1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,03,04
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.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 void fake_current_matrices
P_ ((Lisp_Object
));
123 static void redraw_overlapping_rows
P_ ((struct window
*, int));
124 static void redraw_overlapped_rows
P_ ((struct window
*, int));
125 static int count_blanks
P_ ((struct glyph
*, int));
126 static int count_match
P_ ((struct glyph
*, struct glyph
*,
127 struct glyph
*, struct glyph
*));
128 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
129 static void update_frame_line
P_ ((struct frame
*, int));
130 static struct dim allocate_matrices_for_frame_redisplay
131 P_ ((Lisp_Object
, int, int, int, int *));
132 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
133 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
134 static void adjust_frame_glyphs
P_ ((struct frame
*));
135 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
136 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
137 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
138 int, int, struct dim
));
139 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
140 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
144 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
145 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
147 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
149 static struct glyph_pool
*new_glyph_pool
P_ ((void));
150 static void free_glyph_pool
P_ ((struct glyph_pool
*));
151 static void adjust_frame_glyphs_initially
P_ ((void));
152 static void adjust_frame_message_buffer
P_ ((struct frame
*));
153 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
154 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
155 static void build_frame_matrix
P_ ((struct frame
*));
156 void clear_current_matrices
P_ ((struct frame
*));
157 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
159 static void clear_window_matrices
P_ ((struct window
*, int));
160 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
161 static int scrolling_window
P_ ((struct window
*, int));
162 static int update_window_line
P_ ((struct window
*, int, int *));
163 static void update_marginal_area
P_ ((struct window
*, int, int));
164 static int update_text_area
P_ ((struct window
*, int));
165 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
167 static void mirror_make_current
P_ ((struct window
*, int));
168 void check_window_matrix_pointers
P_ ((struct window
*));
170 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
171 struct glyph_matrix
*));
173 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
174 static int update_window_tree
P_ ((struct window
*, int));
175 static int update_window
P_ ((struct window
*, int));
176 static int update_frame_1
P_ ((struct frame
*, int, int));
177 static void set_window_cursor_after_update
P_ ((struct window
*));
178 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
179 struct glyph_row
*, int));
180 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
181 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
182 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
183 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
184 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
185 struct window
*frame_row_to_window
P_ ((struct window
*, int));
188 /* Non-zero means don't pause redisplay for pending input. (This is
189 for debugging and for a future implementation of EDT-like
192 int redisplay_dont_pause
;
194 /* Nonzero upon entry to redisplay means do not assume anything about
195 current contents of actual terminal frame; clear and redraw it. */
199 /* Nonzero means last display completed. Zero means it was preempted. */
201 int display_completed
;
203 /* Lisp variable visible-bell; enables use of screen-flash instead of
208 /* Invert the color of the whole frame, at a low level. */
212 /* Line speed of the terminal. */
216 /* Either nil or a symbol naming the window system under which Emacs
217 creates the first frame. */
219 Lisp_Object Vinitial_window_system
;
221 /* Version number of X windows: 10, 11 or nil. */
223 Lisp_Object Vwindow_system_version
;
225 /* Vector of glyph definitions. Indexed by glyph number, the contents
226 are a string which is how to output the glyph.
228 If Vglyph_table is nil, a glyph is output by using its low 8 bits
231 This is an obsolete feature that is no longer used. The variable
232 is retained for compatibility. */
234 Lisp_Object Vglyph_table
;
236 /* Display table to use for vectors that don't specify their own. */
238 Lisp_Object Vstandard_display_table
;
240 /* Nonzero means reading single-character input with prompt so put
241 cursor on mini-buffer after the prompt. Positive means at end of
242 text in echo area; negative means at beginning of line. */
244 int cursor_in_echo_area
;
246 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
249 /* The currently selected frame. In a single-frame version, this
250 variable always equals the_only_frame. */
252 Lisp_Object selected_frame
;
254 /* A frame which is not just a mini-buffer, or 0 if there are no such
255 frames. This is usually the most recent such frame that was
256 selected. In a single-frame version, this variable always holds
257 the address of the_only_frame. */
259 struct frame
*last_nonminibuf_frame
;
261 /* 1 means SIGWINCH happened when not safe. */
263 int delayed_size_change
;
265 /* 1 means glyph initialization has been completed at startup. */
267 static int glyphs_initialized_initially_p
;
269 /* Updated window if != 0. Set by update_window. */
271 struct window
*updated_window
;
273 /* Glyph row updated in update_window_line, and area that is updated. */
275 struct glyph_row
*updated_row
;
278 /* A glyph for a space. */
280 struct glyph space_glyph
;
282 /* Non-zero means update has been performed directly, so that there's
283 no need for redisplay_internal to do much work. Set by
284 direct_output_for_insert. */
286 int redisplay_performed_directly_p
;
288 /* Counts of allocated structures. These counts serve to diagnose
289 memory leaks and double frees. */
291 int glyph_matrix_count
;
292 int glyph_pool_count
;
294 /* If non-null, the frame whose frame matrices are manipulated. If
295 null, window matrices are worked on. */
297 static struct frame
*frame_matrix_frame
;
299 /* Non-zero means that fonts have been loaded since the last glyph
300 matrix adjustments. Redisplay must stop, and glyph matrices must
301 be adjusted when this flag becomes non-zero during display. The
302 reason fonts can be loaded so late is that fonts of fontsets are
307 /* Convert vpos and hpos from frame to window and vice versa.
308 This may only be used for terminal frames. */
312 static int window_to_frame_vpos
P_ ((struct window
*, int));
313 static int window_to_frame_hpos
P_ ((struct window
*, int));
314 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
315 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
317 /* One element of the ring buffer containing redisplay history
320 struct redisplay_history
322 char trace
[512 + 100];
325 /* The size of the history buffer. */
327 #define REDISPLAY_HISTORY_SIZE 30
329 /* The redisplay history buffer. */
331 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
333 /* Next free entry in redisplay_history. */
335 static int history_idx
;
337 /* A tick that's incremented each time something is added to the
340 static unsigned history_tick
;
342 static void add_frame_display_history
P_ ((struct frame
*, int));
343 static void add_window_display_history
P_ ((struct window
*, char *, int));
346 /* Add to the redisplay history how window W has been displayed.
347 MSG is a trace containing the information how W's glyph matrix
348 has been constructed. PAUSED_P non-zero means that the update
349 has been interrupted for pending input. */
352 add_window_display_history (w
, msg
, paused_p
)
359 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
361 buf
= redisplay_history
[history_idx
].trace
;
364 sprintf (buf
, "%d: window %p (`%s')%s\n",
367 ((BUFFERP (w
->buffer
)
368 && STRINGP (XBUFFER (w
->buffer
)->name
))
369 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
371 paused_p
? " ***paused***" : "");
376 /* Add to the redisplay history that frame F has been displayed.
377 PAUSED_P non-zero means that the update has been interrupted for
381 add_frame_display_history (f
, paused_p
)
387 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
389 buf
= redisplay_history
[history_idx
].trace
;
392 sprintf (buf
, "%d: update frame %p%s",
394 f
, paused_p
? " ***paused***" : "");
398 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
399 Sdump_redisplay_history
, 0, 0, "",
400 doc
: /* Dump redisplay history to stderr. */)
405 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
408 i
= REDISPLAY_HISTORY_SIZE
- 1;
409 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
416 #else /* GLYPH_DEBUG == 0 */
418 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
419 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
421 #endif /* GLYPH_DEBUG == 0 */
424 /* Like bcopy except never gets confused by overlap. Let this be the
425 first function defined in this file, or change emacs.c where the
426 address of this function is used. */
429 safe_bcopy (from
, to
, size
)
434 if (size
<= 0 || from
== to
)
437 /* If the source and destination don't overlap, then bcopy can
438 handle it. If they do overlap, but the destination is lower in
439 memory than the source, we'll assume bcopy can handle that. */
440 if (to
< from
|| from
+ size
<= to
)
441 bcopy (from
, to
, size
);
443 /* Otherwise, we'll copy from the end. */
446 register const char *endf
= from
+ size
;
447 register char *endt
= to
+ size
;
449 /* If TO - FROM is large, then we should break the copy into
450 nonoverlapping chunks of TO - FROM bytes each. However, if
451 TO - FROM is small, then the bcopy function call overhead
452 makes this not worth it. The crossover point could be about
453 anywhere. Since I don't think the obvious copy loop is too
454 bad, I'm trying to err in its favor. */
459 while (endf
!= from
);
471 bcopy (endf
, endt
, to
- from
);
474 /* If SIZE wasn't a multiple of TO - FROM, there will be a
475 little left over. The amount left over is (endt + (to -
476 from)) - to, which is endt - from. */
477 bcopy (from
, to
, endt
- from
);
484 /***********************************************************************
486 ***********************************************************************/
488 /* Allocate and return a glyph_matrix structure. POOL is the glyph
489 pool from which memory for the matrix should be allocated, or null
490 for window-based redisplay where no glyph pools are used. The
491 member `pool' of the glyph matrix structure returned is set to
492 POOL, the structure is otherwise zeroed. */
494 struct glyph_matrix
*
495 new_glyph_matrix (pool
)
496 struct glyph_pool
*pool
;
498 struct glyph_matrix
*result
;
500 /* Allocate and clear. */
501 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
502 bzero (result
, sizeof *result
);
504 /* Increment number of allocated matrices. This count is used
505 to detect memory leaks. */
506 ++glyph_matrix_count
;
508 /* Set pool and return. */
514 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
516 The global counter glyph_matrix_count is decremented when a matrix
517 is freed. If the count gets negative, more structures were freed
518 than allocated, i.e. one matrix was freed more than once or a bogus
519 pointer was passed to this function.
521 If MATRIX->pool is null, this means that the matrix manages its own
522 glyph memory---this is done for matrices on X frames. Freeing the
523 matrix also frees the glyph memory in this case. */
526 free_glyph_matrix (matrix
)
527 struct glyph_matrix
*matrix
;
533 /* Detect the case that more matrices are freed than were
535 if (--glyph_matrix_count
< 0)
538 /* Free glyph memory if MATRIX owns it. */
539 if (matrix
->pool
== NULL
)
540 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
541 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
543 /* Free row structures and the matrix itself. */
544 xfree (matrix
->rows
);
550 /* Return the number of glyphs to reserve for a marginal area of
551 window W. TOTAL_GLYPHS is the number of glyphs in a complete
552 display line of window W. MARGIN gives the width of the marginal
553 area in canonical character units. MARGIN should be an integer
557 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
564 if (NUMBERP (margin
))
566 int width
= XFASTINT (w
->total_cols
);
567 double d
= max (0, XFLOATINT (margin
));
568 d
= min (width
/ 2 - 1, d
);
569 n
= (int) ((double) total_glyphs
/ width
* d
);
578 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
581 W is null if the function is called for a frame glyph matrix.
582 Otherwise it is the window MATRIX is a member of. X and Y are the
583 indices of the first column and row of MATRIX within the frame
584 matrix, if such a matrix exists. They are zero for purely
585 window-based redisplay. DIM is the needed size of the matrix.
587 In window-based redisplay, where no frame matrices exist, glyph
588 matrices manage their own glyph storage. Otherwise, they allocate
589 storage from a common frame glyph pool which can be found in
592 The reason for this memory management strategy is to avoid complete
593 frame redraws if possible. When we allocate from a common pool, a
594 change of the location or size of a sub-matrix within the pool
595 requires a complete redisplay of the frame because we cannot easily
596 make sure that the current matrices of all windows still agree with
597 what is displayed on the screen. While this is usually fast, it
598 leads to screen flickering. */
601 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
603 struct glyph_matrix
*matrix
;
609 int marginal_areas_changed_p
= 0;
610 int header_line_changed_p
= 0;
611 int header_line_p
= 0;
612 int left
= -1, right
= -1;
613 int window_width
= -1, window_height
;
615 /* See if W had a header line that has disappeared now, or vice versa.
619 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
621 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
622 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
624 matrix
->header_line_p
= header_line_p
;
626 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
627 Do nothing if MATRIX' size, position, vscroll, and marginal areas
628 haven't changed. This optimization is important because preserving
629 the matrix means preventing redisplay. */
630 if (matrix
->pool
== NULL
)
632 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
633 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
634 xassert (left
>= 0 && right
>= 0);
635 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
636 || right
!= matrix
->right_margin_glyphs
);
638 if (!marginal_areas_changed_p
640 && !header_line_changed_p
641 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
642 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
643 && matrix
->window_height
== window_height
644 && matrix
->window_vscroll
== w
->vscroll
645 && matrix
->window_width
== window_width
)
649 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
650 if (matrix
->rows_allocated
< dim
.height
)
652 int size
= dim
.height
* sizeof (struct glyph_row
);
653 new_rows
= dim
.height
- matrix
->rows_allocated
;
654 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
655 bzero (matrix
->rows
+ matrix
->rows_allocated
,
656 new_rows
* sizeof *matrix
->rows
);
657 matrix
->rows_allocated
= dim
.height
;
662 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
663 on a frame not using window-based redisplay. Set up pointers for
664 each row into the glyph pool. */
667 xassert (matrix
->pool
->glyphs
);
671 left
= margin_glyphs_to_reserve (w
, dim
.width
,
672 w
->left_margin_cols
);
673 right
= margin_glyphs_to_reserve (w
, dim
.width
,
674 w
->right_margin_cols
);
679 for (i
= 0; i
< dim
.height
; ++i
)
681 struct glyph_row
*row
= &matrix
->rows
[i
];
683 row
->glyphs
[LEFT_MARGIN_AREA
]
684 = (matrix
->pool
->glyphs
685 + (y
+ i
) * matrix
->pool
->ncolumns
689 || row
== matrix
->rows
+ dim
.height
- 1
690 || (row
== matrix
->rows
&& matrix
->header_line_p
))
692 row
->glyphs
[TEXT_AREA
]
693 = row
->glyphs
[LEFT_MARGIN_AREA
];
694 row
->glyphs
[RIGHT_MARGIN_AREA
]
695 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
696 row
->glyphs
[LAST_AREA
]
697 = row
->glyphs
[RIGHT_MARGIN_AREA
];
701 row
->glyphs
[TEXT_AREA
]
702 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
703 row
->glyphs
[RIGHT_MARGIN_AREA
]
704 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
705 row
->glyphs
[LAST_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
710 matrix
->left_margin_glyphs
= left
;
711 matrix
->right_margin_glyphs
= right
;
715 /* If MATRIX->pool is null, MATRIX is responsible for managing
716 its own memory. It is a window matrix for window-based redisplay.
717 Allocate glyph memory from the heap. */
718 if (dim
.width
> matrix
->matrix_w
720 || header_line_changed_p
721 || marginal_areas_changed_p
)
723 struct glyph_row
*row
= matrix
->rows
;
724 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
728 row
->glyphs
[LEFT_MARGIN_AREA
]
729 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
731 * sizeof (struct glyph
)));
733 /* The mode line never has marginal areas. */
734 if (row
== matrix
->rows
+ dim
.height
- 1
735 || (row
== matrix
->rows
&& matrix
->header_line_p
))
737 row
->glyphs
[TEXT_AREA
]
738 = row
->glyphs
[LEFT_MARGIN_AREA
];
739 row
->glyphs
[RIGHT_MARGIN_AREA
]
740 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
741 row
->glyphs
[LAST_AREA
]
742 = row
->glyphs
[RIGHT_MARGIN_AREA
];
746 row
->glyphs
[TEXT_AREA
]
747 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
748 row
->glyphs
[RIGHT_MARGIN_AREA
]
749 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
750 row
->glyphs
[LAST_AREA
]
751 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
757 xassert (left
>= 0 && right
>= 0);
758 matrix
->left_margin_glyphs
= left
;
759 matrix
->right_margin_glyphs
= right
;
762 /* Number of rows to be used by MATRIX. */
763 matrix
->nrows
= dim
.height
;
764 xassert (matrix
->nrows
>= 0);
768 if (matrix
== w
->current_matrix
)
770 /* Mark rows in a current matrix of a window as not having
771 valid contents. It's important to not do this for
772 desired matrices. When Emacs starts, it may already be
773 building desired matrices when this function runs. */
774 if (window_width
< 0)
775 window_width
= window_box_width (w
, -1);
777 /* Optimize the case that only the height has changed (C-x 2,
778 upper window). Invalidate all rows that are no longer part
780 if (!marginal_areas_changed_p
781 && !header_line_changed_p
783 && dim
.width
== matrix
->matrix_w
784 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
785 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
786 && matrix
->window_width
== window_width
)
788 /* Find the last row in the window. */
789 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
790 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
796 /* Window end is invalid, if inside of the rows that
797 are invalidated below. */
798 if (INTEGERP (w
->window_end_vpos
)
799 && XFASTINT (w
->window_end_vpos
) >= i
)
800 w
->window_end_valid
= Qnil
;
802 while (i
< matrix
->nrows
)
803 matrix
->rows
[i
++].enabled_p
= 0;
807 for (i
= 0; i
< matrix
->nrows
; ++i
)
808 matrix
->rows
[i
].enabled_p
= 0;
811 else if (matrix
== w
->desired_matrix
)
813 /* Rows in desired matrices always have to be cleared;
814 redisplay expects this is the case when it runs, so it
815 had better be the case when we adjust matrices between
817 for (i
= 0; i
< matrix
->nrows
; ++i
)
818 matrix
->rows
[i
].enabled_p
= 0;
823 /* Remember last values to be able to optimize frame redraws. */
824 matrix
->matrix_x
= x
;
825 matrix
->matrix_y
= y
;
826 matrix
->matrix_w
= dim
.width
;
827 matrix
->matrix_h
= dim
.height
;
829 /* Record the top y location and height of W at the time the matrix
830 was last adjusted. This is used to optimize redisplay above. */
833 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
834 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
835 matrix
->window_height
= window_height
;
836 matrix
->window_width
= window_width
;
837 matrix
->window_vscroll
= w
->vscroll
;
842 /* Reverse the contents of rows in MATRIX between START and END. The
843 contents of the row at END - 1 end up at START, END - 2 at START +
844 1 etc. This is part of the implementation of rotate_matrix (see
848 reverse_rows (matrix
, start
, end
)
849 struct glyph_matrix
*matrix
;
854 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
856 /* Non-ISO HP/UX compiler doesn't like auto struct
858 struct glyph_row temp
;
859 temp
= matrix
->rows
[i
];
860 matrix
->rows
[i
] = matrix
->rows
[j
];
861 matrix
->rows
[j
] = temp
;
866 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
867 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
868 indices. (Note: this does not copy glyphs, only glyph pointers in
869 row structures are moved around).
871 The algorithm used for rotating the vector was, I believe, first
872 described by Kernighan. See the vector R as consisting of two
873 sub-vectors AB, where A has length BY for BY >= 0. The result
874 after rotating is then BA. Reverse both sub-vectors to get ArBr
875 and reverse the result to get (ArBr)r which is BA. Similar for
879 rotate_matrix (matrix
, first
, last
, by
)
880 struct glyph_matrix
*matrix
;
885 /* Up (rotate left, i.e. towards lower indices). */
887 reverse_rows (matrix
, first
, first
+ by
);
888 reverse_rows (matrix
, first
+ by
, last
);
889 reverse_rows (matrix
, first
, last
);
893 /* Down (rotate right, i.e. towards higher indices). */
894 reverse_rows (matrix
, last
- by
, last
);
895 reverse_rows (matrix
, first
, last
- by
);
896 reverse_rows (matrix
, first
, last
);
901 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
902 with indices START <= index < END. Increment positions by DELTA/
906 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
907 struct glyph_matrix
*matrix
;
908 int start
, end
, delta
, delta_bytes
;
910 /* Check that START and END are reasonable values. */
911 xassert (start
>= 0 && start
<= matrix
->nrows
);
912 xassert (end
>= 0 && end
<= matrix
->nrows
);
913 xassert (start
<= end
);
915 for (; start
< end
; ++start
)
916 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
920 /* Enable a range of rows in glyph matrix MATRIX. START and END are
921 the row indices of the first and last + 1 row to enable. If
922 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
925 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
926 struct glyph_matrix
*matrix
;
930 xassert (start
<= end
);
931 xassert (start
>= 0 && start
< matrix
->nrows
);
932 xassert (end
>= 0 && end
<= matrix
->nrows
);
934 for (; start
< end
; ++start
)
935 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
941 This empties all rows in MATRIX by setting the enabled_p flag for
942 all rows of the matrix to zero. The function prepare_desired_row
943 will eventually really clear a row when it sees one with a zero
946 Resets update hints to defaults value. The only update hint
947 currently present is the flag MATRIX->no_scrolling_p. */
950 clear_glyph_matrix (matrix
)
951 struct glyph_matrix
*matrix
;
955 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
956 matrix
->no_scrolling_p
= 0;
961 /* Shift part of the glyph matrix MATRIX of window W up or down.
962 Increment y-positions in glyph rows between START and END by DY,
963 and recompute their visible height. */
966 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
968 struct glyph_matrix
*matrix
;
973 xassert (start
<= end
);
974 xassert (start
>= 0 && start
< matrix
->nrows
);
975 xassert (end
>= 0 && end
<= matrix
->nrows
);
977 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
978 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
980 for (; start
< end
; ++start
)
982 struct glyph_row
*row
= &matrix
->rows
[start
];
985 row
->visible_height
= row
->height
;
988 row
->visible_height
-= min_y
- row
->y
;
989 if (row
->y
+ row
->height
> max_y
)
990 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
995 /* Mark all rows in current matrices of frame F as invalid. Marking
996 invalid is done by setting enabled_p to zero for all rows in a
1000 clear_current_matrices (f
)
1001 register struct frame
*f
;
1003 /* Clear frame current matrix, if we have one. */
1004 if (f
->current_matrix
)
1005 clear_glyph_matrix (f
->current_matrix
);
1007 /* Clear the matrix of the menu bar window, if such a window exists.
1008 The menu bar window is currently used to display menus on X when
1009 no toolkit support is compiled in. */
1010 if (WINDOWP (f
->menu_bar_window
))
1011 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1013 /* Clear the matrix of the tool-bar window, if any. */
1014 if (WINDOWP (f
->tool_bar_window
))
1015 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1017 /* Clear current window matrices. */
1018 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1019 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1023 /* Clear out all display lines of F for a coming redisplay. */
1026 clear_desired_matrices (f
)
1027 register struct frame
*f
;
1029 if (f
->desired_matrix
)
1030 clear_glyph_matrix (f
->desired_matrix
);
1032 if (WINDOWP (f
->menu_bar_window
))
1033 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1035 if (WINDOWP (f
->tool_bar_window
))
1036 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1038 /* Do it for window matrices. */
1039 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1040 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1044 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1045 non-zero clear desired matrices, otherwise clear current matrices. */
1048 clear_window_matrices (w
, desired_p
)
1054 if (!NILP (w
->hchild
))
1056 xassert (WINDOWP (w
->hchild
));
1057 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1059 else if (!NILP (w
->vchild
))
1061 xassert (WINDOWP (w
->vchild
));
1062 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1067 clear_glyph_matrix (w
->desired_matrix
);
1070 clear_glyph_matrix (w
->current_matrix
);
1071 w
->window_end_valid
= Qnil
;
1075 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1081 /***********************************************************************
1084 See dispextern.h for an overall explanation of glyph rows.
1085 ***********************************************************************/
1087 /* Clear glyph row ROW. Do it in a way that makes it robust against
1088 changes in the glyph_row structure, i.e. addition or removal of
1089 structure members. */
1091 static struct glyph_row null_row
;
1094 clear_glyph_row (row
)
1095 struct glyph_row
*row
;
1097 struct glyph
*p
[1 + LAST_AREA
];
1099 /* Save pointers. */
1100 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1101 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1102 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1103 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1108 /* Restore pointers. */
1109 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1110 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1111 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1112 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1114 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1115 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1116 Redisplay outputs such glyphs, and flickering effects were
1117 the result. This also depended on the contents of memory
1118 returned by xmalloc. If flickering happens again, activate
1119 the code below. If the flickering is gone with that, chances
1120 are that the flickering has the same reason as here. */
1121 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1126 /* Make ROW an empty, enabled row of canonical character height,
1127 in window W starting at y-position Y. */
1130 blank_row (w
, row
, y
)
1132 struct glyph_row
*row
;
1137 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1138 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1140 clear_glyph_row (row
);
1142 row
->ascent
= row
->phys_ascent
= 0;
1143 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1144 row
->visible_height
= row
->height
;
1147 row
->visible_height
-= min_y
- row
->y
;
1148 if (row
->y
+ row
->height
> max_y
)
1149 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1155 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1156 are the amounts by which to change positions. Note that the first
1157 glyph of the text area of a row can have a buffer position even if
1158 the used count of the text area is zero. Such rows display line
1162 increment_row_positions (row
, delta
, delta_bytes
)
1163 struct glyph_row
*row
;
1164 int delta
, delta_bytes
;
1168 /* Increment start and end positions. */
1169 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1170 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1171 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1172 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1174 /* Increment positions in glyphs. */
1175 for (area
= 0; area
< LAST_AREA
; ++area
)
1176 for (i
= 0; i
< row
->used
[area
]; ++i
)
1177 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1178 && row
->glyphs
[area
][i
].charpos
> 0)
1179 row
->glyphs
[area
][i
].charpos
+= delta
;
1181 /* Capture the case of rows displaying a line end. */
1182 if (row
->used
[TEXT_AREA
] == 0
1183 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1184 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1189 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1190 contents, i.e. glyph structure contents are exchanged between A and
1191 B without changing glyph pointers in A and B. */
1194 swap_glyphs_in_rows (a
, b
)
1195 struct glyph_row
*a
, *b
;
1199 for (area
= 0; area
< LAST_AREA
; ++area
)
1201 /* Number of glyphs to swap. */
1202 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1204 /* Start of glyphs in area of row A. */
1205 struct glyph
*glyph_a
= a
->glyphs
[area
];
1207 /* End + 1 of glyphs in area of row A. */
1208 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1210 /* Start of glyphs in area of row B. */
1211 struct glyph
*glyph_b
= b
->glyphs
[area
];
1213 while (glyph_a
< glyph_a_end
)
1215 /* Non-ISO HP/UX compiler doesn't like auto struct
1219 *glyph_a
= *glyph_b
;
1229 /* Exchange pointers to glyph memory between glyph rows A and B. */
1232 swap_glyph_pointers (a
, b
)
1233 struct glyph_row
*a
, *b
;
1236 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1238 struct glyph
*temp
= a
->glyphs
[i
];
1239 a
->glyphs
[i
] = b
->glyphs
[i
];
1240 b
->glyphs
[i
] = temp
;
1245 /* Copy glyph row structure FROM to glyph row structure TO, except
1246 that glyph pointers in the structures are left unchanged. */
1249 copy_row_except_pointers (to
, from
)
1250 struct glyph_row
*to
, *from
;
1252 struct glyph
*pointers
[1 + LAST_AREA
];
1254 /* Save glyph pointers of TO. */
1255 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1257 /* Do a structure assignment. */
1260 /* Restore original pointers of TO. */
1261 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1265 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1266 TO and FROM are left unchanged. Glyph contents are copied from the
1267 glyph memory of FROM to the glyph memory of TO. Increment buffer
1268 positions in row TO by DELTA/ DELTA_BYTES. */
1271 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1272 struct glyph_row
*to
, *from
;
1273 int delta
, delta_bytes
;
1277 /* This is like a structure assignment TO = FROM, except that
1278 glyph pointers in the rows are left unchanged. */
1279 copy_row_except_pointers (to
, from
);
1281 /* Copy glyphs from FROM to TO. */
1282 for (area
= 0; area
< LAST_AREA
; ++area
)
1283 if (from
->used
[area
])
1284 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1285 from
->used
[area
] * sizeof (struct glyph
));
1287 /* Increment buffer positions in TO by DELTA. */
1288 increment_row_positions (to
, delta
, delta_bytes
);
1292 /* Assign glyph row FROM to glyph row TO. This works like a structure
1293 assignment TO = FROM, except that glyph pointers are not copied but
1294 exchanged between TO and FROM. Pointers must be exchanged to avoid
1298 assign_row (to
, from
)
1299 struct glyph_row
*to
, *from
;
1301 swap_glyph_pointers (to
, from
);
1302 copy_row_except_pointers (to
, from
);
1306 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1307 a row in a window matrix, is a slice of the glyph memory of the
1308 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1309 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1310 memory of FRAME_ROW. */
1315 glyph_row_slice_p (window_row
, frame_row
)
1316 struct glyph_row
*window_row
, *frame_row
;
1318 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1319 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1320 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1322 return (frame_glyph_start
<= window_glyph_start
1323 && window_glyph_start
< frame_glyph_end
);
1326 #endif /* GLYPH_DEBUG */
1330 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1331 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1332 in WINDOW_MATRIX is found satisfying the condition. */
1334 static struct glyph_row
*
1335 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1336 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1341 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1343 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1344 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1345 frame_matrix
->rows
+ row
))
1348 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1353 /* Prepare ROW for display. Desired rows are cleared lazily,
1354 i.e. they are only marked as to be cleared by setting their
1355 enabled_p flag to zero. When a row is to be displayed, a prior
1356 call to this function really clears it. */
1359 prepare_desired_row (row
)
1360 struct glyph_row
*row
;
1362 if (!row
->enabled_p
)
1364 clear_glyph_row (row
);
1370 /* Return a hash code for glyph row ROW. */
1373 line_hash_code (row
)
1374 struct glyph_row
*row
;
1380 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1381 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1385 int c
= glyph
->u
.ch
;
1386 int face_id
= glyph
->face_id
;
1387 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1389 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1390 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1402 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1403 the number of characters in the line. If must_write_spaces is
1404 zero, leading and trailing spaces are ignored. */
1407 line_draw_cost (matrix
, vpos
)
1408 struct glyph_matrix
*matrix
;
1411 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1412 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1413 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1415 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1416 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1418 /* Ignore trailing and leading spaces if we can. */
1419 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1421 /* Skip from the end over trailing spaces. */
1422 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1425 /* All blank line. */
1429 /* Skip over leading spaces. */
1430 while (CHAR_GLYPH_SPACE_P (*beg
))
1434 /* If we don't have a glyph-table, each glyph is one character,
1435 so return the number of glyphs. */
1436 if (glyph_table_base
== 0)
1440 /* Otherwise, scan the glyphs and accumulate their total length
1445 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1448 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1451 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1461 /* Test two glyph rows A and B for equality. Value is non-zero if A
1462 and B have equal contents. W is the window to which the glyphs
1463 rows A and B belong. It is needed here to test for partial row
1464 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1465 flags of A and B, too. */
1468 row_equal_p (w
, a
, b
, mouse_face_p
)
1470 struct glyph_row
*a
, *b
;
1475 else if (a
->hash
!= b
->hash
)
1479 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1482 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1485 /* Compare glyphs. */
1486 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1488 if (a
->used
[area
] != b
->used
[area
])
1491 a_glyph
= a
->glyphs
[area
];
1492 a_end
= a_glyph
+ a
->used
[area
];
1493 b_glyph
= b
->glyphs
[area
];
1495 while (a_glyph
< a_end
1496 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1497 ++a_glyph
, ++b_glyph
;
1499 if (a_glyph
!= a_end
)
1503 if (a
->fill_line_p
!= b
->fill_line_p
1504 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1505 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1506 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1507 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1508 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1509 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1510 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1511 || a
->overlapped_p
!= b
->overlapped_p
1512 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1513 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1514 /* Different partially visible characters on left margin. */
1516 /* Different height. */
1517 || a
->ascent
!= b
->ascent
1518 || a
->phys_ascent
!= b
->phys_ascent
1519 || a
->phys_height
!= b
->phys_height
1520 || a
->visible_height
!= b
->visible_height
)
1529 /***********************************************************************
1532 See dispextern.h for an overall explanation of glyph pools.
1533 ***********************************************************************/
1535 /* Allocate a glyph_pool structure. The structure returned is
1536 initialized with zeros. The global variable glyph_pool_count is
1537 incremented for each pool allocated. */
1539 static struct glyph_pool
*
1542 struct glyph_pool
*result
;
1544 /* Allocate a new glyph_pool and clear it. */
1545 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1546 bzero (result
, sizeof *result
);
1548 /* For memory leak and double deletion checking. */
1555 /* Free a glyph_pool structure POOL. The function may be called with
1556 a null POOL pointer. The global variable glyph_pool_count is
1557 decremented with every pool structure freed. If this count gets
1558 negative, more structures were freed than allocated, i.e. one
1559 structure must have been freed more than once or a bogus pointer
1560 was passed to free_glyph_pool. */
1563 free_glyph_pool (pool
)
1564 struct glyph_pool
*pool
;
1568 /* More freed than allocated? */
1570 xassert (glyph_pool_count
>= 0);
1572 xfree (pool
->glyphs
);
1578 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1579 columns we need. This function never shrinks a pool. The only
1580 case in which this would make sense, would be when a frame's size
1581 is changed from a large value to a smaller one. But, if someone
1582 does it once, we can expect that he will do it again.
1584 Value is non-zero if the pool changed in a way which makes
1585 re-adjusting window glyph matrices necessary. */
1588 realloc_glyph_pool (pool
, matrix_dim
)
1589 struct glyph_pool
*pool
;
1590 struct dim matrix_dim
;
1595 changed_p
= (pool
->glyphs
== 0
1596 || matrix_dim
.height
!= pool
->nrows
1597 || matrix_dim
.width
!= pool
->ncolumns
);
1599 /* Enlarge the glyph pool. */
1600 needed
= matrix_dim
.width
* matrix_dim
.height
;
1601 if (needed
> pool
->nglyphs
)
1603 int size
= needed
* sizeof (struct glyph
);
1606 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1609 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1610 bzero (pool
->glyphs
, size
);
1613 pool
->nglyphs
= needed
;
1616 /* Remember the number of rows and columns because (a) we use them
1617 to do sanity checks, and (b) the number of columns determines
1618 where rows in the frame matrix start---this must be available to
1619 determine pointers to rows of window sub-matrices. */
1620 pool
->nrows
= matrix_dim
.height
;
1621 pool
->ncolumns
= matrix_dim
.width
;
1628 /***********************************************************************
1630 ***********************************************************************/
1635 /* Flush standard output. This is sometimes useful to call from the debugger.
1636 XXX Maybe this should be changed to flush the current terminal instead of
1647 /* Check that no glyph pointers have been lost in MATRIX. If a
1648 pointer has been lost, e.g. by using a structure assignment between
1649 rows, at least one pointer must occur more than once in the rows of
1653 check_matrix_pointer_lossage (matrix
)
1654 struct glyph_matrix
*matrix
;
1658 for (i
= 0; i
< matrix
->nrows
; ++i
)
1659 for (j
= 0; j
< matrix
->nrows
; ++j
)
1661 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1662 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1666 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1669 matrix_row (matrix
, row
)
1670 struct glyph_matrix
*matrix
;
1673 xassert (matrix
&& matrix
->rows
);
1674 xassert (row
>= 0 && row
< matrix
->nrows
);
1676 /* That's really too slow for normal testing because this function
1677 is called almost everywhere. Although---it's still astonishingly
1678 fast, so it is valuable to have for debugging purposes. */
1680 check_matrix_pointer_lossage (matrix
);
1683 return matrix
->rows
+ row
;
1687 #if 0 /* This function makes invalid assumptions when text is
1688 partially invisible. But it might come handy for debugging
1691 /* Check invariants that must hold for an up to date current matrix of
1695 check_matrix_invariants (w
)
1698 struct glyph_matrix
*matrix
= w
->current_matrix
;
1699 int yb
= window_text_bottom_y (w
);
1700 struct glyph_row
*row
= matrix
->rows
;
1701 struct glyph_row
*last_text_row
= NULL
;
1702 struct buffer
*saved
= current_buffer
;
1703 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1706 /* This can sometimes happen for a fresh window. */
1707 if (matrix
->nrows
< 2)
1710 set_buffer_temp (buffer
);
1712 /* Note: last row is always reserved for the mode line. */
1713 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1714 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1716 struct glyph_row
*next
= row
+ 1;
1718 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1719 last_text_row
= row
;
1721 /* Check that character and byte positions are in sync. */
1722 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1723 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1725 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1726 have such a position temporarily in case of a minibuffer
1727 displaying something like `[Sole completion]' at its end. */
1728 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1729 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1730 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1732 /* Check that end position of `row' is equal to start position
1734 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1736 xassert (MATRIX_ROW_END_CHARPOS (row
)
1737 == MATRIX_ROW_START_CHARPOS (next
));
1738 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1739 == MATRIX_ROW_START_BYTEPOS (next
));
1744 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1745 xassert (w
->desired_matrix
->rows
!= NULL
);
1746 set_buffer_temp (saved
);
1751 #endif /* GLYPH_DEBUG != 0 */
1755 /**********************************************************************
1756 Allocating/ Adjusting Glyph Matrices
1757 **********************************************************************/
1759 /* Allocate glyph matrices over a window tree for a frame-based
1762 X and Y are column/row within the frame glyph matrix where
1763 sub-matrices for the window tree rooted at WINDOW must be
1764 allocated. CH_DIM contains the dimensions of the smallest
1765 character that could be used during display. DIM_ONLY_P non-zero
1766 means that the caller of this function is only interested in the
1767 result matrix dimension, and matrix adjustments should not be
1770 The function returns the total width/height of the sub-matrices of
1771 the window tree. If called on a frame root window, the computation
1772 will take the mini-buffer window into account.
1774 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1776 NEW_LEAF_MATRIX set if any window in the tree did not have a
1777 glyph matrices yet, and
1779 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1780 any window in the tree will be changed or have been changed (see
1783 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1786 Windows are arranged into chains of windows on the same level
1787 through the next fields of window structures. Such a level can be
1788 either a sequence of horizontally adjacent windows from left to
1789 right, or a sequence of vertically adjacent windows from top to
1790 bottom. Each window in a horizontal sequence can be either a leaf
1791 window or a vertical sequence; a window in a vertical sequence can
1792 be either a leaf or a horizontal sequence. All windows in a
1793 horizontal sequence have the same height, and all windows in a
1794 vertical sequence have the same width.
1796 This function uses, for historical reasons, a more general
1797 algorithm to determine glyph matrix dimensions that would be
1800 The matrix height of a horizontal sequence is determined by the
1801 maximum height of any matrix in the sequence. The matrix width of
1802 a horizontal sequence is computed by adding up matrix widths of
1803 windows in the sequence.
1805 |<------- result width ------->|
1806 +---------+----------+---------+ ---
1809 +---------+ | | result height
1814 The matrix width of a vertical sequence is the maximum matrix width
1815 of any window in the sequence. Its height is computed by adding up
1816 matrix heights of windows in the sequence.
1818 |<---- result width -->|
1826 +------------+---------+ |
1829 +------------+---------+ --- */
1831 /* Bit indicating that a new matrix will be allocated or has been
1834 #define NEW_LEAF_MATRIX (1 << 0)
1836 /* Bit indicating that a matrix will or has changed its location or
1839 #define CHANGED_LEAF_MATRIX (1 << 1)
1842 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1843 window_change_flags
)
1847 int *window_change_flags
;
1849 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1851 int wmax
= 0, hmax
= 0;
1855 int in_horz_combination_p
;
1857 /* What combination is WINDOW part of? Compute this once since the
1858 result is the same for all windows in the `next' chain. The
1859 special case of a root window (parent equal to nil) is treated
1860 like a vertical combination because a root window's `next'
1861 points to the mini-buffer window, if any, which is arranged
1862 vertically below other windows. */
1863 in_horz_combination_p
1864 = (!NILP (XWINDOW (window
)->parent
)
1865 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1867 /* For WINDOW and all windows on the same level. */
1870 w
= XWINDOW (window
);
1872 /* Get the dimension of the window sub-matrix for W, depending
1873 on whether this is a combination or a leaf window. */
1874 if (!NILP (w
->hchild
))
1875 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1877 window_change_flags
);
1878 else if (!NILP (w
->vchild
))
1879 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1881 window_change_flags
);
1884 /* If not already done, allocate sub-matrix structures. */
1885 if (w
->desired_matrix
== NULL
)
1887 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1888 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1889 *window_change_flags
|= NEW_LEAF_MATRIX
;
1892 /* Width and height MUST be chosen so that there are no
1893 holes in the frame matrix. */
1894 dim
.width
= required_matrix_width (w
);
1895 dim
.height
= required_matrix_height (w
);
1897 /* Will matrix be re-allocated? */
1898 if (x
!= w
->desired_matrix
->matrix_x
1899 || y
!= w
->desired_matrix
->matrix_y
1900 || dim
.width
!= w
->desired_matrix
->matrix_w
1901 || dim
.height
!= w
->desired_matrix
->matrix_h
1902 || (margin_glyphs_to_reserve (w
, dim
.width
,
1903 w
->right_margin_cols
)
1904 != w
->desired_matrix
->left_margin_glyphs
)
1905 || (margin_glyphs_to_reserve (w
, dim
.width
,
1906 w
->left_margin_cols
)
1907 != w
->desired_matrix
->right_margin_glyphs
))
1908 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1910 /* Actually change matrices, if allowed. Do not consider
1911 CHANGED_LEAF_MATRIX computed above here because the pool
1912 may have been changed which we don't now here. We trust
1913 that we only will be called with DIM_ONLY_P != 0 when
1917 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1918 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1922 /* If we are part of a horizontal combination, advance x for
1923 windows to the right of W; otherwise advance y for windows
1925 if (in_horz_combination_p
)
1930 /* Remember maximum glyph matrix dimensions. */
1931 wmax
= max (wmax
, dim
.width
);
1932 hmax
= max (hmax
, dim
.height
);
1934 /* Next window on same level. */
1937 while (!NILP (window
));
1939 /* Set `total' to the total glyph matrix dimension of this window
1940 level. In a vertical combination, the width is the width of the
1941 widest window; the height is the y we finally reached, corrected
1942 by the y we started with. In a horizontal combination, the total
1943 height is the height of the tallest window, and the width is the
1944 x we finally reached, corrected by the x we started with. */
1945 if (in_horz_combination_p
)
1947 total
.width
= x
- x0
;
1948 total
.height
= hmax
;
1953 total
.height
= y
- y0
;
1960 /* Return the required height of glyph matrices for window W. */
1963 required_matrix_height (w
)
1966 #ifdef HAVE_WINDOW_SYSTEM
1967 struct frame
*f
= XFRAME (w
->frame
);
1969 if (FRAME_WINDOW_P (f
))
1971 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1972 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1973 return (((window_pixel_height
+ ch_height
- 1)
1975 /* One partially visible line at the top and
1976 bottom of the window. */
1978 /* 2 for header and mode line. */
1981 #endif /* HAVE_WINDOW_SYSTEM */
1983 return WINDOW_TOTAL_LINES (w
);
1987 /* Return the required width of glyph matrices for window W. */
1990 required_matrix_width (w
)
1993 #ifdef HAVE_WINDOW_SYSTEM
1994 struct frame
*f
= XFRAME (w
->frame
);
1995 if (FRAME_WINDOW_P (f
))
1997 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1998 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2000 /* Compute number of glyphs needed in a glyph row. */
2001 return (((window_pixel_width
+ ch_width
- 1)
2003 /* 2 partially visible columns in the text area. */
2005 /* One partially visible column at the right
2006 edge of each marginal area. */
2009 #endif /* HAVE_WINDOW_SYSTEM */
2011 return XINT (w
->total_cols
);
2015 /* Allocate window matrices for window-based redisplay. W is the
2016 window whose matrices must be allocated/reallocated. CH_DIM is the
2017 size of the smallest character that could potentially be used on W. */
2020 allocate_matrices_for_window_redisplay (w
)
2025 if (!NILP (w
->vchild
))
2026 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2027 else if (!NILP (w
->hchild
))
2028 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2031 /* W is a leaf window. */
2034 /* If matrices are not yet allocated, allocate them now. */
2035 if (w
->desired_matrix
== NULL
)
2037 w
->desired_matrix
= new_glyph_matrix (NULL
);
2038 w
->current_matrix
= new_glyph_matrix (NULL
);
2041 dim
.width
= required_matrix_width (w
);
2042 dim
.height
= required_matrix_height (w
);
2043 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2044 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2047 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2052 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2053 do it for all frames; otherwise do it just for the given frame.
2054 This function must be called when a new frame is created, its size
2055 changes, or its window configuration changes. */
2061 /* Block input so that expose events and other events that access
2062 glyph matrices are not processed while we are changing them. */
2066 adjust_frame_glyphs (f
);
2069 Lisp_Object tail
, lisp_frame
;
2071 FOR_EACH_FRAME (tail
, lisp_frame
)
2072 adjust_frame_glyphs (XFRAME (lisp_frame
));
2079 /* Adjust frame glyphs when Emacs is initialized.
2081 To be called from init_display.
2083 We need a glyph matrix because redraw will happen soon.
2084 Unfortunately, window sizes on selected_frame are not yet set to
2085 meaningful values. I believe we can assume that there are only two
2086 windows on the frame---the mini-buffer and the root window. Frame
2087 height and width seem to be correct so far. So, set the sizes of
2088 windows to estimated values. */
2091 adjust_frame_glyphs_initially ()
2093 struct frame
*sf
= SELECTED_FRAME ();
2094 struct window
*root
= XWINDOW (sf
->root_window
);
2095 struct window
*mini
= XWINDOW (root
->next
);
2096 int frame_lines
= FRAME_LINES (sf
);
2097 int frame_cols
= FRAME_COLS (sf
);
2098 int top_margin
= FRAME_TOP_MARGIN (sf
);
2100 /* Do it for the root window. */
2101 XSETFASTINT (root
->top_line
, top_margin
);
2102 XSETFASTINT (root
->total_cols
, frame_cols
);
2103 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2105 /* Do it for the mini-buffer window. */
2106 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2107 XSETFASTINT (mini
->total_cols
, frame_cols
);
2108 set_window_height (root
->next
, 1, 0);
2110 adjust_frame_glyphs (sf
);
2111 glyphs_initialized_initially_p
= 1;
2115 /* Allocate/reallocate glyph matrices of a single frame F. */
2118 adjust_frame_glyphs (f
)
2121 if (FRAME_WINDOW_P (f
))
2122 adjust_frame_glyphs_for_window_redisplay (f
);
2124 adjust_frame_glyphs_for_frame_redisplay (f
);
2126 /* Don't forget the message buffer and the buffer for
2127 decode_mode_spec. */
2128 adjust_frame_message_buffer (f
);
2129 adjust_decode_mode_spec_buffer (f
);
2131 f
->glyphs_initialized_p
= 1;
2135 /* In the window tree with root W, build current matrices of leaf
2136 windows from the frame's current matrix. */
2139 fake_current_matrices (window
)
2144 for (; !NILP (window
); window
= w
->next
)
2146 w
= XWINDOW (window
);
2148 if (!NILP (w
->hchild
))
2149 fake_current_matrices (w
->hchild
);
2150 else if (!NILP (w
->vchild
))
2151 fake_current_matrices (w
->vchild
);
2155 struct frame
*f
= XFRAME (w
->frame
);
2156 struct glyph_matrix
*m
= w
->current_matrix
;
2157 struct glyph_matrix
*fm
= f
->current_matrix
;
2159 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2160 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2162 for (i
= 0; i
< m
->matrix_h
; ++i
)
2164 struct glyph_row
*r
= m
->rows
+ i
;
2165 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2167 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2168 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2170 r
->enabled_p
= fr
->enabled_p
;
2173 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2174 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2175 r
->used
[TEXT_AREA
] = (m
->matrix_w
2176 - r
->used
[LEFT_MARGIN_AREA
]
2177 - r
->used
[RIGHT_MARGIN_AREA
]);
2186 /* Save away the contents of frame F's current frame matrix. Value is
2187 a glyph matrix holding the contents of F's current frame matrix. */
2189 static struct glyph_matrix
*
2190 save_current_matrix (f
)
2194 struct glyph_matrix
*saved
;
2196 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2197 bzero (saved
, sizeof *saved
);
2198 saved
->nrows
= f
->current_matrix
->nrows
;
2199 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2200 * sizeof *saved
->rows
);
2201 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2203 for (i
= 0; i
< saved
->nrows
; ++i
)
2205 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2206 struct glyph_row
*to
= saved
->rows
+ i
;
2207 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2208 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2209 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2210 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2217 /* Restore the contents of frame F's current frame matrix from SAVED,
2218 and free memory associated with SAVED. */
2221 restore_current_matrix (f
, saved
)
2223 struct glyph_matrix
*saved
;
2227 for (i
= 0; i
< saved
->nrows
; ++i
)
2229 struct glyph_row
*from
= saved
->rows
+ i
;
2230 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2231 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2232 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2233 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2234 xfree (from
->glyphs
[TEXT_AREA
]);
2237 xfree (saved
->rows
);
2243 /* Allocate/reallocate glyph matrices of a single frame F for
2244 frame-based redisplay. */
2247 adjust_frame_glyphs_for_frame_redisplay (f
)
2251 struct dim matrix_dim
;
2253 int window_change_flags
;
2256 if (!FRAME_LIVE_P (f
))
2259 /* Determine the smallest character in any font for F. On
2260 console windows, all characters have dimension (1, 1). */
2261 ch_dim
.width
= ch_dim
.height
= 1;
2263 top_window_y
= FRAME_TOP_MARGIN (f
);
2265 /* Allocate glyph pool structures if not already done. */
2266 if (f
->desired_pool
== NULL
)
2268 f
->desired_pool
= new_glyph_pool ();
2269 f
->current_pool
= new_glyph_pool ();
2272 /* Allocate frames matrix structures if needed. */
2273 if (f
->desired_matrix
== NULL
)
2275 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2276 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2279 /* Compute window glyph matrices. (This takes the mini-buffer
2280 window into account). The result is the size of the frame glyph
2281 matrix needed. The variable window_change_flags is set to a bit
2282 mask indicating whether new matrices will be allocated or
2283 existing matrices change their size or location within the frame
2285 window_change_flags
= 0;
2287 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2290 &window_change_flags
);
2292 /* Add in menu bar lines, if any. */
2293 matrix_dim
.height
+= top_window_y
;
2295 /* Enlarge pools as necessary. */
2296 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2297 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2299 /* Set up glyph pointers within window matrices. Do this only if
2300 absolutely necessary since it requires a frame redraw. */
2301 if (pool_changed_p
|| window_change_flags
)
2303 /* Do it for window matrices. */
2304 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2306 &window_change_flags
);
2308 /* Size of frame matrices must equal size of frame. Note
2309 that we are called for X frames with window widths NOT equal
2310 to the frame width (from CHANGE_FRAME_SIZE_1). */
2311 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2312 && matrix_dim
.height
== FRAME_LINES (f
));
2314 /* Pointers to glyph memory in glyph rows are exchanged during
2315 the update phase of redisplay, which means in general that a
2316 frame's current matrix consists of pointers into both the
2317 desired and current glyph pool of the frame. Adjusting a
2318 matrix sets the frame matrix up so that pointers are all into
2319 the same pool. If we want to preserve glyph contents of the
2320 current matrix over a call to adjust_glyph_matrix, we must
2321 make a copy of the current glyphs, and restore the current
2322 matrix' contents from that copy. */
2323 if (display_completed
2324 && !FRAME_GARBAGED_P (f
)
2325 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2326 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2328 struct glyph_matrix
*copy
= save_current_matrix (f
);
2329 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2330 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2331 restore_current_matrix (f
, copy
);
2332 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2336 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2337 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2338 SET_FRAME_GARBAGED (f
);
2344 /* Allocate/reallocate glyph matrices of a single frame F for
2345 window-based redisplay. */
2348 adjust_frame_glyphs_for_window_redisplay (f
)
2354 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2356 /* Get minimum sizes. */
2357 #ifdef HAVE_WINDOW_SYSTEM
2358 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2359 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2361 ch_dim
.width
= ch_dim
.height
= 1;
2364 /* Allocate/reallocate window matrices. */
2365 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2367 /* Allocate/ reallocate matrices of the dummy window used to display
2368 the menu bar under X when no X toolkit support is available. */
2369 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2371 /* Allocate a dummy window if not already done. */
2372 if (NILP (f
->menu_bar_window
))
2374 f
->menu_bar_window
= make_window ();
2375 w
= XWINDOW (f
->menu_bar_window
);
2376 XSETFRAME (w
->frame
, f
);
2377 w
->pseudo_window_p
= 1;
2380 w
= XWINDOW (f
->menu_bar_window
);
2382 /* Set window dimensions to frame dimensions and allocate or
2383 adjust glyph matrices of W. */
2384 XSETFASTINT (w
->top_line
, 0);
2385 XSETFASTINT (w
->left_col
, 0);
2386 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2387 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2388 allocate_matrices_for_window_redisplay (w
);
2390 #endif /* not USE_X_TOOLKIT */
2393 /* Allocate/ reallocate matrices of the tool bar window. If we
2394 don't have a tool bar window yet, make one. */
2395 if (NILP (f
->tool_bar_window
))
2397 f
->tool_bar_window
= make_window ();
2398 w
= XWINDOW (f
->tool_bar_window
);
2399 XSETFRAME (w
->frame
, f
);
2400 w
->pseudo_window_p
= 1;
2403 w
= XWINDOW (f
->tool_bar_window
);
2405 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2406 XSETFASTINT (w
->left_col
, 0);
2407 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2408 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2409 allocate_matrices_for_window_redisplay (w
);
2414 /* Adjust/ allocate message buffer of frame F.
2416 Note that the message buffer is never freed. Since I could not
2417 find a free in 19.34, I assume that freeing it would be
2418 problematic in some way and don't do it either.
2420 (Implementation note: It should be checked if we can free it
2421 eventually without causing trouble). */
2424 adjust_frame_message_buffer (f
)
2427 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2429 if (FRAME_MESSAGE_BUF (f
))
2431 char *buffer
= FRAME_MESSAGE_BUF (f
);
2432 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2433 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2436 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2440 /* Re-allocate buffer for decode_mode_spec on frame F. */
2443 adjust_decode_mode_spec_buffer (f
)
2446 f
->decode_mode_spec_buffer
2447 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2448 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2453 /**********************************************************************
2454 Freeing Glyph Matrices
2455 **********************************************************************/
2457 /* Free glyph memory for a frame F. F may be null. This function can
2458 be called for the same frame more than once. The root window of
2459 F may be nil when this function is called. This is the case when
2460 the function is called when F is destroyed. */
2466 if (f
&& f
->glyphs_initialized_p
)
2468 /* Block interrupt input so that we don't get surprised by an X
2469 event while we're in an inconsistent state. */
2471 f
->glyphs_initialized_p
= 0;
2473 /* Release window sub-matrices. */
2474 if (!NILP (f
->root_window
))
2475 free_window_matrices (XWINDOW (f
->root_window
));
2477 /* Free the dummy window for menu bars without X toolkit and its
2479 if (!NILP (f
->menu_bar_window
))
2481 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2482 free_glyph_matrix (w
->desired_matrix
);
2483 free_glyph_matrix (w
->current_matrix
);
2484 w
->desired_matrix
= w
->current_matrix
= NULL
;
2485 f
->menu_bar_window
= Qnil
;
2488 /* Free the tool bar window and its glyph matrices. */
2489 if (!NILP (f
->tool_bar_window
))
2491 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2492 free_glyph_matrix (w
->desired_matrix
);
2493 free_glyph_matrix (w
->current_matrix
);
2494 w
->desired_matrix
= w
->current_matrix
= NULL
;
2495 f
->tool_bar_window
= Qnil
;
2498 /* Release frame glyph matrices. Reset fields to zero in
2499 case we are called a second time. */
2500 if (f
->desired_matrix
)
2502 free_glyph_matrix (f
->desired_matrix
);
2503 free_glyph_matrix (f
->current_matrix
);
2504 f
->desired_matrix
= f
->current_matrix
= NULL
;
2507 /* Release glyph pools. */
2508 if (f
->desired_pool
)
2510 free_glyph_pool (f
->desired_pool
);
2511 free_glyph_pool (f
->current_pool
);
2512 f
->desired_pool
= f
->current_pool
= NULL
;
2520 /* Free glyph sub-matrices in the window tree rooted at W. This
2521 function may be called with a null pointer, and it may be called on
2522 the same tree more than once. */
2525 free_window_matrices (w
)
2530 if (!NILP (w
->hchild
))
2531 free_window_matrices (XWINDOW (w
->hchild
));
2532 else if (!NILP (w
->vchild
))
2533 free_window_matrices (XWINDOW (w
->vchild
));
2536 /* This is a leaf window. Free its memory and reset fields
2537 to zero in case this function is called a second time for
2539 free_glyph_matrix (w
->current_matrix
);
2540 free_glyph_matrix (w
->desired_matrix
);
2541 w
->current_matrix
= w
->desired_matrix
= NULL
;
2544 /* Next window on same level. */
2545 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2550 /* Check glyph memory leaks. This function is called from
2551 shut_down_emacs. Note that frames are not destroyed when Emacs
2552 exits. We therefore free all glyph memory for all active frames
2553 explicitly and check that nothing is left allocated. */
2556 check_glyph_memory ()
2558 Lisp_Object tail
, frame
;
2560 /* Free glyph memory for all frames. */
2561 FOR_EACH_FRAME (tail
, frame
)
2562 free_glyphs (XFRAME (frame
));
2564 /* Check that nothing is left allocated. */
2565 if (glyph_matrix_count
)
2567 if (glyph_pool_count
)
2573 /**********************************************************************
2574 Building a Frame Matrix
2575 **********************************************************************/
2577 /* Most of the redisplay code works on glyph matrices attached to
2578 windows. This is a good solution most of the time, but it is not
2579 suitable for terminal code. Terminal output functions cannot rely
2580 on being able to set an arbitrary terminal window. Instead they
2581 must be provided with a view of the whole frame, i.e. the whole
2582 screen. We build such a view by constructing a frame matrix from
2583 window matrices in this section.
2585 Windows that must be updated have their must_be_update_p flag set.
2586 For all such windows, their desired matrix is made part of the
2587 desired frame matrix. For other windows, their current matrix is
2588 made part of the desired frame matrix.
2590 +-----------------+----------------+
2591 | desired | desired |
2593 +-----------------+----------------+
2596 +----------------------------------+
2598 Desired window matrices can be made part of the frame matrix in a
2599 cheap way: We exploit the fact that the desired frame matrix and
2600 desired window matrices share their glyph memory. This is not
2601 possible for current window matrices. Their glyphs are copied to
2602 the desired frame matrix. The latter is equivalent to
2603 preserve_other_columns in the old redisplay.
2605 Used glyphs counters for frame matrix rows are the result of adding
2606 up glyph lengths of the window matrices. A line in the frame
2607 matrix is enabled, if a corresponding line in a window matrix is
2610 After building the desired frame matrix, it will be passed to
2611 terminal code, which will manipulate both the desired and current
2612 frame matrix. Changes applied to the frame's current matrix have
2613 to be visible in current window matrices afterwards, of course.
2615 This problem is solved like this:
2617 1. Window and frame matrices share glyphs. Window matrices are
2618 constructed in a way that their glyph contents ARE the glyph
2619 contents needed in a frame matrix. Thus, any modification of
2620 glyphs done in terminal code will be reflected in window matrices
2623 2. Exchanges of rows in a frame matrix done by terminal code are
2624 intercepted by hook functions so that corresponding row operations
2625 on window matrices can be performed. This is necessary because we
2626 use pointers to glyphs in glyph row structures. To satisfy the
2627 assumption of point 1 above that glyphs are updated implicitly in
2628 window matrices when they are manipulated via the frame matrix,
2629 window and frame matrix must of course agree where to find the
2630 glyphs for their rows. Possible manipulations that must be
2631 mirrored are assignments of rows of the desired frame matrix to the
2632 current frame matrix and scrolling the current frame matrix. */
2634 /* Build frame F's desired matrix from window matrices. Only windows
2635 which have the flag must_be_updated_p set have to be updated. Menu
2636 bar lines of a frame are not covered by window matrices, so make
2637 sure not to touch them in this function. */
2640 build_frame_matrix (f
)
2645 /* F must have a frame matrix when this function is called. */
2646 xassert (!FRAME_WINDOW_P (f
));
2648 /* Clear all rows in the frame matrix covered by window matrices.
2649 Menu bar lines are not covered by windows. */
2650 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2651 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2653 /* Build the matrix by walking the window tree. */
2654 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2655 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2659 /* Walk a window tree, building a frame matrix MATRIX from window
2660 matrices. W is the root of a window tree. */
2663 build_frame_matrix_from_window_tree (matrix
, w
)
2664 struct glyph_matrix
*matrix
;
2669 if (!NILP (w
->hchild
))
2670 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2671 else if (!NILP (w
->vchild
))
2672 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2674 build_frame_matrix_from_leaf_window (matrix
, w
);
2676 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2681 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2682 desired frame matrix built. W is a leaf window whose desired or
2683 current matrix is to be added to FRAME_MATRIX. W's flag
2684 must_be_updated_p determines which matrix it contributes to
2685 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2686 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2687 Adding a desired matrix means setting up used counters and such in
2688 frame rows, while adding a current window matrix to FRAME_MATRIX
2689 means copying glyphs. The latter case corresponds to
2690 preserve_other_columns in the old redisplay. */
2693 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2694 struct glyph_matrix
*frame_matrix
;
2697 struct glyph_matrix
*window_matrix
;
2698 int window_y
, frame_y
;
2699 /* If non-zero, a glyph to insert at the right border of W. */
2700 GLYPH right_border_glyph
= 0;
2702 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2703 if (w
->must_be_updated_p
)
2705 window_matrix
= w
->desired_matrix
;
2707 /* Decide whether we want to add a vertical border glyph. */
2708 if (!WINDOW_RIGHTMOST_P (w
))
2710 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2711 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2712 ? XINT (DISP_BORDER_GLYPH (dp
))
2717 window_matrix
= w
->current_matrix
;
2719 /* For all rows in the window matrix and corresponding rows in the
2722 frame_y
= window_matrix
->matrix_y
;
2723 while (window_y
< window_matrix
->nrows
)
2725 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2726 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2727 int current_row_p
= window_matrix
== w
->current_matrix
;
2729 /* Fill up the frame row with spaces up to the left margin of the
2731 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2733 /* Fill up areas in the window matrix row with spaces. */
2734 fill_up_glyph_row_with_spaces (window_row
);
2736 /* If only part of W's desired matrix has been built, and
2737 window_row wasn't displayed, use the corresponding current
2739 if (window_matrix
== w
->desired_matrix
2740 && !window_row
->enabled_p
)
2742 window_row
= w
->current_matrix
->rows
+ window_y
;
2748 /* Copy window row to frame row. */
2749 bcopy (window_row
->glyphs
[0],
2750 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2751 window_matrix
->matrix_w
* sizeof (struct glyph
));
2755 xassert (window_row
->enabled_p
);
2757 /* Only when a desired row has been displayed, we want
2758 the corresponding frame row to be updated. */
2759 frame_row
->enabled_p
= 1;
2761 /* Maybe insert a vertical border between horizontally adjacent
2763 if (right_border_glyph
)
2765 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2766 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2769 /* Window row window_y must be a slice of frame row
2771 xassert (glyph_row_slice_p (window_row
, frame_row
));
2773 /* If rows are in sync, we don't have to copy glyphs because
2774 frame and window share glyphs. */
2777 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2778 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2782 /* Set number of used glyphs in the frame matrix. Since we fill
2783 up with spaces, and visit leaf windows from left to right it
2784 can be done simply. */
2785 frame_row
->used
[TEXT_AREA
]
2786 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2795 /* Add spaces to a glyph row ROW in a window matrix.
2797 Each row has the form:
2799 +---------+-----------------------------+------------+
2800 | left | text | right |
2801 +---------+-----------------------------+------------+
2803 Left and right marginal areas are optional. This function adds
2804 spaces to areas so that there are no empty holes between areas.
2805 In other words: If the right area is not empty, the text area
2806 is filled up with spaces up to the right area. If the text area
2807 is not empty, the left area is filled up.
2809 To be called for frame-based redisplay, only. */
2812 fill_up_glyph_row_with_spaces (row
)
2813 struct glyph_row
*row
;
2815 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2816 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2817 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2821 /* Fill area AREA of glyph row ROW with spaces. To be called for
2822 frame-based redisplay only. */
2825 fill_up_glyph_row_area_with_spaces (row
, area
)
2826 struct glyph_row
*row
;
2829 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2831 struct glyph
*end
= row
->glyphs
[area
+ 1];
2832 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2835 *text
++ = space_glyph
;
2836 row
->used
[area
] = text
- row
->glyphs
[area
];
2841 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2842 reached. In frame matrices only one area, TEXT_AREA, is used. */
2845 fill_up_frame_row_with_spaces (row
, upto
)
2846 struct glyph_row
*row
;
2849 int i
= row
->used
[TEXT_AREA
];
2850 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2853 glyph
[i
++] = space_glyph
;
2855 row
->used
[TEXT_AREA
] = i
;
2860 /**********************************************************************
2861 Mirroring operations on frame matrices in window matrices
2862 **********************************************************************/
2864 /* Set frame being updated via frame-based redisplay to F. This
2865 function must be called before updates to make explicit that we are
2866 working on frame matrices or not. */
2869 set_frame_matrix_frame (f
)
2872 frame_matrix_frame
= f
;
2876 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2877 DESIRED_MATRIX is the desired matrix corresponding to
2878 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2879 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2880 frame_matrix_frame is non-null, this indicates that the exchange is
2881 done in frame matrices, and that we have to perform analogous
2882 operations in window matrices of frame_matrix_frame. */
2885 make_current (desired_matrix
, current_matrix
, row
)
2886 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2889 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2890 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2891 int mouse_face_p
= current_row
->mouse_face_p
;
2893 /* Do current_row = desired_row. This exchanges glyph pointers
2894 between both rows, and does a structure assignment otherwise. */
2895 assign_row (current_row
, desired_row
);
2897 /* Enable current_row to mark it as valid. */
2898 current_row
->enabled_p
= 1;
2899 current_row
->mouse_face_p
= mouse_face_p
;
2901 /* If we are called on frame matrices, perform analogous operations
2902 for window matrices. */
2903 if (frame_matrix_frame
)
2904 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2908 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2909 W's frame which has been made current (by swapping pointers between
2910 current and desired matrix). Perform analogous operations in the
2911 matrices of leaf windows in the window tree rooted at W. */
2914 mirror_make_current (w
, frame_row
)
2920 if (!NILP (w
->hchild
))
2921 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2922 else if (!NILP (w
->vchild
))
2923 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2926 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2927 here because the checks performed in debug mode there
2928 will not allow the conversion. */
2929 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2931 /* If FRAME_ROW is within W, assign the desired row to the
2932 current row (exchanging glyph pointers). */
2933 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2935 struct glyph_row
*current_row
2936 = MATRIX_ROW (w
->current_matrix
, row
);
2937 struct glyph_row
*desired_row
2938 = MATRIX_ROW (w
->desired_matrix
, row
);
2940 if (desired_row
->enabled_p
)
2941 assign_row (current_row
, desired_row
);
2943 swap_glyph_pointers (desired_row
, current_row
);
2944 current_row
->enabled_p
= 1;
2948 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2953 /* Perform row dance after scrolling. We are working on the range of
2954 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2955 including) in MATRIX. COPY_FROM is a vector containing, for each
2956 row I in the range 0 <= I < NLINES, the index of the original line
2957 to move to I. This index is relative to the row range, i.e. 0 <=
2958 index < NLINES. RETAINED_P is a vector containing zero for each
2959 row 0 <= I < NLINES which is empty.
2961 This function is called from do_scrolling and do_direct_scrolling. */
2964 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2966 struct glyph_matrix
*matrix
;
2967 int unchanged_at_top
, nlines
;
2971 /* A copy of original rows. */
2972 struct glyph_row
*old_rows
;
2974 /* Rows to assign to. */
2975 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2979 /* Make a copy of the original rows. */
2980 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2981 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2983 /* Assign new rows, maybe clear lines. */
2984 for (i
= 0; i
< nlines
; ++i
)
2986 int enabled_before_p
= new_rows
[i
].enabled_p
;
2988 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2989 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2990 new_rows
[i
] = old_rows
[copy_from
[i
]];
2991 new_rows
[i
].enabled_p
= enabled_before_p
;
2993 /* RETAINED_P is zero for empty lines. */
2994 if (!retained_p
[copy_from
[i
]])
2995 new_rows
[i
].enabled_p
= 0;
2998 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2999 if (frame_matrix_frame
)
3000 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3001 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3005 /* Synchronize glyph pointers in the current matrix of window W with
3006 the current frame matrix. */
3009 sync_window_with_frame_matrix_rows (w
)
3012 struct frame
*f
= XFRAME (w
->frame
);
3013 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3014 int left
, right
, x
, width
;
3016 /* Preconditions: W must be a leaf window on a tty frame. */
3017 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3018 xassert (!FRAME_WINDOW_P (f
));
3020 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3021 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3022 x
= w
->current_matrix
->matrix_x
;
3023 width
= w
->current_matrix
->matrix_w
;
3025 window_row
= w
->current_matrix
->rows
;
3026 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3027 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3029 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3031 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3032 = frame_row
->glyphs
[0] + x
;
3033 window_row
->glyphs
[TEXT_AREA
]
3034 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3035 window_row
->glyphs
[LAST_AREA
]
3036 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3037 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3038 = window_row
->glyphs
[LAST_AREA
] - right
;
3043 /* Return the window in the window tree rooted in W containing frame
3044 row ROW. Value is null if none is found. */
3047 frame_row_to_window (w
, row
)
3051 struct window
*found
= NULL
;
3055 if (!NILP (w
->hchild
))
3056 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3057 else if (!NILP (w
->vchild
))
3058 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3059 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3060 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3063 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3070 /* Perform a line dance in the window tree rooted at W, after
3071 scrolling a frame matrix in mirrored_line_dance.
3073 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3074 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3075 COPY_FROM is a vector containing, for each row I in the range 0 <=
3076 I < NLINES, the index of the original line to move to I. This
3077 index is relative to the row range, i.e. 0 <= index < NLINES.
3078 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3082 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3084 int unchanged_at_top
, nlines
;
3090 if (!NILP (w
->hchild
))
3091 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3092 nlines
, copy_from
, retained_p
);
3093 else if (!NILP (w
->vchild
))
3094 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3095 nlines
, copy_from
, retained_p
);
3098 /* W is a leaf window, and we are working on its current
3100 struct glyph_matrix
*m
= w
->current_matrix
;
3102 struct glyph_row
*old_rows
;
3104 /* Make a copy of the original rows of matrix m. */
3105 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3106 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3108 for (i
= 0; i
< nlines
; ++i
)
3110 /* Frame relative line assigned to. */
3111 int frame_to
= i
+ unchanged_at_top
;
3113 /* Frame relative line assigned. */
3114 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3116 /* Window relative line assigned to. */
3117 int window_to
= frame_to
- m
->matrix_y
;
3119 /* Window relative line assigned. */
3120 int window_from
= frame_from
- m
->matrix_y
;
3122 /* Is assigned line inside window? */
3123 int from_inside_window_p
3124 = window_from
>= 0 && window_from
< m
->matrix_h
;
3126 /* Is assigned to line inside window? */
3127 int to_inside_window_p
3128 = window_to
>= 0 && window_to
< m
->matrix_h
;
3130 if (from_inside_window_p
&& to_inside_window_p
)
3132 /* Enabled setting before assignment. */
3133 int enabled_before_p
;
3135 /* Do the assignment. The enabled_p flag is saved
3136 over the assignment because the old redisplay did
3138 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3139 m
->rows
[window_to
] = old_rows
[window_from
];
3140 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3142 /* If frame line is empty, window line is empty, too. */
3143 if (!retained_p
[copy_from
[i
]])
3144 m
->rows
[window_to
].enabled_p
= 0;
3146 else if (to_inside_window_p
)
3148 /* A copy between windows. This is an infrequent
3149 case not worth optimizing. */
3150 struct frame
*f
= XFRAME (w
->frame
);
3151 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3153 struct glyph_matrix
*m2
;
3156 w2
= frame_row_to_window (root
, frame_to
);
3157 m2
= w2
->current_matrix
;
3158 m2_from
= frame_from
- m2
->matrix_y
;
3159 copy_row_except_pointers (m
->rows
+ window_to
,
3160 m2
->rows
+ m2_from
);
3162 /* If frame line is empty, window line is empty, too. */
3163 if (!retained_p
[copy_from
[i
]])
3164 m
->rows
[window_to
].enabled_p
= 0;
3167 else if (from_inside_window_p
)
3171 /* If there was a copy between windows, make sure glyph
3172 pointers are in sync with the frame matrix. */
3174 sync_window_with_frame_matrix_rows (w
);
3176 /* Check that no pointers are lost. */
3180 /* Next window on same level. */
3181 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3188 /* Check that window and frame matrices agree about their
3189 understanding where glyphs of the rows are to find. For each
3190 window in the window tree rooted at W, check that rows in the
3191 matrices of leaf window agree with their frame matrices about
3195 check_window_matrix_pointers (w
)
3200 if (!NILP (w
->hchild
))
3201 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3202 else if (!NILP (w
->vchild
))
3203 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3206 struct frame
*f
= XFRAME (w
->frame
);
3207 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3208 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3211 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3216 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3217 a window and FRAME_MATRIX is the corresponding frame matrix. For
3218 each row in WINDOW_MATRIX check that it's a slice of the
3219 corresponding frame row. If it isn't, abort. */
3222 check_matrix_pointers (window_matrix
, frame_matrix
)
3223 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3225 /* Row number in WINDOW_MATRIX. */
3228 /* Row number corresponding to I in FRAME_MATRIX. */
3229 int j
= window_matrix
->matrix_y
;
3231 /* For all rows check that the row in the window matrix is a
3232 slice of the row in the frame matrix. If it isn't we didn't
3233 mirror an operation on the frame matrix correctly. */
3234 while (i
< window_matrix
->nrows
)
3236 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3237 frame_matrix
->rows
+ j
))
3243 #endif /* GLYPH_DEBUG != 0 */
3247 /**********************************************************************
3248 VPOS and HPOS translations
3249 **********************************************************************/
3253 /* Translate vertical position VPOS which is relative to window W to a
3254 vertical position relative to W's frame. */
3257 window_to_frame_vpos (w
, vpos
)
3261 struct frame
*f
= XFRAME (w
->frame
);
3263 xassert (!FRAME_WINDOW_P (f
));
3264 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3265 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3266 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3271 /* Translate horizontal position HPOS which is relative to window W to
3272 a horizontal position relative to W's frame. */
3275 window_to_frame_hpos (w
, hpos
)
3279 struct frame
*f
= XFRAME (w
->frame
);
3281 xassert (!FRAME_WINDOW_P (f
));
3282 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3286 #endif /* GLYPH_DEBUG */
3290 /**********************************************************************
3292 **********************************************************************/
3294 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3295 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3301 CHECK_LIVE_FRAME (frame
);
3304 /* Ignore redraw requests, if frame has no glyphs yet.
3305 (Implementation note: It still has to be checked why we are
3306 called so early here). */
3307 if (!glyphs_initialized_initially_p
)
3312 if (FRAME_MSDOS_P (f
))
3313 set_terminal_modes (FRAME_DISPLAY (f
));
3316 clear_current_matrices (f
);
3318 if (FRAME_TERMCAP_P (f
))
3319 fflush (FRAME_TTY (f
)->output
);
3320 windows_or_buffers_changed
++;
3321 /* Mark all windows as inaccurate, so that every window will have
3322 its redisplay done. */
3323 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3324 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3330 /* Redraw frame F. This is nothing more than a call to the Lisp
3331 function redraw-frame. */
3338 XSETFRAME (frame
, f
);
3339 Fredraw_frame (frame
);
3343 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3344 doc
: /* Clear and redisplay all visible frames. */)
3347 Lisp_Object tail
, frame
;
3349 FOR_EACH_FRAME (tail
, frame
)
3350 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3351 Fredraw_frame (frame
);
3357 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3358 visible frames marked as garbaged. */
3361 redraw_garbaged_frames ()
3363 Lisp_Object tail
, frame
;
3365 FOR_EACH_FRAME (tail
, frame
)
3366 if (FRAME_VISIBLE_P (XFRAME (frame
))
3367 && FRAME_GARBAGED_P (XFRAME (frame
)))
3368 Fredraw_frame (frame
);
3373 /***********************************************************************
3375 ***********************************************************************/
3377 /* Try to update display and current glyph matrix directly.
3379 This function is called after a character G has been inserted into
3380 current_buffer. It tries to update the current glyph matrix and
3381 perform appropriate screen output to reflect the insertion. If it
3382 succeeds, the global flag redisplay_performed_directly_p will be
3383 set to 1, and thereby prevent the more costly general redisplay
3384 from running (see redisplay_internal).
3386 This function is not called for `hairy' character insertions.
3387 In particular, it is not called when after or before change
3388 functions exist, like they are used by font-lock. See keyboard.c
3389 for details where this function is called. */
3392 direct_output_for_insert (g
)
3395 register struct frame
*f
= SELECTED_FRAME ();
3396 struct window
*w
= XWINDOW (selected_window
);
3398 struct glyph_row
*glyph_row
;
3399 struct glyph
*glyphs
, *glyph
, *end
;
3401 /* Non-null means that redisplay of W is based on window matrices. */
3402 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3403 /* Non-null means we are in overwrite mode. */
3404 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3406 struct text_pos pos
;
3407 int delta
, delta_bytes
;
3409 /* Not done directly. */
3410 redisplay_performed_directly_p
= 0;
3412 /* Quickly give up for some common cases. */
3413 if (cursor_in_echo_area
3414 /* Give up if fonts have changed. */
3416 /* Give up if face attributes have been changed. */
3417 || face_change_count
3418 /* Give up if cursor position not really known. */
3419 || !display_completed
3420 /* Give up if buffer appears in two places. */
3421 || buffer_shared
> 1
3422 /* Give up if currently displaying a message instead of the
3423 minibuffer contents. */
3424 || (EQ (selected_window
, minibuf_window
)
3425 && EQ (minibuf_window
, echo_area_window
))
3426 /* Give up for hscrolled mini-buffer because display of the prompt
3427 is handled specially there (see display_line). */
3428 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3429 /* Give up if overwriting in the middle of a line. */
3432 && FETCH_BYTE (PT
) != '\n')
3433 /* Give up for tabs and line ends. */
3437 /* Give up if unable to display the cursor in the window. */
3438 || w
->cursor
.vpos
< 0
3439 /* Give up if we are showing a message or just cleared the message
3440 because we might need to resize the echo area window. */
3441 || !NILP (echo_area_buffer
[0])
3442 || !NILP (echo_area_buffer
[1])
3443 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3444 /* Can't do it in a continued line because continuation
3445 lines would change. */
3446 (glyph_row
->continued_p
3447 || glyph_row
->exact_window_width_line_p
3448 /* Can't use this method if the line overlaps others or is
3449 overlapped by others because these other lines would
3450 have to be redisplayed. */
3451 || glyph_row
->overlapping_p
3452 || glyph_row
->overlapped_p
))
3453 /* Can't do it for partial width windows on terminal frames
3454 because we can't clear to eol in such a window. */
3455 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3458 /* If we can't insert glyphs, we can use this method only
3459 at the end of a line. */
3460 if (!FRAME_CHAR_INS_DEL_OK (f
))
3461 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3464 /* Set up a display iterator structure for W. Glyphs will be
3465 produced in scratch_glyph_row. Current position is W's cursor
3467 clear_glyph_row (&scratch_glyph_row
);
3468 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3469 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3470 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3473 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3474 if (glyph_row
->mouse_face_p
)
3477 /* Give up if highlighting trailing whitespace and we have trailing
3478 whitespace in glyph_row. We would have to remove the trailing
3479 whitespace face in that case. */
3480 if (!NILP (Vshow_trailing_whitespace
)
3481 && glyph_row
->used
[TEXT_AREA
])
3485 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3486 if (last
->type
== STRETCH_GLYPH
3487 || (last
->type
== CHAR_GLYPH
3488 && last
->u
.ch
== ' '))
3492 /* Give up if there are overlay strings at pos. This would fail
3493 if the overlay string has newlines in it. */
3494 if (STRINGP (it
.string
))
3497 it
.hpos
= w
->cursor
.hpos
;
3498 it
.vpos
= w
->cursor
.vpos
;
3499 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3500 it
.current_y
= w
->cursor
.y
;
3501 it
.end_charpos
= PT
;
3502 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3503 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3505 /* More than one display element may be returned for PT - 1 if
3506 (i) it's a control character which is translated into `\003' or
3507 `^C', or (ii) it has a display table entry, or (iii) it's a
3508 combination of both. */
3509 delta
= delta_bytes
= 0;
3510 while (get_next_display_element (&it
))
3512 PRODUCE_GLYPHS (&it
);
3514 /* Give up if glyph doesn't fit completely on the line. */
3515 if (it
.current_x
>= it
.last_visible_x
)
3518 /* Give up if new glyph has different ascent or descent than
3519 the original row, or if it is not a character glyph. */
3520 if (glyph_row
->ascent
!= it
.ascent
3521 || glyph_row
->height
!= it
.ascent
+ it
.descent
3522 || glyph_row
->phys_ascent
!= it
.phys_ascent
3523 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3524 || it
.what
!= IT_CHARACTER
)
3528 delta_bytes
+= it
.len
;
3529 set_iterator_to_next (&it
, 1);
3532 /* Give up if we hit the right edge of the window. We would have
3533 to insert truncation or continuation glyphs. */
3534 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3535 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3538 /* Give up if there is a \t following in the line. */
3540 it2
.end_charpos
= ZV
;
3541 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3542 while (get_next_display_element (&it2
)
3543 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3547 set_iterator_to_next (&it2
, 1);
3550 /* Number of new glyphs produced. */
3551 n
= it
.glyph_row
->used
[TEXT_AREA
];
3553 /* Start and end of glyphs in original row. */
3554 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3555 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3557 /* Make room for new glyphs, then insert them. */
3558 xassert (end
- glyphs
- n
>= 0);
3559 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3560 (end
- glyphs
- n
) * sizeof (*end
));
3561 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3562 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3563 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3565 /* Compute new line width. */
3566 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3567 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3568 glyph_row
->pixel_width
= glyph_row
->x
;
3571 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3575 /* Increment buffer positions for glyphs following the newly
3577 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3578 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3579 glyph
->charpos
+= delta
;
3581 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3583 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3584 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3587 /* Adjust positions in lines following the one we are in. */
3588 increment_matrix_positions (w
->current_matrix
,
3590 w
->current_matrix
->nrows
,
3591 delta
, delta_bytes
);
3593 glyph_row
->contains_overlapping_glyphs_p
3594 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3596 glyph_row
->displays_text_p
= 1;
3597 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3598 XFASTINT (w
->window_end_vpos
)));
3600 if (!NILP (Vshow_trailing_whitespace
))
3601 highlight_trailing_whitespace (it
.f
, glyph_row
);
3603 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3604 In the middle, we have to insert glyphs. Note that this is now
3605 implemented for X frames. The implementation uses updated_window
3607 updated_row
= glyph_row
;
3608 updated_area
= TEXT_AREA
;
3612 FRAME_RIF (f
)->update_window_begin_hook (w
);
3614 if (glyphs
== end
- n
3615 /* In front of a space added by append_space. */
3616 || (glyphs
== end
- n
- 1
3617 && (end
- n
)->charpos
<= 0))
3618 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3620 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3624 if (glyphs
== end
- n
)
3625 write_glyphs (glyphs
, n
);
3627 insert_glyphs (glyphs
, n
);
3630 w
->cursor
.hpos
+= n
;
3631 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3632 xassert (w
->cursor
.hpos
>= 0
3633 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3635 /* How to set the cursor differs depending on whether we are
3636 using a frame matrix or a window matrix. Note that when
3637 a frame matrix is used, cursor_to expects frame coordinates,
3638 and the X and Y parameters are not used. */
3639 if (window_redisplay_p
)
3640 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3641 w
->cursor
.y
, w
->cursor
.x
);
3645 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3646 + (INTEGERP (w
->left_margin_cols
)
3647 ? XFASTINT (w
->left_margin_cols
)
3649 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3653 #ifdef HAVE_WINDOW_SYSTEM
3654 update_window_fringes (w
, 0);
3658 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3661 if (FRAME_TERMCAP_P (f
))
3662 fflush (FRAME_TTY (f
)->output
);
3664 TRACE ((stderr
, "direct output for insert\n"));
3665 mark_window_display_accurate (it
.window
, 1);
3666 redisplay_performed_directly_p
= 1;
3671 /* Perform a direct display update for moving PT by N positions
3672 left or right. N < 0 means a movement backwards. This function
3673 is currently only called for N == 1 or N == -1. */
3676 direct_output_forward_char (n
)
3679 struct frame
*f
= SELECTED_FRAME ();
3680 struct window
*w
= XWINDOW (selected_window
);
3681 struct glyph_row
*row
;
3683 /* Give up if point moved out of or into a composition. */
3684 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3685 current_buffer
, PT
))
3688 /* Give up if face attributes have been changed. */
3689 if (face_change_count
)
3692 /* Give up if current matrix is not up to date or we are
3693 displaying a message. */
3694 if (!display_completed
|| cursor_in_echo_area
)
3697 /* Give up if the buffer's direction is reversed. */
3698 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3701 /* Can't use direct output if highlighting a region. */
3702 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3705 /* Can't use direct output if highlighting trailing whitespace. */
3706 if (!NILP (Vshow_trailing_whitespace
))
3709 /* Give up if we are showing a message or just cleared the message
3710 because we might need to resize the echo area window. */
3711 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3714 /* Give up if currently displaying a message instead of the
3715 minibuffer contents. */
3716 if (XWINDOW (minibuf_window
) == w
3717 && EQ (minibuf_window
, echo_area_window
))
3720 /* Give up if we don't know where the cursor is. */
3721 if (w
->cursor
.vpos
< 0)
3724 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3726 /* Give up if PT is outside of the last known cursor row. */
3727 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3728 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3731 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3733 w
->last_cursor
= w
->cursor
;
3734 XSETFASTINT (w
->last_point
, PT
);
3736 xassert (w
->cursor
.hpos
>= 0
3737 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3739 if (FRAME_WINDOW_P (f
))
3740 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3741 w
->cursor
.y
, w
->cursor
.x
);
3745 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3746 + (INTEGERP (w
->left_margin_cols
)
3747 ? XFASTINT (w
->left_margin_cols
)
3749 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3753 if (FRAME_TERMCAP_P (f
))
3754 fflush (FRAME_TTY (f
)->output
);
3755 redisplay_performed_directly_p
= 1;
3761 /***********************************************************************
3763 ***********************************************************************/
3765 /* Update frame F based on the data in desired matrices.
3767 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3768 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3771 Value is non-zero if redisplay was stopped due to pending input. */
3774 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3777 int inhibit_hairy_id_p
;
3779 /* 1 means display has been paused because of pending input. */
3781 struct window
*root_window
= XWINDOW (f
->root_window
);
3783 if (FRAME_WINDOW_P (f
))
3785 /* We are working on window matrix basis. All windows whose
3786 flag must_be_updated_p is set have to be updated. */
3788 /* Record that we are not working on frame matrices. */
3789 set_frame_matrix_frame (NULL
);
3791 /* Update all windows in the window tree of F, maybe stopping
3792 when pending input is detected. */
3795 /* Update the menu bar on X frames that don't have toolkit
3797 if (WINDOWP (f
->menu_bar_window
))
3798 update_window (XWINDOW (f
->menu_bar_window
), 1);
3800 /* Update the tool-bar window, if present. */
3801 if (WINDOWP (f
->tool_bar_window
))
3803 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3805 /* Update tool-bar window. */
3806 if (w
->must_be_updated_p
)
3810 update_window (w
, 1);
3811 w
->must_be_updated_p
= 0;
3813 /* Swap tool-bar strings. We swap because we want to
3815 tem
= f
->current_tool_bar_string
;
3816 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3817 f
->desired_tool_bar_string
= tem
;
3822 /* Update windows. */
3823 paused_p
= update_window_tree (root_window
, force_p
);
3826 /* This flush is a performance bottleneck under X,
3827 and it doesn't seem to be necessary anyway (in general).
3828 It is necessary when resizing the window with the mouse, or
3829 at least the fringes are not redrawn in a timely manner. ++kfs */
3830 if (f
->force_flush_display_p
)
3832 FRAME_RIF (f
)->flush_display (f
);
3833 f
->force_flush_display_p
= 0;
3838 /* We are working on frame matrix basis. Set the frame on whose
3839 frame matrix we operate. */
3840 set_frame_matrix_frame (f
);
3842 /* Build F's desired matrix from window matrices. */
3843 build_frame_matrix (f
);
3845 /* Update the display */
3847 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3850 if (FRAME_TERMCAP_P (f
))
3852 if (FRAME_TTY (f
)->termscript
)
3853 fflush (FRAME_TTY (f
)->termscript
);
3854 fflush (FRAME_TTY (f
)->output
);
3857 /* Check window matrices for lost pointers. */
3859 check_window_matrix_pointers (root_window
);
3860 add_frame_display_history (f
, paused_p
);
3864 /* Reset flags indicating that a window should be updated. */
3865 set_window_update_flags (root_window
, 0);
3867 display_completed
= !paused_p
;
3873 /************************************************************************
3874 Window-based updates
3875 ************************************************************************/
3877 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3878 don't stop updating when input is pending. */
3881 update_window_tree (w
, force_p
)
3887 while (w
&& !paused_p
)
3889 if (!NILP (w
->hchild
))
3890 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3891 else if (!NILP (w
->vchild
))
3892 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3893 else if (w
->must_be_updated_p
)
3894 paused_p
|= update_window (w
, force_p
);
3896 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3903 /* Update window W if its flag must_be_updated_p is non-zero. If
3904 FORCE_P is non-zero, don't stop updating if input is pending. */
3907 update_single_window (w
, force_p
)
3911 if (w
->must_be_updated_p
)
3913 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3915 /* Record that this is not a frame-based redisplay. */
3916 set_frame_matrix_frame (NULL
);
3920 update_window (w
, force_p
);
3923 /* Reset flag in W. */
3924 w
->must_be_updated_p
= 0;
3929 /* Redraw lines from the current matrix of window W that are
3930 overlapped by other rows. YB is bottom-most y-position in W. */
3933 redraw_overlapped_rows (w
, yb
)
3938 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3940 /* If rows overlapping others have been changed, the rows being
3941 overlapped have to be redrawn. This won't draw lines that have
3942 already been drawn in update_window_line because overlapped_p in
3943 desired rows is 0, so after row assignment overlapped_p in
3944 current rows is 0. */
3945 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3947 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3949 if (!row
->enabled_p
)
3951 else if (row
->mode_line_p
)
3954 if (row
->overlapped_p
)
3956 enum glyph_row_area area
;
3958 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3961 updated_area
= area
;
3962 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3963 area
== TEXT_AREA
? row
->x
: 0);
3964 if (row
->used
[area
])
3965 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3967 FRAME_RIF (f
)->clear_end_of_line (-1);
3970 row
->overlapped_p
= 0;
3973 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3979 /* Redraw lines from the current matrix of window W that overlap
3980 others. YB is bottom-most y-position in W. */
3983 redraw_overlapping_rows (w
, yb
)
3988 struct glyph_row
*row
;
3989 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3991 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3993 row
= w
->current_matrix
->rows
+ i
;
3995 if (!row
->enabled_p
)
3997 else if (row
->mode_line_p
)
4000 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4002 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4004 if (row
->used
[LEFT_MARGIN_AREA
])
4005 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
4007 if (row
->used
[TEXT_AREA
])
4008 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
4010 if (row
->used
[RIGHT_MARGIN_AREA
])
4011 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4013 /* Record in neighbour rows that ROW overwrites part of their
4015 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4016 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4017 if ((row
->phys_height
- row
->phys_ascent
4018 > row
->height
- row
->ascent
)
4020 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4031 /* Check that no row in the current matrix of window W is enabled
4032 which is below what's displayed in the window. */
4035 check_current_matrix_flags (w
)
4038 int last_seen_p
= 0;
4039 int i
, yb
= window_text_bottom_y (w
);
4041 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4043 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4044 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4046 else if (last_seen_p
&& row
->enabled_p
)
4051 #endif /* GLYPH_DEBUG */
4054 /* Update display of window W. FORCE_P non-zero means that we should
4055 not stop when detecting pending input. */
4058 update_window (w
, force_p
)
4062 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4064 int preempt_count
= baud_rate
/ 2400 + 1;
4065 extern int input_pending
;
4066 extern Lisp_Object do_mouse_tracking
;
4068 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4070 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4072 /* Check that W's frame doesn't have glyph matrices. */
4073 xassert (FRAME_WINDOW_P (f
));
4074 xassert (updating_frame
!= NULL
);
4076 /* Check pending input the first time so that we can quickly return. */
4077 if (redisplay_dont_pause
)
4080 detect_input_pending ();
4082 /* If forced to complete the update, or if no input is pending, do
4084 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4086 struct glyph_row
*row
, *end
;
4087 struct glyph_row
*mode_line_row
;
4088 struct glyph_row
*header_line_row
;
4089 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4091 rif
->update_window_begin_hook (w
);
4092 yb
= window_text_bottom_y (w
);
4094 /* If window has a header line, update it before everything else.
4095 Adjust y-positions of other rows by the header line height. */
4096 row
= desired_matrix
->rows
;
4097 end
= row
+ desired_matrix
->nrows
- 1;
4099 if (row
->mode_line_p
)
4101 header_line_row
= row
;
4105 header_line_row
= NULL
;
4107 /* Update the mode line, if necessary. */
4108 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4109 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4111 mode_line_row
->y
= yb
;
4112 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4114 &mouse_face_overwritten_p
);
4118 /* Find first enabled row. Optimizations in redisplay_internal
4119 may lead to an update with only one row enabled. There may
4120 be also completely empty matrices. */
4121 while (row
< end
&& !row
->enabled_p
)
4124 /* Try reusing part of the display by copying. */
4125 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4127 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4130 /* All rows were found to be equal. */
4136 /* We've scrolled the display. */
4142 /* Update the rest of the lines. */
4143 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4146 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4149 /* We'll have to play a little bit with when to
4150 detect_input_pending. If it's done too often,
4151 scrolling large windows with repeated scroll-up
4152 commands will too quickly pause redisplay. */
4153 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4154 detect_input_pending ();
4156 changed_p
|= update_window_line (w
, vpos
,
4157 &mouse_face_overwritten_p
);
4159 /* Mark all rows below the last visible one in the current
4160 matrix as invalid. This is necessary because of
4161 variable line heights. Consider the case of three
4162 successive redisplays, where the first displays 5
4163 lines, the second 3 lines, and the third 5 lines again.
4164 If the second redisplay wouldn't mark rows in the
4165 current matrix invalid, the third redisplay might be
4166 tempted to optimize redisplay based on lines displayed
4167 in the first redisplay. */
4168 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4169 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4170 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4173 /* Was display preempted? */
4174 paused_p
= row
< end
;
4178 /* Update the header line after scrolling because a new header
4179 line would otherwise overwrite lines at the top of the window
4180 that can be scrolled. */
4181 if (header_line_row
&& header_line_row
->enabled_p
)
4183 header_line_row
->y
= 0;
4184 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4188 /* Fix the appearance of overlapping/overlapped rows. */
4189 if (!paused_p
&& !w
->pseudo_window_p
)
4191 if (changed_p
&& rif
->fix_overlapping_area
)
4193 redraw_overlapped_rows (w
, yb
);
4194 redraw_overlapping_rows (w
, yb
);
4197 /* Make cursor visible at cursor position of W. */
4198 set_window_cursor_after_update (w
);
4200 #if 0 /* Check that current matrix invariants are satisfied. This is
4201 for debugging only. See the comment of check_matrix_invariants. */
4202 IF_DEBUG (check_matrix_invariants (w
));
4207 /* Remember the redisplay method used to display the matrix. */
4208 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4211 #ifdef HAVE_WINDOW_SYSTEM
4212 update_window_fringes (w
, 0);
4215 /* End the update of window W. Don't set the cursor if we
4216 paused updating the display because in this case,
4217 set_window_cursor_after_update hasn't been called, and
4218 output_cursor doesn't contain the cursor location. */
4219 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4225 /* check_current_matrix_flags (w); */
4226 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4229 clear_glyph_matrix (desired_matrix
);
4235 /* Update the display of area AREA in window W, row number VPOS.
4236 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4239 update_marginal_area (w
, area
, vpos
)
4243 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4244 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4246 /* Let functions in xterm.c know what area subsequent X positions
4247 will be relative to. */
4248 updated_area
= area
;
4250 /* Set cursor to start of glyphs, write them, and clear to the end
4251 of the area. I don't think that something more sophisticated is
4252 necessary here, since marginal areas will not be the default. */
4253 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4254 if (desired_row
->used
[area
])
4255 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4256 rif
->clear_end_of_line (-1);
4260 /* Update the display of the text area of row VPOS in window W.
4261 Value is non-zero if display has changed. */
4264 update_text_area (w
, vpos
)
4268 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4269 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4270 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4273 /* Let functions in xterm.c know what area subsequent X positions
4274 will be relative to. */
4275 updated_area
= TEXT_AREA
;
4277 /* If rows are at different X or Y, or rows have different height,
4278 or the current row is marked invalid, write the entire line. */
4279 if (!current_row
->enabled_p
4280 || desired_row
->y
!= current_row
->y
4281 || desired_row
->ascent
!= current_row
->ascent
4282 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4283 || desired_row
->phys_height
!= current_row
->phys_height
4284 || desired_row
->visible_height
!= current_row
->visible_height
4285 || current_row
->overlapped_p
4286 || current_row
->mouse_face_p
4287 || current_row
->x
!= desired_row
->x
)
4289 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4291 if (desired_row
->used
[TEXT_AREA
])
4292 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4293 desired_row
->used
[TEXT_AREA
]);
4295 /* Clear to end of window. */
4296 rif
->clear_end_of_line (-1);
4299 /* This erases the cursor. We do this here because
4300 notice_overwritten_cursor cannot easily check this, which
4301 might indicate that the whole functionality of
4302 notice_overwritten_cursor would better be implemented here.
4303 On the other hand, we need notice_overwritten_cursor as long
4304 as mouse highlighting is done asynchronously outside of
4306 if (vpos
== w
->phys_cursor
.vpos
)
4307 w
->phys_cursor_on_p
= 0;
4312 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4313 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4314 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4315 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4317 /* If the desired row extends its face to the text area end,
4318 make sure we write at least one glyph, so that the face
4319 extension actually takes place. */
4320 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4323 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4327 /* Loop over glyphs that current and desired row may have
4333 /* Skip over glyphs that both rows have in common. These
4334 don't have to be written. We can't skip if the last
4335 current glyph overlaps the glyph to its right. For
4336 example, consider a current row of `if ' with the `f' in
4337 Courier bold so that it overlaps the ` ' to its right.
4338 If the desired row is ` ', we would skip over the space
4339 after the `if' and there would remain a pixel from the
4340 `f' on the screen. */
4341 if (overlapping_glyphs_p
&& i
> 0)
4343 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4346 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4348 can_skip_p
= right
== 0;
4354 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4356 x
+= desired_glyph
->pixel_width
;
4357 ++desired_glyph
, ++current_glyph
, ++i
;
4360 /* Consider the case that the current row contains "xxx
4361 ppp ggg" in italic Courier font, and the desired row
4362 is "xxx ggg". The character `p' has lbearing, `g'
4363 has not. The loop above will stop in front of the
4364 first `p' in the current row. If we would start
4365 writing glyphs there, we wouldn't erase the lbearing
4366 of the `p'. The rest of the lbearing problem is then
4367 taken care of by draw_glyphs. */
4368 if (overlapping_glyphs_p
4370 && i
< current_row
->used
[TEXT_AREA
]
4371 && (current_row
->used
[TEXT_AREA
]
4372 != desired_row
->used
[TEXT_AREA
]))
4376 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4378 while (left
> 0 && i
> 0)
4380 --i
, --desired_glyph
, --current_glyph
;
4381 x
-= desired_glyph
->pixel_width
;
4382 left
-= desired_glyph
->pixel_width
;
4387 /* Try to avoid writing the entire rest of the desired row
4388 by looking for a resync point. This mainly prevents
4389 mode line flickering in the case the mode line is in
4390 fixed-pitch font, which it usually will be. */
4391 if (i
< desired_row
->used
[TEXT_AREA
])
4393 int start_x
= x
, start_hpos
= i
;
4394 struct glyph
*start
= desired_glyph
;
4396 int skip_first_p
= !can_skip_p
;
4398 /* Find the next glyph that's equal again. */
4401 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4404 x
+= desired_glyph
->pixel_width
;
4405 current_x
+= current_glyph
->pixel_width
;
4406 ++desired_glyph
, ++current_glyph
, ++i
;
4410 if (i
== start_hpos
|| x
!= current_x
)
4414 desired_glyph
= start
;
4418 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4419 rif
->write_glyphs (start
, i
- start_hpos
);
4424 /* Write the rest. */
4425 if (i
< desired_row
->used
[TEXT_AREA
])
4427 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4428 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4432 /* Maybe clear to end of line. */
4433 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4435 /* If new row extends to the end of the text area, nothing
4436 has to be cleared, if and only if we did a write_glyphs
4437 above. This is made sure by setting desired_stop_pos
4438 appropriately above. */
4439 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4441 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4443 /* If old row extends to the end of the text area, clear. */
4444 if (i
>= desired_row
->used
[TEXT_AREA
])
4445 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4446 desired_row
->pixel_width
);
4447 rif
->clear_end_of_line (-1);
4450 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4452 /* Otherwise clear to the end of the old row. Everything
4453 after that position should be clear already. */
4456 if (i
>= desired_row
->used
[TEXT_AREA
])
4457 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4458 desired_row
->pixel_width
);
4460 /* If cursor is displayed at the end of the line, make sure
4461 it's cleared. Nowadays we don't have a phys_cursor_glyph
4462 with which to erase the cursor (because this method
4463 doesn't work with lbearing/rbearing), so we must do it
4465 if (vpos
== w
->phys_cursor
.vpos
4466 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4468 w
->phys_cursor_on_p
= 0;
4472 x
= current_row
->pixel_width
;
4473 rif
->clear_end_of_line (x
);
4482 /* Update row VPOS in window W. Value is non-zero if display has been
4486 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4488 int vpos
, *mouse_face_overwritten_p
;
4490 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4491 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4492 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4495 /* Set the row being updated. This is important to let xterm.c
4496 know what line height values are in effect. */
4497 updated_row
= desired_row
;
4499 /* A row can be completely invisible in case a desired matrix was
4500 built with a vscroll and then make_cursor_line_fully_visible shifts
4501 the matrix. Make sure to make such rows current anyway, since
4502 we need the correct y-position, for example, in the current matrix. */
4503 if (desired_row
->mode_line_p
4504 || desired_row
->visible_height
> 0)
4506 xassert (desired_row
->enabled_p
);
4508 /* Update display of the left margin area, if there is one. */
4509 if (!desired_row
->full_width_p
4510 && !NILP (w
->left_margin_cols
))
4513 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4516 /* Update the display of the text area. */
4517 if (update_text_area (w
, vpos
))
4520 if (current_row
->mouse_face_p
)
4521 *mouse_face_overwritten_p
= 1;
4524 /* Update display of the right margin area, if there is one. */
4525 if (!desired_row
->full_width_p
4526 && !NILP (w
->right_margin_cols
))
4529 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4532 /* Draw truncation marks etc. */
4533 if (!current_row
->enabled_p
4534 || desired_row
->y
!= current_row
->y
4535 || desired_row
->visible_height
!= current_row
->visible_height
4536 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4537 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4538 || current_row
->redraw_fringe_bitmaps_p
4539 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4540 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4541 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4542 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4543 rif
->after_update_window_line_hook (desired_row
);
4546 /* Update current_row from desired_row. */
4547 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4553 /* Set the cursor after an update of window W. This function may only
4554 be called from update_window. */
4557 set_window_cursor_after_update (w
)
4560 struct frame
*f
= XFRAME (w
->frame
);
4561 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4562 int cx
, cy
, vpos
, hpos
;
4564 /* Not intended for frame matrix updates. */
4565 xassert (FRAME_WINDOW_P (f
));
4567 if (cursor_in_echo_area
4568 && !NILP (echo_area_buffer
[0])
4569 /* If we are showing a message instead of the mini-buffer,
4570 show the cursor for the message instead. */
4571 && XWINDOW (minibuf_window
) == w
4572 && EQ (minibuf_window
, echo_area_window
)
4573 /* These cases apply only to the frame that contains
4574 the active mini-buffer window. */
4575 && FRAME_HAS_MINIBUF_P (f
)
4576 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4578 cx
= cy
= vpos
= hpos
= 0;
4580 if (cursor_in_echo_area
>= 0)
4582 /* If the mini-buffer is several lines high, find the last
4583 line that has any text on it. Note: either all lines
4584 are enabled or none. Otherwise we wouldn't be able to
4586 struct glyph_row
*row
, *last_row
;
4587 struct glyph
*glyph
;
4588 int yb
= window_text_bottom_y (w
);
4591 row
= w
->current_matrix
->rows
;
4592 while (row
->enabled_p
4593 && (last_row
== NULL
4594 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4596 if (row
->used
[TEXT_AREA
]
4597 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4604 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4605 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4607 while (last
> start
&& last
->charpos
< 0)
4610 for (glyph
= start
; glyph
< last
; ++glyph
)
4612 cx
+= glyph
->pixel_width
;
4617 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4625 hpos
= w
->cursor
.hpos
;
4626 vpos
= w
->cursor
.vpos
;
4629 /* Window cursor can be out of sync for horizontally split windows. */
4630 hpos
= max (0, hpos
);
4631 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4632 vpos
= max (0, vpos
);
4633 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4634 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4638 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4639 tree rooted at W. */
4642 set_window_update_flags (w
, on_p
)
4648 if (!NILP (w
->hchild
))
4649 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4650 else if (!NILP (w
->vchild
))
4651 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4653 w
->must_be_updated_p
= on_p
;
4655 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4661 /***********************************************************************
4662 Window-Based Scrolling
4663 ***********************************************************************/
4665 /* Structure describing rows in scrolling_window. */
4669 /* Number of occurrences of this row in desired and current matrix. */
4670 int old_uses
, new_uses
;
4672 /* Vpos of row in new matrix. */
4673 int new_line_number
;
4675 /* Bucket index of this row_entry in the hash table row_table. */
4678 /* The row described by this entry. */
4679 struct glyph_row
*row
;
4681 /* Hash collision chain. */
4682 struct row_entry
*next
;
4685 /* A pool to allocate row_entry structures from, and the size of the
4686 pool. The pool is reallocated in scrolling_window when we find
4687 that we need a larger one. */
4689 static struct row_entry
*row_entry_pool
;
4690 static int row_entry_pool_size
;
4692 /* Index of next free entry in row_entry_pool. */
4694 static int row_entry_idx
;
4696 /* The hash table used during scrolling, and the table's size. This
4697 table is used to quickly identify equal rows in the desired and
4700 static struct row_entry
**row_table
;
4701 static int row_table_size
;
4703 /* Vectors of pointers to row_entry structures belonging to the
4704 current and desired matrix, and the size of the vectors. */
4706 static struct row_entry
**old_lines
, **new_lines
;
4707 static int old_lines_size
, new_lines_size
;
4709 /* A pool to allocate run structures from, and its size. */
4711 static struct run
*run_pool
;
4712 static int runs_size
;
4714 /* A vector of runs of lines found during scrolling. */
4716 static struct run
**runs
;
4718 /* Add glyph row ROW to the scrolling hash table during the scrolling
4721 static INLINE
struct row_entry
*
4722 add_row_entry (w
, row
)
4724 struct glyph_row
*row
;
4726 struct row_entry
*entry
;
4727 int i
= row
->hash
% row_table_size
;
4729 entry
= row_table
[i
];
4730 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4731 entry
= entry
->next
;
4735 entry
= row_entry_pool
+ row_entry_idx
++;
4737 entry
->old_uses
= entry
->new_uses
= 0;
4738 entry
->new_line_number
= 0;
4740 entry
->next
= row_table
[i
];
4741 row_table
[i
] = entry
;
4748 /* Try to reuse part of the current display of W by scrolling lines.
4749 HEADER_LINE_P non-zero means W has a header line.
4751 The algorithm is taken from Communications of the ACM, Apr78 "A
4752 Technique for Isolating Differences Between Files." It should take
4755 A short outline of the steps of the algorithm
4757 1. Skip lines equal at the start and end of both matrices.
4759 2. Enter rows in the current and desired matrix into a symbol
4760 table, counting how often they appear in both matrices.
4762 3. Rows that appear exactly once in both matrices serve as anchors,
4763 i.e. we assume that such lines are likely to have been moved.
4765 4. Starting from anchor lines, extend regions to be scrolled both
4766 forward and backward.
4770 -1 if all rows were found to be equal.
4771 0 to indicate that we did not scroll the display, or
4772 1 if we did scroll. */
4775 scrolling_window (w
, header_line_p
)
4779 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4780 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4781 int yb
= window_text_bottom_y (w
);
4782 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4783 int nruns
, nbytes
, n
, run_idx
;
4784 struct row_entry
*entry
;
4785 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4787 /* Skip over rows equal at the start. */
4788 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4790 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4791 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4795 && !d
->redraw_fringe_bitmaps_p
4797 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4798 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4799 && row_equal_p (w
, c
, d
, 1))
4808 /* Give up if some rows in the desired matrix are not enabled. */
4809 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4812 first_old
= first_new
= i
;
4814 /* Set last_new to the index + 1 of the last enabled row in the
4817 while (i
< desired_matrix
->nrows
- 1
4818 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4819 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4822 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4827 /* Set last_old to the index + 1 of the last enabled row in the
4828 current matrix. We don't look at the enabled flag here because
4829 we plan to reuse part of the display even if other parts are
4832 while (i
< current_matrix
->nrows
- 1)
4834 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4843 /* Skip over rows equal at the bottom. */
4846 while (i
- 1 > first_new
4847 && j
- 1 > first_old
4848 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4849 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4850 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4851 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4853 MATRIX_ROW (desired_matrix
, i
- 1),
4854 MATRIX_ROW (current_matrix
, j
- 1), 1))
4859 /* Nothing to do if all rows are equal. */
4860 if (last_new
== first_new
)
4863 /* Reallocate vectors, tables etc. if necessary. */
4865 if (current_matrix
->nrows
> old_lines_size
)
4867 old_lines_size
= current_matrix
->nrows
;
4868 nbytes
= old_lines_size
* sizeof *old_lines
;
4869 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4872 if (desired_matrix
->nrows
> new_lines_size
)
4874 new_lines_size
= desired_matrix
->nrows
;
4875 nbytes
= new_lines_size
* sizeof *new_lines
;
4876 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4879 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4880 if (3 * n
> row_table_size
)
4882 row_table_size
= next_almost_prime (3 * n
);
4883 nbytes
= row_table_size
* sizeof *row_table
;
4884 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4885 bzero (row_table
, nbytes
);
4888 if (n
> row_entry_pool_size
)
4890 row_entry_pool_size
= n
;
4891 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4892 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4895 if (desired_matrix
->nrows
> runs_size
)
4897 runs_size
= desired_matrix
->nrows
;
4898 nbytes
= runs_size
* sizeof *runs
;
4899 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4900 nbytes
= runs_size
* sizeof *run_pool
;
4901 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4904 nruns
= run_idx
= 0;
4907 /* Add rows from the current and desired matrix to the hash table
4908 row_hash_table to be able to find equal ones quickly. */
4910 for (i
= first_old
; i
< last_old
; ++i
)
4912 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4914 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4915 old_lines
[i
] = entry
;
4919 old_lines
[i
] = NULL
;
4922 for (i
= first_new
; i
< last_new
; ++i
)
4924 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4925 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4927 entry
->new_line_number
= i
;
4928 new_lines
[i
] = entry
;
4931 /* Identify moves based on lines that are unique and equal
4932 in both matrices. */
4933 for (i
= first_old
; i
< last_old
;)
4935 && old_lines
[i
]->old_uses
== 1
4936 && old_lines
[i
]->new_uses
== 1)
4939 int new_line
= old_lines
[i
]->new_line_number
;
4940 struct run
*run
= run_pool
+ run_idx
++;
4943 run
->current_vpos
= i
;
4944 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4945 run
->desired_vpos
= new_line
;
4946 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4948 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4950 /* Extend backward. */
4953 while (j
> first_old
4955 && old_lines
[j
] == new_lines
[k
])
4957 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4958 --run
->current_vpos
;
4959 --run
->desired_vpos
;
4962 run
->desired_y
-= h
;
4963 run
->current_y
-= h
;
4967 /* Extend forward. */
4972 && old_lines
[j
] == new_lines
[k
])
4974 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4980 /* Insert run into list of all runs. Order runs by copied
4981 pixel lines. Note that we record runs that don't have to
4982 be copied because they are already in place. This is done
4983 because we can avoid calling update_window_line in this
4985 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4987 for (k
= nruns
; k
> j
; --k
)
4988 runs
[k
] = runs
[k
- 1];
4997 /* Do the moves. Do it in a way that we don't overwrite something
4998 we want to copy later on. This is not solvable in general
4999 because there is only one display and we don't have a way to
5000 exchange areas on this display. Example:
5002 +-----------+ +-----------+
5004 +-----------+ --> +-----------+
5006 +-----------+ +-----------+
5008 Instead, prefer bigger moves, and invalidate moves that would
5009 copy from where we copied to. */
5011 for (i
= 0; i
< nruns
; ++i
)
5012 if (runs
[i
]->nrows
> 0)
5014 struct run
*r
= runs
[i
];
5016 /* Copy on the display. */
5017 if (r
->current_y
!= r
->desired_y
)
5019 rif
->scroll_run_hook (w
, r
);
5021 /* Invalidate runs that copy from where we copied to. */
5022 for (j
= i
+ 1; j
< nruns
; ++j
)
5024 struct run
*p
= runs
[j
];
5026 if ((p
->current_y
>= r
->desired_y
5027 && p
->current_y
< r
->desired_y
+ r
->height
)
5028 || (p
->current_y
+ p
->height
>= r
->desired_y
5029 && (p
->current_y
+ p
->height
5030 < r
->desired_y
+ r
->height
)))
5035 /* Assign matrix rows. */
5036 for (j
= 0; j
< r
->nrows
; ++j
)
5038 struct glyph_row
*from
, *to
;
5039 int to_overlapped_p
;
5041 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5042 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5043 to_overlapped_p
= to
->overlapped_p
;
5044 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5045 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5046 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5047 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5048 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5049 || to
->overlay_arrow_p
!= from
->overlay_arrow_p
))
5050 from
->redraw_fringe_bitmaps_p
= 1;
5051 assign_row (to
, from
);
5052 to
->enabled_p
= 1, from
->enabled_p
= 0;
5053 to
->overlapped_p
= to_overlapped_p
;
5057 /* Clear the hash table, for the next time. */
5058 for (i
= 0; i
< row_entry_idx
; ++i
)
5059 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5061 /* Value is > 0 to indicate that we scrolled the display. */
5067 /************************************************************************
5069 ************************************************************************/
5071 /* Update the desired frame matrix of frame F.
5073 FORCE_P non-zero means that the update should not be stopped by
5074 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5075 should not be tried.
5077 Value is non-zero if update was stopped due to pending input. */
5080 update_frame_1 (f
, force_p
, inhibit_id_p
)
5085 /* Frame matrices to work on. */
5086 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5087 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5090 int preempt_count
= baud_rate
/ 2400 + 1;
5091 extern int input_pending
;
5093 xassert (current_matrix
&& desired_matrix
);
5095 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5096 calculate_costs (f
);
5098 if (preempt_count
<= 0)
5101 if (redisplay_dont_pause
)
5103 else if (!force_p
&& detect_input_pending ())
5109 /* If we cannot insert/delete lines, it's no use trying it. */
5110 if (!FRAME_LINE_INS_DEL_OK (f
))
5113 /* See if any of the desired lines are enabled; don't compute for
5114 i/d line if just want cursor motion. */
5115 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5116 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5119 /* Try doing i/d line, if not yet inhibited. */
5120 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5121 force_p
|= scrolling (f
);
5123 /* Update the individual lines as needed. Do bottom line first. */
5124 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5125 update_frame_line (f
, desired_matrix
->nrows
- 1);
5127 /* Now update the rest of the lines. */
5128 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5130 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5132 if (FRAME_TERMCAP_P (f
))
5134 /* Flush out every so many lines.
5135 Also flush out if likely to have more than 1k buffered
5136 otherwise. I'm told that some telnet connections get
5137 really screwed by more than 1k output at once. */
5138 int outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
)->output
);
5140 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5142 fflush (FRAME_TTY (f
)->output
);
5143 if (preempt_count
== 1)
5145 #ifdef EMACS_OUTQSIZE
5146 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5147 /* Probably not a tty. Ignore the error and reset
5149 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5152 if (baud_rate
<= outq
&& baud_rate
> 0)
5153 sleep (outq
/ baud_rate
);
5158 if ((i
- 1) % preempt_count
== 0)
5159 detect_input_pending ();
5161 update_frame_line (f
, i
);
5165 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5167 /* Now just clean up termcap drivers and set cursor, etc. */
5170 if ((cursor_in_echo_area
5171 /* If we are showing a message instead of the mini-buffer,
5172 show the cursor for the message instead of for the
5173 (now hidden) mini-buffer contents. */
5174 || (EQ (minibuf_window
, selected_window
)
5175 && EQ (minibuf_window
, echo_area_window
)
5176 && !NILP (echo_area_buffer
[0])))
5177 /* These cases apply only to the frame that contains
5178 the active mini-buffer window. */
5179 && FRAME_HAS_MINIBUF_P (f
)
5180 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5182 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5185 if (cursor_in_echo_area
< 0)
5187 /* Negative value of cursor_in_echo_area means put
5188 cursor at beginning of line. */
5194 /* Positive value of cursor_in_echo_area means put
5195 cursor at the end of the prompt. If the mini-buffer
5196 is several lines high, find the last line that has
5198 row
= FRAME_LINES (f
);
5204 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5206 /* Frame rows are filled up with spaces that
5207 must be ignored here. */
5208 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5210 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5211 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5214 && (last
- 1)->charpos
< 0)
5220 while (row
> top
&& col
== 0);
5222 /* Make sure COL is not out of range. */
5223 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5225 /* If we have another row, advance cursor into it. */
5226 if (row
< FRAME_LINES (f
) - 1)
5228 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5231 /* Otherwise move it back in range. */
5233 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5237 cursor_to (row
, col
);
5241 /* We have only one cursor on terminal frames. Use it to
5242 display the cursor of the selected window. */
5243 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5244 if (w
->cursor
.vpos
>= 0
5245 /* The cursor vpos may be temporarily out of bounds
5246 in the following situation: There is one window,
5247 with the cursor in the lower half of it. The window
5248 is split, and a message causes a redisplay before
5249 a new cursor position has been computed. */
5250 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5252 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5253 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5255 if (INTEGERP (w
->left_margin_cols
))
5256 x
+= XFASTINT (w
->left_margin_cols
);
5258 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5266 clear_desired_matrices (f
);
5271 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5275 struct frame
*frame
;
5277 int unchanged_at_top
, unchanged_at_bottom
;
5280 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5281 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5282 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5283 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5285 int free_at_end_vpos
= FRAME_LINES (frame
);
5286 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5287 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5289 if (!current_matrix
)
5292 /* Compute hash codes of all the lines. Also calculate number of
5293 changed lines, number of unchanged lines at the beginning, and
5294 number of unchanged lines at the end. */
5296 unchanged_at_top
= 0;
5297 unchanged_at_bottom
= FRAME_LINES (frame
);
5298 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5300 /* Give up on this scrolling if some old lines are not enabled. */
5301 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5303 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5304 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5306 /* This line cannot be redrawn, so don't let scrolling mess it. */
5307 new_hash
[i
] = old_hash
[i
];
5308 #define INFINITY 1000000 /* Taken from scroll.c */
5309 draw_cost
[i
] = INFINITY
;
5313 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5314 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5317 if (old_hash
[i
] != new_hash
[i
])
5320 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5322 else if (i
== unchanged_at_top
)
5324 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5327 /* If changed lines are few, don't allow preemption, don't scroll. */
5328 if ((!FRAME_SCROLL_REGION_OK (frame
)
5329 && changed_lines
< baud_rate
/ 2400)
5330 || unchanged_at_bottom
== FRAME_LINES (frame
))
5333 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5334 - unchanged_at_bottom
);
5336 if (FRAME_SCROLL_REGION_OK (frame
))
5337 free_at_end_vpos
-= unchanged_at_bottom
;
5338 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5339 free_at_end_vpos
= -1;
5341 /* If large window, fast terminal and few lines in common between
5342 current frame and desired frame, don't bother with i/d calc. */
5343 if (!FRAME_SCROLL_REGION_OK (frame
)
5344 && window_size
>= 18 && baud_rate
> 2400
5346 10 * scrolling_max_lines_saved (unchanged_at_top
,
5347 FRAME_LINES (frame
) - unchanged_at_bottom
,
5348 old_hash
, new_hash
, draw_cost
)))
5351 if (window_size
< 2)
5354 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5355 draw_cost
+ unchanged_at_top
- 1,
5356 old_draw_cost
+ unchanged_at_top
- 1,
5357 old_hash
+ unchanged_at_top
- 1,
5358 new_hash
+ unchanged_at_top
- 1,
5359 free_at_end_vpos
- unchanged_at_top
);
5365 /* Count the number of blanks at the start of the vector of glyphs R
5366 which is LEN glyphs long. */
5369 count_blanks (r
, len
)
5375 for (i
= 0; i
< len
; ++i
)
5376 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5383 /* Count the number of glyphs in common at the start of the glyph
5384 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5385 of STR2. Value is the number of equal glyphs equal at the start. */
5388 count_match (str1
, end1
, str2
, end2
)
5389 struct glyph
*str1
, *end1
, *str2
, *end2
;
5391 struct glyph
*p1
= str1
;
5392 struct glyph
*p2
= str2
;
5396 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5403 /* Char insertion/deletion cost vector, from term.c */
5405 extern int *char_ins_del_vector
;
5406 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5409 /* Perform a frame-based update on line VPOS in frame FRAME. */
5412 update_frame_line (f
, vpos
)
5416 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5418 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5419 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5420 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5421 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5422 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5423 int must_write_whole_line_p
;
5424 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5425 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5426 != FACE_TTY_DEFAULT_BG_COLOR
);
5428 if (colored_spaces_p
)
5431 /* Current row not enabled means it has unknown contents. We must
5432 write the whole desired line in that case. */
5433 must_write_whole_line_p
= !current_row
->enabled_p
;
5434 if (must_write_whole_line_p
)
5441 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5442 olen
= current_row
->used
[TEXT_AREA
];
5444 /* Ignore trailing spaces, if we can. */
5445 if (!write_spaces_p
)
5446 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5450 current_row
->enabled_p
= 1;
5451 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5453 /* If desired line is empty, just clear the line. */
5454 if (!desired_row
->enabled_p
)
5460 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5461 nlen
= desired_row
->used
[TEXT_AREA
];
5462 nend
= nbody
+ nlen
;
5464 /* If display line has unknown contents, write the whole line. */
5465 if (must_write_whole_line_p
)
5467 /* Ignore spaces at the end, if we can. */
5468 if (!write_spaces_p
)
5469 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5472 /* Write the contents of the desired line. */
5475 cursor_to (vpos
, 0);
5476 write_glyphs (nbody
, nlen
);
5479 /* Don't call clear_end_of_line if we already wrote the whole
5480 line. The cursor will not be at the right margin in that
5481 case but in the line below. */
5482 if (nlen
< FRAME_TOTAL_COLS (f
))
5484 cursor_to (vpos
, nlen
);
5485 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5488 /* Make sure we are in the right row, otherwise cursor movement
5489 with cmgoto might use `ch' in the wrong row. */
5490 cursor_to (vpos
, 0);
5492 make_current (desired_matrix
, current_matrix
, vpos
);
5496 /* Pretend trailing spaces are not there at all,
5497 unless for one reason or another we must write all spaces. */
5498 if (!write_spaces_p
)
5499 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5502 /* If there's no i/d char, quickly do the best we can without it. */
5503 if (!FRAME_CHAR_INS_DEL_OK (f
))
5507 /* Find the first glyph in desired row that doesn't agree with
5508 a glyph in the current row, and write the rest from there on. */
5509 for (i
= 0; i
< nlen
; i
++)
5511 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5513 /* Find the end of the run of different glyphs. */
5517 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5518 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5521 /* Output this run of non-matching chars. */
5522 cursor_to (vpos
, i
);
5523 write_glyphs (nbody
+ i
, j
- i
);
5526 /* Now find the next non-match. */
5530 /* Clear the rest of the line, or the non-clear part of it. */
5533 cursor_to (vpos
, nlen
);
5534 clear_end_of_line (olen
);
5537 /* Make current row = desired row. */
5538 make_current (desired_matrix
, current_matrix
, vpos
);
5542 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5543 characters in a row. */
5547 /* If current line is blank, skip over initial spaces, if
5548 possible, and write the rest. */
5552 nsp
= count_blanks (nbody
, nlen
);
5556 cursor_to (vpos
, nsp
);
5557 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5560 /* Exchange contents between current_frame and new_frame. */
5561 make_current (desired_matrix
, current_matrix
, vpos
);
5565 /* Compute number of leading blanks in old and new contents. */
5566 osp
= count_blanks (obody
, olen
);
5567 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5569 /* Compute number of matching chars starting with first non-blank. */
5570 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5571 nbody
+ nsp
, nbody
+ nlen
);
5573 /* Spaces in new match implicit space past the end of old. */
5574 /* A bug causing this to be a no-op was fixed in 18.29. */
5575 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5578 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5582 /* Avoid doing insert/delete char
5583 just cause number of leading spaces differs
5584 when the following text does not match. */
5585 if (begmatch
== 0 && osp
!= nsp
)
5586 osp
= nsp
= min (osp
, nsp
);
5588 /* Find matching characters at end of line */
5591 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5593 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5598 endmatch
= obody
+ olen
- op1
;
5600 /* tem gets the distance to insert or delete.
5601 endmatch is how many characters we save by doing so.
5604 tem
= (nlen
- nsp
) - (olen
- osp
);
5606 && (!FRAME_CHAR_INS_DEL_OK (f
)
5607 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5610 /* nsp - osp is the distance to insert or delete.
5611 If that is nonzero, begmatch is known to be nonzero also.
5612 begmatch + endmatch is how much we save by doing the ins/del.
5616 && (!FRAME_CHAR_INS_DEL_OK (f
)
5617 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5621 osp
= nsp
= min (osp
, nsp
);
5624 /* Now go through the line, inserting, writing and
5625 deleting as appropriate. */
5629 cursor_to (vpos
, nsp
);
5630 delete_glyphs (osp
- nsp
);
5634 /* If going to delete chars later in line
5635 and insert earlier in the line,
5636 must delete first to avoid losing data in the insert */
5637 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5639 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5640 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5641 olen
= nlen
- (nsp
- osp
);
5643 cursor_to (vpos
, osp
);
5644 insert_glyphs (0, nsp
- osp
);
5648 tem
= nsp
+ begmatch
+ endmatch
;
5649 if (nlen
!= tem
|| olen
!= tem
)
5651 if (!endmatch
|| nlen
== olen
)
5653 /* If new text being written reaches right margin, there is
5654 no need to do clear-to-eol at the end of this function
5655 (and it would not be safe, since cursor is not going to
5656 be "at the margin" after the text is done). */
5657 if (nlen
== FRAME_TOTAL_COLS (f
))
5660 /* Function write_glyphs is prepared to do nothing
5661 if passed a length <= 0. Check it here to avoid
5662 unnecessary cursor movement. */
5665 cursor_to (vpos
, nsp
+ begmatch
);
5666 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5669 else if (nlen
> olen
)
5671 /* Here, we used to have the following simple code:
5672 ----------------------------------------
5673 write_glyphs (nbody + nsp + begmatch, olen - tem);
5674 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5675 ----------------------------------------
5676 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5677 is a padding glyph. */
5678 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5681 cursor_to (vpos
, nsp
+ begmatch
);
5683 /* Calculate columns we can actually overwrite. */
5684 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5686 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5688 /* If we left columns to be overwritten, we must delete them. */
5689 del
= olen
- tem
- out
;
5691 delete_glyphs (del
);
5693 /* At last, we insert columns not yet written out. */
5694 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5697 else if (olen
> nlen
)
5699 cursor_to (vpos
, nsp
+ begmatch
);
5700 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5701 delete_glyphs (olen
- nlen
);
5707 /* If any unerased characters remain after the new line, erase them. */
5710 cursor_to (vpos
, nlen
);
5711 clear_end_of_line (olen
);
5714 /* Exchange contents between current_frame and new_frame. */
5715 make_current (desired_matrix
, current_matrix
, vpos
);
5720 /***********************************************************************
5721 X/Y Position -> Buffer Position
5722 ***********************************************************************/
5724 /* Determine what's under window-relative pixel position (*X, *Y).
5725 Return the object (string or buffer) that's there.
5726 Return in *POS the position in that object.
5727 Adjust *X and *Y to character positions. */
5730 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5733 struct display_pos
*pos
;
5734 Lisp_Object
*object
;
5736 int *width
, *height
;
5739 struct buffer
*old_current_buffer
= current_buffer
;
5740 struct text_pos startp
;
5742 struct glyph_row
*row
;
5745 current_buffer
= XBUFFER (w
->buffer
);
5746 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5747 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5748 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5749 start_display (&it
, w
, startp
);
5751 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5752 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5753 MOVE_TO_X
| MOVE_TO_Y
);
5755 current_buffer
= old_current_buffer
;
5757 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5758 *dy
= *y
- it
.current_y
;
5761 if (STRINGP (it
.string
))
5765 #ifdef HAVE_WINDOW_SYSTEM
5766 if (it
.what
== IT_IMAGE
)
5769 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5770 && !NILP (img
->spec
))
5771 *object
= img
->spec
;
5775 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5778 if (it
.hpos
< row
->used
[TEXT_AREA
])
5780 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5781 *width
= glyph
->pixel_width
;
5782 *height
= glyph
->ascent
+ glyph
->descent
;
5783 #ifdef HAVE_WINDOW_SYSTEM
5784 if (glyph
->type
== IMAGE_GLYPH
)
5785 *dy
-= row
->ascent
- glyph
->ascent
;
5791 *height
= row
->height
;
5796 *width
= *height
= 0;
5799 /* Add extra (default width) columns if clicked after EOL. */
5800 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5802 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5811 /* Value is the string under window-relative coordinates X/Y in the
5812 mode line or header line (PART says which) of window W, or nil if none.
5813 *CHARPOS is set to the position in the string returned. */
5816 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5818 enum window_part part
;
5821 Lisp_Object
*object
;
5823 int *width
, *height
;
5825 struct glyph_row
*row
;
5826 struct glyph
*glyph
, *end
;
5828 Lisp_Object string
= Qnil
;
5830 if (part
== ON_MODE_LINE
)
5831 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5833 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5835 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5837 if (row
->mode_line_p
&& row
->enabled_p
)
5839 /* Find the glyph under X. If we find one with a string object,
5840 it's the one we were looking for. */
5841 glyph
= row
->glyphs
[TEXT_AREA
];
5842 end
= glyph
+ row
->used
[TEXT_AREA
];
5843 for (x0
= *x
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5844 x0
-= glyph
->pixel_width
;
5845 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5848 string
= glyph
->object
;
5849 *charpos
= glyph
->charpos
;
5850 *width
= glyph
->pixel_width
;
5851 *height
= glyph
->ascent
+ glyph
->descent
;
5852 #ifdef HAVE_WINDOW_SYSTEM
5853 if (glyph
->type
== IMAGE_GLYPH
)
5856 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5858 *object
= img
->spec
;
5859 y0
-= row
->ascent
- glyph
->ascent
;
5865 /* Add extra (default width) columns if clicked after EOL. */
5866 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5868 *height
= row
->height
;
5875 *width
= *height
= 0;
5885 /* Value is the string under window-relative coordinates X/Y in either
5886 marginal area, or nil if none. *CHARPOS is set to the position in
5887 the string returned. */
5890 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5892 enum window_part part
;
5895 Lisp_Object
*object
;
5897 int *width
, *height
;
5899 struct glyph_row
*row
= w
->current_matrix
->rows
;
5900 struct glyph
*glyph
, *end
;
5901 int x0
, y0
, i
, wy
= *y
;
5903 Lisp_Object string
= Qnil
;
5905 if (part
== ON_LEFT_MARGIN
)
5906 area
= LEFT_MARGIN_AREA
;
5907 else if (part
== ON_RIGHT_MARGIN
)
5908 area
= RIGHT_MARGIN_AREA
;
5912 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5913 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5916 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5920 /* Find the glyph under X. If we find one with a string object,
5921 it's the one we were looking for. */
5922 if (area
== RIGHT_MARGIN_AREA
)
5923 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5924 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5925 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5926 + window_box_width (w
, LEFT_MARGIN_AREA
)
5927 + window_box_width (w
, TEXT_AREA
));
5929 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5930 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5933 glyph
= row
->glyphs
[area
];
5934 end
= glyph
+ row
->used
[area
];
5935 for (x0
= *x
- x0
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5936 x0
-= glyph
->pixel_width
;
5937 *x
= glyph
- row
->glyphs
[area
];
5940 string
= glyph
->object
;
5941 *charpos
= glyph
->charpos
;
5942 *width
= glyph
->pixel_width
;
5943 *height
= glyph
->ascent
+ glyph
->descent
;
5944 #ifdef HAVE_WINDOW_SYSTEM
5945 if (glyph
->type
== IMAGE_GLYPH
)
5948 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5950 *object
= img
->spec
;
5951 y0
-= row
->ascent
- glyph
->ascent
;
5957 /* Add extra (default width) columns if clicked after EOL. */
5958 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5960 *height
= row
->height
;
5967 *width
= *height
= 0;
5977 /***********************************************************************
5978 Changing Frame Sizes
5979 ***********************************************************************/
5984 window_change_signal (signalnum
) /* If we don't have an argument, */
5985 int signalnum
; /* some compilers complain in signal calls. */
5991 int old_errno
= errno
;
5993 struct tty_display_info
*tty
;
5995 /* The frame size change obviously applies to a single
5996 termcap-controlled terminal, but we can't decide which.
5997 Therefore, we resize the frames corresponding to each tty.
5999 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6001 if (! tty
->term_initted
)
6004 get_tty_size (fileno (tty
->input
), &width
, &height
);
6007 Lisp_Object tail
, frame
;
6009 FOR_EACH_FRAME (tail
, frame
)
6010 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6011 /* Record the new sizes, but don't reallocate the data
6012 structures now. Let that be done later outside of the
6014 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6018 signal (SIGWINCH
, window_change_signal
);
6021 #endif /* SIGWINCH */
6024 /* Do any change in frame size that was requested by a signal. SAFE
6025 non-zero means this function is called from a place where it is
6026 safe to change frame sizes while a redisplay is in progress. */
6029 do_pending_window_change (safe
)
6032 /* If window_change_signal should have run before, run it now. */
6033 if (redisplaying_p
&& !safe
)
6036 while (delayed_size_change
)
6038 Lisp_Object tail
, frame
;
6040 delayed_size_change
= 0;
6042 FOR_EACH_FRAME (tail
, frame
)
6044 struct frame
*f
= XFRAME (frame
);
6046 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6047 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6054 /* Change the frame height and/or width. Values may be given as zero to
6055 indicate no change is to take place.
6057 If DELAY is non-zero, then assume we're being called from a signal
6058 handler, and queue the change for later - perhaps the next
6059 redisplay. Since this tries to resize windows, we can't call it
6060 from a signal handler.
6062 SAFE non-zero means this function is called from a place where it's
6063 safe to change frame sizes while a redisplay is in progress. */
6066 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6067 register struct frame
*f
;
6068 int newheight
, newwidth
, pretend
, delay
, safe
;
6070 Lisp_Object tail
, frame
;
6072 if (FRAME_MSDOS_P (f
))
6074 /* On MS-DOS, all frames use the same screen, so a change in
6075 size affects all frames. Termcap now supports multiple
6077 FOR_EACH_FRAME (tail
, frame
)
6078 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6079 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6080 pretend
, delay
, safe
);
6083 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6087 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6088 register struct frame
*f
;
6089 int newheight
, newwidth
, pretend
, delay
, safe
;
6091 int new_frame_total_cols
;
6092 int count
= SPECPDL_INDEX ();
6094 /* If we can't deal with the change now, queue it for later. */
6095 if (delay
|| (redisplaying_p
&& !safe
))
6097 f
->new_text_lines
= newheight
;
6098 f
->new_text_cols
= newwidth
;
6099 delayed_size_change
= 1;
6103 /* This size-change overrides any pending one for this frame. */
6104 f
->new_text_lines
= 0;
6105 f
->new_text_cols
= 0;
6107 /* If an argument is zero, set it to the current value. */
6109 newheight
= FRAME_LINES (f
);
6111 newwidth
= FRAME_COLS (f
);
6113 /* Compute width of windows in F.
6114 This is the width of the frame without vertical scroll bars. */
6115 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6117 /* Round up to the smallest acceptable size. */
6118 check_frame_size (f
, &newheight
, &newwidth
);
6120 /* If we're not changing the frame size, quit now. */
6121 if (newheight
== FRAME_LINES (f
)
6122 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6128 /* We only can set screen dimensions to certain values supported
6129 by our video hardware. Try to find the smallest size greater
6130 or equal to the requested dimensions. */
6131 dos_set_window_size (&newheight
, &newwidth
);
6134 if (newheight
!= FRAME_LINES (f
))
6136 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6138 /* Frame has both root and mini-buffer. */
6139 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6140 FRAME_TOP_MARGIN (f
));
6141 set_window_height (FRAME_ROOT_WINDOW (f
),
6144 - FRAME_TOP_MARGIN (f
)),
6146 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6148 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6151 /* Frame has just one top-level window. */
6152 set_window_height (FRAME_ROOT_WINDOW (f
),
6153 newheight
- FRAME_TOP_MARGIN (f
), 0);
6155 if (FRAME_TERMCAP_P (f
) && !pretend
)
6156 FrameRows (FRAME_TTY (f
)) = newheight
;
6159 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6161 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6162 if (FRAME_HAS_MINIBUF_P (f
))
6163 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6165 if (FRAME_TERMCAP_P (f
) && !pretend
)
6166 FrameCols (FRAME_TTY (f
)) = newwidth
;
6168 if (WINDOWP (f
->tool_bar_window
))
6169 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6172 FRAME_LINES (f
) = newheight
;
6173 SET_FRAME_COLS (f
, newwidth
);
6176 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6177 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6179 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6181 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6182 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6183 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6184 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6188 calculate_costs (f
);
6189 SET_FRAME_GARBAGED (f
);
6194 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6196 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6197 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6198 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6200 unbind_to (count
, Qnil
);
6205 /***********************************************************************
6206 Terminal Related Lisp Functions
6207 ***********************************************************************/
6209 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6210 1, 1, "FOpen termscript file: ",
6211 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6212 FILE = nil means just close any termscript file currently open. */)
6216 struct tty_display_info
*tty
;
6218 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6219 error ("Current frame is not on a tty device");
6223 if (tty
->termscript
!= 0)
6224 fclose (tty
->termscript
);
6225 tty
->termscript
= 0;
6229 file
= Fexpand_file_name (file
, Qnil
);
6230 tty
->termscript
= fopen (SDATA (file
), "w");
6231 if (tty
->termscript
== 0)
6232 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6238 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6239 Ssend_string_to_terminal
, 1, 1, 0,
6240 doc
: /* Send STRING to the terminal without alteration.
6241 Control characters in STRING will have terminal-dependent effects. */)
6245 struct tty_display_info
*tty
;
6247 /* ??? Perhaps we should do something special for multibyte strings here. */
6248 CHECK_STRING (string
);
6250 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6251 error ("Current frame is not on a tty device");
6255 if (tty
->termscript
)
6257 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6258 fflush (tty
->termscript
);
6260 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->output
);
6261 fflush (tty
->output
);
6266 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6267 doc
: /* Beep, or flash the screen.
6268 Also, unless an argument is given,
6269 terminate any keyboard macro currently executing. */)
6279 if (FRAME_TERMCAP_P (XFRAME (selected_frame
)))
6280 fflush (CURTTY ()->output
);
6293 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6294 error ("Keyboard macro terminated by a command ringing the bell");
6297 if (FRAME_TERMCAP_P (XFRAME (selected_frame
)))
6298 fflush (CURTTY ()->output
);
6303 /***********************************************************************
6305 ***********************************************************************/
6307 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6308 doc
: /* Pause, without updating display, for SECONDS seconds.
6309 SECONDS may be a floating-point value, meaning that you can wait for a
6310 fraction of a second. Optional second arg MILLISECONDS specifies an
6311 additional wait period, in milliseconds; this may be useful if your
6312 Emacs was built without floating point support.
6313 \(Not all operating systems support waiting for a fraction of a second.) */)
6314 (seconds
, milliseconds
)
6315 Lisp_Object seconds
, milliseconds
;
6319 if (NILP (milliseconds
))
6320 XSETINT (milliseconds
, 0);
6322 CHECK_NUMBER (milliseconds
);
6323 usec
= XINT (milliseconds
) * 1000;
6326 double duration
= extract_float (seconds
);
6327 sec
= (int) duration
;
6328 usec
+= (duration
- sec
) * 1000000;
6331 #ifndef EMACS_HAS_USECS
6332 if (sec
== 0 && usec
!= 0)
6333 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6336 /* Assure that 0 <= usec < 1000000. */
6339 /* We can't rely on the rounding being correct if usec is negative. */
6340 if (-1000000 < usec
)
6341 sec
--, usec
+= 1000000;
6343 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6346 sec
+= usec
/ 1000000, usec
%= 1000000;
6348 if (sec
< 0 || (sec
== 0 && usec
== 0))
6354 XSETFASTINT (zero
, 0);
6355 wait_reading_process_input (sec
, usec
, zero
, 0);
6358 /* We should always have wait_reading_process_input; we have a dummy
6359 implementation for systems which don't support subprocesses. */
6361 /* No wait_reading_process_input */
6368 /* The reason this is done this way
6369 (rather than defined (H_S) && defined (H_T))
6370 is because the VMS preprocessor doesn't grok `defined'. */
6372 EMACS_GET_TIME (end_time
);
6373 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6374 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6378 EMACS_GET_TIME (timeout
);
6379 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6380 if (EMACS_TIME_NEG_P (timeout
)
6381 || !select (1, 0, 0, 0, &timeout
))
6384 #else /* not HAVE_SELECT */
6386 #endif /* HAVE_SELECT */
6387 #endif /* not VMS */
6390 #endif /* no subprocesses */
6396 /* This is just like wait_reading_process_input, except that
6397 it does the redisplay.
6399 It's also much like Fsit_for, except that it can be used for
6400 waiting for input as well. */
6403 sit_for (sec
, usec
, reading
, display
, initial_display
)
6404 int sec
, usec
, reading
, display
, initial_display
;
6406 Lisp_Object read_kbd
;
6408 swallow_events (display
);
6410 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6413 if (initial_display
)
6414 redisplay_preserve_echo_area (2);
6416 if (sec
== 0 && usec
== 0)
6423 XSETINT (read_kbd
, reading
? -1 : 1);
6424 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6426 return detect_input_pending () ? Qnil
: Qt
;
6430 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6431 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6432 SECONDS may be a floating-point value, meaning that you can wait for a
6433 fraction of a second.
6434 \(Not all operating systems support waiting for a fraction of a second.)
6435 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6436 Redisplay is preempted as always if input arrives, and does not happen
6437 if input is available before it starts.
6438 Value is t if waited the full time with no input arriving.
6440 An obsolete but still supported form is
6441 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6442 Where the optional arg MILLISECONDS specifies an additional wait period,
6443 in milliseconds; this was useful when Emacs was built without
6444 floating point support.
6445 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6447 /* The `old-nodisp' stuff is there so that the arglist has the correct
6448 length. Otherwise, `defdvice' will redefine it with fewer args. */
6449 (seconds
, milliseconds
, nodisp
)
6450 Lisp_Object seconds
, milliseconds
, nodisp
;
6454 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6456 nodisp
= milliseconds
;
6457 milliseconds
= Qnil
;
6460 if (NILP (milliseconds
))
6461 XSETINT (milliseconds
, 0);
6463 CHECK_NUMBER (milliseconds
);
6464 usec
= XINT (milliseconds
) * 1000;
6467 double duration
= extract_float (seconds
);
6468 sec
= (int) duration
;
6469 usec
+= (duration
- sec
) * 1000000;
6472 #ifndef EMACS_HAS_USECS
6473 if (usec
!= 0 && sec
== 0)
6474 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6477 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6482 /***********************************************************************
6483 Other Lisp Functions
6484 ***********************************************************************/
6486 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6487 session's frames, frame names, buffers, buffer-read-only flags, and
6488 buffer-modified-flags, and a trailing sentinel (so we don't need to
6489 add length checks). */
6491 static Lisp_Object frame_and_buffer_state
;
6494 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6495 Sframe_or_buffer_changed_p
, 0, 0, 0,
6496 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6497 The state variable is an internal vector containing all frames and buffers,
6498 aside from buffers whose names start with space,
6499 along with the buffers' read-only and modified flags, which allows a fast
6500 check to see whether the menu bars might need to be recomputed.
6501 If this function returns non-nil, it updates the internal vector to reflect
6502 the current state. */)
6505 Lisp_Object tail
, frame
, buf
;
6509 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6510 FOR_EACH_FRAME (tail
, frame
)
6512 if (!EQ (*vecp
++, frame
))
6514 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6517 /* Check that the buffer info matches.
6518 No need to test for the end of the vector
6519 because the last element of the vector is lambda
6520 and that will always cause a mismatch. */
6521 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6523 buf
= XCDR (XCAR (tail
));
6524 /* Ignore buffers that aren't included in buffer lists. */
6525 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6527 if (!EQ (*vecp
++, buf
))
6529 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6531 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6534 /* Detect deletion of a buffer at the end of the list. */
6535 if (EQ (*vecp
, Qlambda
))
6538 /* Start with 1 so there is room for at least one lambda at the end. */
6540 FOR_EACH_FRAME (tail
, frame
)
6542 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6544 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6545 if (n
> XVECTOR (frame_and_buffer_state
)->size
6546 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6547 /* Add 20 extra so we grow it less often. */
6548 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6549 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6550 FOR_EACH_FRAME (tail
, frame
)
6553 *vecp
++ = XFRAME (frame
)->name
;
6555 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6557 buf
= XCDR (XCAR (tail
));
6558 /* Ignore buffers that aren't included in buffer lists. */
6559 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6562 *vecp
++ = XBUFFER (buf
)->read_only
;
6563 *vecp
++ = Fbuffer_modified_p (buf
);
6565 /* Fill up the vector with lambdas (always at least one). */
6567 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6568 < XVECTOR (frame_and_buffer_state
)->size
)
6570 /* Make sure we didn't overflow the vector. */
6571 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6572 > XVECTOR (frame_and_buffer_state
)->size
)
6579 /***********************************************************************
6581 ***********************************************************************/
6583 /* Initialization done when Emacs fork is started, before doing stty.
6584 Determine terminal type and set terminal_driver. Then invoke its
6585 decoding routine to set up variables in the terminal package. */
6590 char *terminal_type
;
6592 #ifdef HAVE_X_WINDOWS
6593 extern int display_arg
;
6596 /* Construct the space glyph. */
6597 space_glyph
.type
= CHAR_GLYPH
;
6598 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6599 space_glyph
.charpos
= -1;
6602 cursor_in_echo_area
= 0;
6603 terminal_type
= (char *) 0;
6605 /* Now is the time to initialize this; it's used by init_sys_modes
6607 Vinitial_window_system
= Qnil
;
6609 /* If the user wants to use a window system, we shouldn't bother
6610 initializing the terminal. This is especially important when the
6611 terminal is so dumb that emacs gives up before and doesn't bother
6612 using the window system.
6614 If the DISPLAY environment variable is set and nonempty,
6615 try to use X, and die with an error message if that doesn't work. */
6617 #ifdef HAVE_X_WINDOWS
6622 display
= getenv ("DECW$DISPLAY");
6624 display
= getenv ("DISPLAY");
6627 display_arg
= (display
!= 0 && *display
!= 0);
6630 if (!inhibit_window_system
&& display_arg
6636 Vinitial_window_system
= intern ("x");
6638 Vwindow_system_version
= make_number (11);
6640 Vwindow_system_version
= make_number (10);
6642 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6643 /* In some versions of ncurses,
6644 tputs crashes if we have not called tgetent.
6646 { char b
[2044]; tgetent (b
, "xterm");}
6648 adjust_frame_glyphs_initially ();
6651 #endif /* HAVE_X_WINDOWS */
6654 if (!inhibit_window_system
)
6656 Vinitial_window_system
= intern ("w32");
6657 Vwindow_system_version
= make_number (1);
6658 adjust_frame_glyphs_initially ();
6661 #endif /* HAVE_NTGUI */
6664 if (!inhibit_window_system
)
6666 Vinitial_window_system
= intern ("mac");
6667 Vwindow_system_version
= make_number (1);
6668 adjust_frame_glyphs_initially ();
6673 /* If no window system has been specified, try to use the terminal. */
6676 fatal ("standard input is not a tty");
6680 /* Look at the TERM variable. */
6681 terminal_type
= (char *) getenv ("TERM");
6685 fprintf (stderr
, "Please specify your terminal type.\n\
6686 For types defined in VMS, use set term /device=TYPE.\n\
6687 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6688 \(The quotation marks are necessary since terminal types are lower case.)\n");
6690 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6696 /* VMS DCL tends to up-case things, so down-case term type.
6697 Hardly any uppercase letters in terminal types; should be none. */
6699 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6702 strcpy (new, terminal_type
);
6704 for (p
= new; *p
; p
++)
6708 terminal_type
= new;
6714 struct frame
*f
= XFRAME (selected_frame
);
6716 /* Open a display on the controlling tty. */
6717 d
= term_init (0, terminal_type
, 1); /* Errors are fatal. */
6719 /* Convert the initial frame to use the new display. */
6720 if (f
->output_method
!= output_initial
)
6722 f
->output_method
= d
->type
;
6725 f
->kboard
= d
->display_info
.tty
->kboard
;
6728 d
->reference_count
++;
6729 d
->display_info
.tty
->top_frame
= selected_frame
;
6730 change_frame_size (XFRAME (selected_frame
), FrameRows (d
->display_info
.tty
), FrameCols (d
->display_info
.tty
), 0, 0, 1);
6732 /* Delete the initial display. */
6733 if (--initial_display
->reference_count
== 0
6734 && initial_display
->delete_display_hook
)
6735 (*initial_display
->delete_display_hook
) (initial_display
);
6737 /* Update frame parameters to reflect the new type. */
6738 Fmodify_frame_parameters
6739 (selected_frame
, Fcons (Fcons (Qtty_type
,
6740 Fframe_tty_type (selected_frame
)), Qnil
));
6744 struct frame
*sf
= SELECTED_FRAME ();
6745 int width
= FRAME_TOTAL_COLS (sf
);
6746 int height
= FRAME_LINES (sf
);
6748 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6750 /* If these sizes are so big they cause overflow, just ignore the
6751 change. It's not clear what better we could do. */
6752 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6753 fatal ("screen size %dx%d too big", width
, height
);
6756 adjust_frame_glyphs_initially ();
6757 calculate_costs (XFRAME (selected_frame
));
6762 #endif /* CANNOT_DUMP */
6763 signal (SIGWINCH
, window_change_signal
);
6764 #endif /* SIGWINCH */
6766 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6770 /* The MSDOS terminal turns on its ``window system'' relatively
6771 late into the startup, so we cannot do the frame faces'
6772 initialization just yet. It will be done later by pc-win.el
6773 and internal_terminal_init. */
6774 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6776 && NILP (Vinitial_window_system
))
6778 /* For the initial frame, we don't have any way of knowing what
6779 are the foreground and background colors of the terminal. */
6780 struct frame
*sf
= SELECTED_FRAME();
6782 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6783 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6784 call0 (intern ("tty-set-up-initial-frame-faces"));
6790 /***********************************************************************
6792 ***********************************************************************/
6794 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6795 Sinternal_show_cursor
, 2, 2, 0,
6796 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6797 WINDOW nil means use the selected window. SHOW non-nil means
6798 show a cursor in WINDOW in the next redisplay. SHOW nil means
6799 don't show a cursor. */)
6801 Lisp_Object window
, show
;
6803 /* Don't change cursor state while redisplaying. This could confuse
6805 if (!redisplaying_p
)
6808 window
= selected_window
;
6810 CHECK_WINDOW (window
);
6812 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6819 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6820 Sinternal_show_cursor_p
, 0, 1, 0,
6821 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6822 WINDOW nil or omitted means report on the selected window. */)
6829 window
= selected_window
;
6831 CHECK_WINDOW (window
);
6833 w
= XWINDOW (window
);
6834 return w
->cursor_off_p
? Qnil
: Qt
;
6838 /***********************************************************************
6840 ***********************************************************************/
6845 defsubr (&Sredraw_frame
);
6846 defsubr (&Sredraw_display
);
6847 defsubr (&Sframe_or_buffer_changed_p
);
6848 defsubr (&Sopen_termscript
);
6850 defsubr (&Ssit_for
);
6851 defsubr (&Ssleep_for
);
6852 defsubr (&Ssend_string_to_terminal
);
6853 defsubr (&Sinternal_show_cursor
);
6854 defsubr (&Sinternal_show_cursor_p
);
6857 defsubr (&Sdump_redisplay_history
);
6860 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6861 staticpro (&frame_and_buffer_state
);
6863 Qdisplay_table
= intern ("display-table");
6864 staticpro (&Qdisplay_table
);
6865 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6866 staticpro (&Qredisplay_dont_pause
);
6868 DEFVAR_INT ("baud-rate", &baud_rate
,
6869 doc
: /* *The output baud rate of the terminal.
6870 On most systems, changing this value will affect the amount of padding
6871 and the other strategic decisions made during redisplay. */);
6873 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6874 doc
: /* *Non-nil means invert the entire frame display.
6875 This means everything is in inverse video which otherwise would not be. */);
6877 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6878 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6880 See also `ring-bell-function'. */);
6882 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6883 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6884 A non-nil value is useful if the terminal can automatically preserve
6885 Emacs's frame display when you reenter Emacs.
6886 It is up to you to set this variable if your terminal can do that. */);
6888 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6889 doc
: /* Name of the window system that Emacs uses for the first frame.
6890 The value is a symbol--for instance, `x' for X windows.
6891 The value is nil if Emacs is using a text-only terminal. */);
6893 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6894 doc
: /* The version number of the window system in use.
6895 For X windows, this is 10 or 11. */);
6897 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6898 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6900 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6901 doc
: /* Table defining how to output a glyph code to the frame.
6902 If not nil, this is a vector indexed by glyph code to define the glyph.
6903 Each element can be:
6904 integer: a glyph code which this glyph is an alias for.
6905 string: output this glyph using that string (not impl. in X windows).
6906 nil: this glyph mod 524288 is the code of a character to output,
6907 and this glyph / 524288 is the face number (see `face-id') to use
6908 while outputting it. */);
6909 Vglyph_table
= Qnil
;
6911 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6912 doc
: /* Display table to use for buffers that specify none.
6913 See `buffer-display-table' for more information. */);
6914 Vstandard_display_table
= Qnil
;
6916 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6917 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6918 redisplay_dont_pause
= 0;
6920 /* Initialize `window-system', unless init_display already decided it. */
6925 Vinitial_window_system
= Qnil
;
6926 Vwindow_system_version
= Qnil
;
6930 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6931 (do not change this comment) */