1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Nonzero upon entry to redisplay means do not assume anything about
196 current contents of actual terminal frame; clear and redraw it. */
200 /* Nonzero means last display completed. Zero means it was preempted. */
202 int display_completed
;
204 /* Lisp variable visible-bell; enables use of screen-flash instead of
209 /* Invert the color of the whole frame, at a low level. */
213 /* Line speed of the terminal. */
217 /* Either nil or a symbol naming the window system under which Emacs
220 Lisp_Object Vwindow_system
;
222 /* Version number of X windows: 10, 11 or nil. */
224 Lisp_Object Vwindow_system_version
;
226 /* Vector of glyph definitions. Indexed by glyph number, the contents
227 are a string which is how to output the glyph.
229 If Vglyph_table is nil, a glyph is output by using its low 8 bits
232 This is an obsolete feature that is no longer used. The variable
233 is retained for compatibility. */
235 Lisp_Object Vglyph_table
;
237 /* Display table to use for vectors that don't specify their own. */
239 Lisp_Object Vstandard_display_table
;
241 /* Nonzero means reading single-character input with prompt so put
242 cursor on mini-buffer after the prompt. Positive means at end of
243 text in echo area; negative means at beginning of line. */
245 int cursor_in_echo_area
;
247 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
250 /* The currently selected frame. In a single-frame version, this
251 variable always equals the_only_frame. */
253 Lisp_Object selected_frame
;
255 /* A frame which is not just a mini-buffer, or 0 if there are no such
256 frames. This is usually the most recent such frame that was
257 selected. In a single-frame version, this variable always holds
258 the address of the_only_frame. */
260 struct frame
*last_nonminibuf_frame
;
262 /* Stdio stream being used for copy of all output. */
266 /* Structure for info on cursor positioning. */
270 /* 1 means SIGWINCH happened when not safe. */
272 int delayed_size_change
;
274 /* 1 means glyph initialization has been completed at startup. */
276 static int glyphs_initialized_initially_p
;
278 /* Updated window if != 0. Set by update_window. */
280 struct window
*updated_window
;
282 /* Glyph row updated in update_window_line, and area that is updated. */
284 struct glyph_row
*updated_row
;
287 /* A glyph for a space. */
289 struct glyph space_glyph
;
291 /* Non-zero means update has been performed directly, so that there's
292 no need for redisplay_internal to do much work. Set by
293 direct_output_for_insert. */
295 int redisplay_performed_directly_p
;
297 /* Counts of allocated structures. These counts serve to diagnose
298 memory leaks and double frees. */
300 int glyph_matrix_count
;
301 int glyph_pool_count
;
303 /* If non-null, the frame whose frame matrices are manipulated. If
304 null, window matrices are worked on. */
306 static struct frame
*frame_matrix_frame
;
308 /* Current interface for window-based redisplay. Set from init_xterm.
309 A null value means we are not using window-based redisplay. */
311 struct redisplay_interface
*rif
;
313 /* Non-zero means that fonts have been loaded since the last glyph
314 matrix adjustments. Redisplay must stop, and glyph matrices must
315 be adjusted when this flag becomes non-zero during display. The
316 reason fonts can be loaded so late is that fonts of fontsets are
321 /* Convert vpos and hpos from frame to window and vice versa.
322 This may only be used for terminal frames. */
326 static int window_to_frame_vpos
P_ ((struct window
*, int));
327 static int window_to_frame_hpos
P_ ((struct window
*, int));
328 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
329 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
331 /* One element of the ring buffer containing redisplay history
334 struct redisplay_history
336 char trace
[512 + 100];
339 /* The size of the history buffer. */
341 #define REDISPLAY_HISTORY_SIZE 30
343 /* The redisplay history buffer. */
345 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
347 /* Next free entry in redisplay_history. */
349 static int history_idx
;
351 /* A tick that's incremented each time something is added to the
354 static unsigned history_tick
;
356 static void add_frame_display_history
P_ ((struct frame
*, int));
357 static void add_window_display_history
P_ ((struct window
*, char *, int));
360 /* Add to the redisplay history how window W has been displayed.
361 MSG is a trace containing the information how W's glyph matrix
362 has been constructed. PAUSED_P non-zero means that the update
363 has been interrupted for pending input. */
366 add_window_display_history (w
, msg
, paused_p
)
373 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
375 buf
= redisplay_history
[history_idx
].trace
;
378 sprintf (buf
, "%d: window %p (`%s')%s\n",
381 ((BUFFERP (w
->buffer
)
382 && STRINGP (XBUFFER (w
->buffer
)->name
))
383 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
385 paused_p
? " ***paused***" : "");
390 /* Add to the redisplay history that frame F has been displayed.
391 PAUSED_P non-zero means that the update has been interrupted for
395 add_frame_display_history (f
, paused_p
)
401 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
403 buf
= redisplay_history
[history_idx
].trace
;
406 sprintf (buf
, "%d: update frame %p%s",
408 f
, paused_p
? " ***paused***" : "");
412 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
413 Sdump_redisplay_history
, 0, 0, "",
414 doc
: /* Dump redisplay history to stderr. */)
419 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
422 i
= REDISPLAY_HISTORY_SIZE
- 1;
423 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
430 #else /* GLYPH_DEBUG == 0 */
432 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
433 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
435 #endif /* GLYPH_DEBUG == 0 */
438 /* Like bcopy except never gets confused by overlap. Let this be the
439 first function defined in this file, or change emacs.c where the
440 address of this function is used. */
443 safe_bcopy (from
, to
, size
)
448 if (size
<= 0 || from
== to
)
451 /* If the source and destination don't overlap, then bcopy can
452 handle it. If they do overlap, but the destination is lower in
453 memory than the source, we'll assume bcopy can handle that. */
454 if (to
< from
|| from
+ size
<= to
)
455 bcopy (from
, to
, size
);
457 /* Otherwise, we'll copy from the end. */
460 register const char *endf
= from
+ size
;
461 register char *endt
= to
+ size
;
463 /* If TO - FROM is large, then we should break the copy into
464 nonoverlapping chunks of TO - FROM bytes each. However, if
465 TO - FROM is small, then the bcopy function call overhead
466 makes this not worth it. The crossover point could be about
467 anywhere. Since I don't think the obvious copy loop is too
468 bad, I'm trying to err in its favor. */
473 while (endf
!= from
);
485 bcopy (endf
, endt
, to
- from
);
488 /* If SIZE wasn't a multiple of TO - FROM, there will be a
489 little left over. The amount left over is (endt + (to -
490 from)) - to, which is endt - from. */
491 bcopy (from
, to
, endt
- from
);
498 /***********************************************************************
500 ***********************************************************************/
502 /* Allocate and return a glyph_matrix structure. POOL is the glyph
503 pool from which memory for the matrix should be allocated, or null
504 for window-based redisplay where no glyph pools are used. The
505 member `pool' of the glyph matrix structure returned is set to
506 POOL, the structure is otherwise zeroed. */
508 struct glyph_matrix
*
509 new_glyph_matrix (pool
)
510 struct glyph_pool
*pool
;
512 struct glyph_matrix
*result
;
514 /* Allocate and clear. */
515 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
516 bzero (result
, sizeof *result
);
518 /* Increment number of allocated matrices. This count is used
519 to detect memory leaks. */
520 ++glyph_matrix_count
;
522 /* Set pool and return. */
528 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
530 The global counter glyph_matrix_count is decremented when a matrix
531 is freed. If the count gets negative, more structures were freed
532 than allocated, i.e. one matrix was freed more than once or a bogus
533 pointer was passed to this function.
535 If MATRIX->pool is null, this means that the matrix manages its own
536 glyph memory---this is done for matrices on X frames. Freeing the
537 matrix also frees the glyph memory in this case. */
540 free_glyph_matrix (matrix
)
541 struct glyph_matrix
*matrix
;
547 /* Detect the case that more matrices are freed than were
549 if (--glyph_matrix_count
< 0)
552 /* Free glyph memory if MATRIX owns it. */
553 if (matrix
->pool
== NULL
)
554 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
555 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
557 /* Free row structures and the matrix itself. */
558 xfree (matrix
->rows
);
564 /* Return the number of glyphs to reserve for a marginal area of
565 window W. TOTAL_GLYPHS is the number of glyphs in a complete
566 display line of window W. MARGIN gives the width of the marginal
567 area in canonical character units. MARGIN should be an integer
571 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
578 if (NUMBERP (margin
))
580 int width
= XFASTINT (w
->total_cols
);
581 double d
= max (0, XFLOATINT (margin
));
582 d
= min (width
/ 2 - 1, d
);
583 n
= (int) ((double) total_glyphs
/ width
* d
);
592 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
595 W is null if the function is called for a frame glyph matrix.
596 Otherwise it is the window MATRIX is a member of. X and Y are the
597 indices of the first column and row of MATRIX within the frame
598 matrix, if such a matrix exists. They are zero for purely
599 window-based redisplay. DIM is the needed size of the matrix.
601 In window-based redisplay, where no frame matrices exist, glyph
602 matrices manage their own glyph storage. Otherwise, they allocate
603 storage from a common frame glyph pool which can be found in
606 The reason for this memory management strategy is to avoid complete
607 frame redraws if possible. When we allocate from a common pool, a
608 change of the location or size of a sub-matrix within the pool
609 requires a complete redisplay of the frame because we cannot easily
610 make sure that the current matrices of all windows still agree with
611 what is displayed on the screen. While this is usually fast, it
612 leads to screen flickering. */
615 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
617 struct glyph_matrix
*matrix
;
623 int marginal_areas_changed_p
= 0;
624 int header_line_changed_p
= 0;
625 int header_line_p
= 0;
626 int left
= -1, right
= -1;
627 int window_width
= -1, window_height
;
629 /* See if W had a header line that has disappeared now, or vice versa.
633 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
635 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
636 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
638 matrix
->header_line_p
= header_line_p
;
640 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
641 Do nothing if MATRIX' size, position, vscroll, and marginal areas
642 haven't changed. This optimization is important because preserving
643 the matrix means preventing redisplay. */
644 if (matrix
->pool
== NULL
)
646 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
647 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
648 xassert (left
>= 0 && right
>= 0);
649 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
650 || right
!= matrix
->right_margin_glyphs
);
652 if (!marginal_areas_changed_p
654 && !header_line_changed_p
655 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
656 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
657 && matrix
->window_height
== window_height
658 && matrix
->window_vscroll
== w
->vscroll
659 && matrix
->window_width
== window_width
)
663 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
664 if (matrix
->rows_allocated
< dim
.height
)
666 int size
= dim
.height
* sizeof (struct glyph_row
);
667 new_rows
= dim
.height
- matrix
->rows_allocated
;
668 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
669 bzero (matrix
->rows
+ matrix
->rows_allocated
,
670 new_rows
* sizeof *matrix
->rows
);
671 matrix
->rows_allocated
= dim
.height
;
676 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
677 on a frame not using window-based redisplay. Set up pointers for
678 each row into the glyph pool. */
681 xassert (matrix
->pool
->glyphs
);
685 left
= margin_glyphs_to_reserve (w
, dim
.width
,
686 w
->left_margin_cols
);
687 right
= margin_glyphs_to_reserve (w
, dim
.width
,
688 w
->right_margin_cols
);
693 for (i
= 0; i
< dim
.height
; ++i
)
695 struct glyph_row
*row
= &matrix
->rows
[i
];
697 row
->glyphs
[LEFT_MARGIN_AREA
]
698 = (matrix
->pool
->glyphs
699 + (y
+ i
) * matrix
->pool
->ncolumns
703 || row
== matrix
->rows
+ dim
.height
- 1
704 || (row
== matrix
->rows
&& matrix
->header_line_p
))
706 row
->glyphs
[TEXT_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
];
708 row
->glyphs
[RIGHT_MARGIN_AREA
]
709 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
710 row
->glyphs
[LAST_AREA
]
711 = row
->glyphs
[RIGHT_MARGIN_AREA
];
715 row
->glyphs
[TEXT_AREA
]
716 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
717 row
->glyphs
[RIGHT_MARGIN_AREA
]
718 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
719 row
->glyphs
[LAST_AREA
]
720 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
724 matrix
->left_margin_glyphs
= left
;
725 matrix
->right_margin_glyphs
= right
;
729 /* If MATRIX->pool is null, MATRIX is responsible for managing
730 its own memory. It is a window matrix for window-based redisplay.
731 Allocate glyph memory from the heap. */
732 if (dim
.width
> matrix
->matrix_w
734 || header_line_changed_p
735 || marginal_areas_changed_p
)
737 struct glyph_row
*row
= matrix
->rows
;
738 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
742 row
->glyphs
[LEFT_MARGIN_AREA
]
743 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
745 * sizeof (struct glyph
)));
747 /* The mode line never has marginal areas. */
748 if (row
== matrix
->rows
+ dim
.height
- 1
749 || (row
== matrix
->rows
&& matrix
->header_line_p
))
751 row
->glyphs
[TEXT_AREA
]
752 = row
->glyphs
[LEFT_MARGIN_AREA
];
753 row
->glyphs
[RIGHT_MARGIN_AREA
]
754 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
755 row
->glyphs
[LAST_AREA
]
756 = row
->glyphs
[RIGHT_MARGIN_AREA
];
760 row
->glyphs
[TEXT_AREA
]
761 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
762 row
->glyphs
[RIGHT_MARGIN_AREA
]
763 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
764 row
->glyphs
[LAST_AREA
]
765 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
771 xassert (left
>= 0 && right
>= 0);
772 matrix
->left_margin_glyphs
= left
;
773 matrix
->right_margin_glyphs
= right
;
776 /* Number of rows to be used by MATRIX. */
777 matrix
->nrows
= dim
.height
;
778 xassert (matrix
->nrows
>= 0);
782 if (matrix
== w
->current_matrix
)
784 /* Mark rows in a current matrix of a window as not having
785 valid contents. It's important to not do this for
786 desired matrices. When Emacs starts, it may already be
787 building desired matrices when this function runs. */
788 if (window_width
< 0)
789 window_width
= window_box_width (w
, -1);
791 /* Optimize the case that only the height has changed (C-x 2,
792 upper window). Invalidate all rows that are no longer part
794 if (!marginal_areas_changed_p
795 && !header_line_changed_p
797 && dim
.width
== matrix
->matrix_w
798 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
799 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
800 && matrix
->window_width
== window_width
)
802 /* Find the last row in the window. */
803 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
804 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
810 /* Window end is invalid, if inside of the rows that
811 are invalidated below. */
812 if (INTEGERP (w
->window_end_vpos
)
813 && XFASTINT (w
->window_end_vpos
) >= i
)
814 w
->window_end_valid
= Qnil
;
816 while (i
< matrix
->nrows
)
817 matrix
->rows
[i
++].enabled_p
= 0;
821 for (i
= 0; i
< matrix
->nrows
; ++i
)
822 matrix
->rows
[i
].enabled_p
= 0;
825 else if (matrix
== w
->desired_matrix
)
827 /* Rows in desired matrices always have to be cleared;
828 redisplay expects this is the case when it runs, so it
829 had better be the case when we adjust matrices between
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
837 /* Remember last values to be able to optimize frame redraws. */
838 matrix
->matrix_x
= x
;
839 matrix
->matrix_y
= y
;
840 matrix
->matrix_w
= dim
.width
;
841 matrix
->matrix_h
= dim
.height
;
843 /* Record the top y location and height of W at the time the matrix
844 was last adjusted. This is used to optimize redisplay above. */
847 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
848 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
849 matrix
->window_height
= window_height
;
850 matrix
->window_width
= window_width
;
851 matrix
->window_vscroll
= w
->vscroll
;
856 /* Reverse the contents of rows in MATRIX between START and END. The
857 contents of the row at END - 1 end up at START, END - 2 at START +
858 1 etc. This is part of the implementation of rotate_matrix (see
862 reverse_rows (matrix
, start
, end
)
863 struct glyph_matrix
*matrix
;
868 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
870 /* Non-ISO HP/UX compiler doesn't like auto struct
872 struct glyph_row temp
;
873 temp
= matrix
->rows
[i
];
874 matrix
->rows
[i
] = matrix
->rows
[j
];
875 matrix
->rows
[j
] = temp
;
880 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
881 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
882 indices. (Note: this does not copy glyphs, only glyph pointers in
883 row structures are moved around).
885 The algorithm used for rotating the vector was, I believe, first
886 described by Kernighan. See the vector R as consisting of two
887 sub-vectors AB, where A has length BY for BY >= 0. The result
888 after rotating is then BA. Reverse both sub-vectors to get ArBr
889 and reverse the result to get (ArBr)r which is BA. Similar for
893 rotate_matrix (matrix
, first
, last
, by
)
894 struct glyph_matrix
*matrix
;
899 /* Up (rotate left, i.e. towards lower indices). */
901 reverse_rows (matrix
, first
, first
+ by
);
902 reverse_rows (matrix
, first
+ by
, last
);
903 reverse_rows (matrix
, first
, last
);
907 /* Down (rotate right, i.e. towards higher indices). */
908 reverse_rows (matrix
, last
- by
, last
);
909 reverse_rows (matrix
, first
, last
- by
);
910 reverse_rows (matrix
, first
, last
);
915 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
916 with indices START <= index < END. Increment positions by DELTA/
920 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
921 struct glyph_matrix
*matrix
;
922 int start
, end
, delta
, delta_bytes
;
924 /* Check that START and END are reasonable values. */
925 xassert (start
>= 0 && start
<= matrix
->nrows
);
926 xassert (end
>= 0 && end
<= matrix
->nrows
);
927 xassert (start
<= end
);
929 for (; start
< end
; ++start
)
930 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
934 /* Enable a range of rows in glyph matrix MATRIX. START and END are
935 the row indices of the first and last + 1 row to enable. If
936 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
939 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
940 struct glyph_matrix
*matrix
;
944 xassert (start
<= end
);
945 xassert (start
>= 0 && start
< matrix
->nrows
);
946 xassert (end
>= 0 && end
<= matrix
->nrows
);
948 for (; start
< end
; ++start
)
949 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
955 This empties all rows in MATRIX by setting the enabled_p flag for
956 all rows of the matrix to zero. The function prepare_desired_row
957 will eventually really clear a row when it sees one with a zero
960 Resets update hints to defaults value. The only update hint
961 currently present is the flag MATRIX->no_scrolling_p. */
964 clear_glyph_matrix (matrix
)
965 struct glyph_matrix
*matrix
;
969 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
970 matrix
->no_scrolling_p
= 0;
975 /* Shift part of the glyph matrix MATRIX of window W up or down.
976 Increment y-positions in glyph rows between START and END by DY,
977 and recompute their visible height. */
980 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
982 struct glyph_matrix
*matrix
;
987 xassert (start
<= end
);
988 xassert (start
>= 0 && start
< matrix
->nrows
);
989 xassert (end
>= 0 && end
<= matrix
->nrows
);
991 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
992 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
994 for (; start
< end
; ++start
)
996 struct glyph_row
*row
= &matrix
->rows
[start
];
999 row
->visible_height
= row
->height
;
1002 row
->visible_height
-= min_y
- row
->y
;
1003 if (row
->y
+ row
->height
> max_y
)
1004 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1009 /* Mark all rows in current matrices of frame F as invalid. Marking
1010 invalid is done by setting enabled_p to zero for all rows in a
1014 clear_current_matrices (f
)
1015 register struct frame
*f
;
1017 /* Clear frame current matrix, if we have one. */
1018 if (f
->current_matrix
)
1019 clear_glyph_matrix (f
->current_matrix
);
1021 /* Clear the matrix of the menu bar window, if such a window exists.
1022 The menu bar window is currently used to display menus on X when
1023 no toolkit support is compiled in. */
1024 if (WINDOWP (f
->menu_bar_window
))
1025 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1027 /* Clear the matrix of the tool-bar window, if any. */
1028 if (WINDOWP (f
->tool_bar_window
))
1029 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1031 /* Clear current window matrices. */
1032 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1033 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1037 /* Clear out all display lines of F for a coming redisplay. */
1040 clear_desired_matrices (f
)
1041 register struct frame
*f
;
1043 if (f
->desired_matrix
)
1044 clear_glyph_matrix (f
->desired_matrix
);
1046 if (WINDOWP (f
->menu_bar_window
))
1047 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1049 if (WINDOWP (f
->tool_bar_window
))
1050 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1052 /* Do it for window matrices. */
1053 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1054 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1058 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1059 non-zero clear desired matrices, otherwise clear current matrices. */
1062 clear_window_matrices (w
, desired_p
)
1068 if (!NILP (w
->hchild
))
1070 xassert (WINDOWP (w
->hchild
));
1071 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1073 else if (!NILP (w
->vchild
))
1075 xassert (WINDOWP (w
->vchild
));
1076 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1081 clear_glyph_matrix (w
->desired_matrix
);
1084 clear_glyph_matrix (w
->current_matrix
);
1085 w
->window_end_valid
= Qnil
;
1089 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1095 /***********************************************************************
1098 See dispextern.h for an overall explanation of glyph rows.
1099 ***********************************************************************/
1101 /* Clear glyph row ROW. Do it in a way that makes it robust against
1102 changes in the glyph_row structure, i.e. addition or removal of
1103 structure members. */
1105 static struct glyph_row null_row
;
1108 clear_glyph_row (row
)
1109 struct glyph_row
*row
;
1111 struct glyph
*p
[1 + LAST_AREA
];
1113 /* Save pointers. */
1114 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1115 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1116 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1117 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1122 /* Restore pointers. */
1123 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1124 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1125 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1126 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1128 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1129 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1130 Redisplay outputs such glyphs, and flickering effects were
1131 the result. This also depended on the contents of memory
1132 returned by xmalloc. If flickering happens again, activate
1133 the code below. If the flickering is gone with that, chances
1134 are that the flickering has the same reason as here. */
1135 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1140 /* Make ROW an empty, enabled row of canonical character height,
1141 in window W starting at y-position Y. */
1144 blank_row (w
, row
, y
)
1146 struct glyph_row
*row
;
1151 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1152 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1154 clear_glyph_row (row
);
1156 row
->ascent
= row
->phys_ascent
= 0;
1157 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1158 row
->visible_height
= row
->height
;
1161 row
->visible_height
-= min_y
- row
->y
;
1162 if (row
->y
+ row
->height
> max_y
)
1163 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1169 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1170 are the amounts by which to change positions. Note that the first
1171 glyph of the text area of a row can have a buffer position even if
1172 the used count of the text area is zero. Such rows display line
1176 increment_row_positions (row
, delta
, delta_bytes
)
1177 struct glyph_row
*row
;
1178 int delta
, delta_bytes
;
1182 /* Increment start and end positions. */
1183 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1184 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1185 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1186 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1188 if (!row
->enabled_p
)
1191 /* Increment positions in glyphs. */
1192 for (area
= 0; area
< LAST_AREA
; ++area
)
1193 for (i
= 0; i
< row
->used
[area
]; ++i
)
1194 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1195 && row
->glyphs
[area
][i
].charpos
> 0)
1196 row
->glyphs
[area
][i
].charpos
+= delta
;
1198 /* Capture the case of rows displaying a line end. */
1199 if (row
->used
[TEXT_AREA
] == 0
1200 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1201 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1206 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1207 contents, i.e. glyph structure contents are exchanged between A and
1208 B without changing glyph pointers in A and B. */
1211 swap_glyphs_in_rows (a
, b
)
1212 struct glyph_row
*a
, *b
;
1216 for (area
= 0; area
< LAST_AREA
; ++area
)
1218 /* Number of glyphs to swap. */
1219 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1221 /* Start of glyphs in area of row A. */
1222 struct glyph
*glyph_a
= a
->glyphs
[area
];
1224 /* End + 1 of glyphs in area of row A. */
1225 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1227 /* Start of glyphs in area of row B. */
1228 struct glyph
*glyph_b
= b
->glyphs
[area
];
1230 while (glyph_a
< glyph_a_end
)
1232 /* Non-ISO HP/UX compiler doesn't like auto struct
1236 *glyph_a
= *glyph_b
;
1246 /* Exchange pointers to glyph memory between glyph rows A and B. */
1249 swap_glyph_pointers (a
, b
)
1250 struct glyph_row
*a
, *b
;
1253 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1255 struct glyph
*temp
= a
->glyphs
[i
];
1256 a
->glyphs
[i
] = b
->glyphs
[i
];
1257 b
->glyphs
[i
] = temp
;
1262 /* Copy glyph row structure FROM to glyph row structure TO, except
1263 that glyph pointers in the structures are left unchanged. */
1266 copy_row_except_pointers (to
, from
)
1267 struct glyph_row
*to
, *from
;
1269 struct glyph
*pointers
[1 + LAST_AREA
];
1271 /* Save glyph pointers of TO. */
1272 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1274 /* Do a structure assignment. */
1277 /* Restore original pointers of TO. */
1278 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1282 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1283 TO and FROM are left unchanged. Glyph contents are copied from the
1284 glyph memory of FROM to the glyph memory of TO. Increment buffer
1285 positions in row TO by DELTA/ DELTA_BYTES. */
1288 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1289 struct glyph_row
*to
, *from
;
1290 int delta
, delta_bytes
;
1294 /* This is like a structure assignment TO = FROM, except that
1295 glyph pointers in the rows are left unchanged. */
1296 copy_row_except_pointers (to
, from
);
1298 /* Copy glyphs from FROM to TO. */
1299 for (area
= 0; area
< LAST_AREA
; ++area
)
1300 if (from
->used
[area
])
1301 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1302 from
->used
[area
] * sizeof (struct glyph
));
1304 /* Increment buffer positions in TO by DELTA. */
1305 increment_row_positions (to
, delta
, delta_bytes
);
1309 /* Assign glyph row FROM to glyph row TO. This works like a structure
1310 assignment TO = FROM, except that glyph pointers are not copied but
1311 exchanged between TO and FROM. Pointers must be exchanged to avoid
1315 assign_row (to
, from
)
1316 struct glyph_row
*to
, *from
;
1318 swap_glyph_pointers (to
, from
);
1319 copy_row_except_pointers (to
, from
);
1323 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1324 a row in a window matrix, is a slice of the glyph memory of the
1325 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1326 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1327 memory of FRAME_ROW. */
1332 glyph_row_slice_p (window_row
, frame_row
)
1333 struct glyph_row
*window_row
, *frame_row
;
1335 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1336 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1337 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1339 return (frame_glyph_start
<= window_glyph_start
1340 && window_glyph_start
< frame_glyph_end
);
1343 #endif /* GLYPH_DEBUG */
1347 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1348 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1349 in WINDOW_MATRIX is found satisfying the condition. */
1351 static struct glyph_row
*
1352 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1353 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1358 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1360 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1361 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1362 frame_matrix
->rows
+ row
))
1365 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1370 /* Prepare ROW for display. Desired rows are cleared lazily,
1371 i.e. they are only marked as to be cleared by setting their
1372 enabled_p flag to zero. When a row is to be displayed, a prior
1373 call to this function really clears it. */
1376 prepare_desired_row (row
)
1377 struct glyph_row
*row
;
1379 if (!row
->enabled_p
)
1381 clear_glyph_row (row
);
1387 /* Return a hash code for glyph row ROW. */
1390 line_hash_code (row
)
1391 struct glyph_row
*row
;
1397 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1398 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1402 int c
= glyph
->u
.ch
;
1403 int face_id
= glyph
->face_id
;
1404 if (must_write_spaces
)
1406 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1407 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1419 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1420 the number of characters in the line. If must_write_spaces is
1421 zero, leading and trailing spaces are ignored. */
1424 line_draw_cost (matrix
, vpos
)
1425 struct glyph_matrix
*matrix
;
1428 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1429 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1430 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1432 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1433 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1435 /* Ignore trailing and leading spaces if we can. */
1436 if (!must_write_spaces
)
1438 /* Skip from the end over trailing spaces. */
1439 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1442 /* All blank line. */
1446 /* Skip over leading spaces. */
1447 while (CHAR_GLYPH_SPACE_P (*beg
))
1451 /* If we don't have a glyph-table, each glyph is one character,
1452 so return the number of glyphs. */
1453 if (glyph_table_base
== 0)
1457 /* Otherwise, scan the glyphs and accumulate their total length
1462 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1465 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1468 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1478 /* Test two glyph rows A and B for equality. Value is non-zero if A
1479 and B have equal contents. W is the window to which the glyphs
1480 rows A and B belong. It is needed here to test for partial row
1481 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1482 flags of A and B, too. */
1485 row_equal_p (w
, a
, b
, mouse_face_p
)
1487 struct glyph_row
*a
, *b
;
1492 else if (a
->hash
!= b
->hash
)
1496 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1499 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1502 /* Compare glyphs. */
1503 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1505 if (a
->used
[area
] != b
->used
[area
])
1508 a_glyph
= a
->glyphs
[area
];
1509 a_end
= a_glyph
+ a
->used
[area
];
1510 b_glyph
= b
->glyphs
[area
];
1512 while (a_glyph
< a_end
1513 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1514 ++a_glyph
, ++b_glyph
;
1516 if (a_glyph
!= a_end
)
1520 if (a
->fill_line_p
!= b
->fill_line_p
1521 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1522 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1523 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1524 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1525 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1526 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1527 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1528 || a
->overlapped_p
!= b
->overlapped_p
1529 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1530 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1531 /* Different partially visible characters on left margin. */
1533 /* Different height. */
1534 || a
->ascent
!= b
->ascent
1535 || a
->phys_ascent
!= b
->phys_ascent
1536 || a
->phys_height
!= b
->phys_height
1537 || a
->visible_height
!= b
->visible_height
)
1546 /***********************************************************************
1549 See dispextern.h for an overall explanation of glyph pools.
1550 ***********************************************************************/
1552 /* Allocate a glyph_pool structure. The structure returned is
1553 initialized with zeros. The global variable glyph_pool_count is
1554 incremented for each pool allocated. */
1556 static struct glyph_pool
*
1559 struct glyph_pool
*result
;
1561 /* Allocate a new glyph_pool and clear it. */
1562 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1563 bzero (result
, sizeof *result
);
1565 /* For memory leak and double deletion checking. */
1572 /* Free a glyph_pool structure POOL. The function may be called with
1573 a null POOL pointer. The global variable glyph_pool_count is
1574 decremented with every pool structure freed. If this count gets
1575 negative, more structures were freed than allocated, i.e. one
1576 structure must have been freed more than once or a bogus pointer
1577 was passed to free_glyph_pool. */
1580 free_glyph_pool (pool
)
1581 struct glyph_pool
*pool
;
1585 /* More freed than allocated? */
1587 xassert (glyph_pool_count
>= 0);
1589 xfree (pool
->glyphs
);
1595 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1596 columns we need. This function never shrinks a pool. The only
1597 case in which this would make sense, would be when a frame's size
1598 is changed from a large value to a smaller one. But, if someone
1599 does it once, we can expect that he will do it again.
1601 Value is non-zero if the pool changed in a way which makes
1602 re-adjusting window glyph matrices necessary. */
1605 realloc_glyph_pool (pool
, matrix_dim
)
1606 struct glyph_pool
*pool
;
1607 struct dim matrix_dim
;
1612 changed_p
= (pool
->glyphs
== 0
1613 || matrix_dim
.height
!= pool
->nrows
1614 || matrix_dim
.width
!= pool
->ncolumns
);
1616 /* Enlarge the glyph pool. */
1617 needed
= matrix_dim
.width
* matrix_dim
.height
;
1618 if (needed
> pool
->nglyphs
)
1620 int size
= needed
* sizeof (struct glyph
);
1623 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1626 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1627 bzero (pool
->glyphs
, size
);
1630 pool
->nglyphs
= needed
;
1633 /* Remember the number of rows and columns because (a) we use them
1634 to do sanity checks, and (b) the number of columns determines
1635 where rows in the frame matrix start---this must be available to
1636 determine pointers to rows of window sub-matrices. */
1637 pool
->nrows
= matrix_dim
.height
;
1638 pool
->ncolumns
= matrix_dim
.width
;
1645 /***********************************************************************
1647 ***********************************************************************/
1652 /* Flush standard output. This is sometimes useful to call from
1662 /* Check that no glyph pointers have been lost in MATRIX. If a
1663 pointer has been lost, e.g. by using a structure assignment between
1664 rows, at least one pointer must occur more than once in the rows of
1668 check_matrix_pointer_lossage (matrix
)
1669 struct glyph_matrix
*matrix
;
1673 for (i
= 0; i
< matrix
->nrows
; ++i
)
1674 for (j
= 0; j
< matrix
->nrows
; ++j
)
1676 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1677 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1681 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1684 matrix_row (matrix
, row
)
1685 struct glyph_matrix
*matrix
;
1688 xassert (matrix
&& matrix
->rows
);
1689 xassert (row
>= 0 && row
< matrix
->nrows
);
1691 /* That's really too slow for normal testing because this function
1692 is called almost everywhere. Although---it's still astonishingly
1693 fast, so it is valuable to have for debugging purposes. */
1695 check_matrix_pointer_lossage (matrix
);
1698 return matrix
->rows
+ row
;
1702 #if 0 /* This function makes invalid assumptions when text is
1703 partially invisible. But it might come handy for debugging
1706 /* Check invariants that must hold for an up to date current matrix of
1710 check_matrix_invariants (w
)
1713 struct glyph_matrix
*matrix
= w
->current_matrix
;
1714 int yb
= window_text_bottom_y (w
);
1715 struct glyph_row
*row
= matrix
->rows
;
1716 struct glyph_row
*last_text_row
= NULL
;
1717 struct buffer
*saved
= current_buffer
;
1718 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1721 /* This can sometimes happen for a fresh window. */
1722 if (matrix
->nrows
< 2)
1725 set_buffer_temp (buffer
);
1727 /* Note: last row is always reserved for the mode line. */
1728 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1729 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1731 struct glyph_row
*next
= row
+ 1;
1733 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1734 last_text_row
= row
;
1736 /* Check that character and byte positions are in sync. */
1737 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1738 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1740 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1741 have such a position temporarily in case of a minibuffer
1742 displaying something like `[Sole completion]' at its end. */
1743 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1744 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1745 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1747 /* Check that end position of `row' is equal to start position
1749 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1751 xassert (MATRIX_ROW_END_CHARPOS (row
)
1752 == MATRIX_ROW_START_CHARPOS (next
));
1753 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1754 == MATRIX_ROW_START_BYTEPOS (next
));
1759 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1760 xassert (w
->desired_matrix
->rows
!= NULL
);
1761 set_buffer_temp (saved
);
1766 #endif /* GLYPH_DEBUG != 0 */
1770 /**********************************************************************
1771 Allocating/ Adjusting Glyph Matrices
1772 **********************************************************************/
1774 /* Allocate glyph matrices over a window tree for a frame-based
1777 X and Y are column/row within the frame glyph matrix where
1778 sub-matrices for the window tree rooted at WINDOW must be
1779 allocated. CH_DIM contains the dimensions of the smallest
1780 character that could be used during display. DIM_ONLY_P non-zero
1781 means that the caller of this function is only interested in the
1782 result matrix dimension, and matrix adjustments should not be
1785 The function returns the total width/height of the sub-matrices of
1786 the window tree. If called on a frame root window, the computation
1787 will take the mini-buffer window into account.
1789 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1791 NEW_LEAF_MATRIX set if any window in the tree did not have a
1792 glyph matrices yet, and
1794 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1795 any window in the tree will be changed or have been changed (see
1798 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1801 Windows are arranged into chains of windows on the same level
1802 through the next fields of window structures. Such a level can be
1803 either a sequence of horizontally adjacent windows from left to
1804 right, or a sequence of vertically adjacent windows from top to
1805 bottom. Each window in a horizontal sequence can be either a leaf
1806 window or a vertical sequence; a window in a vertical sequence can
1807 be either a leaf or a horizontal sequence. All windows in a
1808 horizontal sequence have the same height, and all windows in a
1809 vertical sequence have the same width.
1811 This function uses, for historical reasons, a more general
1812 algorithm to determine glyph matrix dimensions that would be
1815 The matrix height of a horizontal sequence is determined by the
1816 maximum height of any matrix in the sequence. The matrix width of
1817 a horizontal sequence is computed by adding up matrix widths of
1818 windows in the sequence.
1820 |<------- result width ------->|
1821 +---------+----------+---------+ ---
1824 +---------+ | | result height
1829 The matrix width of a vertical sequence is the maximum matrix width
1830 of any window in the sequence. Its height is computed by adding up
1831 matrix heights of windows in the sequence.
1833 |<---- result width -->|
1841 +------------+---------+ |
1844 +------------+---------+ --- */
1846 /* Bit indicating that a new matrix will be allocated or has been
1849 #define NEW_LEAF_MATRIX (1 << 0)
1851 /* Bit indicating that a matrix will or has changed its location or
1854 #define CHANGED_LEAF_MATRIX (1 << 1)
1857 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1858 window_change_flags
)
1862 int *window_change_flags
;
1864 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1866 int wmax
= 0, hmax
= 0;
1870 int in_horz_combination_p
;
1872 /* What combination is WINDOW part of? Compute this once since the
1873 result is the same for all windows in the `next' chain. The
1874 special case of a root window (parent equal to nil) is treated
1875 like a vertical combination because a root window's `next'
1876 points to the mini-buffer window, if any, which is arranged
1877 vertically below other windows. */
1878 in_horz_combination_p
1879 = (!NILP (XWINDOW (window
)->parent
)
1880 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1882 /* For WINDOW and all windows on the same level. */
1885 w
= XWINDOW (window
);
1887 /* Get the dimension of the window sub-matrix for W, depending
1888 on whether this is a combination or a leaf window. */
1889 if (!NILP (w
->hchild
))
1890 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1892 window_change_flags
);
1893 else if (!NILP (w
->vchild
))
1894 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1896 window_change_flags
);
1899 /* If not already done, allocate sub-matrix structures. */
1900 if (w
->desired_matrix
== NULL
)
1902 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1903 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1904 *window_change_flags
|= NEW_LEAF_MATRIX
;
1907 /* Width and height MUST be chosen so that there are no
1908 holes in the frame matrix. */
1909 dim
.width
= required_matrix_width (w
);
1910 dim
.height
= required_matrix_height (w
);
1912 /* Will matrix be re-allocated? */
1913 if (x
!= w
->desired_matrix
->matrix_x
1914 || y
!= w
->desired_matrix
->matrix_y
1915 || dim
.width
!= w
->desired_matrix
->matrix_w
1916 || dim
.height
!= w
->desired_matrix
->matrix_h
1917 || (margin_glyphs_to_reserve (w
, dim
.width
,
1918 w
->left_margin_cols
)
1919 != w
->desired_matrix
->left_margin_glyphs
)
1920 || (margin_glyphs_to_reserve (w
, dim
.width
,
1921 w
->right_margin_cols
)
1922 != w
->desired_matrix
->right_margin_glyphs
))
1923 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1925 /* Actually change matrices, if allowed. Do not consider
1926 CHANGED_LEAF_MATRIX computed above here because the pool
1927 may have been changed which we don't now here. We trust
1928 that we only will be called with DIM_ONLY_P != 0 when
1932 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1933 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1937 /* If we are part of a horizontal combination, advance x for
1938 windows to the right of W; otherwise advance y for windows
1940 if (in_horz_combination_p
)
1945 /* Remember maximum glyph matrix dimensions. */
1946 wmax
= max (wmax
, dim
.width
);
1947 hmax
= max (hmax
, dim
.height
);
1949 /* Next window on same level. */
1952 while (!NILP (window
));
1954 /* Set `total' to the total glyph matrix dimension of this window
1955 level. In a vertical combination, the width is the width of the
1956 widest window; the height is the y we finally reached, corrected
1957 by the y we started with. In a horizontal combination, the total
1958 height is the height of the tallest window, and the width is the
1959 x we finally reached, corrected by the x we started with. */
1960 if (in_horz_combination_p
)
1962 total
.width
= x
- x0
;
1963 total
.height
= hmax
;
1968 total
.height
= y
- y0
;
1975 /* Return the required height of glyph matrices for window W. */
1978 required_matrix_height (w
)
1981 #ifdef HAVE_WINDOW_SYSTEM
1982 struct frame
*f
= XFRAME (w
->frame
);
1984 if (FRAME_WINDOW_P (f
))
1986 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1987 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1988 return (((window_pixel_height
+ ch_height
- 1)
1989 / ch_height
) * w
->nrows_scale_factor
1990 /* One partially visible line at the top and
1991 bottom of the window. */
1993 /* 2 for header and mode line. */
1996 #endif /* HAVE_WINDOW_SYSTEM */
1998 return WINDOW_TOTAL_LINES (w
);
2002 /* Return the required width of glyph matrices for window W. */
2005 required_matrix_width (w
)
2008 #ifdef HAVE_WINDOW_SYSTEM
2009 struct frame
*f
= XFRAME (w
->frame
);
2010 if (FRAME_WINDOW_P (f
))
2012 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2013 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2015 /* Compute number of glyphs needed in a glyph row. */
2016 return (((window_pixel_width
+ ch_width
- 1)
2017 / ch_width
) * w
->ncols_scale_factor
2018 /* 2 partially visible columns in the text area. */
2020 /* One partially visible column at the right
2021 edge of each marginal area. */
2024 #endif /* HAVE_WINDOW_SYSTEM */
2026 return XINT (w
->total_cols
);
2030 /* Allocate window matrices for window-based redisplay. W is the
2031 window whose matrices must be allocated/reallocated. CH_DIM is the
2032 size of the smallest character that could potentially be used on W. */
2035 allocate_matrices_for_window_redisplay (w
)
2040 if (!NILP (w
->vchild
))
2041 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2042 else if (!NILP (w
->hchild
))
2043 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2046 /* W is a leaf window. */
2049 /* If matrices are not yet allocated, allocate them now. */
2050 if (w
->desired_matrix
== NULL
)
2052 w
->desired_matrix
= new_glyph_matrix (NULL
);
2053 w
->current_matrix
= new_glyph_matrix (NULL
);
2056 dim
.width
= required_matrix_width (w
);
2057 dim
.height
= required_matrix_height (w
);
2058 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2059 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2062 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2067 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2068 do it for all frames; otherwise do it just for the given frame.
2069 This function must be called when a new frame is created, its size
2070 changes, or its window configuration changes. */
2076 /* Block input so that expose events and other events that access
2077 glyph matrices are not processed while we are changing them. */
2081 adjust_frame_glyphs (f
);
2084 Lisp_Object tail
, lisp_frame
;
2086 FOR_EACH_FRAME (tail
, lisp_frame
)
2087 adjust_frame_glyphs (XFRAME (lisp_frame
));
2094 /* Adjust frame glyphs when Emacs is initialized.
2096 To be called from init_display.
2098 We need a glyph matrix because redraw will happen soon.
2099 Unfortunately, window sizes on selected_frame are not yet set to
2100 meaningful values. I believe we can assume that there are only two
2101 windows on the frame---the mini-buffer and the root window. Frame
2102 height and width seem to be correct so far. So, set the sizes of
2103 windows to estimated values. */
2106 adjust_frame_glyphs_initially ()
2108 struct frame
*sf
= SELECTED_FRAME ();
2109 struct window
*root
= XWINDOW (sf
->root_window
);
2110 struct window
*mini
= XWINDOW (root
->next
);
2111 int frame_lines
= FRAME_LINES (sf
);
2112 int frame_cols
= FRAME_COLS (sf
);
2113 int top_margin
= FRAME_TOP_MARGIN (sf
);
2115 /* Do it for the root window. */
2116 XSETFASTINT (root
->top_line
, top_margin
);
2117 XSETFASTINT (root
->total_cols
, frame_cols
);
2118 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2120 /* Do it for the mini-buffer window. */
2121 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2122 XSETFASTINT (mini
->total_cols
, frame_cols
);
2123 set_window_height (root
->next
, 1, 0);
2125 adjust_frame_glyphs (sf
);
2126 glyphs_initialized_initially_p
= 1;
2130 /* Allocate/reallocate glyph matrices of a single frame F. */
2133 adjust_frame_glyphs (f
)
2136 if (FRAME_WINDOW_P (f
))
2137 adjust_frame_glyphs_for_window_redisplay (f
);
2139 adjust_frame_glyphs_for_frame_redisplay (f
);
2141 /* Don't forget the message buffer and the buffer for
2142 decode_mode_spec. */
2143 adjust_frame_message_buffer (f
);
2144 adjust_decode_mode_spec_buffer (f
);
2146 f
->glyphs_initialized_p
= 1;
2150 /* In the window tree with root W, build current matrices of leaf
2151 windows from the frame's current matrix. */
2154 fake_current_matrices (window
)
2159 for (; !NILP (window
); window
= w
->next
)
2161 w
= XWINDOW (window
);
2163 if (!NILP (w
->hchild
))
2164 fake_current_matrices (w
->hchild
);
2165 else if (!NILP (w
->vchild
))
2166 fake_current_matrices (w
->vchild
);
2170 struct frame
*f
= XFRAME (w
->frame
);
2171 struct glyph_matrix
*m
= w
->current_matrix
;
2172 struct glyph_matrix
*fm
= f
->current_matrix
;
2174 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2175 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2177 for (i
= 0; i
< m
->matrix_h
; ++i
)
2179 struct glyph_row
*r
= m
->rows
+ i
;
2180 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2182 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2183 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2185 r
->enabled_p
= fr
->enabled_p
;
2188 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2189 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2190 r
->used
[TEXT_AREA
] = (m
->matrix_w
2191 - r
->used
[LEFT_MARGIN_AREA
]
2192 - r
->used
[RIGHT_MARGIN_AREA
]);
2201 /* Save away the contents of frame F's current frame matrix. Value is
2202 a glyph matrix holding the contents of F's current frame matrix. */
2204 static struct glyph_matrix
*
2205 save_current_matrix (f
)
2209 struct glyph_matrix
*saved
;
2211 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2212 bzero (saved
, sizeof *saved
);
2213 saved
->nrows
= f
->current_matrix
->nrows
;
2214 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2215 * sizeof *saved
->rows
);
2216 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2218 for (i
= 0; i
< saved
->nrows
; ++i
)
2220 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2221 struct glyph_row
*to
= saved
->rows
+ i
;
2222 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2223 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2224 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2225 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2232 /* Restore the contents of frame F's current frame matrix from SAVED,
2233 and free memory associated with SAVED. */
2236 restore_current_matrix (f
, saved
)
2238 struct glyph_matrix
*saved
;
2242 for (i
= 0; i
< saved
->nrows
; ++i
)
2244 struct glyph_row
*from
= saved
->rows
+ i
;
2245 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2246 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2247 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2248 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2249 xfree (from
->glyphs
[TEXT_AREA
]);
2252 xfree (saved
->rows
);
2258 /* Allocate/reallocate glyph matrices of a single frame F for
2259 frame-based redisplay. */
2262 adjust_frame_glyphs_for_frame_redisplay (f
)
2266 struct dim matrix_dim
;
2268 int window_change_flags
;
2271 if (!FRAME_LIVE_P (f
))
2274 /* Determine the smallest character in any font for F. On
2275 console windows, all characters have dimension (1, 1). */
2276 ch_dim
.width
= ch_dim
.height
= 1;
2278 top_window_y
= FRAME_TOP_MARGIN (f
);
2280 /* Allocate glyph pool structures if not already done. */
2281 if (f
->desired_pool
== NULL
)
2283 f
->desired_pool
= new_glyph_pool ();
2284 f
->current_pool
= new_glyph_pool ();
2287 /* Allocate frames matrix structures if needed. */
2288 if (f
->desired_matrix
== NULL
)
2290 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2291 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2294 /* Compute window glyph matrices. (This takes the mini-buffer
2295 window into account). The result is the size of the frame glyph
2296 matrix needed. The variable window_change_flags is set to a bit
2297 mask indicating whether new matrices will be allocated or
2298 existing matrices change their size or location within the frame
2300 window_change_flags
= 0;
2302 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2305 &window_change_flags
);
2307 /* Add in menu bar lines, if any. */
2308 matrix_dim
.height
+= top_window_y
;
2310 /* Enlarge pools as necessary. */
2311 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2312 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2314 /* Set up glyph pointers within window matrices. Do this only if
2315 absolutely necessary since it requires a frame redraw. */
2316 if (pool_changed_p
|| window_change_flags
)
2318 /* Do it for window matrices. */
2319 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2321 &window_change_flags
);
2323 /* Size of frame matrices must equal size of frame. Note
2324 that we are called for X frames with window widths NOT equal
2325 to the frame width (from CHANGE_FRAME_SIZE_1). */
2326 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2327 && matrix_dim
.height
== FRAME_LINES (f
));
2329 /* Pointers to glyph memory in glyph rows are exchanged during
2330 the update phase of redisplay, which means in general that a
2331 frame's current matrix consists of pointers into both the
2332 desired and current glyph pool of the frame. Adjusting a
2333 matrix sets the frame matrix up so that pointers are all into
2334 the same pool. If we want to preserve glyph contents of the
2335 current matrix over a call to adjust_glyph_matrix, we must
2336 make a copy of the current glyphs, and restore the current
2337 matrix' contents from that copy. */
2338 if (display_completed
2339 && !FRAME_GARBAGED_P (f
)
2340 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2341 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2343 struct glyph_matrix
*copy
= save_current_matrix (f
);
2344 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2345 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2346 restore_current_matrix (f
, copy
);
2347 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2351 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2352 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2353 SET_FRAME_GARBAGED (f
);
2359 /* Allocate/reallocate glyph matrices of a single frame F for
2360 window-based redisplay. */
2363 adjust_frame_glyphs_for_window_redisplay (f
)
2369 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2371 /* Get minimum sizes. */
2372 #ifdef HAVE_WINDOW_SYSTEM
2373 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2374 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2376 ch_dim
.width
= ch_dim
.height
= 1;
2379 /* Allocate/reallocate window matrices. */
2380 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2382 /* Allocate/ reallocate matrices of the dummy window used to display
2383 the menu bar under X when no X toolkit support is available. */
2384 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2386 /* Allocate a dummy window if not already done. */
2387 if (NILP (f
->menu_bar_window
))
2389 f
->menu_bar_window
= make_window ();
2390 w
= XWINDOW (f
->menu_bar_window
);
2391 XSETFRAME (w
->frame
, f
);
2392 w
->pseudo_window_p
= 1;
2395 w
= XWINDOW (f
->menu_bar_window
);
2397 /* Set window dimensions to frame dimensions and allocate or
2398 adjust glyph matrices of W. */
2399 XSETFASTINT (w
->top_line
, 0);
2400 XSETFASTINT (w
->left_col
, 0);
2401 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2402 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2403 allocate_matrices_for_window_redisplay (w
);
2405 #endif /* not USE_X_TOOLKIT */
2408 /* Allocate/ reallocate matrices of the tool bar window. If we
2409 don't have a tool bar window yet, make one. */
2410 if (NILP (f
->tool_bar_window
))
2412 f
->tool_bar_window
= make_window ();
2413 w
= XWINDOW (f
->tool_bar_window
);
2414 XSETFRAME (w
->frame
, f
);
2415 w
->pseudo_window_p
= 1;
2418 w
= XWINDOW (f
->tool_bar_window
);
2420 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2421 XSETFASTINT (w
->left_col
, 0);
2422 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2423 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2424 allocate_matrices_for_window_redisplay (w
);
2429 /* Adjust/ allocate message buffer of frame F.
2431 Note that the message buffer is never freed. Since I could not
2432 find a free in 19.34, I assume that freeing it would be
2433 problematic in some way and don't do it either.
2435 (Implementation note: It should be checked if we can free it
2436 eventually without causing trouble). */
2439 adjust_frame_message_buffer (f
)
2442 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2444 if (FRAME_MESSAGE_BUF (f
))
2446 char *buffer
= FRAME_MESSAGE_BUF (f
);
2447 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2448 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2451 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2455 /* Re-allocate buffer for decode_mode_spec on frame F. */
2458 adjust_decode_mode_spec_buffer (f
)
2461 f
->decode_mode_spec_buffer
2462 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2463 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2468 /**********************************************************************
2469 Freeing Glyph Matrices
2470 **********************************************************************/
2472 /* Free glyph memory for a frame F. F may be null. This function can
2473 be called for the same frame more than once. The root window of
2474 F may be nil when this function is called. This is the case when
2475 the function is called when F is destroyed. */
2481 if (f
&& f
->glyphs_initialized_p
)
2483 /* Block interrupt input so that we don't get surprised by an X
2484 event while we're in an inconsistent state. */
2486 f
->glyphs_initialized_p
= 0;
2488 /* Release window sub-matrices. */
2489 if (!NILP (f
->root_window
))
2490 free_window_matrices (XWINDOW (f
->root_window
));
2492 /* Free the dummy window for menu bars without X toolkit and its
2494 if (!NILP (f
->menu_bar_window
))
2496 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2497 free_glyph_matrix (w
->desired_matrix
);
2498 free_glyph_matrix (w
->current_matrix
);
2499 w
->desired_matrix
= w
->current_matrix
= NULL
;
2500 f
->menu_bar_window
= Qnil
;
2503 /* Free the tool bar window and its glyph matrices. */
2504 if (!NILP (f
->tool_bar_window
))
2506 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2507 free_glyph_matrix (w
->desired_matrix
);
2508 free_glyph_matrix (w
->current_matrix
);
2509 w
->desired_matrix
= w
->current_matrix
= NULL
;
2510 f
->tool_bar_window
= Qnil
;
2513 /* Release frame glyph matrices. Reset fields to zero in
2514 case we are called a second time. */
2515 if (f
->desired_matrix
)
2517 free_glyph_matrix (f
->desired_matrix
);
2518 free_glyph_matrix (f
->current_matrix
);
2519 f
->desired_matrix
= f
->current_matrix
= NULL
;
2522 /* Release glyph pools. */
2523 if (f
->desired_pool
)
2525 free_glyph_pool (f
->desired_pool
);
2526 free_glyph_pool (f
->current_pool
);
2527 f
->desired_pool
= f
->current_pool
= NULL
;
2535 /* Free glyph sub-matrices in the window tree rooted at W. This
2536 function may be called with a null pointer, and it may be called on
2537 the same tree more than once. */
2540 free_window_matrices (w
)
2545 if (!NILP (w
->hchild
))
2546 free_window_matrices (XWINDOW (w
->hchild
));
2547 else if (!NILP (w
->vchild
))
2548 free_window_matrices (XWINDOW (w
->vchild
));
2551 /* This is a leaf window. Free its memory and reset fields
2552 to zero in case this function is called a second time for
2554 free_glyph_matrix (w
->current_matrix
);
2555 free_glyph_matrix (w
->desired_matrix
);
2556 w
->current_matrix
= w
->desired_matrix
= NULL
;
2559 /* Next window on same level. */
2560 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2565 /* Check glyph memory leaks. This function is called from
2566 shut_down_emacs. Note that frames are not destroyed when Emacs
2567 exits. We therefore free all glyph memory for all active frames
2568 explicitly and check that nothing is left allocated. */
2571 check_glyph_memory ()
2573 Lisp_Object tail
, frame
;
2575 /* Free glyph memory for all frames. */
2576 FOR_EACH_FRAME (tail
, frame
)
2577 free_glyphs (XFRAME (frame
));
2579 /* Check that nothing is left allocated. */
2580 if (glyph_matrix_count
)
2582 if (glyph_pool_count
)
2588 /**********************************************************************
2589 Building a Frame Matrix
2590 **********************************************************************/
2592 /* Most of the redisplay code works on glyph matrices attached to
2593 windows. This is a good solution most of the time, but it is not
2594 suitable for terminal code. Terminal output functions cannot rely
2595 on being able to set an arbitrary terminal window. Instead they
2596 must be provided with a view of the whole frame, i.e. the whole
2597 screen. We build such a view by constructing a frame matrix from
2598 window matrices in this section.
2600 Windows that must be updated have their must_be_update_p flag set.
2601 For all such windows, their desired matrix is made part of the
2602 desired frame matrix. For other windows, their current matrix is
2603 made part of the desired frame matrix.
2605 +-----------------+----------------+
2606 | desired | desired |
2608 +-----------------+----------------+
2611 +----------------------------------+
2613 Desired window matrices can be made part of the frame matrix in a
2614 cheap way: We exploit the fact that the desired frame matrix and
2615 desired window matrices share their glyph memory. This is not
2616 possible for current window matrices. Their glyphs are copied to
2617 the desired frame matrix. The latter is equivalent to
2618 preserve_other_columns in the old redisplay.
2620 Used glyphs counters for frame matrix rows are the result of adding
2621 up glyph lengths of the window matrices. A line in the frame
2622 matrix is enabled, if a corresponding line in a window matrix is
2625 After building the desired frame matrix, it will be passed to
2626 terminal code, which will manipulate both the desired and current
2627 frame matrix. Changes applied to the frame's current matrix have
2628 to be visible in current window matrices afterwards, of course.
2630 This problem is solved like this:
2632 1. Window and frame matrices share glyphs. Window matrices are
2633 constructed in a way that their glyph contents ARE the glyph
2634 contents needed in a frame matrix. Thus, any modification of
2635 glyphs done in terminal code will be reflected in window matrices
2638 2. Exchanges of rows in a frame matrix done by terminal code are
2639 intercepted by hook functions so that corresponding row operations
2640 on window matrices can be performed. This is necessary because we
2641 use pointers to glyphs in glyph row structures. To satisfy the
2642 assumption of point 1 above that glyphs are updated implicitly in
2643 window matrices when they are manipulated via the frame matrix,
2644 window and frame matrix must of course agree where to find the
2645 glyphs for their rows. Possible manipulations that must be
2646 mirrored are assignments of rows of the desired frame matrix to the
2647 current frame matrix and scrolling the current frame matrix. */
2649 /* Build frame F's desired matrix from window matrices. Only windows
2650 which have the flag must_be_updated_p set have to be updated. Menu
2651 bar lines of a frame are not covered by window matrices, so make
2652 sure not to touch them in this function. */
2655 build_frame_matrix (f
)
2660 /* F must have a frame matrix when this function is called. */
2661 xassert (!FRAME_WINDOW_P (f
));
2663 /* Clear all rows in the frame matrix covered by window matrices.
2664 Menu bar lines are not covered by windows. */
2665 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2666 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2668 /* Build the matrix by walking the window tree. */
2669 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2670 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2674 /* Walk a window tree, building a frame matrix MATRIX from window
2675 matrices. W is the root of a window tree. */
2678 build_frame_matrix_from_window_tree (matrix
, w
)
2679 struct glyph_matrix
*matrix
;
2684 if (!NILP (w
->hchild
))
2685 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2686 else if (!NILP (w
->vchild
))
2687 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2689 build_frame_matrix_from_leaf_window (matrix
, w
);
2691 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2696 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2697 desired frame matrix built. W is a leaf window whose desired or
2698 current matrix is to be added to FRAME_MATRIX. W's flag
2699 must_be_updated_p determines which matrix it contributes to
2700 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2701 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2702 Adding a desired matrix means setting up used counters and such in
2703 frame rows, while adding a current window matrix to FRAME_MATRIX
2704 means copying glyphs. The latter case corresponds to
2705 preserve_other_columns in the old redisplay. */
2708 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2709 struct glyph_matrix
*frame_matrix
;
2712 struct glyph_matrix
*window_matrix
;
2713 int window_y
, frame_y
;
2714 /* If non-zero, a glyph to insert at the right border of W. */
2715 GLYPH right_border_glyph
= 0;
2717 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2718 if (w
->must_be_updated_p
)
2720 window_matrix
= w
->desired_matrix
;
2722 /* Decide whether we want to add a vertical border glyph. */
2723 if (!WINDOW_RIGHTMOST_P (w
))
2725 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2728 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2729 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2732 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2734 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2738 window_matrix
= w
->current_matrix
;
2740 /* For all rows in the window matrix and corresponding rows in the
2743 frame_y
= window_matrix
->matrix_y
;
2744 while (window_y
< window_matrix
->nrows
)
2746 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2747 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2748 int current_row_p
= window_matrix
== w
->current_matrix
;
2750 /* Fill up the frame row with spaces up to the left margin of the
2752 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2754 /* Fill up areas in the window matrix row with spaces. */
2755 fill_up_glyph_row_with_spaces (window_row
);
2757 /* If only part of W's desired matrix has been built, and
2758 window_row wasn't displayed, use the corresponding current
2760 if (window_matrix
== w
->desired_matrix
2761 && !window_row
->enabled_p
)
2763 window_row
= w
->current_matrix
->rows
+ window_y
;
2769 /* Copy window row to frame row. */
2770 bcopy (window_row
->glyphs
[0],
2771 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2772 window_matrix
->matrix_w
* sizeof (struct glyph
));
2776 xassert (window_row
->enabled_p
);
2778 /* Only when a desired row has been displayed, we want
2779 the corresponding frame row to be updated. */
2780 frame_row
->enabled_p
= 1;
2782 /* Maybe insert a vertical border between horizontally adjacent
2784 if (right_border_glyph
)
2786 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2787 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2791 /* Window row window_y must be a slice of frame row
2793 xassert (glyph_row_slice_p (window_row
, frame_row
));
2795 /* If rows are in sync, we don't have to copy glyphs because
2796 frame and window share glyphs. */
2798 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2799 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2803 /* Set number of used glyphs in the frame matrix. Since we fill
2804 up with spaces, and visit leaf windows from left to right it
2805 can be done simply. */
2806 frame_row
->used
[TEXT_AREA
]
2807 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2815 /* Given a user-specified glyph, possibly including a Lisp-level face
2816 ID, return a glyph that has a realized face ID.
2817 This is used for glyphs displayed specially and not part of the text;
2818 for instance, vertical separators, truncation markers, etc. */
2821 spec_glyph_lookup_face (w
, glyph
)
2825 int lface_id
= FAST_GLYPH_FACE (glyph
);
2826 /* Convert the glyph's specified face to a realized (cache) face. */
2829 int face_id
= merge_faces (XFRAME (w
->frame
),
2830 Qt
, lface_id
, DEFAULT_FACE_ID
);
2832 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2837 /* Add spaces to a glyph row ROW in a window matrix.
2839 Each row has the form:
2841 +---------+-----------------------------+------------+
2842 | left | text | right |
2843 +---------+-----------------------------+------------+
2845 Left and right marginal areas are optional. This function adds
2846 spaces to areas so that there are no empty holes between areas.
2847 In other words: If the right area is not empty, the text area
2848 is filled up with spaces up to the right area. If the text area
2849 is not empty, the left area is filled up.
2851 To be called for frame-based redisplay, only. */
2854 fill_up_glyph_row_with_spaces (row
)
2855 struct glyph_row
*row
;
2857 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2858 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2859 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2863 /* Fill area AREA of glyph row ROW with spaces. To be called for
2864 frame-based redisplay only. */
2867 fill_up_glyph_row_area_with_spaces (row
, area
)
2868 struct glyph_row
*row
;
2871 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2873 struct glyph
*end
= row
->glyphs
[area
+ 1];
2874 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2877 *text
++ = space_glyph
;
2878 row
->used
[area
] = text
- row
->glyphs
[area
];
2883 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2884 reached. In frame matrices only one area, TEXT_AREA, is used. */
2887 fill_up_frame_row_with_spaces (row
, upto
)
2888 struct glyph_row
*row
;
2891 int i
= row
->used
[TEXT_AREA
];
2892 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2895 glyph
[i
++] = space_glyph
;
2897 row
->used
[TEXT_AREA
] = i
;
2902 /**********************************************************************
2903 Mirroring operations on frame matrices in window matrices
2904 **********************************************************************/
2906 /* Set frame being updated via frame-based redisplay to F. This
2907 function must be called before updates to make explicit that we are
2908 working on frame matrices or not. */
2911 set_frame_matrix_frame (f
)
2914 frame_matrix_frame
= f
;
2918 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2919 DESIRED_MATRIX is the desired matrix corresponding to
2920 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2921 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2922 frame_matrix_frame is non-null, this indicates that the exchange is
2923 done in frame matrices, and that we have to perform analogous
2924 operations in window matrices of frame_matrix_frame. */
2927 make_current (desired_matrix
, current_matrix
, row
)
2928 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2931 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2932 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2933 int mouse_face_p
= current_row
->mouse_face_p
;
2935 /* Do current_row = desired_row. This exchanges glyph pointers
2936 between both rows, and does a structure assignment otherwise. */
2937 assign_row (current_row
, desired_row
);
2939 /* Enable current_row to mark it as valid. */
2940 current_row
->enabled_p
= 1;
2941 current_row
->mouse_face_p
= mouse_face_p
;
2943 /* If we are called on frame matrices, perform analogous operations
2944 for window matrices. */
2945 if (frame_matrix_frame
)
2946 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2950 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2951 W's frame which has been made current (by swapping pointers between
2952 current and desired matrix). Perform analogous operations in the
2953 matrices of leaf windows in the window tree rooted at W. */
2956 mirror_make_current (w
, frame_row
)
2962 if (!NILP (w
->hchild
))
2963 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2964 else if (!NILP (w
->vchild
))
2965 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2968 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2969 here because the checks performed in debug mode there
2970 will not allow the conversion. */
2971 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2973 /* If FRAME_ROW is within W, assign the desired row to the
2974 current row (exchanging glyph pointers). */
2975 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2977 struct glyph_row
*current_row
2978 = MATRIX_ROW (w
->current_matrix
, row
);
2979 struct glyph_row
*desired_row
2980 = MATRIX_ROW (w
->desired_matrix
, row
);
2982 if (desired_row
->enabled_p
)
2983 assign_row (current_row
, desired_row
);
2985 swap_glyph_pointers (desired_row
, current_row
);
2986 current_row
->enabled_p
= 1;
2990 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2995 /* Perform row dance after scrolling. We are working on the range of
2996 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2997 including) in MATRIX. COPY_FROM is a vector containing, for each
2998 row I in the range 0 <= I < NLINES, the index of the original line
2999 to move to I. This index is relative to the row range, i.e. 0 <=
3000 index < NLINES. RETAINED_P is a vector containing zero for each
3001 row 0 <= I < NLINES which is empty.
3003 This function is called from do_scrolling and do_direct_scrolling. */
3006 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3008 struct glyph_matrix
*matrix
;
3009 int unchanged_at_top
, nlines
;
3013 /* A copy of original rows. */
3014 struct glyph_row
*old_rows
;
3016 /* Rows to assign to. */
3017 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3021 /* Make a copy of the original rows. */
3022 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3023 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3025 /* Assign new rows, maybe clear lines. */
3026 for (i
= 0; i
< nlines
; ++i
)
3028 int enabled_before_p
= new_rows
[i
].enabled_p
;
3030 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3031 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3032 new_rows
[i
] = old_rows
[copy_from
[i
]];
3033 new_rows
[i
].enabled_p
= enabled_before_p
;
3035 /* RETAINED_P is zero for empty lines. */
3036 if (!retained_p
[copy_from
[i
]])
3037 new_rows
[i
].enabled_p
= 0;
3040 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3041 if (frame_matrix_frame
)
3042 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3043 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3047 /* Synchronize glyph pointers in the current matrix of window W with
3048 the current frame matrix. */
3051 sync_window_with_frame_matrix_rows (w
)
3054 struct frame
*f
= XFRAME (w
->frame
);
3055 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3056 int left
, right
, x
, width
;
3058 /* Preconditions: W must be a leaf window on a tty frame. */
3059 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3060 xassert (!FRAME_WINDOW_P (f
));
3062 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3063 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3064 x
= w
->current_matrix
->matrix_x
;
3065 width
= w
->current_matrix
->matrix_w
;
3067 window_row
= w
->current_matrix
->rows
;
3068 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3069 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3071 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3073 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3074 = frame_row
->glyphs
[0] + x
;
3075 window_row
->glyphs
[TEXT_AREA
]
3076 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3077 window_row
->glyphs
[LAST_AREA
]
3078 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3079 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3080 = window_row
->glyphs
[LAST_AREA
] - right
;
3085 /* Return the window in the window tree rooted in W containing frame
3086 row ROW. Value is null if none is found. */
3089 frame_row_to_window (w
, row
)
3093 struct window
*found
= NULL
;
3097 if (!NILP (w
->hchild
))
3098 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3099 else if (!NILP (w
->vchild
))
3100 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3101 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3102 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3105 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3112 /* Perform a line dance in the window tree rooted at W, after
3113 scrolling a frame matrix in mirrored_line_dance.
3115 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3116 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3117 COPY_FROM is a vector containing, for each row I in the range 0 <=
3118 I < NLINES, the index of the original line to move to I. This
3119 index is relative to the row range, i.e. 0 <= index < NLINES.
3120 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3124 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3126 int unchanged_at_top
, nlines
;
3132 if (!NILP (w
->hchild
))
3133 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3134 nlines
, copy_from
, retained_p
);
3135 else if (!NILP (w
->vchild
))
3136 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3137 nlines
, copy_from
, retained_p
);
3140 /* W is a leaf window, and we are working on its current
3142 struct glyph_matrix
*m
= w
->current_matrix
;
3144 struct glyph_row
*old_rows
;
3146 /* Make a copy of the original rows of matrix m. */
3147 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3148 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3150 for (i
= 0; i
< nlines
; ++i
)
3152 /* Frame relative line assigned to. */
3153 int frame_to
= i
+ unchanged_at_top
;
3155 /* Frame relative line assigned. */
3156 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3158 /* Window relative line assigned to. */
3159 int window_to
= frame_to
- m
->matrix_y
;
3161 /* Window relative line assigned. */
3162 int window_from
= frame_from
- m
->matrix_y
;
3164 /* Is assigned line inside window? */
3165 int from_inside_window_p
3166 = window_from
>= 0 && window_from
< m
->matrix_h
;
3168 /* Is assigned to line inside window? */
3169 int to_inside_window_p
3170 = window_to
>= 0 && window_to
< m
->matrix_h
;
3172 if (from_inside_window_p
&& to_inside_window_p
)
3174 /* Enabled setting before assignment. */
3175 int enabled_before_p
;
3177 /* Do the assignment. The enabled_p flag is saved
3178 over the assignment because the old redisplay did
3180 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3181 m
->rows
[window_to
] = old_rows
[window_from
];
3182 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3184 /* If frame line is empty, window line is empty, too. */
3185 if (!retained_p
[copy_from
[i
]])
3186 m
->rows
[window_to
].enabled_p
= 0;
3188 else if (to_inside_window_p
)
3190 /* A copy between windows. This is an infrequent
3191 case not worth optimizing. */
3192 struct frame
*f
= XFRAME (w
->frame
);
3193 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3195 struct glyph_matrix
*m2
;
3198 w2
= frame_row_to_window (root
, frame_from
);
3199 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3200 -nw', FROM_FRAME sometimes has no associated window.
3201 This check avoids a segfault if W2 is null. */
3204 m2
= w2
->current_matrix
;
3205 m2_from
= frame_from
- m2
->matrix_y
;
3206 copy_row_except_pointers (m
->rows
+ window_to
,
3207 m2
->rows
+ m2_from
);
3209 /* If frame line is empty, window line is empty, too. */
3210 if (!retained_p
[copy_from
[i
]])
3211 m
->rows
[window_to
].enabled_p
= 0;
3215 else if (from_inside_window_p
)
3219 /* If there was a copy between windows, make sure glyph
3220 pointers are in sync with the frame matrix. */
3222 sync_window_with_frame_matrix_rows (w
);
3224 /* Check that no pointers are lost. */
3228 /* Next window on same level. */
3229 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3236 /* Check that window and frame matrices agree about their
3237 understanding where glyphs of the rows are to find. For each
3238 window in the window tree rooted at W, check that rows in the
3239 matrices of leaf window agree with their frame matrices about
3243 check_window_matrix_pointers (w
)
3248 if (!NILP (w
->hchild
))
3249 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3250 else if (!NILP (w
->vchild
))
3251 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3254 struct frame
*f
= XFRAME (w
->frame
);
3255 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3256 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3259 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3264 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3265 a window and FRAME_MATRIX is the corresponding frame matrix. For
3266 each row in WINDOW_MATRIX check that it's a slice of the
3267 corresponding frame row. If it isn't, abort. */
3270 check_matrix_pointers (window_matrix
, frame_matrix
)
3271 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3273 /* Row number in WINDOW_MATRIX. */
3276 /* Row number corresponding to I in FRAME_MATRIX. */
3277 int j
= window_matrix
->matrix_y
;
3279 /* For all rows check that the row in the window matrix is a
3280 slice of the row in the frame matrix. If it isn't we didn't
3281 mirror an operation on the frame matrix correctly. */
3282 while (i
< window_matrix
->nrows
)
3284 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3285 frame_matrix
->rows
+ j
))
3291 #endif /* GLYPH_DEBUG != 0 */
3295 /**********************************************************************
3296 VPOS and HPOS translations
3297 **********************************************************************/
3301 /* Translate vertical position VPOS which is relative to window W to a
3302 vertical position relative to W's frame. */
3305 window_to_frame_vpos (w
, vpos
)
3309 struct frame
*f
= XFRAME (w
->frame
);
3311 xassert (!FRAME_WINDOW_P (f
));
3312 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3313 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3314 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3319 /* Translate horizontal position HPOS which is relative to window W to
3320 a horizontal position relative to W's frame. */
3323 window_to_frame_hpos (w
, hpos
)
3327 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3328 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3332 #endif /* GLYPH_DEBUG */
3336 /**********************************************************************
3338 **********************************************************************/
3340 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3341 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3347 CHECK_LIVE_FRAME (frame
);
3350 /* Ignore redraw requests, if frame has no glyphs yet.
3351 (Implementation note: It still has to be checked why we are
3352 called so early here). */
3353 if (!glyphs_initialized_initially_p
)
3357 if (FRAME_MSDOS_P (f
))
3358 set_terminal_modes ();
3360 clear_current_matrices (f
);
3363 windows_or_buffers_changed
++;
3364 /* Mark all windows as inaccurate, so that every window will have
3365 its redisplay done. */
3366 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3367 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3373 /* Redraw frame F. This is nothing more than a call to the Lisp
3374 function redraw-frame. */
3381 XSETFRAME (frame
, f
);
3382 Fredraw_frame (frame
);
3386 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3387 doc
: /* Clear and redisplay all visible frames. */)
3390 Lisp_Object tail
, frame
;
3392 FOR_EACH_FRAME (tail
, frame
)
3393 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3394 Fredraw_frame (frame
);
3400 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3401 visible frames marked as garbaged. */
3404 redraw_garbaged_frames ()
3406 Lisp_Object tail
, frame
;
3408 FOR_EACH_FRAME (tail
, frame
)
3409 if (FRAME_VISIBLE_P (XFRAME (frame
))
3410 && FRAME_GARBAGED_P (XFRAME (frame
)))
3411 Fredraw_frame (frame
);
3416 /***********************************************************************
3418 ***********************************************************************/
3420 /* Try to update display and current glyph matrix directly.
3422 This function is called after a character G has been inserted into
3423 current_buffer. It tries to update the current glyph matrix and
3424 perform appropriate screen output to reflect the insertion. If it
3425 succeeds, the global flag redisplay_performed_directly_p will be
3426 set to 1, and thereby prevent the more costly general redisplay
3427 from running (see redisplay_internal).
3429 This function is not called for `hairy' character insertions.
3430 In particular, it is not called when after or before change
3431 functions exist, like they are used by font-lock. See keyboard.c
3432 for details where this function is called. */
3435 direct_output_for_insert (g
)
3438 register struct frame
*f
= SELECTED_FRAME ();
3439 struct window
*w
= XWINDOW (selected_window
);
3441 struct glyph_row
*glyph_row
;
3442 struct glyph
*glyphs
, *glyph
, *end
;
3444 /* Non-null means that redisplay of W is based on window matrices. */
3445 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3446 /* Non-null means we are in overwrite mode. */
3447 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3449 struct text_pos pos
;
3450 int delta
, delta_bytes
;
3452 /* Not done directly. */
3453 redisplay_performed_directly_p
= 0;
3455 /* Quickly give up for some common cases. */
3456 if (cursor_in_echo_area
3457 /* Give up if fonts have changed. */
3459 /* Give up if face attributes have been changed. */
3460 || face_change_count
3461 /* Give up if cursor position not really known. */
3462 || !display_completed
3463 /* Give up if buffer appears in two places. */
3464 || buffer_shared
> 1
3465 /* Give up if currently displaying a message instead of the
3466 minibuffer contents. */
3467 || (EQ (selected_window
, minibuf_window
)
3468 && EQ (minibuf_window
, echo_area_window
))
3469 /* Give up for hscrolled mini-buffer because display of the prompt
3470 is handled specially there (see display_line). */
3471 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3472 /* Give up if overwriting in the middle of a line. */
3475 && FETCH_BYTE (PT
) != '\n')
3476 /* Give up for tabs and line ends. */
3480 /* Give up if unable to display the cursor in the window. */
3481 || w
->cursor
.vpos
< 0
3482 /* Give up if we are showing a message or just cleared the message
3483 because we might need to resize the echo area window. */
3484 || !NILP (echo_area_buffer
[0])
3485 || !NILP (echo_area_buffer
[1])
3486 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3487 /* Can't do it in a continued line because continuation
3488 lines would change. */
3489 (glyph_row
->continued_p
3490 || glyph_row
->exact_window_width_line_p
3491 /* Can't use this method if the line overlaps others or is
3492 overlapped by others because these other lines would
3493 have to be redisplayed. */
3494 || glyph_row
->overlapping_p
3495 || glyph_row
->overlapped_p
))
3496 /* Can't do it for partial width windows on terminal frames
3497 because we can't clear to eol in such a window. */
3498 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3501 /* If we can't insert glyphs, we can use this method only
3502 at the end of a line. */
3503 if (!char_ins_del_ok
)
3504 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3507 /* Set up a display iterator structure for W. Glyphs will be
3508 produced in scratch_glyph_row. Current position is W's cursor
3510 clear_glyph_row (&scratch_glyph_row
);
3511 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3512 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3513 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3516 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3517 if (glyph_row
->mouse_face_p
)
3520 /* Give up if highlighting trailing whitespace and we have trailing
3521 whitespace in glyph_row. We would have to remove the trailing
3522 whitespace face in that case. */
3523 if (!NILP (Vshow_trailing_whitespace
)
3524 && glyph_row
->used
[TEXT_AREA
])
3528 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3529 if (last
->type
== STRETCH_GLYPH
3530 || (last
->type
== CHAR_GLYPH
3531 && last
->u
.ch
== ' '))
3535 /* Give up if there are overlay strings at pos. This would fail
3536 if the overlay string has newlines in it. */
3537 if (STRINGP (it
.string
))
3540 it
.hpos
= w
->cursor
.hpos
;
3541 it
.vpos
= w
->cursor
.vpos
;
3542 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3543 it
.current_y
= w
->cursor
.y
;
3544 it
.end_charpos
= PT
;
3545 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3546 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3548 /* More than one display element may be returned for PT - 1 if
3549 (i) it's a control character which is translated into `\003' or
3550 `^C', or (ii) it has a display table entry, or (iii) it's a
3551 combination of both. */
3552 delta
= delta_bytes
= 0;
3553 while (get_next_display_element (&it
))
3555 PRODUCE_GLYPHS (&it
);
3557 /* Give up if glyph doesn't fit completely on the line. */
3558 if (it
.current_x
>= it
.last_visible_x
)
3561 /* Give up if new glyph has different ascent or descent than
3562 the original row, or if it is not a character glyph. */
3563 if (glyph_row
->ascent
!= it
.ascent
3564 || glyph_row
->height
!= it
.ascent
+ it
.descent
3565 || glyph_row
->phys_ascent
!= it
.phys_ascent
3566 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3567 || it
.what
!= IT_CHARACTER
)
3571 delta_bytes
+= it
.len
;
3572 set_iterator_to_next (&it
, 1);
3575 /* Give up if we hit the right edge of the window. We would have
3576 to insert truncation or continuation glyphs. */
3577 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3578 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3581 /* Give up if there is a \t following in the line. */
3583 it2
.end_charpos
= ZV
;
3584 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3585 while (get_next_display_element (&it2
)
3586 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3590 set_iterator_to_next (&it2
, 1);
3593 /* Number of new glyphs produced. */
3594 n
= it
.glyph_row
->used
[TEXT_AREA
];
3596 /* Start and end of glyphs in original row. */
3597 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3598 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3600 /* Make room for new glyphs, then insert them. */
3601 xassert (end
- glyphs
- n
>= 0);
3602 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3603 (end
- glyphs
- n
) * sizeof (*end
));
3604 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3605 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3606 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3608 /* Compute new line width. */
3609 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3610 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3611 glyph_row
->pixel_width
= glyph_row
->x
;
3614 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3618 /* Increment buffer positions for glyphs following the newly
3620 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3621 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3622 glyph
->charpos
+= delta
;
3624 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3626 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3627 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3630 /* Adjust positions in lines following the one we are in. */
3631 increment_matrix_positions (w
->current_matrix
,
3633 w
->current_matrix
->nrows
,
3634 delta
, delta_bytes
);
3636 glyph_row
->contains_overlapping_glyphs_p
3637 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3639 glyph_row
->displays_text_p
= 1;
3640 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3641 XFASTINT (w
->window_end_vpos
)));
3643 if (!NILP (Vshow_trailing_whitespace
))
3644 highlight_trailing_whitespace (it
.f
, glyph_row
);
3646 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3647 In the middle, we have to insert glyphs. Note that this is now
3648 implemented for X frames. The implementation uses updated_window
3650 updated_row
= glyph_row
;
3651 updated_area
= TEXT_AREA
;
3655 rif
->update_window_begin_hook (w
);
3657 if (glyphs
== end
- n
3658 /* In front of a space added by append_space. */
3659 || (glyphs
== end
- n
- 1
3660 && (end
- n
)->charpos
<= 0))
3661 rif
->write_glyphs (glyphs
, n
);
3663 rif
->insert_glyphs (glyphs
, n
);
3667 if (glyphs
== end
- n
)
3668 write_glyphs (glyphs
, n
);
3670 insert_glyphs (glyphs
, n
);
3673 w
->cursor
.hpos
+= n
;
3674 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3675 xassert (w
->cursor
.hpos
>= 0
3676 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3678 /* How to set the cursor differs depending on whether we are
3679 using a frame matrix or a window matrix. Note that when
3680 a frame matrix is used, cursor_to expects frame coordinates,
3681 and the X and Y parameters are not used. */
3682 if (window_redisplay_p
)
3683 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3684 w
->cursor
.y
, w
->cursor
.x
);
3688 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3689 + (INTEGERP (w
->left_margin_cols
)
3690 ? XFASTINT (w
->left_margin_cols
)
3692 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3696 #ifdef HAVE_WINDOW_SYSTEM
3697 update_window_fringes (w
, 0);
3701 rif
->update_window_end_hook (w
, 1, 0);
3706 TRACE ((stderr
, "direct output for insert\n"));
3707 mark_window_display_accurate (it
.window
, 1);
3708 redisplay_performed_directly_p
= 1;
3713 /* Perform a direct display update for moving PT by N positions
3714 left or right. N < 0 means a movement backwards. This function
3715 is currently only called for N == 1 or N == -1. */
3718 direct_output_forward_char (n
)
3721 struct frame
*f
= SELECTED_FRAME ();
3722 struct window
*w
= XWINDOW (selected_window
);
3723 struct glyph_row
*row
;
3725 /* Give up if point moved out of or into a composition. */
3726 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3727 current_buffer
, PT
))
3730 /* Give up if face attributes have been changed. */
3731 if (face_change_count
)
3734 /* Give up if current matrix is not up to date or we are
3735 displaying a message. */
3736 if (!display_completed
|| cursor_in_echo_area
)
3739 /* Give up if the buffer's direction is reversed. */
3740 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3743 /* Can't use direct output if highlighting a region. */
3744 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3747 /* Can't use direct output if highlighting trailing whitespace. */
3748 if (!NILP (Vshow_trailing_whitespace
))
3751 /* Give up if we are showing a message or just cleared the message
3752 because we might need to resize the echo area window. */
3753 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3756 /* Give up if currently displaying a message instead of the
3757 minibuffer contents. */
3758 if (XWINDOW (minibuf_window
) == w
3759 && EQ (minibuf_window
, echo_area_window
))
3762 /* Give up if we don't know where the cursor is. */
3763 if (w
->cursor
.vpos
< 0)
3766 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3768 /* Give up if PT is outside of the last known cursor row. */
3769 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3770 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3773 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3775 w
->last_cursor
= w
->cursor
;
3776 XSETFASTINT (w
->last_point
, PT
);
3778 xassert (w
->cursor
.hpos
>= 0
3779 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3781 if (FRAME_WINDOW_P (f
))
3782 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3783 w
->cursor
.y
, w
->cursor
.x
);
3787 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3788 + (INTEGERP (w
->left_margin_cols
)
3789 ? XFASTINT (w
->left_margin_cols
)
3791 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3796 redisplay_performed_directly_p
= 1;
3802 /***********************************************************************
3804 ***********************************************************************/
3806 /* Update frame F based on the data in desired matrices.
3808 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3809 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3812 Value is non-zero if redisplay was stopped due to pending input. */
3815 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3818 int inhibit_hairy_id_p
;
3820 /* 1 means display has been paused because of pending input. */
3822 struct window
*root_window
= XWINDOW (f
->root_window
);
3824 if (FRAME_WINDOW_P (f
))
3826 /* We are working on window matrix basis. All windows whose
3827 flag must_be_updated_p is set have to be updated. */
3829 /* Record that we are not working on frame matrices. */
3830 set_frame_matrix_frame (NULL
);
3832 /* Update all windows in the window tree of F, maybe stopping
3833 when pending input is detected. */
3836 /* Update the menu bar on X frames that don't have toolkit
3838 if (WINDOWP (f
->menu_bar_window
))
3839 update_window (XWINDOW (f
->menu_bar_window
), 1);
3841 /* Update the tool-bar window, if present. */
3842 if (WINDOWP (f
->tool_bar_window
))
3844 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3846 /* Update tool-bar window. */
3847 if (w
->must_be_updated_p
)
3851 update_window (w
, 1);
3852 w
->must_be_updated_p
= 0;
3854 /* Swap tool-bar strings. We swap because we want to
3856 tem
= f
->current_tool_bar_string
;
3857 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3858 f
->desired_tool_bar_string
= tem
;
3863 /* Update windows. */
3864 paused_p
= update_window_tree (root_window
, force_p
);
3867 /* This flush is a performance bottleneck under X,
3868 and it doesn't seem to be necessary anyway (in general).
3869 It is necessary when resizing the window with the mouse, or
3870 at least the fringes are not redrawn in a timely manner. ++kfs */
3871 if (f
->force_flush_display_p
)
3873 rif
->flush_display (f
);
3874 f
->force_flush_display_p
= 0;
3879 /* We are working on frame matrix basis. Set the frame on whose
3880 frame matrix we operate. */
3881 set_frame_matrix_frame (f
);
3883 /* Build F's desired matrix from window matrices. */
3884 build_frame_matrix (f
);
3886 /* Update the display */
3888 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3892 fflush (termscript
);
3895 /* Check window matrices for lost pointers. */
3897 check_window_matrix_pointers (root_window
);
3898 add_frame_display_history (f
, paused_p
);
3902 /* Reset flags indicating that a window should be updated. */
3903 set_window_update_flags (root_window
, 0);
3905 display_completed
= !paused_p
;
3911 /************************************************************************
3912 Window-based updates
3913 ************************************************************************/
3915 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3916 don't stop updating when input is pending. */
3919 update_window_tree (w
, force_p
)
3925 while (w
&& !paused_p
)
3927 if (!NILP (w
->hchild
))
3928 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3929 else if (!NILP (w
->vchild
))
3930 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3931 else if (w
->must_be_updated_p
)
3932 paused_p
|= update_window (w
, force_p
);
3934 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3941 /* Update window W if its flag must_be_updated_p is non-zero. If
3942 FORCE_P is non-zero, don't stop updating if input is pending. */
3945 update_single_window (w
, force_p
)
3949 if (w
->must_be_updated_p
)
3951 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3953 /* Record that this is not a frame-based redisplay. */
3954 set_frame_matrix_frame (NULL
);
3958 update_window (w
, force_p
);
3961 /* Reset flag in W. */
3962 w
->must_be_updated_p
= 0;
3966 #ifdef HAVE_WINDOW_SYSTEM
3968 /* Redraw lines from the current matrix of window W that are
3969 overlapped by other rows. YB is bottom-most y-position in W. */
3972 redraw_overlapped_rows (w
, yb
)
3978 /* If rows overlapping others have been changed, the rows being
3979 overlapped have to be redrawn. This won't draw lines that have
3980 already been drawn in update_window_line because overlapped_p in
3981 desired rows is 0, so after row assignment overlapped_p in
3982 current rows is 0. */
3983 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3985 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3987 if (!row
->enabled_p
)
3989 else if (row
->mode_line_p
)
3992 if (row
->overlapped_p
)
3994 enum glyph_row_area area
;
3996 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3999 updated_area
= area
;
4000 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
4001 if (row
->used
[area
])
4002 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
4003 rif
->clear_end_of_line (-1);
4006 row
->overlapped_p
= 0;
4009 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4015 /* Redraw lines from the current matrix of window W that overlap
4016 others. YB is bottom-most y-position in W. */
4019 redraw_overlapping_rows (w
, yb
)
4024 struct glyph_row
*row
;
4026 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4028 row
= w
->current_matrix
->rows
+ i
;
4030 if (!row
->enabled_p
)
4032 else if (row
->mode_line_p
)
4035 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4037 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4041 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4042 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4043 overlaps
|= OVERLAPS_PRED
;
4044 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4045 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4046 overlaps
|= OVERLAPS_SUCC
;
4050 if (row
->used
[LEFT_MARGIN_AREA
])
4051 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4053 if (row
->used
[TEXT_AREA
])
4054 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4056 if (row
->used
[RIGHT_MARGIN_AREA
])
4057 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4059 /* Record in neighbour rows that ROW overwrites part of
4061 if (overlaps
& OVERLAPS_PRED
)
4062 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4063 if (overlaps
& OVERLAPS_SUCC
)
4064 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4073 #endif /* HAVE_WINDOW_SYSTEM */
4078 /* Check that no row in the current matrix of window W is enabled
4079 which is below what's displayed in the window. */
4082 check_current_matrix_flags (w
)
4085 int last_seen_p
= 0;
4086 int i
, yb
= window_text_bottom_y (w
);
4088 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4090 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4091 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4093 else if (last_seen_p
&& row
->enabled_p
)
4098 #endif /* GLYPH_DEBUG */
4101 /* Update display of window W. FORCE_P non-zero means that we should
4102 not stop when detecting pending input. */
4105 update_window (w
, force_p
)
4109 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4111 int preempt_count
= baud_rate
/ 2400 + 1;
4112 extern int input_pending
;
4113 extern Lisp_Object do_mouse_tracking
;
4115 /* Check that W's frame doesn't have glyph matrices. */
4116 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4117 xassert (updating_frame
!= NULL
);
4120 /* Check pending input the first time so that we can quickly return. */
4121 if (redisplay_dont_pause
)
4124 detect_input_pending_ignore_squeezables ();
4126 /* If forced to complete the update, or if no input is pending, do
4128 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4130 struct glyph_row
*row
, *end
;
4131 struct glyph_row
*mode_line_row
;
4132 struct glyph_row
*header_line_row
;
4133 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4135 rif
->update_window_begin_hook (w
);
4136 yb
= window_text_bottom_y (w
);
4138 /* If window has a header line, update it before everything else.
4139 Adjust y-positions of other rows by the header line height. */
4140 row
= desired_matrix
->rows
;
4141 end
= row
+ desired_matrix
->nrows
- 1;
4143 if (row
->mode_line_p
)
4145 header_line_row
= row
;
4149 header_line_row
= NULL
;
4151 /* Update the mode line, if necessary. */
4152 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4153 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4155 mode_line_row
->y
= yb
;
4156 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4158 &mouse_face_overwritten_p
);
4162 /* Find first enabled row. Optimizations in redisplay_internal
4163 may lead to an update with only one row enabled. There may
4164 be also completely empty matrices. */
4165 while (row
< end
&& !row
->enabled_p
)
4168 /* Try reusing part of the display by copying. */
4169 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4171 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4174 /* All rows were found to be equal. */
4180 /* We've scrolled the display. */
4186 /* Update the rest of the lines. */
4187 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4190 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4193 /* We'll have to play a little bit with when to
4194 detect_input_pending. If it's done too often,
4195 scrolling large windows with repeated scroll-up
4196 commands will too quickly pause redisplay. */
4197 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4198 detect_input_pending_ignore_squeezables ();
4200 changed_p
|= update_window_line (w
, vpos
,
4201 &mouse_face_overwritten_p
);
4203 /* Mark all rows below the last visible one in the current
4204 matrix as invalid. This is necessary because of
4205 variable line heights. Consider the case of three
4206 successive redisplays, where the first displays 5
4207 lines, the second 3 lines, and the third 5 lines again.
4208 If the second redisplay wouldn't mark rows in the
4209 current matrix invalid, the third redisplay might be
4210 tempted to optimize redisplay based on lines displayed
4211 in the first redisplay. */
4212 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4213 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4214 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4217 /* Was display preempted? */
4218 paused_p
= row
< end
;
4222 /* Update the header line after scrolling because a new header
4223 line would otherwise overwrite lines at the top of the window
4224 that can be scrolled. */
4225 if (header_line_row
&& header_line_row
->enabled_p
)
4227 header_line_row
->y
= 0;
4228 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4232 /* Fix the appearance of overlapping/overlapped rows. */
4233 if (!paused_p
&& !w
->pseudo_window_p
)
4235 #ifdef HAVE_WINDOW_SYSTEM
4236 if (changed_p
&& rif
->fix_overlapping_area
)
4238 redraw_overlapped_rows (w
, yb
);
4239 redraw_overlapping_rows (w
, yb
);
4243 /* Make cursor visible at cursor position of W. */
4244 set_window_cursor_after_update (w
);
4246 #if 0 /* Check that current matrix invariants are satisfied. This is
4247 for debugging only. See the comment of check_matrix_invariants. */
4248 IF_DEBUG (check_matrix_invariants (w
));
4253 /* Remember the redisplay method used to display the matrix. */
4254 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4257 #ifdef HAVE_WINDOW_SYSTEM
4258 update_window_fringes (w
, 0);
4261 /* End the update of window W. Don't set the cursor if we
4262 paused updating the display because in this case,
4263 set_window_cursor_after_update hasn't been called, and
4264 output_cursor doesn't contain the cursor location. */
4265 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4271 /* check_current_matrix_flags (w); */
4272 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4275 clear_glyph_matrix (desired_matrix
);
4281 /* Update the display of area AREA in window W, row number VPOS.
4282 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4285 update_marginal_area (w
, area
, vpos
)
4289 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4291 /* Let functions in xterm.c know what area subsequent X positions
4292 will be relative to. */
4293 updated_area
= area
;
4295 /* Set cursor to start of glyphs, write them, and clear to the end
4296 of the area. I don't think that something more sophisticated is
4297 necessary here, since marginal areas will not be the default. */
4298 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4299 if (desired_row
->used
[area
])
4300 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4301 rif
->clear_end_of_line (-1);
4305 /* Update the display of the text area of row VPOS in window W.
4306 Value is non-zero if display has changed. */
4309 update_text_area (w
, vpos
)
4313 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4314 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4317 /* Let functions in xterm.c know what area subsequent X positions
4318 will be relative to. */
4319 updated_area
= TEXT_AREA
;
4321 /* If rows are at different X or Y, or rows have different height,
4322 or the current row is marked invalid, write the entire line. */
4323 if (!current_row
->enabled_p
4324 || desired_row
->y
!= current_row
->y
4325 || desired_row
->ascent
!= current_row
->ascent
4326 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4327 || desired_row
->phys_height
!= current_row
->phys_height
4328 || desired_row
->visible_height
!= current_row
->visible_height
4329 || current_row
->overlapped_p
4330 || current_row
->mouse_face_p
4331 || current_row
->x
!= desired_row
->x
)
4333 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4335 if (desired_row
->used
[TEXT_AREA
])
4336 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4337 desired_row
->used
[TEXT_AREA
]);
4339 /* Clear to end of window. */
4340 rif
->clear_end_of_line (-1);
4343 /* This erases the cursor. We do this here because
4344 notice_overwritten_cursor cannot easily check this, which
4345 might indicate that the whole functionality of
4346 notice_overwritten_cursor would better be implemented here.
4347 On the other hand, we need notice_overwritten_cursor as long
4348 as mouse highlighting is done asynchronously outside of
4350 if (vpos
== w
->phys_cursor
.vpos
)
4351 w
->phys_cursor_on_p
= 0;
4356 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4357 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4358 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4359 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4361 /* If the desired row extends its face to the text area end, and
4362 unless the current row also does so at the same position,
4363 make sure we write at least one glyph, so that the face
4364 extension actually takes place. */
4365 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4366 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4367 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4368 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4371 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4375 /* Loop over glyphs that current and desired row may have
4381 /* Skip over glyphs that both rows have in common. These
4382 don't have to be written. We can't skip if the last
4383 current glyph overlaps the glyph to its right. For
4384 example, consider a current row of `if ' with the `f' in
4385 Courier bold so that it overlaps the ` ' to its right.
4386 If the desired row is ` ', we would skip over the space
4387 after the `if' and there would remain a pixel from the
4388 `f' on the screen. */
4389 if (overlapping_glyphs_p
&& i
> 0)
4391 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4394 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4396 can_skip_p
= right
== 0;
4402 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4404 x
+= desired_glyph
->pixel_width
;
4405 ++desired_glyph
, ++current_glyph
, ++i
;
4408 /* Consider the case that the current row contains "xxx
4409 ppp ggg" in italic Courier font, and the desired row
4410 is "xxx ggg". The character `p' has lbearing, `g'
4411 has not. The loop above will stop in front of the
4412 first `p' in the current row. If we would start
4413 writing glyphs there, we wouldn't erase the lbearing
4414 of the `p'. The rest of the lbearing problem is then
4415 taken care of by draw_glyphs. */
4416 if (overlapping_glyphs_p
4418 && i
< current_row
->used
[TEXT_AREA
]
4419 && (current_row
->used
[TEXT_AREA
]
4420 != desired_row
->used
[TEXT_AREA
]))
4424 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4426 while (left
> 0 && i
> 0)
4428 --i
, --desired_glyph
, --current_glyph
;
4429 x
-= desired_glyph
->pixel_width
;
4430 left
-= desired_glyph
->pixel_width
;
4435 /* Try to avoid writing the entire rest of the desired row
4436 by looking for a resync point. This mainly prevents
4437 mode line flickering in the case the mode line is in
4438 fixed-pitch font, which it usually will be. */
4439 if (i
< desired_row
->used
[TEXT_AREA
])
4441 int start_x
= x
, start_hpos
= i
;
4442 struct glyph
*start
= desired_glyph
;
4444 int skip_first_p
= !can_skip_p
;
4446 /* Find the next glyph that's equal again. */
4449 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4452 x
+= desired_glyph
->pixel_width
;
4453 current_x
+= current_glyph
->pixel_width
;
4454 ++desired_glyph
, ++current_glyph
, ++i
;
4458 if (i
== start_hpos
|| x
!= current_x
)
4462 desired_glyph
= start
;
4466 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4467 rif
->write_glyphs (start
, i
- start_hpos
);
4472 /* Write the rest. */
4473 if (i
< desired_row
->used
[TEXT_AREA
])
4475 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4476 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4480 /* Maybe clear to end of line. */
4481 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4483 /* If new row extends to the end of the text area, nothing
4484 has to be cleared, if and only if we did a write_glyphs
4485 above. This is made sure by setting desired_stop_pos
4486 appropriately above. */
4487 xassert (i
< desired_row
->used
[TEXT_AREA
]
4488 || ((desired_row
->used
[TEXT_AREA
]
4489 == current_row
->used
[TEXT_AREA
])
4490 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4492 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4494 /* If old row extends to the end of the text area, clear. */
4495 if (i
>= desired_row
->used
[TEXT_AREA
])
4496 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4497 desired_row
->pixel_width
);
4498 rif
->clear_end_of_line (-1);
4501 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4503 /* Otherwise clear to the end of the old row. Everything
4504 after that position should be clear already. */
4507 if (i
>= desired_row
->used
[TEXT_AREA
])
4508 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4509 desired_row
->pixel_width
);
4511 /* If cursor is displayed at the end of the line, make sure
4512 it's cleared. Nowadays we don't have a phys_cursor_glyph
4513 with which to erase the cursor (because this method
4514 doesn't work with lbearing/rbearing), so we must do it
4516 if (vpos
== w
->phys_cursor
.vpos
4517 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4519 w
->phys_cursor_on_p
= 0;
4523 x
= current_row
->pixel_width
;
4524 rif
->clear_end_of_line (x
);
4533 /* Update row VPOS in window W. Value is non-zero if display has been
4537 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4539 int vpos
, *mouse_face_overwritten_p
;
4541 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4542 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4545 /* Set the row being updated. This is important to let xterm.c
4546 know what line height values are in effect. */
4547 updated_row
= desired_row
;
4549 /* A row can be completely invisible in case a desired matrix was
4550 built with a vscroll and then make_cursor_line_fully_visible shifts
4551 the matrix. Make sure to make such rows current anyway, since
4552 we need the correct y-position, for example, in the current matrix. */
4553 if (desired_row
->mode_line_p
4554 || desired_row
->visible_height
> 0)
4556 xassert (desired_row
->enabled_p
);
4558 /* Update display of the left margin area, if there is one. */
4559 if (!desired_row
->full_width_p
4560 && !NILP (w
->left_margin_cols
))
4563 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4566 /* Update the display of the text area. */
4567 if (update_text_area (w
, vpos
))
4570 if (current_row
->mouse_face_p
)
4571 *mouse_face_overwritten_p
= 1;
4574 /* Update display of the right margin area, if there is one. */
4575 if (!desired_row
->full_width_p
4576 && !NILP (w
->right_margin_cols
))
4579 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4582 /* Draw truncation marks etc. */
4583 if (!current_row
->enabled_p
4584 || desired_row
->y
!= current_row
->y
4585 || desired_row
->visible_height
!= current_row
->visible_height
4586 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4587 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4588 || current_row
->redraw_fringe_bitmaps_p
4589 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4590 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4591 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4592 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4593 rif
->after_update_window_line_hook (desired_row
);
4596 /* Update current_row from desired_row. */
4597 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4603 /* Set the cursor after an update of window W. This function may only
4604 be called from update_window. */
4607 set_window_cursor_after_update (w
)
4610 struct frame
*f
= XFRAME (w
->frame
);
4611 int cx
, cy
, vpos
, hpos
;
4613 /* Not intended for frame matrix updates. */
4614 xassert (FRAME_WINDOW_P (f
));
4616 if (cursor_in_echo_area
4617 && !NILP (echo_area_buffer
[0])
4618 /* If we are showing a message instead of the mini-buffer,
4619 show the cursor for the message instead. */
4620 && XWINDOW (minibuf_window
) == w
4621 && EQ (minibuf_window
, echo_area_window
)
4622 /* These cases apply only to the frame that contains
4623 the active mini-buffer window. */
4624 && FRAME_HAS_MINIBUF_P (f
)
4625 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4627 cx
= cy
= vpos
= hpos
= 0;
4629 if (cursor_in_echo_area
>= 0)
4631 /* If the mini-buffer is several lines high, find the last
4632 line that has any text on it. Note: either all lines
4633 are enabled or none. Otherwise we wouldn't be able to
4635 struct glyph_row
*row
, *last_row
;
4636 struct glyph
*glyph
;
4637 int yb
= window_text_bottom_y (w
);
4640 row
= w
->current_matrix
->rows
;
4641 while (row
->enabled_p
4642 && (last_row
== NULL
4643 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4645 if (row
->used
[TEXT_AREA
]
4646 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4653 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4654 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4656 while (last
> start
&& last
->charpos
< 0)
4659 for (glyph
= start
; glyph
< last
; ++glyph
)
4661 cx
+= glyph
->pixel_width
;
4666 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4674 hpos
= w
->cursor
.hpos
;
4675 vpos
= w
->cursor
.vpos
;
4678 /* Window cursor can be out of sync for horizontally split windows. */
4679 hpos
= max (0, hpos
);
4680 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4681 vpos
= max (0, vpos
);
4682 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4683 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4687 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4688 tree rooted at W. */
4691 set_window_update_flags (w
, on_p
)
4697 if (!NILP (w
->hchild
))
4698 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4699 else if (!NILP (w
->vchild
))
4700 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4702 w
->must_be_updated_p
= on_p
;
4704 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4710 /***********************************************************************
4711 Window-Based Scrolling
4712 ***********************************************************************/
4714 /* Structure describing rows in scrolling_window. */
4718 /* Number of occurrences of this row in desired and current matrix. */
4719 int old_uses
, new_uses
;
4721 /* Vpos of row in new matrix. */
4722 int new_line_number
;
4724 /* Bucket index of this row_entry in the hash table row_table. */
4727 /* The row described by this entry. */
4728 struct glyph_row
*row
;
4730 /* Hash collision chain. */
4731 struct row_entry
*next
;
4734 /* A pool to allocate row_entry structures from, and the size of the
4735 pool. The pool is reallocated in scrolling_window when we find
4736 that we need a larger one. */
4738 static struct row_entry
*row_entry_pool
;
4739 static int row_entry_pool_size
;
4741 /* Index of next free entry in row_entry_pool. */
4743 static int row_entry_idx
;
4745 /* The hash table used during scrolling, and the table's size. This
4746 table is used to quickly identify equal rows in the desired and
4749 static struct row_entry
**row_table
;
4750 static int row_table_size
;
4752 /* Vectors of pointers to row_entry structures belonging to the
4753 current and desired matrix, and the size of the vectors. */
4755 static struct row_entry
**old_lines
, **new_lines
;
4756 static int old_lines_size
, new_lines_size
;
4758 /* A pool to allocate run structures from, and its size. */
4760 static struct run
*run_pool
;
4761 static int runs_size
;
4763 /* A vector of runs of lines found during scrolling. */
4765 static struct run
**runs
;
4767 /* Add glyph row ROW to the scrolling hash table during the scrolling
4770 static INLINE
struct row_entry
*
4771 add_row_entry (w
, row
)
4773 struct glyph_row
*row
;
4775 struct row_entry
*entry
;
4776 int i
= row
->hash
% row_table_size
;
4778 entry
= row_table
[i
];
4779 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4780 entry
= entry
->next
;
4784 entry
= row_entry_pool
+ row_entry_idx
++;
4786 entry
->old_uses
= entry
->new_uses
= 0;
4787 entry
->new_line_number
= 0;
4789 entry
->next
= row_table
[i
];
4790 row_table
[i
] = entry
;
4797 /* Try to reuse part of the current display of W by scrolling lines.
4798 HEADER_LINE_P non-zero means W has a header line.
4800 The algorithm is taken from Communications of the ACM, Apr78 "A
4801 Technique for Isolating Differences Between Files." It should take
4804 A short outline of the steps of the algorithm
4806 1. Skip lines equal at the start and end of both matrices.
4808 2. Enter rows in the current and desired matrix into a symbol
4809 table, counting how often they appear in both matrices.
4811 3. Rows that appear exactly once in both matrices serve as anchors,
4812 i.e. we assume that such lines are likely to have been moved.
4814 4. Starting from anchor lines, extend regions to be scrolled both
4815 forward and backward.
4819 -1 if all rows were found to be equal.
4820 0 to indicate that we did not scroll the display, or
4821 1 if we did scroll. */
4824 scrolling_window (w
, header_line_p
)
4828 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4829 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4830 int yb
= window_text_bottom_y (w
);
4831 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4832 int nruns
, nbytes
, n
, run_idx
;
4833 struct row_entry
*entry
;
4835 /* Skip over rows equal at the start. */
4836 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4838 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4839 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4843 && !d
->redraw_fringe_bitmaps_p
4845 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4846 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4847 && row_equal_p (w
, c
, d
, 1))
4856 /* Give up if some rows in the desired matrix are not enabled. */
4857 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4860 first_old
= first_new
= i
;
4862 /* Set last_new to the index + 1 of the last enabled row in the
4865 while (i
< desired_matrix
->nrows
- 1
4866 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4867 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4870 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4875 /* Set last_old to the index + 1 of the last enabled row in the
4876 current matrix. We don't look at the enabled flag here because
4877 we plan to reuse part of the display even if other parts are
4880 while (i
< current_matrix
->nrows
- 1)
4882 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4891 /* Skip over rows equal at the bottom. */
4894 while (i
- 1 > first_new
4895 && j
- 1 > first_old
4896 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4897 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4898 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4899 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4901 MATRIX_ROW (desired_matrix
, i
- 1),
4902 MATRIX_ROW (current_matrix
, j
- 1), 1))
4907 /* Nothing to do if all rows are equal. */
4908 if (last_new
== first_new
)
4911 /* Reallocate vectors, tables etc. if necessary. */
4913 if (current_matrix
->nrows
> old_lines_size
)
4915 old_lines_size
= current_matrix
->nrows
;
4916 nbytes
= old_lines_size
* sizeof *old_lines
;
4917 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4920 if (desired_matrix
->nrows
> new_lines_size
)
4922 new_lines_size
= desired_matrix
->nrows
;
4923 nbytes
= new_lines_size
* sizeof *new_lines
;
4924 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4927 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4928 if (3 * n
> row_table_size
)
4930 row_table_size
= next_almost_prime (3 * n
);
4931 nbytes
= row_table_size
* sizeof *row_table
;
4932 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4933 bzero (row_table
, nbytes
);
4936 if (n
> row_entry_pool_size
)
4938 row_entry_pool_size
= n
;
4939 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4940 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4943 if (desired_matrix
->nrows
> runs_size
)
4945 runs_size
= desired_matrix
->nrows
;
4946 nbytes
= runs_size
* sizeof *runs
;
4947 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4948 nbytes
= runs_size
* sizeof *run_pool
;
4949 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4952 nruns
= run_idx
= 0;
4955 /* Add rows from the current and desired matrix to the hash table
4956 row_hash_table to be able to find equal ones quickly. */
4958 for (i
= first_old
; i
< last_old
; ++i
)
4960 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4962 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4963 old_lines
[i
] = entry
;
4967 old_lines
[i
] = NULL
;
4970 for (i
= first_new
; i
< last_new
; ++i
)
4972 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4973 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4975 entry
->new_line_number
= i
;
4976 new_lines
[i
] = entry
;
4979 /* Identify moves based on lines that are unique and equal
4980 in both matrices. */
4981 for (i
= first_old
; i
< last_old
;)
4983 && old_lines
[i
]->old_uses
== 1
4984 && old_lines
[i
]->new_uses
== 1)
4987 int new_line
= old_lines
[i
]->new_line_number
;
4988 struct run
*run
= run_pool
+ run_idx
++;
4991 run
->current_vpos
= i
;
4992 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4993 run
->desired_vpos
= new_line
;
4994 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4996 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4998 /* Extend backward. */
5001 while (j
> first_old
5003 && old_lines
[j
] == new_lines
[k
])
5005 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5006 --run
->current_vpos
;
5007 --run
->desired_vpos
;
5010 run
->desired_y
-= h
;
5011 run
->current_y
-= h
;
5015 /* Extend forward. */
5020 && old_lines
[j
] == new_lines
[k
])
5022 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5028 /* Insert run into list of all runs. Order runs by copied
5029 pixel lines. Note that we record runs that don't have to
5030 be copied because they are already in place. This is done
5031 because we can avoid calling update_window_line in this
5033 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5035 for (k
= nruns
; k
> j
; --k
)
5036 runs
[k
] = runs
[k
- 1];
5045 /* Do the moves. Do it in a way that we don't overwrite something
5046 we want to copy later on. This is not solvable in general
5047 because there is only one display and we don't have a way to
5048 exchange areas on this display. Example:
5050 +-----------+ +-----------+
5052 +-----------+ --> +-----------+
5054 +-----------+ +-----------+
5056 Instead, prefer bigger moves, and invalidate moves that would
5057 copy from where we copied to. */
5059 for (i
= 0; i
< nruns
; ++i
)
5060 if (runs
[i
]->nrows
> 0)
5062 struct run
*r
= runs
[i
];
5064 /* Copy on the display. */
5065 if (r
->current_y
!= r
->desired_y
)
5067 rif
->scroll_run_hook (w
, r
);
5069 /* Invalidate runs that copy from where we copied to. */
5070 for (j
= i
+ 1; j
< nruns
; ++j
)
5072 struct run
*p
= runs
[j
];
5074 if ((p
->current_y
>= r
->desired_y
5075 && p
->current_y
< r
->desired_y
+ r
->height
)
5076 || (p
->current_y
+ p
->height
>= r
->desired_y
5077 && (p
->current_y
+ p
->height
5078 < r
->desired_y
+ r
->height
)))
5083 /* Assign matrix rows. */
5084 for (j
= 0; j
< r
->nrows
; ++j
)
5086 struct glyph_row
*from
, *to
;
5087 int to_overlapped_p
;
5089 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5090 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5091 to_overlapped_p
= to
->overlapped_p
;
5092 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5093 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5094 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5095 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5096 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5097 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5098 from
->redraw_fringe_bitmaps_p
= 1;
5099 assign_row (to
, from
);
5100 to
->enabled_p
= 1, from
->enabled_p
= 0;
5101 to
->overlapped_p
= to_overlapped_p
;
5105 /* Clear the hash table, for the next time. */
5106 for (i
= 0; i
< row_entry_idx
; ++i
)
5107 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5109 /* Value is > 0 to indicate that we scrolled the display. */
5115 /************************************************************************
5117 ************************************************************************/
5119 /* Update the desired frame matrix of frame F.
5121 FORCE_P non-zero means that the update should not be stopped by
5122 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5123 should not be tried.
5125 Value is non-zero if update was stopped due to pending input. */
5128 update_frame_1 (f
, force_p
, inhibit_id_p
)
5133 /* Frame matrices to work on. */
5134 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5135 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5138 int preempt_count
= baud_rate
/ 2400 + 1;
5139 extern int input_pending
;
5141 xassert (current_matrix
&& desired_matrix
);
5143 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5144 calculate_costs (f
);
5146 if (preempt_count
<= 0)
5149 if (redisplay_dont_pause
)
5151 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5157 /* If we cannot insert/delete lines, it's no use trying it. */
5158 if (!line_ins_del_ok
)
5161 /* See if any of the desired lines are enabled; don't compute for
5162 i/d line if just want cursor motion. */
5163 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5164 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5167 /* Try doing i/d line, if not yet inhibited. */
5168 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5169 force_p
|= scrolling (f
);
5171 /* Update the individual lines as needed. Do bottom line first. */
5172 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5173 update_frame_line (f
, desired_matrix
->nrows
- 1);
5175 /* Now update the rest of the lines. */
5176 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5178 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5180 if (FRAME_TERMCAP_P (f
))
5182 /* Flush out every so many lines.
5183 Also flush out if likely to have more than 1k buffered
5184 otherwise. I'm told that some telnet connections get
5185 really screwed by more than 1k output at once. */
5186 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5188 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5191 if (preempt_count
== 1)
5193 #ifdef EMACS_OUTQSIZE
5194 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5195 /* Probably not a tty. Ignore the error and reset
5197 outq
= PENDING_OUTPUT_COUNT (stdout
);
5200 if (baud_rate
<= outq
&& baud_rate
> 0)
5201 sleep (outq
/ baud_rate
);
5206 if ((i
- 1) % preempt_count
== 0)
5207 detect_input_pending_ignore_squeezables ();
5209 update_frame_line (f
, i
);
5213 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5215 /* Now just clean up termcap drivers and set cursor, etc. */
5218 if ((cursor_in_echo_area
5219 /* If we are showing a message instead of the mini-buffer,
5220 show the cursor for the message instead of for the
5221 (now hidden) mini-buffer contents. */
5222 || (EQ (minibuf_window
, selected_window
)
5223 && EQ (minibuf_window
, echo_area_window
)
5224 && !NILP (echo_area_buffer
[0])))
5225 /* These cases apply only to the frame that contains
5226 the active mini-buffer window. */
5227 && FRAME_HAS_MINIBUF_P (f
)
5228 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5230 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5233 if (cursor_in_echo_area
< 0)
5235 /* Negative value of cursor_in_echo_area means put
5236 cursor at beginning of line. */
5242 /* Positive value of cursor_in_echo_area means put
5243 cursor at the end of the prompt. If the mini-buffer
5244 is several lines high, find the last line that has
5246 row
= FRAME_LINES (f
);
5252 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5254 /* Frame rows are filled up with spaces that
5255 must be ignored here. */
5256 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5258 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5259 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5262 && (last
- 1)->charpos
< 0)
5268 while (row
> top
&& col
== 0);
5270 /* Make sure COL is not out of range. */
5271 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5273 /* If we have another row, advance cursor into it. */
5274 if (row
< FRAME_LINES (f
) - 1)
5276 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5279 /* Otherwise move it back in range. */
5281 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5285 cursor_to (row
, col
);
5289 /* We have only one cursor on terminal frames. Use it to
5290 display the cursor of the selected window. */
5291 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5292 if (w
->cursor
.vpos
>= 0
5293 /* The cursor vpos may be temporarily out of bounds
5294 in the following situation: There is one window,
5295 with the cursor in the lower half of it. The window
5296 is split, and a message causes a redisplay before
5297 a new cursor position has been computed. */
5298 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5300 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5301 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5303 if (INTEGERP (w
->left_margin_cols
))
5304 x
+= XFASTINT (w
->left_margin_cols
);
5306 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5314 clear_desired_matrices (f
);
5319 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5323 struct frame
*frame
;
5325 int unchanged_at_top
, unchanged_at_bottom
;
5328 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5329 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5330 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5331 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5333 int free_at_end_vpos
= FRAME_LINES (frame
);
5334 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5335 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5337 if (!current_matrix
)
5340 /* Compute hash codes of all the lines. Also calculate number of
5341 changed lines, number of unchanged lines at the beginning, and
5342 number of unchanged lines at the end. */
5344 unchanged_at_top
= 0;
5345 unchanged_at_bottom
= FRAME_LINES (frame
);
5346 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5348 /* Give up on this scrolling if some old lines are not enabled. */
5349 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5351 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5352 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5354 /* This line cannot be redrawn, so don't let scrolling mess it. */
5355 new_hash
[i
] = old_hash
[i
];
5356 #define INFINITY 1000000 /* Taken from scroll.c */
5357 draw_cost
[i
] = INFINITY
;
5361 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5362 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5365 if (old_hash
[i
] != new_hash
[i
])
5368 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5370 else if (i
== unchanged_at_top
)
5372 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5375 /* If changed lines are few, don't allow preemption, don't scroll. */
5376 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5377 || unchanged_at_bottom
== FRAME_LINES (frame
))
5380 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5381 - unchanged_at_bottom
);
5383 if (scroll_region_ok
)
5384 free_at_end_vpos
-= unchanged_at_bottom
;
5385 else if (memory_below_frame
)
5386 free_at_end_vpos
= -1;
5388 /* If large window, fast terminal and few lines in common between
5389 current frame and desired frame, don't bother with i/d calc. */
5390 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5392 10 * scrolling_max_lines_saved (unchanged_at_top
,
5393 FRAME_LINES (frame
) - unchanged_at_bottom
,
5394 old_hash
, new_hash
, draw_cost
)))
5397 if (window_size
< 2)
5400 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5401 draw_cost
+ unchanged_at_top
- 1,
5402 old_draw_cost
+ unchanged_at_top
- 1,
5403 old_hash
+ unchanged_at_top
- 1,
5404 new_hash
+ unchanged_at_top
- 1,
5405 free_at_end_vpos
- unchanged_at_top
);
5411 /* Count the number of blanks at the start of the vector of glyphs R
5412 which is LEN glyphs long. */
5415 count_blanks (r
, len
)
5421 for (i
= 0; i
< len
; ++i
)
5422 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5429 /* Count the number of glyphs in common at the start of the glyph
5430 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5431 of STR2. Value is the number of equal glyphs equal at the start. */
5434 count_match (str1
, end1
, str2
, end2
)
5435 struct glyph
*str1
, *end1
, *str2
, *end2
;
5437 struct glyph
*p1
= str1
;
5438 struct glyph
*p2
= str2
;
5442 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5449 /* Char insertion/deletion cost vector, from term.c */
5451 extern int *char_ins_del_vector
;
5452 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5455 /* Perform a frame-based update on line VPOS in frame FRAME. */
5458 update_frame_line (f
, vpos
)
5462 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5464 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5465 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5466 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5467 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5468 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5469 int must_write_whole_line_p
;
5470 int write_spaces_p
= must_write_spaces
;
5471 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5472 != FACE_TTY_DEFAULT_BG_COLOR
);
5474 if (colored_spaces_p
)
5477 /* Current row not enabled means it has unknown contents. We must
5478 write the whole desired line in that case. */
5479 must_write_whole_line_p
= !current_row
->enabled_p
;
5480 if (must_write_whole_line_p
)
5487 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5488 olen
= current_row
->used
[TEXT_AREA
];
5490 /* Ignore trailing spaces, if we can. */
5491 if (!write_spaces_p
)
5492 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5496 current_row
->enabled_p
= 1;
5497 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5499 /* If desired line is empty, just clear the line. */
5500 if (!desired_row
->enabled_p
)
5506 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5507 nlen
= desired_row
->used
[TEXT_AREA
];
5508 nend
= nbody
+ nlen
;
5510 /* If display line has unknown contents, write the whole line. */
5511 if (must_write_whole_line_p
)
5513 /* Ignore spaces at the end, if we can. */
5514 if (!write_spaces_p
)
5515 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5518 /* Write the contents of the desired line. */
5521 cursor_to (vpos
, 0);
5522 write_glyphs (nbody
, nlen
);
5525 /* Don't call clear_end_of_line if we already wrote the whole
5526 line. The cursor will not be at the right margin in that
5527 case but in the line below. */
5528 if (nlen
< FRAME_TOTAL_COLS (f
))
5530 cursor_to (vpos
, nlen
);
5531 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5534 /* Make sure we are in the right row, otherwise cursor movement
5535 with cmgoto might use `ch' in the wrong row. */
5536 cursor_to (vpos
, 0);
5538 make_current (desired_matrix
, current_matrix
, vpos
);
5542 /* Pretend trailing spaces are not there at all,
5543 unless for one reason or another we must write all spaces. */
5544 if (!write_spaces_p
)
5545 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5548 /* If there's no i/d char, quickly do the best we can without it. */
5549 if (!char_ins_del_ok
)
5553 /* Find the first glyph in desired row that doesn't agree with
5554 a glyph in the current row, and write the rest from there on. */
5555 for (i
= 0; i
< nlen
; i
++)
5557 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5559 /* Find the end of the run of different glyphs. */
5563 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5564 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5567 /* Output this run of non-matching chars. */
5568 cursor_to (vpos
, i
);
5569 write_glyphs (nbody
+ i
, j
- i
);
5572 /* Now find the next non-match. */
5576 /* Clear the rest of the line, or the non-clear part of it. */
5579 cursor_to (vpos
, nlen
);
5580 clear_end_of_line (olen
);
5583 /* Make current row = desired row. */
5584 make_current (desired_matrix
, current_matrix
, vpos
);
5588 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5589 characters in a row. */
5593 /* If current line is blank, skip over initial spaces, if
5594 possible, and write the rest. */
5598 nsp
= count_blanks (nbody
, nlen
);
5602 cursor_to (vpos
, nsp
);
5603 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5606 /* Exchange contents between current_frame and new_frame. */
5607 make_current (desired_matrix
, current_matrix
, vpos
);
5611 /* Compute number of leading blanks in old and new contents. */
5612 osp
= count_blanks (obody
, olen
);
5613 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5615 /* Compute number of matching chars starting with first non-blank. */
5616 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5617 nbody
+ nsp
, nbody
+ nlen
);
5619 /* Spaces in new match implicit space past the end of old. */
5620 /* A bug causing this to be a no-op was fixed in 18.29. */
5621 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5624 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5628 /* Avoid doing insert/delete char
5629 just cause number of leading spaces differs
5630 when the following text does not match. */
5631 if (begmatch
== 0 && osp
!= nsp
)
5632 osp
= nsp
= min (osp
, nsp
);
5634 /* Find matching characters at end of line */
5637 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5639 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5644 endmatch
= obody
+ olen
- op1
;
5646 /* tem gets the distance to insert or delete.
5647 endmatch is how many characters we save by doing so.
5650 tem
= (nlen
- nsp
) - (olen
- osp
);
5652 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5655 /* nsp - osp is the distance to insert or delete.
5656 If that is nonzero, begmatch is known to be nonzero also.
5657 begmatch + endmatch is how much we save by doing the ins/del.
5661 && (!char_ins_del_ok
5662 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5666 osp
= nsp
= min (osp
, nsp
);
5669 /* Now go through the line, inserting, writing and
5670 deleting as appropriate. */
5674 cursor_to (vpos
, nsp
);
5675 delete_glyphs (osp
- nsp
);
5679 /* If going to delete chars later in line
5680 and insert earlier in the line,
5681 must delete first to avoid losing data in the insert */
5682 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5684 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5685 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5686 olen
= nlen
- (nsp
- osp
);
5688 cursor_to (vpos
, osp
);
5689 insert_glyphs (0, nsp
- osp
);
5693 tem
= nsp
+ begmatch
+ endmatch
;
5694 if (nlen
!= tem
|| olen
!= tem
)
5696 if (!endmatch
|| nlen
== olen
)
5698 /* If new text being written reaches right margin, there is
5699 no need to do clear-to-eol at the end of this function
5700 (and it would not be safe, since cursor is not going to
5701 be "at the margin" after the text is done). */
5702 if (nlen
== FRAME_TOTAL_COLS (f
))
5705 /* Function write_glyphs is prepared to do nothing
5706 if passed a length <= 0. Check it here to avoid
5707 unnecessary cursor movement. */
5710 cursor_to (vpos
, nsp
+ begmatch
);
5711 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5714 else if (nlen
> olen
)
5716 /* Here, we used to have the following simple code:
5717 ----------------------------------------
5718 write_glyphs (nbody + nsp + begmatch, olen - tem);
5719 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5720 ----------------------------------------
5721 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5722 is a padding glyph. */
5723 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5726 cursor_to (vpos
, nsp
+ begmatch
);
5728 /* Calculate columns we can actually overwrite. */
5729 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5731 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5733 /* If we left columns to be overwritten, we must delete them. */
5734 del
= olen
- tem
- out
;
5736 delete_glyphs (del
);
5738 /* At last, we insert columns not yet written out. */
5739 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5742 else if (olen
> nlen
)
5744 cursor_to (vpos
, nsp
+ begmatch
);
5745 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5746 delete_glyphs (olen
- nlen
);
5752 /* If any unerased characters remain after the new line, erase them. */
5755 cursor_to (vpos
, nlen
);
5756 clear_end_of_line (olen
);
5759 /* Exchange contents between current_frame and new_frame. */
5760 make_current (desired_matrix
, current_matrix
, vpos
);
5765 /***********************************************************************
5766 X/Y Position -> Buffer Position
5767 ***********************************************************************/
5769 /* Determine what's under window-relative pixel position (*X, *Y).
5770 Return the object (string or buffer) that's there.
5771 Return in *POS the position in that object.
5772 Adjust *X and *Y to character positions. */
5775 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5778 struct display_pos
*pos
;
5779 Lisp_Object
*object
;
5781 int *width
, *height
;
5784 struct buffer
*old_current_buffer
= current_buffer
;
5785 struct text_pos startp
;
5787 struct glyph_row
*row
;
5788 #ifdef HAVE_WINDOW_SYSTEM
5789 struct image
*img
= 0;
5793 current_buffer
= XBUFFER (w
->buffer
);
5794 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5795 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5796 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5797 start_display (&it
, w
, startp
);
5799 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5800 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5801 MOVE_TO_X
| MOVE_TO_Y
);
5803 current_buffer
= old_current_buffer
;
5805 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5806 *dy
= *y
- it
.current_y
;
5809 if (STRINGP (it
.string
))
5813 #ifdef HAVE_WINDOW_SYSTEM
5814 if (it
.what
== IT_IMAGE
)
5816 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5817 && !NILP (img
->spec
))
5818 *object
= img
->spec
;
5822 if (it
.vpos
< w
->current_matrix
->nrows
5823 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5826 if (it
.hpos
< row
->used
[TEXT_AREA
])
5828 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5829 #ifdef HAVE_WINDOW_SYSTEM
5832 *dy
-= row
->ascent
- glyph
->ascent
;
5833 *dx
+= glyph
->slice
.x
;
5834 *dy
+= glyph
->slice
.y
;
5835 /* Image slices positions are still relative to the entire image */
5836 *width
= img
->width
;
5837 *height
= img
->height
;
5842 *width
= glyph
->pixel_width
;
5843 *height
= glyph
->ascent
+ glyph
->descent
;
5849 *height
= row
->height
;
5854 *width
= *height
= 0;
5857 /* Add extra (default width) columns if clicked after EOL. */
5858 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5860 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5869 /* Value is the string under window-relative coordinates X/Y in the
5870 mode line or header line (PART says which) of window W, or nil if none.
5871 *CHARPOS is set to the position in the string returned. */
5874 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5876 enum window_part part
;
5879 Lisp_Object
*object
;
5881 int *width
, *height
;
5883 struct glyph_row
*row
;
5884 struct glyph
*glyph
, *end
;
5886 Lisp_Object string
= Qnil
;
5888 if (part
== ON_MODE_LINE
)
5889 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5891 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5893 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5895 if (row
->mode_line_p
&& row
->enabled_p
)
5897 /* Find the glyph under X. If we find one with a string object,
5898 it's the one we were looking for. */
5899 glyph
= row
->glyphs
[TEXT_AREA
];
5900 end
= glyph
+ row
->used
[TEXT_AREA
];
5901 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5902 x0
-= glyph
->pixel_width
;
5903 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5906 string
= glyph
->object
;
5907 *charpos
= glyph
->charpos
;
5908 *width
= glyph
->pixel_width
;
5909 *height
= glyph
->ascent
+ glyph
->descent
;
5910 #ifdef HAVE_WINDOW_SYSTEM
5911 if (glyph
->type
== IMAGE_GLYPH
)
5914 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5916 *object
= img
->spec
;
5917 y0
-= row
->ascent
- glyph
->ascent
;
5923 /* Add extra (default width) columns if clicked after EOL. */
5924 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5926 *height
= row
->height
;
5933 *width
= *height
= 0;
5943 /* Value is the string under window-relative coordinates X/Y in either
5944 marginal area, or nil if none. *CHARPOS is set to the position in
5945 the string returned. */
5948 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5950 enum window_part part
;
5953 Lisp_Object
*object
;
5955 int *width
, *height
;
5957 struct glyph_row
*row
= w
->current_matrix
->rows
;
5958 struct glyph
*glyph
, *end
;
5959 int x0
, y0
, i
, wy
= *y
;
5961 Lisp_Object string
= Qnil
;
5963 if (part
== ON_LEFT_MARGIN
)
5964 area
= LEFT_MARGIN_AREA
;
5965 else if (part
== ON_RIGHT_MARGIN
)
5966 area
= RIGHT_MARGIN_AREA
;
5970 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5971 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5974 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5978 /* Find the glyph under X. If we find one with a string object,
5979 it's the one we were looking for. */
5980 if (area
== RIGHT_MARGIN_AREA
)
5981 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5982 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5983 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5984 + window_box_width (w
, LEFT_MARGIN_AREA
)
5985 + window_box_width (w
, TEXT_AREA
));
5987 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5988 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5991 glyph
= row
->glyphs
[area
];
5992 end
= glyph
+ row
->used
[area
];
5993 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5994 x0
-= glyph
->pixel_width
;
5995 *x
= glyph
- row
->glyphs
[area
];
5998 string
= glyph
->object
;
5999 *charpos
= glyph
->charpos
;
6000 *width
= glyph
->pixel_width
;
6001 *height
= glyph
->ascent
+ glyph
->descent
;
6002 #ifdef HAVE_WINDOW_SYSTEM
6003 if (glyph
->type
== IMAGE_GLYPH
)
6006 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6008 *object
= img
->spec
;
6009 y0
-= row
->ascent
- glyph
->ascent
;
6010 x0
+= glyph
->slice
.x
;
6011 y0
+= glyph
->slice
.y
;
6017 /* Add extra (default width) columns if clicked after EOL. */
6018 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6020 *height
= row
->height
;
6027 *width
= *height
= 0;
6037 /***********************************************************************
6038 Changing Frame Sizes
6039 ***********************************************************************/
6044 window_change_signal (signalnum
) /* If we don't have an argument, */
6045 int signalnum
; /* some compilers complain in signal calls. */
6051 int old_errno
= errno
;
6053 signal (SIGWINCH
, window_change_signal
);
6054 SIGNAL_THREAD_CHECK (signalnum
);
6056 get_frame_size (&width
, &height
);
6058 /* The frame size change obviously applies to a termcap-controlled
6059 frame. Find such a frame in the list, and assume it's the only
6060 one (since the redisplay code always writes to stdout, not a
6061 FILE * specified in the frame structure). Record the new size,
6062 but don't reallocate the data structures now. Let that be done
6063 later outside of the signal handler. */
6066 Lisp_Object tail
, frame
;
6068 FOR_EACH_FRAME (tail
, frame
)
6070 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6072 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6080 #endif /* SIGWINCH */
6083 /* Do any change in frame size that was requested by a signal. SAFE
6084 non-zero means this function is called from a place where it is
6085 safe to change frame sizes while a redisplay is in progress. */
6088 do_pending_window_change (safe
)
6091 /* If window_change_signal should have run before, run it now. */
6092 if (redisplaying_p
&& !safe
)
6095 while (delayed_size_change
)
6097 Lisp_Object tail
, frame
;
6099 delayed_size_change
= 0;
6101 FOR_EACH_FRAME (tail
, frame
)
6103 struct frame
*f
= XFRAME (frame
);
6105 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6106 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6113 /* Change the frame height and/or width. Values may be given as zero to
6114 indicate no change is to take place.
6116 If DELAY is non-zero, then assume we're being called from a signal
6117 handler, and queue the change for later - perhaps the next
6118 redisplay. Since this tries to resize windows, we can't call it
6119 from a signal handler.
6121 SAFE non-zero means this function is called from a place where it's
6122 safe to change frame sizes while a redisplay is in progress. */
6125 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6126 register struct frame
*f
;
6127 int newheight
, newwidth
, pretend
, delay
, safe
;
6129 Lisp_Object tail
, frame
;
6131 if (! FRAME_WINDOW_P (f
))
6133 /* When using termcap, or on MS-DOS, all frames use
6134 the same screen, so a change in size affects all frames. */
6135 FOR_EACH_FRAME (tail
, frame
)
6136 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6137 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6138 pretend
, delay
, safe
);
6141 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6145 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6146 register struct frame
*f
;
6147 int newheight
, newwidth
, pretend
, delay
, safe
;
6149 int new_frame_total_cols
;
6150 int count
= SPECPDL_INDEX ();
6152 /* If we can't deal with the change now, queue it for later. */
6153 if (delay
|| (redisplaying_p
&& !safe
))
6155 f
->new_text_lines
= newheight
;
6156 f
->new_text_cols
= newwidth
;
6157 delayed_size_change
= 1;
6161 /* This size-change overrides any pending one for this frame. */
6162 f
->new_text_lines
= 0;
6163 f
->new_text_cols
= 0;
6165 /* If an argument is zero, set it to the current value. */
6167 newheight
= FRAME_LINES (f
);
6169 newwidth
= FRAME_COLS (f
);
6171 /* Compute width of windows in F.
6172 This is the width of the frame without vertical scroll bars. */
6173 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6175 /* Round up to the smallest acceptable size. */
6176 check_frame_size (f
, &newheight
, &newwidth
);
6178 /* If we're not changing the frame size, quit now. */
6179 if (newheight
== FRAME_LINES (f
)
6180 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6186 /* We only can set screen dimensions to certain values supported
6187 by our video hardware. Try to find the smallest size greater
6188 or equal to the requested dimensions. */
6189 dos_set_window_size (&newheight
, &newwidth
);
6192 if (newheight
!= FRAME_LINES (f
))
6194 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6196 /* Frame has both root and mini-buffer. */
6197 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6198 FRAME_TOP_MARGIN (f
));
6199 set_window_height (FRAME_ROOT_WINDOW (f
),
6202 - FRAME_TOP_MARGIN (f
)),
6204 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6206 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6209 /* Frame has just one top-level window. */
6210 set_window_height (FRAME_ROOT_WINDOW (f
),
6211 newheight
- FRAME_TOP_MARGIN (f
), 0);
6213 if (FRAME_TERMCAP_P (f
) && !pretend
)
6214 FrameRows
= newheight
;
6217 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6219 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6220 if (FRAME_HAS_MINIBUF_P (f
))
6221 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6223 if (FRAME_TERMCAP_P (f
) && !pretend
)
6224 FrameCols
= newwidth
;
6226 if (WINDOWP (f
->tool_bar_window
))
6227 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6230 FRAME_LINES (f
) = newheight
;
6231 SET_FRAME_COLS (f
, newwidth
);
6234 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6235 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6237 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6239 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6240 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6241 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6242 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6246 calculate_costs (f
);
6247 SET_FRAME_GARBAGED (f
);
6252 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6254 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6255 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6256 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6258 unbind_to (count
, Qnil
);
6263 /***********************************************************************
6264 Terminal Related Lisp Functions
6265 ***********************************************************************/
6267 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6268 1, 1, "FOpen termscript file: ",
6269 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6270 FILE = nil means just close any termscript file currently open. */)
6274 if (termscript
!= 0) fclose (termscript
);
6279 file
= Fexpand_file_name (file
, Qnil
);
6280 termscript
= fopen (SDATA (file
), "w");
6281 if (termscript
== 0)
6282 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6288 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6289 Ssend_string_to_terminal
, 1, 1, 0,
6290 doc
: /* Send STRING to the terminal without alteration.
6291 Control characters in STRING will have terminal-dependent effects. */)
6295 /* ??? Perhaps we should do something special for multibyte strings here. */
6296 CHECK_STRING (string
);
6297 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6301 fwrite (SDATA (string
), 1, SBYTES (string
),
6303 fflush (termscript
);
6309 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6310 doc
: /* Beep, or flash the screen.
6311 Also, unless an argument is given,
6312 terminate any keyboard macro currently executing. */)
6335 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6336 error ("Keyboard macro terminated by a command ringing the bell");
6344 /***********************************************************************
6346 ***********************************************************************/
6348 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6349 doc
: /* Pause, without updating display, for SECONDS seconds.
6350 SECONDS may be a floating-point value, meaning that you can wait for a
6351 fraction of a second. Optional second arg MILLISECONDS specifies an
6352 additional wait period, in milliseconds; this may be useful if your
6353 Emacs was built without floating point support.
6354 \(Not all operating systems support waiting for a fraction of a second.) */)
6355 (seconds
, milliseconds
)
6356 Lisp_Object seconds
, milliseconds
;
6360 if (NILP (milliseconds
))
6361 XSETINT (milliseconds
, 0);
6363 CHECK_NUMBER (milliseconds
);
6364 usec
= XINT (milliseconds
) * 1000;
6367 double duration
= extract_float (seconds
);
6368 sec
= (int) duration
;
6369 usec
+= (duration
- sec
) * 1000000;
6372 #ifndef EMACS_HAS_USECS
6373 if (sec
== 0 && usec
!= 0)
6374 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6377 /* Assure that 0 <= usec < 1000000. */
6380 /* We can't rely on the rounding being correct if usec is negative. */
6381 if (-1000000 < usec
)
6382 sec
--, usec
+= 1000000;
6384 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6387 sec
+= usec
/ 1000000, usec
%= 1000000;
6389 if (sec
< 0 || (sec
== 0 && usec
== 0))
6392 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6398 /* This is just like wait_reading_process_output, except that
6399 it does the redisplay.
6401 It's also much like Fsit_for, except that it can be used for
6402 waiting for input as well. */
6405 sit_for (sec
, usec
, reading
, display
, initial_display
)
6406 int sec
, usec
, reading
, display
, initial_display
;
6408 swallow_events (display
);
6410 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6413 if (initial_display
)
6414 redisplay_preserve_echo_area (2);
6416 if (sec
== 0 && usec
== 0)
6423 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6426 return detect_input_pending () ? Qnil
: Qt
;
6430 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6431 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6432 SECONDS may be a floating-point value, meaning that you can wait for a
6433 fraction of a second.
6434 \(Not all operating systems support waiting for a fraction of a second.)
6435 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6436 Redisplay is preempted as always if input arrives, and does not happen
6437 if input is available before it starts.
6438 Value is t if waited the full time with no input arriving.
6440 An obsolete but still supported form is
6441 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6442 Where the optional arg MILLISECONDS specifies an additional wait period,
6443 in milliseconds; this was useful when Emacs was built without
6444 floating point support.
6445 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6447 /* The `old-nodisp' stuff is there so that the arglist has the correct
6448 length. Otherwise, `defdvice' will redefine it with fewer args. */
6449 (seconds
, milliseconds
, nodisp
)
6450 Lisp_Object seconds
, milliseconds
, nodisp
;
6454 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6456 nodisp
= milliseconds
;
6457 milliseconds
= Qnil
;
6460 if (NILP (milliseconds
))
6461 XSETINT (milliseconds
, 0);
6463 CHECK_NUMBER (milliseconds
);
6464 usec
= XINT (milliseconds
) * 1000;
6467 double duration
= extract_float (seconds
);
6468 sec
= (int) duration
;
6469 usec
+= (duration
- sec
) * 1000000;
6472 #ifndef EMACS_HAS_USECS
6473 if (usec
!= 0 && sec
== 0)
6474 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6477 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6482 /***********************************************************************
6483 Other Lisp Functions
6484 ***********************************************************************/
6486 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6487 session's frames, frame names, buffers, buffer-read-only flags, and
6488 buffer-modified-flags. */
6490 static Lisp_Object frame_and_buffer_state
;
6493 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6494 Sframe_or_buffer_changed_p
, 0, 1, 0,
6495 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6496 VARIABLE is a variable name whose value is either nil or a state vector
6497 that will be updated to contain all frames and buffers,
6498 aside from buffers whose names start with space,
6499 along with the buffers' read-only and modified flags. This allows a fast
6500 check to see whether buffer menus might need to be recomputed.
6501 If this function returns non-nil, it updates the internal vector to reflect
6504 If VARIABLE is nil, an internal variable is used. Users should not
6505 pass nil for VARIABLE. */)
6507 Lisp_Object variable
;
6509 Lisp_Object state
, tail
, frame
, buf
;
6510 Lisp_Object
*vecp
, *end
;
6513 if (! NILP (variable
))
6515 CHECK_SYMBOL (variable
);
6516 state
= Fsymbol_value (variable
);
6517 if (! VECTORP (state
))
6521 state
= frame_and_buffer_state
;
6523 vecp
= XVECTOR (state
)->contents
;
6524 end
= vecp
+ XVECTOR (state
)->size
;
6526 FOR_EACH_FRAME (tail
, frame
)
6530 if (!EQ (*vecp
++, frame
))
6534 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6537 /* Check that the buffer info matches. */
6538 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6540 buf
= XCDR (XCAR (tail
));
6541 /* Ignore buffers that aren't included in buffer lists. */
6542 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6546 if (!EQ (*vecp
++, buf
))
6550 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6554 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6559 /* Detect deletion of a buffer at the end of the list. */
6560 if (EQ (*vecp
, Qlambda
))
6563 /* Come here if we decide the data has changed. */
6565 /* Count the size we will need.
6566 Start with 1 so there is room for at least one lambda at the end. */
6568 FOR_EACH_FRAME (tail
, frame
)
6570 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6572 /* Reallocate the vector if data has grown to need it,
6573 or if it has shrunk a lot. */
6574 if (! VECTORP (state
)
6575 || n
> XVECTOR (state
)->size
6576 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6577 /* Add 20 extra so we grow it less often. */
6579 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6580 if (! NILP (variable
))
6581 Fset (variable
, state
);
6583 frame_and_buffer_state
= state
;
6586 /* Record the new data in the (possibly reallocated) vector. */
6587 vecp
= XVECTOR (state
)->contents
;
6588 FOR_EACH_FRAME (tail
, frame
)
6591 *vecp
++ = XFRAME (frame
)->name
;
6593 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6595 buf
= XCDR (XCAR (tail
));
6596 /* Ignore buffers that aren't included in buffer lists. */
6597 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6600 *vecp
++ = XBUFFER (buf
)->read_only
;
6601 *vecp
++ = Fbuffer_modified_p (buf
);
6603 /* Fill up the vector with lambdas (always at least one). */
6605 while (vecp
- XVECTOR (state
)->contents
6606 < XVECTOR (state
)->size
)
6608 /* Make sure we didn't overflow the vector. */
6609 if (vecp
- XVECTOR (state
)->contents
6610 > XVECTOR (state
)->size
)
6617 /***********************************************************************
6619 ***********************************************************************/
6621 char *terminal_type
;
6623 /* Initialization done when Emacs fork is started, before doing stty.
6624 Determine terminal type and set terminal_driver. Then invoke its
6625 decoding routine to set up variables in the terminal package. */
6630 #ifdef HAVE_X_WINDOWS
6631 extern int display_arg
;
6634 /* Construct the space glyph. */
6635 space_glyph
.type
= CHAR_GLYPH
;
6636 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6637 space_glyph
.charpos
= -1;
6641 cursor_in_echo_area
= 0;
6642 terminal_type
= (char *) 0;
6644 /* Now is the time to initialize this; it's used by init_sys_modes
6646 Vwindow_system
= Qnil
;
6648 /* If the user wants to use a window system, we shouldn't bother
6649 initializing the terminal. This is especially important when the
6650 terminal is so dumb that emacs gives up before and doesn't bother
6651 using the window system.
6653 If the DISPLAY environment variable is set and nonempty,
6654 try to use X, and die with an error message if that doesn't work. */
6656 #ifdef HAVE_X_WINDOWS
6657 if (! inhibit_window_system
&& ! display_arg
)
6661 display
= getenv ("DECW$DISPLAY");
6663 display
= getenv ("DISPLAY");
6666 display_arg
= (display
!= 0 && *display
!= 0);
6668 if (display_arg
&& !x_display_ok (display
))
6670 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6672 inhibit_window_system
= 1;
6676 if (!inhibit_window_system
&& display_arg
6682 Vwindow_system
= intern ("x");
6684 Vwindow_system_version
= make_number (11);
6686 Vwindow_system_version
= make_number (10);
6688 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6689 /* In some versions of ncurses,
6690 tputs crashes if we have not called tgetent.
6692 { char b
[2044]; tgetent (b
, "xterm");}
6694 adjust_frame_glyphs_initially ();
6697 #endif /* HAVE_X_WINDOWS */
6700 if (!inhibit_window_system
)
6702 Vwindow_system
= intern ("w32");
6703 Vwindow_system_version
= make_number (1);
6704 adjust_frame_glyphs_initially ();
6707 #endif /* HAVE_NTGUI */
6710 if (!inhibit_window_system
)
6712 Vwindow_system
= intern ("mac");
6713 Vwindow_system_version
= make_number (1);
6714 adjust_frame_glyphs_initially ();
6719 /* If no window system has been specified, try to use the terminal. */
6722 fatal ("standard input is not a tty");
6726 /* Look at the TERM variable. */
6727 terminal_type
= (char *) getenv ("TERM");
6731 fprintf (stderr
, "Please specify your terminal type.\n\
6732 For types defined in VMS, use set term /device=TYPE.\n\
6733 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6734 \(The quotation marks are necessary since terminal types are lower case.)\n");
6736 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6742 /* VMS DCL tends to up-case things, so down-case term type.
6743 Hardly any uppercase letters in terminal types; should be none. */
6745 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6748 strcpy (new, terminal_type
);
6750 for (p
= new; *p
; p
++)
6754 terminal_type
= new;
6758 term_init (terminal_type
);
6761 struct frame
*sf
= SELECTED_FRAME ();
6762 int width
= FRAME_TOTAL_COLS (sf
);
6763 int height
= FRAME_LINES (sf
);
6765 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6767 /* If these sizes are so big they cause overflow, just ignore the
6768 change. It's not clear what better we could do. */
6769 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6770 fatal ("screen size %dx%d too big", width
, height
);
6773 adjust_frame_glyphs_initially ();
6774 calculate_costs (XFRAME (selected_frame
));
6779 #endif /* CANNOT_DUMP */
6780 signal (SIGWINCH
, window_change_signal
);
6781 #endif /* SIGWINCH */
6783 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6787 /* The MSDOS terminal turns on its ``window system'' relatively
6788 late into the startup, so we cannot do the frame faces'
6789 initialization just yet. It will be done later by pc-win.el
6790 and internal_terminal_init. */
6791 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6793 && NILP (Vwindow_system
))
6795 /* For the initial frame, we don't have any way of knowing what
6796 are the foreground and background colors of the terminal. */
6797 struct frame
*sf
= SELECTED_FRAME();
6799 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6800 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6801 call0 (intern ("tty-set-up-initial-frame-faces"));
6807 /***********************************************************************
6809 ***********************************************************************/
6811 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6812 Sinternal_show_cursor
, 2, 2, 0,
6813 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6814 WINDOW nil means use the selected window. SHOW non-nil means
6815 show a cursor in WINDOW in the next redisplay. SHOW nil means
6816 don't show a cursor. */)
6818 Lisp_Object window
, show
;
6820 /* Don't change cursor state while redisplaying. This could confuse
6822 if (!redisplaying_p
)
6825 window
= selected_window
;
6827 CHECK_WINDOW (window
);
6829 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6836 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6837 Sinternal_show_cursor_p
, 0, 1, 0,
6838 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6839 WINDOW nil or omitted means report on the selected window. */)
6846 window
= selected_window
;
6848 CHECK_WINDOW (window
);
6850 w
= XWINDOW (window
);
6851 return w
->cursor_off_p
? Qnil
: Qt
;
6855 /***********************************************************************
6857 ***********************************************************************/
6862 defsubr (&Sredraw_frame
);
6863 defsubr (&Sredraw_display
);
6864 defsubr (&Sframe_or_buffer_changed_p
);
6865 defsubr (&Sopen_termscript
);
6867 defsubr (&Ssit_for
);
6868 defsubr (&Ssleep_for
);
6869 defsubr (&Ssend_string_to_terminal
);
6870 defsubr (&Sinternal_show_cursor
);
6871 defsubr (&Sinternal_show_cursor_p
);
6874 defsubr (&Sdump_redisplay_history
);
6877 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6878 staticpro (&frame_and_buffer_state
);
6880 Qdisplay_table
= intern ("display-table");
6881 staticpro (&Qdisplay_table
);
6882 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6883 staticpro (&Qredisplay_dont_pause
);
6885 DEFVAR_INT ("baud-rate", &baud_rate
,
6886 doc
: /* *The output baud rate of the terminal.
6887 On most systems, changing this value will affect the amount of padding
6888 and the other strategic decisions made during redisplay. */);
6890 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6891 doc
: /* *Non-nil means invert the entire frame display.
6892 This means everything is in inverse video which otherwise would not be. */);
6894 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6895 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6897 See also `ring-bell-function'. */);
6899 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6900 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6901 A non-nil value is useful if the terminal can automatically preserve
6902 Emacs's frame display when you reenter Emacs.
6903 It is up to you to set this variable if your terminal can do that. */);
6905 DEFVAR_LISP ("window-system", &Vwindow_system
,
6906 doc
: /* Name of window system that Emacs is displaying through.
6907 The value is a symbol--for instance, `x' for X windows.
6908 The value is nil if Emacs is using a text-only terminal. */);
6910 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6911 doc
: /* The version number of the window system in use.
6912 For X windows, this is 10 or 11. */);
6914 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6915 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6917 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6918 doc
: /* Table defining how to output a glyph code to the frame.
6919 If not nil, this is a vector indexed by glyph code to define the glyph.
6920 Each element can be:
6921 integer: a glyph code which this glyph is an alias for.
6922 string: output this glyph using that string (not impl. in X windows).
6923 nil: this glyph mod 524288 is the code of a character to output,
6924 and this glyph / 524288 is the face number (see `face-id') to use
6925 while outputting it. */);
6926 Vglyph_table
= Qnil
;
6928 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6929 doc
: /* Display table to use for buffers that specify none.
6930 See `buffer-display-table' for more information. */);
6931 Vstandard_display_table
= Qnil
;
6933 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6934 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6935 redisplay_dont_pause
= 0;
6937 /* Initialize `window-system', unless init_display already decided it. */
6942 Vwindow_system
= Qnil
;
6943 Vwindow_system_version
= Qnil
;
6947 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6948 (do not change this comment) */