1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static int showing_window_margins_p
P_ ((struct window
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
196 are supported, so we can check for input during redisplay at
197 regular intervals. */
198 #ifdef EMACS_HAS_USECS
199 #define PERIODIC_PREEMPTION_CHECKING 1
201 #define PERIODIC_PREEMPTION_CHECKING 0
204 #if PERIODIC_PREEMPTION_CHECKING
206 /* If a number (float), check for user input every N seconds. */
208 Lisp_Object Vredisplay_preemption_period
;
210 /* Redisplay preemption timers. */
212 static EMACS_TIME preemption_period
;
213 static EMACS_TIME preemption_next_check
;
217 /* Nonzero upon entry to redisplay means do not assume anything about
218 current contents of actual terminal frame; clear and redraw it. */
222 /* Nonzero means last display completed. Zero means it was preempted. */
224 int display_completed
;
226 /* Lisp variable visible-bell; enables use of screen-flash instead of
231 /* Invert the color of the whole frame, at a low level. */
235 /* Line speed of the terminal. */
239 /* Either nil or a symbol naming the window system under which Emacs
240 creates the first frame. */
242 Lisp_Object Vinitial_window_system
;
244 /* Version number of X windows: 10, 11 or nil. */
246 Lisp_Object Vwindow_system_version
;
248 /* Vector of glyph definitions. Indexed by glyph number, the contents
249 are a string which is how to output the glyph.
251 If Vglyph_table is nil, a glyph is output by using its low 8 bits
254 This is an obsolete feature that is no longer used. The variable
255 is retained for compatibility. */
257 Lisp_Object Vglyph_table
;
259 /* Display table to use for vectors that don't specify their own. */
261 Lisp_Object Vstandard_display_table
;
263 /* Nonzero means reading single-character input with prompt so put
264 cursor on mini-buffer after the prompt. Positive means at end of
265 text in echo area; negative means at beginning of line. */
267 int cursor_in_echo_area
;
269 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
272 /* The currently selected frame. In a single-frame version, this
273 variable always equals the_only_frame. */
275 Lisp_Object selected_frame
;
277 /* A frame which is not just a mini-buffer, or 0 if there are no such
278 frames. This is usually the most recent such frame that was
279 selected. In a single-frame version, this variable always holds
280 the address of the_only_frame. */
282 struct frame
*last_nonminibuf_frame
;
284 /* 1 means SIGWINCH happened when not safe. */
286 int delayed_size_change
;
288 /* 1 means glyph initialization has been completed at startup. */
290 static int glyphs_initialized_initially_p
;
292 /* Updated window if != 0. Set by update_window. */
294 struct window
*updated_window
;
296 /* Glyph row updated in update_window_line, and area that is updated. */
298 struct glyph_row
*updated_row
;
301 /* A glyph for a space. */
303 struct glyph space_glyph
;
305 /* Non-zero means update has been performed directly, so that there's
306 no need for redisplay_internal to do much work. Set by
307 direct_output_for_insert. */
309 int redisplay_performed_directly_p
;
311 /* Counts of allocated structures. These counts serve to diagnose
312 memory leaks and double frees. */
314 int glyph_matrix_count
;
315 int glyph_pool_count
;
317 /* If non-null, the frame whose frame matrices are manipulated. If
318 null, window matrices are worked on. */
320 static struct frame
*frame_matrix_frame
;
322 /* Non-zero means that fonts have been loaded since the last glyph
323 matrix adjustments. Redisplay must stop, and glyph matrices must
324 be adjusted when this flag becomes non-zero during display. The
325 reason fonts can be loaded so late is that fonts of fontsets are
326 loaded on demand. Another reason is that a line contains many
327 characters displayed by zero width or very narrow glyphs of
328 variable-width fonts. */
332 /* Convert vpos and hpos from frame to window and vice versa.
333 This may only be used for terminal frames. */
337 static int window_to_frame_vpos
P_ ((struct window
*, int));
338 static int window_to_frame_hpos
P_ ((struct window
*, int));
339 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
340 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
342 /* One element of the ring buffer containing redisplay history
345 struct redisplay_history
347 char trace
[512 + 100];
350 /* The size of the history buffer. */
352 #define REDISPLAY_HISTORY_SIZE 30
354 /* The redisplay history buffer. */
356 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
358 /* Next free entry in redisplay_history. */
360 static int history_idx
;
362 /* A tick that's incremented each time something is added to the
365 static unsigned history_tick
;
367 static void add_frame_display_history
P_ ((struct frame
*, int));
368 static void add_window_display_history
P_ ((struct window
*, char *, int));
370 /* Add to the redisplay history how window W has been displayed.
371 MSG is a trace containing the information how W's glyph matrix
372 has been constructed. PAUSED_P non-zero means that the update
373 has been interrupted for pending input. */
376 add_window_display_history (w
, msg
, paused_p
)
383 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
385 buf
= redisplay_history
[history_idx
].trace
;
388 sprintf (buf
, "%d: window %p (`%s')%s\n",
391 ((BUFFERP (w
->buffer
)
392 && STRINGP (XBUFFER (w
->buffer
)->name
))
393 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
395 paused_p
? " ***paused***" : "");
400 /* Add to the redisplay history that frame F has been displayed.
401 PAUSED_P non-zero means that the update has been interrupted for
405 add_frame_display_history (f
, paused_p
)
411 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
413 buf
= redisplay_history
[history_idx
].trace
;
416 sprintf (buf
, "%d: update frame %p%s",
418 f
, paused_p
? " ***paused***" : "");
422 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
423 Sdump_redisplay_history
, 0, 0, "",
424 doc
: /* Dump redisplay history to stderr. */)
429 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
432 i
= REDISPLAY_HISTORY_SIZE
- 1;
433 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
440 #else /* GLYPH_DEBUG == 0 */
442 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
443 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
445 #endif /* GLYPH_DEBUG == 0 */
448 /* Like bcopy except never gets confused by overlap. Let this be the
449 first function defined in this file, or change emacs.c where the
450 address of this function is used. */
453 safe_bcopy (from
, to
, size
)
458 if (size
<= 0 || from
== to
)
461 /* If the source and destination don't overlap, then bcopy can
462 handle it. If they do overlap, but the destination is lower in
463 memory than the source, we'll assume bcopy can handle that. */
464 if (to
< from
|| from
+ size
<= to
)
465 bcopy (from
, to
, size
);
467 /* Otherwise, we'll copy from the end. */
470 register const char *endf
= from
+ size
;
471 register char *endt
= to
+ size
;
473 /* If TO - FROM is large, then we should break the copy into
474 nonoverlapping chunks of TO - FROM bytes each. However, if
475 TO - FROM is small, then the bcopy function call overhead
476 makes this not worth it. The crossover point could be about
477 anywhere. Since I don't think the obvious copy loop is too
478 bad, I'm trying to err in its favor. */
483 while (endf
!= from
);
495 bcopy (endf
, endt
, to
- from
);
498 /* If SIZE wasn't a multiple of TO - FROM, there will be a
499 little left over. The amount left over is (endt + (to -
500 from)) - to, which is endt - from. */
501 bcopy (from
, to
, endt
- from
);
508 /***********************************************************************
510 ***********************************************************************/
512 /* Allocate and return a glyph_matrix structure. POOL is the glyph
513 pool from which memory for the matrix should be allocated, or null
514 for window-based redisplay where no glyph pools are used. The
515 member `pool' of the glyph matrix structure returned is set to
516 POOL, the structure is otherwise zeroed. */
518 struct glyph_matrix
*
519 new_glyph_matrix (pool
)
520 struct glyph_pool
*pool
;
522 struct glyph_matrix
*result
;
524 /* Allocate and clear. */
525 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
526 bzero (result
, sizeof *result
);
528 /* Increment number of allocated matrices. This count is used
529 to detect memory leaks. */
530 ++glyph_matrix_count
;
532 /* Set pool and return. */
538 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
540 The global counter glyph_matrix_count is decremented when a matrix
541 is freed. If the count gets negative, more structures were freed
542 than allocated, i.e. one matrix was freed more than once or a bogus
543 pointer was passed to this function.
545 If MATRIX->pool is null, this means that the matrix manages its own
546 glyph memory---this is done for matrices on X frames. Freeing the
547 matrix also frees the glyph memory in this case. */
550 free_glyph_matrix (matrix
)
551 struct glyph_matrix
*matrix
;
557 /* Detect the case that more matrices are freed than were
559 if (--glyph_matrix_count
< 0)
562 /* Free glyph memory if MATRIX owns it. */
563 if (matrix
->pool
== NULL
)
564 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
565 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
567 /* Free row structures and the matrix itself. */
568 xfree (matrix
->rows
);
574 /* Return the number of glyphs to reserve for a marginal area of
575 window W. TOTAL_GLYPHS is the number of glyphs in a complete
576 display line of window W. MARGIN gives the width of the marginal
577 area in canonical character units. MARGIN should be an integer
581 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
588 if (NUMBERP (margin
))
590 int width
= XFASTINT (w
->total_cols
);
591 double d
= max (0, XFLOATINT (margin
));
592 d
= min (width
/ 2 - 1, d
);
593 n
= (int) ((double) total_glyphs
/ width
* d
);
602 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
605 W is null if the function is called for a frame glyph matrix.
606 Otherwise it is the window MATRIX is a member of. X and Y are the
607 indices of the first column and row of MATRIX within the frame
608 matrix, if such a matrix exists. They are zero for purely
609 window-based redisplay. DIM is the needed size of the matrix.
611 In window-based redisplay, where no frame matrices exist, glyph
612 matrices manage their own glyph storage. Otherwise, they allocate
613 storage from a common frame glyph pool which can be found in
616 The reason for this memory management strategy is to avoid complete
617 frame redraws if possible. When we allocate from a common pool, a
618 change of the location or size of a sub-matrix within the pool
619 requires a complete redisplay of the frame because we cannot easily
620 make sure that the current matrices of all windows still agree with
621 what is displayed on the screen. While this is usually fast, it
622 leads to screen flickering. */
625 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
627 struct glyph_matrix
*matrix
;
633 int marginal_areas_changed_p
= 0;
634 int header_line_changed_p
= 0;
635 int header_line_p
= 0;
636 int left
= -1, right
= -1;
637 int window_width
= -1, window_height
= -1;
639 /* See if W had a header line that has disappeared now, or vice versa.
643 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
645 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
646 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
648 matrix
->header_line_p
= header_line_p
;
650 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
651 Do nothing if MATRIX' size, position, vscroll, and marginal areas
652 haven't changed. This optimization is important because preserving
653 the matrix means preventing redisplay. */
654 if (matrix
->pool
== NULL
)
656 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
657 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
658 xassert (left
>= 0 && right
>= 0);
659 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
660 || right
!= matrix
->right_margin_glyphs
);
662 if (!marginal_areas_changed_p
664 && !header_line_changed_p
665 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
666 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
667 && matrix
->window_height
== window_height
668 && matrix
->window_vscroll
== w
->vscroll
669 && matrix
->window_width
== window_width
)
673 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
674 if (matrix
->rows_allocated
< dim
.height
)
676 int size
= dim
.height
* sizeof (struct glyph_row
);
677 new_rows
= dim
.height
- matrix
->rows_allocated
;
678 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
679 bzero (matrix
->rows
+ matrix
->rows_allocated
,
680 new_rows
* sizeof *matrix
->rows
);
681 matrix
->rows_allocated
= dim
.height
;
686 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
687 on a frame not using window-based redisplay. Set up pointers for
688 each row into the glyph pool. */
691 xassert (matrix
->pool
->glyphs
);
695 left
= margin_glyphs_to_reserve (w
, dim
.width
,
696 w
->left_margin_cols
);
697 right
= margin_glyphs_to_reserve (w
, dim
.width
,
698 w
->right_margin_cols
);
703 for (i
= 0; i
< dim
.height
; ++i
)
705 struct glyph_row
*row
= &matrix
->rows
[i
];
707 row
->glyphs
[LEFT_MARGIN_AREA
]
708 = (matrix
->pool
->glyphs
709 + (y
+ i
) * matrix
->pool
->ncolumns
713 || row
== matrix
->rows
+ dim
.height
- 1
714 || (row
== matrix
->rows
&& matrix
->header_line_p
))
716 row
->glyphs
[TEXT_AREA
]
717 = row
->glyphs
[LEFT_MARGIN_AREA
];
718 row
->glyphs
[RIGHT_MARGIN_AREA
]
719 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
720 row
->glyphs
[LAST_AREA
]
721 = row
->glyphs
[RIGHT_MARGIN_AREA
];
725 row
->glyphs
[TEXT_AREA
]
726 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
727 row
->glyphs
[RIGHT_MARGIN_AREA
]
728 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
729 row
->glyphs
[LAST_AREA
]
730 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
734 matrix
->left_margin_glyphs
= left
;
735 matrix
->right_margin_glyphs
= right
;
739 /* If MATRIX->pool is null, MATRIX is responsible for managing
740 its own memory. It is a window matrix for window-based redisplay.
741 Allocate glyph memory from the heap. */
742 if (dim
.width
> matrix
->matrix_w
744 || header_line_changed_p
745 || marginal_areas_changed_p
)
747 struct glyph_row
*row
= matrix
->rows
;
748 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
752 row
->glyphs
[LEFT_MARGIN_AREA
]
753 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
755 * sizeof (struct glyph
)));
757 /* The mode line never has marginal areas. */
758 if (row
== matrix
->rows
+ dim
.height
- 1
759 || (row
== matrix
->rows
&& matrix
->header_line_p
))
761 row
->glyphs
[TEXT_AREA
]
762 = row
->glyphs
[LEFT_MARGIN_AREA
];
763 row
->glyphs
[RIGHT_MARGIN_AREA
]
764 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
765 row
->glyphs
[LAST_AREA
]
766 = row
->glyphs
[RIGHT_MARGIN_AREA
];
770 row
->glyphs
[TEXT_AREA
]
771 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
772 row
->glyphs
[RIGHT_MARGIN_AREA
]
773 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
774 row
->glyphs
[LAST_AREA
]
775 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
781 xassert (left
>= 0 && right
>= 0);
782 matrix
->left_margin_glyphs
= left
;
783 matrix
->right_margin_glyphs
= right
;
786 /* Number of rows to be used by MATRIX. */
787 matrix
->nrows
= dim
.height
;
788 xassert (matrix
->nrows
>= 0);
792 if (matrix
== w
->current_matrix
)
794 /* Mark rows in a current matrix of a window as not having
795 valid contents. It's important to not do this for
796 desired matrices. When Emacs starts, it may already be
797 building desired matrices when this function runs. */
798 if (window_width
< 0)
799 window_width
= window_box_width (w
, -1);
801 /* Optimize the case that only the height has changed (C-x 2,
802 upper window). Invalidate all rows that are no longer part
804 if (!marginal_areas_changed_p
805 && !header_line_changed_p
807 && dim
.width
== matrix
->matrix_w
808 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
809 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
810 && matrix
->window_width
== window_width
)
812 /* Find the last row in the window. */
813 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
814 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
820 /* Window end is invalid, if inside of the rows that
821 are invalidated below. */
822 if (INTEGERP (w
->window_end_vpos
)
823 && XFASTINT (w
->window_end_vpos
) >= i
)
824 w
->window_end_valid
= Qnil
;
826 while (i
< matrix
->nrows
)
827 matrix
->rows
[i
++].enabled_p
= 0;
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
835 else if (matrix
== w
->desired_matrix
)
837 /* Rows in desired matrices always have to be cleared;
838 redisplay expects this is the case when it runs, so it
839 had better be the case when we adjust matrices between
841 for (i
= 0; i
< matrix
->nrows
; ++i
)
842 matrix
->rows
[i
].enabled_p
= 0;
847 /* Remember last values to be able to optimize frame redraws. */
848 matrix
->matrix_x
= x
;
849 matrix
->matrix_y
= y
;
850 matrix
->matrix_w
= dim
.width
;
851 matrix
->matrix_h
= dim
.height
;
853 /* Record the top y location and height of W at the time the matrix
854 was last adjusted. This is used to optimize redisplay above. */
857 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
858 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
859 matrix
->window_height
= window_height
;
860 matrix
->window_width
= window_width
;
861 matrix
->window_vscroll
= w
->vscroll
;
866 /* Reverse the contents of rows in MATRIX between START and END. The
867 contents of the row at END - 1 end up at START, END - 2 at START +
868 1 etc. This is part of the implementation of rotate_matrix (see
872 reverse_rows (matrix
, start
, end
)
873 struct glyph_matrix
*matrix
;
878 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
880 /* Non-ISO HP/UX compiler doesn't like auto struct
882 struct glyph_row temp
;
883 temp
= matrix
->rows
[i
];
884 matrix
->rows
[i
] = matrix
->rows
[j
];
885 matrix
->rows
[j
] = temp
;
890 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
891 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
892 indices. (Note: this does not copy glyphs, only glyph pointers in
893 row structures are moved around).
895 The algorithm used for rotating the vector was, I believe, first
896 described by Kernighan. See the vector R as consisting of two
897 sub-vectors AB, where A has length BY for BY >= 0. The result
898 after rotating is then BA. Reverse both sub-vectors to get ArBr
899 and reverse the result to get (ArBr)r which is BA. Similar for
903 rotate_matrix (matrix
, first
, last
, by
)
904 struct glyph_matrix
*matrix
;
909 /* Up (rotate left, i.e. towards lower indices). */
911 reverse_rows (matrix
, first
, first
+ by
);
912 reverse_rows (matrix
, first
+ by
, last
);
913 reverse_rows (matrix
, first
, last
);
917 /* Down (rotate right, i.e. towards higher indices). */
918 reverse_rows (matrix
, last
- by
, last
);
919 reverse_rows (matrix
, first
, last
- by
);
920 reverse_rows (matrix
, first
, last
);
925 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
926 with indices START <= index < END. Increment positions by DELTA/
930 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
931 struct glyph_matrix
*matrix
;
932 int start
, end
, delta
, delta_bytes
;
934 /* Check that START and END are reasonable values. */
935 xassert (start
>= 0 && start
<= matrix
->nrows
);
936 xassert (end
>= 0 && end
<= matrix
->nrows
);
937 xassert (start
<= end
);
939 for (; start
< end
; ++start
)
940 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
944 /* Enable a range of rows in glyph matrix MATRIX. START and END are
945 the row indices of the first and last + 1 row to enable. If
946 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
949 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
950 struct glyph_matrix
*matrix
;
954 xassert (start
<= end
);
955 xassert (start
>= 0 && start
< matrix
->nrows
);
956 xassert (end
>= 0 && end
<= matrix
->nrows
);
958 for (; start
< end
; ++start
)
959 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
965 This empties all rows in MATRIX by setting the enabled_p flag for
966 all rows of the matrix to zero. The function prepare_desired_row
967 will eventually really clear a row when it sees one with a zero
970 Resets update hints to defaults value. The only update hint
971 currently present is the flag MATRIX->no_scrolling_p. */
974 clear_glyph_matrix (matrix
)
975 struct glyph_matrix
*matrix
;
979 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
980 matrix
->no_scrolling_p
= 0;
985 /* Shift part of the glyph matrix MATRIX of window W up or down.
986 Increment y-positions in glyph rows between START and END by DY,
987 and recompute their visible height. */
990 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
992 struct glyph_matrix
*matrix
;
997 xassert (start
<= end
);
998 xassert (start
>= 0 && start
< matrix
->nrows
);
999 xassert (end
>= 0 && end
<= matrix
->nrows
);
1001 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1002 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1004 for (; start
< end
; ++start
)
1006 struct glyph_row
*row
= &matrix
->rows
[start
];
1009 row
->visible_height
= row
->height
;
1012 row
->visible_height
-= min_y
- row
->y
;
1013 if (row
->y
+ row
->height
> max_y
)
1014 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1019 /* Mark all rows in current matrices of frame F as invalid. Marking
1020 invalid is done by setting enabled_p to zero for all rows in a
1024 clear_current_matrices (f
)
1025 register struct frame
*f
;
1027 /* Clear frame current matrix, if we have one. */
1028 if (f
->current_matrix
)
1029 clear_glyph_matrix (f
->current_matrix
);
1031 /* Clear the matrix of the menu bar window, if such a window exists.
1032 The menu bar window is currently used to display menus on X when
1033 no toolkit support is compiled in. */
1034 if (WINDOWP (f
->menu_bar_window
))
1035 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1037 /* Clear the matrix of the tool-bar window, if any. */
1038 if (WINDOWP (f
->tool_bar_window
))
1039 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1041 /* Clear current window matrices. */
1042 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1043 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1047 /* Clear out all display lines of F for a coming redisplay. */
1050 clear_desired_matrices (f
)
1051 register struct frame
*f
;
1053 if (f
->desired_matrix
)
1054 clear_glyph_matrix (f
->desired_matrix
);
1056 if (WINDOWP (f
->menu_bar_window
))
1057 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1059 if (WINDOWP (f
->tool_bar_window
))
1060 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1062 /* Do it for window matrices. */
1063 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1064 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1068 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1069 non-zero clear desired matrices, otherwise clear current matrices. */
1072 clear_window_matrices (w
, desired_p
)
1078 if (!NILP (w
->hchild
))
1080 xassert (WINDOWP (w
->hchild
));
1081 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1083 else if (!NILP (w
->vchild
))
1085 xassert (WINDOWP (w
->vchild
));
1086 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1091 clear_glyph_matrix (w
->desired_matrix
);
1094 clear_glyph_matrix (w
->current_matrix
);
1095 w
->window_end_valid
= Qnil
;
1099 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1105 /***********************************************************************
1108 See dispextern.h for an overall explanation of glyph rows.
1109 ***********************************************************************/
1111 /* Clear glyph row ROW. Do it in a way that makes it robust against
1112 changes in the glyph_row structure, i.e. addition or removal of
1113 structure members. */
1115 static struct glyph_row null_row
;
1118 clear_glyph_row (row
)
1119 struct glyph_row
*row
;
1121 struct glyph
*p
[1 + LAST_AREA
];
1123 /* Save pointers. */
1124 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1125 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1126 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1127 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1132 /* Restore pointers. */
1133 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1134 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1135 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1136 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1138 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1139 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1140 Redisplay outputs such glyphs, and flickering effects were
1141 the result. This also depended on the contents of memory
1142 returned by xmalloc. If flickering happens again, activate
1143 the code below. If the flickering is gone with that, chances
1144 are that the flickering has the same reason as here. */
1145 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1150 /* Make ROW an empty, enabled row of canonical character height,
1151 in window W starting at y-position Y. */
1154 blank_row (w
, row
, y
)
1156 struct glyph_row
*row
;
1161 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1162 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1164 clear_glyph_row (row
);
1166 row
->ascent
= row
->phys_ascent
= 0;
1167 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1168 row
->visible_height
= row
->height
;
1171 row
->visible_height
-= min_y
- row
->y
;
1172 if (row
->y
+ row
->height
> max_y
)
1173 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1179 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1180 are the amounts by which to change positions. Note that the first
1181 glyph of the text area of a row can have a buffer position even if
1182 the used count of the text area is zero. Such rows display line
1186 increment_row_positions (row
, delta
, delta_bytes
)
1187 struct glyph_row
*row
;
1188 int delta
, delta_bytes
;
1192 /* Increment start and end positions. */
1193 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1194 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1195 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1196 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1198 if (!row
->enabled_p
)
1201 /* Increment positions in glyphs. */
1202 for (area
= 0; area
< LAST_AREA
; ++area
)
1203 for (i
= 0; i
< row
->used
[area
]; ++i
)
1204 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1205 && row
->glyphs
[area
][i
].charpos
> 0)
1206 row
->glyphs
[area
][i
].charpos
+= delta
;
1208 /* Capture the case of rows displaying a line end. */
1209 if (row
->used
[TEXT_AREA
] == 0
1210 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1211 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1216 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1217 contents, i.e. glyph structure contents are exchanged between A and
1218 B without changing glyph pointers in A and B. */
1221 swap_glyphs_in_rows (a
, b
)
1222 struct glyph_row
*a
, *b
;
1226 for (area
= 0; area
< LAST_AREA
; ++area
)
1228 /* Number of glyphs to swap. */
1229 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1231 /* Start of glyphs in area of row A. */
1232 struct glyph
*glyph_a
= a
->glyphs
[area
];
1234 /* End + 1 of glyphs in area of row A. */
1235 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1237 /* Start of glyphs in area of row B. */
1238 struct glyph
*glyph_b
= b
->glyphs
[area
];
1240 while (glyph_a
< glyph_a_end
)
1242 /* Non-ISO HP/UX compiler doesn't like auto struct
1246 *glyph_a
= *glyph_b
;
1256 /* Exchange pointers to glyph memory between glyph rows A and B. */
1259 swap_glyph_pointers (a
, b
)
1260 struct glyph_row
*a
, *b
;
1263 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1265 struct glyph
*temp
= a
->glyphs
[i
];
1266 a
->glyphs
[i
] = b
->glyphs
[i
];
1267 b
->glyphs
[i
] = temp
;
1272 /* Copy glyph row structure FROM to glyph row structure TO, except
1273 that glyph pointers in the structures are left unchanged. */
1276 copy_row_except_pointers (to
, from
)
1277 struct glyph_row
*to
, *from
;
1279 struct glyph
*pointers
[1 + LAST_AREA
];
1281 /* Save glyph pointers of TO. */
1282 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1284 /* Do a structure assignment. */
1287 /* Restore original pointers of TO. */
1288 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1292 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1293 TO and FROM are left unchanged. Glyph contents are copied from the
1294 glyph memory of FROM to the glyph memory of TO. Increment buffer
1295 positions in row TO by DELTA/ DELTA_BYTES. */
1298 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1299 struct glyph_row
*to
, *from
;
1300 int delta
, delta_bytes
;
1304 /* This is like a structure assignment TO = FROM, except that
1305 glyph pointers in the rows are left unchanged. */
1306 copy_row_except_pointers (to
, from
);
1308 /* Copy glyphs from FROM to TO. */
1309 for (area
= 0; area
< LAST_AREA
; ++area
)
1310 if (from
->used
[area
])
1311 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1312 from
->used
[area
] * sizeof (struct glyph
));
1314 /* Increment buffer positions in TO by DELTA. */
1315 increment_row_positions (to
, delta
, delta_bytes
);
1319 /* Assign glyph row FROM to glyph row TO. This works like a structure
1320 assignment TO = FROM, except that glyph pointers are not copied but
1321 exchanged between TO and FROM. Pointers must be exchanged to avoid
1325 assign_row (to
, from
)
1326 struct glyph_row
*to
, *from
;
1328 swap_glyph_pointers (to
, from
);
1329 copy_row_except_pointers (to
, from
);
1333 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1334 a row in a window matrix, is a slice of the glyph memory of the
1335 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1336 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1337 memory of FRAME_ROW. */
1342 glyph_row_slice_p (window_row
, frame_row
)
1343 struct glyph_row
*window_row
, *frame_row
;
1345 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1346 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1347 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1349 return (frame_glyph_start
<= window_glyph_start
1350 && window_glyph_start
< frame_glyph_end
);
1353 #endif /* GLYPH_DEBUG */
1357 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1358 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1359 in WINDOW_MATRIX is found satisfying the condition. */
1361 static struct glyph_row
*
1362 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1363 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1368 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1370 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1371 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1372 frame_matrix
->rows
+ row
))
1375 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1380 /* Prepare ROW for display. Desired rows are cleared lazily,
1381 i.e. they are only marked as to be cleared by setting their
1382 enabled_p flag to zero. When a row is to be displayed, a prior
1383 call to this function really clears it. */
1386 prepare_desired_row (row
)
1387 struct glyph_row
*row
;
1389 if (!row
->enabled_p
)
1391 unsigned rp
= row
->reversed_p
;
1393 clear_glyph_row (row
);
1395 row
->reversed_p
= rp
;
1400 /* Return a hash code for glyph row ROW. */
1403 line_hash_code (row
)
1404 struct glyph_row
*row
;
1410 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1411 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1415 int c
= glyph
->u
.ch
;
1416 int face_id
= glyph
->face_id
;
1417 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1419 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1420 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1432 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1433 the number of characters in the line. If must_write_spaces is
1434 zero, leading and trailing spaces are ignored. */
1437 line_draw_cost (matrix
, vpos
)
1438 struct glyph_matrix
*matrix
;
1441 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1442 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1443 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1445 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1446 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1448 /* Ignore trailing and leading spaces if we can. */
1449 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1451 /* Skip from the end over trailing spaces. */
1452 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1455 /* All blank line. */
1459 /* Skip over leading spaces. */
1460 while (CHAR_GLYPH_SPACE_P (*beg
))
1464 /* If we don't have a glyph-table, each glyph is one character,
1465 so return the number of glyphs. */
1466 if (glyph_table_base
== 0)
1470 /* Otherwise, scan the glyphs and accumulate their total length
1477 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1479 if (GLYPH_INVALID_P (g
)
1480 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1483 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1493 /* Test two glyph rows A and B for equality. Value is non-zero if A
1494 and B have equal contents. W is the window to which the glyphs
1495 rows A and B belong. It is needed here to test for partial row
1496 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1497 flags of A and B, too. */
1500 row_equal_p (w
, a
, b
, mouse_face_p
)
1502 struct glyph_row
*a
, *b
;
1507 else if (a
->hash
!= b
->hash
)
1511 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1514 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1517 /* Compare glyphs. */
1518 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1520 if (a
->used
[area
] != b
->used
[area
])
1523 a_glyph
= a
->glyphs
[area
];
1524 a_end
= a_glyph
+ a
->used
[area
];
1525 b_glyph
= b
->glyphs
[area
];
1527 while (a_glyph
< a_end
1528 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1529 ++a_glyph
, ++b_glyph
;
1531 if (a_glyph
!= a_end
)
1535 if (a
->fill_line_p
!= b
->fill_line_p
1536 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1537 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1538 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1539 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1540 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1541 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1542 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1543 || a
->overlapped_p
!= b
->overlapped_p
1544 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1545 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1546 || a
->reversed_p
!= b
->reversed_p
1547 /* Different partially visible characters on left margin. */
1549 /* Different height. */
1550 || a
->ascent
!= b
->ascent
1551 || a
->phys_ascent
!= b
->phys_ascent
1552 || a
->phys_height
!= b
->phys_height
1553 || a
->visible_height
!= b
->visible_height
)
1562 /***********************************************************************
1565 See dispextern.h for an overall explanation of glyph pools.
1566 ***********************************************************************/
1568 /* Allocate a glyph_pool structure. The structure returned is
1569 initialized with zeros. The global variable glyph_pool_count is
1570 incremented for each pool allocated. */
1572 static struct glyph_pool
*
1575 struct glyph_pool
*result
;
1577 /* Allocate a new glyph_pool and clear it. */
1578 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1579 bzero (result
, sizeof *result
);
1581 /* For memory leak and double deletion checking. */
1588 /* Free a glyph_pool structure POOL. The function may be called with
1589 a null POOL pointer. The global variable glyph_pool_count is
1590 decremented with every pool structure freed. If this count gets
1591 negative, more structures were freed than allocated, i.e. one
1592 structure must have been freed more than once or a bogus pointer
1593 was passed to free_glyph_pool. */
1596 free_glyph_pool (pool
)
1597 struct glyph_pool
*pool
;
1601 /* More freed than allocated? */
1603 xassert (glyph_pool_count
>= 0);
1605 xfree (pool
->glyphs
);
1611 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1612 columns we need. This function never shrinks a pool. The only
1613 case in which this would make sense, would be when a frame's size
1614 is changed from a large value to a smaller one. But, if someone
1615 does it once, we can expect that he will do it again.
1617 Value is non-zero if the pool changed in a way which makes
1618 re-adjusting window glyph matrices necessary. */
1621 realloc_glyph_pool (pool
, matrix_dim
)
1622 struct glyph_pool
*pool
;
1623 struct dim matrix_dim
;
1628 changed_p
= (pool
->glyphs
== 0
1629 || matrix_dim
.height
!= pool
->nrows
1630 || matrix_dim
.width
!= pool
->ncolumns
);
1632 /* Enlarge the glyph pool. */
1633 needed
= matrix_dim
.width
* matrix_dim
.height
;
1634 if (needed
> pool
->nglyphs
)
1636 int size
= needed
* sizeof (struct glyph
);
1639 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1642 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1643 bzero (pool
->glyphs
, size
);
1646 pool
->nglyphs
= needed
;
1649 /* Remember the number of rows and columns because (a) we use them
1650 to do sanity checks, and (b) the number of columns determines
1651 where rows in the frame matrix start---this must be available to
1652 determine pointers to rows of window sub-matrices. */
1653 pool
->nrows
= matrix_dim
.height
;
1654 pool
->ncolumns
= matrix_dim
.width
;
1661 /***********************************************************************
1663 ***********************************************************************/
1668 /* Flush standard output. This is sometimes useful to call from the debugger.
1669 XXX Maybe this should be changed to flush the current terminal instead of
1680 /* Check that no glyph pointers have been lost in MATRIX. If a
1681 pointer has been lost, e.g. by using a structure assignment between
1682 rows, at least one pointer must occur more than once in the rows of
1686 check_matrix_pointer_lossage (matrix
)
1687 struct glyph_matrix
*matrix
;
1691 for (i
= 0; i
< matrix
->nrows
; ++i
)
1692 for (j
= 0; j
< matrix
->nrows
; ++j
)
1694 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1695 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1699 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1702 matrix_row (matrix
, row
)
1703 struct glyph_matrix
*matrix
;
1706 xassert (matrix
&& matrix
->rows
);
1707 xassert (row
>= 0 && row
< matrix
->nrows
);
1709 /* That's really too slow for normal testing because this function
1710 is called almost everywhere. Although---it's still astonishingly
1711 fast, so it is valuable to have for debugging purposes. */
1713 check_matrix_pointer_lossage (matrix
);
1716 return matrix
->rows
+ row
;
1720 #if 0 /* This function makes invalid assumptions when text is
1721 partially invisible. But it might come handy for debugging
1724 /* Check invariants that must hold for an up to date current matrix of
1728 check_matrix_invariants (w
)
1731 struct glyph_matrix
*matrix
= w
->current_matrix
;
1732 int yb
= window_text_bottom_y (w
);
1733 struct glyph_row
*row
= matrix
->rows
;
1734 struct glyph_row
*last_text_row
= NULL
;
1735 struct buffer
*saved
= current_buffer
;
1736 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1739 /* This can sometimes happen for a fresh window. */
1740 if (matrix
->nrows
< 2)
1743 set_buffer_temp (buffer
);
1745 /* Note: last row is always reserved for the mode line. */
1746 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1747 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1749 struct glyph_row
*next
= row
+ 1;
1751 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1752 last_text_row
= row
;
1754 /* Check that character and byte positions are in sync. */
1755 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1756 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1758 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1759 have such a position temporarily in case of a minibuffer
1760 displaying something like `[Sole completion]' at its end. */
1761 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1762 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1763 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1765 /* Check that end position of `row' is equal to start position
1767 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1769 xassert (MATRIX_ROW_END_CHARPOS (row
)
1770 == MATRIX_ROW_START_CHARPOS (next
));
1771 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1772 == MATRIX_ROW_START_BYTEPOS (next
));
1777 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1778 xassert (w
->desired_matrix
->rows
!= NULL
);
1779 set_buffer_temp (saved
);
1784 #endif /* GLYPH_DEBUG != 0 */
1788 /**********************************************************************
1789 Allocating/ Adjusting Glyph Matrices
1790 **********************************************************************/
1792 /* Allocate glyph matrices over a window tree for a frame-based
1795 X and Y are column/row within the frame glyph matrix where
1796 sub-matrices for the window tree rooted at WINDOW must be
1797 allocated. DIM_ONLY_P non-zero means that the caller of this
1798 function is only interested in the result matrix dimension, and
1799 matrix adjustments should not be performed.
1801 The function returns the total width/height of the sub-matrices of
1802 the window tree. If called on a frame root window, the computation
1803 will take the mini-buffer window into account.
1805 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1807 NEW_LEAF_MATRIX set if any window in the tree did not have a
1808 glyph matrices yet, and
1810 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1811 any window in the tree will be changed or have been changed (see
1814 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1817 Windows are arranged into chains of windows on the same level
1818 through the next fields of window structures. Such a level can be
1819 either a sequence of horizontally adjacent windows from left to
1820 right, or a sequence of vertically adjacent windows from top to
1821 bottom. Each window in a horizontal sequence can be either a leaf
1822 window or a vertical sequence; a window in a vertical sequence can
1823 be either a leaf or a horizontal sequence. All windows in a
1824 horizontal sequence have the same height, and all windows in a
1825 vertical sequence have the same width.
1827 This function uses, for historical reasons, a more general
1828 algorithm to determine glyph matrix dimensions that would be
1831 The matrix height of a horizontal sequence is determined by the
1832 maximum height of any matrix in the sequence. The matrix width of
1833 a horizontal sequence is computed by adding up matrix widths of
1834 windows in the sequence.
1836 |<------- result width ------->|
1837 +---------+----------+---------+ ---
1840 +---------+ | | result height
1845 The matrix width of a vertical sequence is the maximum matrix width
1846 of any window in the sequence. Its height is computed by adding up
1847 matrix heights of windows in the sequence.
1849 |<---- result width -->|
1857 +------------+---------+ |
1860 +------------+---------+ --- */
1862 /* Bit indicating that a new matrix will be allocated or has been
1865 #define NEW_LEAF_MATRIX (1 << 0)
1867 /* Bit indicating that a matrix will or has changed its location or
1870 #define CHANGED_LEAF_MATRIX (1 << 1)
1873 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1874 window_change_flags
)
1878 int *window_change_flags
;
1880 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1882 int wmax
= 0, hmax
= 0;
1886 int in_horz_combination_p
;
1888 /* What combination is WINDOW part of? Compute this once since the
1889 result is the same for all windows in the `next' chain. The
1890 special case of a root window (parent equal to nil) is treated
1891 like a vertical combination because a root window's `next'
1892 points to the mini-buffer window, if any, which is arranged
1893 vertically below other windows. */
1894 in_horz_combination_p
1895 = (!NILP (XWINDOW (window
)->parent
)
1896 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1898 /* For WINDOW and all windows on the same level. */
1901 w
= XWINDOW (window
);
1903 /* Get the dimension of the window sub-matrix for W, depending
1904 on whether this is a combination or a leaf window. */
1905 if (!NILP (w
->hchild
))
1906 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1908 window_change_flags
);
1909 else if (!NILP (w
->vchild
))
1910 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1912 window_change_flags
);
1915 /* If not already done, allocate sub-matrix structures. */
1916 if (w
->desired_matrix
== NULL
)
1918 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1919 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1920 *window_change_flags
|= NEW_LEAF_MATRIX
;
1923 /* Width and height MUST be chosen so that there are no
1924 holes in the frame matrix. */
1925 dim
.width
= required_matrix_width (w
);
1926 dim
.height
= required_matrix_height (w
);
1928 /* Will matrix be re-allocated? */
1929 if (x
!= w
->desired_matrix
->matrix_x
1930 || y
!= w
->desired_matrix
->matrix_y
1931 || dim
.width
!= w
->desired_matrix
->matrix_w
1932 || dim
.height
!= w
->desired_matrix
->matrix_h
1933 || (margin_glyphs_to_reserve (w
, dim
.width
,
1934 w
->left_margin_cols
)
1935 != w
->desired_matrix
->left_margin_glyphs
)
1936 || (margin_glyphs_to_reserve (w
, dim
.width
,
1937 w
->right_margin_cols
)
1938 != w
->desired_matrix
->right_margin_glyphs
))
1939 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1941 /* Actually change matrices, if allowed. Do not consider
1942 CHANGED_LEAF_MATRIX computed above here because the pool
1943 may have been changed which we don't now here. We trust
1944 that we only will be called with DIM_ONLY_P != 0 when
1948 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1949 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1953 /* If we are part of a horizontal combination, advance x for
1954 windows to the right of W; otherwise advance y for windows
1956 if (in_horz_combination_p
)
1961 /* Remember maximum glyph matrix dimensions. */
1962 wmax
= max (wmax
, dim
.width
);
1963 hmax
= max (hmax
, dim
.height
);
1965 /* Next window on same level. */
1968 while (!NILP (window
));
1970 /* Set `total' to the total glyph matrix dimension of this window
1971 level. In a vertical combination, the width is the width of the
1972 widest window; the height is the y we finally reached, corrected
1973 by the y we started with. In a horizontal combination, the total
1974 height is the height of the tallest window, and the width is the
1975 x we finally reached, corrected by the x we started with. */
1976 if (in_horz_combination_p
)
1978 total
.width
= x
- x0
;
1979 total
.height
= hmax
;
1984 total
.height
= y
- y0
;
1991 /* Return the required height of glyph matrices for window W. */
1994 required_matrix_height (w
)
1997 #ifdef HAVE_WINDOW_SYSTEM
1998 struct frame
*f
= XFRAME (w
->frame
);
2000 if (FRAME_WINDOW_P (f
))
2002 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2003 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
2004 return (((window_pixel_height
+ ch_height
- 1)
2005 / ch_height
) * w
->nrows_scale_factor
2006 /* One partially visible line at the top and
2007 bottom of the window. */
2009 /* 2 for header and mode line. */
2012 #endif /* HAVE_WINDOW_SYSTEM */
2014 return WINDOW_TOTAL_LINES (w
);
2018 /* Return the required width of glyph matrices for window W. */
2021 required_matrix_width (w
)
2024 #ifdef HAVE_WINDOW_SYSTEM
2025 struct frame
*f
= XFRAME (w
->frame
);
2026 if (FRAME_WINDOW_P (f
))
2028 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2029 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2031 /* Compute number of glyphs needed in a glyph row. */
2032 return (((window_pixel_width
+ ch_width
- 1)
2033 / ch_width
) * w
->ncols_scale_factor
2034 /* 2 partially visible columns in the text area. */
2036 /* One partially visible column at the right
2037 edge of each marginal area. */
2040 #endif /* HAVE_WINDOW_SYSTEM */
2042 return XINT (w
->total_cols
);
2046 /* Allocate window matrices for window-based redisplay. W is the
2047 window whose matrices must be allocated/reallocated. */
2050 allocate_matrices_for_window_redisplay (w
)
2055 if (!NILP (w
->vchild
))
2056 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2057 else if (!NILP (w
->hchild
))
2058 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2061 /* W is a leaf window. */
2064 /* If matrices are not yet allocated, allocate them now. */
2065 if (w
->desired_matrix
== NULL
)
2067 w
->desired_matrix
= new_glyph_matrix (NULL
);
2068 w
->current_matrix
= new_glyph_matrix (NULL
);
2071 dim
.width
= required_matrix_width (w
);
2072 dim
.height
= required_matrix_height (w
);
2073 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2074 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2077 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2082 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2083 do it for all frames; otherwise do it just for the given frame.
2084 This function must be called when a new frame is created, its size
2085 changes, or its window configuration changes. */
2091 /* Block input so that expose events and other events that access
2092 glyph matrices are not processed while we are changing them. */
2096 adjust_frame_glyphs (f
);
2099 Lisp_Object tail
, lisp_frame
;
2101 FOR_EACH_FRAME (tail
, lisp_frame
)
2102 adjust_frame_glyphs (XFRAME (lisp_frame
));
2109 /* Adjust frame glyphs when Emacs is initialized.
2111 To be called from init_display.
2113 We need a glyph matrix because redraw will happen soon.
2114 Unfortunately, window sizes on selected_frame are not yet set to
2115 meaningful values. I believe we can assume that there are only two
2116 windows on the frame---the mini-buffer and the root window. Frame
2117 height and width seem to be correct so far. So, set the sizes of
2118 windows to estimated values. */
2121 adjust_frame_glyphs_initially ()
2123 struct frame
*sf
= SELECTED_FRAME ();
2124 struct window
*root
= XWINDOW (sf
->root_window
);
2125 struct window
*mini
= XWINDOW (root
->next
);
2126 int frame_lines
= FRAME_LINES (sf
);
2127 int frame_cols
= FRAME_COLS (sf
);
2128 int top_margin
= FRAME_TOP_MARGIN (sf
);
2130 /* Do it for the root window. */
2131 XSETFASTINT (root
->top_line
, top_margin
);
2132 XSETFASTINT (root
->total_cols
, frame_cols
);
2133 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2135 /* Do it for the mini-buffer window. */
2136 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2137 XSETFASTINT (mini
->total_cols
, frame_cols
);
2138 set_window_height (root
->next
, 1, 0);
2140 adjust_frame_glyphs (sf
);
2141 glyphs_initialized_initially_p
= 1;
2145 /* Allocate/reallocate glyph matrices of a single frame F. */
2148 adjust_frame_glyphs (f
)
2151 if (FRAME_WINDOW_P (f
))
2152 adjust_frame_glyphs_for_window_redisplay (f
);
2154 adjust_frame_glyphs_for_frame_redisplay (f
);
2156 /* Don't forget the message buffer and the buffer for
2157 decode_mode_spec. */
2158 adjust_frame_message_buffer (f
);
2159 adjust_decode_mode_spec_buffer (f
);
2161 f
->glyphs_initialized_p
= 1;
2164 /* Return 1 if any window in the tree has nonzero window margins. See
2165 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2167 showing_window_margins_p (w
)
2172 if (!NILP (w
->hchild
))
2174 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2177 else if (!NILP (w
->vchild
))
2179 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2182 else if (!NILP (w
->left_margin_cols
)
2183 || !NILP (w
->right_margin_cols
))
2186 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2192 /* In the window tree with root W, build current matrices of leaf
2193 windows from the frame's current matrix. */
2196 fake_current_matrices (window
)
2201 for (; !NILP (window
); window
= w
->next
)
2203 w
= XWINDOW (window
);
2205 if (!NILP (w
->hchild
))
2206 fake_current_matrices (w
->hchild
);
2207 else if (!NILP (w
->vchild
))
2208 fake_current_matrices (w
->vchild
);
2212 struct frame
*f
= XFRAME (w
->frame
);
2213 struct glyph_matrix
*m
= w
->current_matrix
;
2214 struct glyph_matrix
*fm
= f
->current_matrix
;
2216 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2217 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2219 for (i
= 0; i
< m
->matrix_h
; ++i
)
2221 struct glyph_row
*r
= m
->rows
+ i
;
2222 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2224 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2225 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2227 r
->enabled_p
= fr
->enabled_p
;
2230 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2231 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2232 r
->used
[TEXT_AREA
] = (m
->matrix_w
2233 - r
->used
[LEFT_MARGIN_AREA
]
2234 - r
->used
[RIGHT_MARGIN_AREA
]);
2243 /* Save away the contents of frame F's current frame matrix. Value is
2244 a glyph matrix holding the contents of F's current frame matrix. */
2246 static struct glyph_matrix
*
2247 save_current_matrix (f
)
2251 struct glyph_matrix
*saved
;
2253 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2254 bzero (saved
, sizeof *saved
);
2255 saved
->nrows
= f
->current_matrix
->nrows
;
2256 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2257 * sizeof *saved
->rows
);
2258 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2260 for (i
= 0; i
< saved
->nrows
; ++i
)
2262 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2263 struct glyph_row
*to
= saved
->rows
+ i
;
2264 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2265 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2266 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2267 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2274 /* Restore the contents of frame F's current frame matrix from SAVED,
2275 and free memory associated with SAVED. */
2278 restore_current_matrix (f
, saved
)
2280 struct glyph_matrix
*saved
;
2284 for (i
= 0; i
< saved
->nrows
; ++i
)
2286 struct glyph_row
*from
= saved
->rows
+ i
;
2287 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2288 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2289 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2290 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2291 xfree (from
->glyphs
[TEXT_AREA
]);
2294 xfree (saved
->rows
);
2300 /* Allocate/reallocate glyph matrices of a single frame F for
2301 frame-based redisplay. */
2304 adjust_frame_glyphs_for_frame_redisplay (f
)
2307 struct dim matrix_dim
;
2309 int window_change_flags
;
2312 if (!FRAME_LIVE_P (f
))
2315 top_window_y
= FRAME_TOP_MARGIN (f
);
2317 /* Allocate glyph pool structures if not already done. */
2318 if (f
->desired_pool
== NULL
)
2320 f
->desired_pool
= new_glyph_pool ();
2321 f
->current_pool
= new_glyph_pool ();
2324 /* Allocate frames matrix structures if needed. */
2325 if (f
->desired_matrix
== NULL
)
2327 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2328 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2331 /* Compute window glyph matrices. (This takes the mini-buffer
2332 window into account). The result is the size of the frame glyph
2333 matrix needed. The variable window_change_flags is set to a bit
2334 mask indicating whether new matrices will be allocated or
2335 existing matrices change their size or location within the frame
2337 window_change_flags
= 0;
2339 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2342 &window_change_flags
);
2344 /* Add in menu bar lines, if any. */
2345 matrix_dim
.height
+= top_window_y
;
2347 /* Enlarge pools as necessary. */
2348 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2349 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2351 /* Set up glyph pointers within window matrices. Do this only if
2352 absolutely necessary since it requires a frame redraw. */
2353 if (pool_changed_p
|| window_change_flags
)
2355 /* Do it for window matrices. */
2356 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2358 &window_change_flags
);
2360 /* Size of frame matrices must equal size of frame. Note
2361 that we are called for X frames with window widths NOT equal
2362 to the frame width (from CHANGE_FRAME_SIZE_1). */
2363 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2364 && matrix_dim
.height
== FRAME_LINES (f
));
2366 /* Pointers to glyph memory in glyph rows are exchanged during
2367 the update phase of redisplay, which means in general that a
2368 frame's current matrix consists of pointers into both the
2369 desired and current glyph pool of the frame. Adjusting a
2370 matrix sets the frame matrix up so that pointers are all into
2371 the same pool. If we want to preserve glyph contents of the
2372 current matrix over a call to adjust_glyph_matrix, we must
2373 make a copy of the current glyphs, and restore the current
2374 matrix' contents from that copy. */
2375 if (display_completed
2376 && !FRAME_GARBAGED_P (f
)
2377 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2378 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2379 /* For some reason, the frame glyph matrix gets corrupted if
2380 any of the windows contain margins. I haven't been able
2381 to hunt down the reason, but for the moment this prevents
2382 the problem from manifesting. -- cyd */
2383 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2385 struct glyph_matrix
*copy
= save_current_matrix (f
);
2386 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2387 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2388 restore_current_matrix (f
, copy
);
2389 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2393 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2394 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2395 SET_FRAME_GARBAGED (f
);
2401 /* Allocate/reallocate glyph matrices of a single frame F for
2402 window-based redisplay. */
2405 adjust_frame_glyphs_for_window_redisplay (f
)
2410 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2412 /* Allocate/reallocate window matrices. */
2413 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2415 #ifdef HAVE_X_WINDOWS
2416 /* Allocate/ reallocate matrices of the dummy window used to display
2417 the menu bar under X when no X toolkit support is available. */
2418 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2420 /* Allocate a dummy window if not already done. */
2421 if (NILP (f
->menu_bar_window
))
2423 f
->menu_bar_window
= make_window ();
2424 w
= XWINDOW (f
->menu_bar_window
);
2425 XSETFRAME (w
->frame
, f
);
2426 w
->pseudo_window_p
= 1;
2429 w
= XWINDOW (f
->menu_bar_window
);
2431 /* Set window dimensions to frame dimensions and allocate or
2432 adjust glyph matrices of W. */
2433 XSETFASTINT (w
->top_line
, 0);
2434 XSETFASTINT (w
->left_col
, 0);
2435 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2436 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2437 allocate_matrices_for_window_redisplay (w
);
2439 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2440 #endif /* HAVE_X_WINDOWS */
2443 /* Allocate/ reallocate matrices of the tool bar window. If we
2444 don't have a tool bar window yet, make one. */
2445 if (NILP (f
->tool_bar_window
))
2447 f
->tool_bar_window
= make_window ();
2448 w
= XWINDOW (f
->tool_bar_window
);
2449 XSETFRAME (w
->frame
, f
);
2450 w
->pseudo_window_p
= 1;
2453 w
= XWINDOW (f
->tool_bar_window
);
2455 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2456 XSETFASTINT (w
->left_col
, 0);
2457 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2458 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2459 allocate_matrices_for_window_redisplay (w
);
2464 /* Adjust/ allocate message buffer of frame F.
2466 Note that the message buffer is never freed. Since I could not
2467 find a free in 19.34, I assume that freeing it would be
2468 problematic in some way and don't do it either.
2470 (Implementation note: It should be checked if we can free it
2471 eventually without causing trouble). */
2474 adjust_frame_message_buffer (f
)
2477 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2479 if (FRAME_MESSAGE_BUF (f
))
2481 char *buffer
= FRAME_MESSAGE_BUF (f
);
2482 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2483 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2486 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2490 /* Re-allocate buffer for decode_mode_spec on frame F. */
2493 adjust_decode_mode_spec_buffer (f
)
2496 f
->decode_mode_spec_buffer
2497 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2498 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2503 /**********************************************************************
2504 Freeing Glyph Matrices
2505 **********************************************************************/
2507 /* Free glyph memory for a frame F. F may be null. This function can
2508 be called for the same frame more than once. The root window of
2509 F may be nil when this function is called. This is the case when
2510 the function is called when F is destroyed. */
2516 if (f
&& f
->glyphs_initialized_p
)
2518 /* Block interrupt input so that we don't get surprised by an X
2519 event while we're in an inconsistent state. */
2521 f
->glyphs_initialized_p
= 0;
2523 /* Release window sub-matrices. */
2524 if (!NILP (f
->root_window
))
2525 free_window_matrices (XWINDOW (f
->root_window
));
2527 /* Free the dummy window for menu bars without X toolkit and its
2529 if (!NILP (f
->menu_bar_window
))
2531 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2532 free_glyph_matrix (w
->desired_matrix
);
2533 free_glyph_matrix (w
->current_matrix
);
2534 w
->desired_matrix
= w
->current_matrix
= NULL
;
2535 f
->menu_bar_window
= Qnil
;
2538 /* Free the tool bar window and its glyph matrices. */
2539 if (!NILP (f
->tool_bar_window
))
2541 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2542 free_glyph_matrix (w
->desired_matrix
);
2543 free_glyph_matrix (w
->current_matrix
);
2544 w
->desired_matrix
= w
->current_matrix
= NULL
;
2545 f
->tool_bar_window
= Qnil
;
2548 /* Release frame glyph matrices. Reset fields to zero in
2549 case we are called a second time. */
2550 if (f
->desired_matrix
)
2552 free_glyph_matrix (f
->desired_matrix
);
2553 free_glyph_matrix (f
->current_matrix
);
2554 f
->desired_matrix
= f
->current_matrix
= NULL
;
2557 /* Release glyph pools. */
2558 if (f
->desired_pool
)
2560 free_glyph_pool (f
->desired_pool
);
2561 free_glyph_pool (f
->current_pool
);
2562 f
->desired_pool
= f
->current_pool
= NULL
;
2570 /* Free glyph sub-matrices in the window tree rooted at W. This
2571 function may be called with a null pointer, and it may be called on
2572 the same tree more than once. */
2575 free_window_matrices (w
)
2580 if (!NILP (w
->hchild
))
2581 free_window_matrices (XWINDOW (w
->hchild
));
2582 else if (!NILP (w
->vchild
))
2583 free_window_matrices (XWINDOW (w
->vchild
));
2586 /* This is a leaf window. Free its memory and reset fields
2587 to zero in case this function is called a second time for
2589 free_glyph_matrix (w
->current_matrix
);
2590 free_glyph_matrix (w
->desired_matrix
);
2591 w
->current_matrix
= w
->desired_matrix
= NULL
;
2594 /* Next window on same level. */
2595 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2600 /* Check glyph memory leaks. This function is called from
2601 shut_down_emacs. Note that frames are not destroyed when Emacs
2602 exits. We therefore free all glyph memory for all active frames
2603 explicitly and check that nothing is left allocated. */
2606 check_glyph_memory ()
2608 Lisp_Object tail
, frame
;
2610 /* Free glyph memory for all frames. */
2611 FOR_EACH_FRAME (tail
, frame
)
2612 free_glyphs (XFRAME (frame
));
2614 /* Check that nothing is left allocated. */
2615 if (glyph_matrix_count
)
2617 if (glyph_pool_count
)
2623 /**********************************************************************
2624 Building a Frame Matrix
2625 **********************************************************************/
2627 /* Most of the redisplay code works on glyph matrices attached to
2628 windows. This is a good solution most of the time, but it is not
2629 suitable for terminal code. Terminal output functions cannot rely
2630 on being able to set an arbitrary terminal window. Instead they
2631 must be provided with a view of the whole frame, i.e. the whole
2632 screen. We build such a view by constructing a frame matrix from
2633 window matrices in this section.
2635 Windows that must be updated have their must_be_update_p flag set.
2636 For all such windows, their desired matrix is made part of the
2637 desired frame matrix. For other windows, their current matrix is
2638 made part of the desired frame matrix.
2640 +-----------------+----------------+
2641 | desired | desired |
2643 +-----------------+----------------+
2646 +----------------------------------+
2648 Desired window matrices can be made part of the frame matrix in a
2649 cheap way: We exploit the fact that the desired frame matrix and
2650 desired window matrices share their glyph memory. This is not
2651 possible for current window matrices. Their glyphs are copied to
2652 the desired frame matrix. The latter is equivalent to
2653 preserve_other_columns in the old redisplay.
2655 Used glyphs counters for frame matrix rows are the result of adding
2656 up glyph lengths of the window matrices. A line in the frame
2657 matrix is enabled, if a corresponding line in a window matrix is
2660 After building the desired frame matrix, it will be passed to
2661 terminal code, which will manipulate both the desired and current
2662 frame matrix. Changes applied to the frame's current matrix have
2663 to be visible in current window matrices afterwards, of course.
2665 This problem is solved like this:
2667 1. Window and frame matrices share glyphs. Window matrices are
2668 constructed in a way that their glyph contents ARE the glyph
2669 contents needed in a frame matrix. Thus, any modification of
2670 glyphs done in terminal code will be reflected in window matrices
2673 2. Exchanges of rows in a frame matrix done by terminal code are
2674 intercepted by hook functions so that corresponding row operations
2675 on window matrices can be performed. This is necessary because we
2676 use pointers to glyphs in glyph row structures. To satisfy the
2677 assumption of point 1 above that glyphs are updated implicitly in
2678 window matrices when they are manipulated via the frame matrix,
2679 window and frame matrix must of course agree where to find the
2680 glyphs for their rows. Possible manipulations that must be
2681 mirrored are assignments of rows of the desired frame matrix to the
2682 current frame matrix and scrolling the current frame matrix. */
2684 /* Build frame F's desired matrix from window matrices. Only windows
2685 which have the flag must_be_updated_p set have to be updated. Menu
2686 bar lines of a frame are not covered by window matrices, so make
2687 sure not to touch them in this function. */
2690 build_frame_matrix (f
)
2695 /* F must have a frame matrix when this function is called. */
2696 xassert (!FRAME_WINDOW_P (f
));
2698 /* Clear all rows in the frame matrix covered by window matrices.
2699 Menu bar lines are not covered by windows. */
2700 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2701 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2703 /* Build the matrix by walking the window tree. */
2704 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2705 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2709 /* Walk a window tree, building a frame matrix MATRIX from window
2710 matrices. W is the root of a window tree. */
2713 build_frame_matrix_from_window_tree (matrix
, w
)
2714 struct glyph_matrix
*matrix
;
2719 if (!NILP (w
->hchild
))
2720 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2721 else if (!NILP (w
->vchild
))
2722 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2724 build_frame_matrix_from_leaf_window (matrix
, w
);
2726 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2731 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2732 desired frame matrix built. W is a leaf window whose desired or
2733 current matrix is to be added to FRAME_MATRIX. W's flag
2734 must_be_updated_p determines which matrix it contributes to
2735 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2736 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2737 Adding a desired matrix means setting up used counters and such in
2738 frame rows, while adding a current window matrix to FRAME_MATRIX
2739 means copying glyphs. The latter case corresponds to
2740 preserve_other_columns in the old redisplay. */
2743 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2744 struct glyph_matrix
*frame_matrix
;
2747 struct glyph_matrix
*window_matrix
;
2748 int window_y
, frame_y
;
2749 /* If non-zero, a glyph to insert at the right border of W. */
2750 GLYPH right_border_glyph
;
2752 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2754 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2755 if (w
->must_be_updated_p
)
2757 window_matrix
= w
->desired_matrix
;
2759 /* Decide whether we want to add a vertical border glyph. */
2760 if (!WINDOW_RIGHTMOST_P (w
))
2762 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2765 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2767 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2768 && GLYPH_CODE_CHAR_VALID_P (gc
))
2770 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2771 spec_glyph_lookup_face (w
, &right_border_glyph
);
2774 if (GLYPH_FACE (right_border_glyph
) <= 0)
2775 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2779 window_matrix
= w
->current_matrix
;
2781 /* For all rows in the window matrix and corresponding rows in the
2784 frame_y
= window_matrix
->matrix_y
;
2785 while (window_y
< window_matrix
->nrows
)
2787 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2788 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2789 int current_row_p
= window_matrix
== w
->current_matrix
;
2791 /* Fill up the frame row with spaces up to the left margin of the
2793 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2795 /* Fill up areas in the window matrix row with spaces. */
2796 fill_up_glyph_row_with_spaces (window_row
);
2798 /* If only part of W's desired matrix has been built, and
2799 window_row wasn't displayed, use the corresponding current
2801 if (window_matrix
== w
->desired_matrix
2802 && !window_row
->enabled_p
)
2804 window_row
= w
->current_matrix
->rows
+ window_y
;
2810 /* Copy window row to frame row. */
2811 bcopy (window_row
->glyphs
[0],
2812 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2813 window_matrix
->matrix_w
* sizeof (struct glyph
));
2817 xassert (window_row
->enabled_p
);
2819 /* Only when a desired row has been displayed, we want
2820 the corresponding frame row to be updated. */
2821 frame_row
->enabled_p
= 1;
2823 /* Maybe insert a vertical border between horizontally adjacent
2825 if (GLYPH_CHAR (right_border_glyph
) != 0)
2827 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2828 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2832 /* Window row window_y must be a slice of frame row
2834 xassert (glyph_row_slice_p (window_row
, frame_row
));
2836 /* If rows are in sync, we don't have to copy glyphs because
2837 frame and window share glyphs. */
2839 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2840 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2844 /* Set number of used glyphs in the frame matrix. Since we fill
2845 up with spaces, and visit leaf windows from left to right it
2846 can be done simply. */
2847 frame_row
->used
[TEXT_AREA
]
2848 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2856 /* Given a user-specified glyph, possibly including a Lisp-level face
2857 ID, return a glyph that has a realized face ID.
2858 This is used for glyphs displayed specially and not part of the text;
2859 for instance, vertical separators, truncation markers, etc. */
2862 spec_glyph_lookup_face (w
, glyph
)
2866 int lface_id
= GLYPH_FACE (*glyph
);
2867 /* Convert the glyph's specified face to a realized (cache) face. */
2870 int face_id
= merge_faces (XFRAME (w
->frame
),
2871 Qt
, lface_id
, DEFAULT_FACE_ID
);
2872 SET_GLYPH_FACE (*glyph
, face_id
);
2876 /* Add spaces to a glyph row ROW in a window matrix.
2878 Each row has the form:
2880 +---------+-----------------------------+------------+
2881 | left | text | right |
2882 +---------+-----------------------------+------------+
2884 Left and right marginal areas are optional. This function adds
2885 spaces to areas so that there are no empty holes between areas.
2886 In other words: If the right area is not empty, the text area
2887 is filled up with spaces up to the right area. If the text area
2888 is not empty, the left area is filled up.
2890 To be called for frame-based redisplay, only. */
2893 fill_up_glyph_row_with_spaces (row
)
2894 struct glyph_row
*row
;
2896 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2897 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2898 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2902 /* Fill area AREA of glyph row ROW with spaces. To be called for
2903 frame-based redisplay only. */
2906 fill_up_glyph_row_area_with_spaces (row
, area
)
2907 struct glyph_row
*row
;
2910 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2912 struct glyph
*end
= row
->glyphs
[area
+ 1];
2913 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2916 *text
++ = space_glyph
;
2917 row
->used
[area
] = text
- row
->glyphs
[area
];
2922 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2923 reached. In frame matrices only one area, TEXT_AREA, is used. */
2926 fill_up_frame_row_with_spaces (row
, upto
)
2927 struct glyph_row
*row
;
2930 int i
= row
->used
[TEXT_AREA
];
2931 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2934 glyph
[i
++] = space_glyph
;
2936 row
->used
[TEXT_AREA
] = i
;
2941 /**********************************************************************
2942 Mirroring operations on frame matrices in window matrices
2943 **********************************************************************/
2945 /* Set frame being updated via frame-based redisplay to F. This
2946 function must be called before updates to make explicit that we are
2947 working on frame matrices or not. */
2950 set_frame_matrix_frame (f
)
2953 frame_matrix_frame
= f
;
2957 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2958 DESIRED_MATRIX is the desired matrix corresponding to
2959 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2960 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2961 frame_matrix_frame is non-null, this indicates that the exchange is
2962 done in frame matrices, and that we have to perform analogous
2963 operations in window matrices of frame_matrix_frame. */
2966 make_current (desired_matrix
, current_matrix
, row
)
2967 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2970 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2971 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2972 int mouse_face_p
= current_row
->mouse_face_p
;
2974 /* Do current_row = desired_row. This exchanges glyph pointers
2975 between both rows, and does a structure assignment otherwise. */
2976 assign_row (current_row
, desired_row
);
2978 /* Enable current_row to mark it as valid. */
2979 current_row
->enabled_p
= 1;
2980 current_row
->mouse_face_p
= mouse_face_p
;
2982 /* If we are called on frame matrices, perform analogous operations
2983 for window matrices. */
2984 if (frame_matrix_frame
)
2985 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2989 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2990 W's frame which has been made current (by swapping pointers between
2991 current and desired matrix). Perform analogous operations in the
2992 matrices of leaf windows in the window tree rooted at W. */
2995 mirror_make_current (w
, frame_row
)
3001 if (!NILP (w
->hchild
))
3002 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
3003 else if (!NILP (w
->vchild
))
3004 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3007 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3008 here because the checks performed in debug mode there
3009 will not allow the conversion. */
3010 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3012 /* If FRAME_ROW is within W, assign the desired row to the
3013 current row (exchanging glyph pointers). */
3014 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3016 struct glyph_row
*current_row
3017 = MATRIX_ROW (w
->current_matrix
, row
);
3018 struct glyph_row
*desired_row
3019 = MATRIX_ROW (w
->desired_matrix
, row
);
3021 if (desired_row
->enabled_p
)
3022 assign_row (current_row
, desired_row
);
3024 swap_glyph_pointers (desired_row
, current_row
);
3025 current_row
->enabled_p
= 1;
3029 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3034 /* Perform row dance after scrolling. We are working on the range of
3035 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3036 including) in MATRIX. COPY_FROM is a vector containing, for each
3037 row I in the range 0 <= I < NLINES, the index of the original line
3038 to move to I. This index is relative to the row range, i.e. 0 <=
3039 index < NLINES. RETAINED_P is a vector containing zero for each
3040 row 0 <= I < NLINES which is empty.
3042 This function is called from do_scrolling and do_direct_scrolling. */
3045 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3047 struct glyph_matrix
*matrix
;
3048 int unchanged_at_top
, nlines
;
3052 /* A copy of original rows. */
3053 struct glyph_row
*old_rows
;
3055 /* Rows to assign to. */
3056 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3060 /* Make a copy of the original rows. */
3061 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3062 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3064 /* Assign new rows, maybe clear lines. */
3065 for (i
= 0; i
< nlines
; ++i
)
3067 int enabled_before_p
= new_rows
[i
].enabled_p
;
3069 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3070 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3071 new_rows
[i
] = old_rows
[copy_from
[i
]];
3072 new_rows
[i
].enabled_p
= enabled_before_p
;
3074 /* RETAINED_P is zero for empty lines. */
3075 if (!retained_p
[copy_from
[i
]])
3076 new_rows
[i
].enabled_p
= 0;
3079 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3080 if (frame_matrix_frame
)
3081 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3082 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3086 /* Synchronize glyph pointers in the current matrix of window W with
3087 the current frame matrix. */
3090 sync_window_with_frame_matrix_rows (w
)
3093 struct frame
*f
= XFRAME (w
->frame
);
3094 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3095 int left
, right
, x
, width
;
3097 /* Preconditions: W must be a leaf window on a tty frame. */
3098 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3099 xassert (!FRAME_WINDOW_P (f
));
3101 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3102 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3103 x
= w
->current_matrix
->matrix_x
;
3104 width
= w
->current_matrix
->matrix_w
;
3106 window_row
= w
->current_matrix
->rows
;
3107 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3108 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3110 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3112 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3113 = frame_row
->glyphs
[0] + x
;
3114 window_row
->glyphs
[TEXT_AREA
]
3115 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3116 window_row
->glyphs
[LAST_AREA
]
3117 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3118 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3119 = window_row
->glyphs
[LAST_AREA
] - right
;
3124 /* Return the window in the window tree rooted in W containing frame
3125 row ROW. Value is null if none is found. */
3128 frame_row_to_window (w
, row
)
3132 struct window
*found
= NULL
;
3136 if (!NILP (w
->hchild
))
3137 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3138 else if (!NILP (w
->vchild
))
3139 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3140 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3141 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3144 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3151 /* Perform a line dance in the window tree rooted at W, after
3152 scrolling a frame matrix in mirrored_line_dance.
3154 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3155 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3156 COPY_FROM is a vector containing, for each row I in the range 0 <=
3157 I < NLINES, the index of the original line to move to I. This
3158 index is relative to the row range, i.e. 0 <= index < NLINES.
3159 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3163 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3165 int unchanged_at_top
, nlines
;
3171 if (!NILP (w
->hchild
))
3172 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3173 nlines
, copy_from
, retained_p
);
3174 else if (!NILP (w
->vchild
))
3175 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3176 nlines
, copy_from
, retained_p
);
3179 /* W is a leaf window, and we are working on its current
3181 struct glyph_matrix
*m
= w
->current_matrix
;
3183 struct glyph_row
*old_rows
;
3185 /* Make a copy of the original rows of matrix m. */
3186 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3187 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3189 for (i
= 0; i
< nlines
; ++i
)
3191 /* Frame relative line assigned to. */
3192 int frame_to
= i
+ unchanged_at_top
;
3194 /* Frame relative line assigned. */
3195 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3197 /* Window relative line assigned to. */
3198 int window_to
= frame_to
- m
->matrix_y
;
3200 /* Window relative line assigned. */
3201 int window_from
= frame_from
- m
->matrix_y
;
3203 /* Is assigned line inside window? */
3204 int from_inside_window_p
3205 = window_from
>= 0 && window_from
< m
->matrix_h
;
3207 /* Is assigned to line inside window? */
3208 int to_inside_window_p
3209 = window_to
>= 0 && window_to
< m
->matrix_h
;
3211 if (from_inside_window_p
&& to_inside_window_p
)
3213 /* Enabled setting before assignment. */
3214 int enabled_before_p
;
3216 /* Do the assignment. The enabled_p flag is saved
3217 over the assignment because the old redisplay did
3219 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3220 m
->rows
[window_to
] = old_rows
[window_from
];
3221 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3223 /* If frame line is empty, window line is empty, too. */
3224 if (!retained_p
[copy_from
[i
]])
3225 m
->rows
[window_to
].enabled_p
= 0;
3227 else if (to_inside_window_p
)
3229 /* A copy between windows. This is an infrequent
3230 case not worth optimizing. */
3231 struct frame
*f
= XFRAME (w
->frame
);
3232 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3234 struct glyph_matrix
*m2
;
3237 w2
= frame_row_to_window (root
, frame_from
);
3238 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3239 -nw', FROM_FRAME sometimes has no associated window.
3240 This check avoids a segfault if W2 is null. */
3243 m2
= w2
->current_matrix
;
3244 m2_from
= frame_from
- m2
->matrix_y
;
3245 copy_row_except_pointers (m
->rows
+ window_to
,
3246 m2
->rows
+ m2_from
);
3248 /* If frame line is empty, window line is empty, too. */
3249 if (!retained_p
[copy_from
[i
]])
3250 m
->rows
[window_to
].enabled_p
= 0;
3254 else if (from_inside_window_p
)
3258 /* If there was a copy between windows, make sure glyph
3259 pointers are in sync with the frame matrix. */
3261 sync_window_with_frame_matrix_rows (w
);
3263 /* Check that no pointers are lost. */
3267 /* Next window on same level. */
3268 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3275 /* Check that window and frame matrices agree about their
3276 understanding where glyphs of the rows are to find. For each
3277 window in the window tree rooted at W, check that rows in the
3278 matrices of leaf window agree with their frame matrices about
3282 check_window_matrix_pointers (w
)
3287 if (!NILP (w
->hchild
))
3288 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3289 else if (!NILP (w
->vchild
))
3290 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3293 struct frame
*f
= XFRAME (w
->frame
);
3294 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3295 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3298 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3303 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3304 a window and FRAME_MATRIX is the corresponding frame matrix. For
3305 each row in WINDOW_MATRIX check that it's a slice of the
3306 corresponding frame row. If it isn't, abort. */
3309 check_matrix_pointers (window_matrix
, frame_matrix
)
3310 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3312 /* Row number in WINDOW_MATRIX. */
3315 /* Row number corresponding to I in FRAME_MATRIX. */
3316 int j
= window_matrix
->matrix_y
;
3318 /* For all rows check that the row in the window matrix is a
3319 slice of the row in the frame matrix. If it isn't we didn't
3320 mirror an operation on the frame matrix correctly. */
3321 while (i
< window_matrix
->nrows
)
3323 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3324 frame_matrix
->rows
+ j
))
3330 #endif /* GLYPH_DEBUG != 0 */
3334 /**********************************************************************
3335 VPOS and HPOS translations
3336 **********************************************************************/
3340 /* Translate vertical position VPOS which is relative to window W to a
3341 vertical position relative to W's frame. */
3344 window_to_frame_vpos (w
, vpos
)
3348 struct frame
*f
= XFRAME (w
->frame
);
3350 xassert (!FRAME_WINDOW_P (f
));
3351 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3352 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3353 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3358 /* Translate horizontal position HPOS which is relative to window W to
3359 a horizontal position relative to W's frame. */
3362 window_to_frame_hpos (w
, hpos
)
3366 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3367 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3371 #endif /* GLYPH_DEBUG */
3375 /**********************************************************************
3377 **********************************************************************/
3379 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3380 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3386 CHECK_LIVE_FRAME (frame
);
3389 /* Ignore redraw requests, if frame has no glyphs yet.
3390 (Implementation note: It still has to be checked why we are
3391 called so early here). */
3392 if (!glyphs_initialized_initially_p
)
3397 if (FRAME_MSDOS_P (f
))
3398 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3401 clear_current_matrices (f
);
3403 if (FRAME_TERMCAP_P (f
))
3404 fflush (FRAME_TTY (f
)->output
);
3405 windows_or_buffers_changed
++;
3406 /* Mark all windows as inaccurate, so that every window will have
3407 its redisplay done. */
3408 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3409 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3415 /* Redraw frame F. This is nothing more than a call to the Lisp
3416 function redraw-frame. */
3423 XSETFRAME (frame
, f
);
3424 Fredraw_frame (frame
);
3428 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3429 doc
: /* Clear and redisplay all visible frames. */)
3432 Lisp_Object tail
, frame
;
3434 FOR_EACH_FRAME (tail
, frame
)
3435 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3436 Fredraw_frame (frame
);
3442 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3443 visible frames marked as garbaged. */
3446 redraw_garbaged_frames ()
3448 Lisp_Object tail
, frame
;
3450 FOR_EACH_FRAME (tail
, frame
)
3451 if (FRAME_VISIBLE_P (XFRAME (frame
))
3452 && FRAME_GARBAGED_P (XFRAME (frame
)))
3453 Fredraw_frame (frame
);
3458 /***********************************************************************
3460 ***********************************************************************/
3462 /* Try to update display and current glyph matrix directly.
3464 This function is called after a character G has been inserted into
3465 current_buffer. It tries to update the current glyph matrix and
3466 perform appropriate screen output to reflect the insertion. If it
3467 succeeds, the global flag redisplay_performed_directly_p will be
3468 set to 1, and thereby prevent the more costly general redisplay
3469 from running (see redisplay_internal).
3471 This function is not called for `hairy' character insertions.
3472 In particular, it is not called when after or before change
3473 functions exist, like they are used by font-lock. See keyboard.c
3474 for details where this function is called. */
3477 direct_output_for_insert (g
)
3480 register struct frame
*f
= SELECTED_FRAME ();
3481 struct window
*w
= XWINDOW (selected_window
);
3483 struct glyph_row
*glyph_row
;
3484 struct glyph
*glyphs
, *glyph
, *end
;
3486 /* Non-null means that redisplay of W is based on window matrices. */
3487 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3488 /* Non-null means we are in overwrite mode. */
3489 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3491 struct text_pos pos
;
3492 int delta
, delta_bytes
;
3494 /* Not done directly. */
3495 redisplay_performed_directly_p
= 0;
3497 /* Quickly give up for some common cases. */
3498 if (cursor_in_echo_area
3499 /* Give up if fonts have changed. */
3501 /* Give up if face attributes have been changed. */
3502 || face_change_count
3503 /* Give up if cursor position not really known. */
3504 || !display_completed
3505 /* Give up if buffer appears in two places. */
3506 || buffer_shared
> 1
3507 /* Give up if we need to reorder bidirectional text. */
3508 || !NILP (current_buffer
->bidi_display_reordering
)
3509 /* Give up if currently displaying a message instead of the
3510 minibuffer contents. */
3511 || (EQ (selected_window
, minibuf_window
)
3512 && EQ (minibuf_window
, echo_area_window
))
3513 /* Give up for hscrolled mini-buffer because display of the prompt
3514 is handled specially there (see display_line). */
3515 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3516 /* Give up if overwriting in the middle of a line. */
3519 && FETCH_BYTE (PT
) != '\n')
3520 /* Give up for tabs and line ends. */
3524 || (g
== ' ' && !NILP (current_buffer
->word_wrap
))
3525 /* Give up if unable to display the cursor in the window. */
3526 || w
->cursor
.vpos
< 0
3527 /* Give up if we are showing a message or just cleared the message
3528 because we might need to resize the echo area window. */
3529 || !NILP (echo_area_buffer
[0])
3530 || !NILP (echo_area_buffer
[1])
3531 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3532 /* Can't do it in a continued line because continuation
3533 lines would change. */
3534 (glyph_row
->continued_p
3535 || glyph_row
->exact_window_width_line_p
3536 /* Can't use this method if the line overlaps others or is
3537 overlapped by others because these other lines would
3538 have to be redisplayed. */
3539 || glyph_row
->overlapping_p
3540 || glyph_row
->overlapped_p
))
3541 /* Can't do it for partial width windows on terminal frames
3542 because we can't clear to eol in such a window. */
3543 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3546 /* If we can't insert glyphs, we can use this method only
3547 at the end of a line. */
3548 if (!FRAME_CHAR_INS_DEL_OK (f
))
3549 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3552 /* Set up a display iterator structure for W. Glyphs will be
3553 produced in scratch_glyph_row. Current position is W's cursor
3555 clear_glyph_row (&scratch_glyph_row
);
3556 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3557 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3558 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3561 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3562 if (glyph_row
->mouse_face_p
)
3565 /* Give up if highlighting trailing whitespace and we have trailing
3566 whitespace in glyph_row. We would have to remove the trailing
3567 whitespace face in that case. */
3568 if (!NILP (Vshow_trailing_whitespace
)
3569 && glyph_row
->used
[TEXT_AREA
])
3573 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3574 if (last
->type
== STRETCH_GLYPH
3575 || (last
->type
== CHAR_GLYPH
3576 && last
->u
.ch
== ' '))
3580 /* Give up if there are overlay strings at pos. This would fail
3581 if the overlay string has newlines in it. */
3582 if (STRINGP (it
.string
))
3585 it
.hpos
= w
->cursor
.hpos
;
3586 it
.vpos
= w
->cursor
.vpos
;
3587 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3588 it
.current_y
= w
->cursor
.y
;
3589 it
.end_charpos
= PT
;
3590 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3591 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3593 /* More than one display element may be returned for PT - 1 if
3594 (i) it's a control character which is translated into `\003' or
3595 `^C', or (ii) it has a display table entry, or (iii) it's a
3596 combination of both. */
3597 delta
= delta_bytes
= 0;
3598 while (get_next_display_element (&it
))
3600 PRODUCE_GLYPHS (&it
);
3602 /* Give up if glyph doesn't fit completely on the line. */
3603 if (it
.current_x
>= it
.last_visible_x
)
3606 /* Give up if new glyph has different ascent or descent than
3607 the original row, or if it is not a character glyph. */
3608 if (glyph_row
->ascent
!= it
.ascent
3609 || glyph_row
->height
!= it
.ascent
+ it
.descent
3610 || glyph_row
->phys_ascent
!= it
.phys_ascent
3611 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3612 || it
.what
!= IT_CHARACTER
)
3616 delta_bytes
+= it
.len
;
3617 set_iterator_to_next (&it
, 1);
3620 /* Give up if we hit the right edge of the window. We would have
3621 to insert truncation or continuation glyphs. */
3622 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3623 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3626 /* Give up if there is a \t following in the line. */
3628 it2
.end_charpos
= ZV
;
3629 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3630 while (get_next_display_element (&it2
)
3631 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3635 set_iterator_to_next (&it2
, 1);
3638 /* Number of new glyphs produced. */
3639 n
= it
.glyph_row
->used
[TEXT_AREA
];
3641 /* Start and end of glyphs in original row. */
3642 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3643 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3645 /* Make room for new glyphs, then insert them. */
3646 xassert (end
- glyphs
- n
>= 0);
3647 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3648 (end
- glyphs
- n
) * sizeof (*end
));
3649 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3650 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3651 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3653 /* Compute new line width. */
3654 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3655 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3656 glyph_row
->pixel_width
= glyph_row
->x
;
3659 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3663 /* Increment buffer positions for glyphs following the newly
3665 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3666 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3667 glyph
->charpos
+= delta
;
3669 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3671 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3672 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3675 /* Adjust positions in lines following the one we are in. */
3676 increment_matrix_positions (w
->current_matrix
,
3678 w
->current_matrix
->nrows
,
3679 delta
, delta_bytes
);
3681 glyph_row
->contains_overlapping_glyphs_p
3682 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3684 glyph_row
->displays_text_p
= 1;
3685 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3686 XFASTINT (w
->window_end_vpos
)));
3688 if (!NILP (Vshow_trailing_whitespace
))
3689 highlight_trailing_whitespace (it
.f
, glyph_row
);
3691 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3692 In the middle, we have to insert glyphs. Note that this is now
3693 implemented for X frames. The implementation uses updated_window
3695 updated_row
= glyph_row
;
3696 updated_area
= TEXT_AREA
;
3700 FRAME_RIF (f
)->update_window_begin_hook (w
);
3702 if (glyphs
== end
- n
3703 /* In front of a space added by append_space. */
3704 || (glyphs
== end
- n
- 1
3705 && (end
- n
)->charpos
<= 0))
3706 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3708 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3712 if (glyphs
== end
- n
)
3713 write_glyphs (f
, glyphs
, n
);
3715 insert_glyphs (f
, glyphs
, n
);
3718 w
->cursor
.hpos
+= n
;
3719 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3720 xassert (w
->cursor
.hpos
>= 0
3721 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3723 /* How to set the cursor differs depending on whether we are
3724 using a frame matrix or a window matrix. Note that when
3725 a frame matrix is used, cursor_to expects frame coordinates,
3726 and the X and Y parameters are not used. */
3727 if (window_redisplay_p
)
3728 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3729 w
->cursor
.y
, w
->cursor
.x
);
3733 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3734 + (INTEGERP (w
->left_margin_cols
)
3735 ? XFASTINT (w
->left_margin_cols
)
3737 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3738 cursor_to (f
, y
, x
);
3741 #ifdef HAVE_WINDOW_SYSTEM
3742 update_window_fringes (w
, 0);
3746 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3749 if (FRAME_TERMCAP_P (f
))
3750 fflush (FRAME_TTY (f
)->output
);
3752 TRACE ((stderr
, "direct output for insert\n"));
3753 mark_window_display_accurate (it
.window
, 1);
3754 redisplay_performed_directly_p
= 1;
3759 /* Perform a direct display update for moving PT by N positions
3760 left or right. N < 0 means a movement backwards. This function
3761 is currently only called for N == 1 or N == -1. */
3764 direct_output_forward_char (n
)
3767 struct frame
*f
= SELECTED_FRAME ();
3768 struct window
*w
= XWINDOW (selected_window
);
3769 struct glyph_row
*row
;
3771 /* Give up if point moved out of or into a composition. */
3772 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3773 current_buffer
, PT
))
3776 /* Give up if face attributes have been changed. */
3777 if (face_change_count
)
3780 /* Give up if current matrix is not up to date or we are
3781 displaying a message. */
3782 if (!display_completed
|| cursor_in_echo_area
)
3785 /* Give up if we need to reorder bidirectional text. */
3786 if (!NILP (XBUFFER (w
->buffer
)->bidi_display_reordering
))
3789 /* Give up if the buffer's direction is reversed. */
3790 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3793 /* Can't use direct output if highlighting a region. */
3794 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3797 /* Can't use direct output if highlighting trailing whitespace. */
3798 if (!NILP (Vshow_trailing_whitespace
))
3801 /* Give up if we are showing a message or just cleared the message
3802 because we might need to resize the echo area window. */
3803 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3806 /* Give up if currently displaying a message instead of the
3807 minibuffer contents. */
3808 if (XWINDOW (minibuf_window
) == w
3809 && EQ (minibuf_window
, echo_area_window
))
3812 /* Give up if we don't know where the cursor is. */
3813 if (w
->cursor
.vpos
< 0)
3816 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3818 /* Give up if PT is outside of the last known cursor row. */
3819 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3820 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3823 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3825 w
->last_cursor
= w
->cursor
;
3826 XSETFASTINT (w
->last_point
, PT
);
3828 xassert (w
->cursor
.hpos
>= 0
3829 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3831 if (FRAME_WINDOW_P (f
))
3832 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3833 w
->cursor
.y
, w
->cursor
.x
);
3837 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3838 + (INTEGERP (w
->left_margin_cols
)
3839 ? XFASTINT (w
->left_margin_cols
)
3841 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3842 cursor_to (f
, y
, x
);
3845 if (FRAME_TERMCAP_P (f
))
3846 fflush (FRAME_TTY (f
)->output
);
3847 redisplay_performed_directly_p
= 1;
3853 /***********************************************************************
3855 ***********************************************************************/
3857 /* Update frame F based on the data in desired matrices.
3859 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3860 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3863 Value is non-zero if redisplay was stopped due to pending input. */
3866 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3869 int inhibit_hairy_id_p
;
3871 /* 1 means display has been paused because of pending input. */
3873 struct window
*root_window
= XWINDOW (f
->root_window
);
3875 if (redisplay_dont_pause
)
3877 #if PERIODIC_PREEMPTION_CHECKING
3878 else if (NILP (Vredisplay_preemption_period
))
3880 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3883 double p
= XFLOATINT (Vredisplay_preemption_period
);
3886 if (detect_input_pending_ignore_squeezables ())
3893 usec
= (p
- sec
) * 1000000;
3895 EMACS_GET_TIME (tm
);
3896 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3897 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3901 if (FRAME_WINDOW_P (f
))
3903 /* We are working on window matrix basis. All windows whose
3904 flag must_be_updated_p is set have to be updated. */
3906 /* Record that we are not working on frame matrices. */
3907 set_frame_matrix_frame (NULL
);
3909 /* Update all windows in the window tree of F, maybe stopping
3910 when pending input is detected. */
3913 /* Update the menu bar on X frames that don't have toolkit
3915 if (WINDOWP (f
->menu_bar_window
))
3916 update_window (XWINDOW (f
->menu_bar_window
), 1);
3918 /* Update the tool-bar window, if present. */
3919 if (WINDOWP (f
->tool_bar_window
))
3921 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3923 /* Update tool-bar window. */
3924 if (w
->must_be_updated_p
)
3928 update_window (w
, 1);
3929 w
->must_be_updated_p
= 0;
3931 /* Swap tool-bar strings. We swap because we want to
3933 tem
= f
->current_tool_bar_string
;
3934 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3935 f
->desired_tool_bar_string
= tem
;
3940 /* Update windows. */
3941 paused_p
= update_window_tree (root_window
, force_p
);
3944 /* This flush is a performance bottleneck under X,
3945 and it doesn't seem to be necessary anyway (in general).
3946 It is necessary when resizing the window with the mouse, or
3947 at least the fringes are not redrawn in a timely manner. ++kfs */
3948 if (f
->force_flush_display_p
)
3950 FRAME_RIF (f
)->flush_display (f
);
3951 f
->force_flush_display_p
= 0;
3956 /* We are working on frame matrix basis. Set the frame on whose
3957 frame matrix we operate. */
3958 set_frame_matrix_frame (f
);
3960 /* Build F's desired matrix from window matrices. */
3961 build_frame_matrix (f
);
3963 /* Update the display */
3965 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3968 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3970 if (FRAME_TTY (f
)->termscript
)
3971 fflush (FRAME_TTY (f
)->termscript
);
3972 if (FRAME_TERMCAP_P (f
))
3973 fflush (FRAME_TTY (f
)->output
);
3976 /* Check window matrices for lost pointers. */
3978 check_window_matrix_pointers (root_window
);
3979 add_frame_display_history (f
, paused_p
);
3984 /* Reset flags indicating that a window should be updated. */
3985 set_window_update_flags (root_window
, 0);
3987 display_completed
= !paused_p
;
3993 /************************************************************************
3994 Window-based updates
3995 ************************************************************************/
3997 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3998 don't stop updating when input is pending. */
4001 update_window_tree (w
, force_p
)
4007 while (w
&& !paused_p
)
4009 if (!NILP (w
->hchild
))
4010 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
4011 else if (!NILP (w
->vchild
))
4012 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
4013 else if (w
->must_be_updated_p
)
4014 paused_p
|= update_window (w
, force_p
);
4016 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4023 /* Update window W if its flag must_be_updated_p is non-zero. If
4024 FORCE_P is non-zero, don't stop updating if input is pending. */
4027 update_single_window (w
, force_p
)
4031 if (w
->must_be_updated_p
)
4033 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4035 /* Record that this is not a frame-based redisplay. */
4036 set_frame_matrix_frame (NULL
);
4038 if (redisplay_dont_pause
)
4040 #if PERIODIC_PREEMPTION_CHECKING
4041 else if (NILP (Vredisplay_preemption_period
))
4043 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4046 double p
= XFLOATINT (Vredisplay_preemption_period
);
4050 usec
= (p
- sec
) * 1000000;
4052 EMACS_GET_TIME (tm
);
4053 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4054 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4060 update_window (w
, force_p
);
4063 /* Reset flag in W. */
4064 w
->must_be_updated_p
= 0;
4068 #ifdef HAVE_WINDOW_SYSTEM
4070 /* Redraw lines from the current matrix of window W that are
4071 overlapped by other rows. YB is bottom-most y-position in W. */
4074 redraw_overlapped_rows (w
, yb
)
4079 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4081 /* If rows overlapping others have been changed, the rows being
4082 overlapped have to be redrawn. This won't draw lines that have
4083 already been drawn in update_window_line because overlapped_p in
4084 desired rows is 0, so after row assignment overlapped_p in
4085 current rows is 0. */
4086 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4088 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4090 if (!row
->enabled_p
)
4092 else if (row
->mode_line_p
)
4095 if (row
->overlapped_p
)
4097 enum glyph_row_area area
;
4099 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4102 updated_area
= area
;
4103 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
4104 area
== TEXT_AREA
? row
->x
: 0);
4105 if (row
->used
[area
])
4106 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4108 FRAME_RIF (f
)->clear_end_of_line (-1);
4111 row
->overlapped_p
= 0;
4114 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4120 /* Redraw lines from the current matrix of window W that overlap
4121 others. YB is bottom-most y-position in W. */
4124 redraw_overlapping_rows (w
, yb
)
4129 struct glyph_row
*row
;
4130 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4132 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4134 row
= w
->current_matrix
->rows
+ i
;
4136 if (!row
->enabled_p
)
4138 else if (row
->mode_line_p
)
4141 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4143 if (row
->overlapping_p
)
4147 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
4148 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4149 overlaps
|= OVERLAPS_PRED
;
4150 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
4151 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4152 overlaps
|= OVERLAPS_SUCC
;
4156 if (row
->used
[LEFT_MARGIN_AREA
])
4157 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4159 if (row
->used
[TEXT_AREA
])
4160 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4162 if (row
->used
[RIGHT_MARGIN_AREA
])
4163 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4165 /* Record in neighbour rows that ROW overwrites part of
4167 if (overlaps
& OVERLAPS_PRED
)
4168 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4169 if (overlaps
& OVERLAPS_SUCC
)
4170 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4179 #endif /* HAVE_WINDOW_SYSTEM */
4184 /* Check that no row in the current matrix of window W is enabled
4185 which is below what's displayed in the window. */
4188 check_current_matrix_flags (w
)
4191 int last_seen_p
= 0;
4192 int i
, yb
= window_text_bottom_y (w
);
4194 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4196 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4197 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4199 else if (last_seen_p
&& row
->enabled_p
)
4204 #endif /* GLYPH_DEBUG */
4207 /* Update display of window W. FORCE_P non-zero means that we should
4208 not stop when detecting pending input. */
4211 update_window (w
, force_p
)
4215 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4217 #if !PERIODIC_PREEMPTION_CHECKING
4218 int preempt_count
= baud_rate
/ 2400 + 1;
4220 extern int input_pending
;
4221 extern Lisp_Object do_mouse_tracking
;
4222 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4224 /* Check that W's frame doesn't have glyph matrices. */
4225 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4228 /* Check pending input the first time so that we can quickly return. */
4229 #if !PERIODIC_PREEMPTION_CHECKING
4231 detect_input_pending_ignore_squeezables ();
4234 /* If forced to complete the update, or if no input is pending, do
4236 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4238 struct glyph_row
*row
, *end
;
4239 struct glyph_row
*mode_line_row
;
4240 struct glyph_row
*header_line_row
;
4241 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4243 rif
->update_window_begin_hook (w
);
4244 yb
= window_text_bottom_y (w
);
4246 /* If window has a header line, update it before everything else.
4247 Adjust y-positions of other rows by the header line height. */
4248 row
= desired_matrix
->rows
;
4249 end
= row
+ desired_matrix
->nrows
- 1;
4251 if (row
->mode_line_p
)
4253 header_line_row
= row
;
4257 header_line_row
= NULL
;
4259 /* Update the mode line, if necessary. */
4260 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4261 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4263 mode_line_row
->y
= yb
;
4264 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4266 &mouse_face_overwritten_p
);
4269 /* Find first enabled row. Optimizations in redisplay_internal
4270 may lead to an update with only one row enabled. There may
4271 be also completely empty matrices. */
4272 while (row
< end
&& !row
->enabled_p
)
4275 /* Try reusing part of the display by copying. */
4276 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4278 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4281 /* All rows were found to be equal. */
4287 /* We've scrolled the display. */
4293 /* Update the rest of the lines. */
4294 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4297 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4300 /* We'll have to play a little bit with when to
4301 detect_input_pending. If it's done too often,
4302 scrolling large windows with repeated scroll-up
4303 commands will too quickly pause redisplay. */
4304 #if PERIODIC_PREEMPTION_CHECKING
4308 EMACS_GET_TIME (tm
);
4309 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4310 if (EMACS_TIME_NEG_P (dif
))
4312 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4313 if (detect_input_pending_ignore_squeezables ())
4318 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4319 detect_input_pending_ignore_squeezables ();
4321 changed_p
|= update_window_line (w
, vpos
,
4322 &mouse_face_overwritten_p
);
4324 /* Mark all rows below the last visible one in the current
4325 matrix as invalid. This is necessary because of
4326 variable line heights. Consider the case of three
4327 successive redisplays, where the first displays 5
4328 lines, the second 3 lines, and the third 5 lines again.
4329 If the second redisplay wouldn't mark rows in the
4330 current matrix invalid, the third redisplay might be
4331 tempted to optimize redisplay based on lines displayed
4332 in the first redisplay. */
4333 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4334 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4335 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4338 /* Was display preempted? */
4339 paused_p
= row
< end
;
4343 /* Update the header line after scrolling because a new header
4344 line would otherwise overwrite lines at the top of the window
4345 that can be scrolled. */
4346 if (header_line_row
&& header_line_row
->enabled_p
)
4348 header_line_row
->y
= 0;
4349 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4352 /* Fix the appearance of overlapping/overlapped rows. */
4353 if (!paused_p
&& !w
->pseudo_window_p
)
4355 #ifdef HAVE_WINDOW_SYSTEM
4356 if (changed_p
&& rif
->fix_overlapping_area
)
4358 redraw_overlapped_rows (w
, yb
);
4359 redraw_overlapping_rows (w
, yb
);
4363 /* Make cursor visible at cursor position of W. */
4364 set_window_cursor_after_update (w
);
4366 #if 0 /* Check that current matrix invariants are satisfied. This is
4367 for debugging only. See the comment of check_matrix_invariants. */
4368 IF_DEBUG (check_matrix_invariants (w
));
4373 /* Remember the redisplay method used to display the matrix. */
4374 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4377 #ifdef HAVE_WINDOW_SYSTEM
4378 update_window_fringes (w
, 0);
4381 /* End the update of window W. Don't set the cursor if we
4382 paused updating the display because in this case,
4383 set_window_cursor_after_update hasn't been called, and
4384 output_cursor doesn't contain the cursor location. */
4385 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4391 /* check_current_matrix_flags (w); */
4392 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4395 clear_glyph_matrix (desired_matrix
);
4401 /* Update the display of area AREA in window W, row number VPOS.
4402 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4405 update_marginal_area (w
, area
, vpos
)
4409 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4410 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4412 /* Let functions in xterm.c know what area subsequent X positions
4413 will be relative to. */
4414 updated_area
= area
;
4416 /* Set cursor to start of glyphs, write them, and clear to the end
4417 of the area. I don't think that something more sophisticated is
4418 necessary here, since marginal areas will not be the default. */
4419 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4420 if (desired_row
->used
[area
])
4421 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4422 rif
->clear_end_of_line (-1);
4426 /* Update the display of the text area of row VPOS in window W.
4427 Value is non-zero if display has changed. */
4430 update_text_area (w
, vpos
)
4434 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4435 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4436 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4439 /* Let functions in xterm.c know what area subsequent X positions
4440 will be relative to. */
4441 updated_area
= TEXT_AREA
;
4443 /* If rows are at different X or Y, or rows have different height,
4444 or the current row is marked invalid, write the entire line. */
4445 if (!current_row
->enabled_p
4446 || desired_row
->y
!= current_row
->y
4447 || desired_row
->ascent
!= current_row
->ascent
4448 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4449 || desired_row
->phys_height
!= current_row
->phys_height
4450 || desired_row
->visible_height
!= current_row
->visible_height
4451 || current_row
->overlapped_p
4452 /* This next line is necessary for correctly redrawing
4453 mouse-face areas after scrolling and other operations.
4454 However, it causes excessive flickering when mouse is moved
4455 across the mode line. Luckily, turning it off for the mode
4456 line doesn't seem to hurt anything. -- cyd.
4457 But it is still needed for the header line. -- kfs. */
4458 || (current_row
->mouse_face_p
4459 && !(current_row
->mode_line_p
&& vpos
> 0))
4460 || current_row
->x
!= desired_row
->x
)
4462 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4464 if (desired_row
->used
[TEXT_AREA
])
4465 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4466 desired_row
->used
[TEXT_AREA
]);
4468 /* Clear to end of window. */
4469 rif
->clear_end_of_line (-1);
4472 /* This erases the cursor. We do this here because
4473 notice_overwritten_cursor cannot easily check this, which
4474 might indicate that the whole functionality of
4475 notice_overwritten_cursor would better be implemented here.
4476 On the other hand, we need notice_overwritten_cursor as long
4477 as mouse highlighting is done asynchronously outside of
4479 if (vpos
== w
->phys_cursor
.vpos
)
4480 w
->phys_cursor_on_p
= 0;
4485 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4486 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4487 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4488 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4489 int abort_skipping
= 0;
4491 /* If the desired row extends its face to the text area end, and
4492 unless the current row also does so at the same position,
4493 make sure we write at least one glyph, so that the face
4494 extension actually takes place. */
4495 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4496 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4497 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4498 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4501 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4505 /* Loop over glyphs that current and desired row may have
4509 int can_skip_p
= !abort_skipping
;
4511 /* Skip over glyphs that both rows have in common. These
4512 don't have to be written. We can't skip if the last
4513 current glyph overlaps the glyph to its right. For
4514 example, consider a current row of `if ' with the `f' in
4515 Courier bold so that it overlaps the ` ' to its right.
4516 If the desired row is ` ', we would skip over the space
4517 after the `if' and there would remain a pixel from the
4518 `f' on the screen. */
4519 if (overlapping_glyphs_p
&& i
> 0)
4521 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4524 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4526 can_skip_p
= (right
== 0 && !abort_skipping
);
4534 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4536 x
+= desired_glyph
->pixel_width
;
4537 ++desired_glyph
, ++current_glyph
, ++i
;
4540 /* Consider the case that the current row contains "xxx
4541 ppp ggg" in italic Courier font, and the desired row
4542 is "xxx ggg". The character `p' has lbearing, `g'
4543 has not. The loop above will stop in front of the
4544 first `p' in the current row. If we would start
4545 writing glyphs there, we wouldn't erase the lbearing
4546 of the `p'. The rest of the lbearing problem is then
4547 taken care of by draw_glyphs. */
4548 if (overlapping_glyphs_p
4550 && i
< current_row
->used
[TEXT_AREA
]
4551 && (current_row
->used
[TEXT_AREA
]
4552 != desired_row
->used
[TEXT_AREA
]))
4556 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4558 while (left
> 0 && i
> 0)
4560 --i
, --desired_glyph
, --current_glyph
;
4561 x
-= desired_glyph
->pixel_width
;
4562 left
-= desired_glyph
->pixel_width
;
4565 /* Abort the skipping algorithm if we end up before
4566 our starting point, to avoid looping (bug#1070).
4567 This can happen when the lbearing is larger than
4569 abort_skipping
= (i
< start_hpos
);
4573 /* Try to avoid writing the entire rest of the desired row
4574 by looking for a resync point. This mainly prevents
4575 mode line flickering in the case the mode line is in
4576 fixed-pitch font, which it usually will be. */
4577 if (i
< desired_row
->used
[TEXT_AREA
])
4579 int start_x
= x
, start_hpos
= i
;
4580 struct glyph
*start
= desired_glyph
;
4582 int skip_first_p
= !can_skip_p
;
4584 /* Find the next glyph that's equal again. */
4587 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4590 x
+= desired_glyph
->pixel_width
;
4591 current_x
+= current_glyph
->pixel_width
;
4592 ++desired_glyph
, ++current_glyph
, ++i
;
4596 if (i
== start_hpos
|| x
!= current_x
)
4600 desired_glyph
= start
;
4604 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4605 rif
->write_glyphs (start
, i
- start_hpos
);
4610 /* Write the rest. */
4611 if (i
< desired_row
->used
[TEXT_AREA
])
4613 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4614 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4618 /* Maybe clear to end of line. */
4619 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4621 /* If new row extends to the end of the text area, nothing
4622 has to be cleared, if and only if we did a write_glyphs
4623 above. This is made sure by setting desired_stop_pos
4624 appropriately above. */
4625 xassert (i
< desired_row
->used
[TEXT_AREA
]
4626 || ((desired_row
->used
[TEXT_AREA
]
4627 == current_row
->used
[TEXT_AREA
])
4628 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4630 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4632 /* If old row extends to the end of the text area, clear. */
4633 if (i
>= desired_row
->used
[TEXT_AREA
])
4634 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4635 desired_row
->pixel_width
);
4636 rif
->clear_end_of_line (-1);
4639 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4641 /* Otherwise clear to the end of the old row. Everything
4642 after that position should be clear already. */
4645 if (i
>= desired_row
->used
[TEXT_AREA
])
4646 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4647 desired_row
->pixel_width
);
4649 /* If cursor is displayed at the end of the line, make sure
4650 it's cleared. Nowadays we don't have a phys_cursor_glyph
4651 with which to erase the cursor (because this method
4652 doesn't work with lbearing/rbearing), so we must do it
4654 if (vpos
== w
->phys_cursor
.vpos
4655 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4657 w
->phys_cursor_on_p
= 0;
4661 x
= current_row
->pixel_width
;
4662 rif
->clear_end_of_line (x
);
4671 /* Update row VPOS in window W. Value is non-zero if display has been
4675 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4677 int vpos
, *mouse_face_overwritten_p
;
4679 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4680 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4681 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4684 /* Set the row being updated. This is important to let xterm.c
4685 know what line height values are in effect. */
4686 updated_row
= desired_row
;
4688 /* A row can be completely invisible in case a desired matrix was
4689 built with a vscroll and then make_cursor_line_fully_visible shifts
4690 the matrix. Make sure to make such rows current anyway, since
4691 we need the correct y-position, for example, in the current matrix. */
4692 if (desired_row
->mode_line_p
4693 || desired_row
->visible_height
> 0)
4695 xassert (desired_row
->enabled_p
);
4697 /* Update display of the left margin area, if there is one. */
4698 if (!desired_row
->full_width_p
4699 && !NILP (w
->left_margin_cols
))
4702 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4705 /* Update the display of the text area. */
4706 if (update_text_area (w
, vpos
))
4709 if (current_row
->mouse_face_p
)
4710 *mouse_face_overwritten_p
= 1;
4713 /* Update display of the right margin area, if there is one. */
4714 if (!desired_row
->full_width_p
4715 && !NILP (w
->right_margin_cols
))
4718 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4721 /* Draw truncation marks etc. */
4722 if (!current_row
->enabled_p
4723 || desired_row
->y
!= current_row
->y
4724 || desired_row
->visible_height
!= current_row
->visible_height
4725 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4726 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4727 || current_row
->redraw_fringe_bitmaps_p
4728 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4729 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4730 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4731 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4732 rif
->after_update_window_line_hook (desired_row
);
4735 /* Update current_row from desired_row. */
4736 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4742 /* Set the cursor after an update of window W. This function may only
4743 be called from update_window. */
4746 set_window_cursor_after_update (w
)
4749 struct frame
*f
= XFRAME (w
->frame
);
4750 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4751 int cx
, cy
, vpos
, hpos
;
4753 /* Not intended for frame matrix updates. */
4754 xassert (FRAME_WINDOW_P (f
));
4756 if (cursor_in_echo_area
4757 && !NILP (echo_area_buffer
[0])
4758 /* If we are showing a message instead of the mini-buffer,
4759 show the cursor for the message instead. */
4760 && XWINDOW (minibuf_window
) == w
4761 && EQ (minibuf_window
, echo_area_window
)
4762 /* These cases apply only to the frame that contains
4763 the active mini-buffer window. */
4764 && FRAME_HAS_MINIBUF_P (f
)
4765 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4767 cx
= cy
= vpos
= hpos
= 0;
4769 if (cursor_in_echo_area
>= 0)
4771 /* If the mini-buffer is several lines high, find the last
4772 line that has any text on it. Note: either all lines
4773 are enabled or none. Otherwise we wouldn't be able to
4775 struct glyph_row
*row
, *last_row
;
4776 struct glyph
*glyph
;
4777 int yb
= window_text_bottom_y (w
);
4780 row
= w
->current_matrix
->rows
;
4781 while (row
->enabled_p
4782 && (last_row
== NULL
4783 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4785 if (row
->used
[TEXT_AREA
]
4786 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4793 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4794 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4796 while (last
> start
&& last
->charpos
< 0)
4799 for (glyph
= start
; glyph
< last
; ++glyph
)
4801 cx
+= glyph
->pixel_width
;
4806 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4814 hpos
= w
->cursor
.hpos
;
4815 vpos
= w
->cursor
.vpos
;
4818 /* Window cursor can be out of sync for horizontally split windows. */
4819 hpos
= max (0, hpos
);
4820 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4821 vpos
= max (0, vpos
);
4822 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4823 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4827 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4828 tree rooted at W. */
4831 set_window_update_flags (w
, on_p
)
4837 if (!NILP (w
->hchild
))
4838 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4839 else if (!NILP (w
->vchild
))
4840 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4842 w
->must_be_updated_p
= on_p
;
4844 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4850 /***********************************************************************
4851 Window-Based Scrolling
4852 ***********************************************************************/
4854 /* Structure describing rows in scrolling_window. */
4858 /* Number of occurrences of this row in desired and current matrix. */
4859 int old_uses
, new_uses
;
4861 /* Vpos of row in new matrix. */
4862 int new_line_number
;
4864 /* Bucket index of this row_entry in the hash table row_table. */
4867 /* The row described by this entry. */
4868 struct glyph_row
*row
;
4870 /* Hash collision chain. */
4871 struct row_entry
*next
;
4874 /* A pool to allocate row_entry structures from, and the size of the
4875 pool. The pool is reallocated in scrolling_window when we find
4876 that we need a larger one. */
4878 static struct row_entry
*row_entry_pool
;
4879 static int row_entry_pool_size
;
4881 /* Index of next free entry in row_entry_pool. */
4883 static int row_entry_idx
;
4885 /* The hash table used during scrolling, and the table's size. This
4886 table is used to quickly identify equal rows in the desired and
4889 static struct row_entry
**row_table
;
4890 static int row_table_size
;
4892 /* Vectors of pointers to row_entry structures belonging to the
4893 current and desired matrix, and the size of the vectors. */
4895 static struct row_entry
**old_lines
, **new_lines
;
4896 static int old_lines_size
, new_lines_size
;
4898 /* A pool to allocate run structures from, and its size. */
4900 static struct run
*run_pool
;
4901 static int runs_size
;
4903 /* A vector of runs of lines found during scrolling. */
4905 static struct run
**runs
;
4907 /* Add glyph row ROW to the scrolling hash table during the scrolling
4910 static INLINE
struct row_entry
*
4911 add_row_entry (w
, row
)
4913 struct glyph_row
*row
;
4915 struct row_entry
*entry
;
4916 int i
= row
->hash
% row_table_size
;
4918 entry
= row_table
[i
];
4919 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4920 entry
= entry
->next
;
4924 entry
= row_entry_pool
+ row_entry_idx
++;
4926 entry
->old_uses
= entry
->new_uses
= 0;
4927 entry
->new_line_number
= 0;
4929 entry
->next
= row_table
[i
];
4930 row_table
[i
] = entry
;
4937 /* Try to reuse part of the current display of W by scrolling lines.
4938 HEADER_LINE_P non-zero means W has a header line.
4940 The algorithm is taken from Communications of the ACM, Apr78 "A
4941 Technique for Isolating Differences Between Files." It should take
4944 A short outline of the steps of the algorithm
4946 1. Skip lines equal at the start and end of both matrices.
4948 2. Enter rows in the current and desired matrix into a symbol
4949 table, counting how often they appear in both matrices.
4951 3. Rows that appear exactly once in both matrices serve as anchors,
4952 i.e. we assume that such lines are likely to have been moved.
4954 4. Starting from anchor lines, extend regions to be scrolled both
4955 forward and backward.
4959 -1 if all rows were found to be equal.
4960 0 to indicate that we did not scroll the display, or
4961 1 if we did scroll. */
4964 scrolling_window (w
, header_line_p
)
4968 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4969 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4970 int yb
= window_text_bottom_y (w
);
4971 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4972 int nruns
, nbytes
, n
, run_idx
;
4973 struct row_entry
*entry
;
4974 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4976 /* Skip over rows equal at the start. */
4977 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4979 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4980 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4984 && !d
->redraw_fringe_bitmaps_p
4986 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4987 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4988 && row_equal_p (w
, c
, d
, 1))
4997 /* Give up if some rows in the desired matrix are not enabled. */
4998 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5001 first_old
= first_new
= i
;
5003 /* Set last_new to the index + 1 of the last enabled row in the
5006 while (i
< desired_matrix
->nrows
- 1
5007 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
5008 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
5011 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5016 /* Set last_old to the index + 1 of the last enabled row in the
5017 current matrix. We don't look at the enabled flag here because
5018 we plan to reuse part of the display even if other parts are
5021 while (i
< current_matrix
->nrows
- 1)
5023 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
5032 /* Skip over rows equal at the bottom. */
5035 while (i
- 1 > first_new
5036 && j
- 1 > first_old
5037 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
5038 && (MATRIX_ROW (current_matrix
, i
- 1)->y
5039 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
5040 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
5042 MATRIX_ROW (desired_matrix
, i
- 1),
5043 MATRIX_ROW (current_matrix
, j
- 1), 1))
5048 /* Nothing to do if all rows are equal. */
5049 if (last_new
== first_new
)
5052 /* Reallocate vectors, tables etc. if necessary. */
5054 if (current_matrix
->nrows
> old_lines_size
)
5056 old_lines_size
= current_matrix
->nrows
;
5057 nbytes
= old_lines_size
* sizeof *old_lines
;
5058 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5061 if (desired_matrix
->nrows
> new_lines_size
)
5063 new_lines_size
= desired_matrix
->nrows
;
5064 nbytes
= new_lines_size
* sizeof *new_lines
;
5065 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5068 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5069 if (3 * n
> row_table_size
)
5071 row_table_size
= next_almost_prime (3 * n
);
5072 nbytes
= row_table_size
* sizeof *row_table
;
5073 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5074 bzero (row_table
, nbytes
);
5077 if (n
> row_entry_pool_size
)
5079 row_entry_pool_size
= n
;
5080 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5081 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5084 if (desired_matrix
->nrows
> runs_size
)
5086 runs_size
= desired_matrix
->nrows
;
5087 nbytes
= runs_size
* sizeof *runs
;
5088 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5089 nbytes
= runs_size
* sizeof *run_pool
;
5090 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5093 nruns
= run_idx
= 0;
5096 /* Add rows from the current and desired matrix to the hash table
5097 row_hash_table to be able to find equal ones quickly. */
5099 for (i
= first_old
; i
< last_old
; ++i
)
5101 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5103 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5104 old_lines
[i
] = entry
;
5108 old_lines
[i
] = NULL
;
5111 for (i
= first_new
; i
< last_new
; ++i
)
5113 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5114 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5116 entry
->new_line_number
= i
;
5117 new_lines
[i
] = entry
;
5120 /* Identify moves based on lines that are unique and equal
5121 in both matrices. */
5122 for (i
= first_old
; i
< last_old
;)
5124 && old_lines
[i
]->old_uses
== 1
5125 && old_lines
[i
]->new_uses
== 1)
5128 int new_line
= old_lines
[i
]->new_line_number
;
5129 struct run
*run
= run_pool
+ run_idx
++;
5132 run
->current_vpos
= i
;
5133 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5134 run
->desired_vpos
= new_line
;
5135 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5137 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5139 /* Extend backward. */
5142 while (j
> first_old
5144 && old_lines
[j
] == new_lines
[k
])
5146 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5147 --run
->current_vpos
;
5148 --run
->desired_vpos
;
5151 run
->desired_y
-= h
;
5152 run
->current_y
-= h
;
5156 /* Extend forward. */
5161 && old_lines
[j
] == new_lines
[k
])
5163 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5169 /* Insert run into list of all runs. Order runs by copied
5170 pixel lines. Note that we record runs that don't have to
5171 be copied because they are already in place. This is done
5172 because we can avoid calling update_window_line in this
5174 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5176 for (k
= nruns
; k
> j
; --k
)
5177 runs
[k
] = runs
[k
- 1];
5186 /* Do the moves. Do it in a way that we don't overwrite something
5187 we want to copy later on. This is not solvable in general
5188 because there is only one display and we don't have a way to
5189 exchange areas on this display. Example:
5191 +-----------+ +-----------+
5193 +-----------+ --> +-----------+
5195 +-----------+ +-----------+
5197 Instead, prefer bigger moves, and invalidate moves that would
5198 copy from where we copied to. */
5200 for (i
= 0; i
< nruns
; ++i
)
5201 if (runs
[i
]->nrows
> 0)
5203 struct run
*r
= runs
[i
];
5205 /* Copy on the display. */
5206 if (r
->current_y
!= r
->desired_y
)
5208 rif
->scroll_run_hook (w
, r
);
5210 /* Invalidate runs that copy from where we copied to. */
5211 for (j
= i
+ 1; j
< nruns
; ++j
)
5213 struct run
*p
= runs
[j
];
5215 if ((p
->current_y
>= r
->desired_y
5216 && p
->current_y
< r
->desired_y
+ r
->height
)
5217 || (p
->current_y
+ p
->height
>= r
->desired_y
5218 && (p
->current_y
+ p
->height
5219 < r
->desired_y
+ r
->height
)))
5224 /* Assign matrix rows. */
5225 for (j
= 0; j
< r
->nrows
; ++j
)
5227 struct glyph_row
*from
, *to
;
5228 int to_overlapped_p
;
5230 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5231 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5232 to_overlapped_p
= to
->overlapped_p
;
5233 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5234 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5235 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5236 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5237 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5238 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5239 from
->redraw_fringe_bitmaps_p
= 1;
5240 assign_row (to
, from
);
5241 to
->enabled_p
= 1, from
->enabled_p
= 0;
5242 to
->overlapped_p
= to_overlapped_p
;
5246 /* Clear the hash table, for the next time. */
5247 for (i
= 0; i
< row_entry_idx
; ++i
)
5248 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5250 /* Value is > 0 to indicate that we scrolled the display. */
5256 /************************************************************************
5258 ************************************************************************/
5260 /* Update the desired frame matrix of frame F.
5262 FORCE_P non-zero means that the update should not be stopped by
5263 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5264 should not be tried.
5266 Value is non-zero if update was stopped due to pending input. */
5269 update_frame_1 (f
, force_p
, inhibit_id_p
)
5274 /* Frame matrices to work on. */
5275 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5276 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5279 int preempt_count
= baud_rate
/ 2400 + 1;
5280 extern int input_pending
;
5282 xassert (current_matrix
&& desired_matrix
);
5284 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5285 calculate_costs (f
);
5287 if (preempt_count
<= 0)
5290 #if !PERIODIC_PREEMPTION_CHECKING
5291 if (!force_p
&& detect_input_pending_ignore_squeezables ())
5298 /* If we cannot insert/delete lines, it's no use trying it. */
5299 if (!FRAME_LINE_INS_DEL_OK (f
))
5302 /* See if any of the desired lines are enabled; don't compute for
5303 i/d line if just want cursor motion. */
5304 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5305 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5308 /* Try doing i/d line, if not yet inhibited. */
5309 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5310 force_p
|= scrolling (f
);
5312 /* Update the individual lines as needed. Do bottom line first. */
5313 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5314 update_frame_line (f
, desired_matrix
->nrows
- 1);
5316 /* Now update the rest of the lines. */
5317 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5319 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5321 if (FRAME_TERMCAP_P (f
))
5323 /* Flush out every so many lines.
5324 Also flush out if likely to have more than 1k buffered
5325 otherwise. I'm told that some telnet connections get
5326 really screwed by more than 1k output at once. */
5327 FILE *display_output
= FRAME_TTY (f
)->output
;
5330 int outq
= PENDING_OUTPUT_COUNT (display_output
);
5332 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5334 fflush (display_output
);
5335 if (preempt_count
== 1)
5337 #ifdef EMACS_OUTQSIZE
5338 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5339 /* Probably not a tty. Ignore the error and reset
5341 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5344 if (baud_rate
<= outq
&& baud_rate
> 0)
5345 sleep (outq
/ baud_rate
);
5351 #if PERIODIC_PREEMPTION_CHECKING
5355 EMACS_GET_TIME (tm
);
5356 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5357 if (EMACS_TIME_NEG_P (dif
))
5359 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5360 if (detect_input_pending_ignore_squeezables ())
5365 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5366 detect_input_pending_ignore_squeezables ();
5369 update_frame_line (f
, i
);
5373 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5375 /* Now just clean up termcap drivers and set cursor, etc. */
5378 if ((cursor_in_echo_area
5379 /* If we are showing a message instead of the mini-buffer,
5380 show the cursor for the message instead of for the
5381 (now hidden) mini-buffer contents. */
5382 || (EQ (minibuf_window
, selected_window
)
5383 && EQ (minibuf_window
, echo_area_window
)
5384 && !NILP (echo_area_buffer
[0])))
5385 /* These cases apply only to the frame that contains
5386 the active mini-buffer window. */
5387 && FRAME_HAS_MINIBUF_P (f
)
5388 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5390 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5393 if (cursor_in_echo_area
< 0)
5395 /* Negative value of cursor_in_echo_area means put
5396 cursor at beginning of line. */
5402 /* Positive value of cursor_in_echo_area means put
5403 cursor at the end of the prompt. If the mini-buffer
5404 is several lines high, find the last line that has
5406 row
= FRAME_LINES (f
);
5412 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5414 /* Frame rows are filled up with spaces that
5415 must be ignored here. */
5416 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5418 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5419 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5422 && (last
- 1)->charpos
< 0)
5428 while (row
> top
&& col
== 0);
5430 /* Make sure COL is not out of range. */
5431 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5433 /* If we have another row, advance cursor into it. */
5434 if (row
< FRAME_LINES (f
) - 1)
5436 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5439 /* Otherwise move it back in range. */
5441 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5445 cursor_to (f
, row
, col
);
5449 /* We have only one cursor on terminal frames. Use it to
5450 display the cursor of the selected window. */
5451 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5452 if (w
->cursor
.vpos
>= 0
5453 /* The cursor vpos may be temporarily out of bounds
5454 in the following situation: There is one window,
5455 with the cursor in the lower half of it. The window
5456 is split, and a message causes a redisplay before
5457 a new cursor position has been computed. */
5458 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5460 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5461 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5463 if (INTEGERP (w
->left_margin_cols
))
5464 x
+= XFASTINT (w
->left_margin_cols
);
5466 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5467 cursor_to (f
, y
, x
);
5474 clear_desired_matrices (f
);
5479 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5483 struct frame
*frame
;
5485 int unchanged_at_top
, unchanged_at_bottom
;
5488 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5489 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5490 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5491 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5493 int free_at_end_vpos
= FRAME_LINES (frame
);
5494 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5495 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5497 if (!current_matrix
)
5500 /* Compute hash codes of all the lines. Also calculate number of
5501 changed lines, number of unchanged lines at the beginning, and
5502 number of unchanged lines at the end. */
5504 unchanged_at_top
= 0;
5505 unchanged_at_bottom
= FRAME_LINES (frame
);
5506 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5508 /* Give up on this scrolling if some old lines are not enabled. */
5509 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5511 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5512 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5514 /* This line cannot be redrawn, so don't let scrolling mess it. */
5515 new_hash
[i
] = old_hash
[i
];
5516 #define INFINITY 1000000 /* Taken from scroll.c */
5517 draw_cost
[i
] = INFINITY
;
5521 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5522 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5525 if (old_hash
[i
] != new_hash
[i
])
5528 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5530 else if (i
== unchanged_at_top
)
5532 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5535 /* If changed lines are few, don't allow preemption, don't scroll. */
5536 if ((!FRAME_SCROLL_REGION_OK (frame
)
5537 && changed_lines
< baud_rate
/ 2400)
5538 || unchanged_at_bottom
== FRAME_LINES (frame
))
5541 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5542 - unchanged_at_bottom
);
5544 if (FRAME_SCROLL_REGION_OK (frame
))
5545 free_at_end_vpos
-= unchanged_at_bottom
;
5546 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5547 free_at_end_vpos
= -1;
5549 /* If large window, fast terminal and few lines in common between
5550 current frame and desired frame, don't bother with i/d calc. */
5551 if (!FRAME_SCROLL_REGION_OK (frame
)
5552 && window_size
>= 18 && baud_rate
> 2400
5554 10 * scrolling_max_lines_saved (unchanged_at_top
,
5555 FRAME_LINES (frame
) - unchanged_at_bottom
,
5556 old_hash
, new_hash
, draw_cost
)))
5559 if (window_size
< 2)
5562 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5563 draw_cost
+ unchanged_at_top
- 1,
5564 old_draw_cost
+ unchanged_at_top
- 1,
5565 old_hash
+ unchanged_at_top
- 1,
5566 new_hash
+ unchanged_at_top
- 1,
5567 free_at_end_vpos
- unchanged_at_top
);
5573 /* Count the number of blanks at the start of the vector of glyphs R
5574 which is LEN glyphs long. */
5577 count_blanks (r
, len
)
5583 for (i
= 0; i
< len
; ++i
)
5584 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5591 /* Count the number of glyphs in common at the start of the glyph
5592 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5593 of STR2. Value is the number of equal glyphs equal at the start. */
5596 count_match (str1
, end1
, str2
, end2
)
5597 struct glyph
*str1
, *end1
, *str2
, *end2
;
5599 struct glyph
*p1
= str1
;
5600 struct glyph
*p2
= str2
;
5604 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5611 /* Char insertion/deletion cost vector, from term.c */
5613 extern int *char_ins_del_vector
;
5614 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5617 /* Perform a frame-based update on line VPOS in frame FRAME. */
5620 update_frame_line (f
, vpos
)
5624 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5626 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5627 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5628 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5629 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5630 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5631 int must_write_whole_line_p
;
5632 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5633 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5634 != FACE_TTY_DEFAULT_BG_COLOR
);
5636 if (colored_spaces_p
)
5639 /* Current row not enabled means it has unknown contents. We must
5640 write the whole desired line in that case. */
5641 must_write_whole_line_p
= !current_row
->enabled_p
;
5642 if (must_write_whole_line_p
)
5649 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5650 olen
= current_row
->used
[TEXT_AREA
];
5652 /* Ignore trailing spaces, if we can. */
5653 if (!write_spaces_p
)
5654 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5658 current_row
->enabled_p
= 1;
5659 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5661 /* If desired line is empty, just clear the line. */
5662 if (!desired_row
->enabled_p
)
5668 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5669 nlen
= desired_row
->used
[TEXT_AREA
];
5670 nend
= nbody
+ nlen
;
5672 /* If display line has unknown contents, write the whole line. */
5673 if (must_write_whole_line_p
)
5675 /* Ignore spaces at the end, if we can. */
5676 if (!write_spaces_p
)
5677 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5680 /* Write the contents of the desired line. */
5683 cursor_to (f
, vpos
, 0);
5684 write_glyphs (f
, nbody
, nlen
);
5687 /* Don't call clear_end_of_line if we already wrote the whole
5688 line. The cursor will not be at the right margin in that
5689 case but in the line below. */
5690 if (nlen
< FRAME_TOTAL_COLS (f
))
5692 cursor_to (f
, vpos
, nlen
);
5693 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5696 /* Make sure we are in the right row, otherwise cursor movement
5697 with cmgoto might use `ch' in the wrong row. */
5698 cursor_to (f
, vpos
, 0);
5700 make_current (desired_matrix
, current_matrix
, vpos
);
5704 /* Pretend trailing spaces are not there at all,
5705 unless for one reason or another we must write all spaces. */
5706 if (!write_spaces_p
)
5707 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5710 /* If there's no i/d char, quickly do the best we can without it. */
5711 if (!FRAME_CHAR_INS_DEL_OK (f
))
5715 /* Find the first glyph in desired row that doesn't agree with
5716 a glyph in the current row, and write the rest from there on. */
5717 for (i
= 0; i
< nlen
; i
++)
5719 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5721 /* Find the end of the run of different glyphs. */
5725 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5726 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5729 /* Output this run of non-matching chars. */
5730 cursor_to (f
, vpos
, i
);
5731 write_glyphs (f
, nbody
+ i
, j
- i
);
5734 /* Now find the next non-match. */
5738 /* Clear the rest of the line, or the non-clear part of it. */
5741 cursor_to (f
, vpos
, nlen
);
5742 clear_end_of_line (f
, olen
);
5745 /* Make current row = desired row. */
5746 make_current (desired_matrix
, current_matrix
, vpos
);
5750 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5751 characters in a row. */
5755 /* If current line is blank, skip over initial spaces, if
5756 possible, and write the rest. */
5760 nsp
= count_blanks (nbody
, nlen
);
5764 cursor_to (f
, vpos
, nsp
);
5765 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5768 /* Exchange contents between current_frame and new_frame. */
5769 make_current (desired_matrix
, current_matrix
, vpos
);
5773 /* Compute number of leading blanks in old and new contents. */
5774 osp
= count_blanks (obody
, olen
);
5775 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5777 /* Compute number of matching chars starting with first non-blank. */
5778 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5779 nbody
+ nsp
, nbody
+ nlen
);
5781 /* Spaces in new match implicit space past the end of old. */
5782 /* A bug causing this to be a no-op was fixed in 18.29. */
5783 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5786 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5790 /* Avoid doing insert/delete char
5791 just cause number of leading spaces differs
5792 when the following text does not match. */
5793 if (begmatch
== 0 && osp
!= nsp
)
5794 osp
= nsp
= min (osp
, nsp
);
5796 /* Find matching characters at end of line */
5799 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5801 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5806 endmatch
= obody
+ olen
- op1
;
5808 /* tem gets the distance to insert or delete.
5809 endmatch is how many characters we save by doing so.
5812 tem
= (nlen
- nsp
) - (olen
- osp
);
5814 && (!FRAME_CHAR_INS_DEL_OK (f
)
5815 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5818 /* nsp - osp is the distance to insert or delete.
5819 If that is nonzero, begmatch is known to be nonzero also.
5820 begmatch + endmatch is how much we save by doing the ins/del.
5824 && (!FRAME_CHAR_INS_DEL_OK (f
)
5825 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5829 osp
= nsp
= min (osp
, nsp
);
5832 /* Now go through the line, inserting, writing and
5833 deleting as appropriate. */
5837 cursor_to (f
, vpos
, nsp
);
5838 delete_glyphs (f
, osp
- nsp
);
5842 /* If going to delete chars later in line
5843 and insert earlier in the line,
5844 must delete first to avoid losing data in the insert */
5845 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5847 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5848 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5849 olen
= nlen
- (nsp
- osp
);
5851 cursor_to (f
, vpos
, osp
);
5852 insert_glyphs (f
, 0, nsp
- osp
);
5856 tem
= nsp
+ begmatch
+ endmatch
;
5857 if (nlen
!= tem
|| olen
!= tem
)
5859 if (!endmatch
|| nlen
== olen
)
5861 /* If new text being written reaches right margin, there is
5862 no need to do clear-to-eol at the end of this function
5863 (and it would not be safe, since cursor is not going to
5864 be "at the margin" after the text is done). */
5865 if (nlen
== FRAME_TOTAL_COLS (f
))
5868 /* Function write_glyphs is prepared to do nothing
5869 if passed a length <= 0. Check it here to avoid
5870 unnecessary cursor movement. */
5873 cursor_to (f
, vpos
, nsp
+ begmatch
);
5874 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5877 else if (nlen
> olen
)
5879 /* Here, we used to have the following simple code:
5880 ----------------------------------------
5881 write_glyphs (nbody + nsp + begmatch, olen - tem);
5882 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5883 ----------------------------------------
5884 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5885 is a padding glyph. */
5886 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5889 cursor_to (f
, vpos
, nsp
+ begmatch
);
5891 /* Calculate columns we can actually overwrite. */
5892 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5894 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5896 /* If we left columns to be overwritten, we must delete them. */
5897 del
= olen
- tem
- out
;
5899 delete_glyphs (f
, del
);
5901 /* At last, we insert columns not yet written out. */
5902 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5905 else if (olen
> nlen
)
5907 cursor_to (f
, vpos
, nsp
+ begmatch
);
5908 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5909 delete_glyphs (f
, olen
- nlen
);
5915 /* If any unerased characters remain after the new line, erase them. */
5918 cursor_to (f
, vpos
, nlen
);
5919 clear_end_of_line (f
, olen
);
5922 /* Exchange contents between current_frame and new_frame. */
5923 make_current (desired_matrix
, current_matrix
, vpos
);
5928 /***********************************************************************
5929 X/Y Position -> Buffer Position
5930 ***********************************************************************/
5932 /* Determine what's under window-relative pixel position (*X, *Y).
5933 Return the object (string or buffer) that's there.
5934 Return in *POS the position in that object.
5935 Adjust *X and *Y to character positions. */
5938 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5941 struct display_pos
*pos
;
5942 Lisp_Object
*object
;
5944 int *width
, *height
;
5947 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5948 struct text_pos startp
;
5950 struct glyph_row
*row
;
5951 #ifdef HAVE_WINDOW_SYSTEM
5952 struct image
*img
= 0;
5956 /* We used to set current_buffer directly here, but that does the
5957 wrong thing with `face-remapping-alist' (bug#2044). */
5958 Fset_buffer (w
->buffer
);
5959 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5960 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5961 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5962 start_display (&it
, w
, startp
);
5964 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5965 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5966 MOVE_TO_X
| MOVE_TO_Y
);
5968 Fset_buffer (old_current_buffer
);
5970 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5971 *dy
= *y
- it
.current_y
;
5974 if (STRINGP (it
.string
))
5978 #ifdef HAVE_WINDOW_SYSTEM
5979 if (it
.what
== IT_IMAGE
)
5981 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5982 && !NILP (img
->spec
))
5983 *object
= img
->spec
;
5987 if (it
.vpos
< w
->current_matrix
->nrows
5988 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5991 if (it
.hpos
< row
->used
[TEXT_AREA
])
5993 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5994 #ifdef HAVE_WINDOW_SYSTEM
5997 *dy
-= row
->ascent
- glyph
->ascent
;
5998 *dx
+= glyph
->slice
.x
;
5999 *dy
+= glyph
->slice
.y
;
6000 /* Image slices positions are still relative to the entire image */
6001 *width
= img
->width
;
6002 *height
= img
->height
;
6007 *width
= glyph
->pixel_width
;
6008 *height
= glyph
->ascent
+ glyph
->descent
;
6014 *height
= row
->height
;
6019 *width
= *height
= 0;
6022 /* Add extra (default width) columns if clicked after EOL. */
6023 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
6025 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
6034 /* Value is the string under window-relative coordinates X/Y in the
6035 mode line or header line (PART says which) of window W, or nil if none.
6036 *CHARPOS is set to the position in the string returned. */
6039 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6041 enum window_part part
;
6044 Lisp_Object
*object
;
6046 int *width
, *height
;
6048 struct glyph_row
*row
;
6049 struct glyph
*glyph
, *end
;
6051 Lisp_Object string
= Qnil
;
6053 if (part
== ON_MODE_LINE
)
6054 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
6056 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
6058 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6060 if (row
->mode_line_p
&& row
->enabled_p
)
6062 /* Find the glyph under X. If we find one with a string object,
6063 it's the one we were looking for. */
6064 glyph
= row
->glyphs
[TEXT_AREA
];
6065 end
= glyph
+ row
->used
[TEXT_AREA
];
6066 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6067 x0
-= glyph
->pixel_width
;
6068 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6071 string
= glyph
->object
;
6072 *charpos
= glyph
->charpos
;
6073 *width
= glyph
->pixel_width
;
6074 *height
= glyph
->ascent
+ glyph
->descent
;
6075 #ifdef HAVE_WINDOW_SYSTEM
6076 if (glyph
->type
== IMAGE_GLYPH
)
6079 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6081 *object
= img
->spec
;
6082 y0
-= row
->ascent
- glyph
->ascent
;
6088 /* Add extra (default width) columns if clicked after EOL. */
6089 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6091 *height
= row
->height
;
6098 *width
= *height
= 0;
6108 /* Value is the string under window-relative coordinates X/Y in either
6109 marginal area, or nil if none. *CHARPOS is set to the position in
6110 the string returned. */
6113 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6115 enum window_part part
;
6118 Lisp_Object
*object
;
6120 int *width
, *height
;
6122 struct glyph_row
*row
= w
->current_matrix
->rows
;
6123 struct glyph
*glyph
, *end
;
6124 int x0
, y0
, i
, wy
= *y
;
6126 Lisp_Object string
= Qnil
;
6128 if (part
== ON_LEFT_MARGIN
)
6129 area
= LEFT_MARGIN_AREA
;
6130 else if (part
== ON_RIGHT_MARGIN
)
6131 area
= RIGHT_MARGIN_AREA
;
6135 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6136 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6139 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6143 /* Find the glyph under X. If we find one with a string object,
6144 it's the one we were looking for. */
6145 if (area
== RIGHT_MARGIN_AREA
)
6146 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6147 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6148 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6149 + window_box_width (w
, LEFT_MARGIN_AREA
)
6150 + window_box_width (w
, TEXT_AREA
));
6152 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6153 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6156 glyph
= row
->glyphs
[area
];
6157 end
= glyph
+ row
->used
[area
];
6158 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6159 x0
-= glyph
->pixel_width
;
6160 *x
= glyph
- row
->glyphs
[area
];
6163 string
= glyph
->object
;
6164 *charpos
= glyph
->charpos
;
6165 *width
= glyph
->pixel_width
;
6166 *height
= glyph
->ascent
+ glyph
->descent
;
6167 #ifdef HAVE_WINDOW_SYSTEM
6168 if (glyph
->type
== IMAGE_GLYPH
)
6171 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6173 *object
= img
->spec
;
6174 y0
-= row
->ascent
- glyph
->ascent
;
6175 x0
+= glyph
->slice
.x
;
6176 y0
+= glyph
->slice
.y
;
6182 /* Add extra (default width) columns if clicked after EOL. */
6183 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6185 *height
= row
->height
;
6192 *width
= *height
= 0;
6202 /***********************************************************************
6203 Changing Frame Sizes
6204 ***********************************************************************/
6209 window_change_signal (signalnum
) /* If we don't have an argument, */
6210 int signalnum
; /* some compilers complain in signal calls. */
6216 int old_errno
= errno
;
6218 struct tty_display_info
*tty
;
6220 signal (SIGWINCH
, window_change_signal
);
6221 SIGNAL_THREAD_CHECK (signalnum
);
6223 /* The frame size change obviously applies to a single
6224 termcap-controlled terminal, but we can't decide which.
6225 Therefore, we resize the frames corresponding to each tty.
6227 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6229 if (! tty
->term_initted
)
6232 /* Suspended tty frames have tty->input == NULL avoid trying to
6237 get_tty_size (fileno (tty
->input
), &width
, &height
);
6239 if (width
> 5 && height
> 2) {
6240 Lisp_Object tail
, frame
;
6242 FOR_EACH_FRAME (tail
, frame
)
6243 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6244 /* Record the new sizes, but don't reallocate the data
6245 structures now. Let that be done later outside of the
6247 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6253 #endif /* SIGWINCH */
6256 /* Do any change in frame size that was requested by a signal. SAFE
6257 non-zero means this function is called from a place where it is
6258 safe to change frame sizes while a redisplay is in progress. */
6261 do_pending_window_change (safe
)
6264 /* If window_change_signal should have run before, run it now. */
6265 if (redisplaying_p
&& !safe
)
6268 while (delayed_size_change
)
6270 Lisp_Object tail
, frame
;
6272 delayed_size_change
= 0;
6274 FOR_EACH_FRAME (tail
, frame
)
6276 struct frame
*f
= XFRAME (frame
);
6278 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6279 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6286 /* Change the frame height and/or width. Values may be given as zero to
6287 indicate no change is to take place.
6289 If DELAY is non-zero, then assume we're being called from a signal
6290 handler, and queue the change for later - perhaps the next
6291 redisplay. Since this tries to resize windows, we can't call it
6292 from a signal handler.
6294 SAFE non-zero means this function is called from a place where it's
6295 safe to change frame sizes while a redisplay is in progress. */
6298 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6299 register struct frame
*f
;
6300 int newheight
, newwidth
, pretend
, delay
, safe
;
6302 Lisp_Object tail
, frame
;
6304 if (FRAME_MSDOS_P (f
))
6306 /* On MS-DOS, all frames use the same screen, so a change in
6307 size affects all frames. Termcap now supports multiple
6309 FOR_EACH_FRAME (tail
, frame
)
6310 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6311 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6312 pretend
, delay
, safe
);
6315 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6319 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6320 register struct frame
*f
;
6321 int newheight
, newwidth
, pretend
, delay
, safe
;
6323 int new_frame_total_cols
;
6324 int count
= SPECPDL_INDEX ();
6326 /* If we can't deal with the change now, queue it for later. */
6327 if (delay
|| (redisplaying_p
&& !safe
))
6329 f
->new_text_lines
= newheight
;
6330 f
->new_text_cols
= newwidth
;
6331 delayed_size_change
= 1;
6335 /* This size-change overrides any pending one for this frame. */
6336 f
->new_text_lines
= 0;
6337 f
->new_text_cols
= 0;
6339 /* If an argument is zero, set it to the current value. */
6341 newheight
= FRAME_LINES (f
);
6343 newwidth
= FRAME_COLS (f
);
6345 /* Compute width of windows in F.
6346 This is the width of the frame without vertical scroll bars. */
6347 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6349 /* Round up to the smallest acceptable size. */
6350 check_frame_size (f
, &newheight
, &newwidth
);
6352 /* If we're not changing the frame size, quit now. */
6353 /* Frame width may be unchanged but the text portion may change, for example,
6354 fullscreen and remove/add scroll bar. */
6355 if (newheight
== FRAME_LINES (f
)
6356 && newwidth
== FRAME_COLS (f
) // text portion unchanged
6357 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
6363 /* We only can set screen dimensions to certain values supported
6364 by our video hardware. Try to find the smallest size greater
6365 or equal to the requested dimensions. */
6366 dos_set_window_size (&newheight
, &newwidth
);
6369 if (newheight
!= FRAME_LINES (f
))
6371 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6373 /* Frame has both root and mini-buffer. */
6374 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6375 FRAME_TOP_MARGIN (f
));
6376 set_window_height (FRAME_ROOT_WINDOW (f
),
6379 - FRAME_TOP_MARGIN (f
)),
6381 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6383 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6386 /* Frame has just one top-level window. */
6387 set_window_height (FRAME_ROOT_WINDOW (f
),
6388 newheight
- FRAME_TOP_MARGIN (f
), 2);
6390 /* MSDOS frames cannot PRETEND, as they change frame size by
6391 manipulating video hardware. */
6392 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6393 FrameRows (FRAME_TTY (f
)) = newheight
;
6396 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6398 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6399 if (FRAME_HAS_MINIBUF_P (f
))
6400 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6402 /* MSDOS frames cannot PRETEND, as they change frame size by
6403 manipulating video hardware. */
6404 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6405 FrameCols (FRAME_TTY (f
)) = newwidth
;
6407 if (WINDOWP (f
->tool_bar_window
))
6408 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6411 FRAME_LINES (f
) = newheight
;
6412 SET_FRAME_COLS (f
, newwidth
);
6415 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6416 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6418 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6420 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6421 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6422 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6423 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6427 calculate_costs (f
);
6428 SET_FRAME_GARBAGED (f
);
6433 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6435 run_window_configuration_change_hook (f
);
6437 unbind_to (count
, Qnil
);
6442 /***********************************************************************
6443 Terminal Related Lisp Functions
6444 ***********************************************************************/
6446 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6447 1, 1, "FOpen termscript file: ",
6448 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6449 FILE = nil means just close any termscript file currently open. */)
6453 struct tty_display_info
*tty
;
6455 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
6456 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
6457 error ("Current frame is not on a tty device");
6461 if (tty
->termscript
!= 0)
6464 fclose (tty
->termscript
);
6467 tty
->termscript
= 0;
6471 file
= Fexpand_file_name (file
, Qnil
);
6472 tty
->termscript
= fopen (SDATA (file
), "w");
6473 if (tty
->termscript
== 0)
6474 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6480 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6481 Ssend_string_to_terminal
, 1, 2, 0,
6482 doc
: /* Send STRING to the terminal without alteration.
6483 Control characters in STRING will have terminal-dependent effects.
6485 Optional parameter TERMINAL specifies the tty terminal device to use.
6486 It may be a terminal object, a frame, or nil for the terminal used by
6487 the currently selected frame. In batch mode, STRING is sent to stdout
6488 when TERMINAL is nil. */)
6491 Lisp_Object terminal
;
6493 struct terminal
*t
= get_terminal (terminal
, 1);
6496 /* ??? Perhaps we should do something special for multibyte strings here. */
6497 CHECK_STRING (string
);
6501 error ("Unknown terminal device");
6503 if (t
->type
== output_initial
)
6505 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
6506 error ("Device %d is not a termcap terminal device", t
->id
);
6509 struct tty_display_info
*tty
= t
->display_info
.tty
;
6512 error ("Terminal is currently suspended");
6514 if (tty
->termscript
)
6516 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6517 fflush (tty
->termscript
);
6521 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
6528 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6529 doc
: /* Beep, or flash the screen.
6530 Also, unless an argument is given,
6531 terminate any keyboard macro currently executing. */)
6540 ring_bell (XFRAME (selected_frame
));
6553 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6554 error ("Keyboard macro terminated by a command ringing the bell");
6556 ring_bell (XFRAME (selected_frame
));
6561 /***********************************************************************
6563 ***********************************************************************/
6565 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6566 doc
: /* Pause, without updating display, for SECONDS seconds.
6567 SECONDS may be a floating-point value, meaning that you can wait for a
6568 fraction of a second. Optional second arg MILLISECONDS specifies an
6569 additional wait period, in milliseconds; this may be useful if your
6570 Emacs was built without floating point support.
6571 \(Not all operating systems support waiting for a fraction of a second.) */)
6572 (seconds
, milliseconds
)
6573 Lisp_Object seconds
, milliseconds
;
6577 if (NILP (milliseconds
))
6578 XSETINT (milliseconds
, 0);
6580 CHECK_NUMBER (milliseconds
);
6581 usec
= XINT (milliseconds
) * 1000;
6584 double duration
= extract_float (seconds
);
6585 sec
= (int) duration
;
6586 usec
+= (duration
- sec
) * 1000000;
6589 #ifndef EMACS_HAS_USECS
6590 if (sec
== 0 && usec
!= 0)
6591 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6594 /* Assure that 0 <= usec < 1000000. */
6597 /* We can't rely on the rounding being correct if usec is negative. */
6598 if (-1000000 < usec
)
6599 sec
--, usec
+= 1000000;
6601 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6604 sec
+= usec
/ 1000000, usec
%= 1000000;
6606 if (sec
< 0 || (sec
== 0 && usec
== 0))
6609 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6615 /* This is just like wait_reading_process_output, except that
6618 TIMEOUT is number of seconds to wait (float or integer),
6619 or t to wait forever.
6620 READING is 1 if reading input.
6621 If DO_DISPLAY is >0 display process output while waiting.
6622 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6626 sit_for (timeout
, reading
, do_display
)
6627 Lisp_Object timeout
;
6628 int reading
, do_display
;
6632 swallow_events (do_display
);
6634 if ((detect_input_pending_run_timers (do_display
))
6635 || !NILP (Vexecuting_kbd_macro
))
6638 if (do_display
>= 2)
6639 redisplay_preserve_echo_area (2);
6641 if (INTEGERP (timeout
))
6643 sec
= XINT (timeout
);
6646 else if (FLOATP (timeout
))
6648 double seconds
= XFLOAT_DATA (timeout
);
6649 sec
= (int) seconds
;
6650 usec
= (int) ((seconds
- sec
) * 1000000);
6652 else if (EQ (timeout
, Qt
))
6658 wrong_type_argument (Qnumberp
, timeout
);
6660 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6667 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6670 return detect_input_pending () ? Qnil
: Qt
;
6674 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6675 doc
: /* Perform redisplay if no input is available.
6676 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6677 perform a full redisplay even if input is available.
6678 Return t if redisplay was performed, nil otherwise. */)
6685 if ((detect_input_pending_run_timers (1)
6686 && NILP (force
) && !redisplay_dont_pause
)
6687 || !NILP (Vexecuting_kbd_macro
))
6690 count
= SPECPDL_INDEX ();
6691 if (!NILP (force
) && !redisplay_dont_pause
)
6692 specbind (Qredisplay_dont_pause
, Qt
);
6693 redisplay_preserve_echo_area (2);
6694 unbind_to (count
, Qnil
);
6700 /***********************************************************************
6701 Other Lisp Functions
6702 ***********************************************************************/
6704 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6705 session's frames, frame names, buffers, buffer-read-only flags, and
6706 buffer-modified-flags. */
6708 static Lisp_Object frame_and_buffer_state
;
6711 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6712 Sframe_or_buffer_changed_p
, 0, 1, 0,
6713 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6714 VARIABLE is a variable name whose value is either nil or a state vector
6715 that will be updated to contain all frames and buffers,
6716 aside from buffers whose names start with space,
6717 along with the buffers' read-only and modified flags. This allows a fast
6718 check to see whether buffer menus might need to be recomputed.
6719 If this function returns non-nil, it updates the internal vector to reflect
6722 If VARIABLE is nil, an internal variable is used. Users should not
6723 pass nil for VARIABLE. */)
6725 Lisp_Object variable
;
6727 Lisp_Object state
, tail
, frame
, buf
;
6728 Lisp_Object
*vecp
, *end
;
6731 if (! NILP (variable
))
6733 CHECK_SYMBOL (variable
);
6734 state
= Fsymbol_value (variable
);
6735 if (! VECTORP (state
))
6739 state
= frame_and_buffer_state
;
6741 vecp
= XVECTOR (state
)->contents
;
6742 end
= vecp
+ XVECTOR (state
)->size
;
6744 FOR_EACH_FRAME (tail
, frame
)
6748 if (!EQ (*vecp
++, frame
))
6752 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6755 /* Check that the buffer info matches. */
6756 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6758 buf
= XCDR (XCAR (tail
));
6759 /* Ignore buffers that aren't included in buffer lists. */
6760 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6764 if (!EQ (*vecp
++, buf
))
6768 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6772 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6777 /* Detect deletion of a buffer at the end of the list. */
6778 if (EQ (*vecp
, Qlambda
))
6781 /* Come here if we decide the data has changed. */
6783 /* Count the size we will need.
6784 Start with 1 so there is room for at least one lambda at the end. */
6786 FOR_EACH_FRAME (tail
, frame
)
6788 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6790 /* Reallocate the vector if data has grown to need it,
6791 or if it has shrunk a lot. */
6792 if (! VECTORP (state
)
6793 || n
> XVECTOR (state
)->size
6794 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6795 /* Add 20 extra so we grow it less often. */
6797 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6798 if (! NILP (variable
))
6799 Fset (variable
, state
);
6801 frame_and_buffer_state
= state
;
6804 /* Record the new data in the (possibly reallocated) vector. */
6805 vecp
= XVECTOR (state
)->contents
;
6806 FOR_EACH_FRAME (tail
, frame
)
6809 *vecp
++ = XFRAME (frame
)->name
;
6811 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6813 buf
= XCDR (XCAR (tail
));
6814 /* Ignore buffers that aren't included in buffer lists. */
6815 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6818 *vecp
++ = XBUFFER (buf
)->read_only
;
6819 *vecp
++ = Fbuffer_modified_p (buf
);
6821 /* Fill up the vector with lambdas (always at least one). */
6823 while (vecp
- XVECTOR (state
)->contents
6824 < XVECTOR (state
)->size
)
6826 /* Make sure we didn't overflow the vector. */
6827 if (vecp
- XVECTOR (state
)->contents
6828 > XVECTOR (state
)->size
)
6835 /***********************************************************************
6837 ***********************************************************************/
6839 /* Initialization done when Emacs fork is started, before doing stty.
6840 Determine terminal type and set terminal_driver. Then invoke its
6841 decoding routine to set up variables in the terminal package. */
6846 char *terminal_type
;
6848 #ifdef HAVE_X_WINDOWS
6849 extern int display_arg
;
6852 /* Construct the space glyph. */
6853 space_glyph
.type
= CHAR_GLYPH
;
6854 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6855 space_glyph
.charpos
= -1;
6858 cursor_in_echo_area
= 0;
6859 terminal_type
= (char *) 0;
6861 /* Now is the time to initialize this; it's used by init_sys_modes
6863 Vinitial_window_system
= Qnil
;
6865 /* SIGWINCH needs to be handled no matter what display we start
6866 with. Otherwise newly opened tty frames will not resize
6871 #endif /* CANNOT_DUMP */
6872 signal (SIGWINCH
, window_change_signal
);
6873 #endif /* SIGWINCH */
6875 /* If running as a daemon, no need to initialize any frames/terminal. */
6879 /* If the user wants to use a window system, we shouldn't bother
6880 initializing the terminal. This is especially important when the
6881 terminal is so dumb that emacs gives up before and doesn't bother
6882 using the window system.
6884 If the DISPLAY environment variable is set and nonempty,
6885 try to use X, and die with an error message if that doesn't work. */
6887 #ifdef HAVE_X_WINDOWS
6888 if (! inhibit_window_system
&& ! display_arg
)
6891 display
= getenv ("DISPLAY");
6892 display_arg
= (display
!= 0 && *display
!= 0);
6894 if (display_arg
&& !x_display_ok (display
))
6896 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6898 inhibit_window_system
= 1;
6902 if (!inhibit_window_system
&& display_arg
6908 Vinitial_window_system
= Qx
;
6910 Vwindow_system_version
= make_number (11);
6912 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6913 /* In some versions of ncurses,
6914 tputs crashes if we have not called tgetent.
6916 { char b
[2044]; tgetent (b
, "xterm");}
6918 adjust_frame_glyphs_initially ();
6921 #endif /* HAVE_X_WINDOWS */
6924 if (!inhibit_window_system
)
6926 Vinitial_window_system
= Qw32
;
6927 Vwindow_system_version
= make_number (1);
6928 adjust_frame_glyphs_initially ();
6931 #endif /* HAVE_NTGUI */
6934 if (!inhibit_window_system
6940 Vinitial_window_system
= Qns
;
6941 Vwindow_system_version
= make_number(10);
6942 adjust_frame_glyphs_initially ();
6947 /* If no window system has been specified, try to use the terminal. */
6950 fatal ("standard input is not a tty");
6955 terminal_type
= "w32console";
6957 /* Look at the TERM variable. */
6958 terminal_type
= (char *) getenv ("TERM");
6962 #ifdef HAVE_WINDOW_SYSTEM
6963 if (! inhibit_window_system
)
6964 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6966 #endif /* HAVE_WINDOW_SYSTEM */
6967 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6973 struct frame
*f
= XFRAME (selected_frame
);
6975 /* Open a display on the controlling tty. */
6976 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6978 /* Convert the initial frame to use the new display. */
6979 if (f
->output_method
!= output_initial
)
6981 f
->output_method
= t
->type
;
6984 t
->reference_count
++;
6985 t
->display_info
.tty
->top_frame
= selected_frame
;
6986 change_frame_size (XFRAME (selected_frame
),
6987 FrameRows (t
->display_info
.tty
),
6988 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6990 /* Delete the initial terminal. */
6991 if (--initial_terminal
->reference_count
== 0
6992 && initial_terminal
->delete_terminal_hook
)
6993 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6995 /* Update frame parameters to reflect the new type. */
6996 Fmodify_frame_parameters
6997 (selected_frame
, Fcons (Fcons (Qtty_type
,
6998 Ftty_type (selected_frame
)), Qnil
));
6999 if (t
->display_info
.tty
->name
)
7000 Fmodify_frame_parameters (selected_frame
,
7001 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
7004 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
7009 struct frame
*sf
= SELECTED_FRAME ();
7010 int width
= FRAME_TOTAL_COLS (sf
);
7011 int height
= FRAME_LINES (sf
);
7013 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
7015 /* If these sizes are so big they cause overflow, just ignore the
7016 change. It's not clear what better we could do. */
7017 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
7018 fatal ("screen size %dx%d too big", width
, height
);
7021 adjust_frame_glyphs_initially ();
7022 calculate_costs (XFRAME (selected_frame
));
7024 /* Set up faces of the initial terminal frame of a dumped Emacs. */
7027 && NILP (Vinitial_window_system
))
7029 /* For the initial frame, we don't have any way of knowing what
7030 are the foreground and background colors of the terminal. */
7031 struct frame
*sf
= SELECTED_FRAME();
7033 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
7034 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
7035 call0 (intern ("tty-set-up-initial-frame-faces"));
7041 /***********************************************************************
7043 ***********************************************************************/
7045 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
7046 Sinternal_show_cursor
, 2, 2, 0,
7047 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
7048 WINDOW nil means use the selected window. SHOW non-nil means
7049 show a cursor in WINDOW in the next redisplay. SHOW nil means
7050 don't show a cursor. */)
7052 Lisp_Object window
, show
;
7054 /* Don't change cursor state while redisplaying. This could confuse
7056 if (!redisplaying_p
)
7059 window
= selected_window
;
7061 CHECK_WINDOW (window
);
7063 XWINDOW (window
)->cursor_off_p
= NILP (show
);
7070 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
7071 Sinternal_show_cursor_p
, 0, 1, 0,
7072 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
7073 WINDOW nil or omitted means report on the selected window. */)
7080 window
= selected_window
;
7082 CHECK_WINDOW (window
);
7084 w
= XWINDOW (window
);
7085 return w
->cursor_off_p
? Qnil
: Qt
;
7088 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
7089 Slast_nonminibuf_frame
, 0, 0, 0,
7090 doc
: /* Value is last nonminibuffer frame. */)
7093 Lisp_Object frame
= Qnil
;
7095 if (last_nonminibuf_frame
)
7096 XSETFRAME (frame
, last_nonminibuf_frame
);
7101 /***********************************************************************
7103 ***********************************************************************/
7108 defsubr (&Sredraw_frame
);
7109 defsubr (&Sredraw_display
);
7110 defsubr (&Sframe_or_buffer_changed_p
);
7111 defsubr (&Sopen_termscript
);
7113 defsubr (&Sredisplay
);
7114 defsubr (&Ssleep_for
);
7115 defsubr (&Ssend_string_to_terminal
);
7116 defsubr (&Sinternal_show_cursor
);
7117 defsubr (&Sinternal_show_cursor_p
);
7118 defsubr (&Slast_nonminibuf_frame
);
7121 defsubr (&Sdump_redisplay_history
);
7124 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
7125 staticpro (&frame_and_buffer_state
);
7127 Qdisplay_table
= intern_c_string ("display-table");
7128 staticpro (&Qdisplay_table
);
7129 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
7130 staticpro (&Qredisplay_dont_pause
);
7132 DEFVAR_INT ("baud-rate", &baud_rate
,
7133 doc
: /* *The output baud rate of the terminal.
7134 On most systems, changing this value will affect the amount of padding
7135 and the other strategic decisions made during redisplay. */);
7137 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7138 doc
: /* *Non-nil means invert the entire frame display.
7139 This means everything is in inverse video which otherwise would not be. */);
7141 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7142 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7144 See also `ring-bell-function'. */);
7146 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7147 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7148 A non-nil value is useful if the terminal can automatically preserve
7149 Emacs's frame display when you reenter Emacs.
7150 It is up to you to set this variable if your terminal can do that. */);
7152 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
7153 doc
: /* Name of the window system that Emacs uses for the first frame.
7154 The value is a symbol--for instance, `x' for X windows.
7155 The value is nil if Emacs is using a text-only terminal. */);
7157 DEFVAR_KBOARD ("window-system", Vwindow_system
,
7158 doc
: /* Name of window system through which the selected frame is displayed.
7159 The value is a symbol--for instance, `x' for X windows.
7160 The value is nil if the selected frame is on a text-only-terminal. */);
7162 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7163 doc
: /* The version number of the window system in use.
7164 For X windows, this is 11. */);
7166 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7167 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7169 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7170 doc
: /* Table defining how to output a glyph code to the frame.
7171 If not nil, this is a vector indexed by glyph code to define the glyph.
7172 Each element can be:
7173 integer: a glyph code which this glyph is an alias for.
7174 string: output this glyph using that string (not impl. in X windows).
7175 nil: this glyph mod 524288 is the code of a character to output,
7176 and this glyph / 524288 is the face number (see `face-id') to use
7177 while outputting it. */);
7178 Vglyph_table
= Qnil
;
7180 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7181 doc
: /* Display table to use for buffers that specify none.
7182 See `buffer-display-table' for more information. */);
7183 Vstandard_display_table
= Qnil
;
7185 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7186 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7187 redisplay_dont_pause
= 0;
7189 #if PERIODIC_PREEMPTION_CHECKING
7190 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7191 doc
: /* *The period in seconds between checking for input during redisplay.
7192 If input is detected, redisplay is pre-empted, and the input is processed.
7193 If nil, never pre-empt redisplay. */);
7194 Vredisplay_preemption_period
= make_float (0.10);
7201 Vinitial_window_system
= Qnil
;
7202 Vwindow_system_version
= Qnil
;
7206 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7207 (do not change this comment) */