1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, 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_bitmap
!= b
->overlay_arrow_bitmap
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
->left_margin_cols
)
1904 != w
->desired_matrix
->left_margin_glyphs
)
1905 || (margin_glyphs_to_reserve (w
, dim
.width
,
1906 w
->right_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)
1974 / ch_height
) * w
->nrows_scale_factor
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)
2002 / ch_width
) * w
->ncols_scale_factor
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
);
2713 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2714 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2717 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2719 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2723 window_matrix
= w
->current_matrix
;
2725 /* For all rows in the window matrix and corresponding rows in the
2728 frame_y
= window_matrix
->matrix_y
;
2729 while (window_y
< window_matrix
->nrows
)
2731 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2732 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2733 int current_row_p
= window_matrix
== w
->current_matrix
;
2735 /* Fill up the frame row with spaces up to the left margin of the
2737 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2739 /* Fill up areas in the window matrix row with spaces. */
2740 fill_up_glyph_row_with_spaces (window_row
);
2742 /* If only part of W's desired matrix has been built, and
2743 window_row wasn't displayed, use the corresponding current
2745 if (window_matrix
== w
->desired_matrix
2746 && !window_row
->enabled_p
)
2748 window_row
= w
->current_matrix
->rows
+ window_y
;
2754 /* Copy window row to frame row. */
2755 bcopy (window_row
->glyphs
[0],
2756 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2757 window_matrix
->matrix_w
* sizeof (struct glyph
));
2761 xassert (window_row
->enabled_p
);
2763 /* Only when a desired row has been displayed, we want
2764 the corresponding frame row to be updated. */
2765 frame_row
->enabled_p
= 1;
2767 /* Maybe insert a vertical border between horizontally adjacent
2769 if (right_border_glyph
)
2771 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2772 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2776 /* Window row window_y must be a slice of frame row
2778 xassert (glyph_row_slice_p (window_row
, frame_row
));
2780 /* If rows are in sync, we don't have to copy glyphs because
2781 frame and window share glyphs. */
2783 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2784 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2788 /* Set number of used glyphs in the frame matrix. Since we fill
2789 up with spaces, and visit leaf windows from left to right it
2790 can be done simply. */
2791 frame_row
->used
[TEXT_AREA
]
2792 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2800 /* Given a user-specified glyph, possibly including a Lisp-level face
2801 ID, return a glyph that has a realized face ID.
2802 This is used for glyphs displayed specially and not part of the text;
2803 for instance, vertical separators, truncation markers, etc. */
2806 spec_glyph_lookup_face (w
, glyph
)
2810 int lface_id
= FAST_GLYPH_FACE (glyph
);
2811 /* Convert the glyph's specified face to a realized (cache) face. */
2814 int face_id
= merge_faces (XFRAME (w
->frame
),
2815 Qt
, lface_id
, DEFAULT_FACE_ID
);
2817 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2822 /* Add spaces to a glyph row ROW in a window matrix.
2824 Each row has the form:
2826 +---------+-----------------------------+------------+
2827 | left | text | right |
2828 +---------+-----------------------------+------------+
2830 Left and right marginal areas are optional. This function adds
2831 spaces to areas so that there are no empty holes between areas.
2832 In other words: If the right area is not empty, the text area
2833 is filled up with spaces up to the right area. If the text area
2834 is not empty, the left area is filled up.
2836 To be called for frame-based redisplay, only. */
2839 fill_up_glyph_row_with_spaces (row
)
2840 struct glyph_row
*row
;
2842 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2843 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2844 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2848 /* Fill area AREA of glyph row ROW with spaces. To be called for
2849 frame-based redisplay only. */
2852 fill_up_glyph_row_area_with_spaces (row
, area
)
2853 struct glyph_row
*row
;
2856 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2858 struct glyph
*end
= row
->glyphs
[area
+ 1];
2859 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2862 *text
++ = space_glyph
;
2863 row
->used
[area
] = text
- row
->glyphs
[area
];
2868 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2869 reached. In frame matrices only one area, TEXT_AREA, is used. */
2872 fill_up_frame_row_with_spaces (row
, upto
)
2873 struct glyph_row
*row
;
2876 int i
= row
->used
[TEXT_AREA
];
2877 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2880 glyph
[i
++] = space_glyph
;
2882 row
->used
[TEXT_AREA
] = i
;
2887 /**********************************************************************
2888 Mirroring operations on frame matrices in window matrices
2889 **********************************************************************/
2891 /* Set frame being updated via frame-based redisplay to F. This
2892 function must be called before updates to make explicit that we are
2893 working on frame matrices or not. */
2896 set_frame_matrix_frame (f
)
2899 frame_matrix_frame
= f
;
2903 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2904 DESIRED_MATRIX is the desired matrix corresponding to
2905 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2906 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2907 frame_matrix_frame is non-null, this indicates that the exchange is
2908 done in frame matrices, and that we have to perform analogous
2909 operations in window matrices of frame_matrix_frame. */
2912 make_current (desired_matrix
, current_matrix
, row
)
2913 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2916 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2917 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2918 int mouse_face_p
= current_row
->mouse_face_p
;
2920 /* Do current_row = desired_row. This exchanges glyph pointers
2921 between both rows, and does a structure assignment otherwise. */
2922 assign_row (current_row
, desired_row
);
2924 /* Enable current_row to mark it as valid. */
2925 current_row
->enabled_p
= 1;
2926 current_row
->mouse_face_p
= mouse_face_p
;
2928 /* If we are called on frame matrices, perform analogous operations
2929 for window matrices. */
2930 if (frame_matrix_frame
)
2931 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2935 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2936 W's frame which has been made current (by swapping pointers between
2937 current and desired matrix). Perform analogous operations in the
2938 matrices of leaf windows in the window tree rooted at W. */
2941 mirror_make_current (w
, frame_row
)
2947 if (!NILP (w
->hchild
))
2948 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2949 else if (!NILP (w
->vchild
))
2950 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2953 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2954 here because the checks performed in debug mode there
2955 will not allow the conversion. */
2956 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2958 /* If FRAME_ROW is within W, assign the desired row to the
2959 current row (exchanging glyph pointers). */
2960 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2962 struct glyph_row
*current_row
2963 = MATRIX_ROW (w
->current_matrix
, row
);
2964 struct glyph_row
*desired_row
2965 = MATRIX_ROW (w
->desired_matrix
, row
);
2967 if (desired_row
->enabled_p
)
2968 assign_row (current_row
, desired_row
);
2970 swap_glyph_pointers (desired_row
, current_row
);
2971 current_row
->enabled_p
= 1;
2975 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2980 /* Perform row dance after scrolling. We are working on the range of
2981 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2982 including) in MATRIX. COPY_FROM is a vector containing, for each
2983 row I in the range 0 <= I < NLINES, the index of the original line
2984 to move to I. This index is relative to the row range, i.e. 0 <=
2985 index < NLINES. RETAINED_P is a vector containing zero for each
2986 row 0 <= I < NLINES which is empty.
2988 This function is called from do_scrolling and do_direct_scrolling. */
2991 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2993 struct glyph_matrix
*matrix
;
2994 int unchanged_at_top
, nlines
;
2998 /* A copy of original rows. */
2999 struct glyph_row
*old_rows
;
3001 /* Rows to assign to. */
3002 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3006 /* Make a copy of the original rows. */
3007 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3008 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3010 /* Assign new rows, maybe clear lines. */
3011 for (i
= 0; i
< nlines
; ++i
)
3013 int enabled_before_p
= new_rows
[i
].enabled_p
;
3015 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3016 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3017 new_rows
[i
] = old_rows
[copy_from
[i
]];
3018 new_rows
[i
].enabled_p
= enabled_before_p
;
3020 /* RETAINED_P is zero for empty lines. */
3021 if (!retained_p
[copy_from
[i
]])
3022 new_rows
[i
].enabled_p
= 0;
3025 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3026 if (frame_matrix_frame
)
3027 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3028 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3032 /* Synchronize glyph pointers in the current matrix of window W with
3033 the current frame matrix. */
3036 sync_window_with_frame_matrix_rows (w
)
3039 struct frame
*f
= XFRAME (w
->frame
);
3040 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3041 int left
, right
, x
, width
;
3043 /* Preconditions: W must be a leaf window on a tty frame. */
3044 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3045 xassert (!FRAME_WINDOW_P (f
));
3047 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3048 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3049 x
= w
->current_matrix
->matrix_x
;
3050 width
= w
->current_matrix
->matrix_w
;
3052 window_row
= w
->current_matrix
->rows
;
3053 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3054 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3056 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3058 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3059 = frame_row
->glyphs
[0] + x
;
3060 window_row
->glyphs
[TEXT_AREA
]
3061 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3062 window_row
->glyphs
[LAST_AREA
]
3063 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3064 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3065 = window_row
->glyphs
[LAST_AREA
] - right
;
3070 /* Return the window in the window tree rooted in W containing frame
3071 row ROW. Value is null if none is found. */
3074 frame_row_to_window (w
, row
)
3078 struct window
*found
= NULL
;
3082 if (!NILP (w
->hchild
))
3083 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3084 else if (!NILP (w
->vchild
))
3085 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3086 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3087 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3090 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3097 /* Perform a line dance in the window tree rooted at W, after
3098 scrolling a frame matrix in mirrored_line_dance.
3100 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3101 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3102 COPY_FROM is a vector containing, for each row I in the range 0 <=
3103 I < NLINES, the index of the original line to move to I. This
3104 index is relative to the row range, i.e. 0 <= index < NLINES.
3105 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3109 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3111 int unchanged_at_top
, nlines
;
3117 if (!NILP (w
->hchild
))
3118 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3119 nlines
, copy_from
, retained_p
);
3120 else if (!NILP (w
->vchild
))
3121 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3122 nlines
, copy_from
, retained_p
);
3125 /* W is a leaf window, and we are working on its current
3127 struct glyph_matrix
*m
= w
->current_matrix
;
3129 struct glyph_row
*old_rows
;
3131 /* Make a copy of the original rows of matrix m. */
3132 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3133 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3135 for (i
= 0; i
< nlines
; ++i
)
3137 /* Frame relative line assigned to. */
3138 int frame_to
= i
+ unchanged_at_top
;
3140 /* Frame relative line assigned. */
3141 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3143 /* Window relative line assigned to. */
3144 int window_to
= frame_to
- m
->matrix_y
;
3146 /* Window relative line assigned. */
3147 int window_from
= frame_from
- m
->matrix_y
;
3149 /* Is assigned line inside window? */
3150 int from_inside_window_p
3151 = window_from
>= 0 && window_from
< m
->matrix_h
;
3153 /* Is assigned to line inside window? */
3154 int to_inside_window_p
3155 = window_to
>= 0 && window_to
< m
->matrix_h
;
3157 if (from_inside_window_p
&& to_inside_window_p
)
3159 /* Enabled setting before assignment. */
3160 int enabled_before_p
;
3162 /* Do the assignment. The enabled_p flag is saved
3163 over the assignment because the old redisplay did
3165 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3166 m
->rows
[window_to
] = old_rows
[window_from
];
3167 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3169 /* If frame line is empty, window line is empty, too. */
3170 if (!retained_p
[copy_from
[i
]])
3171 m
->rows
[window_to
].enabled_p
= 0;
3173 else if (to_inside_window_p
)
3175 /* A copy between windows. This is an infrequent
3176 case not worth optimizing. */
3177 struct frame
*f
= XFRAME (w
->frame
);
3178 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3180 struct glyph_matrix
*m2
;
3183 w2
= frame_row_to_window (root
, frame_from
);
3184 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3185 -nw', FROM_FRAME sometimes has no associated window.
3186 This check avoids a segfault if W2 is null. */
3189 m2
= w2
->current_matrix
;
3190 m2_from
= frame_from
- m2
->matrix_y
;
3191 copy_row_except_pointers (m
->rows
+ window_to
,
3192 m2
->rows
+ m2_from
);
3194 /* If frame line is empty, window line is empty, too. */
3195 if (!retained_p
[copy_from
[i
]])
3196 m
->rows
[window_to
].enabled_p
= 0;
3200 else if (from_inside_window_p
)
3204 /* If there was a copy between windows, make sure glyph
3205 pointers are in sync with the frame matrix. */
3207 sync_window_with_frame_matrix_rows (w
);
3209 /* Check that no pointers are lost. */
3213 /* Next window on same level. */
3214 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3221 /* Check that window and frame matrices agree about their
3222 understanding where glyphs of the rows are to find. For each
3223 window in the window tree rooted at W, check that rows in the
3224 matrices of leaf window agree with their frame matrices about
3228 check_window_matrix_pointers (w
)
3233 if (!NILP (w
->hchild
))
3234 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3235 else if (!NILP (w
->vchild
))
3236 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3239 struct frame
*f
= XFRAME (w
->frame
);
3240 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3241 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3244 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3249 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3250 a window and FRAME_MATRIX is the corresponding frame matrix. For
3251 each row in WINDOW_MATRIX check that it's a slice of the
3252 corresponding frame row. If it isn't, abort. */
3255 check_matrix_pointers (window_matrix
, frame_matrix
)
3256 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3258 /* Row number in WINDOW_MATRIX. */
3261 /* Row number corresponding to I in FRAME_MATRIX. */
3262 int j
= window_matrix
->matrix_y
;
3264 /* For all rows check that the row in the window matrix is a
3265 slice of the row in the frame matrix. If it isn't we didn't
3266 mirror an operation on the frame matrix correctly. */
3267 while (i
< window_matrix
->nrows
)
3269 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3270 frame_matrix
->rows
+ j
))
3276 #endif /* GLYPH_DEBUG != 0 */
3280 /**********************************************************************
3281 VPOS and HPOS translations
3282 **********************************************************************/
3286 /* Translate vertical position VPOS which is relative to window W to a
3287 vertical position relative to W's frame. */
3290 window_to_frame_vpos (w
, vpos
)
3294 struct frame
*f
= XFRAME (w
->frame
);
3296 xassert (!FRAME_WINDOW_P (f
));
3297 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3298 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3299 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3304 /* Translate horizontal position HPOS which is relative to window W to
3305 a horizontal position relative to W's frame. */
3308 window_to_frame_hpos (w
, hpos
)
3312 struct frame
*f
= XFRAME (w
->frame
);
3314 xassert (!FRAME_WINDOW_P (f
));
3315 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3319 #endif /* GLYPH_DEBUG */
3323 /**********************************************************************
3325 **********************************************************************/
3327 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3328 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3334 CHECK_LIVE_FRAME (frame
);
3337 /* Ignore redraw requests, if frame has no glyphs yet.
3338 (Implementation note: It still has to be checked why we are
3339 called so early here). */
3340 if (!glyphs_initialized_initially_p
)
3345 if (FRAME_MSDOS_P (f
))
3346 set_terminal_modes (FRAME_DISPLAY (f
));
3349 clear_current_matrices (f
);
3351 if (FRAME_TERMCAP_P (f
))
3352 fflush (FRAME_TTY (f
)->output
);
3353 windows_or_buffers_changed
++;
3354 /* Mark all windows as inaccurate, so that every window will have
3355 its redisplay done. */
3356 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3357 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3363 /* Redraw frame F. This is nothing more than a call to the Lisp
3364 function redraw-frame. */
3371 XSETFRAME (frame
, f
);
3372 Fredraw_frame (frame
);
3376 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3377 doc
: /* Clear and redisplay all visible frames. */)
3380 Lisp_Object tail
, frame
;
3382 FOR_EACH_FRAME (tail
, frame
)
3383 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3384 Fredraw_frame (frame
);
3390 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3391 visible frames marked as garbaged. */
3394 redraw_garbaged_frames ()
3396 Lisp_Object tail
, frame
;
3398 FOR_EACH_FRAME (tail
, frame
)
3399 if (FRAME_VISIBLE_P (XFRAME (frame
))
3400 && FRAME_GARBAGED_P (XFRAME (frame
)))
3401 Fredraw_frame (frame
);
3406 /***********************************************************************
3408 ***********************************************************************/
3410 /* Try to update display and current glyph matrix directly.
3412 This function is called after a character G has been inserted into
3413 current_buffer. It tries to update the current glyph matrix and
3414 perform appropriate screen output to reflect the insertion. If it
3415 succeeds, the global flag redisplay_performed_directly_p will be
3416 set to 1, and thereby prevent the more costly general redisplay
3417 from running (see redisplay_internal).
3419 This function is not called for `hairy' character insertions.
3420 In particular, it is not called when after or before change
3421 functions exist, like they are used by font-lock. See keyboard.c
3422 for details where this function is called. */
3425 direct_output_for_insert (g
)
3428 register struct frame
*f
= SELECTED_FRAME ();
3429 struct window
*w
= XWINDOW (selected_window
);
3431 struct glyph_row
*glyph_row
;
3432 struct glyph
*glyphs
, *glyph
, *end
;
3434 /* Non-null means that redisplay of W is based on window matrices. */
3435 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3436 /* Non-null means we are in overwrite mode. */
3437 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3439 struct text_pos pos
;
3440 int delta
, delta_bytes
;
3442 /* Not done directly. */
3443 redisplay_performed_directly_p
= 0;
3445 /* Quickly give up for some common cases. */
3446 if (cursor_in_echo_area
3447 /* Give up if fonts have changed. */
3449 /* Give up if face attributes have been changed. */
3450 || face_change_count
3451 /* Give up if cursor position not really known. */
3452 || !display_completed
3453 /* Give up if buffer appears in two places. */
3454 || buffer_shared
> 1
3455 /* Give up if currently displaying a message instead of the
3456 minibuffer contents. */
3457 || (EQ (selected_window
, minibuf_window
)
3458 && EQ (minibuf_window
, echo_area_window
))
3459 /* Give up for hscrolled mini-buffer because display of the prompt
3460 is handled specially there (see display_line). */
3461 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3462 /* Give up if overwriting in the middle of a line. */
3465 && FETCH_BYTE (PT
) != '\n')
3466 /* Give up for tabs and line ends. */
3470 /* Give up if unable to display the cursor in the window. */
3471 || w
->cursor
.vpos
< 0
3472 /* Give up if we are showing a message or just cleared the message
3473 because we might need to resize the echo area window. */
3474 || !NILP (echo_area_buffer
[0])
3475 || !NILP (echo_area_buffer
[1])
3476 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3477 /* Can't do it in a continued line because continuation
3478 lines would change. */
3479 (glyph_row
->continued_p
3480 || glyph_row
->exact_window_width_line_p
3481 /* Can't use this method if the line overlaps others or is
3482 overlapped by others because these other lines would
3483 have to be redisplayed. */
3484 || glyph_row
->overlapping_p
3485 || glyph_row
->overlapped_p
))
3486 /* Can't do it for partial width windows on terminal frames
3487 because we can't clear to eol in such a window. */
3488 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3491 /* If we can't insert glyphs, we can use this method only
3492 at the end of a line. */
3493 if (!FRAME_CHAR_INS_DEL_OK (f
))
3494 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3497 /* Set up a display iterator structure for W. Glyphs will be
3498 produced in scratch_glyph_row. Current position is W's cursor
3500 clear_glyph_row (&scratch_glyph_row
);
3501 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3502 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3503 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3506 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3507 if (glyph_row
->mouse_face_p
)
3510 /* Give up if highlighting trailing whitespace and we have trailing
3511 whitespace in glyph_row. We would have to remove the trailing
3512 whitespace face in that case. */
3513 if (!NILP (Vshow_trailing_whitespace
)
3514 && glyph_row
->used
[TEXT_AREA
])
3518 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3519 if (last
->type
== STRETCH_GLYPH
3520 || (last
->type
== CHAR_GLYPH
3521 && last
->u
.ch
== ' '))
3525 /* Give up if there are overlay strings at pos. This would fail
3526 if the overlay string has newlines in it. */
3527 if (STRINGP (it
.string
))
3530 it
.hpos
= w
->cursor
.hpos
;
3531 it
.vpos
= w
->cursor
.vpos
;
3532 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3533 it
.current_y
= w
->cursor
.y
;
3534 it
.end_charpos
= PT
;
3535 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3536 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3538 /* More than one display element may be returned for PT - 1 if
3539 (i) it's a control character which is translated into `\003' or
3540 `^C', or (ii) it has a display table entry, or (iii) it's a
3541 combination of both. */
3542 delta
= delta_bytes
= 0;
3543 while (get_next_display_element (&it
))
3545 PRODUCE_GLYPHS (&it
);
3547 /* Give up if glyph doesn't fit completely on the line. */
3548 if (it
.current_x
>= it
.last_visible_x
)
3551 /* Give up if new glyph has different ascent or descent than
3552 the original row, or if it is not a character glyph. */
3553 if (glyph_row
->ascent
!= it
.ascent
3554 || glyph_row
->height
!= it
.ascent
+ it
.descent
3555 || glyph_row
->phys_ascent
!= it
.phys_ascent
3556 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3557 || it
.what
!= IT_CHARACTER
)
3561 delta_bytes
+= it
.len
;
3562 set_iterator_to_next (&it
, 1);
3565 /* Give up if we hit the right edge of the window. We would have
3566 to insert truncation or continuation glyphs. */
3567 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3568 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3571 /* Give up if there is a \t following in the line. */
3573 it2
.end_charpos
= ZV
;
3574 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3575 while (get_next_display_element (&it2
)
3576 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3580 set_iterator_to_next (&it2
, 1);
3583 /* Number of new glyphs produced. */
3584 n
= it
.glyph_row
->used
[TEXT_AREA
];
3586 /* Start and end of glyphs in original row. */
3587 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3588 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3590 /* Make room for new glyphs, then insert them. */
3591 xassert (end
- glyphs
- n
>= 0);
3592 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3593 (end
- glyphs
- n
) * sizeof (*end
));
3594 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3595 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3596 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3598 /* Compute new line width. */
3599 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3600 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3601 glyph_row
->pixel_width
= glyph_row
->x
;
3604 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3608 /* Increment buffer positions for glyphs following the newly
3610 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3611 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3612 glyph
->charpos
+= delta
;
3614 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3616 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3617 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3620 /* Adjust positions in lines following the one we are in. */
3621 increment_matrix_positions (w
->current_matrix
,
3623 w
->current_matrix
->nrows
,
3624 delta
, delta_bytes
);
3626 glyph_row
->contains_overlapping_glyphs_p
3627 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3629 glyph_row
->displays_text_p
= 1;
3630 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3631 XFASTINT (w
->window_end_vpos
)));
3633 if (!NILP (Vshow_trailing_whitespace
))
3634 highlight_trailing_whitespace (it
.f
, glyph_row
);
3636 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3637 In the middle, we have to insert glyphs. Note that this is now
3638 implemented for X frames. The implementation uses updated_window
3640 updated_row
= glyph_row
;
3641 updated_area
= TEXT_AREA
;
3645 FRAME_RIF (f
)->update_window_begin_hook (w
);
3647 if (glyphs
== end
- n
3648 /* In front of a space added by append_space. */
3649 || (glyphs
== end
- n
- 1
3650 && (end
- n
)->charpos
<= 0))
3651 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3653 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3657 if (glyphs
== end
- n
)
3658 write_glyphs (f
, glyphs
, n
);
3660 insert_glyphs (f
, glyphs
, n
);
3663 w
->cursor
.hpos
+= n
;
3664 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3665 xassert (w
->cursor
.hpos
>= 0
3666 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3668 /* How to set the cursor differs depending on whether we are
3669 using a frame matrix or a window matrix. Note that when
3670 a frame matrix is used, cursor_to expects frame coordinates,
3671 and the X and Y parameters are not used. */
3672 if (window_redisplay_p
)
3673 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3674 w
->cursor
.y
, w
->cursor
.x
);
3678 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3679 + (INTEGERP (w
->left_margin_cols
)
3680 ? XFASTINT (w
->left_margin_cols
)
3682 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3683 cursor_to (f
, y
, x
);
3686 #ifdef HAVE_WINDOW_SYSTEM
3687 update_window_fringes (w
, 0);
3691 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3694 if (FRAME_TERMCAP_P (f
))
3695 fflush (FRAME_TTY (f
)->output
);
3697 TRACE ((stderr
, "direct output for insert\n"));
3698 mark_window_display_accurate (it
.window
, 1);
3699 redisplay_performed_directly_p
= 1;
3704 /* Perform a direct display update for moving PT by N positions
3705 left or right. N < 0 means a movement backwards. This function
3706 is currently only called for N == 1 or N == -1. */
3709 direct_output_forward_char (n
)
3712 struct frame
*f
= SELECTED_FRAME ();
3713 struct window
*w
= XWINDOW (selected_window
);
3714 struct glyph_row
*row
;
3716 /* Give up if point moved out of or into a composition. */
3717 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3718 current_buffer
, PT
))
3721 /* Give up if face attributes have been changed. */
3722 if (face_change_count
)
3725 /* Give up if current matrix is not up to date or we are
3726 displaying a message. */
3727 if (!display_completed
|| cursor_in_echo_area
)
3730 /* Give up if the buffer's direction is reversed. */
3731 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3734 /* Can't use direct output if highlighting a region. */
3735 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3738 /* Can't use direct output if highlighting trailing whitespace. */
3739 if (!NILP (Vshow_trailing_whitespace
))
3742 /* Give up if we are showing a message or just cleared the message
3743 because we might need to resize the echo area window. */
3744 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3747 /* Give up if currently displaying a message instead of the
3748 minibuffer contents. */
3749 if (XWINDOW (minibuf_window
) == w
3750 && EQ (minibuf_window
, echo_area_window
))
3753 /* Give up if we don't know where the cursor is. */
3754 if (w
->cursor
.vpos
< 0)
3757 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3759 /* Give up if PT is outside of the last known cursor row. */
3760 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3761 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3764 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3766 w
->last_cursor
= w
->cursor
;
3767 XSETFASTINT (w
->last_point
, PT
);
3769 xassert (w
->cursor
.hpos
>= 0
3770 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3772 if (FRAME_WINDOW_P (f
))
3773 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3774 w
->cursor
.y
, w
->cursor
.x
);
3778 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3779 + (INTEGERP (w
->left_margin_cols
)
3780 ? XFASTINT (w
->left_margin_cols
)
3782 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3783 cursor_to (f
, y
, x
);
3786 if (FRAME_TERMCAP_P (f
))
3787 fflush (FRAME_TTY (f
)->output
);
3788 redisplay_performed_directly_p
= 1;
3794 /***********************************************************************
3796 ***********************************************************************/
3798 /* Update frame F based on the data in desired matrices.
3800 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3801 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3804 Value is non-zero if redisplay was stopped due to pending input. */
3807 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3810 int inhibit_hairy_id_p
;
3812 /* 1 means display has been paused because of pending input. */
3814 struct window
*root_window
= XWINDOW (f
->root_window
);
3816 if (FRAME_WINDOW_P (f
))
3818 /* We are working on window matrix basis. All windows whose
3819 flag must_be_updated_p is set have to be updated. */
3821 /* Record that we are not working on frame matrices. */
3822 set_frame_matrix_frame (NULL
);
3824 /* Update all windows in the window tree of F, maybe stopping
3825 when pending input is detected. */
3828 /* Update the menu bar on X frames that don't have toolkit
3830 if (WINDOWP (f
->menu_bar_window
))
3831 update_window (XWINDOW (f
->menu_bar_window
), 1);
3833 /* Update the tool-bar window, if present. */
3834 if (WINDOWP (f
->tool_bar_window
))
3836 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3838 /* Update tool-bar window. */
3839 if (w
->must_be_updated_p
)
3843 update_window (w
, 1);
3844 w
->must_be_updated_p
= 0;
3846 /* Swap tool-bar strings. We swap because we want to
3848 tem
= f
->current_tool_bar_string
;
3849 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3850 f
->desired_tool_bar_string
= tem
;
3855 /* Update windows. */
3856 paused_p
= update_window_tree (root_window
, force_p
);
3859 /* This flush is a performance bottleneck under X,
3860 and it doesn't seem to be necessary anyway (in general).
3861 It is necessary when resizing the window with the mouse, or
3862 at least the fringes are not redrawn in a timely manner. ++kfs */
3863 if (f
->force_flush_display_p
)
3865 FRAME_RIF (f
)->flush_display (f
);
3866 f
->force_flush_display_p
= 0;
3871 /* We are working on frame matrix basis. Set the frame on whose
3872 frame matrix we operate. */
3873 set_frame_matrix_frame (f
);
3875 /* Build F's desired matrix from window matrices. */
3876 build_frame_matrix (f
);
3878 /* Update the display */
3880 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3883 if (FRAME_TERMCAP_P (f
))
3885 if (FRAME_TTY (f
)->termscript
)
3886 fflush (FRAME_TTY (f
)->termscript
);
3887 fflush (FRAME_TTY (f
)->output
);
3890 /* Check window matrices for lost pointers. */
3892 check_window_matrix_pointers (root_window
);
3893 add_frame_display_history (f
, paused_p
);
3897 /* Reset flags indicating that a window should be updated. */
3898 set_window_update_flags (root_window
, 0);
3900 display_completed
= !paused_p
;
3906 /************************************************************************
3907 Window-based updates
3908 ************************************************************************/
3910 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3911 don't stop updating when input is pending. */
3914 update_window_tree (w
, force_p
)
3920 while (w
&& !paused_p
)
3922 if (!NILP (w
->hchild
))
3923 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3924 else if (!NILP (w
->vchild
))
3925 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3926 else if (w
->must_be_updated_p
)
3927 paused_p
|= update_window (w
, force_p
);
3929 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3936 /* Update window W if its flag must_be_updated_p is non-zero. If
3937 FORCE_P is non-zero, don't stop updating if input is pending. */
3940 update_single_window (w
, force_p
)
3944 if (w
->must_be_updated_p
)
3946 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3948 /* Record that this is not a frame-based redisplay. */
3949 set_frame_matrix_frame (NULL
);
3953 update_window (w
, force_p
);
3956 /* Reset flag in W. */
3957 w
->must_be_updated_p
= 0;
3962 /* Redraw lines from the current matrix of window W that are
3963 overlapped by other rows. YB is bottom-most y-position in W. */
3966 redraw_overlapped_rows (w
, yb
)
3971 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3973 /* If rows overlapping others have been changed, the rows being
3974 overlapped have to be redrawn. This won't draw lines that have
3975 already been drawn in update_window_line because overlapped_p in
3976 desired rows is 0, so after row assignment overlapped_p in
3977 current rows is 0. */
3978 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3980 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3982 if (!row
->enabled_p
)
3984 else if (row
->mode_line_p
)
3987 if (row
->overlapped_p
)
3989 enum glyph_row_area area
;
3991 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3994 updated_area
= area
;
3995 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3996 area
== TEXT_AREA
? row
->x
: 0);
3997 if (row
->used
[area
])
3998 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4000 FRAME_RIF (f
)->clear_end_of_line (-1);
4003 row
->overlapped_p
= 0;
4006 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4012 /* Redraw lines from the current matrix of window W that overlap
4013 others. YB is bottom-most y-position in W. */
4016 redraw_overlapping_rows (w
, yb
)
4021 struct glyph_row
*row
;
4022 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4024 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4026 row
= w
->current_matrix
->rows
+ i
;
4028 if (!row
->enabled_p
)
4030 else if (row
->mode_line_p
)
4033 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4035 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4037 if (row
->used
[LEFT_MARGIN_AREA
])
4038 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
4040 if (row
->used
[TEXT_AREA
])
4041 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
4043 if (row
->used
[RIGHT_MARGIN_AREA
])
4044 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4046 /* Record in neighbour rows that ROW overwrites part of their
4048 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4049 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4050 if ((row
->phys_height
- row
->phys_ascent
4051 > row
->height
- row
->ascent
)
4053 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4064 /* Check that no row in the current matrix of window W is enabled
4065 which is below what's displayed in the window. */
4068 check_current_matrix_flags (w
)
4071 int last_seen_p
= 0;
4072 int i
, yb
= window_text_bottom_y (w
);
4074 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4076 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4077 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4079 else if (last_seen_p
&& row
->enabled_p
)
4084 #endif /* GLYPH_DEBUG */
4087 /* Update display of window W. FORCE_P non-zero means that we should
4088 not stop when detecting pending input. */
4091 update_window (w
, force_p
)
4095 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4097 int preempt_count
= baud_rate
/ 2400 + 1;
4098 extern int input_pending
;
4099 extern Lisp_Object do_mouse_tracking
;
4100 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4102 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4104 /* Check that W's frame doesn't have glyph matrices. */
4105 xassert (FRAME_WINDOW_P (f
));
4108 /* Check pending input the first time so that we can quickly return. */
4109 if (redisplay_dont_pause
)
4112 detect_input_pending_ignore_squeezables ();
4114 /* If forced to complete the update, or if no input is pending, do
4116 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4118 struct glyph_row
*row
, *end
;
4119 struct glyph_row
*mode_line_row
;
4120 struct glyph_row
*header_line_row
;
4121 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4123 rif
->update_window_begin_hook (w
);
4124 yb
= window_text_bottom_y (w
);
4126 /* If window has a header line, update it before everything else.
4127 Adjust y-positions of other rows by the header line height. */
4128 row
= desired_matrix
->rows
;
4129 end
= row
+ desired_matrix
->nrows
- 1;
4131 if (row
->mode_line_p
)
4133 header_line_row
= row
;
4137 header_line_row
= NULL
;
4139 /* Update the mode line, if necessary. */
4140 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4141 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4143 mode_line_row
->y
= yb
;
4144 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4146 &mouse_face_overwritten_p
);
4150 /* Find first enabled row. Optimizations in redisplay_internal
4151 may lead to an update with only one row enabled. There may
4152 be also completely empty matrices. */
4153 while (row
< end
&& !row
->enabled_p
)
4156 /* Try reusing part of the display by copying. */
4157 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4159 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4162 /* All rows were found to be equal. */
4168 /* We've scrolled the display. */
4174 /* Update the rest of the lines. */
4175 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4178 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4181 /* We'll have to play a little bit with when to
4182 detect_input_pending. If it's done too often,
4183 scrolling large windows with repeated scroll-up
4184 commands will too quickly pause redisplay. */
4185 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4186 detect_input_pending_ignore_squeezables ();
4188 changed_p
|= update_window_line (w
, vpos
,
4189 &mouse_face_overwritten_p
);
4191 /* Mark all rows below the last visible one in the current
4192 matrix as invalid. This is necessary because of
4193 variable line heights. Consider the case of three
4194 successive redisplays, where the first displays 5
4195 lines, the second 3 lines, and the third 5 lines again.
4196 If the second redisplay wouldn't mark rows in the
4197 current matrix invalid, the third redisplay might be
4198 tempted to optimize redisplay based on lines displayed
4199 in the first redisplay. */
4200 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4201 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4202 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4205 /* Was display preempted? */
4206 paused_p
= row
< end
;
4210 /* Update the header line after scrolling because a new header
4211 line would otherwise overwrite lines at the top of the window
4212 that can be scrolled. */
4213 if (header_line_row
&& header_line_row
->enabled_p
)
4215 header_line_row
->y
= 0;
4216 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4220 /* Fix the appearance of overlapping/overlapped rows. */
4221 if (!paused_p
&& !w
->pseudo_window_p
)
4223 if (changed_p
&& rif
->fix_overlapping_area
)
4225 redraw_overlapped_rows (w
, yb
);
4226 redraw_overlapping_rows (w
, yb
);
4229 /* Make cursor visible at cursor position of W. */
4230 set_window_cursor_after_update (w
);
4232 #if 0 /* Check that current matrix invariants are satisfied. This is
4233 for debugging only. See the comment of check_matrix_invariants. */
4234 IF_DEBUG (check_matrix_invariants (w
));
4239 /* Remember the redisplay method used to display the matrix. */
4240 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4243 #ifdef HAVE_WINDOW_SYSTEM
4244 update_window_fringes (w
, 0);
4247 /* End the update of window W. Don't set the cursor if we
4248 paused updating the display because in this case,
4249 set_window_cursor_after_update hasn't been called, and
4250 output_cursor doesn't contain the cursor location. */
4251 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4257 /* check_current_matrix_flags (w); */
4258 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4261 clear_glyph_matrix (desired_matrix
);
4267 /* Update the display of area AREA in window W, row number VPOS.
4268 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4271 update_marginal_area (w
, area
, vpos
)
4275 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4276 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4278 /* Let functions in xterm.c know what area subsequent X positions
4279 will be relative to. */
4280 updated_area
= area
;
4282 /* Set cursor to start of glyphs, write them, and clear to the end
4283 of the area. I don't think that something more sophisticated is
4284 necessary here, since marginal areas will not be the default. */
4285 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4286 if (desired_row
->used
[area
])
4287 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4288 rif
->clear_end_of_line (-1);
4292 /* Update the display of the text area of row VPOS in window W.
4293 Value is non-zero if display has changed. */
4296 update_text_area (w
, vpos
)
4300 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4301 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4302 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4305 /* Let functions in xterm.c know what area subsequent X positions
4306 will be relative to. */
4307 updated_area
= TEXT_AREA
;
4309 /* If rows are at different X or Y, or rows have different height,
4310 or the current row is marked invalid, write the entire line. */
4311 if (!current_row
->enabled_p
4312 || desired_row
->y
!= current_row
->y
4313 || desired_row
->ascent
!= current_row
->ascent
4314 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4315 || desired_row
->phys_height
!= current_row
->phys_height
4316 || desired_row
->visible_height
!= current_row
->visible_height
4317 || current_row
->overlapped_p
4318 || current_row
->mouse_face_p
4319 || current_row
->x
!= desired_row
->x
)
4321 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4323 if (desired_row
->used
[TEXT_AREA
])
4324 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4325 desired_row
->used
[TEXT_AREA
]);
4327 /* Clear to end of window. */
4328 rif
->clear_end_of_line (-1);
4331 /* This erases the cursor. We do this here because
4332 notice_overwritten_cursor cannot easily check this, which
4333 might indicate that the whole functionality of
4334 notice_overwritten_cursor would better be implemented here.
4335 On the other hand, we need notice_overwritten_cursor as long
4336 as mouse highlighting is done asynchronously outside of
4338 if (vpos
== w
->phys_cursor
.vpos
)
4339 w
->phys_cursor_on_p
= 0;
4344 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4345 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4346 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4347 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4349 /* If the desired row extends its face to the text area end,
4350 make sure we write at least one glyph, so that the face
4351 extension actually takes place. */
4352 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4355 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4359 /* Loop over glyphs that current and desired row may have
4365 /* Skip over glyphs that both rows have in common. These
4366 don't have to be written. We can't skip if the last
4367 current glyph overlaps the glyph to its right. For
4368 example, consider a current row of `if ' with the `f' in
4369 Courier bold so that it overlaps the ` ' to its right.
4370 If the desired row is ` ', we would skip over the space
4371 after the `if' and there would remain a pixel from the
4372 `f' on the screen. */
4373 if (overlapping_glyphs_p
&& i
> 0)
4375 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4378 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4380 can_skip_p
= right
== 0;
4386 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4388 x
+= desired_glyph
->pixel_width
;
4389 ++desired_glyph
, ++current_glyph
, ++i
;
4392 /* Consider the case that the current row contains "xxx
4393 ppp ggg" in italic Courier font, and the desired row
4394 is "xxx ggg". The character `p' has lbearing, `g'
4395 has not. The loop above will stop in front of the
4396 first `p' in the current row. If we would start
4397 writing glyphs there, we wouldn't erase the lbearing
4398 of the `p'. The rest of the lbearing problem is then
4399 taken care of by draw_glyphs. */
4400 if (overlapping_glyphs_p
4402 && i
< current_row
->used
[TEXT_AREA
]
4403 && (current_row
->used
[TEXT_AREA
]
4404 != desired_row
->used
[TEXT_AREA
]))
4408 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4410 while (left
> 0 && i
> 0)
4412 --i
, --desired_glyph
, --current_glyph
;
4413 x
-= desired_glyph
->pixel_width
;
4414 left
-= desired_glyph
->pixel_width
;
4419 /* Try to avoid writing the entire rest of the desired row
4420 by looking for a resync point. This mainly prevents
4421 mode line flickering in the case the mode line is in
4422 fixed-pitch font, which it usually will be. */
4423 if (i
< desired_row
->used
[TEXT_AREA
])
4425 int start_x
= x
, start_hpos
= i
;
4426 struct glyph
*start
= desired_glyph
;
4428 int skip_first_p
= !can_skip_p
;
4430 /* Find the next glyph that's equal again. */
4433 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4436 x
+= desired_glyph
->pixel_width
;
4437 current_x
+= current_glyph
->pixel_width
;
4438 ++desired_glyph
, ++current_glyph
, ++i
;
4442 if (i
== start_hpos
|| x
!= current_x
)
4446 desired_glyph
= start
;
4450 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4451 rif
->write_glyphs (start
, i
- start_hpos
);
4456 /* Write the rest. */
4457 if (i
< desired_row
->used
[TEXT_AREA
])
4459 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4460 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4464 /* Maybe clear to end of line. */
4465 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4467 /* If new row extends to the end of the text area, nothing
4468 has to be cleared, if and only if we did a write_glyphs
4469 above. This is made sure by setting desired_stop_pos
4470 appropriately above. */
4471 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4473 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4475 /* If old row extends to the end of the text area, clear. */
4476 if (i
>= desired_row
->used
[TEXT_AREA
])
4477 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4478 desired_row
->pixel_width
);
4479 rif
->clear_end_of_line (-1);
4482 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4484 /* Otherwise clear to the end of the old row. Everything
4485 after that position should be clear already. */
4488 if (i
>= desired_row
->used
[TEXT_AREA
])
4489 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4490 desired_row
->pixel_width
);
4492 /* If cursor is displayed at the end of the line, make sure
4493 it's cleared. Nowadays we don't have a phys_cursor_glyph
4494 with which to erase the cursor (because this method
4495 doesn't work with lbearing/rbearing), so we must do it
4497 if (vpos
== w
->phys_cursor
.vpos
4498 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4500 w
->phys_cursor_on_p
= 0;
4504 x
= current_row
->pixel_width
;
4505 rif
->clear_end_of_line (x
);
4514 /* Update row VPOS in window W. Value is non-zero if display has been
4518 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4520 int vpos
, *mouse_face_overwritten_p
;
4522 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4523 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4524 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4527 /* Set the row being updated. This is important to let xterm.c
4528 know what line height values are in effect. */
4529 updated_row
= desired_row
;
4531 /* A row can be completely invisible in case a desired matrix was
4532 built with a vscroll and then make_cursor_line_fully_visible shifts
4533 the matrix. Make sure to make such rows current anyway, since
4534 we need the correct y-position, for example, in the current matrix. */
4535 if (desired_row
->mode_line_p
4536 || desired_row
->visible_height
> 0)
4538 xassert (desired_row
->enabled_p
);
4540 /* Update display of the left margin area, if there is one. */
4541 if (!desired_row
->full_width_p
4542 && !NILP (w
->left_margin_cols
))
4545 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4548 /* Update the display of the text area. */
4549 if (update_text_area (w
, vpos
))
4552 if (current_row
->mouse_face_p
)
4553 *mouse_face_overwritten_p
= 1;
4556 /* Update display of the right margin area, if there is one. */
4557 if (!desired_row
->full_width_p
4558 && !NILP (w
->right_margin_cols
))
4561 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4564 /* Draw truncation marks etc. */
4565 if (!current_row
->enabled_p
4566 || desired_row
->y
!= current_row
->y
4567 || desired_row
->visible_height
!= current_row
->visible_height
4568 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4569 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4570 || current_row
->redraw_fringe_bitmaps_p
4571 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4572 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4573 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4574 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4575 rif
->after_update_window_line_hook (desired_row
);
4578 /* Update current_row from desired_row. */
4579 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4585 /* Set the cursor after an update of window W. This function may only
4586 be called from update_window. */
4589 set_window_cursor_after_update (w
)
4592 struct frame
*f
= XFRAME (w
->frame
);
4593 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4594 int cx
, cy
, vpos
, hpos
;
4596 /* Not intended for frame matrix updates. */
4597 xassert (FRAME_WINDOW_P (f
));
4599 if (cursor_in_echo_area
4600 && !NILP (echo_area_buffer
[0])
4601 /* If we are showing a message instead of the mini-buffer,
4602 show the cursor for the message instead. */
4603 && XWINDOW (minibuf_window
) == w
4604 && EQ (minibuf_window
, echo_area_window
)
4605 /* These cases apply only to the frame that contains
4606 the active mini-buffer window. */
4607 && FRAME_HAS_MINIBUF_P (f
)
4608 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4610 cx
= cy
= vpos
= hpos
= 0;
4612 if (cursor_in_echo_area
>= 0)
4614 /* If the mini-buffer is several lines high, find the last
4615 line that has any text on it. Note: either all lines
4616 are enabled or none. Otherwise we wouldn't be able to
4618 struct glyph_row
*row
, *last_row
;
4619 struct glyph
*glyph
;
4620 int yb
= window_text_bottom_y (w
);
4623 row
= w
->current_matrix
->rows
;
4624 while (row
->enabled_p
4625 && (last_row
== NULL
4626 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4628 if (row
->used
[TEXT_AREA
]
4629 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4636 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4637 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4639 while (last
> start
&& last
->charpos
< 0)
4642 for (glyph
= start
; glyph
< last
; ++glyph
)
4644 cx
+= glyph
->pixel_width
;
4649 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4657 hpos
= w
->cursor
.hpos
;
4658 vpos
= w
->cursor
.vpos
;
4661 /* Window cursor can be out of sync for horizontally split windows. */
4662 hpos
= max (0, hpos
);
4663 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4664 vpos
= max (0, vpos
);
4665 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4666 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4670 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4671 tree rooted at W. */
4674 set_window_update_flags (w
, on_p
)
4680 if (!NILP (w
->hchild
))
4681 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4682 else if (!NILP (w
->vchild
))
4683 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4685 w
->must_be_updated_p
= on_p
;
4687 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4693 /***********************************************************************
4694 Window-Based Scrolling
4695 ***********************************************************************/
4697 /* Structure describing rows in scrolling_window. */
4701 /* Number of occurrences of this row in desired and current matrix. */
4702 int old_uses
, new_uses
;
4704 /* Vpos of row in new matrix. */
4705 int new_line_number
;
4707 /* Bucket index of this row_entry in the hash table row_table. */
4710 /* The row described by this entry. */
4711 struct glyph_row
*row
;
4713 /* Hash collision chain. */
4714 struct row_entry
*next
;
4717 /* A pool to allocate row_entry structures from, and the size of the
4718 pool. The pool is reallocated in scrolling_window when we find
4719 that we need a larger one. */
4721 static struct row_entry
*row_entry_pool
;
4722 static int row_entry_pool_size
;
4724 /* Index of next free entry in row_entry_pool. */
4726 static int row_entry_idx
;
4728 /* The hash table used during scrolling, and the table's size. This
4729 table is used to quickly identify equal rows in the desired and
4732 static struct row_entry
**row_table
;
4733 static int row_table_size
;
4735 /* Vectors of pointers to row_entry structures belonging to the
4736 current and desired matrix, and the size of the vectors. */
4738 static struct row_entry
**old_lines
, **new_lines
;
4739 static int old_lines_size
, new_lines_size
;
4741 /* A pool to allocate run structures from, and its size. */
4743 static struct run
*run_pool
;
4744 static int runs_size
;
4746 /* A vector of runs of lines found during scrolling. */
4748 static struct run
**runs
;
4750 /* Add glyph row ROW to the scrolling hash table during the scrolling
4753 static INLINE
struct row_entry
*
4754 add_row_entry (w
, row
)
4756 struct glyph_row
*row
;
4758 struct row_entry
*entry
;
4759 int i
= row
->hash
% row_table_size
;
4761 entry
= row_table
[i
];
4762 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4763 entry
= entry
->next
;
4767 entry
= row_entry_pool
+ row_entry_idx
++;
4769 entry
->old_uses
= entry
->new_uses
= 0;
4770 entry
->new_line_number
= 0;
4772 entry
->next
= row_table
[i
];
4773 row_table
[i
] = entry
;
4780 /* Try to reuse part of the current display of W by scrolling lines.
4781 HEADER_LINE_P non-zero means W has a header line.
4783 The algorithm is taken from Communications of the ACM, Apr78 "A
4784 Technique for Isolating Differences Between Files." It should take
4787 A short outline of the steps of the algorithm
4789 1. Skip lines equal at the start and end of both matrices.
4791 2. Enter rows in the current and desired matrix into a symbol
4792 table, counting how often they appear in both matrices.
4794 3. Rows that appear exactly once in both matrices serve as anchors,
4795 i.e. we assume that such lines are likely to have been moved.
4797 4. Starting from anchor lines, extend regions to be scrolled both
4798 forward and backward.
4802 -1 if all rows were found to be equal.
4803 0 to indicate that we did not scroll the display, or
4804 1 if we did scroll. */
4807 scrolling_window (w
, header_line_p
)
4811 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4812 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4813 int yb
= window_text_bottom_y (w
);
4814 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4815 int nruns
, nbytes
, n
, run_idx
;
4816 struct row_entry
*entry
;
4817 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4819 /* Skip over rows equal at the start. */
4820 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4822 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4823 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4827 && !d
->redraw_fringe_bitmaps_p
4829 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4830 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4831 && row_equal_p (w
, c
, d
, 1))
4840 /* Give up if some rows in the desired matrix are not enabled. */
4841 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4844 first_old
= first_new
= i
;
4846 /* Set last_new to the index + 1 of the last enabled row in the
4849 while (i
< desired_matrix
->nrows
- 1
4850 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4851 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4854 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4859 /* Set last_old to the index + 1 of the last enabled row in the
4860 current matrix. We don't look at the enabled flag here because
4861 we plan to reuse part of the display even if other parts are
4864 while (i
< current_matrix
->nrows
- 1)
4866 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4875 /* Skip over rows equal at the bottom. */
4878 while (i
- 1 > first_new
4879 && j
- 1 > first_old
4880 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4881 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4882 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4883 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4885 MATRIX_ROW (desired_matrix
, i
- 1),
4886 MATRIX_ROW (current_matrix
, j
- 1), 1))
4891 /* Nothing to do if all rows are equal. */
4892 if (last_new
== first_new
)
4895 /* Reallocate vectors, tables etc. if necessary. */
4897 if (current_matrix
->nrows
> old_lines_size
)
4899 old_lines_size
= current_matrix
->nrows
;
4900 nbytes
= old_lines_size
* sizeof *old_lines
;
4901 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4904 if (desired_matrix
->nrows
> new_lines_size
)
4906 new_lines_size
= desired_matrix
->nrows
;
4907 nbytes
= new_lines_size
* sizeof *new_lines
;
4908 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4911 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4912 if (3 * n
> row_table_size
)
4914 row_table_size
= next_almost_prime (3 * n
);
4915 nbytes
= row_table_size
* sizeof *row_table
;
4916 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4917 bzero (row_table
, nbytes
);
4920 if (n
> row_entry_pool_size
)
4922 row_entry_pool_size
= n
;
4923 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4924 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4927 if (desired_matrix
->nrows
> runs_size
)
4929 runs_size
= desired_matrix
->nrows
;
4930 nbytes
= runs_size
* sizeof *runs
;
4931 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4932 nbytes
= runs_size
* sizeof *run_pool
;
4933 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4936 nruns
= run_idx
= 0;
4939 /* Add rows from the current and desired matrix to the hash table
4940 row_hash_table to be able to find equal ones quickly. */
4942 for (i
= first_old
; i
< last_old
; ++i
)
4944 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4946 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4947 old_lines
[i
] = entry
;
4951 old_lines
[i
] = NULL
;
4954 for (i
= first_new
; i
< last_new
; ++i
)
4956 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4957 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4959 entry
->new_line_number
= i
;
4960 new_lines
[i
] = entry
;
4963 /* Identify moves based on lines that are unique and equal
4964 in both matrices. */
4965 for (i
= first_old
; i
< last_old
;)
4967 && old_lines
[i
]->old_uses
== 1
4968 && old_lines
[i
]->new_uses
== 1)
4971 int new_line
= old_lines
[i
]->new_line_number
;
4972 struct run
*run
= run_pool
+ run_idx
++;
4975 run
->current_vpos
= i
;
4976 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4977 run
->desired_vpos
= new_line
;
4978 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4980 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4982 /* Extend backward. */
4985 while (j
> first_old
4987 && old_lines
[j
] == new_lines
[k
])
4989 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4990 --run
->current_vpos
;
4991 --run
->desired_vpos
;
4994 run
->desired_y
-= h
;
4995 run
->current_y
-= h
;
4999 /* Extend forward. */
5004 && old_lines
[j
] == new_lines
[k
])
5006 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5012 /* Insert run into list of all runs. Order runs by copied
5013 pixel lines. Note that we record runs that don't have to
5014 be copied because they are already in place. This is done
5015 because we can avoid calling update_window_line in this
5017 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5019 for (k
= nruns
; k
> j
; --k
)
5020 runs
[k
] = runs
[k
- 1];
5029 /* Do the moves. Do it in a way that we don't overwrite something
5030 we want to copy later on. This is not solvable in general
5031 because there is only one display and we don't have a way to
5032 exchange areas on this display. Example:
5034 +-----------+ +-----------+
5036 +-----------+ --> +-----------+
5038 +-----------+ +-----------+
5040 Instead, prefer bigger moves, and invalidate moves that would
5041 copy from where we copied to. */
5043 for (i
= 0; i
< nruns
; ++i
)
5044 if (runs
[i
]->nrows
> 0)
5046 struct run
*r
= runs
[i
];
5048 /* Copy on the display. */
5049 if (r
->current_y
!= r
->desired_y
)
5051 rif
->scroll_run_hook (w
, r
);
5053 /* Invalidate runs that copy from where we copied to. */
5054 for (j
= i
+ 1; j
< nruns
; ++j
)
5056 struct run
*p
= runs
[j
];
5058 if ((p
->current_y
>= r
->desired_y
5059 && p
->current_y
< r
->desired_y
+ r
->height
)
5060 || (p
->current_y
+ p
->height
>= r
->desired_y
5061 && (p
->current_y
+ p
->height
5062 < r
->desired_y
+ r
->height
)))
5067 /* Assign matrix rows. */
5068 for (j
= 0; j
< r
->nrows
; ++j
)
5070 struct glyph_row
*from
, *to
;
5071 int to_overlapped_p
;
5073 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5074 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5075 to_overlapped_p
= to
->overlapped_p
;
5076 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5077 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5078 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5079 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5080 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5081 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5082 from
->redraw_fringe_bitmaps_p
= 1;
5083 assign_row (to
, from
);
5084 to
->enabled_p
= 1, from
->enabled_p
= 0;
5085 to
->overlapped_p
= to_overlapped_p
;
5089 /* Clear the hash table, for the next time. */
5090 for (i
= 0; i
< row_entry_idx
; ++i
)
5091 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5093 /* Value is > 0 to indicate that we scrolled the display. */
5099 /************************************************************************
5101 ************************************************************************/
5103 /* Update the desired frame matrix of frame F.
5105 FORCE_P non-zero means that the update should not be stopped by
5106 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5107 should not be tried.
5109 Value is non-zero if update was stopped due to pending input. */
5112 update_frame_1 (f
, force_p
, inhibit_id_p
)
5117 /* Frame matrices to work on. */
5118 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5119 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5122 int preempt_count
= baud_rate
/ 2400 + 1;
5123 extern int input_pending
;
5125 xassert (current_matrix
&& desired_matrix
);
5127 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5128 calculate_costs (f
);
5130 if (preempt_count
<= 0)
5133 if (redisplay_dont_pause
)
5135 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5141 /* If we cannot insert/delete lines, it's no use trying it. */
5142 if (!FRAME_LINE_INS_DEL_OK (f
))
5145 /* See if any of the desired lines are enabled; don't compute for
5146 i/d line if just want cursor motion. */
5147 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5148 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5151 /* Try doing i/d line, if not yet inhibited. */
5152 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5153 force_p
|= scrolling (f
);
5155 /* Update the individual lines as needed. Do bottom line first. */
5156 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5157 update_frame_line (f
, desired_matrix
->nrows
- 1);
5159 /* Now update the rest of the lines. */
5160 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5162 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5164 if (FRAME_TERMCAP_P (f
))
5166 /* Flush out every so many lines.
5167 Also flush out if likely to have more than 1k buffered
5168 otherwise. I'm told that some telnet connections get
5169 really screwed by more than 1k output at once. */
5170 int outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
)->output
);
5172 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5174 fflush (FRAME_TTY (f
)->output
);
5175 if (preempt_count
== 1)
5177 #ifdef EMACS_OUTQSIZE
5178 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5179 /* Probably not a tty. Ignore the error and reset
5181 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5184 if (baud_rate
<= outq
&& baud_rate
> 0)
5185 sleep (outq
/ baud_rate
);
5190 if ((i
- 1) % preempt_count
== 0)
5191 detect_input_pending_ignore_squeezables ();
5193 update_frame_line (f
, i
);
5197 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5199 /* Now just clean up termcap drivers and set cursor, etc. */
5202 if ((cursor_in_echo_area
5203 /* If we are showing a message instead of the mini-buffer,
5204 show the cursor for the message instead of for the
5205 (now hidden) mini-buffer contents. */
5206 || (EQ (minibuf_window
, selected_window
)
5207 && EQ (minibuf_window
, echo_area_window
)
5208 && !NILP (echo_area_buffer
[0])))
5209 /* These cases apply only to the frame that contains
5210 the active mini-buffer window. */
5211 && FRAME_HAS_MINIBUF_P (f
)
5212 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5214 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5217 if (cursor_in_echo_area
< 0)
5219 /* Negative value of cursor_in_echo_area means put
5220 cursor at beginning of line. */
5226 /* Positive value of cursor_in_echo_area means put
5227 cursor at the end of the prompt. If the mini-buffer
5228 is several lines high, find the last line that has
5230 row
= FRAME_LINES (f
);
5236 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5238 /* Frame rows are filled up with spaces that
5239 must be ignored here. */
5240 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5242 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5243 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5246 && (last
- 1)->charpos
< 0)
5252 while (row
> top
&& col
== 0);
5254 /* Make sure COL is not out of range. */
5255 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5257 /* If we have another row, advance cursor into it. */
5258 if (row
< FRAME_LINES (f
) - 1)
5260 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5263 /* Otherwise move it back in range. */
5265 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5269 cursor_to (f
, row
, col
);
5273 /* We have only one cursor on terminal frames. Use it to
5274 display the cursor of the selected window. */
5275 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5276 if (w
->cursor
.vpos
>= 0
5277 /* The cursor vpos may be temporarily out of bounds
5278 in the following situation: There is one window,
5279 with the cursor in the lower half of it. The window
5280 is split, and a message causes a redisplay before
5281 a new cursor position has been computed. */
5282 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5284 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5285 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5287 if (INTEGERP (w
->left_margin_cols
))
5288 x
+= XFASTINT (w
->left_margin_cols
);
5290 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5291 cursor_to (f
, y
, x
);
5298 clear_desired_matrices (f
);
5303 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5307 struct frame
*frame
;
5309 int unchanged_at_top
, unchanged_at_bottom
;
5312 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5313 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5314 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5315 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5317 int free_at_end_vpos
= FRAME_LINES (frame
);
5318 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5319 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5321 if (!current_matrix
)
5324 /* Compute hash codes of all the lines. Also calculate number of
5325 changed lines, number of unchanged lines at the beginning, and
5326 number of unchanged lines at the end. */
5328 unchanged_at_top
= 0;
5329 unchanged_at_bottom
= FRAME_LINES (frame
);
5330 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5332 /* Give up on this scrolling if some old lines are not enabled. */
5333 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5335 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5336 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5338 /* This line cannot be redrawn, so don't let scrolling mess it. */
5339 new_hash
[i
] = old_hash
[i
];
5340 #define INFINITY 1000000 /* Taken from scroll.c */
5341 draw_cost
[i
] = INFINITY
;
5345 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5346 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5349 if (old_hash
[i
] != new_hash
[i
])
5352 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5354 else if (i
== unchanged_at_top
)
5356 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5359 /* If changed lines are few, don't allow preemption, don't scroll. */
5360 if ((!FRAME_SCROLL_REGION_OK (frame
)
5361 && changed_lines
< baud_rate
/ 2400)
5362 || unchanged_at_bottom
== FRAME_LINES (frame
))
5365 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5366 - unchanged_at_bottom
);
5368 if (FRAME_SCROLL_REGION_OK (frame
))
5369 free_at_end_vpos
-= unchanged_at_bottom
;
5370 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5371 free_at_end_vpos
= -1;
5373 /* If large window, fast terminal and few lines in common between
5374 current frame and desired frame, don't bother with i/d calc. */
5375 if (!FRAME_SCROLL_REGION_OK (frame
)
5376 && window_size
>= 18 && baud_rate
> 2400
5378 10 * scrolling_max_lines_saved (unchanged_at_top
,
5379 FRAME_LINES (frame
) - unchanged_at_bottom
,
5380 old_hash
, new_hash
, draw_cost
)))
5383 if (window_size
< 2)
5386 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5387 draw_cost
+ unchanged_at_top
- 1,
5388 old_draw_cost
+ unchanged_at_top
- 1,
5389 old_hash
+ unchanged_at_top
- 1,
5390 new_hash
+ unchanged_at_top
- 1,
5391 free_at_end_vpos
- unchanged_at_top
);
5397 /* Count the number of blanks at the start of the vector of glyphs R
5398 which is LEN glyphs long. */
5401 count_blanks (r
, len
)
5407 for (i
= 0; i
< len
; ++i
)
5408 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5415 /* Count the number of glyphs in common at the start of the glyph
5416 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5417 of STR2. Value is the number of equal glyphs equal at the start. */
5420 count_match (str1
, end1
, str2
, end2
)
5421 struct glyph
*str1
, *end1
, *str2
, *end2
;
5423 struct glyph
*p1
= str1
;
5424 struct glyph
*p2
= str2
;
5428 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5435 /* Char insertion/deletion cost vector, from term.c */
5437 extern int *char_ins_del_vector
;
5438 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5441 /* Perform a frame-based update on line VPOS in frame FRAME. */
5444 update_frame_line (f
, vpos
)
5448 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5450 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5451 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5452 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5453 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5454 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5455 int must_write_whole_line_p
;
5456 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5457 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5458 != FACE_TTY_DEFAULT_BG_COLOR
);
5460 if (colored_spaces_p
)
5463 /* Current row not enabled means it has unknown contents. We must
5464 write the whole desired line in that case. */
5465 must_write_whole_line_p
= !current_row
->enabled_p
;
5466 if (must_write_whole_line_p
)
5473 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5474 olen
= current_row
->used
[TEXT_AREA
];
5476 /* Ignore trailing spaces, if we can. */
5477 if (!write_spaces_p
)
5478 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5482 current_row
->enabled_p
= 1;
5483 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5485 /* If desired line is empty, just clear the line. */
5486 if (!desired_row
->enabled_p
)
5492 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5493 nlen
= desired_row
->used
[TEXT_AREA
];
5494 nend
= nbody
+ nlen
;
5496 /* If display line has unknown contents, write the whole line. */
5497 if (must_write_whole_line_p
)
5499 /* Ignore spaces at the end, if we can. */
5500 if (!write_spaces_p
)
5501 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5504 /* Write the contents of the desired line. */
5507 cursor_to (f
, vpos
, 0);
5508 write_glyphs (f
, nbody
, nlen
);
5511 /* Don't call clear_end_of_line if we already wrote the whole
5512 line. The cursor will not be at the right margin in that
5513 case but in the line below. */
5514 if (nlen
< FRAME_TOTAL_COLS (f
))
5516 cursor_to (f
, vpos
, nlen
);
5517 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5520 /* Make sure we are in the right row, otherwise cursor movement
5521 with cmgoto might use `ch' in the wrong row. */
5522 cursor_to (f
, vpos
, 0);
5524 make_current (desired_matrix
, current_matrix
, vpos
);
5528 /* Pretend trailing spaces are not there at all,
5529 unless for one reason or another we must write all spaces. */
5530 if (!write_spaces_p
)
5531 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5534 /* If there's no i/d char, quickly do the best we can without it. */
5535 if (!FRAME_CHAR_INS_DEL_OK (f
))
5539 /* Find the first glyph in desired row that doesn't agree with
5540 a glyph in the current row, and write the rest from there on. */
5541 for (i
= 0; i
< nlen
; i
++)
5543 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5545 /* Find the end of the run of different glyphs. */
5549 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5550 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5553 /* Output this run of non-matching chars. */
5554 cursor_to (f
, vpos
, i
);
5555 write_glyphs (f
, nbody
+ i
, j
- i
);
5558 /* Now find the next non-match. */
5562 /* Clear the rest of the line, or the non-clear part of it. */
5565 cursor_to (f
, vpos
, nlen
);
5566 clear_end_of_line (f
, olen
);
5569 /* Make current row = desired row. */
5570 make_current (desired_matrix
, current_matrix
, vpos
);
5574 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5575 characters in a row. */
5579 /* If current line is blank, skip over initial spaces, if
5580 possible, and write the rest. */
5584 nsp
= count_blanks (nbody
, nlen
);
5588 cursor_to (f
, vpos
, nsp
);
5589 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5592 /* Exchange contents between current_frame and new_frame. */
5593 make_current (desired_matrix
, current_matrix
, vpos
);
5597 /* Compute number of leading blanks in old and new contents. */
5598 osp
= count_blanks (obody
, olen
);
5599 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5601 /* Compute number of matching chars starting with first non-blank. */
5602 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5603 nbody
+ nsp
, nbody
+ nlen
);
5605 /* Spaces in new match implicit space past the end of old. */
5606 /* A bug causing this to be a no-op was fixed in 18.29. */
5607 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5610 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5614 /* Avoid doing insert/delete char
5615 just cause number of leading spaces differs
5616 when the following text does not match. */
5617 if (begmatch
== 0 && osp
!= nsp
)
5618 osp
= nsp
= min (osp
, nsp
);
5620 /* Find matching characters at end of line */
5623 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5625 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5630 endmatch
= obody
+ olen
- op1
;
5632 /* tem gets the distance to insert or delete.
5633 endmatch is how many characters we save by doing so.
5636 tem
= (nlen
- nsp
) - (olen
- osp
);
5638 && (!FRAME_CHAR_INS_DEL_OK (f
)
5639 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5642 /* nsp - osp is the distance to insert or delete.
5643 If that is nonzero, begmatch is known to be nonzero also.
5644 begmatch + endmatch is how much we save by doing the ins/del.
5648 && (!FRAME_CHAR_INS_DEL_OK (f
)
5649 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5653 osp
= nsp
= min (osp
, nsp
);
5656 /* Now go through the line, inserting, writing and
5657 deleting as appropriate. */
5661 cursor_to (f
, vpos
, nsp
);
5662 delete_glyphs (f
, osp
- nsp
);
5666 /* If going to delete chars later in line
5667 and insert earlier in the line,
5668 must delete first to avoid losing data in the insert */
5669 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5671 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5672 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5673 olen
= nlen
- (nsp
- osp
);
5675 cursor_to (f
, vpos
, osp
);
5676 insert_glyphs (f
, 0, nsp
- osp
);
5680 tem
= nsp
+ begmatch
+ endmatch
;
5681 if (nlen
!= tem
|| olen
!= tem
)
5683 if (!endmatch
|| nlen
== olen
)
5685 /* If new text being written reaches right margin, there is
5686 no need to do clear-to-eol at the end of this function
5687 (and it would not be safe, since cursor is not going to
5688 be "at the margin" after the text is done). */
5689 if (nlen
== FRAME_TOTAL_COLS (f
))
5692 /* Function write_glyphs is prepared to do nothing
5693 if passed a length <= 0. Check it here to avoid
5694 unnecessary cursor movement. */
5697 cursor_to (f
, vpos
, nsp
+ begmatch
);
5698 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5701 else if (nlen
> olen
)
5703 /* Here, we used to have the following simple code:
5704 ----------------------------------------
5705 write_glyphs (nbody + nsp + begmatch, olen - tem);
5706 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5707 ----------------------------------------
5708 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5709 is a padding glyph. */
5710 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5713 cursor_to (f
, vpos
, nsp
+ begmatch
);
5715 /* Calculate columns we can actually overwrite. */
5716 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5718 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5720 /* If we left columns to be overwritten, we must delete them. */
5721 del
= olen
- tem
- out
;
5723 delete_glyphs (f
, del
);
5725 /* At last, we insert columns not yet written out. */
5726 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5729 else if (olen
> nlen
)
5731 cursor_to (f
, vpos
, nsp
+ begmatch
);
5732 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5733 delete_glyphs (f
, olen
- nlen
);
5739 /* If any unerased characters remain after the new line, erase them. */
5742 cursor_to (f
, vpos
, nlen
);
5743 clear_end_of_line (f
, olen
);
5746 /* Exchange contents between current_frame and new_frame. */
5747 make_current (desired_matrix
, current_matrix
, vpos
);
5752 /***********************************************************************
5753 X/Y Position -> Buffer Position
5754 ***********************************************************************/
5756 /* Determine what's under window-relative pixel position (*X, *Y).
5757 Return the object (string or buffer) that's there.
5758 Return in *POS the position in that object.
5759 Adjust *X and *Y to character positions. */
5762 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5765 struct display_pos
*pos
;
5766 Lisp_Object
*object
;
5768 int *width
, *height
;
5771 struct buffer
*old_current_buffer
= current_buffer
;
5772 struct text_pos startp
;
5774 struct glyph_row
*row
;
5775 #ifdef HAVE_WINDOW_SYSTEM
5776 struct image
*img
= 0;
5780 current_buffer
= XBUFFER (w
->buffer
);
5781 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5782 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5783 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5784 start_display (&it
, w
, startp
);
5786 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5787 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5788 MOVE_TO_X
| MOVE_TO_Y
);
5790 current_buffer
= old_current_buffer
;
5792 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5793 *dy
= *y
- it
.current_y
;
5796 if (STRINGP (it
.string
))
5800 #ifdef HAVE_WINDOW_SYSTEM
5801 if (it
.what
== IT_IMAGE
)
5803 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5804 && !NILP (img
->spec
))
5805 *object
= img
->spec
;
5809 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5812 if (it
.hpos
< row
->used
[TEXT_AREA
])
5814 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5815 #ifdef HAVE_WINDOW_SYSTEM
5818 *dy
-= row
->ascent
- glyph
->ascent
;
5819 *dx
+= glyph
->slice
.x
;
5820 *dy
+= glyph
->slice
.y
;
5821 /* Image slices positions are still relative to the entire image */
5822 *width
= img
->width
;
5823 *height
= img
->height
;
5828 *width
= glyph
->pixel_width
;
5829 *height
= glyph
->ascent
+ glyph
->descent
;
5835 *height
= row
->height
;
5840 *width
= *height
= 0;
5843 /* Add extra (default width) columns if clicked after EOL. */
5844 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5846 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5855 /* Value is the string under window-relative coordinates X/Y in the
5856 mode line or header line (PART says which) of window W, or nil if none.
5857 *CHARPOS is set to the position in the string returned. */
5860 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5862 enum window_part part
;
5865 Lisp_Object
*object
;
5867 int *width
, *height
;
5869 struct glyph_row
*row
;
5870 struct glyph
*glyph
, *end
;
5872 Lisp_Object string
= Qnil
;
5874 if (part
== ON_MODE_LINE
)
5875 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5877 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5879 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5881 if (row
->mode_line_p
&& row
->enabled_p
)
5883 /* Find the glyph under X. If we find one with a string object,
5884 it's the one we were looking for. */
5885 glyph
= row
->glyphs
[TEXT_AREA
];
5886 end
= glyph
+ row
->used
[TEXT_AREA
];
5887 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5888 x0
-= glyph
->pixel_width
;
5889 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5892 string
= glyph
->object
;
5893 *charpos
= glyph
->charpos
;
5894 *width
= glyph
->pixel_width
;
5895 *height
= glyph
->ascent
+ glyph
->descent
;
5896 #ifdef HAVE_WINDOW_SYSTEM
5897 if (glyph
->type
== IMAGE_GLYPH
)
5900 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5902 *object
= img
->spec
;
5903 y0
-= row
->ascent
- glyph
->ascent
;
5909 /* Add extra (default width) columns if clicked after EOL. */
5910 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5912 *height
= row
->height
;
5919 *width
= *height
= 0;
5929 /* Value is the string under window-relative coordinates X/Y in either
5930 marginal area, or nil if none. *CHARPOS is set to the position in
5931 the string returned. */
5934 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5936 enum window_part part
;
5939 Lisp_Object
*object
;
5941 int *width
, *height
;
5943 struct glyph_row
*row
= w
->current_matrix
->rows
;
5944 struct glyph
*glyph
, *end
;
5945 int x0
, y0
, i
, wy
= *y
;
5947 Lisp_Object string
= Qnil
;
5949 if (part
== ON_LEFT_MARGIN
)
5950 area
= LEFT_MARGIN_AREA
;
5951 else if (part
== ON_RIGHT_MARGIN
)
5952 area
= RIGHT_MARGIN_AREA
;
5956 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5957 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5960 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5964 /* Find the glyph under X. If we find one with a string object,
5965 it's the one we were looking for. */
5966 if (area
== RIGHT_MARGIN_AREA
)
5967 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5968 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5969 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5970 + window_box_width (w
, LEFT_MARGIN_AREA
)
5971 + window_box_width (w
, TEXT_AREA
));
5973 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5974 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5977 glyph
= row
->glyphs
[area
];
5978 end
= glyph
+ row
->used
[area
];
5979 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5980 x0
-= glyph
->pixel_width
;
5981 *x
= glyph
- row
->glyphs
[area
];
5984 string
= glyph
->object
;
5985 *charpos
= glyph
->charpos
;
5986 *width
= glyph
->pixel_width
;
5987 *height
= glyph
->ascent
+ glyph
->descent
;
5988 #ifdef HAVE_WINDOW_SYSTEM
5989 if (glyph
->type
== IMAGE_GLYPH
)
5992 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5994 *object
= img
->spec
;
5995 y0
-= row
->ascent
- glyph
->ascent
;
5996 x0
+= glyph
->slice
.x
;
5997 y0
+= glyph
->slice
.y
;
6003 /* Add extra (default width) columns if clicked after EOL. */
6004 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6006 *height
= row
->height
;
6013 *width
= *height
= 0;
6023 /***********************************************************************
6024 Changing Frame Sizes
6025 ***********************************************************************/
6030 window_change_signal (signalnum
) /* If we don't have an argument, */
6031 int signalnum
; /* some compilers complain in signal calls. */
6037 int old_errno
= errno
;
6039 struct tty_display_info
*tty
;
6041 signal (SIGWINCH
, window_change_signal
);
6042 SIGNAL_THREAD_CHECK (signalnum
);
6044 /* The frame size change obviously applies to a single
6045 termcap-controlled terminal, but we can't decide which.
6046 Therefore, we resize the frames corresponding to each tty.
6048 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6050 if (! tty
->term_initted
)
6053 get_tty_size (fileno (tty
->input
), &width
, &height
);
6056 Lisp_Object tail
, frame
;
6058 FOR_EACH_FRAME (tail
, frame
)
6059 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6060 /* Record the new sizes, but don't reallocate the data
6061 structures now. Let that be done later outside of the
6063 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6069 #endif /* SIGWINCH */
6072 /* Do any change in frame size that was requested by a signal. SAFE
6073 non-zero means this function is called from a place where it is
6074 safe to change frame sizes while a redisplay is in progress. */
6077 do_pending_window_change (safe
)
6080 /* If window_change_signal should have run before, run it now. */
6081 if (redisplaying_p
&& !safe
)
6084 while (delayed_size_change
)
6086 Lisp_Object tail
, frame
;
6088 delayed_size_change
= 0;
6090 FOR_EACH_FRAME (tail
, frame
)
6092 struct frame
*f
= XFRAME (frame
);
6094 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6095 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6102 /* Change the frame height and/or width. Values may be given as zero to
6103 indicate no change is to take place.
6105 If DELAY is non-zero, then assume we're being called from a signal
6106 handler, and queue the change for later - perhaps the next
6107 redisplay. Since this tries to resize windows, we can't call it
6108 from a signal handler.
6110 SAFE non-zero means this function is called from a place where it's
6111 safe to change frame sizes while a redisplay is in progress. */
6114 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6115 register struct frame
*f
;
6116 int newheight
, newwidth
, pretend
, delay
, safe
;
6118 Lisp_Object tail
, frame
;
6120 if (FRAME_MSDOS_P (f
))
6122 /* On MS-DOS, all frames use the same screen, so a change in
6123 size affects all frames. Termcap now supports multiple
6125 FOR_EACH_FRAME (tail
, frame
)
6126 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6127 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6128 pretend
, delay
, safe
);
6131 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6135 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6136 register struct frame
*f
;
6137 int newheight
, newwidth
, pretend
, delay
, safe
;
6139 int new_frame_total_cols
;
6140 int count
= SPECPDL_INDEX ();
6142 /* If we can't deal with the change now, queue it for later. */
6143 if (delay
|| (redisplaying_p
&& !safe
))
6145 f
->new_text_lines
= newheight
;
6146 f
->new_text_cols
= newwidth
;
6147 delayed_size_change
= 1;
6151 /* This size-change overrides any pending one for this frame. */
6152 f
->new_text_lines
= 0;
6153 f
->new_text_cols
= 0;
6155 /* If an argument is zero, set it to the current value. */
6157 newheight
= FRAME_LINES (f
);
6159 newwidth
= FRAME_COLS (f
);
6161 /* Compute width of windows in F.
6162 This is the width of the frame without vertical scroll bars. */
6163 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6165 /* Round up to the smallest acceptable size. */
6166 check_frame_size (f
, &newheight
, &newwidth
);
6168 /* If we're not changing the frame size, quit now. */
6169 if (newheight
== FRAME_LINES (f
)
6170 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6176 /* We only can set screen dimensions to certain values supported
6177 by our video hardware. Try to find the smallest size greater
6178 or equal to the requested dimensions. */
6179 dos_set_window_size (&newheight
, &newwidth
);
6182 if (newheight
!= FRAME_LINES (f
))
6184 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6186 /* Frame has both root and mini-buffer. */
6187 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6188 FRAME_TOP_MARGIN (f
));
6189 set_window_height (FRAME_ROOT_WINDOW (f
),
6192 - FRAME_TOP_MARGIN (f
)),
6194 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6196 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6199 /* Frame has just one top-level window. */
6200 set_window_height (FRAME_ROOT_WINDOW (f
),
6201 newheight
- FRAME_TOP_MARGIN (f
), 0);
6203 if (FRAME_TERMCAP_P (f
) && !pretend
)
6204 FrameRows (FRAME_TTY (f
)) = newheight
;
6207 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6209 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6210 if (FRAME_HAS_MINIBUF_P (f
))
6211 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6213 if (FRAME_TERMCAP_P (f
) && !pretend
)
6214 FrameCols (FRAME_TTY (f
)) = newwidth
;
6216 if (WINDOWP (f
->tool_bar_window
))
6217 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6220 FRAME_LINES (f
) = newheight
;
6221 SET_FRAME_COLS (f
, newwidth
);
6224 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6225 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6227 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6229 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6230 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6231 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6232 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6236 calculate_costs (f
);
6237 SET_FRAME_GARBAGED (f
);
6242 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6244 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6245 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6246 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6248 unbind_to (count
, Qnil
);
6253 /***********************************************************************
6254 Terminal Related Lisp Functions
6255 ***********************************************************************/
6257 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6258 1, 1, "FOpen termscript file: ",
6259 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6260 FILE = nil means just close any termscript file currently open. */)
6264 struct tty_display_info
*tty
;
6266 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6267 error ("Current frame is not on a tty device");
6271 if (tty
->termscript
!= 0)
6272 fclose (tty
->termscript
);
6273 tty
->termscript
= 0;
6277 file
= Fexpand_file_name (file
, Qnil
);
6278 tty
->termscript
= fopen (SDATA (file
), "w");
6279 if (tty
->termscript
== 0)
6280 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6286 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6287 Ssend_string_to_terminal
, 1, 1, 0,
6288 doc
: /* Send STRING to the terminal without alteration.
6289 Control characters in STRING will have terminal-dependent effects. */)
6293 struct tty_display_info
*tty
;
6295 /* ??? Perhaps we should do something special for multibyte strings here. */
6296 CHECK_STRING (string
);
6298 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6299 error ("Current frame is not on a tty device");
6303 if (tty
->termscript
)
6305 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6306 fflush (tty
->termscript
);
6308 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->output
);
6309 fflush (tty
->output
);
6314 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6315 doc
: /* Beep, or flash the screen.
6316 Also, unless an argument is given,
6317 terminate any keyboard macro currently executing. */)
6326 ring_bell (XFRAME (selected_frame
));
6339 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6340 error ("Keyboard macro terminated by a command ringing the bell");
6342 ring_bell (XFRAME (selected_frame
));
6347 /***********************************************************************
6349 ***********************************************************************/
6351 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6352 doc
: /* Pause, without updating display, for SECONDS seconds.
6353 SECONDS may be a floating-point value, meaning that you can wait for a
6354 fraction of a second. Optional second arg MILLISECONDS specifies an
6355 additional wait period, in milliseconds; this may be useful if your
6356 Emacs was built without floating point support.
6357 \(Not all operating systems support waiting for a fraction of a second.) */)
6358 (seconds
, milliseconds
)
6359 Lisp_Object seconds
, milliseconds
;
6363 if (NILP (milliseconds
))
6364 XSETINT (milliseconds
, 0);
6366 CHECK_NUMBER (milliseconds
);
6367 usec
= XINT (milliseconds
) * 1000;
6370 double duration
= extract_float (seconds
);
6371 sec
= (int) duration
;
6372 usec
+= (duration
- sec
) * 1000000;
6375 #ifndef EMACS_HAS_USECS
6376 if (sec
== 0 && usec
!= 0)
6377 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6380 /* Assure that 0 <= usec < 1000000. */
6383 /* We can't rely on the rounding being correct if usec is negative. */
6384 if (-1000000 < usec
)
6385 sec
--, usec
+= 1000000;
6387 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6390 sec
+= usec
/ 1000000, usec
%= 1000000;
6392 if (sec
< 0 || (sec
== 0 && usec
== 0))
6395 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6401 /* This is just like wait_reading_process_output, except that
6402 it does the redisplay.
6404 It's also much like Fsit_for, except that it can be used for
6405 waiting for input as well. */
6408 sit_for (sec
, usec
, reading
, display
, initial_display
)
6409 int sec
, usec
, reading
, display
, initial_display
;
6411 swallow_events (display
);
6413 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6416 if (initial_display
)
6417 redisplay_preserve_echo_area (2);
6419 if (sec
== 0 && usec
== 0)
6426 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6429 return detect_input_pending () ? Qnil
: Qt
;
6433 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6434 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6435 SECONDS may be a floating-point value, meaning that you can wait for a
6436 fraction of a second.
6437 \(Not all operating systems support waiting for a fraction of a second.)
6438 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6439 Redisplay is preempted as always if input arrives, and does not happen
6440 if input is available before it starts.
6441 Value is t if waited the full time with no input arriving.
6443 An obsolete but still supported form is
6444 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6445 Where the optional arg MILLISECONDS specifies an additional wait period,
6446 in milliseconds; this was useful when Emacs was built without
6447 floating point support.
6448 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6450 /* The `old-nodisp' stuff is there so that the arglist has the correct
6451 length. Otherwise, `defdvice' will redefine it with fewer args. */
6452 (seconds
, milliseconds
, nodisp
)
6453 Lisp_Object seconds
, milliseconds
, nodisp
;
6457 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6459 nodisp
= milliseconds
;
6460 milliseconds
= Qnil
;
6463 if (NILP (milliseconds
))
6464 XSETINT (milliseconds
, 0);
6466 CHECK_NUMBER (milliseconds
);
6467 usec
= XINT (milliseconds
) * 1000;
6470 double duration
= extract_float (seconds
);
6471 sec
= (int) duration
;
6472 usec
+= (duration
- sec
) * 1000000;
6475 #ifndef EMACS_HAS_USECS
6476 if (usec
!= 0 && sec
== 0)
6477 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6480 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6485 /***********************************************************************
6486 Other Lisp Functions
6487 ***********************************************************************/
6489 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6490 session's frames, frame names, buffers, buffer-read-only flags, and
6491 buffer-modified-flags, and a trailing sentinel (so we don't need to
6492 add length checks). */
6494 static Lisp_Object frame_and_buffer_state
;
6497 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6498 Sframe_or_buffer_changed_p
, 0, 0, 0,
6499 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6500 The state variable is an internal vector containing all frames and buffers,
6501 aside from buffers whose names start with space,
6502 along with the buffers' read-only and modified flags, which allows a fast
6503 check to see whether the menu bars might need to be recomputed.
6504 If this function returns non-nil, it updates the internal vector to reflect
6505 the current state. */)
6508 Lisp_Object tail
, frame
, buf
;
6512 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6513 FOR_EACH_FRAME (tail
, frame
)
6515 if (!EQ (*vecp
++, frame
))
6517 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6520 /* Check that the buffer info matches.
6521 No need to test for the end of the vector
6522 because the last element of the vector is lambda
6523 and that will always cause a mismatch. */
6524 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6526 buf
= XCDR (XCAR (tail
));
6527 /* Ignore buffers that aren't included in buffer lists. */
6528 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6530 if (!EQ (*vecp
++, buf
))
6532 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6534 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6537 /* Detect deletion of a buffer at the end of the list. */
6538 if (EQ (*vecp
, Qlambda
))
6541 /* Start with 1 so there is room for at least one lambda at the end. */
6543 FOR_EACH_FRAME (tail
, frame
)
6545 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6547 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6548 if (n
> XVECTOR (frame_and_buffer_state
)->size
6549 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6550 /* Add 20 extra so we grow it less often. */
6551 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6552 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6553 FOR_EACH_FRAME (tail
, frame
)
6556 *vecp
++ = XFRAME (frame
)->name
;
6558 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6560 buf
= XCDR (XCAR (tail
));
6561 /* Ignore buffers that aren't included in buffer lists. */
6562 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6565 *vecp
++ = XBUFFER (buf
)->read_only
;
6566 *vecp
++ = Fbuffer_modified_p (buf
);
6568 /* Fill up the vector with lambdas (always at least one). */
6570 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6571 < XVECTOR (frame_and_buffer_state
)->size
)
6573 /* Make sure we didn't overflow the vector. */
6574 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6575 > XVECTOR (frame_and_buffer_state
)->size
)
6582 /***********************************************************************
6584 ***********************************************************************/
6586 /* Initialization done when Emacs fork is started, before doing stty.
6587 Determine terminal type and set terminal_driver. Then invoke its
6588 decoding routine to set up variables in the terminal package. */
6593 char *terminal_type
;
6595 #ifdef HAVE_X_WINDOWS
6596 extern int display_arg
;
6599 /* Construct the space glyph. */
6600 space_glyph
.type
= CHAR_GLYPH
;
6601 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6602 space_glyph
.charpos
= -1;
6605 cursor_in_echo_area
= 0;
6606 terminal_type
= (char *) 0;
6608 /* Now is the time to initialize this; it's used by init_sys_modes
6610 Vinitial_window_system
= Qnil
;
6612 /* SIGWINCH needs to be handled no matter what display we start
6613 with. Otherwise newly opened tty frames will not resize
6618 #endif /* CANNOT_DUMP */
6619 signal (SIGWINCH
, window_change_signal
);
6620 #endif /* SIGWINCH */
6622 /* If the user wants to use a window system, we shouldn't bother
6623 initializing the terminal. This is especially important when the
6624 terminal is so dumb that emacs gives up before and doesn't bother
6625 using the window system.
6627 If the DISPLAY environment variable is set and nonempty,
6628 try to use X, and die with an error message if that doesn't work. */
6630 #ifdef HAVE_X_WINDOWS
6635 display
= getenv ("DECW$DISPLAY");
6637 display
= getenv ("DISPLAY");
6640 display_arg
= (display
!= 0 && *display
!= 0);
6643 if (!inhibit_window_system
&& display_arg
6649 Vinitial_window_system
= intern ("x");
6651 Vwindow_system_version
= make_number (11);
6653 Vwindow_system_version
= make_number (10);
6655 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6656 /* In some versions of ncurses,
6657 tputs crashes if we have not called tgetent.
6659 { char b
[2044]; tgetent (b
, "xterm");}
6661 adjust_frame_glyphs_initially ();
6664 #endif /* HAVE_X_WINDOWS */
6667 if (!inhibit_window_system
)
6669 Vinitial_window_system
= intern ("w32");
6670 Vwindow_system_version
= make_number (1);
6671 adjust_frame_glyphs_initially ();
6674 #endif /* HAVE_NTGUI */
6677 if (!inhibit_window_system
)
6679 Vinitial_window_system
= intern ("mac");
6680 Vwindow_system_version
= make_number (1);
6681 adjust_frame_glyphs_initially ();
6686 /* If no window system has been specified, try to use the terminal. */
6689 fatal ("standard input is not a tty");
6693 /* Look at the TERM variable. */
6694 terminal_type
= (char *) getenv ("TERM");
6698 fprintf (stderr
, "Please specify your terminal type.\n\
6699 For types defined in VMS, use set term /device=TYPE.\n\
6700 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6701 \(The quotation marks are necessary since terminal types are lower case.)\n");
6703 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6709 /* VMS DCL tends to up-case things, so down-case term type.
6710 Hardly any uppercase letters in terminal types; should be none. */
6712 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6715 strcpy (new, terminal_type
);
6717 for (p
= new; *p
; p
++)
6721 terminal_type
= new;
6727 struct frame
*f
= XFRAME (selected_frame
);
6729 /* Open a display on the controlling tty. */
6730 d
= term_init (0, terminal_type
, 1); /* Errors are fatal. */
6732 /* Convert the initial frame to use the new display. */
6733 if (f
->output_method
!= output_initial
)
6735 f
->output_method
= d
->type
;
6738 d
->reference_count
++;
6739 d
->display_info
.tty
->top_frame
= selected_frame
;
6740 change_frame_size (XFRAME (selected_frame
), FrameRows (d
->display_info
.tty
), FrameCols (d
->display_info
.tty
), 0, 0, 1);
6742 /* Delete the initial display. */
6743 if (--initial_display
->reference_count
== 0
6744 && initial_display
->delete_display_hook
)
6745 (*initial_display
->delete_display_hook
) (initial_display
);
6747 /* Update frame parameters to reflect the new type. */
6748 Fmodify_frame_parameters
6749 (selected_frame
, Fcons (Fcons (Qtty_type
,
6750 Fdisplay_tty_type (selected_frame
)), Qnil
));
6754 struct frame
*sf
= SELECTED_FRAME ();
6755 int width
= FRAME_TOTAL_COLS (sf
);
6756 int height
= FRAME_LINES (sf
);
6758 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6760 /* If these sizes are so big they cause overflow, just ignore the
6761 change. It's not clear what better we could do. */
6762 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6763 fatal ("screen size %dx%d too big", width
, height
);
6766 adjust_frame_glyphs_initially ();
6767 calculate_costs (XFRAME (selected_frame
));
6769 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6773 /* The MSDOS terminal turns on its ``window system'' relatively
6774 late into the startup, so we cannot do the frame faces'
6775 initialization just yet. It will be done later by pc-win.el
6776 and internal_terminal_init. */
6777 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6779 && NILP (Vinitial_window_system
))
6781 /* For the initial frame, we don't have any way of knowing what
6782 are the foreground and background colors of the terminal. */
6783 struct frame
*sf
= SELECTED_FRAME();
6785 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6786 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6787 call0 (intern ("tty-set-up-initial-frame-faces"));
6793 /***********************************************************************
6795 ***********************************************************************/
6797 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6798 Sinternal_show_cursor
, 2, 2, 0,
6799 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6800 WINDOW nil means use the selected window. SHOW non-nil means
6801 show a cursor in WINDOW in the next redisplay. SHOW nil means
6802 don't show a cursor. */)
6804 Lisp_Object window
, show
;
6806 /* Don't change cursor state while redisplaying. This could confuse
6808 if (!redisplaying_p
)
6811 window
= selected_window
;
6813 CHECK_WINDOW (window
);
6815 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6822 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6823 Sinternal_show_cursor_p
, 0, 1, 0,
6824 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6825 WINDOW nil or omitted means report on the selected window. */)
6832 window
= selected_window
;
6834 CHECK_WINDOW (window
);
6836 w
= XWINDOW (window
);
6837 return w
->cursor_off_p
? Qnil
: Qt
;
6841 /***********************************************************************
6843 ***********************************************************************/
6848 defsubr (&Sredraw_frame
);
6849 defsubr (&Sredraw_display
);
6850 defsubr (&Sframe_or_buffer_changed_p
);
6851 defsubr (&Sopen_termscript
);
6853 defsubr (&Ssit_for
);
6854 defsubr (&Ssleep_for
);
6855 defsubr (&Ssend_string_to_terminal
);
6856 defsubr (&Sinternal_show_cursor
);
6857 defsubr (&Sinternal_show_cursor_p
);
6860 defsubr (&Sdump_redisplay_history
);
6863 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6864 staticpro (&frame_and_buffer_state
);
6866 Qdisplay_table
= intern ("display-table");
6867 staticpro (&Qdisplay_table
);
6868 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6869 staticpro (&Qredisplay_dont_pause
);
6871 DEFVAR_INT ("baud-rate", &baud_rate
,
6872 doc
: /* *The output baud rate of the terminal.
6873 On most systems, changing this value will affect the amount of padding
6874 and the other strategic decisions made during redisplay. */);
6876 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6877 doc
: /* *Non-nil means invert the entire frame display.
6878 This means everything is in inverse video which otherwise would not be. */);
6880 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6881 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6883 See also `ring-bell-function'. */);
6885 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6886 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6887 A non-nil value is useful if the terminal can automatically preserve
6888 Emacs's frame display when you reenter Emacs.
6889 It is up to you to set this variable if your terminal can do that. */);
6891 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6892 doc
: /* Name of the window system that Emacs uses for the first frame.
6893 The value is a symbol--for instance, `x' for X windows.
6894 The value is nil if Emacs is using a text-only terminal. */);
6896 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6897 doc
: /* The version number of the window system in use.
6898 For X windows, this is 10 or 11. */);
6900 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6901 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6903 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6904 doc
: /* Table defining how to output a glyph code to the frame.
6905 If not nil, this is a vector indexed by glyph code to define the glyph.
6906 Each element can be:
6907 integer: a glyph code which this glyph is an alias for.
6908 string: output this glyph using that string (not impl. in X windows).
6909 nil: this glyph mod 524288 is the code of a character to output,
6910 and this glyph / 524288 is the face number (see `face-id') to use
6911 while outputting it. */);
6912 Vglyph_table
= Qnil
;
6914 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6915 doc
: /* Display table to use for buffers that specify none.
6916 See `buffer-display-table' for more information. */);
6917 Vstandard_display_table
= Qnil
;
6919 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6920 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6921 redisplay_dont_pause
= 0;
6923 /* Initialize `window-system', unless init_display already decided it. */
6928 Vinitial_window_system
= Qnil
;
6929 Vwindow_system_version
= Qnil
;
6933 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6934 (do not change this comment) */