1267 it
->region_beg_charpos
= it
->region_end_charpos
= -1;
1269 /* Get the position at which the redisplay_end_trigger hook should
1270 be run, if it is to be run at all. */
1271 if (MARKERP (w
->redisplay_end_trigger
)
1272 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
1273 it
->redisplay_end_trigger_charpos
1274 = marker_position (w
->redisplay_end_trigger
);
1275 else if (INTEGERP (w
->redisplay_end_trigger
))
1276 it
->redisplay_end_trigger_charpos
= XINT (w
->redisplay_end_trigger
);
1278 /* Correct bogus values of tab_width. */
1279 it
->tab_width
= XINT (current_buffer
->tab_width
);
1280 if (it
->tab_width
<= 0 || it
->tab_width
> 1000)
1283 /* Are lines in the display truncated? */
1284 it
->truncate_lines_p
1285 = (base_face_id
!= DEFAULT_FACE_ID
1286 || XINT (it
->w
->hscroll
)
1287 || (truncate_partial_width_windows
1288 && !WINDOW_FULL_WIDTH_P (it
->w
))
1289 || !NILP (current_buffer
->truncate_lines
));
1291 /* Get dimensions of truncation and continuation glyphs. These are
1292 displayed as bitmaps under X, so we don't need them for such
1294 if (!FRAME_WINDOW_P (it
->f
))
1296 if (it
->truncate_lines_p
)
1298 /* We will need the truncation glyph. */
1299 xassert (it
->glyph_row
== NULL
);
1300 produce_special_glyphs (it
, IT_TRUNCATION
);
1301 it
->truncation_pixel_width
= it
->pixel_width
;
1305 /* We will need the continuation glyph. */
1306 xassert (it
->glyph_row
== NULL
);
1307 produce_special_glyphs (it
, IT_CONTINUATION
);
1308 it
->continuation_pixel_width
= it
->pixel_width
;
1311 /* Reset these values to zero becaue the produce_special_glyphs
1312 above has changed them. */
1313 it
->pixel_width
= it
->ascent
= it
->descent
= 0;
1314 it
->phys_ascent
= it
->phys_descent
= 0;
1317 /* Set this after getting the dimensions of truncation and
1318 continuation glyphs, so that we don't produce glyphs when calling
1319 produce_special_glyphs, above. */
1320 it
->glyph_row
= row
;
1321 it
->area
= TEXT_AREA
;
1323 /* Get the dimensions of the display area. The display area
1324 consists of the visible window area plus a horizontally scrolled
1325 part to the left of the window. All x-values are relative to the
1326 start of this total display area. */
1327 if (base_face_id
!= DEFAULT_FACE_ID
)
1329 /* Mode lines, menu bar in terminal frames. */
1330 it
->first_visible_x
= 0;
1331 it
->last_visible_x
= XFASTINT (w
->width
) * CANON_X_UNIT (it
->f
);
1336 = XFASTINT (it
->w
->hscroll
) * CANON_X_UNIT (it
->f
);
1337 it
->last_visible_x
= (it
->first_visible_x
1338 + window_box_width (w
, TEXT_AREA
));
1340 /* If we truncate lines, leave room for the truncator glyph(s) at
1341 the right margin. Otherwise, leave room for the continuation
1342 glyph(s). Truncation and continuation glyphs are not inserted
1343 for window-based redisplay. */
1344 if (!FRAME_WINDOW_P (it
->f
))
1346 if (it
->truncate_lines_p
)
1347 it
->last_visible_x
-= it
->truncation_pixel_width
;
1349 it
->last_visible_x
-= it
->continuation_pixel_width
;
1352 it
->header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
1353 it
->current_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
) + w
->vscroll
;
1356 /* Leave room for a border glyph. */
1357 if (!FRAME_WINDOW_P (it
->f
)
1358 && !WINDOW_RIGHTMOST_P (it
->w
))
1359 it
->last_visible_x
-= 1;
1361 it
->last_visible_y
= window_text_bottom_y (w
);
1363 /* For mode lines and alike, arrange for the first glyph having a
1364 left box line if the face specifies a box. */
1365 if (base_face_id
!= DEFAULT_FACE_ID
)
1369 it
->face_id
= base_face_id
;
1371 /* If we have a boxed mode line, make the first character appear
1372 with a left box line. */
1373 face
= FACE_FROM_ID (it
->f
, base_face_id
);
1374 if (face
->box
!= FACE_NO_BOX
)
1375 it
->start_of_box_run_p
= 1;
1378 /* If a buffer position was specified, set the iterator there,
1379 getting overlays and face properties from that position. */
1382 it
->end_charpos
= ZV
;
1384 IT_CHARPOS (*it
) = charpos
;
1386 /* Compute byte position if not specified. */
1388 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (charpos
);
1390 IT_BYTEPOS (*it
) = bytepos
;
1392 /* Compute faces etc. */
1393 reseat (it
, it
->current
.pos
, 1);
1400 /* Initialize IT for the display of window W with window start POS. */
1403 start_display (it
, w
, pos
)
1406 struct text_pos pos
;
1408 int start_at_line_beg_p
;
1409 struct glyph_row
*row
;
1410 int first_vpos
= WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0;
1413 row
= w
->desired_matrix
->rows
+ first_vpos
;
1414 init_iterator (it
, w
, CHARPOS (pos
), BYTEPOS (pos
), row
, DEFAULT_FACE_ID
);
1415 first_y
= it
->current_y
;
1417 /* If window start is not at a line start, move back to the line
1418 start. This makes sure that we take continuation lines into
1420 start_at_line_beg_p
= (CHARPOS (pos
) == BEGV
1421 || FETCH_BYTE (BYTEPOS (pos
) - 1) == '\n');
1422 if (!start_at_line_beg_p
)
1423 reseat_at_previous_visible_line_start (it
);
1425 /* If window start is not at a line start, skip forward to POS to
1426 get the correct continuation_lines_width and current_x. */
1427 if (!start_at_line_beg_p
)
1429 move_it_to (it
, CHARPOS (pos
), -1, -1, -1, MOVE_TO_POS
);
1431 /* If lines are continued, this line may end in the middle of a
1432 multi-glyph character (e.g. a control character displayed as
1433 \003, or in the middle of an overlay string). In this case
1434 move_it_to above will not have taken us to the start of
1435 the continuation line but to the end of the continued line. */
1436 if (!it
->truncate_lines_p
&& it
->current_x
> 0)
1438 if (it
->current
.dpvec_index
>= 0
1439 || it
->current
.overlay_string_index
>= 0)
1441 set_iterator_to_next (it
);
1442 move_it_in_display_line_to (it
, -1, -1, 0);
1444 it
->continuation_lines_width
+= it
->current_x
;
1447 it
->current_y
= first_y
;
1449 it
->current_x
= it
->hpos
= 0;
1452 #if 0 /* Don't assert the following because start_display is sometimes
1453 called intentionally with a window start that is not at a
1454 line start. Please leave this code in as a comment. */
1456 /* Window start should be on a line start, now. */
1457 xassert (it
->continuation_lines_width
1458 || IT_CHARPOS (it
) == BEGV
1459 || FETCH_BYTE (IT_BYTEPOS (it
) - 1) == '\n');
1464 /* Initialize IT for stepping through current_buffer in window W,
1465 starting at position POS that includes overlay string and display
1466 vector/ control character translation position information. */
1469 init_from_display_pos (it
, w
, pos
)
1472 struct display_pos
*pos
;
1474 /* Keep in mind: the call to reseat in init_iterator skips invisible
1475 text, so we might end up at a position different from POS. This
1476 is only a problem when POS is a row start after a newline and an
1477 overlay starts there with an after-string, and the overlay has an
1478 invisible property. Since we don't skip invisible text in
1479 display_line and elsewhere immediately after consuming the
1480 newline before the row start, such a POS will not be in a string,
1481 but the call to init_iterator below will move us to the
1483 init_iterator (it
, w
, CHARPOS (pos
->pos
), BYTEPOS (pos
->pos
),
1484 NULL
, DEFAULT_FACE_ID
);
1486 /* If position is within an overlay string, set up IT to
1487 the right overlay string. */
1488 if (pos
->overlay_string_index
>= 0)
1492 /* We already have the first chunk of overlay strings in
1493 IT->overlay_strings. Load more until the one for
1494 pos->overlay_string_index is in IT->overlay_strings. */
1495 if (pos
->overlay_string_index
>= OVERLAY_STRING_CHUNK_SIZE
)
1497 int n
= pos
->overlay_string_index
/ OVERLAY_STRING_CHUNK_SIZE
;
1498 it
->current
.overlay_string_index
= 0;
1501 load_overlay_strings (it
);
1502 it
->current
.overlay_string_index
+= OVERLAY_STRING_CHUNK_SIZE
;
1506 it
->current
.overlay_string_index
= pos
->overlay_string_index
;
1507 relative_index
= (it
->current
.overlay_string_index
1508 % OVERLAY_STRING_CHUNK_SIZE
);
1509 it
->string
= it
->overlay_strings
[relative_index
];
1510 it
->current
.string_pos
= pos
->string_pos
;
1511 it
->method
= next_element_from_string
;
1513 else if (CHARPOS (pos
->string_pos
) >= 0)
1515 /* Recorded position is not in an overlay string, but in another
1516 string. This can only be a string from a `display' property.
1517 IT should already be filled with that string. */
1518 it
->current
.string_pos
= pos
->string_pos
;
1519 xassert (STRINGP (it
->string
));
1522 /* Restore position in display vector translations or control
1523 character translations. */
1524 if (pos
->dpvec_index
>= 0)
1526 /* This fills IT->dpvec. */
1527 get_next_display_element (it
);
1528 xassert (it
->dpvec
&& it
->current
.dpvec_index
== 0);
1529 it
->current
.dpvec_index
= pos
->dpvec_index
;
1536 /* Initialize IT for stepping through current_buffer in window W
1537 starting at ROW->start. */
1540 init_to_row_start (it
, w
, row
)
1543 struct glyph_row
*row
;
1545 init_from_display_pos (it
, w
, &row
->start
);
1546 it
->continuation_lines_width
= row
->continuation_lines_width
;
1551 /* Initialize IT for stepping through current_buffer in window W
1552 starting in the line following ROW, i.e. starting at ROW->end. */
1555 init_to_row_end (it
, w
, row
)
1558 struct glyph_row
*row
;
1560 init_from_display_pos (it
, w
, &row
->end
);
1562 if (row
->continued_p
)
1563 it
->continuation_lines_width
= (row
->continuation_lines_width
1564 + row
->pixel_width
);
1571 /***********************************************************************
1573 ***********************************************************************/
1575 /* Called when IT reaches IT->stop_charpos. Handle text property and
1576 overlay changes. Set IT->stop_charpos to the next position where
1583 enum prop_handled handled
;
1584 int handle_overlay_change_p
= 1;
1588 it
->current
.dpvec_index
= -1;
1592 handled
= HANDLED_NORMALLY
;
1594 /* Call text property handlers. */
1595 for (p
= it_props
; p
->handler
; ++p
)
1597 handled
= p
->handler (it
);
1599 if (handled
== HANDLED_RECOMPUTE_PROPS
)
1601 else if (handled
== HANDLED_RETURN
)
1603 else if (handled
== HANDLED_OVERLAY_STRING_CONSUMED
)
1604 handle_overlay_change_p
= 0;
1607 if (handled
!= HANDLED_RECOMPUTE_PROPS
)
1609 /* Don't check for overlay strings below when set to deliver
1610 characters from a display vector. */
1611 if (it
->method
== next_element_from_display_vector
)
1612 handle_overlay_change_p
= 0;
1614 /* Handle overlay changes. */
1615 if (handle_overlay_change_p
)
1616 handled
= handle_overlay_change (it
);
1618 /* Determine where to stop next. */
1619 if (handled
== HANDLED_NORMALLY
)
1620 compute_stop_pos (it
);
1623 while (handled
== HANDLED_RECOMPUTE_PROPS
);
1627 /* Compute IT->stop_charpos from text property and overlay change
1628 information for IT's current position. */
1631 compute_stop_pos (it
)
1634 register INTERVAL iv
, next_iv
;
1635 Lisp_Object object
, limit
, position
;
1637 /* If nowhere else, stop at the end. */
1638 it
->stop_charpos
= it
->end_charpos
;
1640 if (STRINGP (it
->string
))
1642 /* Strings are usually short, so don't limit the search for
1644 object
= it
->string
;
1646 XSETFASTINT (position
, IT_STRING_CHARPOS (*it
));
1652 /* If next overlay change is in front of the current stop pos
1653 (which is IT->end_charpos), stop there. Note: value of
1654 next_overlay_change is point-max if no overlay change
1656 charpos
= next_overlay_change (IT_CHARPOS (*it
));
1657 if (charpos
< it
->stop_charpos
)
1658 it
->stop_charpos
= charpos
;
1660 /* If showing the region, we have to stop at the region
1661 start or end because the face might change there. */
1662 if (it
->region_beg_charpos
> 0)
1664 if (IT_CHARPOS (*it
) < it
->region_beg_charpos
)
1665 it
->stop_charpos
= min (it
->stop_charpos
, it
->region_beg_charpos
);
1666 else if (IT_CHARPOS (*it
) < it
->region_end_charpos
)
1667 it
->stop_charpos
= min (it
->stop_charpos
, it
->region_end_charpos
);
1670 /* Set up variables for computing the stop position from text
1671 property changes. */
1672 XSETBUFFER (object
, current_buffer
);
1673 XSETFASTINT (limit
, IT_CHARPOS (*it
) + TEXT_PROP_DISTANCE_LIMIT
);
1674 XSETFASTINT (position
, IT_CHARPOS (*it
));
1678 /* Get the interval containing IT's position. Value is a null
1679 interval if there isn't such an interval. */
1680 iv
= validate_interval_range (object
, &position
, &position
, 0);
1681 if (!NULL_INTERVAL_P (iv
))
1683 Lisp_Object values_here
[LAST_PROP_IDX
];
1686 /* Get properties here. */
1687 for (p
= it_props
; p
->handler
; ++p
)
1688 values_here
[p
->idx
] = textget (iv
->plist
, *p
->name
);
1690 /* Look for an interval following iv that has different
1692 for (next_iv
= next_interval (iv
);
1693 (!NULL_INTERVAL_P (next_iv
)
1695 || XFASTINT (limit
) > next_iv
->position
));
1696 next_iv
= next_interval (next_iv
))
1698 for (p
= it_props
; p
->handler
; ++p
)
1700 Lisp_Object new_value
;
1702 new_value
= textget (next_iv
->plist
, *p
->name
);
1703 if (!EQ (values_here
[p
->idx
], new_value
))
1711 if (!NULL_INTERVAL_P (next_iv
))
1713 if (INTEGERP (limit
)
1714 && next_iv
->position
>= XFASTINT (limit
))
1715 /* No text property change up to limit. */
1716 it
->stop_charpos
= min (XFASTINT (limit
), it
->stop_charpos
);
1718 /* Text properties change in next_iv. */
1719 it
->stop_charpos
= min (it
->stop_charpos
, next_iv
->position
);
1723 xassert (STRINGP (it
->string
)
1724 || (it
->stop_charpos
>= BEGV
1725 && it
->stop_charpos
>= IT_CHARPOS (*it
)));
1729 /* Return the position of the next overlay change after POS in
1730 current_buffer. Value is point-max if no overlay change
1731 follows. This is like `next-overlay-change' but doesn't use
1735 next_overlay_change (pos
)
1740 Lisp_Object
*overlays
;
1744 /* Get all overlays at the given position. */
1746 overlays
= (Lisp_Object
*) alloca (len
* sizeof *overlays
);
1747 noverlays
= overlays_at (pos
, 0, &overlays
, &len
, &endpos
, NULL
);
1748 if (noverlays
> len
)
1751 overlays
= (Lisp_Object
*) alloca (len
* sizeof *overlays
);
1752 noverlays
= overlays_at (pos
, 0, &overlays
, &len
, &endpos
, NULL
);
1755 /* If any of these overlays ends before endpos,
1756 use its ending point instead. */
1757 for (i
= 0; i
< noverlays
; ++i
)
1762 oend
= OVERLAY_END (overlays
[i
]);
1763 oendpos
= OVERLAY_POSITION (oend
);
1764 endpos
= min (endpos
, oendpos
);
1772 /***********************************************************************
1774 ***********************************************************************/
1776 /* Handle changes in the `fontified' property of the current buffer by
1777 calling hook functions from Qfontification_functions to fontify
1780 static enum prop_handled
1781 handle_fontified_prop (it
)
1784 Lisp_Object prop
, pos
;
1785 enum prop_handled handled
= HANDLED_NORMALLY
;
1787 /* Get the value of the `fontified' property at IT's current buffer
1788 position. (The `fontified' property doesn't have a special
1789 meaning in strings.) If the value is nil, call functions from
1790 Qfontification_functions. */
1791 if (!STRINGP (it
->string
)
1793 && !NILP (Vfontification_functions
)
1794 && (pos
= make_number (IT_CHARPOS (*it
)),
1795 prop
= Fget_char_property (pos
, Qfontified
, Qnil
),
1798 Lisp_Object args
[2];
1800 /* Run the hook functions. */
1801 args
[0] = Qfontification_functions
;
1803 Frun_hook_with_args (make_number (2), args
);
1805 /* Return HANDLED_RECOMPUTE_PROPS only if function fontified
1806 something. This avoids an endless loop if they failed to
1807 fontify the text for which reason ever. */
1808 if (!NILP (Fget_char_property (pos
, Qfontified
, Qnil
)))
1809 handled
= HANDLED_RECOMPUTE_PROPS
;
1817 /***********************************************************************
1819 ***********************************************************************/
1821 /* Set up iterator IT from face properties at its current position.
1822 Called from handle_stop. */
1824 static enum prop_handled
1825 handle_face_prop (it
)
1828 int new_face_id
, next_stop
;
1830 if (!STRINGP (it
->string
))
1833 = face_at_buffer_position (it
->w
,
1835 it
->region_beg_charpos
,
1836 it
->region_end_charpos
,
1839 + TEXT_PROP_DISTANCE_LIMIT
),
1842 /* Is this a start of a run of characters with box face?
1843 Caveat: this can be called for a freshly initialized
1844 iterator; face_id is -1 is this case. We know that the new
1845 face will not change until limit, i.e. if the new face has a
1846 box, all characters up to limit will have one. But, as
1847 usual, we don't know whether limit is really the end. */
1848 if (new_face_id
!= it
->face_id
)
1850 struct face
*new_face
= FACE_FROM_ID (it
->f
, new_face_id
);
1852 /* If new face has a box but old face has not, this is
1853 the start of a run of characters with box, i.e. it has
1854 a shadow on the left side. The value of face_id of the
1855 iterator will be -1 if this is the initial call that gets
1856 the face. In this case, we have to look in front of IT's
1857 position and see whether there is a face != new_face_id. */
1858 it
->start_of_box_run_p
1859 = (new_face
->box
!= FACE_NO_BOX
1860 && (it
->face_id
>= 0
1861 || IT_CHARPOS (*it
) == BEG
1862 || new_face_id
!= face_before_it_pos (it
)));
1863 it
->face_box_p
= new_face
->box
!= FACE_NO_BOX
;
1869 = face_at_string_position (it
->w
,
1871 IT_STRING_CHARPOS (*it
),
1872 (it
->current
.overlay_string_index
>= 0
1875 it
->region_beg_charpos
,
1876 it
->region_end_charpos
,
1880 #if 0 /* This shouldn't be neccessary. Let's check it. */
1881 /* If IT is used to display a mode line we would really like to
1882 use the mode line face instead of the frame's default face. */
1883 if (it
->glyph_row
== MATRIX_MODE_LINE_ROW (it
->w
->desired_matrix
)
1884 && new_face_id
== DEFAULT_FACE_ID
)
1885 new_face_id
= MODE_LINE_FACE_ID
;
1888 /* Is this a start of a run of characters with box? Caveat:
1889 this can be called for a freshly allocated iterator; face_id
1890 is -1 is this case. We know that the new face will not
1891 change until the next check pos, i.e. if the new face has a
1892 box, all characters up to that position will have a
1893 box. But, as usual, we don't know whether that position
1894 is really the end. */
1895 if (new_face_id
!= it
->face_id
)
1897 struct face
*new_face
= FACE_FROM_ID (it
->f
, new_face_id
);
1898 struct face
*old_face
= FACE_FROM_ID (it
->f
, it
->face_id
);
1900 /* If new face has a box but old face hasn't, this is the
1901 start of a run of characters with box, i.e. it has a
1902 shadow on the left side. */
1903 it
->start_of_box_run_p
1904 = new_face
->box
&& (old_face
== NULL
|| !old_face
->box
);
1905 it
->face_box_p
= new_face
->box
!= FACE_NO_BOX
;
1909 it
->face_id
= new_face_id
;
1910 it
->charset
= CHARSET_ASCII
;
1911 return HANDLED_NORMALLY
;
1915 /* Compute the face one character before or after the current position
1916 of IT. BEFORE_P non-zero means get the face in front of IT's
1917 position. Value is the id of the face. */
1920 face_before_or_after_it_pos (it
, before_p
)
1925 int next_check_charpos
;
1926 struct text_pos pos
;
1928 xassert (it
->s
== NULL
);
1930 if (STRINGP (it
->string
))
1932 /* No face change past the end of the string (for the case
1933 we are padding with spaces). No face change before the
1935 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
1936 || (IT_STRING_CHARPOS (*it
) == 0 && before_p
))
1939 /* Set pos to the position before or after IT's current position. */
1941 pos
= string_pos (IT_STRING_CHARPOS (*it
) - 1, it
->string
);
1943 pos
= string_pos (IT_STRING_CHARPOS (*it
) + 1, it
->string
);
1945 /* Get the face for ASCII, or unibyte. */
1947 = face_at_string_position (it
->w
,
1950 (it
->current
.overlay_string_index
>= 0
1953 it
->region_beg_charpos
,
1954 it
->region_end_charpos
,
1955 &next_check_charpos
,
1958 /* Correct the face for charsets different from ASCII. Do it
1959 for the multibyte case only. The face returned above is
1960 suitable for unibyte text if IT->string is unibyte. */
1961 if (STRING_MULTIBYTE (it
->string
))
1963 unsigned char *p
= XSTRING (it
->string
)->data
+ BYTEPOS (pos
);
1964 int rest
= STRING_BYTES (XSTRING (it
->string
)) - BYTEPOS (pos
);
1965 int c
, len
, charset
;
1967 c
= string_char_and_length (p
, rest
, &len
);
1968 charset
= CHAR_CHARSET (c
);
1969 if (charset
!= CHARSET_ASCII
)
1970 face_id
= FACE_FOR_CHARSET (it
->f
, face_id
, charset
);
1975 if ((IT_CHARPOS (*it
) >= ZV
&& !before_p
)
1976 || (IT_CHARPOS (*it
) <= BEGV
&& before_p
))
1979 limit
= IT_CHARPOS (*it
) + TEXT_PROP_DISTANCE_LIMIT
;
1980 pos
= it
->current
.pos
;
1987 /* Determine face for CHARSET_ASCII, or unibyte. */
1988 face_id
= face_at_buffer_position (it
->w
,
1990 it
->region_beg_charpos
,
1991 it
->region_end_charpos
,
1992 &next_check_charpos
,
1995 /* Correct the face for charsets different from ASCII. Do it
1996 for the multibyte case only. The face returned above is
1997 suitable for unibyte text if current_buffer is unibyte. */
1998 if (it
->multibyte_p
)
2000 int charset
= charset_at_position (pos
);
2001 if (charset
!= CHARSET_ASCII
)
2002 face_id
= FACE_FOR_CHARSET (it
->f
, face_id
, charset
);
2011 /***********************************************************************
2013 ***********************************************************************/
2015 /* Set up iterator IT from invisible properties at its current
2016 position. Called from handle_stop. */
2018 static enum prop_handled
2019 handle_invisible_prop (it
)
2022 enum prop_handled handled
= HANDLED_NORMALLY
;
2024 if (STRINGP (it
->string
))
2026 extern Lisp_Object Qinvisible
;
2027 Lisp_Object prop
, end_charpos
, limit
, charpos
;
2029 /* Get the value of the invisible text property at the
2030 current position. Value will be nil if there is no such
2032 XSETFASTINT (charpos
, IT_STRING_CHARPOS (*it
));
2033 prop
= Fget_text_property (charpos
, Qinvisible
, it
->string
);
2037 handled
= HANDLED_RECOMPUTE_PROPS
;
2039 /* Get the position at which the next change of the
2040 invisible text property can be found in IT->string.
2041 Value will be nil if the property value is the same for
2042 all the rest of IT->string. */
2043 XSETINT (limit
, XSTRING (it
->string
)->size
);
2044 end_charpos
= Fnext_single_property_change (charpos
, Qinvisible
,
2047 /* Text at current position is invisible. The next
2048 change in the property is at position end_charpos.
2049 Move IT's current position to that position. */
2050 if (INTEGERP (end_charpos
)
2051 && XFASTINT (end_charpos
) < XFASTINT (limit
))
2053 struct text_pos old
;
2054 old
= it
->current
.string_pos
;
2055 IT_STRING_CHARPOS (*it
) = XFASTINT (end_charpos
);
2056 compute_string_pos (&it
->current
.string_pos
, old
, it
->string
);
2060 /* The rest of the string is invisible. If this is an
2061 overlay string, proceed with the next overlay string
2062 or whatever comes and return a character from there. */
2063 if (it
->current
.overlay_string_index
>= 0)
2065 next_overlay_string (it
);
2066 /* Don't check for overlay strings when we just
2067 finished processing them. */
2068 handled
= HANDLED_OVERLAY_STRING_CONSUMED
;
2072 struct Lisp_String
*s
= XSTRING (it
->string
);
2073 IT_STRING_CHARPOS (*it
) = s
->size
;
2074 IT_STRING_BYTEPOS (*it
) = STRING_BYTES (s
);
2081 int visible_p
, newpos
, next_stop
;
2082 Lisp_Object pos
, prop
;
2084 /* First of all, is there invisible text at this position? */
2085 XSETFASTINT (pos
, IT_CHARPOS (*it
));
2086 prop
= Fget_char_property (pos
, Qinvisible
, it
->window
);
2088 /* If we are on invisible text, skip over it. */
2089 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
2091 /* Record whether we have to display an ellipsis for the
2093 int display_ellipsis_p
2094 = TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (prop
);
2096 handled
= HANDLED_RECOMPUTE_PROPS
;
2098 /* Loop skipping over invisible text. The loop is left at
2099 ZV or with IT on the first char being visible again. */
2102 /* Try to skip some invisible text. Return value is the
2103 position reached which can be equal to IT's position
2104 if there is nothing invisible here. This skips both
2105 over invisible text properties and overlays with
2106 invisible property. */
2107 newpos
= skip_invisible (IT_CHARPOS (*it
),
2108 &next_stop
, ZV
, it
->window
);
2110 /* If we skipped nothing at all we weren't at invisible
2111 text in the first place. If everything to the end of
2112 the buffer was skipped, end the loop. */
2113 if (newpos
== IT_CHARPOS (*it
) || newpos
>= ZV
)
2117 /* We skipped some characters but not necessarily
2118 all there are. Check if we ended up on visible
2119 text. Fget_char_property returns the property of
2120 the char before the given position, i.e. if we
2121 get visible_p = 1, this means that the char at
2122 newpos is visible. */
2123 XSETFASTINT (pos
, newpos
);
2124 prop
= Fget_char_property (pos
, Qinvisible
, it
->window
);
2125 visible_p
= !TEXT_PROP_MEANS_INVISIBLE (prop
);
2128 /* If we ended up on invisible text, proceed to
2129 skip starting with next_stop. */
2131 IT_CHARPOS (*it
) = next_stop
;
2135 /* The position newpos is now either ZV or on visible text. */
2136 IT_CHARPOS (*it
) = newpos
;
2137 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (newpos
);
2139 /* Maybe return `...' next for the end of the invisible text. */
2140 if (display_ellipsis_p
)
2143 && VECTORP (DISP_INVIS_VECTOR (it
->dp
)))
2145 struct Lisp_Vector
*v
= XVECTOR (DISP_INVIS_VECTOR (it
->dp
));
2146 it
->dpvec
= v
->contents
;
2147 it
->dpend
= v
->contents
+ v
->size
;
2151 /* Default `...'. */
2152 it
->dpvec
= default_invis_vector
;
2153 it
->dpend
= default_invis_vector
+ 3;
2156 /* The ellipsis display does not replace the display of
2157 the character at the new position. Indicate this by
2158 setting IT->dpvec_char_len to zero. */
2159 it
->dpvec_char_len
= 0;
2161 it
->current
.dpvec_index
= 0;
2162 it
->method
= next_element_from_display_vector
;
2172 /***********************************************************************
2174 ***********************************************************************/
2176 /* Set up iterator IT from `display' property at its current position.
2177 Called from handle_stop. */
2179 static enum prop_handled
2180 handle_display_prop (it
)
2183 Lisp_Object prop
, object
;
2184 struct text_pos
*position
;
2185 int space_or_image_found_p
;
2187 if (STRINGP (it
->string
))
2189 object
= it
->string
;
2190 position
= &it
->current
.string_pos
;
2195 position
= &it
->current
.pos
;
2198 /* Reset those iterator values set from display property values. */
2199 it
->font_height
= Qnil
;
2200 it
->space_width
= Qnil
;
2203 /* We don't support recursive `display' properties, i.e. string
2204 values that have a string `display' property, that have a string
2205 `display' property etc. */
2206 if (!it
->string_from_display_prop_p
)
2207 it
->area
= TEXT_AREA
;
2209 prop
= Fget_char_property (make_number (position
->charpos
),
2212 return HANDLED_NORMALLY
;
2214 space_or_image_found_p
= 0;
2215 if (CONSP (prop
) && CONSP (XCAR (prop
)))
2217 while (CONSP (prop
))
2219 if (handle_single_display_prop (it
, XCAR (prop
), object
, position
))
2220 space_or_image_found_p
= 1;
2224 else if (VECTORP (prop
))
2227 for (i
= 0; i
< XVECTOR (prop
)->size
; ++i
)
2228 if (handle_single_display_prop (it
, XVECTOR (prop
)->contents
[i
],
2230 space_or_image_found_p
= 1;
2234 if (handle_single_display_prop (it
, prop
, object
, position
))
2235 space_or_image_found_p
= 1;
2238 return space_or_image_found_p
? HANDLED_RETURN
: HANDLED_NORMALLY
;
2242 /* Value is the position of the end of the `display' property stating
2243 at START_POS in OBJECT. */
2245 static struct text_pos
2246 display_prop_end (it
, object
, start_pos
)
2249 struct text_pos start_pos
;
2252 struct text_pos end_pos
;
2254 /* Characters having this form of property are not displayed, so
2255 we have to find the end of the property. */
2256 end
= Fnext_single_property_change (make_number (start_pos
.charpos
),
2257 Qdisplay
, object
, Qnil
);
2260 /* A nil value of `end' means there are no changes of the
2261 property to the end of the buffer or string. */
2262 if (it
->current
.overlay_string_index
>= 0)
2263 end_pos
.charpos
= XSTRING (it
->string
)->size
;
2265 end_pos
.charpos
= it
->end_charpos
;
2268 end_pos
.charpos
= XFASTINT (end
);
2270 if (STRINGP (it
->string
))
2271 compute_string_pos (&end_pos
, start_pos
, it
->string
);
2273 end_pos
.bytepos
= CHAR_TO_BYTE (end_pos
.charpos
);
2279 /* Set up IT from a single `display' sub-property value PROP. OBJECT
2280 is the object in which the `display' property was found. *POSITION
2281 is the position at which it was found.
2283 If PROP is a `space' or `image' sub-property, set *POSITION to the
2284 end position of the `display' property.
2286 Value is non-zero if a `space' or `image' property value was found. */
2289 handle_single_display_prop (it
, prop
, object
, position
)
2293 struct text_pos
*position
;
2296 int space_or_image_found_p
= 0;
2300 /* If PROP is a list of the form `(:when FORM VALUE)', FORM is
2301 evaluated. If the result is nil, VALUE is ignored. */
2303 if (CONSP (prop
) && EQ (XCAR (prop
), QCwhen
))
2315 if (!NILP (form
) && !EQ (form
, Qt
))
2317 struct gcpro gcpro1
;
2318 struct text_pos end_pos
, pt
;
2320 end_pos
= display_prop_end (it
, object
, *position
);
2323 /* Temporarily set point to the end position, and then evaluate
2324 the form. This makes `(eolp)' work as FORM. */
2326 BYTEPOS (pt
) = PT_BYTE
;
2327 TEMP_SET_PT_BOTH (CHARPOS (end_pos
), BYTEPOS (end_pos
));
2328 form
= eval_form (form
);
2329 TEMP_SET_PT_BOTH (CHARPOS (pt
), BYTEPOS (pt
));
2337 && EQ (XCAR (prop
), Qheight
)
2338 && CONSP (XCDR (prop
)))
2340 if (FRAME_TERMCAP_P (it
->f
) || FRAME_MSDOS_P (it
->f
))
2343 /* `(height HEIGHT)'. */
2344 it
->font_height
= XCAR (XCDR (prop
));
2345 if (!NILP (it
->font_height
))
2347 struct face
*face
= FACE_FROM_ID (it
->f
, it
->face_id
);
2348 int new_height
= -1;
2350 if (CONSP (it
->font_height
)
2351 && (EQ (XCAR (it
->font_height
), Qplus
)
2352 || EQ (XCAR (it
->font_height
), Qminus
))
2353 && CONSP (XCDR (it
->font_height
))
2354 && INTEGERP (XCAR (XCDR (it
->font_height
))))
2356 /* `(+ N)' or `(- N)' where N is an integer. */
2357 int steps
= XINT (XCAR (XCDR (it
->font_height
)));
2358 if (EQ (XCAR (it
->font_height
), Qplus
))
2360 it
->face_id
= smaller_face (it
->f
, it
->face_id
, steps
);
2362 else if (SYMBOLP (it
->font_height
))
2364 /* Call function with current height as argument.
2365 Value is the new height. */
2366 Lisp_Object form
, height
;
2367 struct gcpro gcpro1
;
2369 height
= face
->lface
[LFACE_HEIGHT_INDEX
];
2370 form
= Fcons (it
->font_height
, Fcons (height
, Qnil
));
2372 height
= eval_form (form
);
2373 if (NUMBERP (height
))
2374 new_height
= XFLOATINT (height
);
2377 else if (NUMBERP (it
->font_height
))
2379 /* Value is a multiple of the canonical char height. */
2382 face
= FACE_FROM_ID (it
->f
, DEFAULT_FACE_ID
);
2383 new_height
= (XFLOATINT (it
->font_height
)
2384 * XINT (face
->lface
[LFACE_HEIGHT_INDEX
]));
2388 /* Evaluate IT->font_height with `height' bound to the
2389 current specified height to get the new height. */
2391 int count
= specpdl_ptr
- specpdl
;
2393 specbind (Qheight
, face
->lface
[LFACE_HEIGHT_INDEX
]);
2394 value
= eval_form (it
->font_height
);
2395 unbind_to (count
, Qnil
);
2397 if (NUMBERP (value
))
2398 new_height
= XFLOATINT (value
);
2402 it
->face_id
= face_with_height (it
->f
, it
->face_id
, new_height
);
2405 else if (CONSP (prop
)
2406 && EQ (XCAR (prop
), Qspace_width
)
2407 && CONSP (XCDR (prop
)))
2409 /* `(space_width WIDTH)'. */
2410 if (FRAME_TERMCAP_P (it
->f
) || FRAME_MSDOS_P (it
->f
))
2413 value
= XCAR (XCDR (prop
));
2414 if (NUMBERP (value
) && XFLOATINT (value
) > 0)
2415 it
->space_width
= value
;
2417 else if (CONSP (prop
)
2418 && EQ (XCAR (prop
), Qraise
)
2419 && CONSP (XCDR (prop
)))
2421 #ifdef HAVE_WINDOW_SYSTEM
2422 /* `(raise FACTOR)'. */
2423 if (FRAME_TERMCAP_P (it
->f
) || FRAME_MSDOS_P (it
->f
))
2426 value
= XCAR (XCDR (prop
));
2427 if (NUMBERP (value
))
2429 struct face
*face
= FACE_FROM_ID (it
->f
, it
->face_id
);
2430 it
->voffset
= - (XFLOATINT (value
)
2431 * (face
->font
->ascent
+ face
->font
->descent
));
2433 #endif /* HAVE_WINDOW_SYSTEM */
2435 else if (!it
->string_from_display_prop_p
)
2437 /* `(left-margin VALUE)' or `(right-margin VALUE)
2438 or `(nil VALUE)' or VALUE. */
2439 Lisp_Object location
, value
;
2440 struct text_pos start_pos
;
2443 /* Characters having this form of property are not displayed, so
2444 we have to find the end of the property. */
2445 space_or_image_found_p
= 1;
2446 start_pos
= *position
;
2447 *position
= display_prop_end (it
, object
, start_pos
);
2449 /* Let's stop at the new position and assume that all
2450 text properties change there. */
2451 it
->stop_charpos
= position
->charpos
;
2454 && !EQ (XCAR (prop
), Qspace
)
2455 && !EQ (XCAR (prop
), Qimage
))
2457 location
= XCAR (prop
);
2458 value
= XCDR (prop
);
2466 #ifdef HAVE_WINDOW_SYSTEM
2467 if (FRAME_TERMCAP_P (it
->f
) || FRAME_MSDOS_P (it
->f
))
2468 valid_p
= STRINGP (value
);
2470 valid_p
= (STRINGP (value
)
2471 || (CONSP (value
) && EQ (XCAR (value
), Qspace
))
2472 || valid_image_p (value
));
2473 #else /* not HAVE_WINDOW_SYSTEM */
2474 valid_p
= STRINGP (value
);
2475 #endif /* not HAVE_WINDOW_SYSTEM */
2477 if ((EQ (location
, Qleft_margin
)
2478 || EQ (location
, Qright_margin
)
2482 /* Save current settings of IT so that we can restore them
2483 when we are finished with the glyph property value. */
2486 if (NILP (location
))
2487 it
->area
= TEXT_AREA
;
2488 else if (EQ (location
, Qleft_margin
))
2489 it
->area
= LEFT_MARGIN_AREA
;
2491 it
->area
= RIGHT_MARGIN_AREA
;
2493 if (STRINGP (value
))
2496 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
2497 it
->current
.overlay_string_index
= -1;
2498 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = 0;
2499 it
->end_charpos
= it
->string_nchars
2500 = XSTRING (it
->string
)->size
;
2501 it
->method
= next_element_from_string
;
2502 it
->stop_charpos
= 0;
2503 it
->string_from_display_prop_p
= 1;
2505 else if (CONSP (value
) && EQ (XCAR (value
), Qspace
))
2507 it
->method
= next_element_from_stretch
;
2509 it
->current
.pos
= it
->position
= start_pos
;
2511 #ifdef HAVE_WINDOW_SYSTEM
2514 it
->what
= IT_IMAGE
;
2515 it
->image_id
= lookup_image (it
->f
, value
);
2516 it
->position
= start_pos
;
2517 it
->object
= NILP (object
) ? it
->w
->buffer
: object
;
2518 it
->method
= next_element_from_image
;
2520 /* Say that we don't have consumed the characters with
2521 `display' property yet. The call to pop_it in
2522 set_iterator_to_next will clean this up. */
2523 *position
= start_pos
;
2525 #endif /* HAVE_WINDOW_SYSTEM */
2529 return space_or_image_found_p
;
2534 /***********************************************************************
2536 ***********************************************************************/
2538 /* The following structure is used to record overlay strings for
2539 later sorting in load_overlay_strings. */
2541 struct overlay_entry
2549 /* Set up iterator IT from overlay strings at its current position.
2550 Called from handle_stop. */
2552 static enum prop_handled
2553 handle_overlay_change (it
)
2556 /* Overlays are handled in current_buffer only. */
2557 if (STRINGP (it
->string
))
2558 return HANDLED_NORMALLY
;
2560 return (get_overlay_strings (it
)
2561 ? HANDLED_RECOMPUTE_PROPS
2562 : HANDLED_NORMALLY
);
2566 /* Set up the next overlay string for delivery by IT, if there is an
2567 overlay string to deliver. Called by set_iterator_to_next when the
2568 end of the current overlay string is reached. If there are more
2569 overlay strings to display, IT->string and
2570 IT->current.overlay_string_index are set appropriately here.
2571 Otherwise IT->string is set to nil. */
2574 next_overlay_string (it
)
2577 ++it
->current
.overlay_string_index
;
2578 if (it
->current
.overlay_string_index
== it
->n_overlay_strings
)
2580 /* No more overlay strings. Restore IT's settings to what
2581 they were before overlay strings were processed, and
2582 continue to deliver from current_buffer. */
2584 xassert (it
->stop_charpos
>= BEGV
2585 && it
->stop_charpos
<= it
->end_charpos
);
2587 it
->current
.overlay_string_index
= -1;
2588 SET_TEXT_POS (it
->current
.string_pos
, -1, -1);
2589 it
->n_overlay_strings
= 0;
2590 it
->method
= next_element_from_buffer
;
2594 /* There are more overlay strings to process. If
2595 IT->current.overlay_string_index has advanced to a position
2596 where we must load IT->overlay_strings with more strings, do
2598 int i
= it
->current
.overlay_string_index
% OVERLAY_STRING_CHUNK_SIZE
;
2600 if (it
->current
.overlay_string_index
&& i
== 0)
2601 load_overlay_strings (it
);
2603 /* Initialize IT to deliver display elements from the overlay
2605 it
->string
= it
->overlay_strings
[i
];
2606 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
2607 SET_TEXT_POS (it
->current
.string_pos
, 0, 0);
2608 it
->method
= next_element_from_string
;
2609 it
->stop_charpos
= 0;
2616 /* Compare two overlay_entry structures E1 and E2. Used as a
2617 comparison function for qsort in load_overlay_strings. Overlay
2618 strings for the same position are sorted so that
2620 1. All after-strings come in front of before-strings.
2622 2. Within after-strings, strings are sorted so that overlay strings
2623 from overlays with higher priorities come first.
2625 2. Within before-strings, strings are sorted so that overlay
2626 strings from overlays with higher priorities come last.
2628 Value is analogous to strcmp. */
2632 compare_overlay_entries (e1
, e2
)
2635 struct overlay_entry
*entry1
= (struct overlay_entry
*) e1
;
2636 struct overlay_entry
*entry2
= (struct overlay_entry
*) e2
;
2639 if (entry1
->after_string_p
!= entry2
->after_string_p
)
2640 /* Let after-strings appear in front of before-strings. */
2641 result
= entry1
->after_string_p
? -1 : 1;
2642 else if (entry1
->after_string_p
)
2643 /* After-strings sorted in order of decreasing priority. */
2644 result
= entry2
->priority
- entry1
->priority
;
2646 /* Before-strings sorted in order of increasing priority. */
2647 result
= entry1
->priority
- entry2
->priority
;
2653 /* Load the vector IT->overlay_strings with overlay strings from IT's
2654 current buffer position. Set IT->n_overlays to the total number of
2655 overlay strings found.
2657 Overlay strings are processed OVERLAY_STRING_CHUNK_SIZE strings at
2658 a time. On entry into load_overlay_strings,
2659 IT->current.overlay_string_index gives the number of overlay
2660 strings that have already been loaded by previous calls to this
2663 Overlay strings are sorted so that after-string strings come in
2664 front of before-string strings. Within before and after-strings,
2665 strings are sorted by overlay priority. See also function
2666 compare_overlay_entries. */
2669 load_overlay_strings (it
)
2672 extern Lisp_Object Qafter_string
, Qbefore_string
, Qwindow
, Qpriority
;
2673 Lisp_Object ov
, overlay
, window
, str
;
2677 struct overlay_entry
*entries
2678 = (struct overlay_entry
*) alloca (size
* sizeof *entries
);
2680 /* Append the overlay string STRING of overlay OVERLAY to vector
2681 `entries' which has size `size' and currently contains `n'
2682 elements. AFTER_P non-zero means STRING is an after-string of
2684 #define RECORD_OVERLAY_STRING(OVERLAY, STRING, AFTER_P) \
2687 Lisp_Object priority; \
2691 int new_size = 2 * size; \
2692 struct overlay_entry *old = entries; \
2694 (struct overlay_entry *) alloca (new_size \
2695 * sizeof *entries); \
2696 bcopy (old, entries, size * sizeof *entries); \
2700 entries[n].string = (STRING); \
2701 priority = Foverlay_get ((OVERLAY), Qpriority); \
2702 entries[n].priority \
2703 = INTEGERP (priority) ? XFASTINT (priority) : 0; \
2704 entries[n].after_string_p = (AFTER_P); \
2709 /* Process overlay before the overlay center. */
2710 for (ov
= current_buffer
->overlays_before
;
2714 overlay
= XCAR (ov
);
2715 xassert (OVERLAYP (overlay
));
2716 start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2717 end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2719 if (end
< IT_CHARPOS (*it
))
2722 /* Skip this overlay if it doesn't start or end at IT's current
2724 if (end
!= IT_CHARPOS (*it
) && start
!= IT_CHARPOS (*it
))
2727 /* Skip this overlay if it doesn't apply to IT->w. */
2728 window
= Foverlay_get (overlay
, Qwindow
);
2729 if (WINDOWP (window
) && XWINDOW (window
) != it
->w
)
2732 /* If overlay has a non-empty before-string, record it. */
2733 if (start
== IT_CHARPOS (*it
)
2734 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
))
2735 && XSTRING (str
)->size
)
2736 RECORD_OVERLAY_STRING (overlay
, str
, 0);
2738 /* If overlay has a non-empty after-string, record it. */
2739 if (end
== IT_CHARPOS (*it
)
2740 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
))
2741 && XSTRING (str
)->size
)
2742 RECORD_OVERLAY_STRING (overlay
, str
, 1);
2745 /* Process overlays after the overlay center. */
2746 for (ov
= current_buffer
->overlays_after
;
2750 overlay
= XCAR (ov
);
2751 xassert (OVERLAYP (overlay
));
2752 start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2753 end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2755 if (start
> IT_CHARPOS (*it
))
2758 /* Skip this overlay if it doesn't start or end at IT's current
2760 if (end
!= IT_CHARPOS (*it
) && start
!= IT_CHARPOS (*it
))
2763 /* Skip this overlay if it doesn't apply to IT->w. */
2764 window
= Foverlay_get (overlay
, Qwindow
);
2765 if (WINDOWP (window
) && XWINDOW (window
) != it
->w
)
2768 /* If overlay has a non-empty before-string, record it. */
2769 if (start
== IT_CHARPOS (*it
)
2770 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
))
2771 && XSTRING (str
)->size
)
2772 RECORD_OVERLAY_STRING (overlay
, str
, 0);
2774 /* If overlay has a non-empty after-string, record it. */
2775 if (end
== IT_CHARPOS (*it
)
2776 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
))
2777 && XSTRING (str
)->size
)
2778 RECORD_OVERLAY_STRING (overlay
, str
, 1);
2781 #undef RECORD_OVERLAY_STRING
2784 qsort (entries
, n
, sizeof *entries
, compare_overlay_entries
);
2786 /* Record the total number of strings to process. */
2787 it
->n_overlay_strings
= n
;
2789 /* IT->current.overlay_string_index is the number of overlay strings
2790 that have already been consumed by IT. Copy some of the
2791 remaining overlay strings to IT->overlay_strings. */
2793 j
= it
->current
.overlay_string_index
;
2794 while (i
< OVERLAY_STRING_CHUNK_SIZE
&& j
< n
)
2795 it
->overlay_strings
[i
++] = entries
[j
++].string
;
2801 /* Get the first chunk of overlay strings at IT's current buffer
2802 position. Value is non-zero if at least one overlay string was
2806 get_overlay_strings (it
)
2809 /* Get the first OVERLAY_STRING_CHUNK_SIZE overlay strings to
2810 process. This fills IT->overlay_strings with strings, and sets
2811 IT->n_overlay_strings to the total number of strings to process.
2812 IT->pos.overlay_string_index has to be set temporarily to zero
2813 because load_overlay_strings needs this; it must be set to -1
2814 when no overlay strings are found because a zero value would
2815 indicate a position in the first overlay string. */
2816 it
->current
.overlay_string_index
= 0;
2817 load_overlay_strings (it
);
2819 /* If we found overlay strings, set up IT to deliver display
2820 elements from the first one. Otherwise set up IT to deliver
2821 from current_buffer. */
2822 if (it
->n_overlay_strings
)
2824 /* Make sure we know settings in current_buffer, so that we can
2825 restore meaningful values when we're done with the overlay
2827 compute_stop_pos (it
);
2828 xassert (it
->face_id
>= 0);
2830 /* Save IT's settings. They are restored after all overlay
2831 strings have been processed. */
2832 xassert (it
->sp
== 0);
2835 /* Set up IT to deliver display elements from the first overlay
2837 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = 0;
2838 it
->stop_charpos
= 0;
2839 it
->string
= it
->overlay_strings
[0];
2840 it
->multibyte_p
= STRING_MULTIBYTE (it
->string
);
2841 xassert (STRINGP (it
->string
));
2842 it
->method
= next_element_from_string
;
2847 it
->current
.overlay_string_index
= -1;
2848 it
->method
= next_element_from_buffer
;
2853 /* Value is non-zero if we found at least one overlay string. */
2854 return STRINGP (it
->string
);
2859 /***********************************************************************
2860 Saving and restoring state
2861 ***********************************************************************/
2863 /* Save current settings of IT on IT->stack. Called, for example,
2864 before setting up IT for an overlay string, to be able to restore
2865 IT's settings to what they were after the overlay string has been
2872 struct iterator_stack_entry
*p
;
2874 xassert (it
->sp
< 2);
2875 p
= it
->stack
+ it
->sp
;
2877 p
->stop_charpos
= it
->stop_charpos
;
2878 xassert (it
->face_id
>= 0);
2879 p
->face_id
= it
->face_id
;
2880 p
->string
= it
->string
;
2881 p
->pos
= it
->current
;
2882 p
->end_charpos
= it
->end_charpos
;
2883 p
->string_nchars
= it
->string_nchars
;
2885 p
->multibyte_p
= it
->multibyte_p
;
2886 p
->space_width
= it
->space_width
;
2887 p
->font_height
= it
->font_height
;
2888 p
->voffset
= it
->voffset
;
2889 p
->string_from_display_prop_p
= it
->string_from_display_prop_p
;
2894 /* Restore IT's settings from IT->stack. Called, for example, when no
2895 more overlay strings must be processed, and we return to delivering
2896 display elements from a buffer, or when the end of a string from a
2897 `display' property is reached and we return to delivering display
2898 elements from an overlay string, or from a buffer. */
2904 struct iterator_stack_entry
*p
;
2906 xassert (it
->sp
> 0);
2908 p
= it
->stack
+ it
->sp
;
2909 it
->stop_charpos
= p
->stop_charpos
;
2910 it
->face_id
= p
->face_id
;
2911 it
->string
= p
->string
;
2912 it
->current
= p
->pos
;
2913 it
->end_charpos
= p
->end_charpos
;
2914 it
->string_nchars
= p
->string_nchars
;
2916 it
->multibyte_p
= p
->multibyte_p
;
2917 it
->space_width
= p
->space_width
;
2918 it
->font_height
= p
->font_height
;
2919 it
->voffset
= p
->voffset
;
2920 it
->string_from_display_prop_p
= p
->string_from_display_prop_p
;
2925 /***********************************************************************
2927 ***********************************************************************/
2929 /* Set IT's current position to the previous line start. */
2932 back_to_previous_line_start (it
)
2935 IT_CHARPOS (*it
) = find_next_newline_no_quit (IT_CHARPOS (*it
) - 1, -1);
2936 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (IT_CHARPOS (*it
));
2940 /* Set IT's current position to the next line start. */
2943 forward_to_next_line_start (it
)
2946 IT_CHARPOS (*it
) = find_next_newline_no_quit (IT_CHARPOS (*it
), 1);
2947 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (IT_CHARPOS (*it
));
2951 /* Set IT's current position to the previous visible line start. Skip
2952 invisible text that is so either due to text properties or due to
2953 selective display. Caution: this does not change IT->current_x and
2957 back_to_previous_visible_line_start (it
)
2962 /* Go back one newline if not on BEGV already. */
2963 if (IT_CHARPOS (*it
) > BEGV
)
2964 back_to_previous_line_start (it
);
2966 /* Move over lines that are invisible because of selective display
2967 or text properties. */
2968 while (IT_CHARPOS (*it
) > BEGV
2973 /* If selective > 0, then lines indented more than that values
2975 if (it
->selective
> 0
2976 && indented_beyond_p (IT_CHARPOS (*it
), IT_BYTEPOS (*it
),
2979 #ifdef USE_TEXT_PROPERTIES
2984 prop
= Fget_char_property (IT_CHARPOS (*it
), Qinvisible
, it
->window
);
2985 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
2988 #endif /* USE_TEXT_PROPERTIES */
2990 /* Back one more newline if the current one is invisible. */
2992 back_to_previous_line_start (it
);
2995 xassert (IT_CHARPOS (*it
) >= BEGV
);
2996 xassert (IT_CHARPOS (*it
) == BEGV
2997 || FETCH_BYTE (IT_BYTEPOS (*it
) - 1) == '\n');
3002 /* Reseat iterator IT at the previous visible line start. Skip
3003 invisible text that is so either due to text properties or due to
3004 selective display. At the end, update IT's overlay information,
3005 face information etc. */
3008 reseat_at_previous_visible_line_start (it
)
3011 back_to_previous_visible_line_start (it
);
3012 reseat (it
, it
->current
.pos
, 1);
3017 /* Reseat iterator IT on the next visible line start in the current
3018 buffer. ON_NEWLINE_P non-zero means position IT on the newline
3019 preceding the line start. Skip over invisible text that is so
3020 because of selective display. Compute faces, overlays etc at the
3021 new position. Note that this function does not skip over text that
3022 is invisible because of text properties. */
3025 reseat_at_next_visible_line_start (it
, on_newline_p
)
3029 /* Restore the buffer position when currently not delivering display
3030 elements from the current buffer. This is the case, for example,
3031 when called at the end of a truncated overlay string. */
3034 it
->method
= next_element_from_buffer
;
3036 /* Otherwise, scan_buffer would not work. */
3037 if (IT_CHARPOS (*it
) < ZV
)
3039 /* If on a newline, advance past it. Otherwise, find the next
3040 newline which automatically gives us the position following
3042 if (FETCH_BYTE (IT_BYTEPOS (*it
)) == '\n')
3048 forward_to_next_line_start (it
);
3050 /* We must either have reached the end of the buffer or end up
3052 xassert (IT_CHARPOS (*it
) == ZV
3053 || FETCH_BYTE (IT_BYTEPOS (*it
) - 1) == '\n');
3055 /* Skip over lines that are invisible because they are indented
3056 more than the value of IT->selective. */
3057 if (it
->selective
> 0)
3058 while (IT_CHARPOS (*it
) < ZV
3059 && indented_beyond_p (IT_CHARPOS (*it
), IT_BYTEPOS (*it
),
3061 forward_to_next_line_start (it
);
3063 /* Position on the newline if we should. */
3064 if (on_newline_p
&& IT_CHARPOS (*it
) > BEGV
)
3067 IT_BYTEPOS (*it
) = CHAR_TO_BYTE (IT_CHARPOS (*it
));
3070 /* Set the iterator there. The 0 as the last parameter of
3071 reseat means don't force a text property lookup. The lookup
3072 is then only done if we've skipped past the iterator's
3073 check_charpos'es. This optimization is important because
3074 text property lookups tend to be expensive. */
3075 reseat (it
, it
->current
.pos
, 0);
3083 /***********************************************************************
3084 Changing an iterator's position
3085 ***********************************************************************/
3087 /* Change IT's current position to POS in current_buffer. If FORCE_P
3088 is non-zero, always check for text properties at the new position.
3089 Otherwise, text properties are only looked up if POS >=
3090 IT->check_charpos of a property. */
3093 reseat (it
, pos
, force_p
)
3095 struct text_pos pos
;
3098 int original_pos
= IT_CHARPOS (*it
);
3100 reseat_1 (it
, pos
, 0);
3102 /* Determine where to check text properties. Avoid doing it
3103 where possible because text property lookup is very expensive. */
3105 || CHARPOS (pos
) > it
->stop_charpos
3106 || CHARPOS (pos
) < original_pos
)
3113 /* Change IT's buffer position to POS. SET_STOP_P non-zero means set
3114 IT->stop_pos to POS, also. */
3117 reseat_1 (it
, pos
, set_stop_p
)
3119 struct text_pos pos
;
3122 /* Don't call this function when scanning a C string. */
3123 xassert (it
->s
== NULL
);
3125 /* POS must be a reasonable value. */
3126 xassert (CHARPOS (pos
) >= BEGV
&& CHARPOS (pos
) <= ZV
);
3128 it
->current
.pos
= it
->position
= pos
;
3129 XSETBUFFER (it
->object
, current_buffer
);
3131 it
->current
.dpvec_index
= -1;
3132 it
->current
.overlay_string_index
= -1;
3133 IT_STRING_CHARPOS (*it
) = -1;
3134 IT_STRING_BYTEPOS (*it
) = -1;
3136 it
->method
= next_element_from_buffer
;
3140 it
->stop_charpos
= CHARPOS (pos
);
3144 /* Set up IT for displaying a string, starting at CHARPOS in window W.
3145 If S is non-null, it is a C string to iterate over. Otherwise,
3146 STRING gives a Lisp string to iterate over.
3148 If PRECISION > 0, don't return more then PRECISION number of
3149 characters from the string.
3151 If FIELD_WIDTH > 0, return padding spaces until FIELD_WIDTH
3152 characters have been returned. FIELD_WIDTH < 0 means an infinite
3155 MULTIBYTE = 0 means disable processing of multibyte characters,
3156 MULTIBYTE > 0 means enable it,
3157 MULTIBYTE < 0 means use IT->multibyte_p.
3159 IT must be initialized via a prior call to init_iterator before
3160 calling this function. */
3163 reseat_to_string (it
, s
, string
, charpos
, precision
, field_width
, multibyte
)
3168 int precision
, field_width
, multibyte
;
3170 /* No region in strings. */
3171 it
->region_beg_charpos
= it
->region_end_charpos
= -1;
3173 /* No text property checks performed by default, but see below. */
3174 it
->stop_charpos
= -1;
3176 /* Set iterator position and end position. */
3177 bzero (&it
->current
, sizeof it
->current
);
3178 it
->current
.overlay_string_index
= -1;
3179 it
->current
.dpvec_index
= -1;
3180 it
->charset
= CHARSET_ASCII
;
3181 xassert (charpos
>= 0);
3183 /* Use the setting of MULTIBYTE if specified. */
3185 it
->multibyte_p
= multibyte
> 0;
3189 xassert (STRINGP (string
));
3190 it
->string
= string
;
3192 it
->end_charpos
= it
->string_nchars
= XSTRING (string
)->size
;
3193 it
->method
= next_element_from_string
;
3194 it
->current
.string_pos
= string_pos (charpos
, string
);
3201 /* Note that we use IT->current.pos, not it->current.string_pos,
3202 for displaying C strings. */
3203 IT_STRING_CHARPOS (*it
) = IT_STRING_BYTEPOS (*it
) = -1;
3204 if (it
->multibyte_p
)
3206 it
->current
.pos
= c_string_pos (charpos
, s
, 1);
3207 it
->end_charpos
= it
->string_nchars
= number_of_chars (s
, 1);
3211 IT_CHARPOS (*it
) = IT_BYTEPOS (*it
) = charpos
;
3212 it
->end_charpos
= it
->string_nchars
= strlen (s
);
3215 it
->method
= next_element_from_c_string
;
3218 /* PRECISION > 0 means don't return more than PRECISION characters
3220 if (precision
> 0 && it
->end_charpos
- charpos
> precision
)
3221 it
->end_charpos
= it
->string_nchars
= charpos
+ precision
;
3223 /* FIELD_WIDTH > 0 means pad with spaces until FIELD_WIDTH
3224 characters have been returned. FIELD_WIDTH == 0 means don't pad,
3225 FIELD_WIDTH < 0 means infinite field width. This is useful for
3226 padding with `-' at the end of a mode line. */
3227 if (field_width
< 0)
3228 field_width
= INFINITY
;
3229 if (field_width
> it
->end_charpos
- charpos
)
3230 it
->end_charpos
= charpos
+ field_width
;
3232 /* Use the standard display table for displaying strings. */
3233 if (DISP_TABLE_P (Vstandard_display_table
))
3234 it
->dp
= XCHAR_TABLE (Vstandard_display_table
);
3236 it
->stop_charpos
= charpos
;
3242 /***********************************************************************
3244 ***********************************************************************/
3246 /* Load IT's display element fields with information about the next
3247 display element from the current position of IT. Value is zero if
3248 end of buffer (or C string) is reached. */
3251 get_next_display_element (it
)
3254 /* Non-zero means that we found an display element. Zero means that
3255 we hit the end of what we iterate over. Performance note: the
3256 function pointer `method' used here turns out to be faster than
3257 using a sequence of if-statements. */
3258 int success_p
= (*it
->method
) (it
);
3261 if (it
->what
== IT_CHARACTER
)
3263 /* Map via display table or translate control characters.
3264 IT->c, IT->len etc. have been set to the next character by
3265 the function call above. If we have a display table, and it
3266 contains an entry for IT->c, translate it. Don't do this if
3267 IT->c itself comes from a display table, otherwise we could
3268 end up in an infinite recursion. (An alternative could be to
3269 count the recursion depth of this function and signal an
3270 error when a certain maximum depth is reached.) Is it worth
3272 if (success_p
&& it
->dpvec
== NULL
)
3277 && (dv
= DISP_CHAR_VECTOR (it
->dp
, it
->c
),
3280 struct Lisp_Vector
*v
= XVECTOR (dv
);
3282 /* Return the first character from the display table
3283 entry, if not empty. If empty, don't display the
3284 current character. */
3287 it
->dpvec_char_len
= it
->len
;
3288 it
->dpvec
= v
->contents
;
3289 it
->dpend
= v
->contents
+ v
->size
;
3290 it
->current
.dpvec_index
= 0;
3291 it
->method
= next_element_from_display_vector
;
3294 success_p
= get_next_display_element (it
);
3297 /* Translate control characters into `\003' or `^C' form.
3298 Control characters coming from a display table entry are
3299 currently not translated because we use IT->dpvec to hold
3300 the translation. This could easily be changed but I
3301 don't believe that it is worth doing.
3303 Non-printable multibyte characters are also translated
3305 else if ((it
->c
< ' '
3306 && (it
->area
!= TEXT_AREA
3307 || (it
->c
!= '\n' && it
->c
!= '\t')))
3310 || !CHAR_PRINTABLE_P (it
->c
))
3312 /* IT->c is a control character which must be displayed
3313 either as '\003' or as `^C' where the '\\' and '^'
3314 can be defined in the display table. Fill
3315 IT->ctl_chars with glyphs for what we have to
3316 display. Then, set IT->dpvec to these glyphs. */
3319 if (it
->c
< 128 && it
->ctl_arrow_p
)
3321 /* Set IT->ctl_chars[0] to the glyph for `^'. */
3323 && INTEGERP (DISP_CTRL_GLYPH (it
->dp
))
3324 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (it
->dp
))))
3325 g
= XINT (DISP_CTRL_GLYPH (it
->dp
));
3327 g
= FAST_MAKE_GLYPH ('^', 0);
3328 XSETINT (it
->ctl_chars
[0], g
);
3330 g
= FAST_MAKE_GLYPH (it
->c
^ 0100, 0);
3331 XSETINT (it
->ctl_chars
[1], g
);
3333 /* Set up IT->dpvec and return first character from it. */
3334 it
->dpvec_char_len
= it
->len
;
3335 it
->dpvec
= it
->ctl_chars
;
3336 it
->dpend
= it
->dpvec
+ 2;
3337 it
->current
.dpvec_index
= 0;
3338 it
->method
= next_element_from_display_vector
;
3339 get_next_display_element (it
);
3343 unsigned char work
[4], *str
;
3344 int len
= CHAR_STRING (it
->c
, work
, str
);
3348 /* Set IT->ctl_chars[0] to the glyph for `\\'. */
3350 && INTEGERP (DISP_ESCAPE_GLYPH (it
->dp
))
3351 && GLYPH_CHAR_VALID_P (XFASTINT (DISP_ESCAPE_GLYPH (it
->dp
))))
3352 escape_glyph
= XFASTINT (DISP_ESCAPE_GLYPH (it
->dp
));
3354 escape_glyph
= FAST_MAKE_GLYPH ('\\', 0);
3356 for (i
= 0; i
< len
; i
++)
3358 XSETINT (it
->ctl_chars
[i
* 4], escape_glyph
);
3359 /* Insert three more glyphs into IT->ctl_chars for
3360 the octal display of the character. */
3361 g
= FAST_MAKE_GLYPH (((str
[i
] >> 6) & 7) + '0', 0);
3362 XSETINT (it
->ctl_chars
[i
* 4 + 1], g
);
3363 g
= FAST_MAKE_GLYPH (((str
[i
] >> 3) & 7) + '0', 0);
3364 XSETINT (it
->ctl_chars
[i
* 4 + 2], g
);
3365 g
= FAST_MAKE_GLYPH ((str
[i
] & 7) + '0', 0);
3366 XSETINT (it
->ctl_chars
[i
* 4 + 3], g
);
3369 /* Set up IT->dpvec and return the first character
3371 it
->dpvec_char_len
= it
->len
;
3372 it
->dpvec
= it
->ctl_chars
;
3373 it
->dpend
= it
->dpvec
+ len
* 4;
3374 it
->current
.dpvec_index
= 0;
3375 it
->method
= next_element_from_display_vector
;
3376 get_next_display_element (it
);
3381 /* Adjust face id if charset changes. There are no charset
3382 changes in unibyte text because Emacs' charsets are not
3383 applicable there. */
3386 && (charset
= CHAR_CHARSET (it
->c
),
3387 charset
!= it
->charset
))
3389 it
->charset
= charset
;
3390 it
->face_id
= FACE_FOR_CHARSET (it
->f
, it
->face_id
, charset
);
3394 /* Is this character the last one of a run of characters with
3395 box? If yes, set IT->end_of_box_run_p to 1. */
3402 it
->end_of_box_run_p
3403 = ((face_id
= face_after_it_pos (it
),
3404 face_id
!= it
->face_id
)
3405 && (face
= FACE_FROM_ID (it
->f
, face_id
),
3406 face
->box
== FACE_NO_BOX
));
3409 /* Value is 0 if end of buffer or string reached. */
3414 /* Move IT to the next display element.
3416 Functions get_next_display_element and set_iterator_to_next are
3417 separate because I find this arrangement easier to handle than a
3418 get_next_display_element function that also increments IT's
3419 position. The way it is we can first look at an iterator's current
3420 display element, decide whether it fits on a line, and if it does,
3421 increment the iterator position. The other way around we probably
3422 would either need a flag indicating whether the iterator has to be
3423 incremented the next time, or we would have to implement a
3424 decrement position function which would not be easy to write. */
3427 set_iterator_to_next (it
)
3430 if (it
->method
== next_element_from_buffer
)
3432 /* The current display element of IT is a character from
3433 current_buffer. Advance in the buffer, and maybe skip over
3434 invisible lines that are so because of selective display. */
3435 if (ITERATOR_AT_END_OF_LINE_P (it
))
3436 reseat_at_next_visible_line_start (it
, 0);
3439 xassert (it
->len
!= 0);
3440 IT_BYTEPOS (*it
) += it
->len
;
3441 IT_CHARPOS (*it
) += 1;
3442 xassert (IT_BYTEPOS (*it
) == CHAR_TO_BYTE (IT_CHARPOS (*it
)));
3445 else if (it
->method
== next_element_from_c_string
)
3447 /* Current display element of IT is from a C string. */
3448 IT_BYTEPOS (*it
) += it
->len
;
3449 IT_CHARPOS (*it
) += 1;
3451 else if (it
->method
== next_element_from_display_vector
)
3453 /* Current display element of IT is from a display table entry.
3454 Advance in the display table definition. Reset it to null if
3455 end reached, and continue with characters from buffers/
3457 ++it
->current
.dpvec_index
;
3459 /* Restore face and charset of the iterator to what they were
3460 before the display vector entry (these entries may contain
3461 faces, and of course characters of different charsets). */
3462 it
->face_id
= it
->saved_face_id
;
3463 it
->charset
= FACE_FROM_ID (it
->f
, it
->face_id
)->charset
;
3465 if (it
->dpvec
+ it
->current
.dpvec_index
== it
->dpend
)
3468 it
->method
= next_element_from_c_string
;
3469 else if (STRINGP (it
->string
))
3470 it
->method
= next_element_from_string
;
3472 it
->method
= next_element_from_buffer
;
3475 it
->current
.dpvec_index
= -1;
3477 /* Skip over characters which were displayed via IT->dpvec. */
3478 if (it
->dpvec_char_len
< 0)
3479 reseat_at_next_visible_line_start (it
, 1);
3480 else if (it
->dpvec_char_len
> 0)
3482 it
->len
= it
->dpvec_char_len
;
3483 set_iterator_to_next (it
);
3487 else if (it
->method
== next_element_from_string
)
3489 /* Current display element is a character from a Lisp string. */
3490 xassert (it
->s
== NULL
&& STRINGP (it
->string
));
3491 IT_STRING_BYTEPOS (*it
) += it
->len
;
3492 IT_STRING_CHARPOS (*it
) += 1;
3494 consider_string_end
:
3496 if (it
->current
.overlay_string_index
>= 0)
3498 /* IT->string is an overlay string. Advance to the
3499 next, if there is one. */
3500 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
)
3501 next_overlay_string (it
);
3505 /* IT->string is not an overlay string. If we reached
3506 its end, and there is something on IT->stack, proceed
3507 with what is on the stack. This can be either another
3508 string, this time an overlay string, or a buffer. */
3509 if (IT_STRING_CHARPOS (*it
) == XSTRING (it
->string
)->size
3513 if (!STRINGP (it
->string
))
3514 it
->method
= next_element_from_buffer
;
3518 else if (it
->method
== next_element_from_image
3519 || it
->method
== next_element_from_stretch
)
3521 /* The position etc with which we have to proceed are on
3522 the stack. The position may be at the end of a string,
3523 if the `display' property takes up the whole string. */
3526 if (STRINGP (it
->string
))
3528 it
->method
= next_element_from_string
;
3529 goto consider_string_end
;
3532 it
->method
= next_element_from_buffer
;
3535 /* There are no other methods defined, so this should be a bug. */
3538 /* Reset flags indicating start and end of a sequence of
3539 characters with box. */
3540 it
->start_of_box_run_p
= it
->end_of_box_run_p
= 0;
3542 xassert (it
->method
!= next_element_from_string
3543 || (STRINGP (it
->string
)
3544 && IT_STRING_CHARPOS (*it
) >= 0));
3548 /* Load IT's display element fields with information about the next
3549 display element which comes from a display table entry or from the
3550 result of translating a control character to one of the forms `^C'
3551 or `\003'. IT->dpvec holds the glyphs to return as characters. */
3554 next_element_from_display_vector (it
)
3558 xassert (it
->dpvec
&& it
->current
.dpvec_index
>= 0);
3560 /* Remember the current face id in case glyphs specify faces.
3561 IT's face is restored in set_iterator_to_next. */
3562 it
->saved_face_id
= it
->face_id
;
3564 if (INTEGERP (*it
->dpvec
)
3565 && GLYPH_CHAR_VALID_P (XFASTINT (*it
->dpvec
)))
3570 g
= XFASTINT (it
->dpvec
[it
->current
.dpvec_index
]);
3571 it
->c
= FAST_GLYPH_CHAR (g
);
3572 it
->len
= CHAR_LEN (it
->c
);
3574 /* The entry may contain a face id to use. Such a face id is
3575 the id of a Lisp face, not a realized face. A face id of
3576 zero means no face. */
3577 lface_id
= FAST_GLYPH_FACE (g
);
3580 int face_id
= ascii_face_of_lisp_face (it
->f
, lface_id
);
3583 it
->face_id
= face_id
;
3584 it
->charset
= CHARSET_ASCII
;
3589 /* Display table entry is invalid. Return a space. */
3590 it
->c
= ' ', it
->len
= 1;
3592 /* Don't change position and object of the iterator here. They are
3593 still the values of the character that had this display table
3594 entry or was translated, and that's what we want. */
3595 it
->what
= IT_CHARACTER
;
3600 /* Load IT with the next display element from Lisp string IT->string.
3601 IT->current.string_pos is the current position within the string.
3602 If IT->current.overlay_string_index >= 0, the Lisp string is an
3606 next_element_from_string (it
)
3609 struct text_pos position
;
3611 xassert (STRINGP (it
->string
));
3612 xassert (IT_STRING_CHARPOS (*it
) >= 0);
3613 position
= it
->current
.string_pos
;
3615 /* Time to check for invisible text? */
3616 if (IT_STRING_CHARPOS (*it
) < it
->end_charpos
3617 && IT_STRING_CHARPOS (*it
) == it
->stop_charpos
)
3621 /* Since a handler may have changed IT->method, we must
3623 return get_next_display_element (it
);
3626 if (it
->current
.overlay_string_index
>= 0)
3628 /* Get the next character from an overlay string. In overlay
3629 strings, There is no field width or padding with spaces to
3631 if (IT_STRING_CHARPOS (*it
) >= XSTRING (it
->string
)->size
)
3636 else if (STRING_MULTIBYTE (it
->string
))
3638 int remaining
= (STRING_BYTES (XSTRING (it
->string
))
3639 - IT_STRING_BYTEPOS (*it
));
3640 unsigned char *s
= (XSTRING (it
->string
)->data
3641 + IT_STRING_BYTEPOS (*it
));
3642 it
->c
= string_char_and_length (s
, remaining
, &it
->len
);
3646 it
->c
= XSTRING (it
->string
)->data
[IT_STRING_BYTEPOS (*it
)];
3652 /* Get the next character from a Lisp string that is not an
3653 overlay string. Such strings come from the mode line, for
3654 example. We may have to pad with spaces, or truncate the
3655 string. See also next_element_from_c_string. */
3656 if (IT_STRING_CHARPOS (*it
) >= it
->end_charpos
)
3661 else if (IT_STRING_CHARPOS (*it
) >= it
->string_nchars
)
3663 /* Pad with spaces. */
3664 it
->c
= ' ', it
->len
= 1;
3665 CHARPOS (position
) = BYTEPOS (position
) = -1;
3667 else if (STRING_MULTIBYTE (it
->string
))
3669 int maxlen
= (STRING_BYTES (XSTRING (it
->string
))
3670 - IT_STRING_BYTEPOS (*it
));
3671 unsigned char *s
= (XSTRING (it
->string
)->data
3672 + IT_STRING_BYTEPOS (*it
));
3673 it
->c
= string_char_and_length (s
, maxlen
, &it
->len
);
3677 it
->c
= XSTRING (it
->string
)->data
[IT_STRING_BYTEPOS (*it
)];
3682 /* Record what we have and where it came from. Note that we store a
3683 buffer position in IT->position although it could arguably be a
3685 it
->what
= IT_CHARACTER
;
3686 it
->object
= it
->string
;
3687 it
->position
= position
;
3692 /* Load IT with next display element from C string IT->s.
3693 IT->string_nchars is the maximum number of characters to return
3694 from the string. IT->end_charpos may be greater than
3695 IT->string_nchars when this function is called, in which case we
3696 may have to return padding spaces. Value is zero if end of string
3697 reached, including padding spaces. */
3700 next_element_from_c_string (it
)
3706 it
->what
= IT_CHARACTER
;
3707 BYTEPOS (it
->position
) = CHARPOS (it
->position
) = 0;
3710 /* IT's position can be greater IT->string_nchars in case a field
3711 width or precision has been specified when the iterator was
3713 if (IT_CHARPOS (*it
) >= it
->end_charpos
)
3715 /* End of the game. */
3719 else if (IT_CHARPOS (*it
) >= it
->string_nchars
)
3721 /* Pad with spaces. */
3722 it
->c
= ' ', it
->len
= 1;
3723 BYTEPOS (it
->position
) = CHARPOS (it
->position
) = -1;
3725 else if (it
->multibyte_p
)
3727 /* Implementation note: The calls to strlen apparently aren't a
3728 performance problem because there is no noticeable performance
3729 difference between Emacs running in unibyte or multibyte mode. */
3730 int maxlen
= strlen (it
->s
) - IT_BYTEPOS (*it
);
3731 it
->c
= string_char_and_length (it
->s
+ IT_BYTEPOS (*it
),
3735 it
->c
= it
->s
[IT_BYTEPOS (*it
)], it
->len
= 1;
3741 /* Set up IT to return characters from an ellipsis, if appropriate.
3742 The definition of the ellipsis glyphs may come from a display table
3743 entry. This function Fills IT with the first glyph from the
3744 ellipsis if an ellipsis is to be displayed. */
3747 next_element_from_ellipsis (it
)
3750 if (it
->dp
&& VECTORP (DISP_INVIS_VECTOR (it
->dp
)))
3752 /* Use the display table definition for `...'. Invalid glyphs
3753 will be handled by the method returning elements from dpvec. */
3754 struct Lisp_Vector
*v
= XVECTOR (DISP_INVIS_VECTOR (it
->dp
));
3755 it
->dpvec_char_len
= it
->len
;
3756 it
->dpvec
= v
->contents
;
3757 it
->dpend
= v
->contents
+ v
->size
;
3758 it
->current
.dpvec_index
= 0;
3759 it
->method
= next_element_from_display_vector
;
3760 get_next_display_element (it
);
3762 else if (it
->selective_display_ellipsis_p
)
3764 /* Use default `...' which is stored in default_invis_vector. */
3765 it
->dpvec_char_len
= it
->len
;
3766 it
->dpvec
= default_invis_vector
;
3767 it
->dpend
= default_invis_vector
+ 3;
3768 it
->current
.dpvec_index
= 0;
3769 it
->method
= next_element_from_display_vector
;
3770 get_next_display_element (it
);
3775 /* Deliver an image display element. The iterator IT is already
3776 filled with image information (done in handle_display_prop). Value
3781 next_element_from_image (it
)
3784 it
->what
= IT_IMAGE
;
3789 /* Fill iterator IT with next display element from a stretch glyph
3790 property. IT->object is the value of the text property. Value is
3794 next_element_from_stretch (it
)
3797 it
->what
= IT_STRETCH
;
3802 /* Load IT with the next display element from current_buffer. Value
3803 is zero if end of buffer reached. IT->stop_charpos is the next
3804 position at which to stop and check for text properties or buffer
3808 next_element_from_buffer (it
)
3813 /* Check this assumption, otherwise, we would never enter the
3814 if-statement, below. */
3815 xassert (IT_CHARPOS (*it
) >= BEGV
3816 && IT_CHARPOS (*it
) <= it
->stop_charpos
);
3818 if (IT_CHARPOS (*it
) >= it
->stop_charpos
)
3820 if (IT_CHARPOS (*it
) >= it
->end_charpos
)
3822 int overlay_strings_follow_p
;
3824 /* End of the game, except when overlay strings follow that
3825 haven't been returned yet. */
3826 if (it
->overlay_strings_at_end_processed_p
)
3827 overlay_strings_follow_p
= 0;
3830 it
->overlay_strings_at_end_processed_p
= 1;
3831 overlay_strings_follow_p
3832 = get_overlay_strings (it
);
3835 if (overlay_strings_follow_p
)
3836 success_p
= get_next_display_element (it
);
3840 it
->position
= it
->current
.pos
;
3847 return get_next_display_element (it
);
3852 /* No face changes, overlays etc. in sight, so just return a
3853 character from current_buffer. */
3856 /* Maybe run the redisplay end trigger hook. Performance note:
3857 This doesn't seem to cost measurable time. */
3858 if (it
->redisplay_end_trigger_charpos
3860 && IT_CHARPOS (*it
) >= it
->redisplay_end_trigger_charpos
)
3861 run_redisplay_end_trigger_hook (it
);
3863 /* Get the next character, maybe multibyte. */
3864 p
= BYTE_POS_ADDR (IT_BYTEPOS (*it
));
3865 if (it
->multibyte_p
)
3867 int maxlen
= ((IT_BYTEPOS (*it
) >= GPT_BYTE
? ZV_BYTE
: GPT_BYTE
)
3868 - IT_BYTEPOS (*it
));
3869 it
->c
= string_char_and_length (p
, maxlen
, &it
->len
);
3872 it
->c
= *p
, it
->len
= 1;
3874 /* Record what we have and where it came from. */
3875 it
->what
= IT_CHARACTER
;;
3876 it
->object
= it
->w
->buffer
;
3877 it
->position
= it
->current
.pos
;
3879 /* Normally we return the character found above, except when we
3880 really want to return an ellipsis for selective display. */
3885 /* A value of selective > 0 means hide lines indented more
3886 than that number of columns. */
3887 if (it
->selective
> 0
3888 && IT_CHARPOS (*it
) + 1 < ZV
3889 && indented_beyond_p (IT_CHARPOS (*it
) + 1,
3890 IT_BYTEPOS (*it
) + 1,
3893 next_element_from_ellipsis (it
);
3894 it
->dpvec_char_len
= -1;
3897 else if (it
->c
== '\r' && it
->selective
== -1)
3899 /* A value of selective == -1 means that everything from the
3900 CR to the end of the line is invisible, with maybe an
3901 ellipsis displayed for it. */
3902 next_element_from_ellipsis (it
);
3903 it
->dpvec_char_len
= -1;
3908 /* Value is zero if end of buffer reached. */
3909 xassert (!success_p
|| it
->len
> 0);
3914 /* Run the redisplay end trigger hook for IT. */
3917 run_redisplay_end_trigger_hook (it
)
3920 Lisp_Object args
[3];
3922 /* IT->glyph_row should be non-null, i.e. we should be actually
3923 displaying something, or otherwise we should not run the hook. */
3924 xassert (it
->glyph_row
);
3926 /* Set up hook arguments. */
3927 args
[0] = Qredisplay_end_trigger_functions
;
3928 args
[1] = it
->window
;
3929 XSETINT (args
[2], it
->redisplay_end_trigger_charpos
);
3930 it
->redisplay_end_trigger_charpos
= 0;
3932 /* Since we are *trying* to run these functions, don't try to run
3933 them again, even if they get an error. */
3934 it
->w
->redisplay_end_trigger
= Qnil
;
3935 Frun_hook_with_args (3, args
);
3937 /* Notice if it changed the face of the character we are on. */
3938 handle_face_prop (it
);
3943 /***********************************************************************
3944 Moving an iterator without producing glyphs
3945 ***********************************************************************/
3947 /* Move iterator IT to a specified buffer or X position within one
3948 line on the display without producing glyphs.
3950 Begin to skip at IT's current position. Skip to TO_CHARPOS or TO_X
3951 whichever is reached first.
3953 TO_CHARPOS <= 0 means no TO_CHARPOS is specified.
3955 TO_X < 0 means that no TO_X is specified. TO_X is normally a value
3956 0 <= TO_X <= IT->last_visible_x. This means in particular, that
3957 TO_X includes the amount by which a window is horizontally
3962 MOVE_POS_MATCH_OR_ZV
3963 - when TO_POS or ZV was reached.
3966 -when TO_X was reached before TO_POS or ZV were reached.
3969 - when we reached the end of the display area and the line must
3973 - when we reached the end of the display area and the line is
3977 - when we stopped at a line end, i.e. a newline or a CR and selective
3981 move_it_in_display_line_to (it
, to_charpos
, to_x
, op
)
3983 int to_charpos
, to_x
, op
;
3985 enum move_it_result result
= MOVE_UNDEFINED
;
3986 struct glyph_row
*saved_glyph_row
;
3988 /* Don't produce glyphs in produce_glyphs. */
3989 saved_glyph_row
= it
->glyph_row
;
3990 it
->glyph_row
= NULL
;
3996 /* Stop when ZV or TO_CHARPOS reached. */
3997 if (!get_next_display_element (it
)
3998 || ((op
& MOVE_TO_POS
) != 0
3999 && BUFFERP (it
->object
)
4000 && IT_CHARPOS (*it
) >= to_charpos
))
4002 result
= MOVE_POS_MATCH_OR_ZV
;
4006 /* The call to produce_glyphs will get the metrics of the
4007 display element IT is loaded with. We record in x the
4008 x-position before this display element in case it does not
4011 PRODUCE_GLYPHS (it
);
4013 if (it
->area
!= TEXT_AREA
)
4015 set_iterator_to_next (it
);
4019 /* The number of glyphs we get back in IT->nglyphs will normally
4020 be 1 except when IT->c is (i) a TAB, or (ii) a multi-glyph
4021 character on a terminal frame, or (iii) a line end. For the
4022 second case, IT->nglyphs - 1 padding glyphs will be present
4023 (on X frames, there is only one glyph produced for a
4024 composite character.
4026 The behavior implemented below means, for continuation lines,
4027 that as many spaces of a TAB as fit on the current line are
4028 displayed there. For terminal frames, as many glyphs of a
4029 multi-glyph character are displayed in the current line, too.
4030 This is what the old redisplay code did, and we keep it that
4031 way. Under X, the whole shape of a complex character must
4032 fit on the line or it will be completely displayed in the
4035 Note that both for tabs and padding glyphs, all glyphs have
4039 /* More than one glyph or glyph doesn't fit on line. All
4040 glyphs have the same width. */
4041 int single_glyph_width
= it
->pixel_width
/ it
->nglyphs
;
4044 for (i
= 0; i
< it
->nglyphs
; ++i
, x
= new_x
)
4046 new_x
= x
+ single_glyph_width
;
4048 /* We want to leave anything reaching TO_X to the caller. */
4049 if ((op
& MOVE_TO_X
) && new_x
> to_x
)
4052 result
= MOVE_X_REACHED
;
4055 else if (/* Lines are continued. */
4056 !it
->truncate_lines_p
4057 && (/* And glyph doesn't fit on the line. */
4058 new_x
> it
->last_visible_x
4059 /* Or it fits exactly and we're on a window
4061 || (new_x
== it
->last_visible_x
4062 && FRAME_WINDOW_P (it
->f
))))
4064 if (/* IT->hpos == 0 means the very first glyph
4065 doesn't fit on the line, e.g. a wide image. */
4067 || (new_x
== it
->last_visible_x
4068 && FRAME_WINDOW_P (it
->f
)))
4071 it
->current_x
= new_x
;
4072 if (i
== it
->nglyphs
- 1)
4073 set_iterator_to_next (it
);
4078 result
= MOVE_LINE_CONTINUED
;
4081 else if (new_x
> it
->first_visible_x
)
4083 /* Glyph is visible. Increment number of glyphs that
4084 would be displayed. */
4089 /* Glyph is completely off the left margin of the display
4090 area. Nothing to do. */
4094 if (result
!= MOVE_UNDEFINED
)
4097 else if ((op
& MOVE_TO_X
) && it
->current_x
>= to_x
)
4099 /* Stop when TO_X specified and reached. This check is
4100 necessary here because of lines consisting of a line end,
4101 only. The line end will not produce any glyphs and we
4102 would never get MOVE_X_REACHED. */
4103 xassert (it
->nglyphs
== 0);
4104 result
= MOVE_X_REACHED
;
4108 /* Is this a line end? If yes, we're done. */
4109 if (ITERATOR_AT_END_OF_LINE_P (it
))
4111 result
= MOVE_NEWLINE_OR_CR
;
4115 /* The current display element has been consumed. Advance
4117 set_iterator_to_next (it
);
4119 /* Stop if lines are truncated and IT's current x-position is
4120 past the right edge of the window now. */
4121 if (it
->truncate_lines_p
4122 && it
->current_x
>= it
->last_visible_x
)
4124 result
= MOVE_LINE_TRUNCATED
;
4129 /* Restore the iterator settings altered at the beginning of this
4131 it
->glyph_row
= saved_glyph_row
;
4136 /* Move IT forward to a specified buffer position TO_CHARPOS, TO_X,
4137 TO_Y, TO_VPOS. OP is a bit-mask that specifies where to stop. See
4138 the description of enum move_operation_enum.
4140 If TO_CHARPOS is in invisible text, e.g. a truncated part of a
4141 screen line, this function will set IT to the next position >
4145 move_it_to (it
, to_charpos
, to_x
, to_y
, to_vpos
, op
)
4147 int to_charpos
, to_x
, to_y
, to_vpos
;
4150 enum move_it_result skip
, skip2
= MOVE_X_REACHED
;
4155 if (op
& MOVE_TO_VPOS
)
4157 /* If no TO_CHARPOS and no TO_X specified, stop at the
4158 start of the line TO_VPOS. */
4159 if ((op
& (MOVE_TO_X
| MOVE_TO_POS
)) == 0)
4161 if (it
->vpos
== to_vpos
)
4163 skip
= move_it_in_display_line_to (it
, -1, -1, 0);
4167 /* TO_VPOS >= 0 means stop at TO_X in the line at
4168 TO_VPOS, or at TO_POS, whichever comes first. */
4169 skip
= move_it_in_display_line_to (it
, to_charpos
, to_x
, op
);
4171 if (skip
== MOVE_POS_MATCH_OR_ZV
|| it
->vpos
== to_vpos
)
4173 else if (skip
== MOVE_X_REACHED
&& it
->vpos
!= to_vpos
)
4175 /* We have reached TO_X but not in the line we want. */
4176 skip
= move_it_in_display_line_to (it
, to_charpos
,
4178 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4183 else if (op
& MOVE_TO_Y
)
4185 struct it it_backup
;
4188 /* TO_Y specified means stop at TO_X in the line containing
4189 TO_Y---or at TO_CHARPOS if this is reached first. The
4190 problem is that we can't really tell whether the line
4191 contains TO_Y before we have completely scanned it, and
4192 this may skip past TO_X. What we do is to first scan to
4195 If TO_X is not specified, use a TO_X of zero. The reason
4196 is to make the outcome of this function more predictable.
4197 If we didn't use TO_X == 0, we would stop at the end of
4198 the line which is probably not what a caller would expect
4200 skip
= move_it_in_display_line_to (it
, to_charpos
,
4204 | (op
& MOVE_TO_POS
)));
4206 /* If TO_CHARPOS is reached or ZV, we don't have to do more. */
4207 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4210 /* If TO_X was reached, we would like to know whether TO_Y
4211 is in the line. This can only be said if we know the
4212 total line height which requires us to scan the rest of
4215 if (skip
== MOVE_X_REACHED
)
4218 skip2
= move_it_in_display_line_to (it
, to_charpos
, -1,
4222 /* Now, decide whether TO_Y is in this line. */
4223 line_height
= it
->max_ascent
+ it
->max_descent
;
4225 if (to_y
>= it
->current_y
4226 && to_y
< it
->current_y
+ line_height
)
4228 if (skip
== MOVE_X_REACHED
)
4229 /* If TO_Y is in this line and TO_X was reached above,
4230 we scanned too far. We have to restore IT's settings
4231 to the ones before skipping. */
4235 else if (skip
== MOVE_X_REACHED
)
4238 if (skip
== MOVE_POS_MATCH_OR_ZV
)
4246 skip
= move_it_in_display_line_to (it
, to_charpos
, -1, MOVE_TO_POS
);
4250 case MOVE_POS_MATCH_OR_ZV
:
4253 case MOVE_NEWLINE_OR_CR
:
4254 set_iterator_to_next (it
);
4255 it
->continuation_lines_width
= 0;
4258 case MOVE_LINE_TRUNCATED
:
4259 it
->continuation_lines_width
= 0;
4260 reseat_at_next_visible_line_start (it
, 0);
4261 if ((op
& MOVE_TO_POS
) != 0
4262 && IT_CHARPOS (*it
) > to_charpos
)
4266 case MOVE_LINE_CONTINUED
:
4267 it
->continuation_lines_width
+= it
->current_x
;
4274 /* Reset/increment for the next run. */
4275 recenter_overlay_lists (current_buffer
, IT_CHARPOS (*it
));
4276 it
->current_x
= it
->hpos
= 0;
4277 it
->current_y
+= it
->max_ascent
+ it
->max_descent
;
4279 last_height
= it
->max_ascent
+ it
->max_descent
;
4280 last_max_ascent
= it
->max_ascent
;
4281 it
->max_ascent
= it
->max_descent
= 0;
4287 /* Move iterator IT backward by a specified y-distance DY, DY >= 0.
4289 If DY > 0, move IT backward at least that many pixels. DY = 0
4290 means move IT backward to the preceding line start or BEGV. This
4291 function may move over more than DY pixels if IT->current_y - DY
4292 ends up in the middle of a line; in this case IT->current_y will be
4293 set to the top of the line moved to. */
4296 move_it_vertically_backward (it
, dy
)
4300 int nlines
, h
, line_height
;
4302 int start_pos
= IT_CHARPOS (*it
);
4306 /* Estimate how many newlines we must move back. */
4307 nlines
= max (1, dy
/ CANON_Y_UNIT (it
->f
));
4309 /* Set the iterator's position that many lines back. */
4310 while (nlines
-- && IT_CHARPOS (*it
) > BEGV
)
4311 back_to_previous_visible_line_start (it
);
4313 /* Reseat the iterator here. When moving backward, we don't want
4314 reseat to skip forward over invisible text, set up the iterator
4315 to deliver from overlay strings at the new position etc. So,
4316 use reseat_1 here. */
4317 reseat_1 (it
, it
->current
.pos
, 1);
4319 /* We are now surely at a line start. */
4320 it
->current_x
= it
->hpos
= 0;
4322 /* Move forward and see what y-distance we moved. First move to the
4323 start of the next line so that we get its height. We need this
4324 height to be able to tell whether we reached the specified
4327 it2
.max_ascent
= it2
.max_descent
= 0;
4328 move_it_to (&it2
, start_pos
, -1, -1, it2
.vpos
+ 1,
4329 MOVE_TO_POS
| MOVE_TO_VPOS
);
4330 xassert (IT_CHARPOS (*it
) >= BEGV
);
4331 line_height
= it2
.max_ascent
+ it2
.max_descent
;
4332 move_it_to (&it2
, start_pos
, -1, -1, -1, MOVE_TO_POS
);
4333 xassert (IT_CHARPOS (*it
) >= BEGV
);
4334 h
= it2
.current_y
- it
->current_y
;
4335 nlines
= it2
.vpos
- it
->vpos
;
4337 /* Correct IT's y and vpos position. */
4343 /* DY == 0 means move to the start of the screen line. The
4344 value of nlines is > 0 if continuation lines were involved. */
4346 move_it_by_lines (it
, nlines
, 1);
4347 xassert (IT_CHARPOS (*it
) <= start_pos
);
4351 /* The y-position we try to reach. Note that h has been
4352 subtracted in front of the if-statement. */
4353 int target_y
= it
->current_y
+ h
- dy
;
4355 /* If we did not reach target_y, try to move further backward if
4356 we can. If we moved too far backward, try to move forward. */
4357 if (target_y
< it
->current_y
4358 && IT_CHARPOS (*it
) > BEGV
)
4360 move_it_vertically (it
, target_y
- it
->current_y
);
4361 xassert (IT_CHARPOS (*it
) >= BEGV
);
4363 else if (target_y
>= it
->current_y
+ line_height
4364 && IT_CHARPOS (*it
) < ZV
)
4366 move_it_vertically (it
, target_y
- (it
->current_y
+ line_height
));
4367 xassert (IT_CHARPOS (*it
) >= BEGV
);
4373 /* Move IT by a specified amount of pixel lines DY. DY negative means
4374 move backwards. DY = 0 means move to start of screen line. At the
4375 end, IT will be on the start of a screen line. */
4378 move_it_vertically (it
, dy
)
4383 move_it_vertically_backward (it
, -dy
);
4386 move_it_to (it
, ZV
, -1, it
->current_y
+ dy
, -1,
4387 MOVE_TO_POS
| MOVE_TO_Y
);
4389 /* If buffer ends in ZV without a newline, move to the start of
4390 the line to satisfy the post-condition. */
4391 if (IT_CHARPOS (*it
) == ZV
4392 && FETCH_BYTE (IT_BYTEPOS (*it
) - 1) != '\n')
4393 move_it_by_lines (it
, 0, 0);
4398 /* Return non-zero if some text between buffer positions START_CHARPOS
4399 and END_CHARPOS is invisible. IT->window is the window for text
4403 invisible_text_between_p (it
, start_charpos
, end_charpos
)
4405 int start_charpos
, end_charpos
;
4407 #ifdef USE_TEXT_PROPERTIES
4408 Lisp_Object prop
, limit
;
4409 int invisible_found_p
;
4411 xassert (it
!= NULL
&& start_charpos
<= end_charpos
);
4413 /* Is text at START invisible? */
4414 prop
= Fget_char_property (make_number (start_charpos
), Qinvisible
,
4416 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
4417 invisible_found_p
= 1;
4420 limit
= Fnext_single_property_change (make_number (start_charpos
),
4423 make_number (end_charpos
));
4424 invisible_found_p
= XFASTINT (limit
) < end_charpos
;
4427 return invisible_found_p
;
4429 #else /* not USE_TEXT_PROPERTIES */
4431 #endif /* not USE_TEXT_PROPERTIES */
4435 /* Move IT by a specified number DVPOS of screen lines down. DVPOS
4436 negative means move up. DVPOS == 0 means move to the start of the
4437 screen line. NEED_Y_P non-zero means calculate IT->current_y. If
4438 NEED_Y_P is zero, IT->current_y will be left unchanged.
4440 Further optimization ideas: If we would know that IT->f doesn't use
4441 a face with proportional font, we could be faster for
4442 truncate-lines nil. */
4445 move_it_by_lines (it
, dvpos
, need_y_p
)
4447 int dvpos
, need_y_p
;
4449 struct position pos
;
4451 if (!FRAME_WINDOW_P (it
->f
))
4453 struct text_pos textpos
;
4455 /* We can use vmotion on frames without proportional fonts. */
4456 pos
= *vmotion (IT_CHARPOS (*it
), dvpos
, it
->w
);
4457 SET_TEXT_POS (textpos
, pos
.bufpos
, pos
.bytepos
);
4458 reseat (it
, textpos
, 1);
4459 it
->vpos
+= pos
.vpos
;
4460 it
->current_y
+= pos
.vpos
;
4462 else if (dvpos
== 0)
4464 /* DVPOS == 0 means move to the start of the screen line. */
4465 move_it_vertically_backward (it
, 0);
4466 xassert (it
->current_x
== 0 && it
->hpos
== 0);
4470 /* If there are no continuation lines, and if there is no
4471 selective display, try the simple method of moving forward
4472 DVPOS newlines, then see where we are. */
4473 if (!need_y_p
&& it
->truncate_lines_p
&& it
->selective
== 0)
4475 int shortage
= 0, charpos
;
4477 if (FETCH_BYTE (IT_BYTEPOS (*it
) == '\n'))
4478 charpos
= IT_CHARPOS (*it
) + 1;
4480 charpos
= scan_buffer ('\n', IT_CHARPOS (*it
), 0, dvpos
,
4483 if (!invisible_text_between_p (it
, IT_CHARPOS (*it
), charpos
))
4485 struct text_pos pos
;
4486 CHARPOS (pos
) = charpos
;
4487 BYTEPOS (pos
) = CHAR_TO_BYTE (charpos
);
4488 reseat (it
, pos
, 1);
4489 it
->vpos
+= dvpos
- shortage
;
4490 it
->hpos
= it
->current_x
= 0;
4495 move_it_to (it
, -1, -1, -1, it
->vpos
+ dvpos
, MOVE_TO_VPOS
);
4500 int start_charpos
, i
;
4502 /* If there are no continuation lines, and if there is no
4503 selective display, try the simple method of moving backward
4505 if (!need_y_p
&& it
->truncate_lines_p
&& it
->selective
== 0)
4508 int charpos
= IT_CHARPOS (*it
);
4509 int bytepos
= IT_BYTEPOS (*it
);
4511 /* If in the middle of a line, go to its start. */
4512 if (charpos
> BEGV
&& FETCH_BYTE (bytepos
- 1) != '\n')
4514 charpos
= find_next_newline_no_quit (charpos
, -1);
4515 bytepos
= CHAR_TO_BYTE (charpos
);
4518 if (charpos
== BEGV
)
4520 struct text_pos pos
;
4521 CHARPOS (pos
) = charpos
;
4522 BYTEPOS (pos
) = bytepos
;
4523 reseat (it
, pos
, 1);
4524 it
->hpos
= it
->current_x
= 0;
4529 charpos
= scan_buffer ('\n', charpos
- 1, 0, dvpos
, &shortage
, 0);
4530 if (!invisible_text_between_p (it
, charpos
, IT_CHARPOS (*it
)))
4532 struct text_pos pos
;
4533 CHARPOS (pos
) = charpos
;
4534 BYTEPOS (pos
) = CHAR_TO_BYTE (charpos
);
4535 reseat (it
, pos
, 1);
4536 it
->vpos
+= dvpos
+ (shortage
? shortage
- 1 : 0);
4537 it
->hpos
= it
->current_x
= 0;
4543 /* Go back -DVPOS visible lines and reseat the iterator there. */
4544 start_charpos
= IT_CHARPOS (*it
);
4545 for (i
= -dvpos
; i
&& IT_CHARPOS (*it
) > BEGV
; --i
)
4546 back_to_previous_visible_line_start (it
);
4547 reseat (it
, it
->current
.pos
, 1);
4548 it
->current_x
= it
->hpos
= 0;
4550 /* Above call may have moved too far if continuation lines
4551 are involved. Scan forward and see if it did. */
4553 it2
.vpos
= it2
.current_y
= 0;
4554 move_it_to (&it2
, start_charpos
, -1, -1, -1, MOVE_TO_POS
);
4555 it
->vpos
-= it2
.vpos
;
4556 it
->current_y
-= it2
.current_y
;
4557 it
->current_x
= it
->hpos
= 0;
4559 /* If we moved too far, move IT some lines forward. */
4560 if (it2
.vpos
> -dvpos
)
4562 int delta
= it2
.vpos
+ dvpos
;
4563 move_it_to (it
, -1, -1, -1, it
->vpos
+ delta
, MOVE_TO_VPOS
);
4570 /***********************************************************************
4572 ***********************************************************************/
4575 /* Output a newline in the *Messages* buffer if "needs" one. */
4578 message_log_maybe_newline ()
4580 if (message_log_need_newline
)
4581 message_dolog ("", 0, 1, 0);
4585 /* Add a string M of length LEN to the message log, optionally
4586 terminated with a newline when NLFLAG is non-zero. MULTIBYTE, if
4587 nonzero, means interpret the contents of M as multibyte. This
4588 function calls low-level routines in order to bypass text property
4589 hooks, etc. which might not be safe to run. */
4592 message_dolog (m
, len
, nlflag
, multibyte
)
4594 int len
, nlflag
, multibyte
;
4596 if (!NILP (Vmessage_log_max
))
4598 struct buffer
*oldbuf
;
4599 Lisp_Object oldpoint
, oldbegv
, oldzv
;
4600 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
4601 int point_at_end
= 0;
4603 Lisp_Object old_deactivate_mark
, tem
;
4604 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4606 old_deactivate_mark
= Vdeactivate_mark
;
4607 oldbuf
= current_buffer
;
4608 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
4609 current_buffer
->undo_list
= Qt
;
4611 oldpoint
= Fpoint_marker ();
4612 oldbegv
= Fpoint_min_marker ();
4613 oldzv
= Fpoint_max_marker ();
4614 GCPRO4 (oldpoint
, oldbegv
, oldzv
, old_deactivate_mark
);
4622 BEGV_BYTE
= BEG_BYTE
;
4625 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
4627 /* Insert the string--maybe converting multibyte to single byte
4628 or vice versa, so that all the text fits the buffer. */
4630 && NILP (current_buffer
->enable_multibyte_characters
))
4633 unsigned char work
[1];
4635 /* Convert a multibyte string to single-byte
4636 for the *Message* buffer. */
4637 for (i
= 0; i
< len
; i
+= nbytes
)
4639 c
= string_char_and_length (m
+ i
, len
- i
, &nbytes
);
4640 work
[0] = (SINGLE_BYTE_CHAR_P (c
)
4642 : multibyte_char_to_unibyte (c
, Qnil
));
4643 insert_1_both (work
, 1, 1, 1, 0, 0);
4646 else if (! multibyte
4647 && ! NILP (current_buffer
->enable_multibyte_characters
))
4650 unsigned char *msg
= (unsigned char *) m
;
4651 unsigned char *str
, work
[4];
4652 /* Convert a single-byte string to multibyte
4653 for the *Message* buffer. */
4654 for (i
= 0; i
< len
; i
++)
4656 c
= unibyte_char_to_multibyte (msg
[i
]);
4657 nbytes
= CHAR_STRING (c
, work
, str
);
4658 insert_1_both (work
, 1, nbytes
, 1, 0, 0);
4662 insert_1 (m
, len
, 1, 0, 0);
4666 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
4667 insert_1 ("\n", 1, 1, 0, 0);
4669 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
4671 this_bol_byte
= PT_BYTE
;
4675 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
4677 prev_bol_byte
= PT_BYTE
;
4679 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
4680 this_bol
, this_bol_byte
);
4683 del_range_both (prev_bol
, prev_bol_byte
,
4684 this_bol
, this_bol_byte
, 0);
4690 /* If you change this format, don't forget to also
4691 change message_log_check_duplicate. */
4692 sprintf (dupstr
, " [%d times]", dup
);
4693 duplen
= strlen (dupstr
);
4694 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
4695 insert_1 (dupstr
, duplen
, 1, 0, 1);
4700 if (NATNUMP (Vmessage_log_max
))
4702 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
4703 -XFASTINT (Vmessage_log_max
) - 1, 0);
4704 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
4707 BEGV
= XMARKER (oldbegv
)->charpos
;
4708 BEGV_BYTE
= marker_byte_position (oldbegv
);
4717 ZV
= XMARKER (oldzv
)->charpos
;
4718 ZV_BYTE
= marker_byte_position (oldzv
);
4722 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
4724 /* We can't do Fgoto_char (oldpoint) because it will run some
4726 TEMP_SET_PT_BOTH (XMARKER (oldpoint
)->charpos
,
4727 XMARKER (oldpoint
)->bytepos
);
4730 free_marker (oldpoint
);
4731 free_marker (oldbegv
);
4732 free_marker (oldzv
);
4734 tem
= Fget_buffer_window (Fcurrent_buffer (), Qt
);
4735 set_buffer_internal (oldbuf
);
4737 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
4738 message_log_need_newline
= !nlflag
;
4739 Vdeactivate_mark
= old_deactivate_mark
;
4744 /* We are at the end of the buffer after just having inserted a newline.
4745 (Note: We depend on the fact we won't be crossing the gap.)
4746 Check to see if the most recent message looks a lot like the previous one.
4747 Return 0 if different, 1 if the new one should just replace it, or a
4748 value N > 1 if we should also append " [N times]". */
4751 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
4752 int prev_bol
, this_bol
;
4753 int prev_bol_byte
, this_bol_byte
;
4756 int len
= Z_BYTE
- 1 - this_bol_byte
;
4758 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
4759 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
4761 for (i
= 0; i
< len
; i
++)
4763 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
4772 if (*p1
++ == ' ' && *p1
++ == '[')
4775 while (*p1
>= '0' && *p1
<= '9')
4776 n
= n
* 10 + *p1
++ - '0';
4777 if (strncmp (p1
, " times]\n", 8) == 0)
4784 /* Display an echo area message M with a specified length of LEN
4785 chars. The string may include null characters. If M is 0, clear
4786 out any existing message, and let the mini-buffer text show through.
4788 The buffer M must continue to exist until after the echo area gets
4789 cleared or some other message gets displayed there. This means do
4790 not pass text that is stored in a Lisp string; do not pass text in
4791 a buffer that was alloca'd. */
4794 message2 (m
, len
, multibyte
)
4799 /* First flush out any partial line written with print. */
4800 message_log_maybe_newline ();
4802 message_dolog (m
, len
, 1, multibyte
);
4803 message2_nolog (m
, len
, multibyte
);
4807 /* The non-logging counterpart of message2. */
4810 message2_nolog (m
, len
, multibyte
)
4814 message_enable_multibyte
= multibyte
;
4818 if (noninteractive_need_newline
)
4819 putc ('\n', stderr
);
4820 noninteractive_need_newline
= 0;
4822 fwrite (m
, len
, 1, stderr
);
4823 if (cursor_in_echo_area
== 0)
4824 fprintf (stderr
, "\n");
4827 /* A null message buffer means that the frame hasn't really been
4828 initialized yet. Error messages get reported properly by
4829 cmd_error, so this must be just an informative message; toss it. */
4830 else if (INTERACTIVE
4831 && selected_frame
->glyphs_initialized_p
4832 && FRAME_MESSAGE_BUF (selected_frame
))
4834 Lisp_Object mini_window
;
4837 /* Get the frame containing the mini-buffer
4838 that the selected frame is using. */
4839 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
4840 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
4842 FRAME_SAMPLE_VISIBILITY (f
);
4843 if (FRAME_VISIBLE_P (selected_frame
)
4844 && ! FRAME_VISIBLE_P (f
))
4845 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
4849 set_message (m
, Qnil
, len
, multibyte
);
4850 if (minibuffer_auto_raise
)
4851 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
4854 clear_message (1, 1);
4856 do_pending_window_change (0);
4857 echo_area_display (1);
4858 do_pending_window_change (0);
4859 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
4860 (*frame_up_to_date_hook
) (f
);
4865 /* Display an echo area message M with a specified length of NBYTES
4866 bytes. The string may include null characters. If M is not a
4867 string, clear out any existing message, and let the mini-buffer
4868 text show through. */
4871 message3 (m
, nbytes
, multibyte
)
4876 struct gcpro gcpro1
;
4880 /* First flush out any partial line written with print. */
4881 message_log_maybe_newline ();
4883 message_dolog (XSTRING (m
)->data
, nbytes
, 1, multibyte
);
4884 message3_nolog (m
, nbytes
, multibyte
);
4890 /* The non-logging version of message3. */
4893 message3_nolog (m
, nbytes
, multibyte
)
4895 int nbytes
, multibyte
;
4897 message_enable_multibyte
= multibyte
;
4901 if (noninteractive_need_newline
)
4902 putc ('\n', stderr
);
4903 noninteractive_need_newline
= 0;
4905 fwrite (XSTRING (m
)->data
, nbytes
, 1, stderr
);
4906 if (cursor_in_echo_area
== 0)
4907 fprintf (stderr
, "\n");
4910 /* A null message buffer means that the frame hasn't really been
4911 initialized yet. Error messages get reported properly by
4912 cmd_error, so this must be just an informative message; toss it. */
4913 else if (INTERACTIVE
4914 && selected_frame
->glyphs_initialized_p
4915 && FRAME_MESSAGE_BUF (selected_frame
))
4917 Lisp_Object mini_window
;
4921 /* Get the frame containing the mini-buffer
4922 that the selected frame is using. */
4923 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
4924 frame
= XWINDOW (mini_window
)->frame
;
4927 FRAME_SAMPLE_VISIBILITY (f
);
4928 if (FRAME_VISIBLE_P (selected_frame
)
4929 && !FRAME_VISIBLE_P (f
))
4930 Fmake_frame_visible (frame
);
4932 if (STRINGP (m
) && XSTRING (m
)->size
)
4934 set_message (NULL
, m
, nbytes
, multibyte
);
4935 if (minibuffer_auto_raise
)
4936 Fraise_frame (frame
);
4939 clear_message (1, 1);
4941 do_pending_window_change (0);
4942 echo_area_display (1);
4943 do_pending_window_change (0);
4944 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
4945 (*frame_up_to_date_hook
) (f
);
4950 /* Display a null-terminated echo area message M. If M is 0, clear
4951 out any existing message, and let the mini-buffer text show through.
4953 The buffer M must continue to exist until after the echo area gets
4954 cleared or some other message gets displayed there. Do not pass
4955 text that is stored in a Lisp string. Do not pass text in a buffer
4956 that was alloca'd. */
4962 message2 (m
, (m
? strlen (m
) : 0), 0);
4966 /* The non-logging counterpart of message1. */
4972 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
4975 /* Display a message M which contains a single %s
4976 which gets replaced with STRING. */
4979 message_with_string (m
, string
, log
)
4988 if (noninteractive_need_newline
)
4989 putc ('\n', stderr
);
4990 noninteractive_need_newline
= 0;
4991 fprintf (stderr
, m
, XSTRING (string
)->data
);
4992 if (cursor_in_echo_area
== 0)
4993 fprintf (stderr
, "\n");
4997 else if (INTERACTIVE
)
4999 /* The frame whose minibuffer we're going to display the message on.
5000 It may be larger than the selected frame, so we need
5001 to use its buffer, not the selected frame's buffer. */
5002 Lisp_Object mini_window
;
5005 /* Get the frame containing the minibuffer
5006 that the selected frame is using. */
5007 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
5008 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
5010 /* A null message buffer means that the frame hasn't really been
5011 initialized yet. Error messages get reported properly by
5012 cmd_error, so this must be just an informative message; toss it. */
5013 if (FRAME_MESSAGE_BUF (f
))
5017 a
[0] = (char *) XSTRING (string
)->data
;
5019 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5020 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
5023 message2 (FRAME_MESSAGE_BUF (f
), len
,
5024 STRING_MULTIBYTE (string
));
5026 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
5027 STRING_MULTIBYTE (string
));
5029 /* Print should start at the beginning of the message
5030 buffer next time. */
5031 message_buf_print
= 0;
5037 /* Dump an informative message to the minibuf. If M is 0, clear out
5038 any existing message, and let the mini-buffer text show through. */
5042 message (m
, a1
, a2
, a3
)
5044 EMACS_INT a1
, a2
, a3
;
5050 if (noninteractive_need_newline
)
5051 putc ('\n', stderr
);
5052 noninteractive_need_newline
= 0;
5053 fprintf (stderr
, m
, a1
, a2
, a3
);
5054 if (cursor_in_echo_area
== 0)
5055 fprintf (stderr
, "\n");
5059 else if (INTERACTIVE
)
5061 /* The frame whose mini-buffer we're going to display the message
5062 on. It may be larger than the selected frame, so we need to
5063 use its buffer, not the selected frame's buffer. */
5064 Lisp_Object mini_window
;
5067 /* Get the frame containing the mini-buffer
5068 that the selected frame is using. */
5069 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
5070 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
5072 /* A null message buffer means that the frame hasn't really been
5073 initialized yet. Error messages get reported properly by
5074 cmd_error, so this must be just an informative message; toss
5076 if (FRAME_MESSAGE_BUF (f
))
5087 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5088 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
5090 len
= doprnt (FRAME_MESSAGE_BUF (f
),
5091 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
5093 #endif /* NO_ARG_ARRAY */
5095 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
5100 /* Print should start at the beginning of the message
5101 buffer next time. */
5102 message_buf_print
= 0;
5108 /* The non-logging version of message. */
5111 message_nolog (m
, a1
, a2
, a3
)
5113 EMACS_INT a1
, a2
, a3
;
5115 Lisp_Object old_log_max
;
5116 old_log_max
= Vmessage_log_max
;
5117 Vmessage_log_max
= Qnil
;
5118 message (m
, a1
, a2
, a3
);
5119 Vmessage_log_max
= old_log_max
;
5123 /* Display the current message in the current mini-buffer. This is
5124 only called from error handlers in process.c, and is not time
5130 if (!NILP (echo_area_buffer
[0]))
5133 string
= Fcurrent_message ();
5134 message3 (string
, XSTRING (string
)->size
,
5135 !NILP (current_buffer
->enable_multibyte_characters
));
5140 /* Call FN with args A1..A5 with either the current or last displayed
5141 echo_area_buffer as current buffer.
5143 WHICH zero means use the current message buffer
5144 echo_area_buffer[0]. If that is nil, choose a suitable buffer
5145 from echo_buffer[] and clear it.
5147 WHICH > 0 means use echo_area_buffer[1]. If that is nil, choose a
5148 suitable buffer from echo_buffer[] and clear it.
5150 If WHICH < 0, set echo_area_buffer[1] to echo_area_buffer[0], so
5151 that the current message becomes the last displayed one, make
5152 choose a suitable buffer for echo_area_buffer[0], and clear it.
5154 Value is what FN returns. */
5157 with_echo_area_buffer (w
, which
, fn
, a1
, a2
, a3
, a4
, a5
)
5161 int a1
, a2
, a3
, a4
, a5
;
5164 int i
, this_one
, the_other
, clear_buffer_p
, rc
;
5165 int count
= specpdl_ptr
- specpdl
;
5167 /* If buffers aren't life, make new ones. */
5168 for (i
= 0; i
< 2; ++i
)
5169 if (!BUFFERP (echo_buffer
[i
])
5170 || NILP (XBUFFER (echo_buffer
[i
])->name
))
5173 sprintf (name
, " *Echo Area %d*", i
);
5174 echo_buffer
[i
] = Fget_buffer_create (build_string (name
));
5180 this_one
= 0, the_other
= 1;
5182 this_one
= 1, the_other
= 0;
5185 this_one
= 0, the_other
= 1;
5188 /* We need a fresh one in case the current echo buffer equals
5189 the one containing the last displayed echo area message. */
5190 if (!NILP (echo_area_buffer
[this_one
])
5191 && EQ (echo_area_buffer
[this_one
], echo_area_buffer
[the_other
]))
5192 echo_area_buffer
[this_one
] = Qnil
;
5196 /* Choose a suitable buffer from echo_buffer[] is we don't
5198 if (NILP (echo_area_buffer
[this_one
]))
5200 echo_area_buffer
[this_one
]
5201 = (EQ (echo_area_buffer
[the_other
], echo_buffer
[this_one
])
5202 ? echo_buffer
[the_other
]
5203 : echo_buffer
[this_one
]);
5207 buffer
= echo_area_buffer
[this_one
];
5209 record_unwind_protect (unwind_with_echo_area_buffer
,
5210 with_echo_area_buffer_unwind_data (w
));
5212 /* Make the echo area buffer current. Note that for display
5213 purposes, it is not necessary that the displayed window's buffer
5214 == current_buffer, except for text property lookup. So, let's
5215 only set that buffer temporarily here without doing a full
5216 Fset_window_buffer. We must also change w->pointm, though,
5217 because otherwise an assertions in unshow_buffer fails, and Emacs
5219 set_buffer_internal_1 (XBUFFER (buffer
));
5223 set_marker_both (w
->pointm
, buffer
, BEG
, BEG_BYTE
);
5225 current_buffer
->truncate_lines
= Qnil
;
5226 current_buffer
->undo_list
= Qt
;
5227 current_buffer
->read_only
= Qnil
;
5229 if (clear_buffer_p
&& Z
> BEG
)
5232 xassert (BEGV
>= BEG
);
5233 xassert (ZV
<= Z
&& ZV
>= BEGV
);
5235 rc
= fn (a1
, a2
, a3
, a4
, a5
);
5237 xassert (BEGV
>= BEG
);
5238 xassert (ZV
<= Z
&& ZV
>= BEGV
);
5240 unbind_to (count
, Qnil
);
5245 /* Save state that should be preserved around the call to the function
5246 FN called in with_echo_area_buffer. */
5249 with_echo_area_buffer_unwind_data (w
)
5255 /* Reduce consing by keeping one vector in
5256 Vwith_echo_area_save_vector. */
5257 vector
= Vwith_echo_area_save_vector
;
5258 Vwith_echo_area_save_vector
= Qnil
;
5261 vector
= Fmake_vector (make_number (7), Qnil
);
5263 XSETBUFFER (XVECTOR (vector
)->contents
[i
], current_buffer
); ++i
;
5264 XVECTOR (vector
)->contents
[i
++] = Vdeactivate_mark
;
5265 XVECTOR (vector
)->contents
[i
++] = make_number (windows_or_buffers_changed
);
5269 XSETWINDOW (XVECTOR (vector
)->contents
[i
], w
); ++i
;
5270 XVECTOR (vector
)->contents
[i
++] = w
->buffer
;
5271 XVECTOR (vector
)->contents
[i
++]
5272 = make_number (XMARKER (w
->pointm
)->charpos
);
5273 XVECTOR (vector
)->contents
[i
++]
5274 = make_number (XMARKER (w
->pointm
)->bytepos
);
5280 XVECTOR (vector
)->contents
[i
++] = Qnil
;
5283 xassert (i
== XVECTOR (vector
)->size
);
5288 /* Restore global state from VECTOR which was created by
5289 with_echo_area_buffer_unwind_data. */
5292 unwind_with_echo_area_buffer (vector
)
5297 set_buffer_internal_1 (XBUFFER (XVECTOR (vector
)->contents
[i
])); ++i
;
5298 Vdeactivate_mark
= XVECTOR (vector
)->contents
[i
]; ++i
;
5299 windows_or_buffers_changed
= XFASTINT (XVECTOR (vector
)->contents
[i
]); ++i
;
5301 if (WINDOWP (XVECTOR (vector
)->contents
[i
]))
5304 Lisp_Object buffer
, charpos
, bytepos
;
5306 w
= XWINDOW (XVECTOR (vector
)->contents
[i
]); ++i
;
5307 buffer
= XVECTOR (vector
)->contents
[i
]; ++i
;
5308 charpos
= XVECTOR (vector
)->contents
[i
]; ++i
;
5309 bytepos
= XVECTOR (vector
)->contents
[i
]; ++i
;
5312 set_marker_both (w
->pointm
, buffer
,
5313 XFASTINT (charpos
), XFASTINT (bytepos
));
5316 Vwith_echo_area_save_vector
= vector
;
5321 /* Set up the echo area for use by print functions. MULTIBYTE_P
5322 non-zero means we will print multibyte. */
5325 setup_echo_area_for_printing (multibyte_p
)
5328 if (!message_buf_print
)
5330 /* A message has been output since the last time we printed.
5331 Choose a fresh echo area buffer. */
5332 if (EQ (echo_area_buffer
[1], echo_buffer
[0]))
5333 echo_area_buffer
[0] = echo_buffer
[1];
5335 echo_area_buffer
[0] = echo_buffer
[0];
5337 /* Switch to that buffer and clear it. */
5338 set_buffer_internal (XBUFFER (echo_area_buffer
[0]));
5341 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
5343 /* Set up the buffer for the multibyteness we need. */
5345 != !NILP (current_buffer
->enable_multibyte_characters
))
5346 Fset_buffer_multibyte (multibyte_p
? Qt
: Qnil
);
5348 /* Raise the frame containing the echo area. */
5349 if (minibuffer_auto_raise
)
5351 Lisp_Object mini_window
;
5352 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
5353 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
5356 message_buf_print
= 1;
5358 else if (current_buffer
!= XBUFFER (echo_area_buffer
[0]))
5359 /* Someone switched buffers between print requests. */
5360 set_buffer_internal (XBUFFER (echo_area_buffer
[0]));
5364 /* Display an echo area message in window W. Value is non-zero if W's
5365 height is changed. If display_last_displayed_message_p is
5366 non-zero, display the message that was last displayed, otherwise
5367 display the current message. */
5370 display_echo_area (w
)
5373 int i
, no_message_p
, window_height_changed_p
;
5375 /* If there is no message, we must call display_echo_area_1
5376 nevertheless because it resizes the window. But we will have to
5377 reset the echo_area_buffer in question to nil at the end because
5378 with_echo_area_buffer will sets it to an empty buffer. */
5379 i
= display_last_displayed_message_p
? 1 : 0;
5380 no_message_p
= NILP (echo_area_buffer
[i
]);
5382 window_height_changed_p
5383 = with_echo_area_buffer (w
, display_last_displayed_message_p
,
5384 (int (*) ()) display_echo_area_1
, w
);
5387 echo_area_buffer
[i
] = Qnil
;
5389 return window_height_changed_p
;
5393 /* Helper for display_echo_area. Display the current buffer which
5394 contains the current echo area message in window W, a mini-window.
5395 Change the height of W so that all of the message is displayed.
5396 Value is non-zero if height of W was changed. */
5399 display_echo_area_1 (w
)
5403 struct frame
*f
= XFRAME (w
->frame
);
5404 struct text_pos start
;
5405 int window_height_changed_p
= 0;
5407 /* Do this before displaying, so that we have a large enough glyph
5408 matrix for the display. */
5409 window_height_changed_p
= resize_mini_window (w
);
5412 clear_glyph_matrix (w
->desired_matrix
);
5413 XSETWINDOW (window
, w
);
5414 SET_TEXT_POS (start
, BEG
, BEG_BYTE
);
5415 try_window (window
, start
);
5417 return window_height_changed_p
;
5421 /* Resize mini-window W to fit the size of its contents. Value is
5422 non-zero if the window height has been changed. */
5425 resize_mini_window (w
)
5428 struct frame
*f
= XFRAME (w
->frame
);
5429 int window_height_changed_p
= 0;
5431 xassert (MINI_WINDOW_P (w
));
5433 /* Nil means don't try to resize. */
5434 if (NILP (Vmax_mini_window_height
))
5437 if (!FRAME_MINIBUF_ONLY_P (f
))
5440 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5441 int total_height
= XFASTINT (root
->height
) + XFASTINT (w
->height
);
5442 int height
, max_height
;
5443 int unit
= CANON_Y_UNIT (f
);
5444 struct text_pos start
;
5446 init_iterator (&it
, w
, BEGV
, BEGV_BYTE
, NULL
, DEFAULT_FACE_ID
);
5448 /* Compute the max. number of lines specified by the user. */
5449 if (FLOATP (Vmax_mini_window_height
))
5450 max_height
= XFLOATINT (Vmax_mini_window_height
) * total_height
;
5451 else if (INTEGERP (Vmax_mini_window_height
))
5452 max_height
= XINT (Vmax_mini_window_height
);
5454 max_height
= total_height
/ 4;
5456 /* Correct that max. height if it's bogus. */
5457 max_height
= max (1, max_height
);
5458 max_height
= min (total_height
, max_height
);
5460 /* Find out the height of the text in the window. */
5461 move_it_to (&it
, ZV
, -1, -1, -1, MOVE_TO_POS
);
5462 height
= (unit
- 1 + it
.current_y
+ last_height
) / unit
;
5463 height
= max (1, height
);
5465 /* Compute a suitable window start. */
5466 if (height
> max_height
)
5468 height
= max_height
;
5469 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
5470 move_it_vertically_backward (&it
, (height
- 1) * unit
);
5471 start
= it
.current
.pos
;
5474 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5475 SET_MARKER_FROM_TEXT_POS (w
->start
, start
);
5477 /* Let it grow only, until we display an empty message, in which
5478 case the window shrinks again. */
5479 if (height
> XFASTINT (w
->height
)
5482 Lisp_Object old_selected_window
;
5484 freeze_window_starts (f
, height
> XFASTINT (w
->height
));
5485 old_selected_window
= selected_window
;
5486 XSETWINDOW (selected_window
, w
);
5487 change_window_height (height
- XFASTINT (w
->height
), 0);
5488 selected_window
= old_selected_window
;
5489 window_height_changed_p
= 1;
5493 return window_height_changed_p
;
5497 /* Value is the current message, a string, or nil if there is no
5505 if (NILP (echo_area_buffer
[0]))
5509 with_echo_area_buffer (0, 0, (int (*) ()) current_message_1
, &msg
);
5511 echo_area_buffer
[0] = Qnil
;
5519 current_message_1 (msg
)
5523 *msg
= make_buffer_string (BEG
, Z
, 1);
5530 /* Push the current message on Vmessage_stack for later restauration
5531 by restore_message. Value is non-zero if the current message isn't
5532 empty. This is a relatively infrequent operation, so it's not
5533 worth optimizing. */
5539 msg
= current_message ();
5540 Vmessage_stack
= Fcons (msg
, Vmessage_stack
);
5541 return STRINGP (msg
);
5545 /* Restore message display from the top of Vmessage_stack. */
5552 xassert (CONSP (Vmessage_stack
));
5553 msg
= XCAR (Vmessage_stack
);
5555 message3_nolog (msg
, STRING_BYTES (XSTRING (msg
)), STRING_MULTIBYTE (msg
));
5557 message3_nolog (msg
, 0, 0);
5561 /* Pop the top-most entry off Vmessage_stack. */
5566 xassert (CONSP (Vmessage_stack
));
5567 Vmessage_stack
= XCDR (Vmessage_stack
);
5571 /* Check that Vmessage_stack is nil. Called from emacs.c when Emacs
5572 exits. If the stack is not empty, we have a missing pop_message
5576 check_message_stack ()
5578 if (!NILP (Vmessage_stack
))
5583 /* Truncate to NCHARS what will be displayed in the echo area the next
5584 time we display it---but don't redisplay it now. */
5587 truncate_echo_area (nchars
)
5591 echo_area_buffer
[0] = Qnil
;
5592 /* A null message buffer means that the frame hasn't really been
5593 initialized yet. Error messages get reported properly by
5594 cmd_error, so this must be just an informative message; toss it. */
5595 else if (!noninteractive
5597 && FRAME_MESSAGE_BUF (selected_frame
)
5598 && !NILP (echo_area_buffer
[0]))
5599 with_echo_area_buffer (0, 0, (int (*) ()) truncate_message_1
, nchars
);
5603 /* Helper function for truncate_echo_area. Truncate the current
5604 message to at most NCHARS characters. */
5607 truncate_message_1 (nchars
)
5610 if (BEG
+ nchars
< Z
)
5611 del_range (BEG
+ nchars
, Z
);
5613 echo_area_buffer
[0] = Qnil
;
5618 /* Set the current message to a substring of S or STRING.
5620 If STRING is a Lisp string, set the message to the first NBYTES
5621 bytes from STRING. NBYTES zero means use the whole string. If
5622 STRING is multibyte, the message will be displayed multibyte.
5624 If S is not null, set the message to the first LEN bytes of S. LEN
5625 zero means use the whole string. MULTIBYTE_P non-zero means S is
5626 multibyte. Display the message multibyte in that case. */
5629 set_message (s
, string
, nbytes
, multibyte_p
)
5634 message_enable_multibyte
5635 = ((s
&& multibyte_p
)
5636 || (STRINGP (string
) && STRING_MULTIBYTE (string
)));
5638 with_echo_area_buffer (0, -1, (int (*) ()) set_message_1
,
5639 s
, string
, nbytes
, multibyte_p
);
5640 message_buf_print
= 0;
5644 /* Helper function for set_message. Arguments have the same meaning
5645 as there. This function is called with the echo area buffer being
5649 set_message_1 (s
, string
, nbytes
, multibyte_p
)
5652 int nbytes
, multibyte_p
;
5656 /* Change multibyteness of the echo buffer appropriately. */
5657 if (message_enable_multibyte
5658 != !NILP (current_buffer
->enable_multibyte_characters
))
5659 Fset_buffer_multibyte (message_enable_multibyte
? Qt
: Qnil
);
5661 /* Insert new message at BEG. */
5662 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
5664 if (STRINGP (string
))
5669 nbytes
= XSTRING (string
)->size_byte
;
5670 nchars
= string_byte_to_char (string
, nbytes
);
5672 /* This function takes care of single/multibyte conversion. We
5673 just have to ensure that the echo area buffer has the right
5674 setting of enable_multibyte_characters. */
5675 insert_from_string (string
, 0, 0, nchars
, nbytes
, 1);
5680 nbytes
= strlen (s
);
5682 if (multibyte_p
&& NILP (current_buffer
->enable_multibyte_characters
))
5684 /* Convert from multi-byte to single-byte. */
5686 unsigned char work
[1];
5688 /* Convert a multibyte string to single-byte. */
5689 for (i
= 0; i
< nbytes
; i
+= n
)
5691 c
= string_char_and_length (s
+ i
, nbytes
- i
, &n
);
5692 work
[0] = (SINGLE_BYTE_CHAR_P (c
)
5694 : multibyte_char_to_unibyte (c
, Qnil
));
5695 insert_1_both (work
, 1, 1, 1, 0, 0);
5698 else if (!multibyte_p
5699 && !NILP (current_buffer
->enable_multibyte_characters
))
5701 /* Convert from single-byte to multi-byte. */
5703 unsigned char *msg
= (unsigned char *) s
;
5704 unsigned char *str
, work
[4];
5706 /* Convert a single-byte string to multibyte. */
5707 for (i
= 0; i
< nbytes
; i
++)
5709 c
= unibyte_char_to_multibyte (msg
[i
]);
5710 n
= CHAR_STRING (c
, work
, str
);
5711 insert_1_both (work
, 1, n
, 1, 0, 0);
5715 insert_1 (s
, nbytes
, 1, 0, 0);
5722 /* Clear messages. CURRENT_P non-zero means clear the current
5723 message. LAST_DISPLAYED_P non-zero means clear the message
5727 clear_message (current_p
, last_displayed_p
)
5728 int current_p
, last_displayed_p
;
5731 echo_area_buffer
[0] = Qnil
;
5733 if (last_displayed_p
)
5734 echo_area_buffer
[1] = Qnil
;
5736 message_buf_print
= 0;
5739 /* Clear garbaged frames.
5741 This function is used where the old redisplay called
5742 redraw_garbaged_frames which in turn called redraw_frame which in
5743 turn called clear_frame. The call to clear_frame was a source of
5744 flickering. I believe a clear_frame is not necessary. It should
5745 suffice in the new redisplay to invalidate all current matrices,
5746 and ensure a complete redisplay of all windows. */
5749 clear_garbaged_frames ()
5753 Lisp_Object tail
, frame
;
5755 FOR_EACH_FRAME (tail
, frame
)
5757 struct frame
*f
= XFRAME (frame
);
5759 if (FRAME_VISIBLE_P (f
) && FRAME_GARBAGED_P (f
))
5761 clear_current_matrices (f
);
5767 ++windows_or_buffers_changed
;
5772 /* Redisplay the echo area of selected_frame. If UPDATE_FRAME_P is
5773 non-zero update selected_frame. Value is non-zero if the
5774 mini-windows height has been changed. */
5777 echo_area_display (update_frame_p
)
5780 Lisp_Object mini_window
;
5783 int window_height_changed_p
= 0;
5785 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
5786 w
= XWINDOW (mini_window
);
5787 f
= XFRAME (WINDOW_FRAME (w
));
5789 /* Don't display if frame is invisible or not yet initialized. */
5790 if (!FRAME_VISIBLE_P (f
) || !f
->glyphs_initialized_p
)
5793 /* When Emacs starts, selected_frame may be a visible terminal
5794 frame, even if we run under a window system. If we let this
5795 through, a message would be displayed on the terminal. */
5796 #ifdef HAVE_WINDOW_SYSTEM
5797 if (!inhibit_window_system
&& !FRAME_WINDOW_P (selected_frame
))
5799 #endif /* HAVE_WINDOW_SYSTEM */
5801 /* Redraw garbaged frames. */
5803 clear_garbaged_frames ();
5805 if (!NILP (echo_area_buffer
[0]) || minibuf_level
== 0)
5807 echo_area_window
= mini_window
;
5808 window_height_changed_p
= display_echo_area (w
);
5809 w
->must_be_updated_p
= 1;
5813 /* Not called from redisplay_internal. If we changed
5814 window configuration, we must redisplay thoroughly.
5815 Otherwise, we can do with updating what we displayed
5817 if (window_height_changed_p
)
5819 ++windows_or_buffers_changed
;
5820 ++update_mode_lines
;
5821 redisplay_internal (0);
5823 else if (FRAME_WINDOW_P (f
))
5825 update_single_window (w
, 1);
5826 rif
->flush_display (f
);
5829 update_frame (f
, 1, 1);
5832 else if (!EQ (mini_window
, selected_window
))
5833 windows_or_buffers_changed
++;
5835 /* Last displayed message is now the current message. */
5836 echo_area_buffer
[1] = echo_area_buffer
[0];
5838 /* Prevent redisplay optimization in redisplay_internal by resetting
5839 this_line_start_pos. This is done because the mini-buffer now
5840 displays the message instead of its buffer text. */
5841 if (EQ (mini_window
, selected_window
))
5842 CHARPOS (this_line_start_pos
) = 0;
5844 return window_height_changed_p
;
5849 /***********************************************************************
5851 ***********************************************************************/
5854 #ifdef HAVE_WINDOW_SYSTEM
5856 /* A buffer for constructing frame titles in it; allocated from the
5857 heap in init_xdisp and resized as needed in store_frame_title_char. */
5859 static char *frame_title_buf
;
5861 /* The buffer's end, and a current output position in it. */
5863 static char *frame_title_buf_end
;
5864 static char *frame_title_ptr
;
5867 /* Store a single character C for the frame title in frame_title_buf.
5868 Re-allocate frame_title_buf if necessary. */
5871 store_frame_title_char (c
)
5874 /* If output position has reached the end of the allocated buffer,
5875 double the buffer's size. */
5876 if (frame_title_ptr
== frame_title_buf_end
)
5878 int len
= frame_title_ptr
- frame_title_buf
;
5879 int new_size
= 2 * len
* sizeof *frame_title_buf
;
5880 frame_title_buf
= (char *) xrealloc (frame_title_buf
, new_size
);
5881 frame_title_buf_end
= frame_title_buf
+ new_size
;
5882 frame_title_ptr
= frame_title_buf
+ len
;
5885 *frame_title_ptr
++ = c
;
5889 /* Store part of a frame title in frame_title_buf, beginning at
5890 frame_title_ptr. STR is the string to store. Do not copy more
5891 than PRECISION number of bytes from STR; PRECISION <= 0 means copy
5892 the whole string. Pad with spaces until FIELD_WIDTH number of
5893 characters have been copied; FIELD_WIDTH <= 0 means don't pad.
5894 Called from display_mode_element when it is used to build a frame
5898 store_frame_title (str
, field_width
, precision
)
5900 int field_width
, precision
;
5904 /* Copy at most PRECISION chars from STR. */
5905 while ((precision
<= 0 || n
< precision
)
5908 store_frame_title_char (*str
++);
5912 /* Fill up with spaces until FIELD_WIDTH reached. */
5913 while (field_width
> 0
5916 store_frame_title_char (' ');
5924 /* Set the title of FRAME, if it has changed. The title format is
5925 Vicon_title_format if FRAME is iconified, otherwise it is
5926 frame_title_format. */
5929 x_consider_frame_title (frame
)
5932 struct frame
*f
= XFRAME (frame
);
5934 if (FRAME_WINDOW_P (f
)
5935 || FRAME_MINIBUF_ONLY_P (f
)
5936 || f
->explicit_name
)
5938 /* Do we have more than one visible frame on this X display? */
5941 struct buffer
*obuf
;
5945 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
5947 struct frame
*tf
= XFRAME (XCAR (tail
));
5950 && FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
5951 && !FRAME_MINIBUF_ONLY_P (tf
)
5952 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
5956 /* Set global variable indicating that multiple frames exist. */
5957 multiple_frames
= CONSP (tail
);
5959 /* Switch to the buffer of selected window of the frame. Set up
5960 frame_title_ptr so that display_mode_element will output into it;
5961 then display the title. */
5962 obuf
= current_buffer
;
5963 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
5964 fmt
= FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
;
5965 frame_title_ptr
= frame_title_buf
;
5966 init_iterator (&it
, XWINDOW (f
->selected_window
), -1, -1,
5967 NULL
, DEFAULT_FACE_ID
);
5968 len
= display_mode_element (&it
, 0, -1, -1, fmt
);
5969 frame_title_ptr
= NULL
;
5970 set_buffer_internal (obuf
);
5972 /* Set the title only if it's changed. This avoids consing in
5973 the common case where it hasn't. (If it turns out that we've
5974 already wasted too much time by walking through the list with
5975 display_mode_element, then we might need to optimize at a
5976 higher level than this.) */
5977 if (! STRINGP (f
->name
)
5978 || STRING_BYTES (XSTRING (f
->name
)) != len
5979 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
5980 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
5984 #else /* not HAVE_WINDOW_SYSTEM */
5986 #define frame_title_ptr ((char *)0)
5987 #define store_frame_title(str, mincol, maxcol) 0
5989 #endif /* not HAVE_WINDOW_SYSTEM */
5994 /***********************************************************************
5996 ***********************************************************************/
5999 /* Prepare for redisplay by updating menu-bar item lists when
6000 appropriate. This can call eval. */
6003 prepare_menu_bars ()
6006 struct gcpro gcpro1
, gcpro2
;
6008 struct frame
*tooltip_frame
;
6010 #ifdef HAVE_X_WINDOWS
6011 tooltip_frame
= tip_frame
;
6013 tooltip_frame
= NULL
;
6016 /* Update all frame titles based on their buffer names, etc. We do
6017 this before the menu bars so that the buffer-menu will show the
6018 up-to-date frame titles. */
6019 #ifdef HAVE_WINDOW_SYSTEM
6020 if (windows_or_buffers_changed
|| update_mode_lines
)
6022 Lisp_Object tail
, frame
;
6024 FOR_EACH_FRAME (tail
, frame
)
6027 if (f
!= tooltip_frame
6028 && (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
)))
6029 x_consider_frame_title (frame
);
6032 #endif /* HAVE_WINDOW_SYSTEM */
6034 /* Update the menu bar item lists, if appropriate. This has to be
6035 done before any actual redisplay or generation of display lines. */
6036 all_windows
= (update_mode_lines
6037 || buffer_shared
> 1
6038 || windows_or_buffers_changed
);
6041 Lisp_Object tail
, frame
;
6042 int count
= specpdl_ptr
- specpdl
;
6044 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6046 FOR_EACH_FRAME (tail
, frame
)
6050 /* Ignore tooltip frame. */
6051 if (f
== tooltip_frame
)
6054 /* If a window on this frame changed size, report that to
6055 the user and clear the size-change flag. */
6056 if (FRAME_WINDOW_SIZES_CHANGED (f
))
6058 Lisp_Object functions
;
6060 /* Clear flag first in case we get an error below. */
6061 FRAME_WINDOW_SIZES_CHANGED (f
) = 0;
6062 functions
= Vwindow_size_change_functions
;
6063 GCPRO2 (tail
, functions
);
6065 while (CONSP (functions
))
6067 call1 (XCAR (functions
), frame
);
6068 functions
= XCDR (functions
);
6074 update_menu_bar (f
, 0);
6075 #ifdef HAVE_WINDOW_SYSTEM
6076 update_tool_bar (f
, 0);
6081 unbind_to (count
, Qnil
);
6085 update_menu_bar (selected_frame
, 1);
6086 #ifdef HAVE_WINDOW_SYSTEM
6087 update_tool_bar (selected_frame
, 1);
6091 /* Motif needs this. See comment in xmenu.c. Turn it off when
6092 pending_menu_activation is not defined. */
6093 #ifdef USE_X_TOOLKIT
6094 pending_menu_activation
= 0;
6099 /* Update the menu bar item list for frame F. This has to be done
6100 before we start to fill in any display lines, because it can call
6103 If SAVE_MATCH_DATA is non-zero, we must save and restore it here. */
6106 update_menu_bar (f
, save_match_data
)
6108 int save_match_data
;
6111 register struct window
*w
;
6113 window
= FRAME_SELECTED_WINDOW (f
);
6114 w
= XWINDOW (window
);
6116 if (update_mode_lines
)
6117 w
->update_mode_line
= Qt
;
6119 if (FRAME_WINDOW_P (f
)
6121 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
6122 FRAME_EXTERNAL_MENU_BAR (f
)
6124 FRAME_MENU_BAR_LINES (f
) > 0
6126 : FRAME_MENU_BAR_LINES (f
) > 0)
6128 /* If the user has switched buffers or windows, we need to
6129 recompute to reflect the new bindings. But we'll
6130 recompute when update_mode_lines is set too; that means
6131 that people can use force-mode-line-update to request
6132 that the menu bar be recomputed. The adverse effect on
6133 the rest of the redisplay algorithm is about the same as
6134 windows_or_buffers_changed anyway. */
6135 if (windows_or_buffers_changed
6136 || !NILP (w
->update_mode_line
)
6137 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
6138 < BUF_MODIFF (XBUFFER (w
->buffer
)))
6139 != !NILP (w
->last_had_star
))
6140 || ((!NILP (Vtransient_mark_mode
)
6141 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
6142 != !NILP (w
->region_showing
)))
6144 struct buffer
*prev
= current_buffer
;
6145 int count
= specpdl_ptr
- specpdl
;
6147 set_buffer_internal_1 (XBUFFER (w
->buffer
));
6148 if (save_match_data
)
6149 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6150 if (NILP (Voverriding_local_map_menu_flag
))
6152 specbind (Qoverriding_terminal_local_map
, Qnil
);
6153 specbind (Qoverriding_local_map
, Qnil
);
6156 /* Run the Lucid hook. */
6157 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
6159 /* If it has changed current-menubar from previous value,
6160 really recompute the menu-bar from the value. */
6161 if (! NILP (Vlucid_menu_bar_dirty_flag
))
6162 call0 (Qrecompute_lucid_menubar
);
6164 safe_run_hooks (Qmenu_bar_update_hook
);
6165 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
6167 /* Redisplay the menu bar in case we changed it. */
6168 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
6169 if (FRAME_WINDOW_P (f
))
6170 set_frame_menubar (f
, 0, 0);
6172 /* On a terminal screen, the menu bar is an ordinary screen
6173 line, and this makes it get updated. */
6174 w
->update_mode_line
= Qt
;
6175 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
6176 /* In the non-toolkit version, the menu bar is an ordinary screen
6177 line, and this makes it get updated. */
6178 w
->update_mode_line
= Qt
;
6179 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
6181 unbind_to (count
, Qnil
);
6182 set_buffer_internal_1 (prev
);
6189 /***********************************************************************
6191 ***********************************************************************/
6193 #ifdef HAVE_WINDOW_SYSTEM
6195 /* Update the tool-bar item list for frame F. This has to be done
6196 before we start to fill in any display lines. Called from
6197 prepare_menu_bars. If SAVE_MATCH_DATA is non-zero, we must save
6198 and restore it here. */
6201 update_tool_bar (f
, save_match_data
)
6203 int save_match_data
;
6205 if (WINDOWP (f
->tool_bar_window
)
6206 && XFASTINT (XWINDOW (f
->tool_bar_window
)->height
) > 0)
6211 window
= FRAME_SELECTED_WINDOW (f
);
6212 w
= XWINDOW (window
);
6214 /* If the user has switched buffers or windows, we need to
6215 recompute to reflect the new bindings. But we'll
6216 recompute when update_mode_lines is set too; that means
6217 that people can use force-mode-line-update to request
6218 that the menu bar be recomputed. The adverse effect on
6219 the rest of the redisplay algorithm is about the same as
6220 windows_or_buffers_changed anyway. */
6221 if (windows_or_buffers_changed
6222 || !NILP (w
->update_mode_line
)
6223 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
6224 < BUF_MODIFF (XBUFFER (w
->buffer
)))
6225 != !NILP (w
->last_had_star
))
6226 || ((!NILP (Vtransient_mark_mode
)
6227 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
6228 != !NILP (w
->region_showing
)))
6230 struct buffer
*prev
= current_buffer
;
6231 int count
= specpdl_ptr
- specpdl
;
6233 /* Set current_buffer to the buffer of the selected
6234 window of the frame, so that we get the right local
6236 set_buffer_internal_1 (XBUFFER (w
->buffer
));
6238 /* Save match data, if we must. */
6239 if (save_match_data
)
6240 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6242 /* Make sure that we don't accidentally use bogus keymaps. */
6243 if (NILP (Voverriding_local_map_menu_flag
))
6245 specbind (Qoverriding_terminal_local_map
, Qnil
);
6246 specbind (Qoverriding_local_map
, Qnil
);
6249 /* Build desired tool-bar items from keymaps. */
6250 f
->desired_tool_bar_items
6251 = tool_bar_items (f
->desired_tool_bar_items
,
6252 &f
->n_desired_tool_bar_items
);
6254 /* Redisplay the tool-bar in case we changed it. */
6255 w
->update_mode_line
= Qt
;
6257 unbind_to (count
, Qnil
);
6258 set_buffer_internal_1 (prev
);
6264 /* Set F->desired_tool_bar_string to a Lisp string representing frame
6265 F's desired tool-bar contents. F->desired_tool_bar_items must have
6266 been set up previously by calling prepare_menu_bars. */
6269 build_desired_tool_bar_string (f
)
6272 int i
, size
, size_needed
, string_idx
;
6273 struct gcpro gcpro1
, gcpro2
, gcpro3
;
6274 Lisp_Object image
, plist
, props
;
6276 image
= plist
= props
= Qnil
;
6277 GCPRO3 (image
, plist
, props
);
6279 /* Prepare F->desired_tool_bar_string. If we can reuse it, do so.
6280 Otherwise, make a new string. */
6282 /* The size of the string we might be able to reuse. */
6283 size
= (STRINGP (f
->desired_tool_bar_string
)
6284 ? XSTRING (f
->desired_tool_bar_string
)->size
6287 /* Each image in the string we build is preceded by a space,
6288 and there is a space at the end. */
6289 size_needed
= f
->n_desired_tool_bar_items
+ 1;
6291 /* Reuse f->desired_tool_bar_string, if possible. */
6292 if (size
< size_needed
)
6293 f
->desired_tool_bar_string
= Fmake_string (make_number (size_needed
), ' ');
6296 props
= list4 (Qdisplay
, Qnil
, Qmenu_item
, Qnil
);
6297 Fremove_text_properties (make_number (0), make_number (size
),
6298 props
, f
->desired_tool_bar_string
);
6301 /* Put a `display' property on the string for the images to display,
6302 put a `menu_item' property on tool-bar items with a value that
6303 is the index of the item in F's tool-bar item vector. */
6304 for (i
= 0, string_idx
= 0;
6305 i
< f
->n_desired_tool_bar_items
;
6306 ++i
, string_idx
+= 1)
6309 (XVECTOR (f->desired_tool_bar_items) \
6310 ->contents[i * TOOL_BAR_ITEM_NSLOTS + (IDX)])
6312 int enabled_p
= !NILP (PROP (TOOL_BAR_ITEM_ENABLED_P
));
6313 int selected_p
= !NILP (PROP (TOOL_BAR_ITEM_SELECTED_P
));
6315 extern Lisp_Object QCrelief
, QCmargin
, QCalgorithm
, Qimage
;
6316 extern Lisp_Object Qlaplace
;
6318 /* If image is a vector, choose the image according to the
6320 image
= PROP (TOOL_BAR_ITEM_IMAGES
);
6321 if (VECTORP (image
))
6323 enum tool_bar_item_image idx
;
6327 ? TOOL_BAR_IMAGE_ENABLED_SELECTED
6328 : TOOL_BAR_IMAGE_ENABLED_DESELECTED
);
6331 ? TOOL_BAR_IMAGE_DISABLED_SELECTED
6332 : TOOL_BAR_IMAGE_DISABLED_DESELECTED
);
6334 xassert (XVECTOR (image
)->size
>= idx
);
6335 image
= XVECTOR (image
)->contents
[idx
];
6338 /* Ignore invalid image specifications. */
6339 if (!valid_image_p (image
))
6342 /* Display the tool-bar button pressed, or depressed. */
6343 plist
= Fcopy_sequence (XCDR (image
));
6345 /* Compute margin and relief to draw. */
6346 relief
= tool_bar_button_relief
> 0 ? tool_bar_button_relief
: 3;
6347 margin
= relief
+ max (0, tool_bar_button_margin
);
6349 if (auto_raise_tool_bar_buttons_p
)
6351 /* Add a `:relief' property to the image spec if the item is
6355 plist
= Fplist_put (plist
, QCrelief
, make_number (-relief
));
6361 /* If image is selected, display it pressed, i.e. with a
6362 negative relief. If it's not selected, display it with a
6364 plist
= Fplist_put (plist
, QCrelief
,
6366 ? make_number (-relief
)
6367 : make_number (relief
)));
6371 /* Put a margin around the image. */
6373 plist
= Fplist_put (plist
, QCmargin
, make_number (margin
));
6375 /* If button is not enabled, make the image appear disabled by
6376 applying an appropriate algorithm to it. */
6378 plist
= Fplist_put (plist
, QCalgorithm
, Qlaplace
);
6380 /* Put a `display' text property on the string for the image to
6381 display. Put a `menu-item' property on the string that gives
6382 the start of this item's properties in the tool-bar items
6384 image
= Fcons (Qimage
, plist
);
6385 props
= list4 (Qdisplay
, image
,
6386 Qmenu_item
, make_number (i
* TOOL_BAR_ITEM_NSLOTS
)),
6387 Fadd_text_properties (make_number (string_idx
),
6388 make_number (string_idx
+ 1),
6389 props
, f
->desired_tool_bar_string
);
6397 /* Display one line of the tool-bar of frame IT->f. */
6400 display_tool_bar_line (it
)
6403 struct glyph_row
*row
= it
->glyph_row
;
6404 int max_x
= it
->last_visible_x
;
6407 prepare_desired_row (row
);
6408 row
->y
= it
->current_y
;
6410 while (it
->current_x
< max_x
)
6412 int x_before
, x
, n_glyphs_before
, i
, nglyphs
;
6414 /* Get the next display element. */
6415 if (!get_next_display_element (it
))
6418 /* Produce glyphs. */
6419 x_before
= it
->current_x
;
6420 n_glyphs_before
= it
->glyph_row
->used
[TEXT_AREA
];
6421 PRODUCE_GLYPHS (it
);
6423 nglyphs
= it
->glyph_row
->used
[TEXT_AREA
] - n_glyphs_before
;
6428 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
6430 if (x
+ glyph
->pixel_width
> max_x
)
6432 /* Glyph doesn't fit on line. */
6433 it
->glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
6439 x
+= glyph
->pixel_width
;
6443 /* Stop at line ends. */
6444 if (ITERATOR_AT_END_OF_LINE_P (it
))
6447 set_iterator_to_next (it
);
6452 row
->displays_text_p
= row
->used
[TEXT_AREA
] != 0;
6453 extend_face_to_end_of_line (it
);
6454 last
= row
->glyphs
[TEXT_AREA
] + row
->used
[TEXT_AREA
] - 1;
6455 last
->right_box_line_p
= 1;
6456 compute_line_metrics (it
);
6458 /* If line is empty, make it occupy the rest of the tool-bar. */
6459 if (!row
->displays_text_p
)
6461 row
->height
= row
->phys_height
= it
->last_visible_y
- row
->y
;
6462 row
->ascent
= row
->phys_ascent
= 0;
6465 row
->full_width_p
= 1;
6466 row
->continued_p
= 0;
6467 row
->truncated_on_left_p
= 0;
6468 row
->truncated_on_right_p
= 0;
6470 it
->current_x
= it
->hpos
= 0;
6471 it
->current_y
+= row
->height
;
6477 /* Value is the number of screen lines needed to make all tool-bar
6478 items of frame F visible. */
6481 tool_bar_lines_needed (f
)
6484 struct window
*w
= XWINDOW (f
->tool_bar_window
);
6487 /* Initialize an iterator for iteration over
6488 F->desired_tool_bar_string in the tool-bar window of frame F. */
6489 init_iterator (&it
, w
, -1, -1, w
->desired_matrix
->rows
, TOOL_BAR_FACE_ID
);
6490 it
.first_visible_x
= 0;
6491 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
6492 reseat_to_string (&it
, NULL
, f
->desired_tool_bar_string
, 0, 0, 0, -1);
6494 while (!ITERATOR_AT_END_P (&it
))
6496 it
.glyph_row
= w
->desired_matrix
->rows
;
6497 clear_glyph_row (it
.glyph_row
);
6498 display_tool_bar_line (&it
);
6501 return (it
.current_y
+ CANON_Y_UNIT (f
) - 1) / CANON_Y_UNIT (f
);
6505 /* Display the tool-bar of frame F. Value is non-zero if tool-bar's
6506 height should be changed. */
6509 redisplay_tool_bar (f
)
6514 struct glyph_row
*row
;
6515 int change_height_p
= 0;
6517 /* If frame hasn't a tool-bar window or if it is zero-height, don't
6518 do anything. This means you must start with tool-bar-lines
6519 non-zero to get the auto-sizing effect. Or in other words, you
6520 can turn off tool-bars by specifying tool-bar-lines zero. */
6521 if (!WINDOWP (f
->tool_bar_window
)
6522 || (w
= XWINDOW (f
->tool_bar_window
),
6523 XFASTINT (w
->height
) == 0))
6526 /* Set up an iterator for the tool-bar window. */
6527 init_iterator (&it
, w
, -1, -1, w
->desired_matrix
->rows
, TOOL_BAR_FACE_ID
);
6528 it
.first_visible_x
= 0;
6529 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
6532 /* Build a string that represents the contents of the tool-bar. */
6533 build_desired_tool_bar_string (f
);
6534 reseat_to_string (&it
, NULL
, f
->desired_tool_bar_string
, 0, 0, 0, -1);
6536 /* Display as many lines as needed to display all tool-bar items. */
6537 while (it
.current_y
< it
.last_visible_y
)
6538 display_tool_bar_line (&it
);
6540 /* It doesn't make much sense to try scrolling in the tool-bar
6541 window, so don't do it. */
6542 w
->desired_matrix
->no_scrolling_p
= 1;
6543 w
->must_be_updated_p
= 1;
6545 if (auto_resize_tool_bars_p
)
6549 /* If there are blank lines at the end, except for a partially
6550 visible blank line at the end that is smaller than
6551 CANON_Y_UNIT, change the tool-bar's height. */
6552 row
= it
.glyph_row
- 1;
6553 if (!row
->displays_text_p
6554 && row
->height
>= CANON_Y_UNIT (f
))
6555 change_height_p
= 1;
6557 /* If row displays tool-bar items, but is partially visible,
6558 change the tool-bar's height. */
6559 if (row
->displays_text_p
6560 && MATRIX_ROW_BOTTOM_Y (row
) > it
.last_visible_y
)
6561 change_height_p
= 1;
6563 /* Resize windows as needed by changing the `tool-bar-lines'
6566 && (nlines
= tool_bar_lines_needed (f
),
6567 nlines
!= XFASTINT (w
->height
)))
6569 extern Lisp_Object Qtool_bar_lines
;
6572 XSETFRAME (frame
, f
);
6573 clear_glyph_matrix (w
->desired_matrix
);
6574 Fmodify_frame_parameters (frame
,
6575 Fcons (Fcons (Qtool_bar_lines
,
6576 make_number (nlines
)),
6578 fonts_changed_p
= 1;
6582 return change_height_p
;
6586 /* Get information about the tool-bar item which is displayed in GLYPH
6587 on frame F. Return in *PROP_IDX the index where tool-bar item
6588 properties start in F->current_tool_bar_items. Value is zero if
6589 GLYPH doesn't display a tool-bar item. */
6592 tool_bar_item_info (f
, glyph
, prop_idx
)
6594 struct glyph
*glyph
;
6600 /* Get the text property `menu-item' at pos. The value of that
6601 property is the start index of this item's properties in
6602 F->current_tool_bar_items. */
6603 prop
= Fget_text_property (make_number (glyph
->charpos
),
6604 Qmenu_item
, f
->current_tool_bar_string
);
6605 if (INTEGERP (prop
))
6607 *prop_idx
= XINT (prop
);
6616 #endif /* HAVE_WINDOW_SYSTEM */
6620 /************************************************************************
6621 Horizontal scrolling
6622 ************************************************************************/
6624 static int hscroll_window_tree
P_ ((Lisp_Object
));
6625 static int hscroll_windows
P_ ((Lisp_Object
));
6627 /* For all leaf windows in the window tree rooted at WINDOW, set their
6628 hscroll value so that PT is (i) visible in the window, and (ii) so
6629 that it is not within a certain margin at the window's left and
6630 right border. Value is non-zero if any window's hscroll has been
6634 hscroll_window_tree (window
)
6637 int hscrolled_p
= 0;
6639 while (WINDOWP (window
))
6641 struct window
*w
= XWINDOW (window
);
6643 if (WINDOWP (w
->hchild
))
6644 hscrolled_p
|= hscroll_window_tree (w
->hchild
);
6645 else if (WINDOWP (w
->vchild
))
6646 hscrolled_p
|= hscroll_window_tree (w
->vchild
);
6647 else if (w
->cursor
.vpos
>= 0)
6649 int hscroll_margin
, text_area_x
, text_area_y
;
6650 int text_area_width
, text_area_height
;
6651 struct glyph_row
*cursor_row
= MATRIX_ROW (w
->current_matrix
,
6654 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
,
6655 &text_area_width
, &text_area_height
);
6657 /* Scroll when cursor is inside this scroll margin. */
6658 hscroll_margin
= 5 * CANON_X_UNIT (XFRAME (w
->frame
));
6660 if ((XFASTINT (w
->hscroll
)
6661 && w
->cursor
.x
< hscroll_margin
)
6662 || (cursor_row
->truncated_on_right_p
6663 && (w
->cursor
.x
> text_area_width
- hscroll_margin
)))
6667 struct buffer
*saved_current_buffer
;
6670 /* Find point in a display of infinite width. */
6671 saved_current_buffer
= current_buffer
;
6672 current_buffer
= XBUFFER (w
->buffer
);
6674 if (w
== XWINDOW (selected_window
))
6675 pt
= BUF_PT (current_buffer
);
6678 pt
= marker_position (w
->pointm
);
6679 pt
= max (BEGV
, pt
);
6683 /* Move iterator to pt starting at cursor_row->start in
6684 a line with infinite width. */
6685 init_to_row_start (&it
, w
, cursor_row
);
6686 it
.last_visible_x
= INFINITY
;
6687 move_it_in_display_line_to (&it
, pt
, -1, MOVE_TO_POS
);
6688 current_buffer
= saved_current_buffer
;
6690 /* Center cursor in window. */
6691 hscroll
= (max (0, it
.current_x
- text_area_width
/ 2)
6692 / CANON_X_UNIT (it
.f
));
6694 /* Don't call Fset_window_hscroll if value hasn't
6695 changed because it will prevent redisplay
6697 if (XFASTINT (w
->hscroll
) != hscroll
)
6699 Fset_window_hscroll (window
, make_number (hscroll
));
6708 /* Value is non-zero if hscroll of any leaf window has been changed. */
6713 /* Set hscroll so that cursor is visible and not inside horizontal
6714 scroll margins for all windows in the tree rooted at WINDOW. See
6715 also hscroll_window_tree above. Value is non-zero if any window's
6716 hscroll has been changed. If it has, desired matrices on the frame
6717 of WINDOW are cleared. */
6720 hscroll_windows (window
)
6723 int hscrolled_p
= hscroll_window_tree (window
);
6725 clear_desired_matrices (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
6731 /************************************************************************
6733 ************************************************************************/
6735 /* Variables holding some state of redisplay if GLYPH_DEBUG is defined
6736 to a non-zero value. This is sometimes handy to have in a debugger
6741 /* First and last unchanged row for try_window_id. */
6743 int debug_first_unchanged_at_end_vpos
;
6744 int debug_last_unchanged_at_beg_vpos
;
6746 /* Delta vpos and y. */
6748 int debug_dvpos
, debug_dy
;
6750 /* Delta in characters and bytes for try_window_id. */
6752 int debug_delta
, debug_delta_bytes
;
6754 /* Values of window_end_pos and window_end_vpos at the end of
6757 int debug_end_pos
, debug_end_vpos
;
6759 /* Append a string to W->desired_matrix->method. FMT is a printf
6760 format string. A1...A9 are a supplement for a variable-length
6761 argument list. If trace_redisplay_p is non-zero also printf the
6762 resulting string to stderr. */
6765 debug_method_add (w
, fmt
, a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
)
6768 int a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
;
6771 char *method
= w
->desired_matrix
->method
;
6772 int len
= strlen (method
);
6773 int size
= sizeof w
->desired_matrix
->method
;
6774 int remaining
= size
- len
- 1;
6776 sprintf (buffer
, fmt
, a1
, a2
, a3
, a4
, a5
, a6
, a7
, a8
, a9
);
6777 if (len
&& remaining
)
6783 strncpy (method
+ len
, buffer
, remaining
);
6785 if (trace_redisplay_p
)
6786 fprintf (stderr
, "%p (%s): %s\n",
6788 ((BUFFERP (w
->buffer
)
6789 && STRINGP (XBUFFER (w
->buffer
)->name
))
6790 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
6795 #endif /* GLYPH_DEBUG */
6798 /* This counter is used to clear the face cache every once in a while
6799 in redisplay_internal. It is incremented for each redisplay.
6800 Every CLEAR_FACE_CACHE_COUNT full redisplays, the face cache is
6803 #define CLEAR_FACE_CACHE_COUNT 10000
6804 static int clear_face_cache_count
;
6806 /* Record the previous terminal frame we displayed. */
6808 static struct frame
*previous_terminal_frame
;
6810 /* Non-zero while redisplay_internal is in progress. */
6815 /* Value is non-zero if all changes in window W, which displays
6816 current_buffer, are in the text between START and END. START is a
6817 buffer position, END is given as a distance from Z. Used in
6818 redisplay_internal for display optimization. */
6821 text_outside_line_unchanged_p (w
, start
, end
)
6825 int unchanged_p
= 1;
6827 /* If text or overlays have changed, see where. */
6828 if (XFASTINT (w
->last_modified
) < MODIFF
6829 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
)
6831 /* Gap in the line? */
6832 if (GPT
< start
|| Z
- GPT
< end
)
6835 /* Changes start in front of the line, or end after it? */
6837 && (BEG_UNCHANGED
< start
- 1
6838 || END_UNCHANGED
< end
))
6841 /* If selective display, can't optimize if changes start at the
6842 beginning of the line. */
6844 && INTEGERP (current_buffer
->selective_display
)
6845 && XINT (current_buffer
->selective_display
) > 0
6846 && (BEG_UNCHANGED
< start
|| GPT
<= start
))
6854 /* Do a frame update, taking possible shortcuts into account. This is
6855 the main external entry point for redisplay.
6857 If the last redisplay displayed an echo area message and that message
6858 is no longer requested, we clear the echo area or bring back the
6859 mini-buffer if that is in use. */
6864 redisplay_internal (0);
6868 /* Reconsider the setting of B->clip_changed which is displayed
6872 reconsider_clip_changes (w
, b
)
6876 if (b
->prevent_redisplay_optimizations_p
)
6877 b
->clip_changed
= 1;
6878 else if (b
->clip_changed
6879 && !NILP (w
->window_end_valid
)
6880 && w
->current_matrix
->buffer
== b
6881 && w
->current_matrix
->zv
== BUF_ZV (b
)
6882 && w
->current_matrix
->begv
== BUF_BEGV (b
))
6883 b
->clip_changed
= 0;
6887 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay is not in
6888 response to any user action; therefore, we should preserve the echo
6889 area. (Actually, our caller does that job.) Perhaps in the future
6890 avoid recentering windows if it is not necessary; currently that
6891 causes some problems. */
6894 redisplay_internal (preserve_echo_area
)
6895 int preserve_echo_area
;
6897 struct window
*w
= XWINDOW (selected_window
);
6898 struct frame
*f
= XFRAME (w
->frame
);
6900 int must_finish
= 0;
6901 struct text_pos tlbufpos
, tlendpos
;
6902 int number_of_visible_frames
;
6905 /* Non-zero means redisplay has to consider all windows on all
6906 frames. Zero means, only selected_window is considered. */
6907 int consider_all_windows_p
;
6909 TRACE ((stderr
, "redisplay_internal %d\n", redisplaying_p
));
6911 /* No redisplay if running in batch mode or frame is not yet fully
6912 initialized, or redisplay is explicitly turned off by setting
6913 Vinhibit_redisplay. */
6915 || !NILP (Vinhibit_redisplay
)
6916 || !f
->glyphs_initialized_p
)
6919 /* The flag redisplay_performed_directly_p is set by
6920 direct_output_for_insert when it already did the whole screen
6921 update necessary. */
6922 if (redisplay_performed_directly_p
)
6924 redisplay_performed_directly_p
= 0;
6925 if (!hscroll_windows (selected_window
))
6929 #ifdef USE_X_TOOLKIT
6930 if (popup_activated ())
6934 /* I don't think this happens but let's be paranoid. */
6938 /* Record a function that resets redisplaying_p to its old value
6939 when we leave this function. */
6940 count
= specpdl_ptr
- specpdl
;
6941 record_unwind_protect (unwind_redisplay
, make_number (redisplaying_p
));
6946 reconsider_clip_changes (w
, current_buffer
);
6948 /* If new fonts have been loaded that make a glyph matrix adjustment
6949 necessary, do it. */
6950 if (fonts_changed_p
)
6952 adjust_glyphs (NULL
);
6953 ++windows_or_buffers_changed
;
6954 fonts_changed_p
= 0;
6957 if (! FRAME_WINDOW_P (selected_frame
)
6958 && previous_terminal_frame
!= selected_frame
)
6960 /* Since frames on an ASCII terminal share the same display
6961 area, displaying a different frame means redisplay the whole
6963 windows_or_buffers_changed
++;
6964 SET_FRAME_GARBAGED (selected_frame
);
6965 XSETFRAME (Vterminal_frame
, selected_frame
);
6967 previous_terminal_frame
= selected_frame
;
6969 /* Set the visible flags for all frames. Do this before checking
6970 for resized or garbaged frames; they want to know if their frames
6971 are visible. See the comment in frame.h for
6972 FRAME_SAMPLE_VISIBILITY. */
6974 Lisp_Object tail
, frame
;
6976 number_of_visible_frames
= 0;
6978 FOR_EACH_FRAME (tail
, frame
)
6980 struct frame
*f
= XFRAME (frame
);
6982 FRAME_SAMPLE_VISIBILITY (f
);
6983 if (FRAME_VISIBLE_P (f
))
6984 ++number_of_visible_frames
;
6985 clear_desired_matrices (f
);
6989 /* Notice any pending interrupt request to change frame size. */
6990 do_pending_window_change (1);
6992 /* Clear frames marked as garbaged. */
6994 clear_garbaged_frames ();
6996 /* Build menubar and tool-bar items. */
6997 prepare_menu_bars ();
6999 if (windows_or_buffers_changed
)
7000 update_mode_lines
++;
7002 /* Detect case that we need to write or remove a star in the mode line. */
7003 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
7005 w
->update_mode_line
= Qt
;
7006 if (buffer_shared
> 1)
7007 update_mode_lines
++;
7010 /* If %c is in the mode line, update it if needed. */
7011 if (!NILP (w
->column_number_displayed
)
7012 /* This alternative quickly identifies a common case
7013 where no change is needed. */
7014 && !(PT
== XFASTINT (w
->last_point
)
7015 && XFASTINT (w
->last_modified
) >= MODIFF
7016 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
7017 && XFASTINT (w
->column_number_displayed
) != current_column ())
7018 w
->update_mode_line
= Qt
;
7020 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
7022 /* The variable buffer_shared is set in redisplay_window and
7023 indicates that we redisplay a buffer in different windows. See
7025 consider_all_windows_p
= update_mode_lines
|| buffer_shared
> 1;
7027 /* If specs for an arrow have changed, do thorough redisplay
7028 to ensure we remove any arrow that should no longer exist. */
7029 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
7030 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
7031 consider_all_windows_p
= windows_or_buffers_changed
= 1;
7033 /* Normally the message* functions will have already displayed and
7034 updated the echo area, but the frame may have been trashed, or
7035 the update may have been preempted, so display the echo area
7036 again here. Checking both message buffers captures the case that
7037 the echo area should be cleared. */
7038 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
7040 int window_height_changed_p
= echo_area_display (0);
7043 if (fonts_changed_p
)
7045 else if (window_height_changed_p
)
7047 consider_all_windows_p
= 1;
7048 ++update_mode_lines
;
7049 ++windows_or_buffers_changed
;
7051 /* If window configuration was changed, frames may have been
7052 marked garbaged. Clear them or we will experience
7053 surprises wrt scrolling. */
7055 clear_garbaged_frames ();
7058 else if (w
== XWINDOW (minibuf_window
)
7059 && (current_buffer
->clip_changed
7060 || XFASTINT (w
->last_modified
) < MODIFF
7061 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
)
7062 && resize_mini_window (w
))
7064 /* Resized active mini-window to fit the size of what it is
7065 showing if its contents might have changed. */
7067 consider_all_windows_p
= 1;
7068 ++windows_or_buffers_changed
;
7069 ++update_mode_lines
;
7071 /* If window configuration was changed, frames may have been
7072 marked garbaged. Clear them or we will experience
7073 surprises wrt scrolling. */
7075 clear_garbaged_frames ();
7079 /* If showing the region, and mark has changed, we must redisplay
7080 the whole window. The assignment to this_line_start_pos prevents
7081 the optimization directly below this if-statement. */
7082 if (((!NILP (Vtransient_mark_mode
)
7083 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
7084 != !NILP (w
->region_showing
))
7085 || (!NILP (w
->region_showing
)
7086 && !EQ (w
->region_showing
,
7087 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
7088 CHARPOS (this_line_start_pos
) = 0;
7090 /* Optimize the case that only the line containing the cursor in the
7091 selected window has changed. Variables starting with this_ are
7092 set in display_line and record information about the line
7093 containing the cursor. */
7094 tlbufpos
= this_line_start_pos
;
7095 tlendpos
= this_line_end_pos
;
7096 if (!consider_all_windows_p
7097 && CHARPOS (tlbufpos
) > 0
7098 && NILP (w
->update_mode_line
)
7099 && !current_buffer
->clip_changed
7100 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
7101 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
7102 /* Make sure recorded data applies to current buffer, etc. */
7103 && this_line_buffer
== current_buffer
7104 && current_buffer
== XBUFFER (w
->buffer
)
7105 && NILP (w
->force_start
)
7106 /* Point must be on the line that we have info recorded about. */
7107 && PT
>= CHARPOS (tlbufpos
)
7108 && PT
<= Z
- CHARPOS (tlendpos
)
7109 /* All text outside that line, including its final newline,
7110 must be unchanged */
7111 && text_outside_line_unchanged_p (w
, CHARPOS (tlbufpos
),
7112 CHARPOS (tlendpos
)))
7114 if (CHARPOS (tlbufpos
) > BEGV
7115 && FETCH_BYTE (BYTEPOS (tlbufpos
) - 1) != '\n'
7116 && (CHARPOS (tlbufpos
) == ZV
7117 || FETCH_BYTE (BYTEPOS (tlbufpos
)) == '\n'))
7118 /* Former continuation line has disappeared by becoming empty */
7120 else if (XFASTINT (w
->last_modified
) < MODIFF
7121 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
7122 || MINI_WINDOW_P (w
))
7124 /* We have to handle the case of continuation around a
7125 wide-column character (See the comment in indent.c around
7128 For instance, in the following case:
7130 -------- Insert --------
7131 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
7132 J_I_ ==> J_I_ `^^' are cursors.
7136 As we have to redraw the line above, we should goto cancel. */
7139 int line_height_before
= this_line_pixel_height
;
7141 /* Note that start_display will handle the case that the
7142 line starting at tlbufpos is a continuation lines. */
7143 start_display (&it
, w
, tlbufpos
);
7145 /* Implementation note: It this still necessary? */
7146 if (it
.current_x
!= this_line_start_x
)
7149 TRACE ((stderr
, "trying display optimization 1\n"));
7150 w
->cursor
.vpos
= -1;
7151 overlay_arrow_seen
= 0;
7152 it
.vpos
= this_line_vpos
;
7153 it
.current_y
= this_line_y
;
7154 it
.glyph_row
= MATRIX_ROW (w
->desired_matrix
, this_line_vpos
);
7157 /* If line contains point, is not continued,
7158 and ends at same distance from eob as before, we win */
7159 if (w
->cursor
.vpos
>= 0
7160 /* Line is not continued, otherwise this_line_start_pos
7161 would have been set to 0 in display_line. */
7162 && CHARPOS (this_line_start_pos
)
7163 /* Line ends as before. */
7164 && CHARPOS (this_line_end_pos
) == CHARPOS (tlendpos
)
7165 /* Line has same height as before. Otherwise other lines
7166 would have to be shifted up or down. */
7167 && this_line_pixel_height
== line_height_before
)
7169 /* If this is not the window's last line, we must adjust
7170 the charstarts of the lines below. */
7171 if (it
.current_y
< it
.last_visible_y
)
7173 struct glyph_row
*row
7174 = MATRIX_ROW (w
->current_matrix
, this_line_vpos
+ 1);
7175 int delta
, delta_bytes
;
7177 if (Z
- CHARPOS (tlendpos
) == ZV
)
7179 /* This line ends at end of (accessible part of)
7180 buffer. There is no newline to count. */
7182 - CHARPOS (tlendpos
)
7183 - MATRIX_ROW_START_CHARPOS (row
));
7184 delta_bytes
= (Z_BYTE
7185 - BYTEPOS (tlendpos
)
7186 - MATRIX_ROW_START_BYTEPOS (row
));
7190 /* This line ends in a newline. Must take
7191 account of the newline and the rest of the
7192 text that follows. */
7194 - CHARPOS (tlendpos
)
7195 - MATRIX_ROW_START_CHARPOS (row
));
7196 delta_bytes
= (Z_BYTE
7197 - BYTEPOS (tlendpos
)
7198 - MATRIX_ROW_START_BYTEPOS (row
));
7201 increment_glyph_matrix_buffer_positions (w
->current_matrix
,
7203 w
->current_matrix
->nrows
,
7204 delta
, delta_bytes
);
7207 /* If this row displays text now but previously didn't,
7208 or vice versa, w->window_end_vpos may have to be
7210 if ((it
.glyph_row
- 1)->displays_text_p
)
7212 if (XFASTINT (w
->window_end_vpos
) < this_line_vpos
)
7213 XSETINT (w
->window_end_vpos
, this_line_vpos
);
7215 else if (XFASTINT (w
->window_end_vpos
) == this_line_vpos
7216 && this_line_vpos
> 0)
7217 XSETINT (w
->window_end_vpos
, this_line_vpos
- 1);
7218 w
->window_end_valid
= Qnil
;
7220 /* Update hint: No need to try to scroll in update_window. */
7221 w
->desired_matrix
->no_scrolling_p
= 1;
7224 *w
->desired_matrix
->method
= 0;
7225 debug_method_add (w
, "optimization 1");
7232 else if (/* Cursor position hasn't changed. */
7233 PT
== XFASTINT (w
->last_point
)
7234 /* Make sure the cursor was last displayed
7235 in this window. Otherwise we have to reposition it. */
7236 && 0 <= w
->cursor
.vpos
7237 && XINT (w
->height
) > w
->cursor
.vpos
)
7241 do_pending_window_change (1);
7243 /* We used to always goto end_of_redisplay here, but this
7244 isn't enough if we have a blinking cursor. */
7245 if (w
->cursor_off_p
== w
->last_cursor_off_p
)
7246 goto end_of_redisplay
;
7250 /* If highlighting the region, or if the cursor is in the echo area,
7251 then we can't just move the cursor. */
7252 else if (! (!NILP (Vtransient_mark_mode
)
7253 && !NILP (current_buffer
->mark_active
))
7254 && (w
== XWINDOW (current_buffer
->last_selected_window
)
7255 || highlight_nonselected_windows
)
7256 && NILP (w
->region_showing
)
7257 && NILP (Vshow_trailing_whitespace
)
7258 && !cursor_in_echo_area
)
7261 struct glyph_row
*row
;
7263 /* Skip from tlbufpos to PT and see where it is. Note that
7264 PT may be in invisible text. If so, we will end at the
7265 next visible position. */
7266 init_iterator (&it
, w
, CHARPOS (tlbufpos
), BYTEPOS (tlbufpos
),
7267 NULL
, DEFAULT_FACE_ID
);
7268 it
.current_x
= this_line_start_x
;
7269 it
.current_y
= this_line_y
;
7270 it
.vpos
= this_line_vpos
;
7272 /* The call to move_it_to stops in front of PT, but
7273 moves over before-strings. */
7274 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
7276 if (it
.vpos
== this_line_vpos
7277 && (row
= MATRIX_ROW (w
->current_matrix
, this_line_vpos
),
7280 xassert (this_line_vpos
== it
.vpos
);
7281 xassert (this_line_y
== it
.current_y
);
7282 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
7290 /* Text changed drastically or point moved off of line. */
7291 SET_MATRIX_ROW_ENABLED_P (w
->desired_matrix
, this_line_vpos
, 0);
7294 CHARPOS (this_line_start_pos
) = 0;
7295 consider_all_windows_p
|= buffer_shared
> 1;
7296 ++clear_face_cache_count
;
7299 /* Build desired matrices. If consider_all_windows_p is non-zero,
7300 do it for all windows on all frames. Otherwise do it for
7301 selected_window, only. */
7303 if (consider_all_windows_p
)
7305 Lisp_Object tail
, frame
;
7307 /* Clear the face cache eventually. */
7308 if (clear_face_cache_count
> CLEAR_FACE_CACHE_COUNT
)
7310 clear_face_cache (0);
7311 clear_face_cache_count
= 0;
7314 /* Recompute # windows showing selected buffer. This will be
7315 incremented each time such a window is displayed. */
7318 FOR_EACH_FRAME (tail
, frame
)
7320 struct frame
*f
= XFRAME (frame
);
7321 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
7323 /* Mark all the scroll bars to be removed; we'll redeem
7324 the ones we want when we redisplay their windows. */
7325 if (condemn_scroll_bars_hook
)
7326 (*condemn_scroll_bars_hook
) (f
);
7328 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
7329 redisplay_windows (FRAME_ROOT_WINDOW (f
));
7331 /* Any scroll bars which redisplay_windows should have
7332 nuked should now go away. */
7333 if (judge_scroll_bars_hook
)
7334 (*judge_scroll_bars_hook
) (f
);
7338 else if (FRAME_VISIBLE_P (selected_frame
)
7339 && !FRAME_OBSCURED_P (selected_frame
))
7340 redisplay_window (selected_window
, 1);
7343 /* Compare desired and current matrices, perform output. */
7347 /* If fonts changed, display again. */
7348 if (fonts_changed_p
)
7351 /* Prevent various kinds of signals during display update.
7352 stdio is not robust about handling signals,
7353 which can cause an apparent I/O error. */
7354 if (interrupt_input
)
7358 if (consider_all_windows_p
)
7364 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
7368 if (!FRAMEP (XCAR (tail
)))
7371 f
= XFRAME (XCAR (tail
));
7373 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
7374 && FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
7376 /* Mark all windows as to be updated. */
7377 set_window_update_flags (XWINDOW (f
->root_window
), 1);
7378 pause
|= update_frame (f
, 0, 0);
7381 if (hscroll_windows (f
->root_window
))
7384 mark_window_display_accurate (f
->root_window
, 1);
7385 if (frame_up_to_date_hook
!= 0)
7386 (*frame_up_to_date_hook
) (f
);
7393 if (FRAME_VISIBLE_P (selected_frame
)
7394 && !FRAME_OBSCURED_P (selected_frame
))
7396 XWINDOW (selected_window
)->must_be_updated_p
= 1;
7397 pause
= update_frame (selected_frame
, 0, 0);
7398 if (!pause
&& hscroll_windows (selected_window
))
7404 /* We may have called echo_area_display at the top of this
7405 function. If the echo area is on another frame, that may
7406 have put text on a frame other than the selected one, so the
7407 above call to update_frame would not have caught it. Catch
7410 Lisp_Object mini_window
;
7411 struct frame
*mini_frame
;
7413 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
7414 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
7416 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
7418 XWINDOW (mini_window
)->must_be_updated_p
= 1;
7419 pause
|= update_frame (mini_frame
, 0, 0);
7420 if (!pause
&& hscroll_windows (mini_window
))
7426 /* If display was paused because of pending input, make sure we do a
7427 thorough update the next time. */
7430 /* Prevent the optimization at the beginning of
7431 redisplay_internal that tries a single-line update of the
7432 line containing the cursor in the selected window. */
7433 CHARPOS (this_line_start_pos
) = 0;
7435 /* Let the overlay arrow be updated the next time. */
7436 if (!NILP (last_arrow_position
))
7438 last_arrow_position
= Qt
;
7439 last_arrow_string
= Qt
;
7442 /* If we pause after scrolling, some rows in the current
7443 matrices of some windows are not valid. */
7444 if (!WINDOW_FULL_WIDTH_P (w
)
7445 && !FRAME_WINDOW_P (XFRAME (w
->frame
)))
7446 update_mode_lines
= 1;
7449 /* Now text on frame agrees with windows, so put info into the
7450 windows for partial redisplay to follow. */
7453 register struct buffer
*b
= XBUFFER (w
->buffer
);
7455 BUF_UNCHANGED_MODIFIED (b
) = BUF_MODIFF (b
);
7456 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = BUF_OVERLAY_MODIFF (b
);
7457 BUF_BEG_UNCHANGED (b
) = BUF_GPT (b
) - BUF_BEG (b
);
7458 BUF_END_UNCHANGED (b
) = BUF_Z (b
) - BUF_GPT (b
);
7460 if (consider_all_windows_p
)
7461 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
7464 XSETFASTINT (w
->last_point
, BUF_PT (b
));
7465 w
->last_cursor
= w
->cursor
;
7466 w
->last_cursor_off_p
= w
->cursor_off_p
;
7468 b
->clip_changed
= 0;
7469 b
->prevent_redisplay_optimizations_p
= 0;
7470 w
->update_mode_line
= Qnil
;
7471 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
7472 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
7474 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
7477 /* Record if we are showing a region, so can make sure to
7478 update it fully at next redisplay. */
7479 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
7480 && (w
== XWINDOW (current_buffer
->last_selected_window
)
7481 || highlight_nonselected_windows
)
7482 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
7483 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
7486 w
->window_end_valid
= w
->buffer
;
7487 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
7488 last_arrow_string
= Voverlay_arrow_string
;
7489 if (frame_up_to_date_hook
!= 0)
7490 (*frame_up_to_date_hook
) (selected_frame
);
7492 w
->current_matrix
->buffer
= b
;
7493 w
->current_matrix
->begv
= BUF_BEGV (b
);
7494 w
->current_matrix
->zv
= BUF_ZV (b
);
7497 update_mode_lines
= 0;
7498 windows_or_buffers_changed
= 0;
7501 /* Start SIGIO interrupts coming again. Having them off during the
7502 code above makes it less likely one will discard output, but not
7503 impossible, since there might be stuff in the system buffer here.
7504 But it is much hairier to try to do anything about that. */
7505 if (interrupt_input
)
7509 /* If a frame has become visible which was not before, redisplay
7510 again, so that we display it. Expose events for such a frame
7511 (which it gets when becoming visible) don't call the parts of
7512 redisplay constructing glyphs, so simply exposing a frame won't
7513 display anything in this case. So, we have to display these
7514 frames here explicitly. */
7517 Lisp_Object tail
, frame
;
7520 FOR_EACH_FRAME (tail
, frame
)
7522 int this_is_visible
= 0;
7524 if (XFRAME (frame
)->visible
)
7525 this_is_visible
= 1;
7526 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
7527 if (XFRAME (frame
)->visible
)
7528 this_is_visible
= 1;
7530 if (this_is_visible
)
7534 if (new_count
!= number_of_visible_frames
)
7535 windows_or_buffers_changed
++;
7538 /* Change frame size now if a change is pending. */
7539 do_pending_window_change (1);
7541 /* If we just did a pending size change, or have additional
7542 visible frames, redisplay again. */
7543 if (windows_or_buffers_changed
&& !pause
)
7548 unbind_to (count
, Qnil
);
7552 /* Redisplay, but leave alone any recent echo area message unless
7553 another message has been requested in its place.
7555 This is useful in situations where you need to redisplay but no
7556 user action has occurred, making it inappropriate for the message
7557 area to be cleared. See tracking_off and
7558 wait_reading_process_input for examples of these situations. */
7561 redisplay_preserve_echo_area ()
7563 if (!NILP (echo_area_buffer
[1]))
7565 /* We have a previously displayed message, but no current
7566 message. Redisplay the previous message. */
7567 display_last_displayed_message_p
= 1;
7568 redisplay_internal (1);
7569 display_last_displayed_message_p
= 0;
7572 redisplay_internal (1);
7576 /* Function registered with record_unwind_protect in
7577 redisplay_internal. Clears the flag indicating that a redisplay is
7581 unwind_redisplay (old_redisplaying_p
)
7582 Lisp_Object old_redisplaying_p
;
7584 redisplaying_p
= XFASTINT (old_redisplaying_p
);
7589 /* Mark the display of windows in the window tree rooted at WINDOW as
7590 accurate or inaccurate. If FLAG is non-zero mark display of WINDOW
7591 as accurate. If FLAG is zero arrange for WINDOW to be redisplayed
7592 the next time redisplay_internal is called. */
7595 mark_window_display_accurate (window
, accurate_p
)
7601 for (; !NILP (window
); window
= w
->next
)
7603 w
= XWINDOW (window
);
7605 if (BUFFERP (w
->buffer
))
7607 struct buffer
*b
= XBUFFER (w
->buffer
);
7609 XSETFASTINT (w
->last_modified
,
7610 accurate_p
? BUF_MODIFF (b
) : 0);
7611 XSETFASTINT (w
->last_overlay_modified
,
7612 accurate_p
? BUF_OVERLAY_MODIFF (b
) : 0);
7613 w
->last_had_star
= (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
)
7616 #if 0 /* I don't think this is necessary because display_line does it.
7618 /* Record if we are showing a region, so can make sure to
7619 update it fully at next redisplay. */
7621 = (!NILP (Vtransient_mark_mode
)
7622 && (w
== XWINDOW (current_buffer
->last_selected_window
)
7623 || highlight_nonselected_windows
)
7624 && (!NILP (b
->mark_active
)
7625 ? Fmarker_position (b
->mark
)
7631 b
->clip_changed
= 0;
7632 b
->prevent_redisplay_optimizations_p
= 0;
7633 w
->current_matrix
->buffer
= b
;
7634 w
->current_matrix
->begv
= BUF_BEGV (b
);
7635 w
->current_matrix
->zv
= BUF_ZV (b
);
7636 w
->last_cursor
= w
->cursor
;
7637 w
->last_cursor_off_p
= w
->cursor_off_p
;
7638 if (w
== XWINDOW (selected_window
))
7639 w
->last_point
= BUF_PT (b
);
7641 w
->last_point
= XMARKER (w
->pointm
)->charpos
;
7645 w
->window_end_valid
= w
->buffer
;
7646 w
->update_mode_line
= Qnil
;
7648 if (!NILP (w
->vchild
))
7649 mark_window_display_accurate (w
->vchild
, accurate_p
);
7650 if (!NILP (w
->hchild
))
7651 mark_window_display_accurate (w
->hchild
, accurate_p
);
7656 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
7657 last_arrow_string
= Voverlay_arrow_string
;
7661 /* Force a thorough redisplay the next time by setting
7662 last_arrow_position and last_arrow_string to t, which is
7663 unequal to any useful value of Voverlay_arrow_... */
7664 last_arrow_position
= Qt
;
7665 last_arrow_string
= Qt
;
7670 /* Return value in display table DP (Lisp_Char_Table *) for character
7671 C. Since a display table doesn't have any parent, we don't have to
7672 follow parent. Do not call this function directly but use the
7673 macro DISP_CHAR_VECTOR. */
7676 disp_char_vector (dp
, c
)
7677 struct Lisp_Char_Table
*dp
;
7683 if (SINGLE_BYTE_CHAR_P (c
))
7684 return (dp
->contents
[c
]);
7686 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
7687 if (code
[0] != CHARSET_COMPOSITION
)
7691 else if (code
[2] < 32)
7695 /* Here, the possible range of code[0] (== charset ID) is
7696 128..max_charset. Since the top level char table contains data
7697 for multibyte characters after 256th element, we must increment
7698 code[0] by 128 to get a correct index. */
7700 code
[3] = -1; /* anchor */
7702 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
7704 val
= dp
->contents
[code
[i
]];
7705 if (!SUB_CHAR_TABLE_P (val
))
7706 return (NILP (val
) ? dp
->defalt
: val
);
7709 /* Here, val is a sub char table. We return the default value of
7711 return (dp
->defalt
);
7716 /***********************************************************************
7718 ***********************************************************************/
7720 /* Redisplay all leaf windows in the window tree rooted at WINDOW. */
7723 redisplay_windows (window
)
7726 while (!NILP (window
))
7728 struct window
*w
= XWINDOW (window
);
7730 if (!NILP (w
->hchild
))
7731 redisplay_windows (w
->hchild
);
7732 else if (!NILP (w
->vchild
))
7733 redisplay_windows (w
->vchild
);
7735 redisplay_window (window
, 0);
7742 /* Set cursor position of W. PT is assumed to be displayed in ROW.
7743 DELTA is the number of bytes by which positions recorded in ROW
7744 differ from current buffer positions. */
7747 set_cursor_from_row (w
, row
, matrix
, delta
, delta_bytes
, dy
, dvpos
)
7749 struct glyph_row
*row
;
7750 struct glyph_matrix
*matrix
;
7751 int delta
, delta_bytes
, dy
, dvpos
;
7753 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
7754 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
7756 int pt_old
= PT
- delta
;
7758 /* Skip over glyphs not having an object at the start of the row.
7759 These are special glyphs like truncation marks on terminal
7761 if (row
->displays_text_p
)
7764 && glyph
->charpos
< 0)
7766 x
+= glyph
->pixel_width
;
7772 && (!BUFFERP (glyph
->object
)
7773 || glyph
->charpos
< pt_old
))
7775 x
+= glyph
->pixel_width
;
7779 w
->cursor
.hpos
= glyph
- row
->glyphs
[TEXT_AREA
];
7781 w
->cursor
.vpos
= MATRIX_ROW_VPOS (row
, matrix
) + dvpos
;
7782 w
->cursor
.y
= row
->y
+ dy
;
7784 if (w
== XWINDOW (selected_window
))
7786 if (!row
->continued_p
7787 && !MATRIX_ROW_CONTINUATION_LINE_P (row
)
7790 this_line_buffer
= XBUFFER (w
->buffer
);
7792 CHARPOS (this_line_start_pos
)
7793 = MATRIX_ROW_START_CHARPOS (row
) + delta
;
7794 BYTEPOS (this_line_start_pos
)
7795 = MATRIX_ROW_START_BYTEPOS (row
) + delta_bytes
;
7797 CHARPOS (this_line_end_pos
)
7798 = Z
- (MATRIX_ROW_END_CHARPOS (row
) + delta
);
7799 BYTEPOS (this_line_end_pos
)
7800 = Z_BYTE
- (MATRIX_ROW_END_BYTEPOS (row
) + delta_bytes
);
7802 this_line_y
= w
->cursor
.y
;
7803 this_line_pixel_height
= row
->height
;
7804 this_line_vpos
= w
->cursor
.vpos
;
7805 this_line_start_x
= row
->x
;
7808 CHARPOS (this_line_start_pos
) = 0;
7813 /* Run window scroll functions, if any, for WINDOW with new window
7814 start STARTP. Sets the window start of WINDOW to that position. */
7816 static INLINE
struct text_pos
7817 run_window_scroll_functions (window
, startp
)
7819 struct text_pos startp
;
7821 struct window
*w
= XWINDOW (window
);
7822 SET_MARKER_FROM_TEXT_POS (w
->start
, startp
);
7824 if (!NILP (Vwindow_scroll_functions
))
7826 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
7827 make_number (CHARPOS (startp
)));
7828 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
7835 /* Modify the desired matrix of window W and W->vscroll so that the
7836 line containing the cursor is fully visible. */
7839 make_cursor_line_fully_visible (w
)
7842 struct glyph_matrix
*matrix
;
7843 struct glyph_row
*row
;
7844 int header_line_height
;
7846 /* It's not always possible to find the cursor, e.g, when a window
7847 is full of overlay strings. Don't do anything in that case. */
7848 if (w
->cursor
.vpos
< 0)
7851 matrix
= w
->desired_matrix
;
7852 row
= MATRIX_ROW (matrix
, w
->cursor
.vpos
);
7854 /* If row->y == top y of window display area, the window isn't tall
7855 enough to display a single line. There is nothing we can do
7857 header_line_height
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
7858 if (row
->y
== header_line_height
)
7861 if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w
, row
))
7863 int dy
= row
->height
- row
->visible_height
;
7866 shift_glyph_matrix (w
, matrix
, 0, matrix
->nrows
, dy
);
7868 else if (MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w
, row
))
7870 int dy
= - (row
->height
- row
->visible_height
);
7873 shift_glyph_matrix (w
, matrix
, 0, matrix
->nrows
, dy
);
7876 /* When we change the cursor y-position of the selected window,
7877 change this_line_y as well so that the display optimization for
7878 the cursor line of the selected window in redisplay_internal uses
7879 the correct y-position. */
7880 if (w
== XWINDOW (selected_window
))
7881 this_line_y
= w
->cursor
.y
;
7885 /* Try scrolling PT into view in window WINDOW. JUST_THIS_ONE_P
7886 non-zero means only WINDOW is redisplayed in redisplay_internal.
7887 TEMP_SCROLL_STEP has the same meaning as scroll_step, and is used
7888 in redisplay_window to bring a partially visible line into view in
7889 the case that only the cursor has moved.
7893 1 if scrolling succeeded
7895 0 if scrolling didn't find point.
7897 -1 if new fonts have been loaded so that we must interrupt
7898 redisplay, adjust glyph matrices, and try again. */
7901 try_scrolling (window
, just_this_one_p
, scroll_conservatively
,
7902 scroll_step
, temp_scroll_step
)
7904 int just_this_one_p
;
7905 int scroll_conservatively
, scroll_step
;
7906 int temp_scroll_step
;
7908 struct window
*w
= XWINDOW (window
);
7909 struct frame
*f
= XFRAME (w
->frame
);
7910 struct text_pos scroll_margin_pos
;
7911 struct text_pos pos
;
7912 struct text_pos startp
;
7914 Lisp_Object window_end
;
7915 int this_scroll_margin
;
7918 int line_height
, rc
;
7919 int amount_to_scroll
= 0;
7920 Lisp_Object aggressive
;
7924 debug_method_add (w
, "try_scrolling");
7927 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
7929 /* Compute scroll margin height in pixels. We scroll when point is
7930 within this distance from the top or bottom of the window. */
7931 if (scroll_margin
> 0)
7933 this_scroll_margin
= min (scroll_margin
, XINT (w
->height
) / 4);
7934 this_scroll_margin
*= CANON_Y_UNIT (f
);
7937 this_scroll_margin
= 0;
7939 /* Compute how much we should try to scroll maximally to bring point
7942 scroll_max
= scroll_step
;
7943 else if (scroll_conservatively
)
7944 scroll_max
= scroll_conservatively
;
7945 else if (temp_scroll_step
)
7946 scroll_max
= temp_scroll_step
;
7947 else if (NUMBERP (current_buffer
->scroll_down_aggressively
)
7948 || NUMBERP (current_buffer
->scroll_up_aggressively
))
7949 /* We're trying to scroll because of aggressive scrolling
7950 but no scroll_step is set. Choose an arbitrary one. Maybe
7951 there should be a variable for this. */
7955 scroll_max
*= CANON_Y_UNIT (f
);
7957 /* Decide whether we have to scroll down. Start at the window end
7958 and move this_scroll_margin up to find the position of the scroll
7960 window_end
= Fwindow_end (window
, Qt
);
7961 CHARPOS (scroll_margin_pos
) = XINT (window_end
);
7962 BYTEPOS (scroll_margin_pos
) = CHAR_TO_BYTE (CHARPOS (scroll_margin_pos
));
7963 if (this_scroll_margin
)
7965 start_display (&it
, w
, scroll_margin_pos
);
7966 move_it_vertically (&it
, - this_scroll_margin
);
7967 scroll_margin_pos
= it
.current
.pos
;
7970 if (PT
>= CHARPOS (scroll_margin_pos
))
7974 /* Point is in the scroll margin at the bottom of the window, or
7975 below. Compute a new window start that makes point visible. */
7977 /* Compute the distance from the scroll margin to PT.
7978 Give up if the distance is greater than scroll_max. */
7979 start_display (&it
, w
, scroll_margin_pos
);
7981 move_it_to (&it
, PT
, 0, it
.last_visible_y
, -1,
7982 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
7983 line_height
= (it
.max_ascent
+ it
.max_descent
7984 ? it
.max_ascent
+ it
.max_descent
7986 dy
= it
.current_y
+ line_height
- y0
;
7987 if (dy
> scroll_max
)
7990 /* Move the window start down. If scrolling conservatively,
7991 move it just enough down to make point visible. If
7992 scroll_step is set, move it down by scroll_step. */
7993 start_display (&it
, w
, startp
);
7995 if (scroll_conservatively
)
7996 amount_to_scroll
= dy
;
7997 else if (scroll_step
|| temp_scroll_step
)
7998 amount_to_scroll
= scroll_max
;
8001 aggressive
= current_buffer
->scroll_down_aggressively
;
8002 height
= (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
)
8003 - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
));
8004 if (NUMBERP (aggressive
))
8005 amount_to_scroll
= XFLOATINT (aggressive
) * height
;
8008 if (amount_to_scroll
<= 0)
8011 move_it_vertically (&it
, amount_to_scroll
);
8012 startp
= it
.current
.pos
;
8016 /* See if point is inside the scroll margin at the top of the
8018 scroll_margin_pos
= startp
;
8019 if (this_scroll_margin
)
8021 start_display (&it
, w
, startp
);
8022 move_it_vertically (&it
, this_scroll_margin
);
8023 scroll_margin_pos
= it
.current
.pos
;
8026 if (PT
< CHARPOS (scroll_margin_pos
))
8028 /* Point is in the scroll margin at the top of the window or
8029 above what is displayed in the window. */
8032 /* Compute the vertical distance from PT to the scroll
8033 margin position. Give up if distance is greater than
8035 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
8036 start_display (&it
, w
, pos
);
8038 move_it_to (&it
, CHARPOS (scroll_margin_pos
), 0,
8039 it
.last_visible_y
, -1,
8040 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
8041 dy
= it
.current_y
- y0
;
8042 if (dy
> scroll_max
)
8045 /* Compute new window start. */
8046 start_display (&it
, w
, startp
);
8048 if (scroll_conservatively
)
8049 amount_to_scroll
= dy
;
8050 else if (scroll_step
|| temp_scroll_step
)
8051 amount_to_scroll
= scroll_max
;
8054 aggressive
= current_buffer
->scroll_up_aggressively
;
8055 height
= (WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
)
8056 - WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
));
8057 if (NUMBERP (aggressive
))
8058 amount_to_scroll
= XFLOATINT (aggressive
) * height
;
8061 if (amount_to_scroll
<= 0)
8064 move_it_vertically (&it
, - amount_to_scroll
);
8065 startp
= it
.current
.pos
;
8069 /* Run window scroll functions. */
8070 startp
= run_window_scroll_functions (window
, startp
);
8072 /* Display the window. Give up if new fonts are loaded, or if point
8074 if (!try_window (window
, startp
))
8076 else if (w
->cursor
.vpos
< 0)
8078 clear_glyph_matrix (w
->desired_matrix
);
8083 /* Maybe forget recorded base line for line number display. */
8084 if (!just_this_one_p
8085 || current_buffer
->clip_changed
8086 || BEG_UNCHANGED
< CHARPOS (startp
))
8087 w
->base_line_number
= Qnil
;
8089 /* If cursor ends up on a partially visible line, shift display
8090 lines up or down. */
8091 make_cursor_line_fully_visible (w
);
8099 /* Compute a suitable window start for window W if display of W starts
8100 on a continuation line. Value is non-zero if a new window start
8103 The new window start will be computed, based on W's width, starting
8104 from the start of the continued line. It is the start of the
8105 screen line with the minimum distance from the old start W->start. */
8108 compute_window_start_on_continuation_line (w
)
8111 struct text_pos pos
, start_pos
;
8112 int window_start_changed_p
= 0;
8114 SET_TEXT_POS_FROM_MARKER (start_pos
, w
->start
);
8116 /* If window start is on a continuation line... Window start may be
8117 < BEGV in case there's invisible text at the start of the
8118 buffer (M-x rmail, for example). */
8119 if (CHARPOS (start_pos
) > BEGV
8120 && FETCH_BYTE (BYTEPOS (start_pos
) - 1) != '\n')
8123 struct glyph_row
*row
;
8125 /* Find the start of the continued line. This should be fast
8126 because scan_buffer is fast (newline cache). */
8127 row
= w
->desired_matrix
->rows
+ (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0);
8128 init_iterator (&it
, w
, CHARPOS (start_pos
), BYTEPOS (start_pos
),
8129 row
, DEFAULT_FACE_ID
);
8130 reseat_at_previous_visible_line_start (&it
);
8132 /* If the line start is "too far" away from the window start,
8133 say it takes too much time to compute a new window start. */
8134 if (CHARPOS (start_pos
) - IT_CHARPOS (it
)
8135 < XFASTINT (w
->height
) * XFASTINT (w
->width
))
8137 int min_distance
, distance
;
8139 /* Move forward by display lines to find the new window
8140 start. If window width was enlarged, the new start can
8141 be expected to be > the old start. If window width was
8142 decreased, the new window start will be < the old start.
8143 So, we're looking for the display line start with the
8144 minimum distance from the old window start. */
8145 pos
= it
.current
.pos
;
8146 min_distance
= INFINITY
;
8147 while ((distance
= abs (CHARPOS (start_pos
) - IT_CHARPOS (it
))),
8148 distance
< min_distance
)
8150 min_distance
= distance
;
8151 pos
= it
.current
.pos
;
8152 move_it_by_lines (&it
, 1, 0);
8155 /* Set the window start there. */
8156 SET_MARKER_FROM_TEXT_POS (w
->start
, pos
);
8157 window_start_changed_p
= 1;
8161 return window_start_changed_p
;
8165 /* Redisplay leaf window WINDOW. JUST_THIS_ONE_P non-zero means only
8166 selected_window is redisplayed. */
8169 redisplay_window (window
, just_this_one_p
)
8171 int just_this_one_p
;
8173 struct window
*w
= XWINDOW (window
);
8174 struct frame
*f
= XFRAME (w
->frame
);
8175 struct buffer
*buffer
= XBUFFER (w
->buffer
);
8176 struct buffer
*old
= current_buffer
;
8177 struct text_pos lpoint
, opoint
, startp
;
8178 int update_mode_line
;
8181 /* Record it now because it's overwritten. */
8182 int current_matrix_up_to_date_p
= 0;
8183 int really_switched_buffer
= 0;
8184 int temp_scroll_step
= 0;
8185 int count
= specpdl_ptr
- specpdl
;
8187 SET_TEXT_POS (lpoint
, PT
, PT_BYTE
);
8190 /* W must be a leaf window here. */
8191 xassert (!NILP (w
->buffer
));
8193 *w
->desired_matrix
->method
= 0;
8196 specbind (Qinhibit_point_motion_hooks
, Qt
);
8198 reconsider_clip_changes (w
, buffer
);
8200 /* Has the mode line to be updated? */
8201 update_mode_line
= (!NILP (w
->update_mode_line
)
8202 || update_mode_lines
8203 || buffer
->clip_changed
);
8205 if (MINI_WINDOW_P (w
))
8207 if (w
== XWINDOW (echo_area_window
)
8208 && !NILP (echo_area_buffer
[0]))
8210 if (update_mode_line
)
8211 /* We may have to update a tty frame's menu bar or a
8212 tool-bar. Example `M-x C-h C-h C-g'. */
8213 goto finish_menu_bars
;
8215 /* We've already displayed the echo area glyphs in this window. */
8216 goto finish_scroll_bars
;
8218 else if (w
!= XWINDOW (minibuf_window
))
8220 /* W is a mini-buffer window, but it's not the currently
8221 active one, so clear it. */
8222 int yb
= window_text_bottom_y (w
);
8223 struct glyph_row
*row
;
8226 for (y
= 0, row
= w
->desired_matrix
->rows
;
8228 y
+= row
->height
, ++row
)
8229 blank_row (w
, row
, y
);
8230 goto finish_scroll_bars
;
8234 /* Otherwise set up data on this window; select its buffer and point
8236 if (update_mode_line
)
8238 /* Really select the buffer, for the sake of buffer-local
8240 set_buffer_internal_1 (XBUFFER (w
->buffer
));
8241 really_switched_buffer
= 1;
8244 set_buffer_temp (XBUFFER (w
->buffer
));
8245 SET_TEXT_POS (opoint
, PT
, PT_BYTE
);
8247 current_matrix_up_to_date_p
8248 = (!NILP (w
->window_end_valid
)
8249 && !current_buffer
->clip_changed
8250 && XFASTINT (w
->last_modified
) >= MODIFF
8251 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
);
8253 /* When windows_or_buffers_changed is non-zero, we can't rely on
8254 the window end being valid, so set it to nil there. */
8255 if (windows_or_buffers_changed
)
8257 /* If window starts on a continuation line, maybe adjust the
8258 window start in case the window's width changed. */
8259 if (XMARKER (w
->start
)->buffer
== current_buffer
)
8260 compute_window_start_on_continuation_line (w
);
8262 w
->window_end_valid
= Qnil
;
8265 /* Some sanity checks. */
8266 CHECK_WINDOW_END (w
);
8267 if (Z
== Z_BYTE
&& CHARPOS (opoint
) != BYTEPOS (opoint
))
8269 if (BYTEPOS (opoint
) < CHARPOS (opoint
))
8272 /* If %c is in mode line, update it if needed. */
8273 if (!NILP (w
->column_number_displayed
)
8274 /* This alternative quickly identifies a common case
8275 where no change is needed. */
8276 && !(PT
== XFASTINT (w
->last_point
)
8277 && XFASTINT (w
->last_modified
) >= MODIFF
8278 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
8279 && XFASTINT (w
->column_number_displayed
) != current_column ())
8280 update_mode_line
= 1;
8282 /* Count number of windows showing the selected buffer. An indirect
8283 buffer counts as its base buffer. */
8284 if (!just_this_one_p
)
8286 struct buffer
*current_base
, *window_base
;
8287 current_base
= current_buffer
;
8288 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
8289 if (current_base
->base_buffer
)
8290 current_base
= current_base
->base_buffer
;
8291 if (window_base
->base_buffer
)
8292 window_base
= window_base
->base_buffer
;
8293 if (current_base
== window_base
)
8297 /* Point refers normally to the selected window. For any other
8298 window, set up appropriate value. */
8299 if (!EQ (window
, selected_window
))
8301 int new_pt
= XMARKER (w
->pointm
)->charpos
;
8302 int new_pt_byte
= marker_byte_position (w
->pointm
);
8306 new_pt_byte
= BEGV_BYTE
;
8307 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
8309 else if (new_pt
> (ZV
- 1))
8312 new_pt_byte
= ZV_BYTE
;
8313 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
8316 /* We don't use SET_PT so that the point-motion hooks don't run. */
8317 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
8320 /* If any of the character widths specified in the display table
8321 have changed, invalidate the width run cache. It's true that
8322 this may be a bit late to catch such changes, but the rest of
8323 redisplay goes (non-fatally) haywire when the display table is
8324 changed, so why should we worry about doing any better? */
8325 if (current_buffer
->width_run_cache
)
8327 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
8329 if (! disptab_matches_widthtab (disptab
,
8330 XVECTOR (current_buffer
->width_table
)))
8332 invalidate_region_cache (current_buffer
,
8333 current_buffer
->width_run_cache
,
8335 recompute_width_table (current_buffer
, disptab
);
8339 /* If window-start is screwed up, choose a new one. */
8340 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
8343 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
8345 /* If someone specified a new starting point but did not insist,
8346 check whether it can be used. */
8347 if (!NILP (w
->optional_new_start
))
8349 w
->optional_new_start
= Qnil
;
8350 /* This takes a mini-buffer prompt into account. */
8351 start_display (&it
, w
, startp
);
8352 move_it_to (&it
, PT
, 0, it
.last_visible_y
, -1,
8353 MOVE_TO_POS
| MOVE_TO_X
| MOVE_TO_Y
);
8354 if (IT_CHARPOS (it
) == PT
)
8355 w
->force_start
= Qt
;
8358 /* Handle case where place to start displaying has been specified,
8359 unless the specified location is outside the accessible range. */
8360 if (!NILP (w
->force_start
)
8361 || w
->frozen_window_start_p
)
8363 w
->force_start
= Qnil
;
8365 w
->window_end_valid
= Qnil
;
8367 /* Forget any recorded base line for line number display. */
8368 if (!current_matrix_up_to_date_p
8369 || current_buffer
->clip_changed
)
8370 w
->base_line_number
= Qnil
;
8372 /* Redisplay the mode line. Select the buffer properly for that.
8373 Also, run the hook window-scroll-functions
8374 because we have scrolled. */
8375 /* Note, we do this after clearing force_start because
8376 if there's an error, it is better to forget about force_start
8377 than to get into an infinite loop calling the hook functions
8378 and having them get more errors. */
8379 if (!update_mode_line
8380 || ! NILP (Vwindow_scroll_functions
))
8382 if (!really_switched_buffer
)
8384 set_buffer_temp (old
);
8385 set_buffer_internal_1 (XBUFFER (w
->buffer
));
8386 really_switched_buffer
= 1;
8389 update_mode_line
= 1;
8390 w
->update_mode_line
= Qt
;
8391 startp
= run_window_scroll_functions (window
, startp
);
8394 XSETFASTINT (w
->last_modified
, 0);
8395 XSETFASTINT (w
->last_overlay_modified
, 0);
8396 if (CHARPOS (startp
) < BEGV
)
8397 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
8398 else if (CHARPOS (startp
) > ZV
)
8399 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
8401 /* Redisplay, then check if cursor has been set during the
8402 redisplay. Give up if new fonts were loaded. */
8403 if (!try_window (window
, startp
))
8405 w
->force_start
= Qt
;
8406 clear_glyph_matrix (w
->desired_matrix
);
8407 goto restore_buffers
;
8410 if (w
->cursor
.vpos
< 0 && !w
->frozen_window_start_p
)
8412 /* If point does not appear, or on a line that is not fully
8413 visible, move point so it does appear. The desired
8414 matrix has been built above, so we can use it. */
8415 int height
= window_box_height (w
) / 2;
8416 struct glyph_row
*row
= MATRIX_ROW (w
->desired_matrix
, 0);
8418 while (row
->y
< height
)
8421 TEMP_SET_PT_BOTH (MATRIX_ROW_START_CHARPOS (row
),
8422 MATRIX_ROW_START_BYTEPOS (row
));
8424 if (w
!= XWINDOW (selected_window
))
8425 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
8426 else if (current_buffer
== old
)
8427 SET_TEXT_POS (lpoint
, PT
, PT_BYTE
);
8429 set_cursor_from_row (w
, row
, w
->desired_matrix
, 0, 0, 0, 0);
8431 /* If we are highlighting the region, then we just changed
8432 the region, so redisplay to show it. */
8433 if (!NILP (Vtransient_mark_mode
)
8434 && !NILP (current_buffer
->mark_active
))
8436 clear_glyph_matrix (w
->desired_matrix
);
8437 if (!try_window (window
, startp
))
8438 goto restore_buffers
;
8442 make_cursor_line_fully_visible (w
);
8444 debug_method_add (w
, "forced window start");
8449 /* Handle case where text has not changed, only point, and it has
8450 not moved off the frame. */
8451 if (current_matrix_up_to_date_p
8452 /* Point may be in this window. */
8453 && PT
>= CHARPOS (startp
)
8454 /* If we don't check this, we are called to move the cursor in a
8455 horizontally split window with a current matrix that doesn't
8457 && !windows_or_buffers_changed
8458 /* Selective display hasn't changed. */
8459 && !current_buffer
->clip_changed
8460 /* If force-mode-line-update was called, really redisplay;
8461 that's how redisplay is forced after e.g. changing
8462 buffer-invisibility-spec. */
8463 && NILP (w
->update_mode_line
)
8464 /* Can't use this case if highlighting a region. When a
8465 region exists, cursor movement has to do more than just
8467 && !(!NILP (Vtransient_mark_mode
)
8468 && !NILP (current_buffer
->mark_active
))
8469 && NILP (w
->region_showing
)
8470 && NILP (Vshow_trailing_whitespace
)
8471 /* Right after splitting windows, last_point may be nil. */
8472 && INTEGERP (w
->last_point
)
8473 /* This code is not used for mini-buffer for the sake of the case
8474 of redisplaying to replace an echo area message; since in
8475 that case the mini-buffer contents per se are usually
8476 unchanged. This code is of no real use in the mini-buffer
8477 since the handling of this_line_start_pos, etc., in redisplay
8478 handles the same cases. */
8479 && !EQ (window
, minibuf_window
)
8480 /* When splitting windows or for new windows, it happens that
8481 redisplay is called with a nil window_end_vpos or one being
8482 larger than the window. This should really be fixed in
8483 window.c. I don't have this on my list, now, so we do
8484 approximately the same as the old redisplay code. --gerd. */
8485 && INTEGERP (w
->window_end_vpos
)
8486 && XFASTINT (w
->window_end_vpos
) < w
->current_matrix
->nrows
8487 && (FRAME_WINDOW_P (f
)
8488 || !MARKERP (Voverlay_arrow_position
)
8489 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
8491 int this_scroll_margin
;
8492 struct glyph_row
*row
;
8496 debug_method_add (w
, "cursor movement");
8499 /* Scroll if point within this distance from the top or bottom
8500 of the window. This is a pixel value. */
8501 this_scroll_margin
= max (0, scroll_margin
);
8502 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
8503 this_scroll_margin
*= CANON_Y_UNIT (f
);
8505 /* Start with the row the cursor was displayed during the last
8506 not paused redisplay. Give up if that row is not valid. */
8507 if (w
->last_cursor
.vpos
>= w
->current_matrix
->nrows
)
8509 row
= MATRIX_ROW (w
->current_matrix
, w
->last_cursor
.vpos
);
8510 if (row
->mode_line_p
)
8512 if (!row
->enabled_p
)
8516 if (PT
> XFASTINT (w
->last_point
))
8518 /* Point has moved forward. */
8519 int last_y
= window_text_bottom_y (w
) - this_scroll_margin
;
8521 while ((MATRIX_ROW_END_CHARPOS (row
) < PT
8522 /* The end position of a row equals the start
8523 position of the next row. If PT is there, we
8524 would rather display it in the next line, except
8525 when this line ends in ZV. */
8526 || (MATRIX_ROW_END_CHARPOS (row
) == PT
8527 && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)
8528 || !row
->ends_at_zv_p
)))
8529 && MATRIX_ROW_BOTTOM_Y (row
) < last_y
)
8531 xassert (row
->enabled_p
);
8535 /* If within the scroll margin, scroll. Note that
8536 MATRIX_ROW_BOTTOM_Y gives the pixel position at which the
8537 next line would be drawn, and that this_scroll_margin can
8539 if (MATRIX_ROW_BOTTOM_Y (row
) > last_y
8540 || PT
> MATRIX_ROW_END_CHARPOS (row
)
8541 /* Line is completely visible last line in window and PT
8542 is to be set in the next line. */
8543 || (MATRIX_ROW_BOTTOM_Y (row
) == last_y
8544 && PT
== MATRIX_ROW_END_CHARPOS (row
)
8545 && !row
->ends_at_zv_p
8546 && !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)))
8549 else if (PT
< XFASTINT (w
->last_point
))
8551 /* Cursor has to be moved backward. Note that PT >=
8552 CHARPOS (startp) because of the outer if-statement. */
8553 while (!row
->mode_line_p
8554 && (MATRIX_ROW_START_CHARPOS (row
) > PT
8555 || (MATRIX_ROW_START_CHARPOS (row
) == PT
8556 && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row
)))
8557 && (row
->y
> this_scroll_margin
8558 || CHARPOS (startp
) == BEGV
))
8560 xassert (row
->enabled_p
);
8564 /* Consider the following case: Window starts at BEGV, there
8565 is invisible, intangible text at BEGV, so that display
8566 starts at some point START > BEGV. It can happen that
8567 we are called with PT somewhere between BEGV and START.
8568 Try to handle that case. */
8569 if (row
< w
->current_matrix
->rows
8570 || row
->mode_line_p
)
8572 row
= w
->current_matrix
->rows
;
8573 if (row
->mode_line_p
)
8577 /* Due to newlines in overlay strings, we may have to skip
8578 forward over overlay strings. */
8579 while (MATRIX_ROW_END_CHARPOS (row
) == PT
8580 && MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P (row
)
8581 && !row
->ends_at_zv_p
)
8584 /* If within the scroll margin, scroll. */
8585 if (row
->y
< this_scroll_margin
8586 && CHARPOS (startp
) != BEGV
)
8590 /* if PT is not in the glyph row, give up. */
8591 if (PT
< MATRIX_ROW_START_CHARPOS (row
)
8592 || PT
> MATRIX_ROW_END_CHARPOS (row
))
8595 /* If we end up in a partially visible line, let's make it fully
8596 visible. This can be done most easily by using the existing
8598 if (MATRIX_ROW_PARTIALLY_VISIBLE_P (row
))
8600 temp_scroll_step
= 1;
8606 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
8610 /* If current starting point was originally the beginning of a line
8611 but no longer is, find a new starting point. */
8612 else if (!NILP (w
->start_at_line_beg
)
8613 && !(CHARPOS (startp
) <= BEGV
8614 || FETCH_BYTE (BYTEPOS (startp
) - 1) == '\n'))
8617 debug_method_add (w
, "recenter 1");
8622 /* Try scrolling with try_window_id. */
8623 else if (/* Windows and buffers haven't changed. */
8624 !windows_or_buffers_changed
8625 /* Window must be either use window-based redisplay or
8627 && (FRAME_WINDOW_P (f
)
8628 || (line_ins_del_ok
&& WINDOW_FULL_WIDTH_P (w
)))
8629 && !MINI_WINDOW_P (w
)
8630 /* Point is not known NOT to appear in window. */
8631 && PT
>= CHARPOS (startp
)
8632 && XFASTINT (w
->last_modified
)
8633 /* Window is not hscrolled. */
8634 && XFASTINT (w
->hscroll
) == 0
8635 /* Selective display has not changed. */
8636 && !current_buffer
->clip_changed
8637 /* Current matrix is up to date. */
8638 && !NILP (w
->window_end_valid
)
8639 /* Can't use this case if highlighting a region because
8640 a cursor movement will do more than just set the cursor. */
8641 && !(!NILP (Vtransient_mark_mode
)
8642 && !NILP (current_buffer
->mark_active
))
8643 && NILP (w
->region_showing
)
8644 && NILP (Vshow_trailing_whitespace
)
8645 /* Overlay arrow position and string not changed. */
8646 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
8647 && EQ (last_arrow_string
, Voverlay_arrow_string
)
8648 /* Value is > 0 if update has been done, it is -1 if we
8649 know that the same window start will not work. It is 0
8650 if unsuccessful for some other reason. */
8651 && (tem
= try_window_id (w
)) != 0)
8654 debug_method_add (w
, "try_window_id");
8657 if (fonts_changed_p
)
8658 goto restore_buffers
;
8661 /* Otherwise try_window_id has returned -1 which means that we
8662 don't want the alternative below this comment to execute. */
8664 else if (CHARPOS (startp
) >= BEGV
8665 && CHARPOS (startp
) <= ZV
8666 && PT
>= CHARPOS (startp
)
8667 && (CHARPOS (startp
) < ZV
8668 /* Avoid starting at end of buffer. */
8669 || CHARPOS (startp
) == BEGV
8670 || (XFASTINT (w
->last_modified
) >= MODIFF
8671 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
8674 debug_method_add (w
, "same window start");
8677 /* Try to redisplay starting at same place as before.
8678 If point has not moved off frame, accept the results. */
8679 if (!current_matrix_up_to_date_p
8680 /* Don't use try_window_reusing_current_matrix in this case
8681 because it can have changed the buffer. */
8682 || !NILP (Vwindow_scroll_functions
)
8683 || MINI_WINDOW_P (w
)
8684 || !try_window_reusing_current_matrix (w
))
8686 IF_DEBUG (debug_method_add (w
, "1"));
8687 try_window (window
, startp
);
8690 if (fonts_changed_p
)
8691 goto restore_buffers
;
8693 if (w
->cursor
.vpos
>= 0)
8695 if (!just_this_one_p
8696 || current_buffer
->clip_changed
8697 || BEG_UNCHANGED
< CHARPOS (startp
))
8698 /* Forget any recorded base line for line number display. */
8699 w
->base_line_number
= Qnil
;
8701 make_cursor_line_fully_visible (w
);
8705 clear_glyph_matrix (w
->desired_matrix
);
8710 XSETFASTINT (w
->last_modified
, 0);
8711 XSETFASTINT (w
->last_overlay_modified
, 0);
8713 /* Redisplay the mode line. Select the buffer properly for that. */
8714 if (!update_mode_line
)
8716 if (!really_switched_buffer
)
8718 set_buffer_temp (old
);
8719 set_buffer_internal_1 (XBUFFER (w
->buffer
));
8720 really_switched_buffer
= 1;
8722 update_mode_line
= 1;
8723 w
->update_mode_line
= Qt
;
8726 /* Try to scroll by specified few lines. */
8727 if ((scroll_conservatively
8730 || NUMBERP (current_buffer
->scroll_up_aggressively
)
8731 || NUMBERP (current_buffer
->scroll_down_aggressively
))
8732 && !current_buffer
->clip_changed
8733 && CHARPOS (startp
) >= BEGV
8734 && CHARPOS (startp
) <= ZV
)
8736 /* The function returns -1 if new fonts were loaded, 1 if
8737 successful, 0 if not successful. */
8738 int rc
= try_scrolling (window
, just_this_one_p
,
8739 scroll_conservatively
,
8745 goto restore_buffers
;
8748 /* Finally, just choose place to start which centers point */
8753 debug_method_add (w
, "recenter");
8756 /* w->vscroll = 0; */
8758 /* Forget any previously recorded base line for line number display. */
8759 if (!current_matrix_up_to_date_p
8760 || current_buffer
->clip_changed
)
8761 w
->base_line_number
= Qnil
;
8763 /* Move backward half the height of the window. */
8764 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
8765 it
.current_y
= it
.last_visible_y
;
8766 move_it_vertically_backward (&it
, it
.last_visible_y
/ 2);
8767 xassert (IT_CHARPOS (it
) >= BEGV
);
8769 /* The function move_it_vertically_backward may move over more
8770 than the specified y-distance. If it->w is small, e.g. a
8771 mini-buffer window, we may end up in front of the window's
8772 display area. Start displaying at the start of the line
8773 containing PT in this case. */
8774 if (it
.current_y
<= 0)
8776 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
8777 move_it_vertically (&it
, 0);
8778 xassert (IT_CHARPOS (it
) <= PT
);
8782 it
.current_x
= it
.hpos
= 0;
8784 /* Set startp here explicitly in case that helps avoid an infinite loop
8785 in case the window-scroll-functions functions get errors. */
8786 set_marker_both (w
->start
, Qnil
, IT_CHARPOS (it
), IT_BYTEPOS (it
));
8788 /* Run scroll hooks. */
8789 startp
= run_window_scroll_functions (window
, it
.current
.pos
);
8791 /* Redisplay the window. */
8792 if (!current_matrix_up_to_date_p
8793 || windows_or_buffers_changed
8794 /* Don't use try_window_reusing_current_matrix in this case
8795 because it can have changed the buffer. */
8796 || !NILP (Vwindow_scroll_functions
)
8798 || MINI_WINDOW_P (w
)
8799 || !try_window_reusing_current_matrix (w
))
8800 try_window (window
, startp
);
8802 /* If new fonts have been loaded (due to fontsets), give up. We
8803 have to start a new redisplay since we need to re-adjust glyph
8805 if (fonts_changed_p
)
8806 goto restore_buffers
;
8808 /* If cursor did not appear assume that the middle of the window is
8809 in the first line of the window. Do it again with the next line.
8810 (Imagine a window of height 100, displaying two lines of height
8811 60. Moving back 50 from it->last_visible_y will end in the first
8813 if (w
->cursor
.vpos
< 0)
8815 if (!NILP (w
->window_end_valid
)
8816 && PT
>= Z
- XFASTINT (w
->window_end_pos
))
8818 clear_glyph_matrix (w
->desired_matrix
);
8819 move_it_by_lines (&it
, 1, 0);
8820 try_window (window
, it
.current
.pos
);
8822 else if (PT
< IT_CHARPOS (it
))
8824 clear_glyph_matrix (w
->desired_matrix
);
8825 move_it_by_lines (&it
, -1, 0);
8826 try_window (window
, it
.current
.pos
);
8830 /* Not much we can do about it. */
8834 /* Consider the following case: Window starts at BEGV, there is
8835 invisible, intangible text at BEGV, so that display starts at
8836 some point START > BEGV. It can happen that we are called with
8837 PT somewhere between BEGV and START. Try to handle that case. */
8838 if (w
->cursor
.vpos
< 0)
8840 struct glyph_row
*row
= w
->current_matrix
->rows
;
8841 if (row
->mode_line_p
)
8843 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
8846 make_cursor_line_fully_visible (w
);
8848 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
8849 w
->start_at_line_beg
= ((CHARPOS (startp
) == BEGV
8850 || FETCH_BYTE (BYTEPOS (startp
) - 1) == '\n')
8855 /* Display the mode line, if we must. */
8856 if ((update_mode_line
8857 /* If window not full width, must redo its mode line
8858 if (a) the window to its side is being redone and
8859 (b) we do a frame-based redisplay. This is a consequence
8860 of how inverted lines are drawn in frame-based redisplay. */
8861 || (!just_this_one_p
8862 && !FRAME_WINDOW_P (f
)
8863 && !WINDOW_FULL_WIDTH_P (w
))
8864 /* Line number to display. */
8865 || INTEGERP (w
->base_line_pos
)
8866 /* Column number is displayed and different from the one displayed. */
8867 || (!NILP (w
->column_number_displayed
)
8868 && XFASTINT (w
->column_number_displayed
) != current_column ()))
8869 /* This means that the window has a mode line. */
8870 && (WINDOW_WANTS_MODELINE_P (w
)
8871 || WINDOW_WANTS_HEADER_LINE_P (w
)))
8873 display_mode_lines (w
);
8875 /* If mode line height has changed, arrange for a thorough
8876 immediate redisplay using the correct mode line height. */
8877 if (WINDOW_WANTS_MODELINE_P (w
)
8878 && CURRENT_MODE_LINE_HEIGHT (w
) != DESIRED_MODE_LINE_HEIGHT (w
))
8880 fonts_changed_p
= 1;
8881 MATRIX_MODE_LINE_ROW (w
->current_matrix
)->height
8882 = DESIRED_MODE_LINE_HEIGHT (w
);
8885 /* If top line height has changed, arrange for a thorough
8886 immediate redisplay using the correct mode line height. */
8887 if (WINDOW_WANTS_HEADER_LINE_P (w
)
8888 && CURRENT_HEADER_LINE_HEIGHT (w
) != DESIRED_HEADER_LINE_HEIGHT (w
))
8890 fonts_changed_p
= 1;
8891 MATRIX_HEADER_LINE_ROW (w
->current_matrix
)->height
8892 = DESIRED_HEADER_LINE_HEIGHT (w
);
8895 if (fonts_changed_p
)
8896 goto restore_buffers
;
8899 if (!line_number_displayed
8900 && !BUFFERP (w
->base_line_pos
))
8902 w
->base_line_pos
= Qnil
;
8903 w
->base_line_number
= Qnil
;
8908 /* When we reach a frame's selected window, redo the frame's menu bar. */
8909 if (update_mode_line
8910 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
8912 int redisplay_menu_p
= 0;
8914 if (FRAME_WINDOW_P (f
))
8916 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
8917 redisplay_menu_p
= FRAME_EXTERNAL_MENU_BAR (f
);
8919 redisplay_menu_p
= FRAME_MENU_BAR_LINES (f
) > 0;
8923 redisplay_menu_p
= FRAME_MENU_BAR_LINES (f
) > 0;
8925 if (redisplay_menu_p
)
8926 display_menu_bar (w
);
8928 #ifdef HAVE_WINDOW_SYSTEM
8929 if (WINDOWP (f
->tool_bar_window
)
8930 && (FRAME_TOOL_BAR_LINES (f
) > 0
8931 || auto_resize_tool_bars_p
))
8932 redisplay_tool_bar (f
);
8938 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
8940 int start
, end
, whole
;
8942 /* Calculate the start and end positions for the current window.
8943 At some point, it would be nice to choose between scrollbars
8944 which reflect the whole buffer size, with special markers
8945 indicating narrowing, and scrollbars which reflect only the
8948 Note that mini-buffers sometimes aren't displaying any text. */
8949 if (!MINI_WINDOW_P (w
)
8950 || (w
== XWINDOW (minibuf_window
)
8951 && NILP (echo_area_buffer
[0])))
8954 start
= marker_position (w
->start
) - BEGV
;
8955 /* I don't think this is guaranteed to be right. For the
8956 moment, we'll pretend it is. */
8957 end
= (Z
- XFASTINT (w
->window_end_pos
)) - BEGV
;
8961 if (whole
< (end
- start
))
8962 whole
= end
- start
;
8965 start
= end
= whole
= 0;
8967 /* Indicate what this scroll bar ought to be displaying now. */
8968 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
8970 /* Note that we actually used the scroll bar attached to this
8971 window, so it shouldn't be deleted at the end of redisplay. */
8972 (*redeem_scroll_bar_hook
) (w
);
8977 /* Restore current_buffer and value of point in it. */
8978 TEMP_SET_PT_BOTH (CHARPOS (opoint
), BYTEPOS (opoint
));
8979 if (really_switched_buffer
)
8980 set_buffer_internal_1 (old
);
8982 set_buffer_temp (old
);
8983 TEMP_SET_PT_BOTH (CHARPOS (lpoint
), BYTEPOS (lpoint
));
8985 unbind_to (count
, Qnil
);
8989 /* Build the complete desired matrix of WINDOW with a window start
8990 buffer position POS. Value is non-zero if successful. It is zero
8991 if fonts were loaded during redisplay which makes re-adjusting
8992 glyph matrices necessary. */
8995 try_window (window
, pos
)
8997 struct text_pos pos
;
8999 struct window
*w
= XWINDOW (window
);
9001 struct glyph_row
*last_text_row
= NULL
;
9003 /* Make POS the new window start. */
9004 set_marker_both (w
->start
, Qnil
, CHARPOS (pos
), BYTEPOS (pos
));
9006 /* Mark cursor position as unknown. No overlay arrow seen. */
9007 w
->cursor
.vpos
= -1;
9008 overlay_arrow_seen
= 0;
9010 /* Initialize iterator and info to start at POS. */
9011 start_display (&it
, w
, pos
);
9013 /* Display all lines of W. */
9014 while (it
.current_y
< it
.last_visible_y
)
9016 if (display_line (&it
))
9017 last_text_row
= it
.glyph_row
- 1;
9018 if (fonts_changed_p
)
9022 /* If bottom moved off end of frame, change mode line percentage. */
9023 if (XFASTINT (w
->window_end_pos
) <= 0
9024 && Z
!= IT_CHARPOS (it
))
9025 w
->update_mode_line
= Qt
;
9027 /* Set window_end_pos to the offset of the last character displayed
9028 on the window from the end of current_buffer. Set
9029 window_end_vpos to its row number. */
9032 xassert (MATRIX_ROW_DISPLAYS_TEXT_P (last_text_row
));
9033 w
->window_end_bytepos
9034 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
9035 XSETFASTINT (w
->window_end_pos
,
9036 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
9037 XSETFASTINT (w
->window_end_vpos
,
9038 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
9039 xassert (MATRIX_ROW (w
->desired_matrix
, XFASTINT (w
->window_end_vpos
))
9044 w
->window_end_bytepos
= 0;
9045 XSETFASTINT (w
->window_end_pos
, 0);
9046 XSETFASTINT (w
->window_end_vpos
, 0);
9049 /* But that is not valid info until redisplay finishes. */
9050 w
->window_end_valid
= Qnil
;
9056 /************************************************************************
9057 Window redisplay reusing current matrix when buffer has not changed
9058 ************************************************************************/
9060 /* Try redisplay of window W showing an unchanged buffer with a
9061 different window start than the last time it was displayed by
9062 reusing its current matrix. Value is non-zero if successful.
9063 W->start is the new window start. */
9066 try_window_reusing_current_matrix (w
)
9069 struct frame
*f
= XFRAME (w
->frame
);
9070 struct glyph_row
*row
, *bottom_row
;
9073 struct text_pos start
, new_start
;
9074 int nrows_scrolled
, i
;
9075 struct glyph_row
*last_text_row
;
9076 struct glyph_row
*last_reused_text_row
;
9077 struct glyph_row
*start_row
;
9078 int start_vpos
, min_y
, max_y
;
9080 /* Right now this function doesn't handle terminal frames. */
9081 if (!FRAME_WINDOW_P (f
))
9084 /* Can't do this if region may have changed. */
9085 if ((!NILP (Vtransient_mark_mode
)
9086 && !NILP (current_buffer
->mark_active
))
9087 || !NILP (w
->region_showing
)
9088 || !NILP (Vshow_trailing_whitespace
))
9091 /* If top-line visibility has changed, give up. */
9092 if (WINDOW_WANTS_HEADER_LINE_P (w
)
9093 != MATRIX_HEADER_LINE_ROW (w
->current_matrix
)->mode_line_p
)
9096 /* Give up if old or new display is scrolled vertically. We could
9097 make this function handle this, but right now it doesn't. */
9098 start_row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9099 if (w
->vscroll
|| MATRIX_ROW_PARTIALLY_VISIBLE_P (start_row
))
9102 /* The variable new_start now holds the new window start. The old
9103 start `start' can be determined from the current matrix. */
9104 SET_TEXT_POS_FROM_MARKER (new_start
, w
->start
);
9105 start
= start_row
->start
.pos
;
9106 start_vpos
= MATRIX_ROW_VPOS (start_row
, w
->current_matrix
);
9108 /* Clear the desired matrix for the display below. */
9109 clear_glyph_matrix (w
->desired_matrix
);
9111 if (CHARPOS (new_start
) <= CHARPOS (start
))
9115 IF_DEBUG (debug_method_add (w
, "twu1"));
9117 /* Display up to a row that can be reused. The variable
9118 last_text_row is set to the last row displayed that displays
9120 start_display (&it
, w
, new_start
);
9121 first_row_y
= it
.current_y
;
9122 w
->cursor
.vpos
= -1;
9123 last_text_row
= last_reused_text_row
= NULL
;
9124 while (it
.current_y
< it
.last_visible_y
9125 && IT_CHARPOS (it
) < CHARPOS (start
)
9126 && !fonts_changed_p
)
9127 if (display_line (&it
))
9128 last_text_row
= it
.glyph_row
- 1;
9130 /* A value of current_y < last_visible_y means that we stopped
9131 at the previous window start, which in turn means that we
9132 have at least one reusable row. */
9133 if (it
.current_y
< it
.last_visible_y
)
9135 nrows_scrolled
= it
.vpos
;
9137 /* Find PT if not already found in the lines displayed. */
9138 if (w
->cursor
.vpos
< 0)
9140 int dy
= it
.current_y
- first_row_y
;
9142 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9143 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
9145 if (PT
>= MATRIX_ROW_START_CHARPOS (row
)
9146 && PT
< MATRIX_ROW_END_CHARPOS (row
))
9148 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0,
9149 dy
, nrows_scrolled
);
9153 if (MATRIX_ROW_BOTTOM_Y (row
) + dy
>= it
.last_visible_y
)
9159 /* Give up if point was not found. This shouldn't
9160 happen often; not more often than with try_window
9162 if (w
->cursor
.vpos
< 0)
9164 clear_glyph_matrix (w
->desired_matrix
);
9169 /* Scroll the display. Do it before the current matrix is
9170 changed. The problem here is that update has not yet
9171 run, i.e. part of the current matrix is not up to date.
9172 scroll_run_hook will clear the cursor, and use the
9173 current matrix to get the height of the row the cursor is
9175 run
.current_y
= first_row_y
;
9176 run
.desired_y
= it
.current_y
;
9177 run
.height
= it
.last_visible_y
- it
.current_y
;
9181 rif
->update_window_begin_hook (w
);
9182 rif
->scroll_run_hook (w
, &run
);
9183 rif
->update_window_end_hook (w
, 0);
9187 /* Shift current matrix down by nrows_scrolled lines. */
9188 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
9189 rotate_matrix (w
->current_matrix
,
9191 MATRIX_ROW_VPOS (bottom_row
, w
->current_matrix
),
9194 /* Disable lines not reused. */
9195 for (i
= 0; i
< it
.vpos
; ++i
)
9196 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
9198 /* Re-compute Y positions. */
9199 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
) + nrows_scrolled
;
9200 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
9201 max_y
= it
.last_visible_y
;
9202 while (row
< bottom_row
)
9204 row
->y
= it
.current_y
;
9207 row
->visible_height
= row
->height
- (min_y
- row
->y
);
9208 else if (row
->y
+ row
->height
> max_y
)
9210 = row
->height
- (row
->y
+ row
->height
- max_y
);
9212 row
->visible_height
= row
->height
;
9214 it
.current_y
+= row
->height
;
9217 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
9218 last_reused_text_row
= row
;
9219 if (MATRIX_ROW_BOTTOM_Y (row
) >= it
.last_visible_y
)
9225 /* Update window_end_pos etc.; last_reused_text_row is the last
9226 reused row from the current matrix containing text, if any.
9227 The value of last_text_row is the last displayed line
9229 if (last_reused_text_row
)
9231 w
->window_end_bytepos
9232 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_reused_text_row
);
9233 XSETFASTINT (w
->window_end_pos
,
9234 Z
- MATRIX_ROW_END_CHARPOS (last_reused_text_row
));
9235 XSETFASTINT (w
->window_end_vpos
,
9236 MATRIX_ROW_VPOS (last_reused_text_row
,
9237 w
->current_matrix
));
9239 else if (last_text_row
)
9241 w
->window_end_bytepos
9242 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
9243 XSETFASTINT (w
->window_end_pos
,
9244 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
9245 XSETFASTINT (w
->window_end_vpos
,
9246 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
9250 /* This window must be completely empty. */
9251 w
->window_end_bytepos
= 0;
9252 XSETFASTINT (w
->window_end_pos
, 0);
9253 XSETFASTINT (w
->window_end_vpos
, 0);
9255 w
->window_end_valid
= Qnil
;
9257 /* Update hint: don't try scrolling again in update_window. */
9258 w
->desired_matrix
->no_scrolling_p
= 1;
9261 debug_method_add (w
, "try_window_reusing_current_matrix 1");
9265 else if (CHARPOS (new_start
) > CHARPOS (start
))
9267 struct glyph_row
*pt_row
, *row
;
9268 struct glyph_row
*first_reusable_row
;
9269 struct glyph_row
*first_row_to_display
;
9271 int yb
= window_text_bottom_y (w
);
9273 IF_DEBUG (debug_method_add (w
, "twu2"));
9275 /* Find the row starting at new_start, if there is one. Don't
9276 reuse a partially visible line at the end. */
9277 first_reusable_row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9278 while (first_reusable_row
->enabled_p
9279 && MATRIX_ROW_BOTTOM_Y (first_reusable_row
) < yb
9280 && (MATRIX_ROW_START_CHARPOS (first_reusable_row
)
9281 < CHARPOS (new_start
)))
9282 ++first_reusable_row
;
9284 /* Give up if there is no row to reuse. */
9285 if (MATRIX_ROW_BOTTOM_Y (first_reusable_row
) >= yb
9286 || !first_reusable_row
->enabled_p
9287 || (MATRIX_ROW_START_CHARPOS (first_reusable_row
)
9288 != CHARPOS (new_start
)))
9291 /* We can reuse fully visible rows beginning with
9292 first_reusable_row to the end of the window. Set
9293 first_row_to_display to the first row that cannot be reused.
9294 Set pt_row to the row containing point, if there is any. */
9295 first_row_to_display
= first_reusable_row
;
9297 while (MATRIX_ROW_BOTTOM_Y (first_row_to_display
) < yb
)
9299 if (PT
>= MATRIX_ROW_START_CHARPOS (first_row_to_display
)
9300 && PT
< MATRIX_ROW_END_CHARPOS (first_row_to_display
))
9301 pt_row
= first_row_to_display
;
9303 ++first_row_to_display
;
9306 /* Start displaying at the start of first_row_to_display. */
9307 xassert (first_row_to_display
->y
< yb
);
9308 init_to_row_start (&it
, w
, first_row_to_display
);
9309 nrows_scrolled
= MATRIX_ROW_VPOS (first_reusable_row
, w
->current_matrix
);
9310 it
.vpos
= (MATRIX_ROW_VPOS (first_row_to_display
, w
->current_matrix
)
9312 it
.current_y
= first_row_to_display
->y
- first_reusable_row
->y
;
9314 /* Display lines beginning with first_row_to_display in the
9315 desired matrix. Set last_text_row to the last row displayed
9316 that displays text. */
9317 it
.glyph_row
= MATRIX_ROW (w
->desired_matrix
, it
.vpos
);
9319 w
->cursor
.vpos
= -1;
9320 last_text_row
= NULL
;
9321 while (it
.current_y
< it
.last_visible_y
&& !fonts_changed_p
)
9322 if (display_line (&it
))
9323 last_text_row
= it
.glyph_row
- 1;
9325 /* Give up If point isn't in a row displayed or reused. */
9326 if (w
->cursor
.vpos
< 0)
9328 clear_glyph_matrix (w
->desired_matrix
);
9332 /* If point is in a reused row, adjust y and vpos of the cursor
9336 w
->cursor
.vpos
-= MATRIX_ROW_VPOS (first_reusable_row
,
9338 w
->cursor
.y
-= first_reusable_row
->y
;
9341 /* Scroll the display. */
9342 run
.current_y
= first_reusable_row
->y
;
9343 run
.desired_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
9344 run
.height
= it
.last_visible_y
- run
.current_y
;
9347 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
9349 rif
->update_window_begin_hook (w
);
9350 rif
->scroll_run_hook (w
, &run
);
9351 rif
->update_window_end_hook (w
, 0);
9355 /* Adjust Y positions of reused rows. */
9356 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
9357 row
= first_reusable_row
;
9358 dy
= first_reusable_row
->y
;
9359 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
9360 max_y
= it
.last_visible_y
;
9361 while (row
< first_row_to_display
)
9365 row
->visible_height
= row
->height
- (min_y
- row
->y
);
9366 else if (row
->y
+ row
->height
> max_y
)
9368 = row
->height
- (row
->y
+ row
->height
- max_y
);
9370 row
->visible_height
= row
->height
;
9374 /* Disable rows not reused. */
9375 while (row
< bottom_row
)
9381 /* Scroll the current matrix. */
9382 xassert (nrows_scrolled
> 0);
9383 rotate_matrix (w
->current_matrix
,
9385 MATRIX_ROW_VPOS (bottom_row
, w
->current_matrix
),
9388 /* Adjust window end. A null value of last_text_row means that
9389 the window end is in reused rows which in turn means that
9390 only its vpos can have changed. */
9393 w
->window_end_bytepos
9394 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
9395 XSETFASTINT (w
->window_end_pos
,
9396 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
9397 XSETFASTINT (w
->window_end_vpos
,
9398 MATRIX_ROW_VPOS (last_text_row
, w
->desired_matrix
));
9402 XSETFASTINT (w
->window_end_vpos
,
9403 XFASTINT (w
->window_end_vpos
) - nrows_scrolled
);
9406 w
->window_end_valid
= Qnil
;
9407 w
->desired_matrix
->no_scrolling_p
= 1;
9410 debug_method_add (w
, "try_window_reusing_current_matrix 2");
9420 /************************************************************************
9421 Window redisplay reusing current matrix when buffer has changed
9422 ************************************************************************/
9424 static struct glyph_row
*get_last_unchanged_at_beg_row
P_ ((struct window
*));
9425 static struct glyph_row
*get_first_unchanged_at_end_row
P_ ((struct window
*,
9427 static struct glyph_row
*
9428 find_last_row_displaying_text
P_ ((struct glyph_matrix
*, struct it
*,
9429 struct glyph_row
*));
9432 /* Return the last row in MATRIX displaying text. If row START is
9433 non-null, start searching with that row. IT gives the dimensions
9434 of the display. Value is null if matrix is empty; otherwise it is
9435 a pointer to the row found. */
9437 static struct glyph_row
*
9438 find_last_row_displaying_text (matrix
, it
, start
)
9439 struct glyph_matrix
*matrix
;
9441 struct glyph_row
*start
;
9443 struct glyph_row
*row
, *row_found
;
9445 /* Set row_found to the last row in IT->w's current matrix
9446 displaying text. The loop looks funny but think of partially
9449 row
= start
? start
: MATRIX_FIRST_TEXT_ROW (matrix
);
9450 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
9452 xassert (row
->enabled_p
);
9454 if (MATRIX_ROW_BOTTOM_Y (row
) >= it
->last_visible_y
)
9463 /* Return the last row in the current matrix of W that is not affected
9464 by changes at the start of current_buffer that occurred since the
9465 last time W was redisplayed. Value is null if no such row exists.
9467 The global variable beg_unchanged has to contain the number of
9468 bytes unchanged at the start of current_buffer. BEG +
9469 beg_unchanged is the buffer position of the first changed byte in
9470 current_buffer. Characters at positions < BEG + beg_unchanged are
9471 at the same buffer positions as they were when the current matrix
9474 static struct glyph_row
*
9475 get_last_unchanged_at_beg_row (w
)
9478 int first_changed_pos
= BEG
+ BEG_UNCHANGED
;
9479 struct glyph_row
*row
;
9480 struct glyph_row
*row_found
= NULL
;
9481 int yb
= window_text_bottom_y (w
);
9483 /* Find the last row displaying unchanged text. */
9484 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9485 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
9486 && MATRIX_ROW_START_CHARPOS (row
) < first_changed_pos
)
9488 if (/* If row ends before first_changed_pos, it is unchanged,
9489 except in some case. */
9490 MATRIX_ROW_END_CHARPOS (row
) <= first_changed_pos
9491 /* When row ends in ZV and we write at ZV it is not
9493 && !row
->ends_at_zv_p
9494 /* When first_changed_pos is the end of a continued line,
9495 row is not unchanged because it may be no longer
9497 && !(MATRIX_ROW_END_CHARPOS (row
) == first_changed_pos
9498 && row
->continued_p
))
9501 /* Stop if last visible row. */
9502 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
9512 /* Find the first glyph row in the current matrix of W that is not
9513 affected by changes at the end of current_buffer since the last
9514 time the window was redisplayed. Return in *DELTA the number of
9515 chars by which buffer positions in unchanged text at the end of
9516 current_buffer must be adjusted. Return in *DELTA_BYTES the
9517 corresponding number of bytes. Value is null if no such row
9518 exists, i.e. all rows are affected by changes. */
9520 static struct glyph_row
*
9521 get_first_unchanged_at_end_row (w
, delta
, delta_bytes
)
9523 int *delta
, *delta_bytes
;
9525 struct glyph_row
*row
;
9526 struct glyph_row
*row_found
= NULL
;
9528 *delta
= *delta_bytes
= 0;
9530 /* A value of window_end_pos >= end_unchanged means that the window
9531 end is in the range of changed text. If so, there is no
9532 unchanged row at the end of W's current matrix. */
9533 xassert (!NILP (w
->window_end_valid
));
9534 if (XFASTINT (w
->window_end_pos
) >= END_UNCHANGED
)
9537 /* Set row to the last row in W's current matrix displaying text. */
9538 row
= MATRIX_ROW (w
->current_matrix
, XFASTINT (w
->window_end_vpos
));
9540 /* If matrix is entirely empty, no unchanged row exists. */
9541 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
9543 /* The value of row is the last glyph row in the matrix having a
9544 meaningful buffer position in it. The end position of row
9545 corresponds to window_end_pos. This allows us to translate
9546 buffer positions in the current matrix to current buffer
9547 positions for characters not in changed text. */
9548 int Z_old
= MATRIX_ROW_END_CHARPOS (row
) + XFASTINT (w
->window_end_pos
);
9549 int Z_BYTE_old
= MATRIX_ROW_END_BYTEPOS (row
) + w
->window_end_bytepos
;
9550 int last_unchanged_pos
, last_unchanged_pos_old
;
9551 struct glyph_row
*first_text_row
9552 = MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9555 *delta_bytes
= Z_BYTE
- Z_BYTE_old
;
9557 /* Set last_unchanged_pos to the buffer position of the last
9558 character in the buffer that has not been changed. Z is the
9559 index + 1 of the last byte in current_buffer, i.e. by
9560 subtracting end_unchanged we get the index of the last
9561 unchanged character, and we have to add BEG to get its buffer
9563 last_unchanged_pos
= Z
- END_UNCHANGED
+ BEG
;
9564 last_unchanged_pos_old
= last_unchanged_pos
- *delta
;
9566 /* Search backward from ROW for a row displaying a line that
9567 starts at a minimum position >= last_unchanged_pos_old. */
9568 while (row
>= first_text_row
)
9570 xassert (row
->enabled_p
);
9571 xassert (MATRIX_ROW_DISPLAYS_TEXT_P (row
));
9573 if (MATRIX_ROW_START_CHARPOS (row
) >= last_unchanged_pos_old
)
9579 xassert (!row_found
|| MATRIX_ROW_DISPLAYS_TEXT_P (row_found
));
9584 /* Make sure that glyph rows in the current matrix of window W
9585 reference the same glyph memory as corresponding rows in the
9586 frame's frame matrix. This function is called after scrolling W's
9587 current matrix on a terminal frame in try_window_id and
9588 try_window_reusing_current_matrix. */
9591 sync_frame_with_window_matrix_rows (w
)
9594 struct frame
*f
= XFRAME (w
->frame
);
9595 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
9597 /* Preconditions: W must be a leaf window and full-width. Its frame
9598 must have a frame matrix. */
9599 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
9600 xassert (WINDOW_FULL_WIDTH_P (w
));
9601 xassert (!FRAME_WINDOW_P (f
));
9603 /* If W is a full-width window, glyph pointers in W's current matrix
9604 have, by definition, to be the same as glyph pointers in the
9605 corresponding frame matrix. */
9606 window_row
= w
->current_matrix
->rows
;
9607 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
9608 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
9609 while (window_row
< window_row_end
)
9612 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
9613 frame_row
->glyphs
[area
] = window_row
->glyphs
[area
];
9614 ++window_row
, ++frame_row
;
9619 /* Find the glyph row in window W containing CHARPOS. Consider all
9620 rows between START and END (not inclusive). END null means search
9621 all rows to the end of the display area of W. Value is the row
9622 containing CHARPOS or null. */
9624 static struct glyph_row
*
9625 row_containing_pos (w
, charpos
, start
, end
)
9628 struct glyph_row
*start
, *end
;
9630 struct glyph_row
*row
= start
;
9633 /* If we happen to start on a header-line, skip that. */
9634 if (row
->mode_line_p
)
9637 if ((end
&& row
>= end
) || !row
->enabled_p
)
9640 last_y
= window_text_bottom_y (w
);
9642 while ((end
== NULL
|| row
< end
)
9643 && (MATRIX_ROW_END_CHARPOS (row
) < charpos
9644 /* The end position of a row equals the start
9645 position of the next row. If CHARPOS is there, we
9646 would rather display it in the next line, except
9647 when this line ends in ZV. */
9648 || (MATRIX_ROW_END_CHARPOS (row
) == charpos
9649 && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)
9650 || !row
->ends_at_zv_p
)))
9651 && MATRIX_ROW_BOTTOM_Y (row
) < last_y
)
9654 /* Give up if CHARPOS not found. */
9655 if ((end
&& row
>= end
)
9656 || charpos
< MATRIX_ROW_START_CHARPOS (row
)
9657 || charpos
> MATRIX_ROW_END_CHARPOS (row
))
9664 /* Try to redisplay window W by reusing its existing display. W's
9665 current matrix must be up to date when this function is called,
9666 i.e. window_end_valid must not be nil.
9670 1 if display has been updated
9671 0 if otherwise unsuccessful
9672 -1 if redisplay with same window start is known not to succeed
9674 The following steps are performed:
9676 1. Find the last row in the current matrix of W that is not
9677 affected by changes at the start of current_buffer. If no such row
9680 2. Find the first row in W's current matrix that is not affected by
9681 changes at the end of current_buffer. Maybe there is no such row.
9683 3. Display lines beginning with the row + 1 found in step 1 to the
9684 row found in step 2 or, if step 2 didn't find a row, to the end of
9687 4. If cursor is not known to appear on the window, give up.
9689 5. If display stopped at the row found in step 2, scroll the
9690 display and current matrix as needed.
9692 6. Maybe display some lines at the end of W, if we must. This can
9693 happen under various circumstances, like a partially visible line
9694 becoming fully visible, or because newly displayed lines are displayed
9695 in smaller font sizes.
9697 7. Update W's window end information. */
9699 /* Check that window end is what we expect it to be. */
9705 struct frame
*f
= XFRAME (w
->frame
);
9706 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
9707 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
9708 struct glyph_row
*last_unchanged_at_beg_row
;
9709 struct glyph_row
*first_unchanged_at_end_row
;
9710 struct glyph_row
*row
;
9711 struct glyph_row
*bottom_row
;
9714 int delta
= 0, delta_bytes
= 0, stop_pos
, dvpos
, dy
;
9715 struct text_pos start_pos
;
9717 int first_unchanged_at_end_vpos
= 0;
9718 struct glyph_row
*last_text_row
, *last_text_row_at_end
;
9719 struct text_pos start
;
9721 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
9723 /* Check pre-conditions. Window end must be valid, otherwise
9724 the current matrix would not be up to date. */
9725 xassert (!NILP (w
->window_end_valid
));
9726 xassert (FRAME_WINDOW_P (XFRAME (w
->frame
))
9727 || (line_ins_del_ok
&& WINDOW_FULL_WIDTH_P (w
)));
9729 /* Make sure beg_unchanged and end_unchanged are up to date. Do it
9730 only if buffer has really changed. The reason is that the gap is
9731 initially at Z for freshly visited files. The code below would
9732 set end_unchanged to 0 in that case. */
9733 if (MODIFF
> SAVE_MODIFF
)
9735 if (GPT
- BEG
< BEG_UNCHANGED
)
9736 BEG_UNCHANGED
= GPT
- BEG
;
9737 if (Z
- GPT
< END_UNCHANGED
)
9738 END_UNCHANGED
= Z
- GPT
;
9741 /* If window starts after a line end, and the last change is in
9742 front of that newline, then changes don't affect the display.
9743 This case happens with stealth-fontification. */
9744 row
= MATRIX_ROW (w
->current_matrix
, XFASTINT (w
->window_end_vpos
));
9745 if (CHARPOS (start
) > BEGV
9746 && Z
- END_UNCHANGED
< CHARPOS (start
) - 1
9747 && FETCH_BYTE (BYTEPOS (start
) - 1) == '\n'
9748 && PT
< MATRIX_ROW_END_CHARPOS (row
))
9750 /* We have to update window end positions because the buffer's
9751 size has changed. */
9753 = make_number (Z
- MATRIX_ROW_END_CHARPOS (row
));
9754 w
->window_end_bytepos
9755 = make_number (Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
));
9759 /* Return quickly if changes are all below what is displayed in the
9760 window, and if PT is in the window. */
9761 if (BEG_UNCHANGED
> MATRIX_ROW_END_CHARPOS (row
)
9762 && PT
< MATRIX_ROW_END_CHARPOS (row
))
9764 /* We have to update window end positions because the buffer's
9765 size has changed. */
9767 = make_number (Z
- MATRIX_ROW_END_CHARPOS (row
));
9768 w
->window_end_bytepos
9769 = make_number (Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
));
9773 /* Check that window start agrees with the start of the first glyph
9774 row in its current matrix. Check this after we know the window
9775 start is not in changed text, otherwise positions would not be
9777 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
9778 if (!TEXT_POS_EQUAL_P (start
, row
->start
.pos
))
9781 /* Compute the position at which we have to start displaying new
9782 lines. Some of the lines at the top of the window might be
9783 reusable because they are not displaying changed text. Find the
9784 last row in W's current matrix not affected by changes at the
9785 start of current_buffer. Value is null if changes start in the
9786 first line of window. */
9787 last_unchanged_at_beg_row
= get_last_unchanged_at_beg_row (w
);
9788 if (last_unchanged_at_beg_row
)
9790 init_to_row_end (&it
, w
, last_unchanged_at_beg_row
);
9791 start_pos
= it
.current
.pos
;
9793 /* Start displaying new lines in the desired matrix at the same
9794 vpos we would use in the current matrix, i.e. below
9795 last_unchanged_at_beg_row. */
9796 it
.vpos
= 1 + MATRIX_ROW_VPOS (last_unchanged_at_beg_row
,
9798 it
.glyph_row
= MATRIX_ROW (desired_matrix
, it
.vpos
);
9799 it
.current_y
= MATRIX_ROW_BOTTOM_Y (last_unchanged_at_beg_row
);
9801 xassert (it
.hpos
== 0 && it
.current_x
== 0);
9805 /* There are no reusable lines at the start of the window.
9806 Start displaying in the first line. */
9807 start_display (&it
, w
, start
);
9808 start_pos
= it
.current
.pos
;
9811 /* Find the first row that is not affected by changes at the end of
9812 the buffer. Value will be null if there is no unchanged row, in
9813 which case we must redisplay to the end of the window. delta
9814 will be set to the value by which buffer positions beginning with
9815 first_unchanged_at_end_row have to be adjusted due to text
9817 first_unchanged_at_end_row
9818 = get_first_unchanged_at_end_row (w
, &delta
, &delta_bytes
);
9819 IF_DEBUG (debug_delta
= delta
);
9820 IF_DEBUG (debug_delta_bytes
= delta_bytes
);
9822 /* Set stop_pos to the buffer position up to which we will have to
9823 display new lines. If first_unchanged_at_end_row != NULL, this
9824 is the buffer position of the start of the line displayed in that
9825 row. For first_unchanged_at_end_row == NULL, use 0 to indicate
9826 that we don't stop at a buffer position. */
9828 if (first_unchanged_at_end_row
)
9830 xassert (last_unchanged_at_beg_row
== NULL
9831 || first_unchanged_at_end_row
>= last_unchanged_at_beg_row
);
9833 /* If this is a continuation line, move forward to the next one
9834 that isn't. Changes in lines above affect this line.
9835 Caution: this may move first_unchanged_at_end_row to a row
9836 not displaying text. */
9837 while (MATRIX_ROW_CONTINUATION_LINE_P (first_unchanged_at_end_row
)
9838 && MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
)
9839 && (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row
)
9840 < it
.last_visible_y
))
9841 ++first_unchanged_at_end_row
;
9843 if (!MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
)
9844 || (MATRIX_ROW_BOTTOM_Y (first_unchanged_at_end_row
)
9845 >= it
.last_visible_y
))
9846 first_unchanged_at_end_row
= NULL
;
9849 stop_pos
= (MATRIX_ROW_START_CHARPOS (first_unchanged_at_end_row
)
9851 first_unchanged_at_end_vpos
9852 = MATRIX_ROW_VPOS (first_unchanged_at_end_row
, current_matrix
);
9853 xassert (stop_pos
>= Z
- END_UNCHANGED
);
9856 else if (last_unchanged_at_beg_row
== NULL
)
9862 /* Either there is no unchanged row at the end, or the one we have
9863 now displays text. This is a necessary condition for the window
9864 end pos calculation at the end of this function. */
9865 xassert (first_unchanged_at_end_row
== NULL
9866 || MATRIX_ROW_DISPLAYS_TEXT_P (first_unchanged_at_end_row
));
9868 debug_last_unchanged_at_beg_vpos
9869 = (last_unchanged_at_beg_row
9870 ? MATRIX_ROW_VPOS (last_unchanged_at_beg_row
, current_matrix
)
9872 debug_first_unchanged_at_end_vpos
= first_unchanged_at_end_vpos
;
9874 #endif /* GLYPH_DEBUG != 0 */
9877 /* Display new lines. Set last_text_row to the last new line
9878 displayed which has text on it, i.e. might end up as being the
9879 line where the window_end_vpos is. */
9880 w
->cursor
.vpos
= -1;
9881 last_text_row
= NULL
;
9882 overlay_arrow_seen
= 0;
9883 while (it
.current_y
< it
.last_visible_y
9885 && (first_unchanged_at_end_row
== NULL
9886 || IT_CHARPOS (it
) < stop_pos
))
9888 if (display_line (&it
))
9889 last_text_row
= it
.glyph_row
- 1;
9892 if (fonts_changed_p
)
9896 /* Compute differences in buffer positions, y-positions etc. for
9897 lines reused at the bottom of the window. Compute what we can
9899 if (first_unchanged_at_end_row
9900 /* No lines reused because we displayed everything up to the
9901 bottom of the window. */
9902 && it
.current_y
< it
.last_visible_y
)
9905 - MATRIX_ROW_VPOS (first_unchanged_at_end_row
,
9907 dy
= it
.current_y
- first_unchanged_at_end_row
->y
;
9908 run
.current_y
= first_unchanged_at_end_row
->y
;
9909 run
.desired_y
= run
.current_y
+ dy
;
9910 run
.height
= it
.last_visible_y
- max (run
.current_y
, run
.desired_y
);
9914 delta
= dvpos
= dy
= run
.current_y
= run
.desired_y
= run
.height
= 0;
9915 first_unchanged_at_end_row
= NULL
;
9917 IF_DEBUG (debug_dvpos
= dvpos
; debug_dy
= dy
);
9920 /* Find the cursor if not already found. We have to decide whether
9921 PT will appear on this window (it sometimes doesn't, but this is
9922 not a very frequent case.) This decision has to be made before
9923 the current matrix is altered. A value of cursor.vpos < 0 means
9924 that PT is either in one of the lines beginning at
9925 first_unchanged_at_end_row or below the window. Don't care for
9926 lines that might be displayed later at the window end; as
9927 mentioned, this is not a frequent case. */
9928 if (w
->cursor
.vpos
< 0)
9930 int last_y
= min (it
.last_visible_y
, it
.last_visible_y
+ dy
);
9932 /* Cursor in unchanged rows at the top? */
9933 if (PT
< CHARPOS (start_pos
)
9934 && last_unchanged_at_beg_row
)
9936 row
= row_containing_pos (w
, PT
,
9937 MATRIX_FIRST_TEXT_ROW (w
->current_matrix
),
9938 last_unchanged_at_beg_row
+ 1);
9939 xassert (row
&& row
<= last_unchanged_at_beg_row
);
9940 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
9943 /* Start from first_unchanged_at_end_row looking for PT. */
9944 else if (first_unchanged_at_end_row
)
9946 row
= row_containing_pos (w
, PT
- delta
,
9947 first_unchanged_at_end_row
, NULL
);
9949 set_cursor_from_row (w
, row
, w
->current_matrix
, delta
,
9950 delta_bytes
, dy
, dvpos
);
9953 /* Give up if cursor was not found. */
9954 if (w
->cursor
.vpos
< 0)
9956 clear_glyph_matrix (w
->desired_matrix
);
9961 /* Don't let the cursor end in the scroll margins. */
9963 int this_scroll_margin
, cursor_height
;
9965 this_scroll_margin
= max (0, scroll_margin
);
9966 this_scroll_margin
= min (this_scroll_margin
,
9967 XFASTINT (w
->height
) / 4);
9968 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
9969 cursor_height
= MATRIX_ROW (w
->desired_matrix
, w
->cursor
.vpos
)->height
;
9971 if ((w
->cursor
.y
< this_scroll_margin
9972 && CHARPOS (start
) > BEGV
)
9973 /* Don't take scroll margin into account at the bottom because
9974 old redisplay didn't do it either. */
9975 || w
->cursor
.y
+ cursor_height
> it
.last_visible_y
)
9977 w
->cursor
.vpos
= -1;
9978 clear_glyph_matrix (w
->desired_matrix
);
9983 /* Scroll the display. Do it before changing the current matrix so
9984 that xterm.c doesn't get confused about where the cursor glyph is
9990 if (FRAME_WINDOW_P (f
))
9992 rif
->update_window_begin_hook (w
);
9993 rif
->scroll_run_hook (w
, &run
);
9994 rif
->update_window_end_hook (w
, 0);
9998 /* Terminal frame. In this case, dvpos gives the number of
9999 lines to scroll by; dvpos < 0 means scroll up. */
10000 int first_unchanged_at_end_vpos
10001 = MATRIX_ROW_VPOS (first_unchanged_at_end_row
, w
->current_matrix
);
10002 int from
= XFASTINT (w
->top
) + first_unchanged_at_end_vpos
;
10003 int end
= XFASTINT (w
->top
) + window_internal_height (w
);
10005 /* Perform the operation on the screen. */
10008 /* Scroll last_unchanged_at_beg_row to the end of the
10009 window down dvpos lines. */
10010 set_terminal_window (end
);
10012 /* On dumb terminals delete dvpos lines at the end
10013 before inserting dvpos empty lines. */
10014 if (!scroll_region_ok
)
10015 ins_del_lines (end
- dvpos
, -dvpos
);
10017 /* Insert dvpos empty lines in front of
10018 last_unchanged_at_beg_row. */
10019 ins_del_lines (from
, dvpos
);
10021 else if (dvpos
< 0)
10023 /* Scroll up last_unchanged_at_beg_vpos to the end of
10024 the window to last_unchanged_at_beg_vpos - |dvpos|. */
10025 set_terminal_window (end
);
10027 /* Delete dvpos lines in front of
10028 last_unchanged_at_beg_vpos. ins_del_lines will set
10029 the cursor to the given vpos and emit |dvpos| delete
10031 ins_del_lines (from
+ dvpos
, dvpos
);
10033 /* On a dumb terminal insert dvpos empty lines at the
10035 if (!scroll_region_ok
)
10036 ins_del_lines (end
+ dvpos
, -dvpos
);
10039 set_terminal_window (0);
10045 /* Shift reused rows of the current matrix to the right position.
10046 BOTTOM_ROW is the last + 1 row in the current matrix reserved for
10048 bottom_row
= MATRIX_BOTTOM_TEXT_ROW (current_matrix
, w
);
10049 bottom_vpos
= MATRIX_ROW_VPOS (bottom_row
, current_matrix
);
10052 rotate_matrix (current_matrix
, first_unchanged_at_end_vpos
+ dvpos
,
10053 bottom_vpos
, dvpos
);
10054 enable_glyph_matrix_rows (current_matrix
, bottom_vpos
+ dvpos
,
10057 else if (dvpos
> 0)
10059 rotate_matrix (current_matrix
, first_unchanged_at_end_vpos
,
10060 bottom_vpos
, dvpos
);
10061 enable_glyph_matrix_rows (current_matrix
, first_unchanged_at_end_vpos
,
10062 first_unchanged_at_end_vpos
+ dvpos
, 0);
10065 /* For frame-based redisplay, make sure that current frame and window
10066 matrix are in sync with respect to glyph memory. */
10067 if (!FRAME_WINDOW_P (f
))
10068 sync_frame_with_window_matrix_rows (w
);
10070 /* Adjust buffer positions in reused rows. */
10072 increment_glyph_matrix_buffer_positions (current_matrix
,
10073 first_unchanged_at_end_vpos
+ dvpos
,
10074 bottom_vpos
, delta
, delta_bytes
);
10076 /* Adjust Y positions. */
10078 shift_glyph_matrix (w
, current_matrix
,
10079 first_unchanged_at_end_vpos
+ dvpos
,
10082 if (first_unchanged_at_end_row
)
10083 first_unchanged_at_end_row
+= dvpos
;
10085 /* If scrolling up, there may be some lines to display at the end of
10087 last_text_row_at_end
= NULL
;
10090 /* Set last_row to the glyph row in the current matrix where the
10091 window end line is found. It has been moved up or down in
10092 the matrix by dvpos. */
10093 int last_vpos
= XFASTINT (w
->window_end_vpos
) + dvpos
;
10094 struct glyph_row
*last_row
= MATRIX_ROW (current_matrix
, last_vpos
);
10096 /* If last_row is the window end line, it should display text. */
10097 xassert (last_row
->displays_text_p
);
10099 /* If window end line was partially visible before, begin
10100 displaying at that line. Otherwise begin displaying with the
10101 line following it. */
10102 if (MATRIX_ROW_BOTTOM_Y (last_row
) - dy
>= it
.last_visible_y
)
10104 init_to_row_start (&it
, w
, last_row
);
10105 it
.vpos
= last_vpos
;
10106 it
.current_y
= last_row
->y
;
10110 init_to_row_end (&it
, w
, last_row
);
10111 it
.vpos
= 1 + last_vpos
;
10112 it
.current_y
= MATRIX_ROW_BOTTOM_Y (last_row
);
10116 /* We may start in a continuation line. If so, we have to get
10117 the right continuation_lines_width and current_x. */
10118 it
.continuation_lines_width
= last_row
->continuation_lines_width
;
10119 it
.hpos
= it
.current_x
= 0;
10121 /* Display the rest of the lines at the window end. */
10122 it
.glyph_row
= MATRIX_ROW (desired_matrix
, it
.vpos
);
10123 while (it
.current_y
< it
.last_visible_y
10124 && !fonts_changed_p
)
10126 /* Is it always sure that the display agrees with lines in
10127 the current matrix? I don't think so, so we mark rows
10128 displayed invalid in the current matrix by setting their
10129 enabled_p flag to zero. */
10130 MATRIX_ROW (w
->current_matrix
, it
.vpos
)->enabled_p
= 0;
10131 if (display_line (&it
))
10132 last_text_row_at_end
= it
.glyph_row
- 1;
10136 /* Update window_end_pos and window_end_vpos. */
10137 if (first_unchanged_at_end_row
10138 && first_unchanged_at_end_row
->y
< it
.last_visible_y
10139 && !last_text_row_at_end
)
10141 /* Window end line if one of the preserved rows from the current
10142 matrix. Set row to the last row displaying text in current
10143 matrix starting at first_unchanged_at_end_row, after
10145 xassert (first_unchanged_at_end_row
->displays_text_p
);
10146 row
= find_last_row_displaying_text (w
->current_matrix
, &it
,
10147 first_unchanged_at_end_row
);
10148 xassert (row
&& MATRIX_ROW_DISPLAYS_TEXT_P (row
));
10150 XSETFASTINT (w
->window_end_pos
, Z
- MATRIX_ROW_END_CHARPOS (row
));
10151 w
->window_end_bytepos
= Z_BYTE
- MATRIX_ROW_END_BYTEPOS (row
);
10152 XSETFASTINT (w
->window_end_vpos
,
10153 MATRIX_ROW_VPOS (row
, w
->current_matrix
));
10155 else if (last_text_row_at_end
)
10157 XSETFASTINT (w
->window_end_pos
,
10158 Z
- MATRIX_ROW_END_CHARPOS (last_text_row_at_end
));
10159 w
->window_end_bytepos
10160 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row_at_end
);
10161 XSETFASTINT (w
->window_end_vpos
,
10162 MATRIX_ROW_VPOS (last_text_row_at_end
, desired_matrix
));
10164 else if (last_text_row
)
10166 /* We have displayed either to the end of the window or at the
10167 end of the window, i.e. the last row with text is to be found
10168 in the desired matrix. */
10169 XSETFASTINT (w
->window_end_pos
,
10170 Z
- MATRIX_ROW_END_CHARPOS (last_text_row
));
10171 w
->window_end_bytepos
10172 = Z_BYTE
- MATRIX_ROW_END_BYTEPOS (last_text_row
);
10173 XSETFASTINT (w
->window_end_vpos
,
10174 MATRIX_ROW_VPOS (last_text_row
, desired_matrix
));
10176 else if (first_unchanged_at_end_row
== NULL
10177 && last_text_row
== NULL
10178 && last_text_row_at_end
== NULL
)
10180 /* Displayed to end of window, but no line containing text was
10181 displayed. Lines were deleted at the end of the window. */
10183 int header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0;
10185 for (vpos
= XFASTINT (w
->window_end_vpos
); vpos
> 0; --vpos
)
10186 if ((w
->desired_matrix
->rows
[vpos
+ header_line_p
].enabled_p
10187 && w
->desired_matrix
->rows
[vpos
+ header_line_p
].displays_text_p
)
10188 || (!w
->desired_matrix
->rows
[vpos
+ header_line_p
].enabled_p
10189 && w
->current_matrix
->rows
[vpos
+ header_line_p
].displays_text_p
))
10192 w
->window_end_vpos
= make_number (vpos
);
10197 IF_DEBUG (debug_end_pos
= XFASTINT (w
->window_end_pos
);
10198 debug_end_vpos
= XFASTINT (w
->window_end_vpos
));
10200 /* Record that display has not been completed. */
10201 w
->window_end_valid
= Qnil
;
10202 w
->desired_matrix
->no_scrolling_p
= 1;
10208 /***********************************************************************
10209 More debugging support
10210 ***********************************************************************/
10214 void dump_glyph_row
P_ ((struct glyph_matrix
*, int, int));
10215 static void dump_glyph_matrix
P_ ((struct glyph_matrix
*, int));
10218 /* Dump the contents of glyph matrix MATRIX on stderr. If
10219 WITH_GLYPHS_P is non-zero, dump glyph contents as well. */
10222 dump_glyph_matrix (matrix
, with_glyphs_p
)
10223 struct glyph_matrix
*matrix
;
10227 for (i
= 0; i
< matrix
->nrows
; ++i
)
10228 dump_glyph_row (matrix
, i
, with_glyphs_p
);
10232 /* Dump the contents of glyph row at VPOS in MATRIX to stderr.
10233 WITH_GLYPH_SP non-zero means dump glyph contents, too. */
10236 dump_glyph_row (matrix
, vpos
, with_glyphs_p
)
10237 struct glyph_matrix
*matrix
;
10238 int vpos
, with_glyphs_p
;
10240 struct glyph_row
*row
;
10242 if (vpos
< 0 || vpos
>= matrix
->nrows
)
10245 row
= MATRIX_ROW (matrix
, vpos
);
10247 fprintf (stderr
, "Row Start End Used oEI><O\\CTZF X Y W\n");
10248 fprintf (stderr
, "=============================================\n");
10250 fprintf (stderr
, "%3d %5d %5d %4d %1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d%1.1d %4d %4d %4d\n",
10251 row
- matrix
->rows
,
10252 MATRIX_ROW_START_CHARPOS (row
),
10253 MATRIX_ROW_END_CHARPOS (row
),
10254 row
->used
[TEXT_AREA
],
10255 row
->contains_overlapping_glyphs_p
,
10258 row
->truncated_on_left_p
,
10259 row
->truncated_on_right_p
,
10260 row
->overlay_arrow_p
,
10262 MATRIX_ROW_CONTINUATION_LINE_P (row
),
10263 row
->displays_text_p
,
10269 fprintf (stderr
, "%9d %5d\n", row
->start
.overlay_string_index
,
10270 row
->end
.overlay_string_index
);
10271 fprintf (stderr
, "%9d %5d\n",
10272 CHARPOS (row
->start
.string_pos
),
10273 CHARPOS (row
->end
.string_pos
));
10274 fprintf (stderr
, "%9d %5d\n", row
->start
.dpvec_index
,
10275 row
->end
.dpvec_index
);
10279 struct glyph
*glyph
, *glyph_end
;
10280 int prev_had_glyphs_p
;
10282 glyph
= row
->glyphs
[TEXT_AREA
];
10283 glyph_end
= glyph
+ row
->used
[TEXT_AREA
];
10285 /* Glyph for a line end in text. */
10286 if (glyph
== glyph_end
&& glyph
->charpos
> 0)
10289 if (glyph
< glyph_end
)
10291 fprintf (stderr
, " Glyph Type Pos W Code C Face LR\n");
10292 prev_had_glyphs_p
= 1;
10295 prev_had_glyphs_p
= 0;
10297 while (glyph
< glyph_end
)
10299 if (glyph
->type
== CHAR_GLYPH
)
10302 " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n",
10303 glyph
- row
->glyphs
[TEXT_AREA
],
10306 glyph
->pixel_width
,
10308 (glyph
->u
.ch
.code
< 0x80 && glyph
->u
.ch
.code
>= ' '
10311 glyph
->u
.ch
.face_id
,
10312 glyph
->left_box_line_p
,
10313 glyph
->right_box_line_p
);
10315 else if (glyph
->type
== STRETCH_GLYPH
)
10318 " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n",
10319 glyph
- row
->glyphs
[TEXT_AREA
],
10322 glyph
->pixel_width
,
10325 glyph
->u
.stretch
.face_id
,
10326 glyph
->left_box_line_p
,
10327 glyph
->right_box_line_p
);
10329 else if (glyph
->type
== IMAGE_GLYPH
)
10332 " %5d %4c %6d %3d 0x%05x %c %4d %1.1d%1.1d\n",
10333 glyph
- row
->glyphs
[TEXT_AREA
],
10336 glyph
->pixel_width
,
10339 glyph
->u
.img
.face_id
,
10340 glyph
->left_box_line_p
,
10341 glyph
->right_box_line_p
);
10349 DEFUN ("dump-glyph-matrix", Fdump_glyph_matrix
,
10350 Sdump_glyph_matrix
, 0, 1, "p",
10351 "Dump the current matrix of the selected window to stderr.\n\
10352 Shows contents of glyph row structures. With non-nil optional\n\
10353 parameter WITH-GLYPHS-P, dump glyphs as well.")
10356 struct window
*w
= XWINDOW (selected_window
);
10357 struct buffer
*buffer
= XBUFFER (w
->buffer
);
10359 fprintf (stderr
, "PT = %d, BEGV = %d. ZV = %d\n",
10360 BUF_PT (buffer
), BUF_BEGV (buffer
), BUF_ZV (buffer
));
10361 fprintf (stderr
, "Cursor x = %d, y = %d, hpos = %d, vpos = %d\n",
10362 w
->cursor
.x
, w
->cursor
.y
, w
->cursor
.hpos
, w
->cursor
.vpos
);
10363 fprintf (stderr
, "=============================================\n");
10364 dump_glyph_matrix (w
->current_matrix
, !NILP (with_glyphs_p
));
10369 DEFUN ("dump-glyph-row", Fdump_glyph_row
, Sdump_glyph_row
, 1, 1, "",
10370 "Dump glyph row ROW to stderr.")
10374 CHECK_NUMBER (row
, 0);
10375 dump_glyph_row (XWINDOW (selected_window
)->current_matrix
, XINT (row
), 1);
10380 DEFUN ("dump-tool-bar-row", Fdump_tool_bar_row
, Sdump_tool_bar_row
,
10384 struct glyph_matrix
*m
= (XWINDOW (selected_frame
->tool_bar_window
)
10386 dump_glyph_row (m
, 0, 1);
10391 DEFUN ("trace-redisplay-toggle", Ftrace_redisplay_toggle
,
10392 Strace_redisplay_toggle
, 0, 0, "",
10393 "Toggle tracing of redisplay.")
10396 trace_redisplay_p
= !trace_redisplay_p
;
10401 #endif /* GLYPH_DEBUG */
10405 /***********************************************************************
10406 Building Desired Matrix Rows
10407 ***********************************************************************/
10409 /* Return a temporary glyph row holding the glyphs of an overlay
10410 arrow. Only used for non-window-redisplay windows. */
10412 static struct glyph_row
*
10413 get_overlay_arrow_glyph_row (w
)
10416 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
10417 struct buffer
*buffer
= XBUFFER (w
->buffer
);
10418 struct buffer
*old
= current_buffer
;
10419 unsigned char *arrow_string
= XSTRING (Voverlay_arrow_string
)->data
;
10420 int arrow_len
= XSTRING (Voverlay_arrow_string
)->size
;
10421 unsigned char *arrow_end
= arrow_string
+ arrow_len
;
10425 int n_glyphs_before
;
10427 set_buffer_temp (buffer
);
10428 init_iterator (&it
, w
, -1, -1, &scratch_glyph_row
, DEFAULT_FACE_ID
);
10429 it
.glyph_row
->used
[TEXT_AREA
] = 0;
10430 SET_TEXT_POS (it
.position
, 0, 0);
10432 multibyte_p
= !NILP (buffer
->enable_multibyte_characters
);
10434 while (p
< arrow_end
)
10436 Lisp_Object face
, ilisp
;
10438 /* Get the next character. */
10440 it
.c
= string_char_and_length (p
, arrow_len
, &it
.len
);
10442 it
.c
= *p
, it
.len
= 1;
10445 /* Get its face. */
10446 XSETFASTINT (ilisp
, p
- arrow_string
);
10447 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
10448 it
.face_id
= compute_char_face (f
, it
.c
, face
);
10450 /* Compute its width, get its glyphs. */
10451 n_glyphs_before
= it
.glyph_row
->used
[TEXT_AREA
];
10452 SET_TEXT_POS (it
.position
, -1, -1);
10453 PRODUCE_GLYPHS (&it
);
10455 /* If this character doesn't fit any more in the line, we have
10456 to remove some glyphs. */
10457 if (it
.current_x
> it
.last_visible_x
)
10459 it
.glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
;
10464 set_buffer_temp (old
);
10465 return it
.glyph_row
;
10469 /* Insert truncation glyphs at the start of IT->glyph_row. Truncation
10470 glyphs are only inserted for terminal frames since we can't really
10471 win with truncation glyphs when partially visible glyphs are
10472 involved. Which glyphs to insert is determined by
10473 produce_special_glyphs. */
10476 insert_left_trunc_glyphs (it
)
10479 struct it truncate_it
;
10480 struct glyph
*from
, *end
, *to
, *toend
;
10482 xassert (!FRAME_WINDOW_P (it
->f
));
10484 /* Get the truncation glyphs. */
10486 truncate_it
.charset
= -1;
10487 truncate_it
.current_x
= 0;
10488 truncate_it
.face_id
= DEFAULT_FACE_ID
;
10489 truncate_it
.glyph_row
= &scratch_glyph_row
;
10490 truncate_it
.glyph_row
->used
[TEXT_AREA
] = 0;
10491 CHARPOS (truncate_it
.position
) = BYTEPOS (truncate_it
.position
) = -1;
10492 truncate_it
.object
= 0;
10493 produce_special_glyphs (&truncate_it
, IT_TRUNCATION
);
10495 /* Overwrite glyphs from IT with truncation glyphs. */
10496 from
= truncate_it
.glyph_row
->glyphs
[TEXT_AREA
];
10497 end
= from
+ truncate_it
.glyph_row
->used
[TEXT_AREA
];
10498 to
= it
->glyph_row
->glyphs
[TEXT_AREA
];
10499 toend
= to
+ it
->glyph_row
->used
[TEXT_AREA
];
10504 /* There may be padding glyphs left over. Remove them. */
10506 while (from
< toend
&& CHAR_GLYPH_PADDING_P (*from
))
10508 while (from
< toend
)
10511 it
->glyph_row
->used
[TEXT_AREA
] = to
- it
->glyph_row
->glyphs
[TEXT_AREA
];
10515 /* Compute the pixel height and width of IT->glyph_row.
10517 Most of the time, ascent and height of a display line will be equal
10518 to the max_ascent and max_height values of the display iterator
10519 structure. This is not the case if
10521 1. We hit ZV without displaying anything. In this case, max_ascent
10522 and max_height will be zero.
10524 2. We have some glyphs that don't contribute to the line height.
10525 (The glyph row flag contributes_to_line_height_p is for future
10526 pixmap extensions).
10528 The first case is easily covered by using default values because in
10529 these cases, the line height does not really matter, except that it
10530 must not be zero. */
10533 compute_line_metrics (it
)
10536 struct glyph_row
*row
= it
->glyph_row
;
10539 if (FRAME_WINDOW_P (it
->f
))
10541 int i
, header_line_height
;
10543 /* The line may consist of one space only, that was added to
10544 place the cursor on it. If so, the row's height hasn't been
10546 if (row
->height
== 0)
10548 if (it
->max_ascent
+ it
->max_descent
== 0)
10549 it
->max_descent
= it
->max_phys_descent
= CANON_Y_UNIT (it
->f
);
10550 row
->ascent
= it
->max_ascent
;
10551 row
->height
= it
->max_ascent
+ it
->max_descent
;
10552 row
->phys_ascent
= it
->max_phys_ascent
;
10553 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
10556 /* Compute the width of this line. */
10557 row
->pixel_width
= row
->x
;
10558 for (i
= 0; i
< row
->used
[TEXT_AREA
]; ++i
)
10559 row
->pixel_width
+= row
->glyphs
[TEXT_AREA
][i
].pixel_width
;
10561 xassert (row
->pixel_width
>= 0);
10562 xassert (row
->ascent
>= 0 && row
->height
> 0);
10564 row
->overlapping_p
= (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
10565 || MATRIX_ROW_OVERLAPS_PRED_P (row
));
10567 /* If first line's physical ascent is larger than its logical
10568 ascent, use the physical ascent, and make the row taller.
10569 This makes accented characters fully visible. */
10570 if (row
== it
->w
->desired_matrix
->rows
10571 && row
->phys_ascent
> row
->ascent
)
10573 row
->height
+= row
->phys_ascent
- row
->ascent
;
10574 row
->ascent
= row
->phys_ascent
;
10577 /* Compute how much of the line is visible. */
10578 row
->visible_height
= row
->height
;
10580 header_line_height
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (it
->w
);
10581 if (row
->y
< header_line_height
)
10582 row
->visible_height
-= header_line_height
- row
->y
;
10585 int max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (it
->w
);
10586 if (row
->y
+ row
->height
> max_y
)
10587 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
10592 row
->pixel_width
= row
->used
[TEXT_AREA
];
10593 row
->ascent
= row
->phys_ascent
= 0;
10594 row
->height
= row
->phys_height
= row
->visible_height
= 1;
10597 /* Compute a hash code for this row. */
10599 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
10600 for (i
= 0; i
< row
->used
[area
]; ++i
)
10601 row
->hash
= ((((row
->hash
<< 4) + (row
->hash
>> 24)) & 0x0fffffff)
10602 + row
->glyphs
[area
][i
].u
.val
10603 + (row
->glyphs
[area
][i
].type
<< 2));
10605 it
->max_ascent
= it
->max_descent
= 0;
10606 it
->max_phys_ascent
= it
->max_phys_descent
= 0;
10610 /* Append one space to the glyph row of iterator IT if doing a
10611 window-based redisplay. DEFAULT_FACE_P non-zero means let the
10612 space have the default face, otherwise let it have the same face as
10615 This function is called to make sure that there is always one glyph
10616 at the end of a glyph row that the cursor can be set on under
10617 window-systems. (If there weren't such a glyph we would not know
10618 how wide and tall a box cursor should be displayed).
10620 At the same time this space let's a nicely handle clearing to the
10621 end of the line if the row ends in italic text. */
10624 append_space (it
, default_face_p
)
10626 int default_face_p
;
10628 if (FRAME_WINDOW_P (it
->f
))
10630 int n
= it
->glyph_row
->used
[TEXT_AREA
];
10632 if (it
->glyph_row
->glyphs
[TEXT_AREA
] + n
10633 < it
->glyph_row
->glyphs
[1 + TEXT_AREA
])
10635 /* Save some values that must not be changed. */
10636 int saved_x
= it
->current_x
;
10637 struct text_pos saved_pos
;
10638 int saved_what
= it
->what
;
10639 int saved_face_id
= it
->face_id
;
10640 int saved_charset
= it
->charset
;
10641 Lisp_Object saved_object
;
10643 saved_object
= it
->object
;
10644 saved_pos
= it
->position
;
10646 it
->what
= IT_CHARACTER
;
10647 bzero (&it
->position
, sizeof it
->position
);
10651 it
->charset
= CHARSET_ASCII
;
10653 if (default_face_p
)
10654 it
->face_id
= DEFAULT_FACE_ID
;
10655 if (it
->multibyte_p
)
10656 it
->face_id
= FACE_FOR_CHARSET (it
->f
, it
->face_id
, CHARSET_ASCII
);
10658 it
->face_id
= FACE_FOR_CHARSET (it
->f
, it
->face_id
, -1);
10660 PRODUCE_GLYPHS (it
);
10662 it
->current_x
= saved_x
;
10663 it
->object
= saved_object
;
10664 it
->position
= saved_pos
;
10665 it
->what
= saved_what
;
10666 it
->face_id
= saved_face_id
;
10667 it
->charset
= saved_charset
;
10673 /* Extend the face of the last glyph in the text area of IT->glyph_row
10674 to the end of the display line. Called from display_line.
10675 If the glyph row is empty, add a space glyph to it so that we
10676 know the face to draw. Set the glyph row flag fill_line_p. */
10679 extend_face_to_end_of_line (it
)
10683 struct frame
*f
= it
->f
;
10685 /* If line is already filled, do nothing. */
10686 if (it
->current_x
>= it
->last_visible_x
)
10689 /* Face extension extends the background and box of IT->face_id
10690 to the end of the line. If the background equals the background
10691 of the frame, we haven't to do anything. */
10692 face
= FACE_FROM_ID (f
, it
->face_id
);
10693 if (FRAME_WINDOW_P (f
)
10694 && face
->box
== FACE_NO_BOX
10695 && face
->background
== FRAME_BACKGROUND_PIXEL (f
)
10699 /* Set the glyph row flag indicating that the face of the last glyph
10700 in the text area has to be drawn to the end of the text area. */
10701 it
->glyph_row
->fill_line_p
= 1;
10703 /* If current charset of IT is not ASCII, make sure we have the
10704 ASCII face. This will be automatically undone the next time
10705 get_next_display_element returns a character from a different
10706 charset. Note that the charset will always be ASCII in unibyte
10708 if (it
->charset
!= CHARSET_ASCII
)
10710 it
->charset
= CHARSET_ASCII
;
10711 it
->face_id
= FACE_FOR_CHARSET (f
, it
->face_id
, CHARSET_ASCII
);
10714 if (FRAME_WINDOW_P (f
))
10716 /* If the row is empty, add a space with the current face of IT,
10717 so that we know which face to draw. */
10718 if (it
->glyph_row
->used
[TEXT_AREA
] == 0)
10720 it
->glyph_row
->glyphs
[TEXT_AREA
][0] = space_glyph
;
10721 it
->glyph_row
->glyphs
[TEXT_AREA
][0].u
.ch
.face_id
= it
->face_id
;
10722 it
->glyph_row
->used
[TEXT_AREA
] = 1;
10727 /* Save some values that must not be changed. */
10728 int saved_x
= it
->current_x
;
10729 struct text_pos saved_pos
;
10730 Lisp_Object saved_object
;
10731 int saved_what
= it
->what
;
10733 saved_object
= it
->object
;
10734 saved_pos
= it
->position
;
10736 it
->what
= IT_CHARACTER
;
10737 bzero (&it
->position
, sizeof it
->position
);
10742 PRODUCE_GLYPHS (it
);
10744 while (it
->current_x
<= it
->last_visible_x
)
10745 PRODUCE_GLYPHS (it
);
10747 /* Don't count these blanks really. It would let us insert a left
10748 truncation glyph below and make us set the cursor on them, maybe. */
10749 it
->current_x
= saved_x
;
10750 it
->object
= saved_object
;
10751 it
->position
= saved_pos
;
10752 it
->what
= saved_what
;
10757 /* Value is non-zero if text starting at CHARPOS in current_buffer is
10758 trailing whitespace. */
10761 trailing_whitespace_p (charpos
)
10764 int bytepos
= CHAR_TO_BYTE (charpos
);
10767 while (bytepos
< ZV_BYTE
10768 && (c
= FETCH_CHAR (bytepos
),
10769 c
== ' ' || c
== '\t'))
10772 if (bytepos
>= ZV_BYTE
|| c
== '\n' || c
== '\r')
10774 if (bytepos
!= PT_BYTE
)
10781 /* Highlight trailing whitespace, if any, in ROW. */
10784 highlight_trailing_whitespace (f
, row
)
10786 struct glyph_row
*row
;
10788 int used
= row
->used
[TEXT_AREA
];
10792 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
10793 struct glyph
*glyph
= start
+ used
- 1;
10795 /* Skip over the space glyph inserted to display the
10796 cursor at the end of a line. */
10797 if (glyph
->type
== CHAR_GLYPH
10798 && glyph
->u
.ch
.code
== ' '
10799 && glyph
->object
== 0)
10802 /* If last glyph is a space or stretch, and it's trailing
10803 whitespace, set the face of all trailing whitespace glyphs in
10804 IT->glyph_row to `trailing-whitespace'. */
10806 && BUFFERP (glyph
->object
)
10807 && (glyph
->type
== STRETCH_GLYPH
10808 || (glyph
->type
== CHAR_GLYPH
10809 && glyph
->u
.ch
.code
== ' '))
10810 && trailing_whitespace_p (glyph
->charpos
))
10812 int face_id
= lookup_named_face (f
, Qtrailing_whitespace
,
10815 while (glyph
>= start
10816 && BUFFERP (glyph
->object
)
10817 && (glyph
->type
== STRETCH_GLYPH
10818 || (glyph
->type
== CHAR_GLYPH
10819 && glyph
->u
.ch
.code
== ' ')))
10821 if (glyph
->type
== STRETCH_GLYPH
)
10822 glyph
->u
.stretch
.face_id
= face_id
;
10824 glyph
->u
.ch
.face_id
= face_id
;
10832 /* Construct the glyph row IT->glyph_row in the desired matrix of
10833 IT->w from text at the current position of IT. See dispextern.h
10834 for an overview of struct it. Value is non-zero if
10835 IT->glyph_row displays text, as opposed to a line displaying ZV
10842 struct glyph_row
*row
= it
->glyph_row
;
10844 /* We always start displaying at hpos zero even if hscrolled. */
10845 xassert (it
->hpos
== 0 && it
->current_x
== 0);
10847 /* We must not display in a row that's not a text row. */
10848 xassert (MATRIX_ROW_VPOS (row
, it
->w
->desired_matrix
)
10849 < it
->w
->desired_matrix
->nrows
);
10851 /* Is IT->w showing the region? */
10852 it
->w
->region_showing
= it
->region_beg_charpos
> 0 ? Qt
: Qnil
;
10854 /* Clear the result glyph row and enable it. */
10855 prepare_desired_row (row
);
10857 row
->y
= it
->current_y
;
10858 row
->start
= it
->current
;
10859 row
->continuation_lines_width
= it
->continuation_lines_width
;
10860 row
->displays_text_p
= 1;
10862 /* Arrange the overlays nicely for our purposes. Usually, we call
10863 display_line on only one line at a time, in which case this
10864 can't really hurt too much, or we call it on lines which appear
10865 one after another in the buffer, in which case all calls to
10866 recenter_overlay_lists but the first will be pretty cheap. */
10867 recenter_overlay_lists (current_buffer
, IT_CHARPOS (*it
));
10869 /* Move over display elements that are not visible because we are
10870 hscrolled. This may stop at an x-position < IT->first_visible_x
10871 if the first glyph is partially visible or if we hit a line end. */
10872 if (it
->current_x
< it
->first_visible_x
)
10873 move_it_in_display_line_to (it
, ZV
, it
->first_visible_x
,
10874 MOVE_TO_POS
| MOVE_TO_X
);
10876 /* Get the initial row height. This is either the height of the
10877 text hscrolled, if there is any, or zero. */
10878 row
->ascent
= it
->max_ascent
;
10879 row
->height
= it
->max_ascent
+ it
->max_descent
;
10880 row
->phys_ascent
= it
->max_phys_ascent
;
10881 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
10883 /* Loop generating characters. The loop is left with IT on the next
10884 character to display. */
10887 int n_glyphs_before
, hpos_before
, x_before
;
10890 /* Retrieve the next thing to display. Value is zero if end of
10892 if (!get_next_display_element (it
))
10894 /* Maybe add a space at the end of this line that is used to
10895 display the cursor there under X. */
10896 append_space (it
, 1);
10898 /* The position -1 below indicates a blank line not
10899 corresponding to any text, as opposed to an empty line
10900 corresponding to a line end. */
10901 if (row
->used
[TEXT_AREA
] <= 1)
10903 row
->glyphs
[TEXT_AREA
]->charpos
= -1;
10904 row
->displays_text_p
= 0;
10906 if (!NILP (XBUFFER (it
->w
->buffer
)->indicate_empty_lines
))
10907 row
->indicate_empty_line_p
= 1;
10910 it
->continuation_lines_width
= 0;
10911 row
->ends_at_zv_p
= 1;
10915 /* Now, get the metrics of what we want to display. This also
10916 generates glyphs in `row' (which is IT->glyph_row). */
10917 n_glyphs_before
= row
->used
[TEXT_AREA
];
10919 PRODUCE_GLYPHS (it
);
10921 /* If this display element was in marginal areas, continue with
10923 if (it
->area
!= TEXT_AREA
)
10925 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
10926 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
10927 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
10928 row
->phys_height
= max (row
->phys_height
,
10929 it
->max_phys_ascent
+ it
->max_phys_descent
);
10930 set_iterator_to_next (it
);
10934 /* Does the display element fit on the line? If we truncate
10935 lines, we should draw past the right edge of the window. If
10936 we don't truncate, we want to stop so that we can display the
10937 continuation glyph before the right margin. If lines are
10938 continued, there are two possible strategies for characters
10939 resulting in more than 1 glyph (e.g. tabs): Display as many
10940 glyphs as possible in this line and leave the rest for the
10941 continuation line, or display the whole element in the next
10942 line. Original redisplay did the former, so we do it also. */
10943 nglyphs
= row
->used
[TEXT_AREA
] - n_glyphs_before
;
10944 hpos_before
= it
->hpos
;
10948 && it
->current_x
< it
->last_visible_x
)
10951 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
10952 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
10953 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
10954 row
->phys_height
= max (row
->phys_height
,
10955 it
->max_phys_ascent
+ it
->max_phys_descent
);
10956 if (it
->current_x
- it
->pixel_width
< it
->first_visible_x
)
10957 row
->x
= x
- it
->first_visible_x
;
10962 struct glyph
*glyph
;
10964 for (i
= 0; i
< nglyphs
; ++i
, x
= new_x
)
10966 glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
10967 new_x
= x
+ glyph
->pixel_width
;
10969 if (/* Lines are continued. */
10970 !it
->truncate_lines_p
10971 && (/* Glyph doesn't fit on the line. */
10972 new_x
> it
->last_visible_x
10973 /* Or it fits exactly on a window system frame. */
10974 || (new_x
== it
->last_visible_x
10975 && FRAME_WINDOW_P (it
->f
))))
10977 /* End of a continued line. */
10980 || (new_x
== it
->last_visible_x
10981 && FRAME_WINDOW_P (it
->f
)))
10983 /* Current glyph fits exactly on the line. We
10984 must continue the line because we can't draw
10985 the cursor after the glyph. */
10986 row
->continued_p
= 1;
10987 it
->current_x
= new_x
;
10988 it
->continuation_lines_width
+= new_x
;
10990 if (i
== nglyphs
- 1)
10991 set_iterator_to_next (it
);
10995 /* Display element draws past the right edge of
10996 the window. Restore positions to values
10997 before the element. The next line starts
10998 with current_x before the glyph that could
10999 not be displayed, so that TAB works right. */
11000 row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
11002 /* Display continuation glyphs. */
11003 if (!FRAME_WINDOW_P (it
->f
))
11004 produce_special_glyphs (it
, IT_CONTINUATION
);
11005 row
->continued_p
= 1;
11008 it
->continuation_lines_width
+= x
;
11012 else if (new_x
> it
->first_visible_x
)
11014 /* Increment number of glyphs actually displayed. */
11017 if (x
< it
->first_visible_x
)
11018 /* Glyph is partially visible, i.e. row starts at
11019 negative X position. */
11020 row
->x
= x
- it
->first_visible_x
;
11024 /* Glyph is completely off the left margin of the
11025 window. This should not happen because of the
11026 move_it_in_display_line at the start of
11032 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
11033 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
11034 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
11035 row
->phys_height
= max (row
->phys_height
,
11036 it
->max_phys_ascent
+ it
->max_phys_descent
);
11038 /* End of this display line if row is continued. */
11039 if (row
->continued_p
)
11043 /* Is this a line end? If yes, we're also done, after making
11044 sure that a non-default face is extended up to the right
11045 margin of the window. */
11046 if (ITERATOR_AT_END_OF_LINE_P (it
))
11048 int used_before
= row
->used
[TEXT_AREA
];
11050 /* Add a space at the end of the line that is used to
11051 display the cursor there. */
11052 append_space (it
, 0);
11054 /* Extend the face to the end of the line. */
11055 extend_face_to_end_of_line (it
);
11057 /* Make sure we have the position. */
11058 if (used_before
== 0)
11059 row
->glyphs
[TEXT_AREA
]->charpos
= CHARPOS (it
->position
);
11061 /* Consume the line end. This skips over invisible lines. */
11062 set_iterator_to_next (it
);
11063 it
->continuation_lines_width
= 0;
11067 /* Proceed with next display element. Note that this skips
11068 over lines invisible because of selective display. */
11069 set_iterator_to_next (it
);
11071 /* If we truncate lines, we are done when the last displayed
11072 glyphs reach past the right margin of the window. */
11073 if (it
->truncate_lines_p
11074 && (FRAME_WINDOW_P (it
->f
)
11075 ? (it
->current_x
>= it
->last_visible_x
)
11076 : (it
->current_x
> it
->last_visible_x
)))
11078 /* Maybe add truncation glyphs. */
11079 if (!FRAME_WINDOW_P (it
->f
))
11081 --it
->glyph_row
->used
[TEXT_AREA
];
11082 produce_special_glyphs (it
, IT_TRUNCATION
);
11085 row
->truncated_on_right_p
= 1;
11086 it
->continuation_lines_width
= 0;
11087 reseat_at_next_visible_line_start (it
, 0);
11088 row
->ends_at_zv_p
= FETCH_BYTE (IT_BYTEPOS (*it
) - 1) != '\n';
11089 it
->hpos
= hpos_before
;
11090 it
->current_x
= x_before
;
11095 /* If line is not empty and hscrolled, maybe insert truncation glyphs
11096 at the left window margin. */
11097 if (it
->first_visible_x
11098 && IT_CHARPOS (*it
) != MATRIX_ROW_START_CHARPOS (row
))
11100 if (!FRAME_WINDOW_P (it
->f
))
11101 insert_left_trunc_glyphs (it
);
11102 row
->truncated_on_left_p
= 1;
11105 /* If the start of this line is the overlay arrow-position, then
11106 mark this glyph row as the one containing the overlay arrow.
11107 This is clearly a mess with variable size fonts. It would be
11108 better to let it be displayed like cursors under X. */
11109 if (MARKERP (Voverlay_arrow_position
)
11110 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
11111 && (MATRIX_ROW_START_CHARPOS (row
)
11112 == marker_position (Voverlay_arrow_position
))
11113 && STRINGP (Voverlay_arrow_string
)
11114 && ! overlay_arrow_seen
)
11116 /* Overlay arrow in window redisplay is a bitmap. */
11117 if (!FRAME_WINDOW_P (it
->f
))
11119 struct glyph_row
*arrow_row
= get_overlay_arrow_glyph_row (it
->w
);
11120 struct glyph
*glyph
= arrow_row
->glyphs
[TEXT_AREA
];
11121 struct glyph
*arrow_end
= glyph
+ arrow_row
->used
[TEXT_AREA
];
11122 struct glyph
*p
= row
->glyphs
[TEXT_AREA
];
11123 struct glyph
*p2
, *end
;
11125 /* Copy the arrow glyphs. */
11126 while (glyph
< arrow_end
)
11129 /* Throw away padding glyphs. */
11131 end
= row
->glyphs
[TEXT_AREA
] + row
->used
[TEXT_AREA
];
11132 while (p2
< end
&& CHAR_GLYPH_PADDING_P (*p2
))
11138 row
->used
[TEXT_AREA
] = p2
- row
->glyphs
[TEXT_AREA
];
11142 overlay_arrow_seen
= 1;
11143 row
->overlay_arrow_p
= 1;
11146 /* Compute pixel dimensions of this line. */
11147 compute_line_metrics (it
);
11149 /* Remember the position at which this line ends. */
11150 row
->end
= it
->current
;
11152 /* Maybe set the cursor. If you change this, it's probably a good
11153 idea to also change the code in redisplay_window for cursor
11154 movement in an unchanged window. */
11155 if (it
->w
->cursor
.vpos
< 0
11156 && PT
>= MATRIX_ROW_START_CHARPOS (row
)
11157 && MATRIX_ROW_END_CHARPOS (row
) >= PT
11158 && !(MATRIX_ROW_END_CHARPOS (row
) == PT
11159 && (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row
)
11160 || !row
->ends_at_zv_p
)))
11161 set_cursor_from_row (it
->w
, row
, it
->w
->desired_matrix
, 0, 0, 0, 0);
11163 /* Highlight trailing whitespace. */
11164 if (!NILP (Vshow_trailing_whitespace
))
11165 highlight_trailing_whitespace (it
->f
, it
->glyph_row
);
11167 /* Prepare for the next line. This line starts horizontally at (X
11168 HPOS) = (0 0). Vertical positions are incremented. As a
11169 convenience for the caller, IT->glyph_row is set to the next
11171 it
->current_x
= it
->hpos
= 0;
11172 it
->current_y
+= row
->height
;
11175 return row
->displays_text_p
;
11180 /***********************************************************************
11182 ***********************************************************************/
11184 /* Redisplay the menu bar in the frame for window W.
11186 The menu bar of X frames that don't have X toolkit support is
11187 displayed in a special window W->frame->menu_bar_window.
11189 The menu bar of terminal frames is treated specially as far as
11190 glyph matrices are concerned. Menu bar lines are not part of
11191 windows, so the update is done directly on the frame matrix rows
11192 for the menu bar. */
11195 display_menu_bar (w
)
11198 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
11203 /* Don't do all this for graphical frames. */
11205 if (!NILP (Vwindow_system
))
11208 #ifdef USE_X_TOOLKIT
11213 #ifdef USE_X_TOOLKIT
11214 xassert (!FRAME_WINDOW_P (f
));
11215 init_iterator (&it
, w
, -1, -1, f
->desired_matrix
->rows
, MODE_LINE_FACE_ID
);
11216 it
.first_visible_x
= 0;
11217 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
11218 #else /* not USE_X_TOOLKIT */
11219 if (FRAME_WINDOW_P (f
))
11221 /* Menu bar lines are displayed in the desired matrix of the
11222 dummy window menu_bar_window. */
11223 struct window
*menu_w
;
11224 xassert (WINDOWP (f
->menu_bar_window
));
11225 menu_w
= XWINDOW (f
->menu_bar_window
);
11226 init_iterator (&it
, menu_w
, -1, -1, menu_w
->desired_matrix
->rows
,
11227 MODE_LINE_FACE_ID
);
11228 it
.first_visible_x
= 0;
11229 it
.last_visible_x
= FRAME_WINDOW_WIDTH (f
) * CANON_X_UNIT (f
);
11233 /* This is a TTY frame, i.e. character hpos/vpos are used as
11235 init_iterator (&it
, w
, -1, -1, f
->desired_matrix
->rows
,
11236 MODE_LINE_FACE_ID
);
11237 it
.first_visible_x
= 0;
11238 it
.last_visible_x
= FRAME_WIDTH (f
);
11240 #endif /* not USE_X_TOOLKIT */
11242 /* Clear all rows of the menu bar. */
11243 for (i
= 0; i
< FRAME_MENU_BAR_LINES (f
); ++i
)
11245 struct glyph_row
*row
= it
.glyph_row
+ i
;
11246 clear_glyph_row (row
);
11247 row
->enabled_p
= 1;
11248 row
->full_width_p
= 1;
11251 /* Make the first line of the menu bar appear in reverse video. */
11252 it
.glyph_row
->inverse_p
= mode_line_inverse_video
!= 0;
11254 /* Display all items of the menu bar. */
11255 items
= FRAME_MENU_BAR_ITEMS (it
.f
);
11256 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
11258 Lisp_Object string
;
11260 /* Stop at nil string. */
11261 string
= XVECTOR (items
)->contents
[i
+ 1];
11265 /* Remember where item was displayed. */
11266 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], it
.hpos
);
11268 /* Display the item, pad with one space. */
11269 if (it
.current_x
< it
.last_visible_x
)
11270 display_string (NULL
, string
, Qnil
, 0, 0, &it
,
11271 XSTRING (string
)->size
+ 1, 0, 0, -1);
11274 /* Fill out the line with spaces. */
11275 if (it
.current_x
< it
.last_visible_x
)
11276 display_string ("", Qnil
, Qnil
, 0, 0, &it
, -1, 0, 0, -1);
11278 /* Compute the total height of the lines. */
11279 compute_line_metrics (&it
);
11284 /***********************************************************************
11286 ***********************************************************************/
11288 /* Display the mode and/or top line of window W. */
11291 display_mode_lines (w
)
11294 /* These will be set while the mode line specs are processed. */
11295 line_number_displayed
= 0;
11296 w
->column_number_displayed
= Qnil
;
11298 if (WINDOW_WANTS_MODELINE_P (w
))
11299 display_mode_line (w
, MODE_LINE_FACE_ID
,
11300 current_buffer
->mode_line_format
);
11302 if (WINDOW_WANTS_HEADER_LINE_P (w
))
11303 display_mode_line (w
, HEADER_LINE_FACE_ID
,
11304 current_buffer
->header_line_format
);
11308 /* Display mode or top line of window W. FACE_ID specifies which line
11309 to display; it is either MODE_LINE_FACE_ID or HEADER_LINE_FACE_ID.
11310 FORMAT is the mode line format to display. */
11313 display_mode_line (w
, face_id
, format
)
11315 enum face_id face_id
;
11316 Lisp_Object format
;
11321 init_iterator (&it
, w
, -1, -1, NULL
, face_id
);
11322 prepare_desired_row (it
.glyph_row
);
11324 /* Temporarily make frame's keyboard the current kboard so that
11325 kboard-local variables in the mode_line_format will get the right
11327 push_frame_kboard (it
.f
);
11328 display_mode_element (&it
, 0, 0, 0, format
);
11329 pop_frame_kboard ();
11331 /* Fill up with spaces. */
11332 display_string (" ", Qnil
, Qnil
, 0, 0, &it
, 10000, -1, -1, 0);
11334 compute_line_metrics (&it
);
11335 it
.glyph_row
->full_width_p
= 1;
11336 it
.glyph_row
->mode_line_p
= 1;
11337 it
.glyph_row
->inverse_p
= mode_line_inverse_video
!= 0;
11338 it
.glyph_row
->continued_p
= 0;
11339 it
.glyph_row
->truncated_on_left_p
= 0;
11340 it
.glyph_row
->truncated_on_right_p
= 0;
11342 /* Make a 3D mode-line have a shadow at its right end. */
11343 face
= FACE_FROM_ID (it
.f
, face_id
);
11344 extend_face_to_end_of_line (&it
);
11345 if (face
->box
!= FACE_NO_BOX
)
11347 struct glyph
*last
= (it
.glyph_row
->glyphs
[TEXT_AREA
]
11348 + it
.glyph_row
->used
[TEXT_AREA
] - 1);
11349 last
->right_box_line_p
= 1;
11354 /* Contribute ELT to the mode line for window IT->w. How it
11355 translates into text depends on its data type.
11357 IT describes the display environment in which we display, as usual.
11359 DEPTH is the depth in recursion. It is used to prevent
11360 infinite recursion here.
11362 FIELD_WIDTH is the number of characters the display of ELT should
11363 occupy in the mode line, and PRECISION is the maximum number of
11364 characters to display from ELT's representation. See
11365 display_string for details. *
11367 Returns the hpos of the end of the text generated by ELT. */
11370 display_mode_element (it
, depth
, field_width
, precision
, elt
)
11373 int field_width
, precision
;
11376 int n
= 0, field
, prec
;
11384 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
11388 /* A string: output it and check for %-constructs within it. */
11390 unsigned char *this = XSTRING (elt
)->data
;
11391 unsigned char *lisp_string
= this;
11393 while ((precision
<= 0 || n
< precision
)
11395 && (frame_title_ptr
11396 || it
->current_x
< it
->last_visible_x
))
11398 unsigned char *last
= this;
11400 /* Advance to end of string or next format specifier. */
11401 while ((c
= *this++) != '\0' && c
!= '%')
11404 if (this - 1 != last
)
11406 /* Output to end of string or up to '%'. Field width
11407 is length of string. Don't output more than
11408 PRECISION allows us. */
11409 prec
= --this - last
;
11410 if (precision
> 0 && prec
> precision
- n
)
11411 prec
= precision
- n
;
11413 if (frame_title_ptr
)
11414 n
+= store_frame_title (last
, prec
, prec
);
11416 n
+= display_string (NULL
, elt
, Qnil
, 0, last
- lisp_string
,
11417 it
, 0, prec
, 0, -1);
11419 else /* c == '%' */
11421 unsigned char *percent_position
= this;
11423 /* Get the specified minimum width. Zero means
11426 while ((c
= *this++) >= '0' && c
<= '9')
11427 field
= field
* 10 + c
- '0';
11429 /* Don't pad beyond the total padding allowed. */
11430 if (field_width
- n
> 0 && field
> field_width
- n
)
11431 field
= field_width
- n
;
11433 /* Note that either PRECISION <= 0 or N < PRECISION. */
11434 prec
= precision
- n
;
11437 n
+= display_mode_element (it
, depth
, field
, prec
,
11438 Vglobal_mode_string
);
11441 unsigned char *spec
11442 = decode_mode_spec (it
->w
, c
, field
, prec
);
11444 if (frame_title_ptr
)
11445 n
+= store_frame_title (spec
, field
, prec
);
11449 = it
->glyph_row
->used
[TEXT_AREA
];
11451 = percent_position
- XSTRING (elt
)->data
;
11453 = display_string (spec
, Qnil
, elt
, charpos
, 0, it
,
11454 field
, prec
, 0, -1);
11456 /* Assign to the glyphs written above the
11457 string where the `%x' came from, position
11461 struct glyph
*glyph
11462 = (it
->glyph_row
->glyphs
[TEXT_AREA
]
11466 for (i
= 0; i
< nwritten
; ++i
)
11468 glyph
[i
].object
= elt
;
11469 glyph
[i
].charpos
= charpos
;
11482 /* A symbol: process the value of the symbol recursively
11483 as if it appeared here directly. Avoid error if symbol void.
11484 Special case: if value of symbol is a string, output the string
11487 register Lisp_Object tem
;
11488 tem
= Fboundp (elt
);
11491 tem
= Fsymbol_value (elt
);
11492 /* If value is a string, output that string literally:
11493 don't check for % within it. */
11496 prec
= XSTRING (tem
)->size
;
11497 if (precision
> 0 && prec
> precision
- n
)
11498 prec
= precision
- n
;
11499 if (frame_title_ptr
)
11500 n
+= store_frame_title (XSTRING (tem
)->data
, -1, prec
);
11502 n
+= display_string (NULL
, tem
, Qnil
, 0, 0, it
,
11505 else if (!EQ (tem
, elt
))
11507 /* Give up right away for nil or t. */
11517 register Lisp_Object car
, tem
;
11519 /* A cons cell: three distinct cases.
11520 If first element is a string or a cons, process all the elements
11521 and effectively concatenate them.
11522 If first element is a negative number, truncate displaying cdr to
11523 at most that many characters. If positive, pad (with spaces)
11524 to at least that many characters.
11525 If first element is a symbol, process the cadr or caddr recursively
11526 according to whether the symbol's value is non-nil or nil. */
11528 if (EQ (car
, QCeval
) && CONSP (XCDR (elt
)))
11530 /* An element of the form (:eval FORM) means evaluate FORM
11531 and use the result as mode line elements. */
11532 struct gcpro gcpro1
;
11535 spec
= eval_form (XCAR (XCDR (elt
)));
11537 n
+= display_mode_element (it
, depth
, field_width
- n
,
11538 precision
- n
, spec
);
11541 else if (SYMBOLP (car
))
11543 tem
= Fboundp (car
);
11547 /* elt is now the cdr, and we know it is a cons cell.
11548 Use its car if CAR has a non-nil value. */
11551 tem
= Fsymbol_value (car
);
11558 /* Symbol's value is nil (or symbol is unbound)
11559 Get the cddr of the original list
11560 and if possible find the caddr and use that. */
11564 else if (!CONSP (elt
))
11569 else if (INTEGERP (car
))
11571 register int lim
= XINT (car
);
11575 /* Negative int means reduce maximum width. */
11576 if (precision
<= 0)
11579 precision
= min (precision
, -lim
);
11583 /* Padding specified. Don't let it be more than
11584 current maximum. */
11586 lim
= min (precision
, lim
);
11588 /* If that's more padding than already wanted, queue it.
11589 But don't reduce padding already specified even if
11590 that is beyond the current truncation point. */
11591 field_width
= max (lim
, field_width
);
11595 else if (STRINGP (car
) || CONSP (car
))
11597 register int limit
= 50;
11598 /* Limit is to protect against circular lists. */
11601 && (precision
<= 0 || n
< precision
))
11603 n
+= display_mode_element (it
, depth
, field_width
- n
,
11604 precision
- n
, XCAR (elt
));
11613 if (frame_title_ptr
)
11614 n
+= store_frame_title ("*invalid*", 0, precision
- n
);
11616 n
+= display_string ("*invalid*", Qnil
, Qnil
, 0, 0, it
, 0,
11617 precision
- n
, 0, 0);
11621 /* Pad to FIELD_WIDTH. */
11622 if (field_width
> 0 && n
< field_width
)
11624 if (frame_title_ptr
)
11625 n
+= store_frame_title ("", field_width
- n
, 0);
11627 n
+= display_string ("", Qnil
, Qnil
, 0, 0, it
, field_width
- n
,
11635 /* Write a null-terminated, right justified decimal representation of
11636 the positive integer D to BUF using a minimal field width WIDTH. */
11639 pint2str (buf
, width
, d
)
11640 register char *buf
;
11641 register int width
;
11644 register char *p
= buf
;
11652 *p
++ = d
% 10 + '0';
11657 for (width
-= (int) (p
- buf
); width
> 0; --width
)
11668 /* Set a mnemonic character for coding_system (Lisp symbol) in BUF.
11669 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
11670 type of CODING_SYSTEM. Return updated pointer into BUF. */
11672 static unsigned char invalid_eol_type
[] = "(*invalid*)";
11675 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
11676 Lisp_Object coding_system
;
11677 register char *buf
;
11681 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
11682 unsigned char *eol_str
;
11684 /* The EOL conversion we are using. */
11685 Lisp_Object eoltype
;
11687 val
= coding_system
;
11689 if (NILP (val
)) /* Not yet decided. */
11694 eoltype
= eol_mnemonic_undecided
;
11695 /* Don't mention EOL conversion if it isn't decided. */
11699 Lisp_Object eolvalue
;
11701 eolvalue
= Fget (coding_system
, Qeol_type
);
11703 while (!NILP (val
) && SYMBOLP (val
))
11705 val
= Fget (val
, Qcoding_system
);
11706 if (NILP (eolvalue
))
11707 eolvalue
= Fget (val
, Qeol_type
);
11711 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
11715 /* The EOL conversion that is normal on this system. */
11717 if (NILP (eolvalue
)) /* Not yet decided. */
11718 eoltype
= eol_mnemonic_undecided
;
11719 else if (VECTORP (eolvalue
)) /* Not yet decided. */
11720 eoltype
= eol_mnemonic_undecided
;
11721 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
11722 eoltype
= (XFASTINT (eolvalue
) == 0
11723 ? eol_mnemonic_unix
11724 : (XFASTINT (eolvalue
) == 1
11725 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
11731 /* Mention the EOL conversion if it is not the usual one. */
11732 if (STRINGP (eoltype
))
11734 eol_str
= XSTRING (eoltype
)->data
;
11735 eol_str_len
= XSTRING (eoltype
)->size
;
11737 else if (INTEGERP (eoltype
)
11738 && CHAR_VALID_P (XINT (eoltype
), 0))
11740 unsigned char work
[4];
11742 eol_str_len
= CHAR_STRING (XINT (eoltype
), work
, eol_str
);
11746 eol_str
= invalid_eol_type
;
11747 eol_str_len
= sizeof (invalid_eol_type
) - 1;
11749 bcopy (eol_str
, buf
, eol_str_len
);
11750 buf
+= eol_str_len
;
11756 /* Return a string for the output of a mode line %-spec for window W,
11757 generated by character C. PRECISION >= 0 means don't return a
11758 string longer than that value. FIELD_WIDTH > 0 means pad the
11759 string returned with spaces to that value. */
11761 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
11764 decode_mode_spec (w
, c
, field_width
, precision
)
11767 int field_width
, precision
;
11770 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
11771 char *decode_mode_spec_buf
= f
->decode_mode_spec_buffer
;
11772 struct buffer
*b
= XBUFFER (w
->buffer
);
11779 if (!NILP (b
->read_only
))
11781 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
11786 /* This differs from %* only for a modified read-only buffer. */
11787 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
11789 if (!NILP (b
->read_only
))
11794 /* This differs from %* in ignoring read-only-ness. */
11795 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
11807 if (command_loop_level
> 5)
11809 p
= decode_mode_spec_buf
;
11810 for (i
= 0; i
< command_loop_level
; i
++)
11813 return decode_mode_spec_buf
;
11821 if (command_loop_level
> 5)
11823 p
= decode_mode_spec_buf
;
11824 for (i
= 0; i
< command_loop_level
; i
++)
11827 return decode_mode_spec_buf
;
11834 /* Let lots_of_dashes be a string of infinite length. */
11835 if (field_width
<= 0
11836 || field_width
> sizeof (lots_of_dashes
))
11838 for (i
= 0; i
< FRAME_MESSAGE_BUF_SIZE (f
) - 1; ++i
)
11839 decode_mode_spec_buf
[i
] = '-';
11840 decode_mode_spec_buf
[i
] = '\0';
11841 return decode_mode_spec_buf
;
11844 return lots_of_dashes
;
11853 int col
= current_column ();
11854 XSETFASTINT (w
->column_number_displayed
, col
);
11855 pint2str (decode_mode_spec_buf
, field_width
, col
);
11856 return decode_mode_spec_buf
;
11860 /* %F displays the frame name. */
11861 if (!NILP (f
->title
))
11862 return (char *) XSTRING (f
->title
)->data
;
11863 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
11864 return (char *) XSTRING (f
->name
)->data
;
11873 int startpos
= XMARKER (w
->start
)->charpos
;
11874 int startpos_byte
= marker_byte_position (w
->start
);
11875 int line
, linepos
, linepos_byte
, topline
;
11877 int height
= XFASTINT (w
->height
);
11879 /* If we decided that this buffer isn't suitable for line numbers,
11880 don't forget that too fast. */
11881 if (EQ (w
->base_line_pos
, w
->buffer
))
11883 /* But do forget it, if the window shows a different buffer now. */
11884 else if (BUFFERP (w
->base_line_pos
))
11885 w
->base_line_pos
= Qnil
;
11887 /* If the buffer is very big, don't waste time. */
11888 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
11890 w
->base_line_pos
= Qnil
;
11891 w
->base_line_number
= Qnil
;
11895 if (!NILP (w
->base_line_number
)
11896 && !NILP (w
->base_line_pos
)
11897 && XFASTINT (w
->base_line_pos
) <= startpos
)
11899 line
= XFASTINT (w
->base_line_number
);
11900 linepos
= XFASTINT (w
->base_line_pos
);
11901 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
11906 linepos
= BUF_BEGV (b
);
11907 linepos_byte
= BUF_BEGV_BYTE (b
);
11910 /* Count lines from base line to window start position. */
11911 nlines
= display_count_lines (linepos
, linepos_byte
,
11915 topline
= nlines
+ line
;
11917 /* Determine a new base line, if the old one is too close
11918 or too far away, or if we did not have one.
11919 "Too close" means it's plausible a scroll-down would
11920 go back past it. */
11921 if (startpos
== BUF_BEGV (b
))
11923 XSETFASTINT (w
->base_line_number
, topline
);
11924 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
11926 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
11927 || linepos
== BUF_BEGV (b
))
11929 int limit
= BUF_BEGV (b
);
11930 int limit_byte
= BUF_BEGV_BYTE (b
);
11932 int distance
= (height
* 2 + 30) * line_number_display_limit_width
;
11934 if (startpos
- distance
> limit
)
11936 limit
= startpos
- distance
;
11937 limit_byte
= CHAR_TO_BYTE (limit
);
11940 nlines
= display_count_lines (startpos
, startpos_byte
,
11942 - (height
* 2 + 30),
11944 /* If we couldn't find the lines we wanted within
11945 line_number_display_limit_width chars per line,
11946 give up on line numbers for this window. */
11947 if (position
== limit_byte
&& limit
== startpos
- distance
)
11949 w
->base_line_pos
= w
->buffer
;
11950 w
->base_line_number
= Qnil
;
11954 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
11955 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
11958 /* Now count lines from the start pos to point. */
11959 nlines
= display_count_lines (startpos
, startpos_byte
,
11960 PT_BYTE
, PT
, &junk
);
11962 /* Record that we did display the line number. */
11963 line_number_displayed
= 1;
11965 /* Make the string to show. */
11966 pint2str (decode_mode_spec_buf
, field_width
, topline
+ nlines
);
11967 return decode_mode_spec_buf
;
11970 char* p
= decode_mode_spec_buf
;
11971 int pad
= field_width
- 2;
11976 return decode_mode_spec_buf
;
11982 obj
= b
->mode_name
;
11986 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
11992 int pos
= marker_position (w
->start
);
11993 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
11995 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
11997 if (pos
<= BUF_BEGV (b
))
12002 else if (pos
<= BUF_BEGV (b
))
12006 if (total
> 1000000)
12007 /* Do it differently for a large value, to avoid overflow. */
12008 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
12010 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
12011 /* We can't normally display a 3-digit number,
12012 so get us a 2-digit number that is close. */
12015 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
12016 return decode_mode_spec_buf
;
12020 /* Display percentage of size above the bottom of the screen. */
12023 int toppos
= marker_position (w
->start
);
12024 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
12025 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
12027 if (botpos
>= BUF_ZV (b
))
12029 if (toppos
<= BUF_BEGV (b
))
12036 if (total
> 1000000)
12037 /* Do it differently for a large value, to avoid overflow. */
12038 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
12040 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
12041 /* We can't normally display a 3-digit number,
12042 so get us a 2-digit number that is close. */
12045 if (toppos
<= BUF_BEGV (b
))
12046 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
12048 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
12049 return decode_mode_spec_buf
;
12054 /* status of process */
12055 obj
= Fget_buffer_process (w
->buffer
);
12057 return "no process";
12058 #ifdef subprocesses
12059 obj
= Fsymbol_name (Fprocess_status (obj
));
12063 case 't': /* indicate TEXT or BINARY */
12064 #ifdef MODE_LINE_BINARY_TEXT
12065 return MODE_LINE_BINARY_TEXT (b
);
12071 /* coding-system (not including end-of-line format) */
12073 /* coding-system (including end-of-line type) */
12075 int eol_flag
= (c
== 'Z');
12076 char *p
= decode_mode_spec_buf
;
12078 if (! FRAME_WINDOW_P (f
))
12080 /* No need to mention EOL here--the terminal never needs
12081 to do EOL conversion. */
12082 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
12083 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
12085 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
12088 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
12089 #ifdef subprocesses
12090 obj
= Fget_buffer_process (Fcurrent_buffer ());
12091 if (PROCESSP (obj
))
12093 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
12095 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
12098 #endif /* subprocesses */
12101 return decode_mode_spec_buf
;
12106 return (char *) XSTRING (obj
)->data
;
12112 /* Count up to COUNT lines starting from START / START_BYTE.
12113 But don't go beyond LIMIT_BYTE.
12114 Return the number of lines thus found (always nonnegative).
12116 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
12119 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
12120 int start
, start_byte
, limit_byte
, count
;
12123 register unsigned char *cursor
;
12124 unsigned char *base
;
12126 register int ceiling
;
12127 register unsigned char *ceiling_addr
;
12128 int orig_count
= count
;
12130 /* If we are not in selective display mode,
12131 check only for newlines. */
12132 int selective_display
= (!NILP (current_buffer
->selective_display
)
12133 && !INTEGERP (current_buffer
->selective_display
));
12137 while (start_byte
< limit_byte
)
12139 ceiling
= BUFFER_CEILING_OF (start_byte
);
12140 ceiling
= min (limit_byte
- 1, ceiling
);
12141 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
12142 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
12145 if (selective_display
)
12146 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
12149 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
12152 if (cursor
!= ceiling_addr
)
12156 start_byte
+= cursor
- base
+ 1;
12157 *byte_pos_ptr
= start_byte
;
12161 if (++cursor
== ceiling_addr
)
12167 start_byte
+= cursor
- base
;
12172 while (start_byte
> limit_byte
)
12174 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
12175 ceiling
= max (limit_byte
, ceiling
);
12176 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
12177 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
12180 if (selective_display
)
12181 while (--cursor
!= ceiling_addr
12182 && *cursor
!= '\n' && *cursor
!= 015)
12185 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
12188 if (cursor
!= ceiling_addr
)
12192 start_byte
+= cursor
- base
+ 1;
12193 *byte_pos_ptr
= start_byte
;
12194 /* When scanning backwards, we should
12195 not count the newline posterior to which we stop. */
12196 return - orig_count
- 1;
12202 /* Here we add 1 to compensate for the last decrement
12203 of CURSOR, which took it past the valid range. */
12204 start_byte
+= cursor
- base
+ 1;
12208 *byte_pos_ptr
= limit_byte
;
12211 return - orig_count
+ count
;
12212 return orig_count
- count
;
12218 /***********************************************************************
12220 ***********************************************************************/
12222 /* Display a NUL-terminated string, starting with index START.
12224 If STRING is non-null, display that C string. Otherwise, the Lisp
12225 string LISP_STRING is displayed.
12227 If FACE_STRING is not nil, FACE_STRING_POS is a position in
12228 FACE_STRING. Display STRING or LISP_STRING with the face at
12229 FACE_STRING_POS in FACE_STRING:
12231 Display the string in the environment given by IT, but use the
12232 standard display table, temporarily.
12234 FIELD_WIDTH is the minimum number of output glyphs to produce.
12235 If STRING has fewer characters than FIELD_WIDTH, pad to the right
12236 with spaces. If STRING has more characters, more than FIELD_WIDTH
12237 glyphs will be produced. FIELD_WIDTH <= 0 means don't pad.
12239 PRECISION is the maximum number of characters to output from
12240 STRING. PRECISION < 0 means don't truncate the string.
12242 This is roughly equivalent to printf format specifiers:
12244 FIELD_WIDTH PRECISION PRINTF
12245 ----------------------------------------
12251 MULTIBYTE zero means do not display multibyte chars, > 0 means do
12252 display them, and < 0 means obey the current buffer's value of
12253 enable_multibyte_characters.
12255 Value is the number of glyphs produced. */
12258 display_string (string
, lisp_string
, face_string
, face_string_pos
,
12259 start
, it
, field_width
, precision
, max_x
, multibyte
)
12260 unsigned char *string
;
12261 Lisp_Object lisp_string
;
12264 int field_width
, precision
, max_x
;
12267 int hpos_at_start
= it
->hpos
;
12268 int saved_face_id
= it
->face_id
;
12269 struct glyph_row
*row
= it
->glyph_row
;
12271 /* Initialize the iterator IT for iteration over STRING beginning
12272 with index START. We assume that IT may be modified here (which
12273 means that display_line has to do something when displaying a
12274 mini-buffer prompt, which it does). */
12275 reseat_to_string (it
, string
, lisp_string
, start
,
12276 precision
, field_width
, multibyte
);
12278 /* If displaying STRING, set up the face of the iterator
12279 from LISP_STRING, if that's given. */
12280 if (STRINGP (face_string
))
12286 = face_at_string_position (it
->w
, face_string
, face_string_pos
,
12287 0, it
->region_beg_charpos
,
12288 it
->region_end_charpos
,
12289 &endptr
, it
->base_face_id
);
12290 face
= FACE_FROM_ID (it
->f
, it
->face_id
);
12291 it
->face_box_p
= face
->box
!= FACE_NO_BOX
;
12294 /* Set max_x to the maximum allowed X position. Don't let it go
12295 beyond the right edge of the window. */
12297 max_x
= it
->last_visible_x
;
12299 max_x
= min (max_x
, it
->last_visible_x
);
12301 /* Skip over display elements that are not visible. because IT->w is
12303 if (it
->current_x
< it
->first_visible_x
)
12304 move_it_in_display_line_to (it
, 100000, it
->first_visible_x
,
12305 MOVE_TO_POS
| MOVE_TO_X
);
12307 row
->ascent
= it
->max_ascent
;
12308 row
->height
= it
->max_ascent
+ it
->max_descent
;
12309 row
->phys_ascent
= it
->max_phys_ascent
;
12310 row
->phys_height
= it
->max_phys_ascent
+ it
->max_phys_descent
;
12312 /* This condition is for the case that we are called with current_x
12313 past last_visible_x. */
12314 while (it
->current_x
< max_x
)
12316 int x_before
, x
, n_glyphs_before
, i
, nglyphs
;
12318 /* Get the next display element. */
12319 if (!get_next_display_element (it
))
12322 /* Produce glyphs. */
12323 x_before
= it
->current_x
;
12324 n_glyphs_before
= it
->glyph_row
->used
[TEXT_AREA
];
12325 PRODUCE_GLYPHS (it
);
12327 nglyphs
= it
->glyph_row
->used
[TEXT_AREA
] - n_glyphs_before
;
12330 while (i
< nglyphs
)
12332 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + n_glyphs_before
+ i
;
12334 if (!it
->truncate_lines_p
12335 && x
+ glyph
->pixel_width
> max_x
)
12337 /* End of continued line or max_x reached. */
12338 it
->glyph_row
->used
[TEXT_AREA
] = n_glyphs_before
+ i
;
12342 else if (x
+ glyph
->pixel_width
> it
->first_visible_x
)
12344 /* Glyph is at least partially visible. */
12346 if (x
< it
->first_visible_x
)
12347 it
->glyph_row
->x
= x
- it
->first_visible_x
;
12351 /* Glyph is off the left margin of the display area.
12352 Should not happen. */
12356 row
->ascent
= max (row
->ascent
, it
->max_ascent
);
12357 row
->height
= max (row
->height
, it
->max_ascent
+ it
->max_descent
);
12358 row
->phys_ascent
= max (row
->phys_ascent
, it
->max_phys_ascent
);
12359 row
->phys_height
= max (row
->phys_height
,
12360 it
->max_phys_ascent
+ it
->max_phys_descent
);
12361 x
+= glyph
->pixel_width
;
12365 /* Stop if max_x reached. */
12369 /* Stop at line ends. */
12370 if (ITERATOR_AT_END_OF_LINE_P (it
))
12372 it
->continuation_lines_width
= 0;
12376 set_iterator_to_next (it
);
12378 /* Stop if truncating at the right edge. */
12379 if (it
->truncate_lines_p
12380 && it
->current_x
>= it
->last_visible_x
)
12382 /* Add truncation mark, but don't do it if the line is
12383 truncated at a padding space. */
12384 if (IT_CHARPOS (*it
) < it
->string_nchars
)
12386 if (!FRAME_WINDOW_P (it
->f
))
12387 produce_special_glyphs (it
, IT_TRUNCATION
);
12388 it
->glyph_row
->truncated_on_right_p
= 1;
12394 /* Maybe insert a truncation at the left. */
12395 if (it
->first_visible_x
12396 && IT_CHARPOS (*it
) > 0)
12398 if (!FRAME_WINDOW_P (it
->f
))
12399 insert_left_trunc_glyphs (it
);
12400 it
->glyph_row
->truncated_on_left_p
= 1;
12403 it
->face_id
= saved_face_id
;
12405 /* Value is number of columns displayed. */
12406 return it
->hpos
- hpos_at_start
;
12411 /* This is like a combination of memq and assq. Return 1 if PROPVAL
12412 appears as an element of LIST or as the car of an element of LIST.
12413 If PROPVAL is a list, compare each element against LIST in that
12414 way, and return 1 if any element of PROPVAL is found in LIST.
12415 Otherwise return 0. This function cannot quit. */
12418 invisible_p (propval
, list
)
12419 register Lisp_Object propval
;
12422 register Lisp_Object tail
, proptail
;
12423 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
12425 register Lisp_Object tem
;
12427 if (EQ (propval
, tem
))
12429 if (CONSP (tem
) && EQ (propval
, XCAR (tem
)))
12432 if (CONSP (propval
))
12433 for (proptail
= propval
; CONSP (proptail
);
12434 proptail
= XCDR (proptail
))
12436 Lisp_Object propelt
;
12437 propelt
= XCAR (proptail
);
12438 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
12440 register Lisp_Object tem
;
12442 if (EQ (propelt
, tem
))
12444 if (CONSP (tem
) && EQ (propelt
, XCAR (tem
)))
12452 /* Return 1 if PROPVAL appears as the car of an element of LIST and
12453 the cdr of that element is non-nil. If PROPVAL is a list, check
12454 each element of PROPVAL in that way, and the first time some
12455 element is found, return 1 if the cdr of that element is non-nil.
12456 Otherwise return 0. This function cannot quit. */
12459 invisible_ellipsis_p (propval
, list
)
12460 register Lisp_Object propval
;
12463 register Lisp_Object tail
, proptail
;
12465 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
12467 register Lisp_Object tem
;
12469 if (CONSP (tem
) && EQ (propval
, XCAR (tem
)))
12470 return ! NILP (XCDR (tem
));
12473 if (CONSP (propval
))
12474 for (proptail
= propval
; CONSP (proptail
); proptail
= XCDR (proptail
))
12476 Lisp_Object propelt
;
12477 propelt
= XCAR (proptail
);
12478 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
12480 register Lisp_Object tem
;
12482 if (CONSP (tem
) && EQ (propelt
, XCAR (tem
)))
12483 return ! NILP (XCDR (tem
));
12492 /***********************************************************************
12494 ***********************************************************************/
12499 Vwith_echo_area_save_vector
= Qnil
;
12500 staticpro (&Vwith_echo_area_save_vector
);
12502 Vmessage_stack
= Qnil
;
12503 staticpro (&Vmessage_stack
);
12505 Qinhibit_redisplay
= intern ("inhibit-redisplay");
12506 staticpro (&Qinhibit_redisplay
);
12509 defsubr (&Sdump_glyph_matrix
);
12510 defsubr (&Sdump_glyph_row
);
12511 defsubr (&Sdump_tool_bar_row
);
12512 defsubr (&Strace_redisplay_toggle
);
12515 staticpro (&Qmenu_bar_update_hook
);
12516 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
12518 staticpro (&Qoverriding_terminal_local_map
);
12519 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
12521 staticpro (&Qoverriding_local_map
);
12522 Qoverriding_local_map
= intern ("overriding-local-map");
12524 staticpro (&Qwindow_scroll_functions
);
12525 Qwindow_scroll_functions
= intern ("window-scroll-functions");
12527 staticpro (&Qredisplay_end_trigger_functions
);
12528 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
12530 staticpro (&Qinhibit_point_motion_hooks
);
12531 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
12533 staticpro (&Qdisplay
);
12534 Qdisplay
= intern ("display");
12535 staticpro (&Qleft_margin
);
12536 Qspace_width
= intern ("space-width");
12537 staticpro (&Qspace_width
);
12538 Qheight
= intern ("height");
12539 staticpro (&Qheight
);
12540 Qraise
= intern ("raise");
12541 staticpro (&Qraise
);
12542 Qspace
= intern ("space");
12543 staticpro (&Qspace
);
12544 Qleft_margin
= intern ("left-margin");
12545 staticpro (&Qright_margin
);
12546 Qright_margin
= intern ("right-margin");
12547 Qalign_to
= intern ("align-to");
12548 staticpro (&Qalign_to
);
12549 QCalign_to
= intern (":align-to");
12550 staticpro (&QCalign_to
);
12551 Qwidth
= intern ("width");
12552 staticpro (&Qwidth
);
12553 Qrelative_width
= intern ("relative-width");
12554 staticpro (&Qrelative_width
);
12555 QCrelative_width
= intern (":relative-width");
12556 staticpro (&QCrelative_width
);
12557 QCrelative_height
= intern (":relative-height");
12558 staticpro (&QCrelative_height
);
12559 QCeval
= intern (":eval");
12560 staticpro (&QCeval
);
12561 QCwhen
= intern (":when");
12562 staticpro (&QCwhen
);
12563 Qfontified
= intern ("fontified");
12564 staticpro (&Qfontified
);
12565 Qfontification_functions
= intern ("fontification-functions");
12566 staticpro (&Qfontification_functions
);
12567 Qtrailing_whitespace
= intern ("trailing-whitespace");
12568 staticpro (&Qtrailing_whitespace
);
12569 Qimage
= intern ("image");
12570 staticpro (&Qimage
);
12572 staticpro (&last_arrow_position
);
12573 staticpro (&last_arrow_string
);
12574 last_arrow_position
= Qnil
;
12575 last_arrow_string
= Qnil
;
12577 echo_buffer
[0] = echo_buffer
[1] = Qnil
;
12578 staticpro (&echo_buffer
[0]);
12579 staticpro (&echo_buffer
[1]);
12581 echo_area_buffer
[0] = echo_area_buffer
[1] = Qnil
;
12582 staticpro (&echo_area_buffer
[0]);
12583 staticpro (&echo_area_buffer
[1]);
12585 DEFVAR_LISP ("show-trailing-whitespace", &Vshow_trailing_whitespace
,
12586 "Non-nil means highlight trailing whitespace.\n\
12587 The face used for trailing whitespace is `trailing-whitespace'.");
12588 Vshow_trailing_whitespace
= Qnil
;
12590 DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay
,
12591 "Non-nil means don't actually do any redisplay.\n\
12592 This is used for internal purposes.");
12593 Vinhibit_redisplay
= Qnil
;
12595 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
12596 "String (or mode line construct) included (normally) in `mode-line-format'.");
12597 Vglobal_mode_string
= Qnil
;
12599 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
12600 "Marker for where to display an arrow on top of the buffer text.\n\
12601 This must be the beginning of a line in order to work.\n\
12602 See also `overlay-arrow-string'.");
12603 Voverlay_arrow_position
= Qnil
;
12605 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
12606 "String to display as an arrow. See also `overlay-arrow-position'.");
12607 Voverlay_arrow_string
= Qnil
;
12609 DEFVAR_INT ("scroll-step", &scroll_step
,
12610 "*The number of lines to try scrolling a window by when point moves out.\n\
12611 If that fails to bring point back on frame, point is centered instead.\n\
12612 If this is zero, point is always centered after it moves off frame.");
12614 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
12615 "*Scroll up to this many lines, to bring point back on screen.");
12616 scroll_conservatively
= 0;
12618 DEFVAR_INT ("scroll-margin", &scroll_margin
,
12619 "*Number of lines of margin at the top and bottom of a window.\n\
12620 Recenter the window whenever point gets within this many lines\n\
12621 of the top or bottom of the window.");
12625 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
12628 DEFVAR_BOOL ("truncate-partial-width-windows",
12629 &truncate_partial_width_windows
,
12630 "*Non-nil means truncate lines in all windows less than full frame wide.");
12631 truncate_partial_width_windows
= 1;
12633 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
12634 "*Non-nil means use inverse video for the mode line.");
12635 mode_line_inverse_video
= 1;
12637 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
12638 "*Maximum buffer size for which line number should be displayed.\n\
12639 If the buffer is bigger than this, the line number does not appear\n\
12640 in the mode line.");
12641 line_number_display_limit
= 1000000;
12643 DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width
,
12644 "*Maximum line width (in characters) for line number display.\n\
12645 If the average length of the lines near point is bigger than this, then the\n\
12646 line number may be omitted from the mode line.");
12647 line_number_display_limit_width
= 200;
12649 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
12650 "*Non-nil means highlight region even in nonselected windows.");
12651 highlight_nonselected_windows
= 0;
12653 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
12654 "Non-nil if more than one frame is visible on this display.\n\
12655 Minibuffer-only frames don't count, but iconified frames do.\n\
12656 This variable is not guaranteed to be accurate except while processing\n\
12657 `frame-title-format' and `icon-title-format'.");
12659 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
12660 "Template for displaying the title bar of visible frames.\n\
12661 \(Assuming the window manager supports this feature.)\n\
12662 This variable has the same structure as `mode-line-format' (which see),\n\
12663 and is used only on frames for which no explicit name has been set\n\
12664 \(see `modify-frame-parameters').");
12665 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
12666 "Template for displaying the title bar of an iconified frame.\n\
12667 \(Assuming the window manager supports this feature.)\n\
12668 This variable has the same structure as `mode-line-format' (which see),\n\
12669 and is used only on frames for which no explicit name has been set\n\
12670 \(see `modify-frame-parameters').");
12672 = Vframe_title_format
12673 = Fcons (intern ("multiple-frames"),
12674 Fcons (build_string ("%b"),
12675 Fcons (Fcons (build_string (""),
12676 Fcons (intern ("invocation-name"),
12677 Fcons (build_string ("@"),
12678 Fcons (intern ("system-name"),
12682 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
12683 "Maximum number of lines to keep in the message log buffer.\n\
12684 If nil, disable message logging. If t, log messages but don't truncate\n\
12685 the buffer when it becomes large.");
12686 XSETFASTINT (Vmessage_log_max
, 50);
12688 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
12689 "Functions called before redisplay, if window sizes have changed.\n\
12690 The value should be a list of functions that take one argument.\n\
12691 Just before redisplay, for each frame, if any of its windows have changed\n\
12692 size since the last redisplay, or have been split or deleted,\n\
12693 all the functions in the list are called, with the frame as argument.");
12694 Vwindow_size_change_functions
= Qnil
;
12696 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
12697 "List of Functions to call before redisplaying a window with scrolling.\n\
12698 Each function is called with two arguments, the window\n\
12699 and its new display-start position. Note that the value of `window-end'\n\
12700 is not valid when these functions are called.");
12701 Vwindow_scroll_functions
= Qnil
;
12703 DEFVAR_BOOL ("auto-resize-tool-bars", &auto_resize_tool_bars_p
,
12704 "*Non-nil means automatically resize tool-bars.\n\
12705 This increases a tool-bar's height if not all tool-bar items are visible.\n\
12706 It decreases a tool-bar's height when it would display blank lines\n\
12708 auto_resize_tool_bars_p
= 1;
12710 DEFVAR_BOOL ("auto-raise-tool-bar-buttons", &auto_raise_tool_bar_buttons_p
,
12711 "*Non-nil means raise tool-bar buttons when the mouse moves over them.");
12712 auto_raise_tool_bar_buttons_p
= 1;
12714 DEFVAR_INT ("tool-bar-button-margin", &tool_bar_button_margin
,
12715 "*Margin around tool-bar buttons in pixels.");
12716 tool_bar_button_margin
= 1;
12718 DEFVAR_INT ("tool-bar-button-relief", &tool_bar_button_relief
,
12719 "Relief thickness of tool-bar buttons.");
12720 tool_bar_button_relief
= 3;
12722 DEFVAR_LISP ("fontification-functions", &Vfontification_functions
,
12723 "List of functions to call to fontify regions of text.\n\
12724 Each function is called with one argument POS. Functions must\n\
12725 fontify a region starting at POS in the current buffer, and give\n\
12726 fontified regions the property `fontified'.\n\
12727 This variable automatically becomes buffer-local when set.");
12728 Vfontification_functions
= Qnil
;
12729 Fmake_local_variable (Qfontification_functions
);
12731 DEFVAR_BOOL ("unibyte-display-via-language-environment",
12732 &unibyte_display_via_language_environment
,
12733 "*Non-nil means display unibyte text according to language environment.\n\
12734 Specifically this means that unibyte non-ASCII characters\n\
12735 are displayed by converting them to the equivalent multibyte characters\n\
12736 according to the current language environment. As a result, they are\n\
12737 displayed according to the current fontset.");
12738 unibyte_display_via_language_environment
= 0;
12740 DEFVAR_LISP ("max-mini-window-height", &Vmax_mini_window_height
,
12741 "*Maximum height for resizing mini-windows.\n\
12742 If a float, it specifies a fraction of the mini-window frame's height.\n\
12743 If an integer, it specifies a number of lines.\n\
12744 If nil, don't resize.");
12745 Vmax_mini_window_height
= make_float (0.25);
12749 /* Initialize this module when Emacs starts. */
12754 Lisp_Object root_window
;
12755 struct window
*mini_w
;
12757 CHARPOS (this_line_start_pos
) = 0;
12759 mini_w
= XWINDOW (minibuf_window
);
12760 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
12762 if (!noninteractive
)
12764 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
12767 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_TOP_MARGIN (f
));
12768 set_window_height (root_window
,
12769 FRAME_HEIGHT (f
) - 1 - FRAME_TOP_MARGIN (f
),
12771 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
12772 set_window_height (minibuf_window
, 1, 0);
12774 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
12775 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));
12777 scratch_glyph_row
.glyphs
[TEXT_AREA
] = scratch_glyphs
;
12778 scratch_glyph_row
.glyphs
[TEXT_AREA
+ 1]
12779 = scratch_glyphs
+ MAX_SCRATCH_GLYPHS
;
12781 /* The default ellipsis glyphs `...'. */
12782 for (i
= 0; i
< 3; ++i
)
12783 XSETFASTINT (default_invis_vector
[i
], '.');
12786 #ifdef HAVE_WINDOW_SYSTEM
12788 /* Allocate the buffer for frame titles. */
12790 frame_title_buf
= (char *) xmalloc (size
);
12791 frame_title_buf_end
= frame_title_buf
+ size
;
12792 frame_title_ptr
= NULL
;
12794 #endif /* HAVE_WINDOW_SYSTEM */