1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static void fake_current_matrices
P_ ((Lisp_Object
));
123 static void redraw_overlapping_rows
P_ ((struct window
*, int));
124 static void redraw_overlapped_rows
P_ ((struct window
*, int));
125 static int count_blanks
P_ ((struct glyph
*, int));
126 static int count_match
P_ ((struct glyph
*, struct glyph
*,
127 struct glyph
*, struct glyph
*));
128 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
129 static void update_frame_line
P_ ((struct frame
*, int));
130 static struct dim allocate_matrices_for_frame_redisplay
131 P_ ((Lisp_Object
, int, int, int, int *));
132 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
133 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
134 static void adjust_frame_glyphs
P_ ((struct frame
*));
135 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
136 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
137 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
138 int, int, struct dim
));
139 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
140 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
144 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
145 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
147 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
149 static struct glyph_pool
*new_glyph_pool
P_ ((void));
150 static void free_glyph_pool
P_ ((struct glyph_pool
*));
151 static void adjust_frame_glyphs_initially
P_ ((void));
152 static void adjust_frame_message_buffer
P_ ((struct frame
*));
153 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
154 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
155 static void build_frame_matrix
P_ ((struct frame
*));
156 void clear_current_matrices
P_ ((struct frame
*));
157 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
159 static void clear_window_matrices
P_ ((struct window
*, int));
160 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
161 static int scrolling_window
P_ ((struct window
*, int));
162 static int update_window_line
P_ ((struct window
*, int, int *));
163 static void update_marginal_area
P_ ((struct window
*, int, int));
164 static int update_text_area
P_ ((struct window
*, int));
165 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
167 static void mirror_make_current
P_ ((struct window
*, int));
168 void check_window_matrix_pointers
P_ ((struct window
*));
170 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
171 struct glyph_matrix
*));
173 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
174 static int update_window_tree
P_ ((struct window
*, int));
175 static int update_window
P_ ((struct window
*, int));
176 static int update_frame_1
P_ ((struct frame
*, int, int));
177 static void set_window_cursor_after_update
P_ ((struct window
*));
178 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
179 struct glyph_row
*, int));
180 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
181 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
182 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
183 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
184 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
185 struct window
*frame_row_to_window
P_ ((struct window
*, int));
188 /* Non-zero means don't pause redisplay for pending input. (This is
189 for debugging and for a future implementation of EDT-like
192 int redisplay_dont_pause
;
194 /* Nonzero upon entry to redisplay means do not assume anything about
195 current contents of actual terminal frame; clear and redraw it. */
199 /* Nonzero means last display completed. Zero means it was preempted. */
201 int display_completed
;
203 /* Lisp variable visible-bell; enables use of screen-flash instead of
208 /* Invert the color of the whole frame, at a low level. */
212 /* Line speed of the terminal. */
216 /* Either nil or a symbol naming the window system under which Emacs
217 creates the first frame. */
219 Lisp_Object Vinitial_window_system
;
221 /* Version number of X windows: 10, 11 or nil. */
223 Lisp_Object Vwindow_system_version
;
225 /* Vector of glyph definitions. Indexed by glyph number, the contents
226 are a string which is how to output the glyph.
228 If Vglyph_table is nil, a glyph is output by using its low 8 bits
231 This is an obsolete feature that is no longer used. The variable
232 is retained for compatibility. */
234 Lisp_Object Vglyph_table
;
236 /* Display table to use for vectors that don't specify their own. */
238 Lisp_Object Vstandard_display_table
;
240 /* Nonzero means reading single-character input with prompt so put
241 cursor on mini-buffer after the prompt. Positive means at end of
242 text in echo area; negative means at beginning of line. */
244 int cursor_in_echo_area
;
246 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
249 /* The currently selected frame. In a single-frame version, this
250 variable always equals the_only_frame. */
252 Lisp_Object selected_frame
;
254 /* A frame which is not just a mini-buffer, or 0 if there are no such
255 frames. This is usually the most recent such frame that was
256 selected. In a single-frame version, this variable always holds
257 the address of the_only_frame. */
259 struct frame
*last_nonminibuf_frame
;
261 /* 1 means SIGWINCH happened when not safe. */
263 int delayed_size_change
;
265 /* 1 means glyph initialization has been completed at startup. */
267 static int glyphs_initialized_initially_p
;
269 /* Updated window if != 0. Set by update_window. */
271 struct window
*updated_window
;
273 /* Glyph row updated in update_window_line, and area that is updated. */
275 struct glyph_row
*updated_row
;
278 /* A glyph for a space. */
280 struct glyph space_glyph
;
282 /* Non-zero means update has been performed directly, so that there's
283 no need for redisplay_internal to do much work. Set by
284 direct_output_for_insert. */
286 int redisplay_performed_directly_p
;
288 /* Counts of allocated structures. These counts serve to diagnose
289 memory leaks and double frees. */
291 int glyph_matrix_count
;
292 int glyph_pool_count
;
294 /* If non-null, the frame whose frame matrices are manipulated. If
295 null, window matrices are worked on. */
297 static struct frame
*frame_matrix_frame
;
299 /* Non-zero means that fonts have been loaded since the last glyph
300 matrix adjustments. Redisplay must stop, and glyph matrices must
301 be adjusted when this flag becomes non-zero during display. The
302 reason fonts can be loaded so late is that fonts of fontsets are
307 /* Convert vpos and hpos from frame to window and vice versa.
308 This may only be used for terminal frames. */
312 static int window_to_frame_vpos
P_ ((struct window
*, int));
313 static int window_to_frame_hpos
P_ ((struct window
*, int));
314 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
315 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
317 /* One element of the ring buffer containing redisplay history
320 struct redisplay_history
322 char trace
[512 + 100];
325 /* The size of the history buffer. */
327 #define REDISPLAY_HISTORY_SIZE 30
329 /* The redisplay history buffer. */
331 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
333 /* Next free entry in redisplay_history. */
335 static int history_idx
;
337 /* A tick that's incremented each time something is added to the
340 static unsigned history_tick
;
342 static void add_frame_display_history
P_ ((struct frame
*, int));
343 static void add_window_display_history
P_ ((struct window
*, char *, int));
346 /* Add to the redisplay history how window W has been displayed.
347 MSG is a trace containing the information how W's glyph matrix
348 has been constructed. PAUSED_P non-zero means that the update
349 has been interrupted for pending input. */
352 add_window_display_history (w
, msg
, paused_p
)
359 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
361 buf
= redisplay_history
[history_idx
].trace
;
364 sprintf (buf
, "%d: window %p (`%s')%s\n",
367 ((BUFFERP (w
->buffer
)
368 && STRINGP (XBUFFER (w
->buffer
)->name
))
369 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
371 paused_p
? " ***paused***" : "");
376 /* Add to the redisplay history that frame F has been displayed.
377 PAUSED_P non-zero means that the update has been interrupted for
381 add_frame_display_history (f
, paused_p
)
387 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
389 buf
= redisplay_history
[history_idx
].trace
;
392 sprintf (buf
, "%d: update frame %p%s",
394 f
, paused_p
? " ***paused***" : "");
398 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
399 Sdump_redisplay_history
, 0, 0, "",
400 doc
: /* Dump redisplay history to stderr. */)
405 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
408 i
= REDISPLAY_HISTORY_SIZE
- 1;
409 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
416 #else /* GLYPH_DEBUG == 0 */
418 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
419 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
421 #endif /* GLYPH_DEBUG == 0 */
424 /* Like bcopy except never gets confused by overlap. Let this be the
425 first function defined in this file, or change emacs.c where the
426 address of this function is used. */
429 safe_bcopy (from
, to
, size
)
434 if (size
<= 0 || from
== to
)
437 /* If the source and destination don't overlap, then bcopy can
438 handle it. If they do overlap, but the destination is lower in
439 memory than the source, we'll assume bcopy can handle that. */
440 if (to
< from
|| from
+ size
<= to
)
441 bcopy (from
, to
, size
);
443 /* Otherwise, we'll copy from the end. */
446 register const char *endf
= from
+ size
;
447 register char *endt
= to
+ size
;
449 /* If TO - FROM is large, then we should break the copy into
450 nonoverlapping chunks of TO - FROM bytes each. However, if
451 TO - FROM is small, then the bcopy function call overhead
452 makes this not worth it. The crossover point could be about
453 anywhere. Since I don't think the obvious copy loop is too
454 bad, I'm trying to err in its favor. */
459 while (endf
!= from
);
471 bcopy (endf
, endt
, to
- from
);
474 /* If SIZE wasn't a multiple of TO - FROM, there will be a
475 little left over. The amount left over is (endt + (to -
476 from)) - to, which is endt - from. */
477 bcopy (from
, to
, endt
- from
);
484 /***********************************************************************
486 ***********************************************************************/
488 /* Allocate and return a glyph_matrix structure. POOL is the glyph
489 pool from which memory for the matrix should be allocated, or null
490 for window-based redisplay where no glyph pools are used. The
491 member `pool' of the glyph matrix structure returned is set to
492 POOL, the structure is otherwise zeroed. */
494 struct glyph_matrix
*
495 new_glyph_matrix (pool
)
496 struct glyph_pool
*pool
;
498 struct glyph_matrix
*result
;
500 /* Allocate and clear. */
501 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
502 bzero (result
, sizeof *result
);
504 /* Increment number of allocated matrices. This count is used
505 to detect memory leaks. */
506 ++glyph_matrix_count
;
508 /* Set pool and return. */
514 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
516 The global counter glyph_matrix_count is decremented when a matrix
517 is freed. If the count gets negative, more structures were freed
518 than allocated, i.e. one matrix was freed more than once or a bogus
519 pointer was passed to this function.
521 If MATRIX->pool is null, this means that the matrix manages its own
522 glyph memory---this is done for matrices on X frames. Freeing the
523 matrix also frees the glyph memory in this case. */
526 free_glyph_matrix (matrix
)
527 struct glyph_matrix
*matrix
;
533 /* Detect the case that more matrices are freed than were
535 if (--glyph_matrix_count
< 0)
538 /* Free glyph memory if MATRIX owns it. */
539 if (matrix
->pool
== NULL
)
540 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
541 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
543 /* Free row structures and the matrix itself. */
544 xfree (matrix
->rows
);
550 /* Return the number of glyphs to reserve for a marginal area of
551 window W. TOTAL_GLYPHS is the number of glyphs in a complete
552 display line of window W. MARGIN gives the width of the marginal
553 area in canonical character units. MARGIN should be an integer
557 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
564 if (NUMBERP (margin
))
566 int width
= XFASTINT (w
->total_cols
);
567 double d
= max (0, XFLOATINT (margin
));
568 d
= min (width
/ 2 - 1, d
);
569 n
= (int) ((double) total_glyphs
/ width
* d
);
578 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
581 W is null if the function is called for a frame glyph matrix.
582 Otherwise it is the window MATRIX is a member of. X and Y are the
583 indices of the first column and row of MATRIX within the frame
584 matrix, if such a matrix exists. They are zero for purely
585 window-based redisplay. DIM is the needed size of the matrix.
587 In window-based redisplay, where no frame matrices exist, glyph
588 matrices manage their own glyph storage. Otherwise, they allocate
589 storage from a common frame glyph pool which can be found in
592 The reason for this memory management strategy is to avoid complete
593 frame redraws if possible. When we allocate from a common pool, a
594 change of the location or size of a sub-matrix within the pool
595 requires a complete redisplay of the frame because we cannot easily
596 make sure that the current matrices of all windows still agree with
597 what is displayed on the screen. While this is usually fast, it
598 leads to screen flickering. */
601 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
603 struct glyph_matrix
*matrix
;
609 int marginal_areas_changed_p
= 0;
610 int header_line_changed_p
= 0;
611 int header_line_p
= 0;
612 int left
= -1, right
= -1;
613 int window_width
= -1, window_height
;
615 /* See if W had a header line that has disappeared now, or vice versa.
619 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
621 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
622 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
624 matrix
->header_line_p
= header_line_p
;
626 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
627 Do nothing if MATRIX' size, position, vscroll, and marginal areas
628 haven't changed. This optimization is important because preserving
629 the matrix means preventing redisplay. */
630 if (matrix
->pool
== NULL
)
632 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
633 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
634 xassert (left
>= 0 && right
>= 0);
635 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
636 || right
!= matrix
->right_margin_glyphs
);
638 if (!marginal_areas_changed_p
640 && !header_line_changed_p
641 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
642 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
643 && matrix
->window_height
== window_height
644 && matrix
->window_vscroll
== w
->vscroll
645 && matrix
->window_width
== window_width
)
649 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
650 if (matrix
->rows_allocated
< dim
.height
)
652 int size
= dim
.height
* sizeof (struct glyph_row
);
653 new_rows
= dim
.height
- matrix
->rows_allocated
;
654 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
655 bzero (matrix
->rows
+ matrix
->rows_allocated
,
656 new_rows
* sizeof *matrix
->rows
);
657 matrix
->rows_allocated
= dim
.height
;
662 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
663 on a frame not using window-based redisplay. Set up pointers for
664 each row into the glyph pool. */
667 xassert (matrix
->pool
->glyphs
);
671 left
= margin_glyphs_to_reserve (w
, dim
.width
,
672 w
->left_margin_cols
);
673 right
= margin_glyphs_to_reserve (w
, dim
.width
,
674 w
->right_margin_cols
);
679 for (i
= 0; i
< dim
.height
; ++i
)
681 struct glyph_row
*row
= &matrix
->rows
[i
];
683 row
->glyphs
[LEFT_MARGIN_AREA
]
684 = (matrix
->pool
->glyphs
685 + (y
+ i
) * matrix
->pool
->ncolumns
689 || row
== matrix
->rows
+ dim
.height
- 1
690 || (row
== matrix
->rows
&& matrix
->header_line_p
))
692 row
->glyphs
[TEXT_AREA
]
693 = row
->glyphs
[LEFT_MARGIN_AREA
];
694 row
->glyphs
[RIGHT_MARGIN_AREA
]
695 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
696 row
->glyphs
[LAST_AREA
]
697 = row
->glyphs
[RIGHT_MARGIN_AREA
];
701 row
->glyphs
[TEXT_AREA
]
702 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
703 row
->glyphs
[RIGHT_MARGIN_AREA
]
704 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
705 row
->glyphs
[LAST_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
710 matrix
->left_margin_glyphs
= left
;
711 matrix
->right_margin_glyphs
= right
;
715 /* If MATRIX->pool is null, MATRIX is responsible for managing
716 its own memory. It is a window matrix for window-based redisplay.
717 Allocate glyph memory from the heap. */
718 if (dim
.width
> matrix
->matrix_w
720 || header_line_changed_p
721 || marginal_areas_changed_p
)
723 struct glyph_row
*row
= matrix
->rows
;
724 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
728 row
->glyphs
[LEFT_MARGIN_AREA
]
729 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
731 * sizeof (struct glyph
)));
733 /* The mode line never has marginal areas. */
734 if (row
== matrix
->rows
+ dim
.height
- 1
735 || (row
== matrix
->rows
&& matrix
->header_line_p
))
737 row
->glyphs
[TEXT_AREA
]
738 = row
->glyphs
[LEFT_MARGIN_AREA
];
739 row
->glyphs
[RIGHT_MARGIN_AREA
]
740 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
741 row
->glyphs
[LAST_AREA
]
742 = row
->glyphs
[RIGHT_MARGIN_AREA
];
746 row
->glyphs
[TEXT_AREA
]
747 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
748 row
->glyphs
[RIGHT_MARGIN_AREA
]
749 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
750 row
->glyphs
[LAST_AREA
]
751 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
757 xassert (left
>= 0 && right
>= 0);
758 matrix
->left_margin_glyphs
= left
;
759 matrix
->right_margin_glyphs
= right
;
762 /* Number of rows to be used by MATRIX. */
763 matrix
->nrows
= dim
.height
;
764 xassert (matrix
->nrows
>= 0);
768 if (matrix
== w
->current_matrix
)
770 /* Mark rows in a current matrix of a window as not having
771 valid contents. It's important to not do this for
772 desired matrices. When Emacs starts, it may already be
773 building desired matrices when this function runs. */
774 if (window_width
< 0)
775 window_width
= window_box_width (w
, -1);
777 /* Optimize the case that only the height has changed (C-x 2,
778 upper window). Invalidate all rows that are no longer part
780 if (!marginal_areas_changed_p
781 && !header_line_changed_p
783 && dim
.width
== matrix
->matrix_w
784 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
785 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
786 && matrix
->window_width
== window_width
)
788 /* Find the last row in the window. */
789 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
790 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
796 /* Window end is invalid, if inside of the rows that
797 are invalidated below. */
798 if (INTEGERP (w
->window_end_vpos
)
799 && XFASTINT (w
->window_end_vpos
) >= i
)
800 w
->window_end_valid
= Qnil
;
802 while (i
< matrix
->nrows
)
803 matrix
->rows
[i
++].enabled_p
= 0;
807 for (i
= 0; i
< matrix
->nrows
; ++i
)
808 matrix
->rows
[i
].enabled_p
= 0;
811 else if (matrix
== w
->desired_matrix
)
813 /* Rows in desired matrices always have to be cleared;
814 redisplay expects this is the case when it runs, so it
815 had better be the case when we adjust matrices between
817 for (i
= 0; i
< matrix
->nrows
; ++i
)
818 matrix
->rows
[i
].enabled_p
= 0;
823 /* Remember last values to be able to optimize frame redraws. */
824 matrix
->matrix_x
= x
;
825 matrix
->matrix_y
= y
;
826 matrix
->matrix_w
= dim
.width
;
827 matrix
->matrix_h
= dim
.height
;
829 /* Record the top y location and height of W at the time the matrix
830 was last adjusted. This is used to optimize redisplay above. */
833 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
834 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
835 matrix
->window_height
= window_height
;
836 matrix
->window_width
= window_width
;
837 matrix
->window_vscroll
= w
->vscroll
;
842 /* Reverse the contents of rows in MATRIX between START and END. The
843 contents of the row at END - 1 end up at START, END - 2 at START +
844 1 etc. This is part of the implementation of rotate_matrix (see
848 reverse_rows (matrix
, start
, end
)
849 struct glyph_matrix
*matrix
;
854 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
856 /* Non-ISO HP/UX compiler doesn't like auto struct
858 struct glyph_row temp
;
859 temp
= matrix
->rows
[i
];
860 matrix
->rows
[i
] = matrix
->rows
[j
];
861 matrix
->rows
[j
] = temp
;
866 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
867 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
868 indices. (Note: this does not copy glyphs, only glyph pointers in
869 row structures are moved around).
871 The algorithm used for rotating the vector was, I believe, first
872 described by Kernighan. See the vector R as consisting of two
873 sub-vectors AB, where A has length BY for BY >= 0. The result
874 after rotating is then BA. Reverse both sub-vectors to get ArBr
875 and reverse the result to get (ArBr)r which is BA. Similar for
879 rotate_matrix (matrix
, first
, last
, by
)
880 struct glyph_matrix
*matrix
;
885 /* Up (rotate left, i.e. towards lower indices). */
887 reverse_rows (matrix
, first
, first
+ by
);
888 reverse_rows (matrix
, first
+ by
, last
);
889 reverse_rows (matrix
, first
, last
);
893 /* Down (rotate right, i.e. towards higher indices). */
894 reverse_rows (matrix
, last
- by
, last
);
895 reverse_rows (matrix
, first
, last
- by
);
896 reverse_rows (matrix
, first
, last
);
901 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
902 with indices START <= index < END. Increment positions by DELTA/
906 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
907 struct glyph_matrix
*matrix
;
908 int start
, end
, delta
, delta_bytes
;
910 /* Check that START and END are reasonable values. */
911 xassert (start
>= 0 && start
<= matrix
->nrows
);
912 xassert (end
>= 0 && end
<= matrix
->nrows
);
913 xassert (start
<= end
);
915 for (; start
< end
; ++start
)
916 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
920 /* Enable a range of rows in glyph matrix MATRIX. START and END are
921 the row indices of the first and last + 1 row to enable. If
922 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
925 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
926 struct glyph_matrix
*matrix
;
930 xassert (start
<= end
);
931 xassert (start
>= 0 && start
< matrix
->nrows
);
932 xassert (end
>= 0 && end
<= matrix
->nrows
);
934 for (; start
< end
; ++start
)
935 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
941 This empties all rows in MATRIX by setting the enabled_p flag for
942 all rows of the matrix to zero. The function prepare_desired_row
943 will eventually really clear a row when it sees one with a zero
946 Resets update hints to defaults value. The only update hint
947 currently present is the flag MATRIX->no_scrolling_p. */
950 clear_glyph_matrix (matrix
)
951 struct glyph_matrix
*matrix
;
955 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
956 matrix
->no_scrolling_p
= 0;
961 /* Shift part of the glyph matrix MATRIX of window W up or down.
962 Increment y-positions in glyph rows between START and END by DY,
963 and recompute their visible height. */
966 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
968 struct glyph_matrix
*matrix
;
973 xassert (start
<= end
);
974 xassert (start
>= 0 && start
< matrix
->nrows
);
975 xassert (end
>= 0 && end
<= matrix
->nrows
);
977 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
978 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
980 for (; start
< end
; ++start
)
982 struct glyph_row
*row
= &matrix
->rows
[start
];
985 row
->visible_height
= row
->height
;
988 row
->visible_height
-= min_y
- row
->y
;
989 if (row
->y
+ row
->height
> max_y
)
990 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
995 /* Mark all rows in current matrices of frame F as invalid. Marking
996 invalid is done by setting enabled_p to zero for all rows in a
1000 clear_current_matrices (f
)
1001 register struct frame
*f
;
1003 /* Clear frame current matrix, if we have one. */
1004 if (f
->current_matrix
)
1005 clear_glyph_matrix (f
->current_matrix
);
1007 /* Clear the matrix of the menu bar window, if such a window exists.
1008 The menu bar window is currently used to display menus on X when
1009 no toolkit support is compiled in. */
1010 if (WINDOWP (f
->menu_bar_window
))
1011 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1013 /* Clear the matrix of the tool-bar window, if any. */
1014 if (WINDOWP (f
->tool_bar_window
))
1015 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1017 /* Clear current window matrices. */
1018 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1019 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1023 /* Clear out all display lines of F for a coming redisplay. */
1026 clear_desired_matrices (f
)
1027 register struct frame
*f
;
1029 if (f
->desired_matrix
)
1030 clear_glyph_matrix (f
->desired_matrix
);
1032 if (WINDOWP (f
->menu_bar_window
))
1033 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1035 if (WINDOWP (f
->tool_bar_window
))
1036 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1038 /* Do it for window matrices. */
1039 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1040 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1044 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1045 non-zero clear desired matrices, otherwise clear current matrices. */
1048 clear_window_matrices (w
, desired_p
)
1054 if (!NILP (w
->hchild
))
1056 xassert (WINDOWP (w
->hchild
));
1057 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1059 else if (!NILP (w
->vchild
))
1061 xassert (WINDOWP (w
->vchild
));
1062 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1067 clear_glyph_matrix (w
->desired_matrix
);
1070 clear_glyph_matrix (w
->current_matrix
);
1071 w
->window_end_valid
= Qnil
;
1075 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1081 /***********************************************************************
1084 See dispextern.h for an overall explanation of glyph rows.
1085 ***********************************************************************/
1087 /* Clear glyph row ROW. Do it in a way that makes it robust against
1088 changes in the glyph_row structure, i.e. addition or removal of
1089 structure members. */
1091 static struct glyph_row null_row
;
1094 clear_glyph_row (row
)
1095 struct glyph_row
*row
;
1097 struct glyph
*p
[1 + LAST_AREA
];
1099 /* Save pointers. */
1100 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1101 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1102 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1103 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1108 /* Restore pointers. */
1109 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1110 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1111 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1112 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1114 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1115 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1116 Redisplay outputs such glyphs, and flickering effects were
1117 the result. This also depended on the contents of memory
1118 returned by xmalloc. If flickering happens again, activate
1119 the code below. If the flickering is gone with that, chances
1120 are that the flickering has the same reason as here. */
1121 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1126 /* Make ROW an empty, enabled row of canonical character height,
1127 in window W starting at y-position Y. */
1130 blank_row (w
, row
, y
)
1132 struct glyph_row
*row
;
1137 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1138 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1140 clear_glyph_row (row
);
1142 row
->ascent
= row
->phys_ascent
= 0;
1143 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1144 row
->visible_height
= row
->height
;
1147 row
->visible_height
-= min_y
- row
->y
;
1148 if (row
->y
+ row
->height
> max_y
)
1149 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1155 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1156 are the amounts by which to change positions. Note that the first
1157 glyph of the text area of a row can have a buffer position even if
1158 the used count of the text area is zero. Such rows display line
1162 increment_row_positions (row
, delta
, delta_bytes
)
1163 struct glyph_row
*row
;
1164 int delta
, delta_bytes
;
1168 /* Increment start and end positions. */
1169 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1170 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1171 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1172 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1174 /* Increment positions in glyphs. */
1175 for (area
= 0; area
< LAST_AREA
; ++area
)
1176 for (i
= 0; i
< row
->used
[area
]; ++i
)
1177 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1178 && row
->glyphs
[area
][i
].charpos
> 0)
1179 row
->glyphs
[area
][i
].charpos
+= delta
;
1181 /* Capture the case of rows displaying a line end. */
1182 if (row
->used
[TEXT_AREA
] == 0
1183 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1184 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1189 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1190 contents, i.e. glyph structure contents are exchanged between A and
1191 B without changing glyph pointers in A and B. */
1194 swap_glyphs_in_rows (a
, b
)
1195 struct glyph_row
*a
, *b
;
1199 for (area
= 0; area
< LAST_AREA
; ++area
)
1201 /* Number of glyphs to swap. */
1202 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1204 /* Start of glyphs in area of row A. */
1205 struct glyph
*glyph_a
= a
->glyphs
[area
];
1207 /* End + 1 of glyphs in area of row A. */
1208 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1210 /* Start of glyphs in area of row B. */
1211 struct glyph
*glyph_b
= b
->glyphs
[area
];
1213 while (glyph_a
< glyph_a_end
)
1215 /* Non-ISO HP/UX compiler doesn't like auto struct
1219 *glyph_a
= *glyph_b
;
1229 /* Exchange pointers to glyph memory between glyph rows A and B. */
1232 swap_glyph_pointers (a
, b
)
1233 struct glyph_row
*a
, *b
;
1236 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1238 struct glyph
*temp
= a
->glyphs
[i
];
1239 a
->glyphs
[i
] = b
->glyphs
[i
];
1240 b
->glyphs
[i
] = temp
;
1245 /* Copy glyph row structure FROM to glyph row structure TO, except
1246 that glyph pointers in the structures are left unchanged. */
1249 copy_row_except_pointers (to
, from
)
1250 struct glyph_row
*to
, *from
;
1252 struct glyph
*pointers
[1 + LAST_AREA
];
1254 /* Save glyph pointers of TO. */
1255 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1257 /* Do a structure assignment. */
1260 /* Restore original pointers of TO. */
1261 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1265 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1266 TO and FROM are left unchanged. Glyph contents are copied from the
1267 glyph memory of FROM to the glyph memory of TO. Increment buffer
1268 positions in row TO by DELTA/ DELTA_BYTES. */
1271 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1272 struct glyph_row
*to
, *from
;
1273 int delta
, delta_bytes
;
1277 /* This is like a structure assignment TO = FROM, except that
1278 glyph pointers in the rows are left unchanged. */
1279 copy_row_except_pointers (to
, from
);
1281 /* Copy glyphs from FROM to TO. */
1282 for (area
= 0; area
< LAST_AREA
; ++area
)
1283 if (from
->used
[area
])
1284 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1285 from
->used
[area
] * sizeof (struct glyph
));
1287 /* Increment buffer positions in TO by DELTA. */
1288 increment_row_positions (to
, delta
, delta_bytes
);
1292 /* Assign glyph row FROM to glyph row TO. This works like a structure
1293 assignment TO = FROM, except that glyph pointers are not copied but
1294 exchanged between TO and FROM. Pointers must be exchanged to avoid
1298 assign_row (to
, from
)
1299 struct glyph_row
*to
, *from
;
1301 swap_glyph_pointers (to
, from
);
1302 copy_row_except_pointers (to
, from
);
1306 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1307 a row in a window matrix, is a slice of the glyph memory of the
1308 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1309 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1310 memory of FRAME_ROW. */
1315 glyph_row_slice_p (window_row
, frame_row
)
1316 struct glyph_row
*window_row
, *frame_row
;
1318 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1319 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1320 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1322 return (frame_glyph_start
<= window_glyph_start
1323 && window_glyph_start
< frame_glyph_end
);
1326 #endif /* GLYPH_DEBUG */
1330 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1331 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1332 in WINDOW_MATRIX is found satisfying the condition. */
1334 static struct glyph_row
*
1335 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1336 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1341 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1343 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1344 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1345 frame_matrix
->rows
+ row
))
1348 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1353 /* Prepare ROW for display. Desired rows are cleared lazily,
1354 i.e. they are only marked as to be cleared by setting their
1355 enabled_p flag to zero. When a row is to be displayed, a prior
1356 call to this function really clears it. */
1359 prepare_desired_row (row
)
1360 struct glyph_row
*row
;
1362 if (!row
->enabled_p
)
1364 clear_glyph_row (row
);
1370 /* Return a hash code for glyph row ROW. */
1373 line_hash_code (row
)
1374 struct glyph_row
*row
;
1380 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1381 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1385 int c
= glyph
->u
.ch
;
1386 int face_id
= glyph
->face_id
;
1387 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1389 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1390 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1402 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1403 the number of characters in the line. If must_write_spaces is
1404 zero, leading and trailing spaces are ignored. */
1407 line_draw_cost (matrix
, vpos
)
1408 struct glyph_matrix
*matrix
;
1411 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1412 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1413 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1415 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1416 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1418 /* Ignore trailing and leading spaces if we can. */
1419 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1421 /* Skip from the end over trailing spaces. */
1422 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1425 /* All blank line. */
1429 /* Skip over leading spaces. */
1430 while (CHAR_GLYPH_SPACE_P (*beg
))
1434 /* If we don't have a glyph-table, each glyph is one character,
1435 so return the number of glyphs. */
1436 if (glyph_table_base
== 0)
1440 /* Otherwise, scan the glyphs and accumulate their total length
1445 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1448 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1451 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1461 /* Test two glyph rows A and B for equality. Value is non-zero if A
1462 and B have equal contents. W is the window to which the glyphs
1463 rows A and B belong. It is needed here to test for partial row
1464 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1465 flags of A and B, too. */
1468 row_equal_p (w
, a
, b
, mouse_face_p
)
1470 struct glyph_row
*a
, *b
;
1475 else if (a
->hash
!= b
->hash
)
1479 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1482 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1485 /* Compare glyphs. */
1486 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1488 if (a
->used
[area
] != b
->used
[area
])
1491 a_glyph
= a
->glyphs
[area
];
1492 a_end
= a_glyph
+ a
->used
[area
];
1493 b_glyph
= b
->glyphs
[area
];
1495 while (a_glyph
< a_end
1496 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1497 ++a_glyph
, ++b_glyph
;
1499 if (a_glyph
!= a_end
)
1503 if (a
->fill_line_p
!= b
->fill_line_p
1504 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1505 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1506 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1507 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1508 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1509 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1510 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1511 || a
->overlapped_p
!= b
->overlapped_p
1512 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1513 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1514 /* Different partially visible characters on left margin. */
1516 /* Different height. */
1517 || a
->ascent
!= b
->ascent
1518 || a
->phys_ascent
!= b
->phys_ascent
1519 || a
->phys_height
!= b
->phys_height
1520 || a
->visible_height
!= b
->visible_height
)
1529 /***********************************************************************
1532 See dispextern.h for an overall explanation of glyph pools.
1533 ***********************************************************************/
1535 /* Allocate a glyph_pool structure. The structure returned is
1536 initialized with zeros. The global variable glyph_pool_count is
1537 incremented for each pool allocated. */
1539 static struct glyph_pool
*
1542 struct glyph_pool
*result
;
1544 /* Allocate a new glyph_pool and clear it. */
1545 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1546 bzero (result
, sizeof *result
);
1548 /* For memory leak and double deletion checking. */
1555 /* Free a glyph_pool structure POOL. The function may be called with
1556 a null POOL pointer. The global variable glyph_pool_count is
1557 decremented with every pool structure freed. If this count gets
1558 negative, more structures were freed than allocated, i.e. one
1559 structure must have been freed more than once or a bogus pointer
1560 was passed to free_glyph_pool. */
1563 free_glyph_pool (pool
)
1564 struct glyph_pool
*pool
;
1568 /* More freed than allocated? */
1570 xassert (glyph_pool_count
>= 0);
1572 xfree (pool
->glyphs
);
1578 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1579 columns we need. This function never shrinks a pool. The only
1580 case in which this would make sense, would be when a frame's size
1581 is changed from a large value to a smaller one. But, if someone
1582 does it once, we can expect that he will do it again.
1584 Value is non-zero if the pool changed in a way which makes
1585 re-adjusting window glyph matrices necessary. */
1588 realloc_glyph_pool (pool
, matrix_dim
)
1589 struct glyph_pool
*pool
;
1590 struct dim matrix_dim
;
1595 changed_p
= (pool
->glyphs
== 0
1596 || matrix_dim
.height
!= pool
->nrows
1597 || matrix_dim
.width
!= pool
->ncolumns
);
1599 /* Enlarge the glyph pool. */
1600 needed
= matrix_dim
.width
* matrix_dim
.height
;
1601 if (needed
> pool
->nglyphs
)
1603 int size
= needed
* sizeof (struct glyph
);
1606 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1609 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1610 bzero (pool
->glyphs
, size
);
1613 pool
->nglyphs
= needed
;
1616 /* Remember the number of rows and columns because (a) we use them
1617 to do sanity checks, and (b) the number of columns determines
1618 where rows in the frame matrix start---this must be available to
1619 determine pointers to rows of window sub-matrices. */
1620 pool
->nrows
= matrix_dim
.height
;
1621 pool
->ncolumns
= matrix_dim
.width
;
1628 /***********************************************************************
1630 ***********************************************************************/
1635 /* Flush standard output. This is sometimes useful to call from the debugger.
1636 XXX Maybe this should be changed to flush the current terminal instead of
1647 /* Check that no glyph pointers have been lost in MATRIX. If a
1648 pointer has been lost, e.g. by using a structure assignment between
1649 rows, at least one pointer must occur more than once in the rows of
1653 check_matrix_pointer_lossage (matrix
)
1654 struct glyph_matrix
*matrix
;
1658 for (i
= 0; i
< matrix
->nrows
; ++i
)
1659 for (j
= 0; j
< matrix
->nrows
; ++j
)
1661 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1662 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1666 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1669 matrix_row (matrix
, row
)
1670 struct glyph_matrix
*matrix
;
1673 xassert (matrix
&& matrix
->rows
);
1674 xassert (row
>= 0 && row
< matrix
->nrows
);
1676 /* That's really too slow for normal testing because this function
1677 is called almost everywhere. Although---it's still astonishingly
1678 fast, so it is valuable to have for debugging purposes. */
1680 check_matrix_pointer_lossage (matrix
);
1683 return matrix
->rows
+ row
;
1687 #if 0 /* This function makes invalid assumptions when text is
1688 partially invisible. But it might come handy for debugging
1691 /* Check invariants that must hold for an up to date current matrix of
1695 check_matrix_invariants (w
)
1698 struct glyph_matrix
*matrix
= w
->current_matrix
;
1699 int yb
= window_text_bottom_y (w
);
1700 struct glyph_row
*row
= matrix
->rows
;
1701 struct glyph_row
*last_text_row
= NULL
;
1702 struct buffer
*saved
= current_buffer
;
1703 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1706 /* This can sometimes happen for a fresh window. */
1707 if (matrix
->nrows
< 2)
1710 set_buffer_temp (buffer
);
1712 /* Note: last row is always reserved for the mode line. */
1713 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1714 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1716 struct glyph_row
*next
= row
+ 1;
1718 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1719 last_text_row
= row
;
1721 /* Check that character and byte positions are in sync. */
1722 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1723 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1725 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1726 have such a position temporarily in case of a minibuffer
1727 displaying something like `[Sole completion]' at its end. */
1728 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1729 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1730 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1732 /* Check that end position of `row' is equal to start position
1734 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1736 xassert (MATRIX_ROW_END_CHARPOS (row
)
1737 == MATRIX_ROW_START_CHARPOS (next
));
1738 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1739 == MATRIX_ROW_START_BYTEPOS (next
));
1744 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1745 xassert (w
->desired_matrix
->rows
!= NULL
);
1746 set_buffer_temp (saved
);
1751 #endif /* GLYPH_DEBUG != 0 */
1755 /**********************************************************************
1756 Allocating/ Adjusting Glyph Matrices
1757 **********************************************************************/
1759 /* Allocate glyph matrices over a window tree for a frame-based
1762 X and Y are column/row within the frame glyph matrix where
1763 sub-matrices for the window tree rooted at WINDOW must be
1764 allocated. CH_DIM contains the dimensions of the smallest
1765 character that could be used during display. DIM_ONLY_P non-zero
1766 means that the caller of this function is only interested in the
1767 result matrix dimension, and matrix adjustments should not be
1770 The function returns the total width/height of the sub-matrices of
1771 the window tree. If called on a frame root window, the computation
1772 will take the mini-buffer window into account.
1774 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1776 NEW_LEAF_MATRIX set if any window in the tree did not have a
1777 glyph matrices yet, and
1779 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1780 any window in the tree will be changed or have been changed (see
1783 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1786 Windows are arranged into chains of windows on the same level
1787 through the next fields of window structures. Such a level can be
1788 either a sequence of horizontally adjacent windows from left to
1789 right, or a sequence of vertically adjacent windows from top to
1790 bottom. Each window in a horizontal sequence can be either a leaf
1791 window or a vertical sequence; a window in a vertical sequence can
1792 be either a leaf or a horizontal sequence. All windows in a
1793 horizontal sequence have the same height, and all windows in a
1794 vertical sequence have the same width.
1796 This function uses, for historical reasons, a more general
1797 algorithm to determine glyph matrix dimensions that would be
1800 The matrix height of a horizontal sequence is determined by the
1801 maximum height of any matrix in the sequence. The matrix width of
1802 a horizontal sequence is computed by adding up matrix widths of
1803 windows in the sequence.
1805 |<------- result width ------->|
1806 +---------+----------+---------+ ---
1809 +---------+ | | result height
1814 The matrix width of a vertical sequence is the maximum matrix width
1815 of any window in the sequence. Its height is computed by adding up
1816 matrix heights of windows in the sequence.
1818 |<---- result width -->|
1826 +------------+---------+ |
1829 +------------+---------+ --- */
1831 /* Bit indicating that a new matrix will be allocated or has been
1834 #define NEW_LEAF_MATRIX (1 << 0)
1836 /* Bit indicating that a matrix will or has changed its location or
1839 #define CHANGED_LEAF_MATRIX (1 << 1)
1842 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1843 window_change_flags
)
1847 int *window_change_flags
;
1849 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1851 int wmax
= 0, hmax
= 0;
1855 int in_horz_combination_p
;
1857 /* What combination is WINDOW part of? Compute this once since the
1858 result is the same for all windows in the `next' chain. The
1859 special case of a root window (parent equal to nil) is treated
1860 like a vertical combination because a root window's `next'
1861 points to the mini-buffer window, if any, which is arranged
1862 vertically below other windows. */
1863 in_horz_combination_p
1864 = (!NILP (XWINDOW (window
)->parent
)
1865 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1867 /* For WINDOW and all windows on the same level. */
1870 w
= XWINDOW (window
);
1872 /* Get the dimension of the window sub-matrix for W, depending
1873 on whether this is a combination or a leaf window. */
1874 if (!NILP (w
->hchild
))
1875 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1877 window_change_flags
);
1878 else if (!NILP (w
->vchild
))
1879 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1881 window_change_flags
);
1884 /* If not already done, allocate sub-matrix structures. */
1885 if (w
->desired_matrix
== NULL
)
1887 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1888 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1889 *window_change_flags
|= NEW_LEAF_MATRIX
;
1892 /* Width and height MUST be chosen so that there are no
1893 holes in the frame matrix. */
1894 dim
.width
= required_matrix_width (w
);
1895 dim
.height
= required_matrix_height (w
);
1897 /* Will matrix be re-allocated? */
1898 if (x
!= w
->desired_matrix
->matrix_x
1899 || y
!= w
->desired_matrix
->matrix_y
1900 || dim
.width
!= w
->desired_matrix
->matrix_w
1901 || dim
.height
!= w
->desired_matrix
->matrix_h
1902 || (margin_glyphs_to_reserve (w
, dim
.width
,
1903 w
->left_margin_cols
)
1904 != w
->desired_matrix
->left_margin_glyphs
)
1905 || (margin_glyphs_to_reserve (w
, dim
.width
,
1906 w
->right_margin_cols
)
1907 != w
->desired_matrix
->right_margin_glyphs
))
1908 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1910 /* Actually change matrices, if allowed. Do not consider
1911 CHANGED_LEAF_MATRIX computed above here because the pool
1912 may have been changed which we don't now here. We trust
1913 that we only will be called with DIM_ONLY_P != 0 when
1917 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1918 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1922 /* If we are part of a horizontal combination, advance x for
1923 windows to the right of W; otherwise advance y for windows
1925 if (in_horz_combination_p
)
1930 /* Remember maximum glyph matrix dimensions. */
1931 wmax
= max (wmax
, dim
.width
);
1932 hmax
= max (hmax
, dim
.height
);
1934 /* Next window on same level. */
1937 while (!NILP (window
));
1939 /* Set `total' to the total glyph matrix dimension of this window
1940 level. In a vertical combination, the width is the width of the
1941 widest window; the height is the y we finally reached, corrected
1942 by the y we started with. In a horizontal combination, the total
1943 height is the height of the tallest window, and the width is the
1944 x we finally reached, corrected by the x we started with. */
1945 if (in_horz_combination_p
)
1947 total
.width
= x
- x0
;
1948 total
.height
= hmax
;
1953 total
.height
= y
- y0
;
1960 /* Return the required height of glyph matrices for window W. */
1963 required_matrix_height (w
)
1966 #ifdef HAVE_WINDOW_SYSTEM
1967 struct frame
*f
= XFRAME (w
->frame
);
1969 if (FRAME_WINDOW_P (f
))
1971 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1972 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1973 return (((window_pixel_height
+ ch_height
- 1)
1974 / ch_height
) * w
->nrows_scale_factor
1975 /* One partially visible line at the top and
1976 bottom of the window. */
1978 /* 2 for header and mode line. */
1981 #endif /* HAVE_WINDOW_SYSTEM */
1983 return WINDOW_TOTAL_LINES (w
);
1987 /* Return the required width of glyph matrices for window W. */
1990 required_matrix_width (w
)
1993 #ifdef HAVE_WINDOW_SYSTEM
1994 struct frame
*f
= XFRAME (w
->frame
);
1995 if (FRAME_WINDOW_P (f
))
1997 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1998 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2000 /* Compute number of glyphs needed in a glyph row. */
2001 return (((window_pixel_width
+ ch_width
- 1)
2002 / ch_width
) * w
->ncols_scale_factor
2003 /* 2 partially visible columns in the text area. */
2005 /* One partially visible column at the right
2006 edge of each marginal area. */
2009 #endif /* HAVE_WINDOW_SYSTEM */
2011 return XINT (w
->total_cols
);
2015 /* Allocate window matrices for window-based redisplay. W is the
2016 window whose matrices must be allocated/reallocated. CH_DIM is the
2017 size of the smallest character that could potentially be used on W. */
2020 allocate_matrices_for_window_redisplay (w
)
2025 if (!NILP (w
->vchild
))
2026 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2027 else if (!NILP (w
->hchild
))
2028 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2031 /* W is a leaf window. */
2034 /* If matrices are not yet allocated, allocate them now. */
2035 if (w
->desired_matrix
== NULL
)
2037 w
->desired_matrix
= new_glyph_matrix (NULL
);
2038 w
->current_matrix
= new_glyph_matrix (NULL
);
2041 dim
.width
= required_matrix_width (w
);
2042 dim
.height
= required_matrix_height (w
);
2043 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2044 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2047 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2052 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2053 do it for all frames; otherwise do it just for the given frame.
2054 This function must be called when a new frame is created, its size
2055 changes, or its window configuration changes. */
2061 /* Block input so that expose events and other events that access
2062 glyph matrices are not processed while we are changing them. */
2066 adjust_frame_glyphs (f
);
2069 Lisp_Object tail
, lisp_frame
;
2071 FOR_EACH_FRAME (tail
, lisp_frame
)
2072 adjust_frame_glyphs (XFRAME (lisp_frame
));
2079 /* Adjust frame glyphs when Emacs is initialized.
2081 To be called from init_display.
2083 We need a glyph matrix because redraw will happen soon.
2084 Unfortunately, window sizes on selected_frame are not yet set to
2085 meaningful values. I believe we can assume that there are only two
2086 windows on the frame---the mini-buffer and the root window. Frame
2087 height and width seem to be correct so far. So, set the sizes of
2088 windows to estimated values. */
2091 adjust_frame_glyphs_initially ()
2093 struct frame
*sf
= SELECTED_FRAME ();
2094 struct window
*root
= XWINDOW (sf
->root_window
);
2095 struct window
*mini
= XWINDOW (root
->next
);
2096 int frame_lines
= FRAME_LINES (sf
);
2097 int frame_cols
= FRAME_COLS (sf
);
2098 int top_margin
= FRAME_TOP_MARGIN (sf
);
2100 /* Do it for the root window. */
2101 XSETFASTINT (root
->top_line
, top_margin
);
2102 XSETFASTINT (root
->total_cols
, frame_cols
);
2103 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2105 /* Do it for the mini-buffer window. */
2106 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2107 XSETFASTINT (mini
->total_cols
, frame_cols
);
2108 set_window_height (root
->next
, 1, 0);
2110 adjust_frame_glyphs (sf
);
2111 glyphs_initialized_initially_p
= 1;
2115 /* Allocate/reallocate glyph matrices of a single frame F. */
2118 adjust_frame_glyphs (f
)
2121 if (FRAME_WINDOW_P (f
))
2122 adjust_frame_glyphs_for_window_redisplay (f
);
2124 adjust_frame_glyphs_for_frame_redisplay (f
);
2126 /* Don't forget the message buffer and the buffer for
2127 decode_mode_spec. */
2128 adjust_frame_message_buffer (f
);
2129 adjust_decode_mode_spec_buffer (f
);
2131 f
->glyphs_initialized_p
= 1;
2135 /* In the window tree with root W, build current matrices of leaf
2136 windows from the frame's current matrix. */
2139 fake_current_matrices (window
)
2144 for (; !NILP (window
); window
= w
->next
)
2146 w
= XWINDOW (window
);
2148 if (!NILP (w
->hchild
))
2149 fake_current_matrices (w
->hchild
);
2150 else if (!NILP (w
->vchild
))
2151 fake_current_matrices (w
->vchild
);
2155 struct frame
*f
= XFRAME (w
->frame
);
2156 struct glyph_matrix
*m
= w
->current_matrix
;
2157 struct glyph_matrix
*fm
= f
->current_matrix
;
2159 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2160 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2162 for (i
= 0; i
< m
->matrix_h
; ++i
)
2164 struct glyph_row
*r
= m
->rows
+ i
;
2165 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2167 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2168 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2170 r
->enabled_p
= fr
->enabled_p
;
2173 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2174 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2175 r
->used
[TEXT_AREA
] = (m
->matrix_w
2176 - r
->used
[LEFT_MARGIN_AREA
]
2177 - r
->used
[RIGHT_MARGIN_AREA
]);
2186 /* Save away the contents of frame F's current frame matrix. Value is
2187 a glyph matrix holding the contents of F's current frame matrix. */
2189 static struct glyph_matrix
*
2190 save_current_matrix (f
)
2194 struct glyph_matrix
*saved
;
2196 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2197 bzero (saved
, sizeof *saved
);
2198 saved
->nrows
= f
->current_matrix
->nrows
;
2199 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2200 * sizeof *saved
->rows
);
2201 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2203 for (i
= 0; i
< saved
->nrows
; ++i
)
2205 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2206 struct glyph_row
*to
= saved
->rows
+ i
;
2207 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2208 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2209 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2210 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2217 /* Restore the contents of frame F's current frame matrix from SAVED,
2218 and free memory associated with SAVED. */
2221 restore_current_matrix (f
, saved
)
2223 struct glyph_matrix
*saved
;
2227 for (i
= 0; i
< saved
->nrows
; ++i
)
2229 struct glyph_row
*from
= saved
->rows
+ i
;
2230 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2231 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2232 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2233 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2234 xfree (from
->glyphs
[TEXT_AREA
]);
2237 xfree (saved
->rows
);
2243 /* Allocate/reallocate glyph matrices of a single frame F for
2244 frame-based redisplay. */
2247 adjust_frame_glyphs_for_frame_redisplay (f
)
2251 struct dim matrix_dim
;
2253 int window_change_flags
;
2256 if (!FRAME_LIVE_P (f
))
2259 /* Determine the smallest character in any font for F. On
2260 console windows, all characters have dimension (1, 1). */
2261 ch_dim
.width
= ch_dim
.height
= 1;
2263 top_window_y
= FRAME_TOP_MARGIN (f
);
2265 /* Allocate glyph pool structures if not already done. */
2266 if (f
->desired_pool
== NULL
)
2268 f
->desired_pool
= new_glyph_pool ();
2269 f
->current_pool
= new_glyph_pool ();
2272 /* Allocate frames matrix structures if needed. */
2273 if (f
->desired_matrix
== NULL
)
2275 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2276 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2279 /* Compute window glyph matrices. (This takes the mini-buffer
2280 window into account). The result is the size of the frame glyph
2281 matrix needed. The variable window_change_flags is set to a bit
2282 mask indicating whether new matrices will be allocated or
2283 existing matrices change their size or location within the frame
2285 window_change_flags
= 0;
2287 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2290 &window_change_flags
);
2292 /* Add in menu bar lines, if any. */
2293 matrix_dim
.height
+= top_window_y
;
2295 /* Enlarge pools as necessary. */
2296 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2297 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2299 /* Set up glyph pointers within window matrices. Do this only if
2300 absolutely necessary since it requires a frame redraw. */
2301 if (pool_changed_p
|| window_change_flags
)
2303 /* Do it for window matrices. */
2304 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2306 &window_change_flags
);
2308 /* Size of frame matrices must equal size of frame. Note
2309 that we are called for X frames with window widths NOT equal
2310 to the frame width (from CHANGE_FRAME_SIZE_1). */
2311 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2312 && matrix_dim
.height
== FRAME_LINES (f
));
2314 /* Pointers to glyph memory in glyph rows are exchanged during
2315 the update phase of redisplay, which means in general that a
2316 frame's current matrix consists of pointers into both the
2317 desired and current glyph pool of the frame. Adjusting a
2318 matrix sets the frame matrix up so that pointers are all into
2319 the same pool. If we want to preserve glyph contents of the
2320 current matrix over a call to adjust_glyph_matrix, we must
2321 make a copy of the current glyphs, and restore the current
2322 matrix' contents from that copy. */
2323 if (display_completed
2324 && !FRAME_GARBAGED_P (f
)
2325 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2326 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2328 struct glyph_matrix
*copy
= save_current_matrix (f
);
2329 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2330 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2331 restore_current_matrix (f
, copy
);
2332 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2336 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2337 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2338 SET_FRAME_GARBAGED (f
);
2344 /* Allocate/reallocate glyph matrices of a single frame F for
2345 window-based redisplay. */
2348 adjust_frame_glyphs_for_window_redisplay (f
)
2354 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2356 /* Get minimum sizes. */
2357 #ifdef HAVE_WINDOW_SYSTEM
2358 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2359 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2361 ch_dim
.width
= ch_dim
.height
= 1;
2364 /* Allocate/reallocate window matrices. */
2365 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2367 /* Allocate/ reallocate matrices of the dummy window used to display
2368 the menu bar under X when no X toolkit support is available. */
2369 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2371 /* Allocate a dummy window if not already done. */
2372 if (NILP (f
->menu_bar_window
))
2374 f
->menu_bar_window
= make_window ();
2375 w
= XWINDOW (f
->menu_bar_window
);
2376 XSETFRAME (w
->frame
, f
);
2377 w
->pseudo_window_p
= 1;
2380 w
= XWINDOW (f
->menu_bar_window
);
2382 /* Set window dimensions to frame dimensions and allocate or
2383 adjust glyph matrices of W. */
2384 XSETFASTINT (w
->top_line
, 0);
2385 XSETFASTINT (w
->left_col
, 0);
2386 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2387 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2388 allocate_matrices_for_window_redisplay (w
);
2390 #endif /* not USE_X_TOOLKIT */
2393 /* Allocate/ reallocate matrices of the tool bar window. If we
2394 don't have a tool bar window yet, make one. */
2395 if (NILP (f
->tool_bar_window
))
2397 f
->tool_bar_window
= make_window ();
2398 w
= XWINDOW (f
->tool_bar_window
);
2399 XSETFRAME (w
->frame
, f
);
2400 w
->pseudo_window_p
= 1;
2403 w
= XWINDOW (f
->tool_bar_window
);
2405 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2406 XSETFASTINT (w
->left_col
, 0);
2407 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2408 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2409 allocate_matrices_for_window_redisplay (w
);
2414 /* Adjust/ allocate message buffer of frame F.
2416 Note that the message buffer is never freed. Since I could not
2417 find a free in 19.34, I assume that freeing it would be
2418 problematic in some way and don't do it either.
2420 (Implementation note: It should be checked if we can free it
2421 eventually without causing trouble). */
2424 adjust_frame_message_buffer (f
)
2427 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2429 if (FRAME_MESSAGE_BUF (f
))
2431 char *buffer
= FRAME_MESSAGE_BUF (f
);
2432 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2433 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2436 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2440 /* Re-allocate buffer for decode_mode_spec on frame F. */
2443 adjust_decode_mode_spec_buffer (f
)
2446 f
->decode_mode_spec_buffer
2447 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2448 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2453 /**********************************************************************
2454 Freeing Glyph Matrices
2455 **********************************************************************/
2457 /* Free glyph memory for a frame F. F may be null. This function can
2458 be called for the same frame more than once. The root window of
2459 F may be nil when this function is called. This is the case when
2460 the function is called when F is destroyed. */
2466 if (f
&& f
->glyphs_initialized_p
)
2468 /* Block interrupt input so that we don't get surprised by an X
2469 event while we're in an inconsistent state. */
2471 f
->glyphs_initialized_p
= 0;
2473 /* Release window sub-matrices. */
2474 if (!NILP (f
->root_window
))
2475 free_window_matrices (XWINDOW (f
->root_window
));
2477 /* Free the dummy window for menu bars without X toolkit and its
2479 if (!NILP (f
->menu_bar_window
))
2481 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2482 free_glyph_matrix (w
->desired_matrix
);
2483 free_glyph_matrix (w
->current_matrix
);
2484 w
->desired_matrix
= w
->current_matrix
= NULL
;
2485 f
->menu_bar_window
= Qnil
;
2488 /* Free the tool bar window and its glyph matrices. */
2489 if (!NILP (f
->tool_bar_window
))
2491 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2492 free_glyph_matrix (w
->desired_matrix
);
2493 free_glyph_matrix (w
->current_matrix
);
2494 w
->desired_matrix
= w
->current_matrix
= NULL
;
2495 f
->tool_bar_window
= Qnil
;
2498 /* Release frame glyph matrices. Reset fields to zero in
2499 case we are called a second time. */
2500 if (f
->desired_matrix
)
2502 free_glyph_matrix (f
->desired_matrix
);
2503 free_glyph_matrix (f
->current_matrix
);
2504 f
->desired_matrix
= f
->current_matrix
= NULL
;
2507 /* Release glyph pools. */
2508 if (f
->desired_pool
)
2510 free_glyph_pool (f
->desired_pool
);
2511 free_glyph_pool (f
->current_pool
);
2512 f
->desired_pool
= f
->current_pool
= NULL
;
2520 /* Free glyph sub-matrices in the window tree rooted at W. This
2521 function may be called with a null pointer, and it may be called on
2522 the same tree more than once. */
2525 free_window_matrices (w
)
2530 if (!NILP (w
->hchild
))
2531 free_window_matrices (XWINDOW (w
->hchild
));
2532 else if (!NILP (w
->vchild
))
2533 free_window_matrices (XWINDOW (w
->vchild
));
2536 /* This is a leaf window. Free its memory and reset fields
2537 to zero in case this function is called a second time for
2539 free_glyph_matrix (w
->current_matrix
);
2540 free_glyph_matrix (w
->desired_matrix
);
2541 w
->current_matrix
= w
->desired_matrix
= NULL
;
2544 /* Next window on same level. */
2545 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2550 /* Check glyph memory leaks. This function is called from
2551 shut_down_emacs. Note that frames are not destroyed when Emacs
2552 exits. We therefore free all glyph memory for all active frames
2553 explicitly and check that nothing is left allocated. */
2556 check_glyph_memory ()
2558 Lisp_Object tail
, frame
;
2560 /* Free glyph memory for all frames. */
2561 FOR_EACH_FRAME (tail
, frame
)
2562 free_glyphs (XFRAME (frame
));
2564 /* Check that nothing is left allocated. */
2565 if (glyph_matrix_count
)
2567 if (glyph_pool_count
)
2573 /**********************************************************************
2574 Building a Frame Matrix
2575 **********************************************************************/
2577 /* Most of the redisplay code works on glyph matrices attached to
2578 windows. This is a good solution most of the time, but it is not
2579 suitable for terminal code. Terminal output functions cannot rely
2580 on being able to set an arbitrary terminal window. Instead they
2581 must be provided with a view of the whole frame, i.e. the whole
2582 screen. We build such a view by constructing a frame matrix from
2583 window matrices in this section.
2585 Windows that must be updated have their must_be_update_p flag set.
2586 For all such windows, their desired matrix is made part of the
2587 desired frame matrix. For other windows, their current matrix is
2588 made part of the desired frame matrix.
2590 +-----------------+----------------+
2591 | desired | desired |
2593 +-----------------+----------------+
2596 +----------------------------------+
2598 Desired window matrices can be made part of the frame matrix in a
2599 cheap way: We exploit the fact that the desired frame matrix and
2600 desired window matrices share their glyph memory. This is not
2601 possible for current window matrices. Their glyphs are copied to
2602 the desired frame matrix. The latter is equivalent to
2603 preserve_other_columns in the old redisplay.
2605 Used glyphs counters for frame matrix rows are the result of adding
2606 up glyph lengths of the window matrices. A line in the frame
2607 matrix is enabled, if a corresponding line in a window matrix is
2610 After building the desired frame matrix, it will be passed to
2611 terminal code, which will manipulate both the desired and current
2612 frame matrix. Changes applied to the frame's current matrix have
2613 to be visible in current window matrices afterwards, of course.
2615 This problem is solved like this:
2617 1. Window and frame matrices share glyphs. Window matrices are
2618 constructed in a way that their glyph contents ARE the glyph
2619 contents needed in a frame matrix. Thus, any modification of
2620 glyphs done in terminal code will be reflected in window matrices
2623 2. Exchanges of rows in a frame matrix done by terminal code are
2624 intercepted by hook functions so that corresponding row operations
2625 on window matrices can be performed. This is necessary because we
2626 use pointers to glyphs in glyph row structures. To satisfy the
2627 assumption of point 1 above that glyphs are updated implicitly in
2628 window matrices when they are manipulated via the frame matrix,
2629 window and frame matrix must of course agree where to find the
2630 glyphs for their rows. Possible manipulations that must be
2631 mirrored are assignments of rows of the desired frame matrix to the
2632 current frame matrix and scrolling the current frame matrix. */
2634 /* Build frame F's desired matrix from window matrices. Only windows
2635 which have the flag must_be_updated_p set have to be updated. Menu
2636 bar lines of a frame are not covered by window matrices, so make
2637 sure not to touch them in this function. */
2640 build_frame_matrix (f
)
2645 /* F must have a frame matrix when this function is called. */
2646 xassert (!FRAME_WINDOW_P (f
));
2648 /* Clear all rows in the frame matrix covered by window matrices.
2649 Menu bar lines are not covered by windows. */
2650 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2651 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2653 /* Build the matrix by walking the window tree. */
2654 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2655 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2659 /* Walk a window tree, building a frame matrix MATRIX from window
2660 matrices. W is the root of a window tree. */
2663 build_frame_matrix_from_window_tree (matrix
, w
)
2664 struct glyph_matrix
*matrix
;
2669 if (!NILP (w
->hchild
))
2670 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2671 else if (!NILP (w
->vchild
))
2672 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2674 build_frame_matrix_from_leaf_window (matrix
, w
);
2676 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2681 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2682 desired frame matrix built. W is a leaf window whose desired or
2683 current matrix is to be added to FRAME_MATRIX. W's flag
2684 must_be_updated_p determines which matrix it contributes to
2685 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2686 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2687 Adding a desired matrix means setting up used counters and such in
2688 frame rows, while adding a current window matrix to FRAME_MATRIX
2689 means copying glyphs. The latter case corresponds to
2690 preserve_other_columns in the old redisplay. */
2693 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2694 struct glyph_matrix
*frame_matrix
;
2697 struct glyph_matrix
*window_matrix
;
2698 int window_y
, frame_y
;
2699 /* If non-zero, a glyph to insert at the right border of W. */
2700 GLYPH right_border_glyph
= 0;
2702 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2703 if (w
->must_be_updated_p
)
2705 window_matrix
= w
->desired_matrix
;
2707 /* Decide whether we want to add a vertical border glyph. */
2708 if (!WINDOW_RIGHTMOST_P (w
))
2710 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2711 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2712 ? XINT (DISP_BORDER_GLYPH (dp
))
2717 window_matrix
= w
->current_matrix
;
2719 /* For all rows in the window matrix and corresponding rows in the
2722 frame_y
= window_matrix
->matrix_y
;
2723 while (window_y
< window_matrix
->nrows
)
2725 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2726 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2727 int current_row_p
= window_matrix
== w
->current_matrix
;
2729 /* Fill up the frame row with spaces up to the left margin of the
2731 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2733 /* Fill up areas in the window matrix row with spaces. */
2734 fill_up_glyph_row_with_spaces (window_row
);
2736 /* If only part of W's desired matrix has been built, and
2737 window_row wasn't displayed, use the corresponding current
2739 if (window_matrix
== w
->desired_matrix
2740 && !window_row
->enabled_p
)
2742 window_row
= w
->current_matrix
->rows
+ window_y
;
2748 /* Copy window row to frame row. */
2749 bcopy (window_row
->glyphs
[0],
2750 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2751 window_matrix
->matrix_w
* sizeof (struct glyph
));
2755 xassert (window_row
->enabled_p
);
2757 /* Only when a desired row has been displayed, we want
2758 the corresponding frame row to be updated. */
2759 frame_row
->enabled_p
= 1;
2761 /* Maybe insert a vertical border between horizontally adjacent
2763 if (right_border_glyph
)
2765 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2766 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2770 /* Window row window_y must be a slice of frame row
2772 xassert (glyph_row_slice_p (window_row
, frame_row
));
2774 /* If rows are in sync, we don't have to copy glyphs because
2775 frame and window share glyphs. */
2777 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2778 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2782 /* Set number of used glyphs in the frame matrix. Since we fill
2783 up with spaces, and visit leaf windows from left to right it
2784 can be done simply. */
2785 frame_row
->used
[TEXT_AREA
]
2786 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2795 /* Add spaces to a glyph row ROW in a window matrix.
2797 Each row has the form:
2799 +---------+-----------------------------+------------+
2800 | left | text | right |
2801 +---------+-----------------------------+------------+
2803 Left and right marginal areas are optional. This function adds
2804 spaces to areas so that there are no empty holes between areas.
2805 In other words: If the right area is not empty, the text area
2806 is filled up with spaces up to the right area. If the text area
2807 is not empty, the left area is filled up.
2809 To be called for frame-based redisplay, only. */
2812 fill_up_glyph_row_with_spaces (row
)
2813 struct glyph_row
*row
;
2815 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2816 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2817 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2821 /* Fill area AREA of glyph row ROW with spaces. To be called for
2822 frame-based redisplay only. */
2825 fill_up_glyph_row_area_with_spaces (row
, area
)
2826 struct glyph_row
*row
;
2829 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2831 struct glyph
*end
= row
->glyphs
[area
+ 1];
2832 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2835 *text
++ = space_glyph
;
2836 row
->used
[area
] = text
- row
->glyphs
[area
];
2841 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2842 reached. In frame matrices only one area, TEXT_AREA, is used. */
2845 fill_up_frame_row_with_spaces (row
, upto
)
2846 struct glyph_row
*row
;
2849 int i
= row
->used
[TEXT_AREA
];
2850 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2853 glyph
[i
++] = space_glyph
;
2855 row
->used
[TEXT_AREA
] = i
;
2860 /**********************************************************************
2861 Mirroring operations on frame matrices in window matrices
2862 **********************************************************************/
2864 /* Set frame being updated via frame-based redisplay to F. This
2865 function must be called before updates to make explicit that we are
2866 working on frame matrices or not. */
2869 set_frame_matrix_frame (f
)
2872 frame_matrix_frame
= f
;
2876 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2877 DESIRED_MATRIX is the desired matrix corresponding to
2878 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2879 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2880 frame_matrix_frame is non-null, this indicates that the exchange is
2881 done in frame matrices, and that we have to perform analogous
2882 operations in window matrices of frame_matrix_frame. */
2885 make_current (desired_matrix
, current_matrix
, row
)
2886 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2889 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2890 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2891 int mouse_face_p
= current_row
->mouse_face_p
;
2893 /* Do current_row = desired_row. This exchanges glyph pointers
2894 between both rows, and does a structure assignment otherwise. */
2895 assign_row (current_row
, desired_row
);
2897 /* Enable current_row to mark it as valid. */
2898 current_row
->enabled_p
= 1;
2899 current_row
->mouse_face_p
= mouse_face_p
;
2901 /* If we are called on frame matrices, perform analogous operations
2902 for window matrices. */
2903 if (frame_matrix_frame
)
2904 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2908 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2909 W's frame which has been made current (by swapping pointers between
2910 current and desired matrix). Perform analogous operations in the
2911 matrices of leaf windows in the window tree rooted at W. */
2914 mirror_make_current (w
, frame_row
)
2920 if (!NILP (w
->hchild
))
2921 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2922 else if (!NILP (w
->vchild
))
2923 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2926 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2927 here because the checks performed in debug mode there
2928 will not allow the conversion. */
2929 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2931 /* If FRAME_ROW is within W, assign the desired row to the
2932 current row (exchanging glyph pointers). */
2933 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2935 struct glyph_row
*current_row
2936 = MATRIX_ROW (w
->current_matrix
, row
);
2937 struct glyph_row
*desired_row
2938 = MATRIX_ROW (w
->desired_matrix
, row
);
2940 if (desired_row
->enabled_p
)
2941 assign_row (current_row
, desired_row
);
2943 swap_glyph_pointers (desired_row
, current_row
);
2944 current_row
->enabled_p
= 1;
2948 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2953 /* Perform row dance after scrolling. We are working on the range of
2954 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2955 including) in MATRIX. COPY_FROM is a vector containing, for each
2956 row I in the range 0 <= I < NLINES, the index of the original line
2957 to move to I. This index is relative to the row range, i.e. 0 <=
2958 index < NLINES. RETAINED_P is a vector containing zero for each
2959 row 0 <= I < NLINES which is empty.
2961 This function is called from do_scrolling and do_direct_scrolling. */
2964 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2966 struct glyph_matrix
*matrix
;
2967 int unchanged_at_top
, nlines
;
2971 /* A copy of original rows. */
2972 struct glyph_row
*old_rows
;
2974 /* Rows to assign to. */
2975 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2979 /* Make a copy of the original rows. */
2980 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2981 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2983 /* Assign new rows, maybe clear lines. */
2984 for (i
= 0; i
< nlines
; ++i
)
2986 int enabled_before_p
= new_rows
[i
].enabled_p
;
2988 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2989 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2990 new_rows
[i
] = old_rows
[copy_from
[i
]];
2991 new_rows
[i
].enabled_p
= enabled_before_p
;
2993 /* RETAINED_P is zero for empty lines. */
2994 if (!retained_p
[copy_from
[i
]])
2995 new_rows
[i
].enabled_p
= 0;
2998 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2999 if (frame_matrix_frame
)
3000 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3001 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3005 /* Synchronize glyph pointers in the current matrix of window W with
3006 the current frame matrix. */
3009 sync_window_with_frame_matrix_rows (w
)
3012 struct frame
*f
= XFRAME (w
->frame
);
3013 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3014 int left
, right
, x
, width
;
3016 /* Preconditions: W must be a leaf window on a tty frame. */
3017 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3018 xassert (!FRAME_WINDOW_P (f
));
3020 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3021 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3022 x
= w
->current_matrix
->matrix_x
;
3023 width
= w
->current_matrix
->matrix_w
;
3025 window_row
= w
->current_matrix
->rows
;
3026 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3027 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3029 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3031 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3032 = frame_row
->glyphs
[0] + x
;
3033 window_row
->glyphs
[TEXT_AREA
]
3034 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3035 window_row
->glyphs
[LAST_AREA
]
3036 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3037 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3038 = window_row
->glyphs
[LAST_AREA
] - right
;
3043 /* Return the window in the window tree rooted in W containing frame
3044 row ROW. Value is null if none is found. */
3047 frame_row_to_window (w
, row
)
3051 struct window
*found
= NULL
;
3055 if (!NILP (w
->hchild
))
3056 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3057 else if (!NILP (w
->vchild
))
3058 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3059 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3060 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3063 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3070 /* Perform a line dance in the window tree rooted at W, after
3071 scrolling a frame matrix in mirrored_line_dance.
3073 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3074 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3075 COPY_FROM is a vector containing, for each row I in the range 0 <=
3076 I < NLINES, the index of the original line to move to I. This
3077 index is relative to the row range, i.e. 0 <= index < NLINES.
3078 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3082 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3084 int unchanged_at_top
, nlines
;
3090 if (!NILP (w
->hchild
))
3091 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3092 nlines
, copy_from
, retained_p
);
3093 else if (!NILP (w
->vchild
))
3094 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3095 nlines
, copy_from
, retained_p
);
3098 /* W is a leaf window, and we are working on its current
3100 struct glyph_matrix
*m
= w
->current_matrix
;
3102 struct glyph_row
*old_rows
;
3104 /* Make a copy of the original rows of matrix m. */
3105 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3106 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3108 for (i
= 0; i
< nlines
; ++i
)
3110 /* Frame relative line assigned to. */
3111 int frame_to
= i
+ unchanged_at_top
;
3113 /* Frame relative line assigned. */
3114 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3116 /* Window relative line assigned to. */
3117 int window_to
= frame_to
- m
->matrix_y
;
3119 /* Window relative line assigned. */
3120 int window_from
= frame_from
- m
->matrix_y
;
3122 /* Is assigned line inside window? */
3123 int from_inside_window_p
3124 = window_from
>= 0 && window_from
< m
->matrix_h
;
3126 /* Is assigned to line inside window? */
3127 int to_inside_window_p
3128 = window_to
>= 0 && window_to
< m
->matrix_h
;
3130 if (from_inside_window_p
&& to_inside_window_p
)
3132 /* Enabled setting before assignment. */
3133 int enabled_before_p
;
3135 /* Do the assignment. The enabled_p flag is saved
3136 over the assignment because the old redisplay did
3138 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3139 m
->rows
[window_to
] = old_rows
[window_from
];
3140 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3142 /* If frame line is empty, window line is empty, too. */
3143 if (!retained_p
[copy_from
[i
]])
3144 m
->rows
[window_to
].enabled_p
= 0;
3146 else if (to_inside_window_p
)
3148 /* A copy between windows. This is an infrequent
3149 case not worth optimizing. */
3150 struct frame
*f
= XFRAME (w
->frame
);
3151 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3153 struct glyph_matrix
*m2
;
3156 w2
= frame_row_to_window (root
, frame_from
);
3157 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3158 -nw', FROM_FRAME sometimes has no associated window.
3159 This check avoids a segfault if W2 is null. */
3162 m2
= w2
->current_matrix
;
3163 m2_from
= frame_from
- m2
->matrix_y
;
3164 copy_row_except_pointers (m
->rows
+ window_to
,
3165 m2
->rows
+ m2_from
);
3167 /* If frame line is empty, window line is empty, too. */
3168 if (!retained_p
[copy_from
[i
]])
3169 m
->rows
[window_to
].enabled_p
= 0;
3173 else if (from_inside_window_p
)
3177 /* If there was a copy between windows, make sure glyph
3178 pointers are in sync with the frame matrix. */
3180 sync_window_with_frame_matrix_rows (w
);
3182 /* Check that no pointers are lost. */
3186 /* Next window on same level. */
3187 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3194 /* Check that window and frame matrices agree about their
3195 understanding where glyphs of the rows are to find. For each
3196 window in the window tree rooted at W, check that rows in the
3197 matrices of leaf window agree with their frame matrices about
3201 check_window_matrix_pointers (w
)
3206 if (!NILP (w
->hchild
))
3207 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3208 else if (!NILP (w
->vchild
))
3209 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3212 struct frame
*f
= XFRAME (w
->frame
);
3213 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3214 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3217 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3222 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3223 a window and FRAME_MATRIX is the corresponding frame matrix. For
3224 each row in WINDOW_MATRIX check that it's a slice of the
3225 corresponding frame row. If it isn't, abort. */
3228 check_matrix_pointers (window_matrix
, frame_matrix
)
3229 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3231 /* Row number in WINDOW_MATRIX. */
3234 /* Row number corresponding to I in FRAME_MATRIX. */
3235 int j
= window_matrix
->matrix_y
;
3237 /* For all rows check that the row in the window matrix is a
3238 slice of the row in the frame matrix. If it isn't we didn't
3239 mirror an operation on the frame matrix correctly. */
3240 while (i
< window_matrix
->nrows
)
3242 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3243 frame_matrix
->rows
+ j
))
3249 #endif /* GLYPH_DEBUG != 0 */
3253 /**********************************************************************
3254 VPOS and HPOS translations
3255 **********************************************************************/
3259 /* Translate vertical position VPOS which is relative to window W to a
3260 vertical position relative to W's frame. */
3263 window_to_frame_vpos (w
, vpos
)
3267 struct frame
*f
= XFRAME (w
->frame
);
3269 xassert (!FRAME_WINDOW_P (f
));
3270 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3271 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3272 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3277 /* Translate horizontal position HPOS which is relative to window W to
3278 a horizontal position relative to W's frame. */
3281 window_to_frame_hpos (w
, hpos
)
3285 struct frame
*f
= XFRAME (w
->frame
);
3287 xassert (!FRAME_WINDOW_P (f
));
3288 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3292 #endif /* GLYPH_DEBUG */
3296 /**********************************************************************
3298 **********************************************************************/
3300 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3301 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3307 CHECK_LIVE_FRAME (frame
);
3310 /* Ignore redraw requests, if frame has no glyphs yet.
3311 (Implementation note: It still has to be checked why we are
3312 called so early here). */
3313 if (!glyphs_initialized_initially_p
)
3318 if (FRAME_MSDOS_P (f
))
3319 set_terminal_modes (FRAME_DISPLAY (f
));
3322 clear_current_matrices (f
);
3324 if (FRAME_TERMCAP_P (f
))
3325 fflush (FRAME_TTY (f
)->output
);
3326 windows_or_buffers_changed
++;
3327 /* Mark all windows as inaccurate, so that every window will have
3328 its redisplay done. */
3329 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3330 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3336 /* Redraw frame F. This is nothing more than a call to the Lisp
3337 function redraw-frame. */
3344 XSETFRAME (frame
, f
);
3345 Fredraw_frame (frame
);
3349 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3350 doc
: /* Clear and redisplay all visible frames. */)
3353 Lisp_Object tail
, frame
;
3355 FOR_EACH_FRAME (tail
, frame
)
3356 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3357 Fredraw_frame (frame
);
3363 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3364 visible frames marked as garbaged. */
3367 redraw_garbaged_frames ()
3369 Lisp_Object tail
, frame
;
3371 FOR_EACH_FRAME (tail
, frame
)
3372 if (FRAME_VISIBLE_P (XFRAME (frame
))
3373 && FRAME_GARBAGED_P (XFRAME (frame
)))
3374 Fredraw_frame (frame
);
3379 /***********************************************************************
3381 ***********************************************************************/
3383 /* Try to update display and current glyph matrix directly.
3385 This function is called after a character G has been inserted into
3386 current_buffer. It tries to update the current glyph matrix and
3387 perform appropriate screen output to reflect the insertion. If it
3388 succeeds, the global flag redisplay_performed_directly_p will be
3389 set to 1, and thereby prevent the more costly general redisplay
3390 from running (see redisplay_internal).
3392 This function is not called for `hairy' character insertions.
3393 In particular, it is not called when after or before change
3394 functions exist, like they are used by font-lock. See keyboard.c
3395 for details where this function is called. */
3398 direct_output_for_insert (g
)
3401 register struct frame
*f
= SELECTED_FRAME ();
3402 struct window
*w
= XWINDOW (selected_window
);
3404 struct glyph_row
*glyph_row
;
3405 struct glyph
*glyphs
, *glyph
, *end
;
3407 /* Non-null means that redisplay of W is based on window matrices. */
3408 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3409 /* Non-null means we are in overwrite mode. */
3410 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3412 struct text_pos pos
;
3413 int delta
, delta_bytes
;
3415 /* Not done directly. */
3416 redisplay_performed_directly_p
= 0;
3418 /* Quickly give up for some common cases. */
3419 if (cursor_in_echo_area
3420 /* Give up if fonts have changed. */
3422 /* Give up if face attributes have been changed. */
3423 || face_change_count
3424 /* Give up if cursor position not really known. */
3425 || !display_completed
3426 /* Give up if buffer appears in two places. */
3427 || buffer_shared
> 1
3428 /* Give up if currently displaying a message instead of the
3429 minibuffer contents. */
3430 || (EQ (selected_window
, minibuf_window
)
3431 && EQ (minibuf_window
, echo_area_window
))
3432 /* Give up for hscrolled mini-buffer because display of the prompt
3433 is handled specially there (see display_line). */
3434 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3435 /* Give up if overwriting in the middle of a line. */
3438 && FETCH_BYTE (PT
) != '\n')
3439 /* Give up for tabs and line ends. */
3443 /* Give up if unable to display the cursor in the window. */
3444 || w
->cursor
.vpos
< 0
3445 /* Give up if we are showing a message or just cleared the message
3446 because we might need to resize the echo area window. */
3447 || !NILP (echo_area_buffer
[0])
3448 || !NILP (echo_area_buffer
[1])
3449 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3450 /* Can't do it in a continued line because continuation
3451 lines would change. */
3452 (glyph_row
->continued_p
3453 || glyph_row
->exact_window_width_line_p
3454 /* Can't use this method if the line overlaps others or is
3455 overlapped by others because these other lines would
3456 have to be redisplayed. */
3457 || glyph_row
->overlapping_p
3458 || glyph_row
->overlapped_p
))
3459 /* Can't do it for partial width windows on terminal frames
3460 because we can't clear to eol in such a window. */
3461 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3464 /* If we can't insert glyphs, we can use this method only
3465 at the end of a line. */
3466 if (!FRAME_CHAR_INS_DEL_OK (f
))
3467 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3470 /* Set up a display iterator structure for W. Glyphs will be
3471 produced in scratch_glyph_row. Current position is W's cursor
3473 clear_glyph_row (&scratch_glyph_row
);
3474 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3475 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3476 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3479 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3480 if (glyph_row
->mouse_face_p
)
3483 /* Give up if highlighting trailing whitespace and we have trailing
3484 whitespace in glyph_row. We would have to remove the trailing
3485 whitespace face in that case. */
3486 if (!NILP (Vshow_trailing_whitespace
)
3487 && glyph_row
->used
[TEXT_AREA
])
3491 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3492 if (last
->type
== STRETCH_GLYPH
3493 || (last
->type
== CHAR_GLYPH
3494 && last
->u
.ch
== ' '))
3498 /* Give up if there are overlay strings at pos. This would fail
3499 if the overlay string has newlines in it. */
3500 if (STRINGP (it
.string
))
3503 it
.hpos
= w
->cursor
.hpos
;
3504 it
.vpos
= w
->cursor
.vpos
;
3505 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3506 it
.current_y
= w
->cursor
.y
;
3507 it
.end_charpos
= PT
;
3508 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3509 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3511 /* More than one display element may be returned for PT - 1 if
3512 (i) it's a control character which is translated into `\003' or
3513 `^C', or (ii) it has a display table entry, or (iii) it's a
3514 combination of both. */
3515 delta
= delta_bytes
= 0;
3516 while (get_next_display_element (&it
))
3518 PRODUCE_GLYPHS (&it
);
3520 /* Give up if glyph doesn't fit completely on the line. */
3521 if (it
.current_x
>= it
.last_visible_x
)
3524 /* Give up if new glyph has different ascent or descent than
3525 the original row, or if it is not a character glyph. */
3526 if (glyph_row
->ascent
!= it
.ascent
3527 || glyph_row
->height
!= it
.ascent
+ it
.descent
3528 || glyph_row
->phys_ascent
!= it
.phys_ascent
3529 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3530 || it
.what
!= IT_CHARACTER
)
3534 delta_bytes
+= it
.len
;
3535 set_iterator_to_next (&it
, 1);
3538 /* Give up if we hit the right edge of the window. We would have
3539 to insert truncation or continuation glyphs. */
3540 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3541 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3544 /* Give up if there is a \t following in the line. */
3546 it2
.end_charpos
= ZV
;
3547 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3548 while (get_next_display_element (&it2
)
3549 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3553 set_iterator_to_next (&it2
, 1);
3556 /* Number of new glyphs produced. */
3557 n
= it
.glyph_row
->used
[TEXT_AREA
];
3559 /* Start and end of glyphs in original row. */
3560 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3561 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3563 /* Make room for new glyphs, then insert them. */
3564 xassert (end
- glyphs
- n
>= 0);
3565 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3566 (end
- glyphs
- n
) * sizeof (*end
));
3567 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3568 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3569 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3571 /* Compute new line width. */
3572 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3573 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3574 glyph_row
->pixel_width
= glyph_row
->x
;
3577 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3581 /* Increment buffer positions for glyphs following the newly
3583 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3584 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3585 glyph
->charpos
+= delta
;
3587 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3589 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3590 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3593 /* Adjust positions in lines following the one we are in. */
3594 increment_matrix_positions (w
->current_matrix
,
3596 w
->current_matrix
->nrows
,
3597 delta
, delta_bytes
);
3599 glyph_row
->contains_overlapping_glyphs_p
3600 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3602 glyph_row
->displays_text_p
= 1;
3603 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3604 XFASTINT (w
->window_end_vpos
)));
3606 if (!NILP (Vshow_trailing_whitespace
))
3607 highlight_trailing_whitespace (it
.f
, glyph_row
);
3609 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3610 In the middle, we have to insert glyphs. Note that this is now
3611 implemented for X frames. The implementation uses updated_window
3613 updated_row
= glyph_row
;
3614 updated_area
= TEXT_AREA
;
3618 FRAME_RIF (f
)->update_window_begin_hook (w
);
3620 if (glyphs
== end
- n
3621 /* In front of a space added by append_space. */
3622 || (glyphs
== end
- n
- 1
3623 && (end
- n
)->charpos
<= 0))
3624 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3626 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3630 if (glyphs
== end
- n
)
3631 write_glyphs (f
, glyphs
, n
);
3633 insert_glyphs (f
, glyphs
, n
);
3636 w
->cursor
.hpos
+= n
;
3637 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3638 xassert (w
->cursor
.hpos
>= 0
3639 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3641 /* How to set the cursor differs depending on whether we are
3642 using a frame matrix or a window matrix. Note that when
3643 a frame matrix is used, cursor_to expects frame coordinates,
3644 and the X and Y parameters are not used. */
3645 if (window_redisplay_p
)
3646 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3647 w
->cursor
.y
, w
->cursor
.x
);
3651 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3652 + (INTEGERP (w
->left_margin_cols
)
3653 ? XFASTINT (w
->left_margin_cols
)
3655 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3656 cursor_to (f
, y
, x
);
3659 #ifdef HAVE_WINDOW_SYSTEM
3660 update_window_fringes (w
, 0);
3664 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3667 if (FRAME_TERMCAP_P (f
))
3668 fflush (FRAME_TTY (f
)->output
);
3670 TRACE ((stderr
, "direct output for insert\n"));
3671 mark_window_display_accurate (it
.window
, 1);
3672 redisplay_performed_directly_p
= 1;
3677 /* Perform a direct display update for moving PT by N positions
3678 left or right. N < 0 means a movement backwards. This function
3679 is currently only called for N == 1 or N == -1. */
3682 direct_output_forward_char (n
)
3685 struct frame
*f
= SELECTED_FRAME ();
3686 struct window
*w
= XWINDOW (selected_window
);
3687 struct glyph_row
*row
;
3689 /* Give up if point moved out of or into a composition. */
3690 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3691 current_buffer
, PT
))
3694 /* Give up if face attributes have been changed. */
3695 if (face_change_count
)
3698 /* Give up if current matrix is not up to date or we are
3699 displaying a message. */
3700 if (!display_completed
|| cursor_in_echo_area
)
3703 /* Give up if the buffer's direction is reversed. */
3704 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3707 /* Can't use direct output if highlighting a region. */
3708 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3711 /* Can't use direct output if highlighting trailing whitespace. */
3712 if (!NILP (Vshow_trailing_whitespace
))
3715 /* Give up if we are showing a message or just cleared the message
3716 because we might need to resize the echo area window. */
3717 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3720 /* Give up if currently displaying a message instead of the
3721 minibuffer contents. */
3722 if (XWINDOW (minibuf_window
) == w
3723 && EQ (minibuf_window
, echo_area_window
))
3726 /* Give up if we don't know where the cursor is. */
3727 if (w
->cursor
.vpos
< 0)
3730 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3732 /* Give up if PT is outside of the last known cursor row. */
3733 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3734 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3737 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3739 w
->last_cursor
= w
->cursor
;
3740 XSETFASTINT (w
->last_point
, PT
);
3742 xassert (w
->cursor
.hpos
>= 0
3743 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3745 if (FRAME_WINDOW_P (f
))
3746 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3747 w
->cursor
.y
, w
->cursor
.x
);
3751 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3752 + (INTEGERP (w
->left_margin_cols
)
3753 ? XFASTINT (w
->left_margin_cols
)
3755 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3756 cursor_to (f
, y
, x
);
3759 if (FRAME_TERMCAP_P (f
))
3760 fflush (FRAME_TTY (f
)->output
);
3761 redisplay_performed_directly_p
= 1;
3767 /***********************************************************************
3769 ***********************************************************************/
3771 /* Update frame F based on the data in desired matrices.
3773 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3774 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3777 Value is non-zero if redisplay was stopped due to pending input. */
3780 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3783 int inhibit_hairy_id_p
;
3785 /* 1 means display has been paused because of pending input. */
3787 struct window
*root_window
= XWINDOW (f
->root_window
);
3789 if (FRAME_WINDOW_P (f
))
3791 /* We are working on window matrix basis. All windows whose
3792 flag must_be_updated_p is set have to be updated. */
3794 /* Record that we are not working on frame matrices. */
3795 set_frame_matrix_frame (NULL
);
3797 /* Update all windows in the window tree of F, maybe stopping
3798 when pending input is detected. */
3801 /* Update the menu bar on X frames that don't have toolkit
3803 if (WINDOWP (f
->menu_bar_window
))
3804 update_window (XWINDOW (f
->menu_bar_window
), 1);
3806 /* Update the tool-bar window, if present. */
3807 if (WINDOWP (f
->tool_bar_window
))
3809 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3811 /* Update tool-bar window. */
3812 if (w
->must_be_updated_p
)
3816 update_window (w
, 1);
3817 w
->must_be_updated_p
= 0;
3819 /* Swap tool-bar strings. We swap because we want to
3821 tem
= f
->current_tool_bar_string
;
3822 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3823 f
->desired_tool_bar_string
= tem
;
3828 /* Update windows. */
3829 paused_p
= update_window_tree (root_window
, force_p
);
3832 /* This flush is a performance bottleneck under X,
3833 and it doesn't seem to be necessary anyway (in general).
3834 It is necessary when resizing the window with the mouse, or
3835 at least the fringes are not redrawn in a timely manner. ++kfs */
3836 if (f
->force_flush_display_p
)
3838 FRAME_RIF (f
)->flush_display (f
);
3839 f
->force_flush_display_p
= 0;
3844 /* We are working on frame matrix basis. Set the frame on whose
3845 frame matrix we operate. */
3846 set_frame_matrix_frame (f
);
3848 /* Build F's desired matrix from window matrices. */
3849 build_frame_matrix (f
);
3851 /* Update the display */
3853 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3856 if (FRAME_TERMCAP_P (f
))
3858 if (FRAME_TTY (f
)->termscript
)
3859 fflush (FRAME_TTY (f
)->termscript
);
3860 fflush (FRAME_TTY (f
)->output
);
3863 /* Check window matrices for lost pointers. */
3865 check_window_matrix_pointers (root_window
);
3866 add_frame_display_history (f
, paused_p
);
3870 /* Reset flags indicating that a window should be updated. */
3871 set_window_update_flags (root_window
, 0);
3873 display_completed
= !paused_p
;
3879 /************************************************************************
3880 Window-based updates
3881 ************************************************************************/
3883 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3884 don't stop updating when input is pending. */
3887 update_window_tree (w
, force_p
)
3893 while (w
&& !paused_p
)
3895 if (!NILP (w
->hchild
))
3896 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3897 else if (!NILP (w
->vchild
))
3898 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3899 else if (w
->must_be_updated_p
)
3900 paused_p
|= update_window (w
, force_p
);
3902 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3909 /* Update window W if its flag must_be_updated_p is non-zero. If
3910 FORCE_P is non-zero, don't stop updating if input is pending. */
3913 update_single_window (w
, force_p
)
3917 if (w
->must_be_updated_p
)
3919 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3921 /* Record that this is not a frame-based redisplay. */
3922 set_frame_matrix_frame (NULL
);
3926 update_window (w
, force_p
);
3929 /* Reset flag in W. */
3930 w
->must_be_updated_p
= 0;
3935 /* Redraw lines from the current matrix of window W that are
3936 overlapped by other rows. YB is bottom-most y-position in W. */
3939 redraw_overlapped_rows (w
, yb
)
3944 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3946 /* If rows overlapping others have been changed, the rows being
3947 overlapped have to be redrawn. This won't draw lines that have
3948 already been drawn in update_window_line because overlapped_p in
3949 desired rows is 0, so after row assignment overlapped_p in
3950 current rows is 0. */
3951 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3953 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3955 if (!row
->enabled_p
)
3957 else if (row
->mode_line_p
)
3960 if (row
->overlapped_p
)
3962 enum glyph_row_area area
;
3964 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3967 updated_area
= area
;
3968 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3969 area
== TEXT_AREA
? row
->x
: 0);
3970 if (row
->used
[area
])
3971 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3973 FRAME_RIF (f
)->clear_end_of_line (-1);
3976 row
->overlapped_p
= 0;
3979 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3985 /* Redraw lines from the current matrix of window W that overlap
3986 others. YB is bottom-most y-position in W. */
3989 redraw_overlapping_rows (w
, yb
)
3994 struct glyph_row
*row
;
3995 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3997 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3999 row
= w
->current_matrix
->rows
+ i
;
4001 if (!row
->enabled_p
)
4003 else if (row
->mode_line_p
)
4006 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4008 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4010 if (row
->used
[LEFT_MARGIN_AREA
])
4011 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
4013 if (row
->used
[TEXT_AREA
])
4014 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
4016 if (row
->used
[RIGHT_MARGIN_AREA
])
4017 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4019 /* Record in neighbour rows that ROW overwrites part of their
4021 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4022 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4023 if ((row
->phys_height
- row
->phys_ascent
4024 > row
->height
- row
->ascent
)
4026 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4037 /* Check that no row in the current matrix of window W is enabled
4038 which is below what's displayed in the window. */
4041 check_current_matrix_flags (w
)
4044 int last_seen_p
= 0;
4045 int i
, yb
= window_text_bottom_y (w
);
4047 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4049 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4050 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4052 else if (last_seen_p
&& row
->enabled_p
)
4057 #endif /* GLYPH_DEBUG */
4060 /* Update display of window W. FORCE_P non-zero means that we should
4061 not stop when detecting pending input. */
4064 update_window (w
, force_p
)
4068 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4070 int preempt_count
= baud_rate
/ 2400 + 1;
4071 extern int input_pending
;
4072 extern Lisp_Object do_mouse_tracking
;
4073 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4075 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4077 /* Check that W's frame doesn't have glyph matrices. */
4078 xassert (FRAME_WINDOW_P (f
));
4081 /* Check pending input the first time so that we can quickly return. */
4082 if (redisplay_dont_pause
)
4085 detect_input_pending_ignore_squeezables ();
4087 /* If forced to complete the update, or if no input is pending, do
4089 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4091 struct glyph_row
*row
, *end
;
4092 struct glyph_row
*mode_line_row
;
4093 struct glyph_row
*header_line_row
;
4094 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4096 rif
->update_window_begin_hook (w
);
4097 yb
= window_text_bottom_y (w
);
4099 /* If window has a header line, update it before everything else.
4100 Adjust y-positions of other rows by the header line height. */
4101 row
= desired_matrix
->rows
;
4102 end
= row
+ desired_matrix
->nrows
- 1;
4104 if (row
->mode_line_p
)
4106 header_line_row
= row
;
4110 header_line_row
= NULL
;
4112 /* Update the mode line, if necessary. */
4113 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4114 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4116 mode_line_row
->y
= yb
;
4117 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4119 &mouse_face_overwritten_p
);
4123 /* Find first enabled row. Optimizations in redisplay_internal
4124 may lead to an update with only one row enabled. There may
4125 be also completely empty matrices. */
4126 while (row
< end
&& !row
->enabled_p
)
4129 /* Try reusing part of the display by copying. */
4130 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4132 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4135 /* All rows were found to be equal. */
4141 /* We've scrolled the display. */
4147 /* Update the rest of the lines. */
4148 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4151 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4154 /* We'll have to play a little bit with when to
4155 detect_input_pending. If it's done too often,
4156 scrolling large windows with repeated scroll-up
4157 commands will too quickly pause redisplay. */
4158 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4159 detect_input_pending_ignore_squeezables ();
4161 changed_p
|= update_window_line (w
, vpos
,
4162 &mouse_face_overwritten_p
);
4164 /* Mark all rows below the last visible one in the current
4165 matrix as invalid. This is necessary because of
4166 variable line heights. Consider the case of three
4167 successive redisplays, where the first displays 5
4168 lines, the second 3 lines, and the third 5 lines again.
4169 If the second redisplay wouldn't mark rows in the
4170 current matrix invalid, the third redisplay might be
4171 tempted to optimize redisplay based on lines displayed
4172 in the first redisplay. */
4173 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4174 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4175 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4178 /* Was display preempted? */
4179 paused_p
= row
< end
;
4183 /* Update the header line after scrolling because a new header
4184 line would otherwise overwrite lines at the top of the window
4185 that can be scrolled. */
4186 if (header_line_row
&& header_line_row
->enabled_p
)
4188 header_line_row
->y
= 0;
4189 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4193 /* Fix the appearance of overlapping/overlapped rows. */
4194 if (!paused_p
&& !w
->pseudo_window_p
)
4196 if (changed_p
&& rif
->fix_overlapping_area
)
4198 redraw_overlapped_rows (w
, yb
);
4199 redraw_overlapping_rows (w
, yb
);
4202 /* Make cursor visible at cursor position of W. */
4203 set_window_cursor_after_update (w
);
4205 #if 0 /* Check that current matrix invariants are satisfied. This is
4206 for debugging only. See the comment of check_matrix_invariants. */
4207 IF_DEBUG (check_matrix_invariants (w
));
4212 /* Remember the redisplay method used to display the matrix. */
4213 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4216 #ifdef HAVE_WINDOW_SYSTEM
4217 update_window_fringes (w
, 0);
4220 /* End the update of window W. Don't set the cursor if we
4221 paused updating the display because in this case,
4222 set_window_cursor_after_update hasn't been called, and
4223 output_cursor doesn't contain the cursor location. */
4224 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4230 /* check_current_matrix_flags (w); */
4231 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4234 clear_glyph_matrix (desired_matrix
);
4240 /* Update the display of area AREA in window W, row number VPOS.
4241 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4244 update_marginal_area (w
, area
, vpos
)
4248 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4249 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4251 /* Let functions in xterm.c know what area subsequent X positions
4252 will be relative to. */
4253 updated_area
= area
;
4255 /* Set cursor to start of glyphs, write them, and clear to the end
4256 of the area. I don't think that something more sophisticated is
4257 necessary here, since marginal areas will not be the default. */
4258 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4259 if (desired_row
->used
[area
])
4260 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4261 rif
->clear_end_of_line (-1);
4265 /* Update the display of the text area of row VPOS in window W.
4266 Value is non-zero if display has changed. */
4269 update_text_area (w
, vpos
)
4273 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4274 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4275 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4278 /* Let functions in xterm.c know what area subsequent X positions
4279 will be relative to. */
4280 updated_area
= TEXT_AREA
;
4282 /* If rows are at different X or Y, or rows have different height,
4283 or the current row is marked invalid, write the entire line. */
4284 if (!current_row
->enabled_p
4285 || desired_row
->y
!= current_row
->y
4286 || desired_row
->ascent
!= current_row
->ascent
4287 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4288 || desired_row
->phys_height
!= current_row
->phys_height
4289 || desired_row
->visible_height
!= current_row
->visible_height
4290 || current_row
->overlapped_p
4291 || current_row
->mouse_face_p
4292 || current_row
->x
!= desired_row
->x
)
4294 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4296 if (desired_row
->used
[TEXT_AREA
])
4297 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4298 desired_row
->used
[TEXT_AREA
]);
4300 /* Clear to end of window. */
4301 rif
->clear_end_of_line (-1);
4304 /* This erases the cursor. We do this here because
4305 notice_overwritten_cursor cannot easily check this, which
4306 might indicate that the whole functionality of
4307 notice_overwritten_cursor would better be implemented here.
4308 On the other hand, we need notice_overwritten_cursor as long
4309 as mouse highlighting is done asynchronously outside of
4311 if (vpos
== w
->phys_cursor
.vpos
)
4312 w
->phys_cursor_on_p
= 0;
4317 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4318 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4319 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4320 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4322 /* If the desired row extends its face to the text area end,
4323 make sure we write at least one glyph, so that the face
4324 extension actually takes place. */
4325 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4328 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4332 /* Loop over glyphs that current and desired row may have
4338 /* Skip over glyphs that both rows have in common. These
4339 don't have to be written. We can't skip if the last
4340 current glyph overlaps the glyph to its right. For
4341 example, consider a current row of `if ' with the `f' in
4342 Courier bold so that it overlaps the ` ' to its right.
4343 If the desired row is ` ', we would skip over the space
4344 after the `if' and there would remain a pixel from the
4345 `f' on the screen. */
4346 if (overlapping_glyphs_p
&& i
> 0)
4348 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4351 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4353 can_skip_p
= right
== 0;
4359 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4361 x
+= desired_glyph
->pixel_width
;
4362 ++desired_glyph
, ++current_glyph
, ++i
;
4365 /* Consider the case that the current row contains "xxx
4366 ppp ggg" in italic Courier font, and the desired row
4367 is "xxx ggg". The character `p' has lbearing, `g'
4368 has not. The loop above will stop in front of the
4369 first `p' in the current row. If we would start
4370 writing glyphs there, we wouldn't erase the lbearing
4371 of the `p'. The rest of the lbearing problem is then
4372 taken care of by draw_glyphs. */
4373 if (overlapping_glyphs_p
4375 && i
< current_row
->used
[TEXT_AREA
]
4376 && (current_row
->used
[TEXT_AREA
]
4377 != desired_row
->used
[TEXT_AREA
]))
4381 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4383 while (left
> 0 && i
> 0)
4385 --i
, --desired_glyph
, --current_glyph
;
4386 x
-= desired_glyph
->pixel_width
;
4387 left
-= desired_glyph
->pixel_width
;
4392 /* Try to avoid writing the entire rest of the desired row
4393 by looking for a resync point. This mainly prevents
4394 mode line flickering in the case the mode line is in
4395 fixed-pitch font, which it usually will be. */
4396 if (i
< desired_row
->used
[TEXT_AREA
])
4398 int start_x
= x
, start_hpos
= i
;
4399 struct glyph
*start
= desired_glyph
;
4401 int skip_first_p
= !can_skip_p
;
4403 /* Find the next glyph that's equal again. */
4406 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4409 x
+= desired_glyph
->pixel_width
;
4410 current_x
+= current_glyph
->pixel_width
;
4411 ++desired_glyph
, ++current_glyph
, ++i
;
4415 if (i
== start_hpos
|| x
!= current_x
)
4419 desired_glyph
= start
;
4423 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4424 rif
->write_glyphs (start
, i
- start_hpos
);
4429 /* Write the rest. */
4430 if (i
< desired_row
->used
[TEXT_AREA
])
4432 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4433 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4437 /* Maybe clear to end of line. */
4438 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4440 /* If new row extends to the end of the text area, nothing
4441 has to be cleared, if and only if we did a write_glyphs
4442 above. This is made sure by setting desired_stop_pos
4443 appropriately above. */
4444 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4446 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4448 /* If old row extends to the end of the text area, clear. */
4449 if (i
>= desired_row
->used
[TEXT_AREA
])
4450 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4451 desired_row
->pixel_width
);
4452 rif
->clear_end_of_line (-1);
4455 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4457 /* Otherwise clear to the end of the old row. Everything
4458 after that position should be clear already. */
4461 if (i
>= desired_row
->used
[TEXT_AREA
])
4462 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4463 desired_row
->pixel_width
);
4465 /* If cursor is displayed at the end of the line, make sure
4466 it's cleared. Nowadays we don't have a phys_cursor_glyph
4467 with which to erase the cursor (because this method
4468 doesn't work with lbearing/rbearing), so we must do it
4470 if (vpos
== w
->phys_cursor
.vpos
4471 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4473 w
->phys_cursor_on_p
= 0;
4477 x
= current_row
->pixel_width
;
4478 rif
->clear_end_of_line (x
);
4487 /* Update row VPOS in window W. Value is non-zero if display has been
4491 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4493 int vpos
, *mouse_face_overwritten_p
;
4495 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4496 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4497 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4500 /* Set the row being updated. This is important to let xterm.c
4501 know what line height values are in effect. */
4502 updated_row
= desired_row
;
4504 /* A row can be completely invisible in case a desired matrix was
4505 built with a vscroll and then make_cursor_line_fully_visible shifts
4506 the matrix. Make sure to make such rows current anyway, since
4507 we need the correct y-position, for example, in the current matrix. */
4508 if (desired_row
->mode_line_p
4509 || desired_row
->visible_height
> 0)
4511 xassert (desired_row
->enabled_p
);
4513 /* Update display of the left margin area, if there is one. */
4514 if (!desired_row
->full_width_p
4515 && !NILP (w
->left_margin_cols
))
4518 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4521 /* Update the display of the text area. */
4522 if (update_text_area (w
, vpos
))
4525 if (current_row
->mouse_face_p
)
4526 *mouse_face_overwritten_p
= 1;
4529 /* Update display of the right margin area, if there is one. */
4530 if (!desired_row
->full_width_p
4531 && !NILP (w
->right_margin_cols
))
4534 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4537 /* Draw truncation marks etc. */
4538 if (!current_row
->enabled_p
4539 || desired_row
->y
!= current_row
->y
4540 || desired_row
->visible_height
!= current_row
->visible_height
4541 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4542 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4543 || current_row
->redraw_fringe_bitmaps_p
4544 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4545 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4546 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4547 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4548 rif
->after_update_window_line_hook (desired_row
);
4551 /* Update current_row from desired_row. */
4552 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4558 /* Set the cursor after an update of window W. This function may only
4559 be called from update_window. */
4562 set_window_cursor_after_update (w
)
4565 struct frame
*f
= XFRAME (w
->frame
);
4566 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4567 int cx
, cy
, vpos
, hpos
;
4569 /* Not intended for frame matrix updates. */
4570 xassert (FRAME_WINDOW_P (f
));
4572 if (cursor_in_echo_area
4573 && !NILP (echo_area_buffer
[0])
4574 /* If we are showing a message instead of the mini-buffer,
4575 show the cursor for the message instead. */
4576 && XWINDOW (minibuf_window
) == w
4577 && EQ (minibuf_window
, echo_area_window
)
4578 /* These cases apply only to the frame that contains
4579 the active mini-buffer window. */
4580 && FRAME_HAS_MINIBUF_P (f
)
4581 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4583 cx
= cy
= vpos
= hpos
= 0;
4585 if (cursor_in_echo_area
>= 0)
4587 /* If the mini-buffer is several lines high, find the last
4588 line that has any text on it. Note: either all lines
4589 are enabled or none. Otherwise we wouldn't be able to
4591 struct glyph_row
*row
, *last_row
;
4592 struct glyph
*glyph
;
4593 int yb
= window_text_bottom_y (w
);
4596 row
= w
->current_matrix
->rows
;
4597 while (row
->enabled_p
4598 && (last_row
== NULL
4599 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4601 if (row
->used
[TEXT_AREA
]
4602 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4609 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4610 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4612 while (last
> start
&& last
->charpos
< 0)
4615 for (glyph
= start
; glyph
< last
; ++glyph
)
4617 cx
+= glyph
->pixel_width
;
4622 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4630 hpos
= w
->cursor
.hpos
;
4631 vpos
= w
->cursor
.vpos
;
4634 /* Window cursor can be out of sync for horizontally split windows. */
4635 hpos
= max (0, hpos
);
4636 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4637 vpos
= max (0, vpos
);
4638 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4639 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4643 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4644 tree rooted at W. */
4647 set_window_update_flags (w
, on_p
)
4653 if (!NILP (w
->hchild
))
4654 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4655 else if (!NILP (w
->vchild
))
4656 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4658 w
->must_be_updated_p
= on_p
;
4660 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4666 /***********************************************************************
4667 Window-Based Scrolling
4668 ***********************************************************************/
4670 /* Structure describing rows in scrolling_window. */
4674 /* Number of occurrences of this row in desired and current matrix. */
4675 int old_uses
, new_uses
;
4677 /* Vpos of row in new matrix. */
4678 int new_line_number
;
4680 /* Bucket index of this row_entry in the hash table row_table. */
4683 /* The row described by this entry. */
4684 struct glyph_row
*row
;
4686 /* Hash collision chain. */
4687 struct row_entry
*next
;
4690 /* A pool to allocate row_entry structures from, and the size of the
4691 pool. The pool is reallocated in scrolling_window when we find
4692 that we need a larger one. */
4694 static struct row_entry
*row_entry_pool
;
4695 static int row_entry_pool_size
;
4697 /* Index of next free entry in row_entry_pool. */
4699 static int row_entry_idx
;
4701 /* The hash table used during scrolling, and the table's size. This
4702 table is used to quickly identify equal rows in the desired and
4705 static struct row_entry
**row_table
;
4706 static int row_table_size
;
4708 /* Vectors of pointers to row_entry structures belonging to the
4709 current and desired matrix, and the size of the vectors. */
4711 static struct row_entry
**old_lines
, **new_lines
;
4712 static int old_lines_size
, new_lines_size
;
4714 /* A pool to allocate run structures from, and its size. */
4716 static struct run
*run_pool
;
4717 static int runs_size
;
4719 /* A vector of runs of lines found during scrolling. */
4721 static struct run
**runs
;
4723 /* Add glyph row ROW to the scrolling hash table during the scrolling
4726 static INLINE
struct row_entry
*
4727 add_row_entry (w
, row
)
4729 struct glyph_row
*row
;
4731 struct row_entry
*entry
;
4732 int i
= row
->hash
% row_table_size
;
4734 entry
= row_table
[i
];
4735 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4736 entry
= entry
->next
;
4740 entry
= row_entry_pool
+ row_entry_idx
++;
4742 entry
->old_uses
= entry
->new_uses
= 0;
4743 entry
->new_line_number
= 0;
4745 entry
->next
= row_table
[i
];
4746 row_table
[i
] = entry
;
4753 /* Try to reuse part of the current display of W by scrolling lines.
4754 HEADER_LINE_P non-zero means W has a header line.
4756 The algorithm is taken from Communications of the ACM, Apr78 "A
4757 Technique for Isolating Differences Between Files." It should take
4760 A short outline of the steps of the algorithm
4762 1. Skip lines equal at the start and end of both matrices.
4764 2. Enter rows in the current and desired matrix into a symbol
4765 table, counting how often they appear in both matrices.
4767 3. Rows that appear exactly once in both matrices serve as anchors,
4768 i.e. we assume that such lines are likely to have been moved.
4770 4. Starting from anchor lines, extend regions to be scrolled both
4771 forward and backward.
4775 -1 if all rows were found to be equal.
4776 0 to indicate that we did not scroll the display, or
4777 1 if we did scroll. */
4780 scrolling_window (w
, header_line_p
)
4784 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4785 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4786 int yb
= window_text_bottom_y (w
);
4787 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4788 int nruns
, nbytes
, n
, run_idx
;
4789 struct row_entry
*entry
;
4790 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4792 /* Skip over rows equal at the start. */
4793 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4795 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4796 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4800 && !d
->redraw_fringe_bitmaps_p
4802 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4803 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4804 && row_equal_p (w
, c
, d
, 1))
4813 /* Give up if some rows in the desired matrix are not enabled. */
4814 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4817 first_old
= first_new
= i
;
4819 /* Set last_new to the index + 1 of the last enabled row in the
4822 while (i
< desired_matrix
->nrows
- 1
4823 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4824 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4827 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4832 /* Set last_old to the index + 1 of the last enabled row in the
4833 current matrix. We don't look at the enabled flag here because
4834 we plan to reuse part of the display even if other parts are
4837 while (i
< current_matrix
->nrows
- 1)
4839 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4848 /* Skip over rows equal at the bottom. */
4851 while (i
- 1 > first_new
4852 && j
- 1 > first_old
4853 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4854 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4855 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4856 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4858 MATRIX_ROW (desired_matrix
, i
- 1),
4859 MATRIX_ROW (current_matrix
, j
- 1), 1))
4864 /* Nothing to do if all rows are equal. */
4865 if (last_new
== first_new
)
4868 /* Reallocate vectors, tables etc. if necessary. */
4870 if (current_matrix
->nrows
> old_lines_size
)
4872 old_lines_size
= current_matrix
->nrows
;
4873 nbytes
= old_lines_size
* sizeof *old_lines
;
4874 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4877 if (desired_matrix
->nrows
> new_lines_size
)
4879 new_lines_size
= desired_matrix
->nrows
;
4880 nbytes
= new_lines_size
* sizeof *new_lines
;
4881 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4884 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4885 if (3 * n
> row_table_size
)
4887 row_table_size
= next_almost_prime (3 * n
);
4888 nbytes
= row_table_size
* sizeof *row_table
;
4889 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4890 bzero (row_table
, nbytes
);
4893 if (n
> row_entry_pool_size
)
4895 row_entry_pool_size
= n
;
4896 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4897 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4900 if (desired_matrix
->nrows
> runs_size
)
4902 runs_size
= desired_matrix
->nrows
;
4903 nbytes
= runs_size
* sizeof *runs
;
4904 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4905 nbytes
= runs_size
* sizeof *run_pool
;
4906 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4909 nruns
= run_idx
= 0;
4912 /* Add rows from the current and desired matrix to the hash table
4913 row_hash_table to be able to find equal ones quickly. */
4915 for (i
= first_old
; i
< last_old
; ++i
)
4917 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4919 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4920 old_lines
[i
] = entry
;
4924 old_lines
[i
] = NULL
;
4927 for (i
= first_new
; i
< last_new
; ++i
)
4929 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4930 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4932 entry
->new_line_number
= i
;
4933 new_lines
[i
] = entry
;
4936 /* Identify moves based on lines that are unique and equal
4937 in both matrices. */
4938 for (i
= first_old
; i
< last_old
;)
4940 && old_lines
[i
]->old_uses
== 1
4941 && old_lines
[i
]->new_uses
== 1)
4944 int new_line
= old_lines
[i
]->new_line_number
;
4945 struct run
*run
= run_pool
+ run_idx
++;
4948 run
->current_vpos
= i
;
4949 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4950 run
->desired_vpos
= new_line
;
4951 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4953 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4955 /* Extend backward. */
4958 while (j
> first_old
4960 && old_lines
[j
] == new_lines
[k
])
4962 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4963 --run
->current_vpos
;
4964 --run
->desired_vpos
;
4967 run
->desired_y
-= h
;
4968 run
->current_y
-= h
;
4972 /* Extend forward. */
4977 && old_lines
[j
] == new_lines
[k
])
4979 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4985 /* Insert run into list of all runs. Order runs by copied
4986 pixel lines. Note that we record runs that don't have to
4987 be copied because they are already in place. This is done
4988 because we can avoid calling update_window_line in this
4990 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4992 for (k
= nruns
; k
> j
; --k
)
4993 runs
[k
] = runs
[k
- 1];
5002 /* Do the moves. Do it in a way that we don't overwrite something
5003 we want to copy later on. This is not solvable in general
5004 because there is only one display and we don't have a way to
5005 exchange areas on this display. Example:
5007 +-----------+ +-----------+
5009 +-----------+ --> +-----------+
5011 +-----------+ +-----------+
5013 Instead, prefer bigger moves, and invalidate moves that would
5014 copy from where we copied to. */
5016 for (i
= 0; i
< nruns
; ++i
)
5017 if (runs
[i
]->nrows
> 0)
5019 struct run
*r
= runs
[i
];
5021 /* Copy on the display. */
5022 if (r
->current_y
!= r
->desired_y
)
5024 rif
->scroll_run_hook (w
, r
);
5026 /* Invalidate runs that copy from where we copied to. */
5027 for (j
= i
+ 1; j
< nruns
; ++j
)
5029 struct run
*p
= runs
[j
];
5031 if ((p
->current_y
>= r
->desired_y
5032 && p
->current_y
< r
->desired_y
+ r
->height
)
5033 || (p
->current_y
+ p
->height
>= r
->desired_y
5034 && (p
->current_y
+ p
->height
5035 < r
->desired_y
+ r
->height
)))
5040 /* Assign matrix rows. */
5041 for (j
= 0; j
< r
->nrows
; ++j
)
5043 struct glyph_row
*from
, *to
;
5044 int to_overlapped_p
;
5046 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5047 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5048 to_overlapped_p
= to
->overlapped_p
;
5049 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5050 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5051 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5052 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5053 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5054 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5055 from
->redraw_fringe_bitmaps_p
= 1;
5056 assign_row (to
, from
);
5057 to
->enabled_p
= 1, from
->enabled_p
= 0;
5058 to
->overlapped_p
= to_overlapped_p
;
5062 /* Clear the hash table, for the next time. */
5063 for (i
= 0; i
< row_entry_idx
; ++i
)
5064 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5066 /* Value is > 0 to indicate that we scrolled the display. */
5072 /************************************************************************
5074 ************************************************************************/
5076 /* Update the desired frame matrix of frame F.
5078 FORCE_P non-zero means that the update should not be stopped by
5079 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5080 should not be tried.
5082 Value is non-zero if update was stopped due to pending input. */
5085 update_frame_1 (f
, force_p
, inhibit_id_p
)
5090 /* Frame matrices to work on. */
5091 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5092 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5095 int preempt_count
= baud_rate
/ 2400 + 1;
5096 extern int input_pending
;
5098 xassert (current_matrix
&& desired_matrix
);
5100 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5101 calculate_costs (f
);
5103 if (preempt_count
<= 0)
5106 if (redisplay_dont_pause
)
5108 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5114 /* If we cannot insert/delete lines, it's no use trying it. */
5115 if (!FRAME_LINE_INS_DEL_OK (f
))
5118 /* See if any of the desired lines are enabled; don't compute for
5119 i/d line if just want cursor motion. */
5120 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5121 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5124 /* Try doing i/d line, if not yet inhibited. */
5125 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5126 force_p
|= scrolling (f
);
5128 /* Update the individual lines as needed. Do bottom line first. */
5129 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5130 update_frame_line (f
, desired_matrix
->nrows
- 1);
5132 /* Now update the rest of the lines. */
5133 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5135 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5137 if (FRAME_TERMCAP_P (f
))
5139 /* Flush out every so many lines.
5140 Also flush out if likely to have more than 1k buffered
5141 otherwise. I'm told that some telnet connections get
5142 really screwed by more than 1k output at once. */
5143 int outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
)->output
);
5145 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5147 fflush (FRAME_TTY (f
)->output
);
5148 if (preempt_count
== 1)
5150 #ifdef EMACS_OUTQSIZE
5151 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5152 /* Probably not a tty. Ignore the error and reset
5154 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5157 if (baud_rate
<= outq
&& baud_rate
> 0)
5158 sleep (outq
/ baud_rate
);
5163 if ((i
- 1) % preempt_count
== 0)
5164 detect_input_pending_ignore_squeezables ();
5166 update_frame_line (f
, i
);
5170 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5172 /* Now just clean up termcap drivers and set cursor, etc. */
5175 if ((cursor_in_echo_area
5176 /* If we are showing a message instead of the mini-buffer,
5177 show the cursor for the message instead of for the
5178 (now hidden) mini-buffer contents. */
5179 || (EQ (minibuf_window
, selected_window
)
5180 && EQ (minibuf_window
, echo_area_window
)
5181 && !NILP (echo_area_buffer
[0])))
5182 /* These cases apply only to the frame that contains
5183 the active mini-buffer window. */
5184 && FRAME_HAS_MINIBUF_P (f
)
5185 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5187 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5190 if (cursor_in_echo_area
< 0)
5192 /* Negative value of cursor_in_echo_area means put
5193 cursor at beginning of line. */
5199 /* Positive value of cursor_in_echo_area means put
5200 cursor at the end of the prompt. If the mini-buffer
5201 is several lines high, find the last line that has
5203 row
= FRAME_LINES (f
);
5209 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5211 /* Frame rows are filled up with spaces that
5212 must be ignored here. */
5213 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5215 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5216 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5219 && (last
- 1)->charpos
< 0)
5225 while (row
> top
&& col
== 0);
5227 /* Make sure COL is not out of range. */
5228 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5230 /* If we have another row, advance cursor into it. */
5231 if (row
< FRAME_LINES (f
) - 1)
5233 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5236 /* Otherwise move it back in range. */
5238 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5242 cursor_to (f
, row
, col
);
5246 /* We have only one cursor on terminal frames. Use it to
5247 display the cursor of the selected window. */
5248 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5249 if (w
->cursor
.vpos
>= 0
5250 /* The cursor vpos may be temporarily out of bounds
5251 in the following situation: There is one window,
5252 with the cursor in the lower half of it. The window
5253 is split, and a message causes a redisplay before
5254 a new cursor position has been computed. */
5255 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5257 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5258 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5260 if (INTEGERP (w
->left_margin_cols
))
5261 x
+= XFASTINT (w
->left_margin_cols
);
5263 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5264 cursor_to (f
, y
, x
);
5271 clear_desired_matrices (f
);
5276 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5280 struct frame
*frame
;
5282 int unchanged_at_top
, unchanged_at_bottom
;
5285 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5286 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5287 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5288 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5290 int free_at_end_vpos
= FRAME_LINES (frame
);
5291 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5292 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5294 if (!current_matrix
)
5297 /* Compute hash codes of all the lines. Also calculate number of
5298 changed lines, number of unchanged lines at the beginning, and
5299 number of unchanged lines at the end. */
5301 unchanged_at_top
= 0;
5302 unchanged_at_bottom
= FRAME_LINES (frame
);
5303 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5305 /* Give up on this scrolling if some old lines are not enabled. */
5306 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5308 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5309 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5311 /* This line cannot be redrawn, so don't let scrolling mess it. */
5312 new_hash
[i
] = old_hash
[i
];
5313 #define INFINITY 1000000 /* Taken from scroll.c */
5314 draw_cost
[i
] = INFINITY
;
5318 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5319 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5322 if (old_hash
[i
] != new_hash
[i
])
5325 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5327 else if (i
== unchanged_at_top
)
5329 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5332 /* If changed lines are few, don't allow preemption, don't scroll. */
5333 if ((!FRAME_SCROLL_REGION_OK (frame
)
5334 && changed_lines
< baud_rate
/ 2400)
5335 || unchanged_at_bottom
== FRAME_LINES (frame
))
5338 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5339 - unchanged_at_bottom
);
5341 if (FRAME_SCROLL_REGION_OK (frame
))
5342 free_at_end_vpos
-= unchanged_at_bottom
;
5343 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5344 free_at_end_vpos
= -1;
5346 /* If large window, fast terminal and few lines in common between
5347 current frame and desired frame, don't bother with i/d calc. */
5348 if (!FRAME_SCROLL_REGION_OK (frame
)
5349 && window_size
>= 18 && baud_rate
> 2400
5351 10 * scrolling_max_lines_saved (unchanged_at_top
,
5352 FRAME_LINES (frame
) - unchanged_at_bottom
,
5353 old_hash
, new_hash
, draw_cost
)))
5356 if (window_size
< 2)
5359 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5360 draw_cost
+ unchanged_at_top
- 1,
5361 old_draw_cost
+ unchanged_at_top
- 1,
5362 old_hash
+ unchanged_at_top
- 1,
5363 new_hash
+ unchanged_at_top
- 1,
5364 free_at_end_vpos
- unchanged_at_top
);
5370 /* Count the number of blanks at the start of the vector of glyphs R
5371 which is LEN glyphs long. */
5374 count_blanks (r
, len
)
5380 for (i
= 0; i
< len
; ++i
)
5381 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5388 /* Count the number of glyphs in common at the start of the glyph
5389 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5390 of STR2. Value is the number of equal glyphs equal at the start. */
5393 count_match (str1
, end1
, str2
, end2
)
5394 struct glyph
*str1
, *end1
, *str2
, *end2
;
5396 struct glyph
*p1
= str1
;
5397 struct glyph
*p2
= str2
;
5401 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5408 /* Char insertion/deletion cost vector, from term.c */
5410 extern int *char_ins_del_vector
;
5411 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5414 /* Perform a frame-based update on line VPOS in frame FRAME. */
5417 update_frame_line (f
, vpos
)
5421 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5423 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5424 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5425 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5426 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5427 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5428 int must_write_whole_line_p
;
5429 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5430 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5431 != FACE_TTY_DEFAULT_BG_COLOR
);
5433 if (colored_spaces_p
)
5436 /* Current row not enabled means it has unknown contents. We must
5437 write the whole desired line in that case. */
5438 must_write_whole_line_p
= !current_row
->enabled_p
;
5439 if (must_write_whole_line_p
)
5446 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5447 olen
= current_row
->used
[TEXT_AREA
];
5449 /* Ignore trailing spaces, if we can. */
5450 if (!write_spaces_p
)
5451 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5455 current_row
->enabled_p
= 1;
5456 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5458 /* If desired line is empty, just clear the line. */
5459 if (!desired_row
->enabled_p
)
5465 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5466 nlen
= desired_row
->used
[TEXT_AREA
];
5467 nend
= nbody
+ nlen
;
5469 /* If display line has unknown contents, write the whole line. */
5470 if (must_write_whole_line_p
)
5472 /* Ignore spaces at the end, if we can. */
5473 if (!write_spaces_p
)
5474 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5477 /* Write the contents of the desired line. */
5480 cursor_to (f
, vpos
, 0);
5481 write_glyphs (f
, nbody
, nlen
);
5484 /* Don't call clear_end_of_line if we already wrote the whole
5485 line. The cursor will not be at the right margin in that
5486 case but in the line below. */
5487 if (nlen
< FRAME_TOTAL_COLS (f
))
5489 cursor_to (f
, vpos
, nlen
);
5490 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5493 /* Make sure we are in the right row, otherwise cursor movement
5494 with cmgoto might use `ch' in the wrong row. */
5495 cursor_to (f
, vpos
, 0);
5497 make_current (desired_matrix
, current_matrix
, vpos
);
5501 /* Pretend trailing spaces are not there at all,
5502 unless for one reason or another we must write all spaces. */
5503 if (!write_spaces_p
)
5504 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5507 /* If there's no i/d char, quickly do the best we can without it. */
5508 if (!FRAME_CHAR_INS_DEL_OK (f
))
5512 /* Find the first glyph in desired row that doesn't agree with
5513 a glyph in the current row, and write the rest from there on. */
5514 for (i
= 0; i
< nlen
; i
++)
5516 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5518 /* Find the end of the run of different glyphs. */
5522 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5523 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5526 /* Output this run of non-matching chars. */
5527 cursor_to (f
, vpos
, i
);
5528 write_glyphs (f
, nbody
+ i
, j
- i
);
5531 /* Now find the next non-match. */
5535 /* Clear the rest of the line, or the non-clear part of it. */
5538 cursor_to (f
, vpos
, nlen
);
5539 clear_end_of_line (f
, olen
);
5542 /* Make current row = desired row. */
5543 make_current (desired_matrix
, current_matrix
, vpos
);
5547 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5548 characters in a row. */
5552 /* If current line is blank, skip over initial spaces, if
5553 possible, and write the rest. */
5557 nsp
= count_blanks (nbody
, nlen
);
5561 cursor_to (f
, vpos
, nsp
);
5562 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5565 /* Exchange contents between current_frame and new_frame. */
5566 make_current (desired_matrix
, current_matrix
, vpos
);
5570 /* Compute number of leading blanks in old and new contents. */
5571 osp
= count_blanks (obody
, olen
);
5572 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5574 /* Compute number of matching chars starting with first non-blank. */
5575 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5576 nbody
+ nsp
, nbody
+ nlen
);
5578 /* Spaces in new match implicit space past the end of old. */
5579 /* A bug causing this to be a no-op was fixed in 18.29. */
5580 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5583 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5587 /* Avoid doing insert/delete char
5588 just cause number of leading spaces differs
5589 when the following text does not match. */
5590 if (begmatch
== 0 && osp
!= nsp
)
5591 osp
= nsp
= min (osp
, nsp
);
5593 /* Find matching characters at end of line */
5596 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5598 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5603 endmatch
= obody
+ olen
- op1
;
5605 /* tem gets the distance to insert or delete.
5606 endmatch is how many characters we save by doing so.
5609 tem
= (nlen
- nsp
) - (olen
- osp
);
5611 && (!FRAME_CHAR_INS_DEL_OK (f
)
5612 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5615 /* nsp - osp is the distance to insert or delete.
5616 If that is nonzero, begmatch is known to be nonzero also.
5617 begmatch + endmatch is how much we save by doing the ins/del.
5621 && (!FRAME_CHAR_INS_DEL_OK (f
)
5622 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5626 osp
= nsp
= min (osp
, nsp
);
5629 /* Now go through the line, inserting, writing and
5630 deleting as appropriate. */
5634 cursor_to (f
, vpos
, nsp
);
5635 delete_glyphs (f
, osp
- nsp
);
5639 /* If going to delete chars later in line
5640 and insert earlier in the line,
5641 must delete first to avoid losing data in the insert */
5642 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5644 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5645 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5646 olen
= nlen
- (nsp
- osp
);
5648 cursor_to (f
, vpos
, osp
);
5649 insert_glyphs (f
, 0, nsp
- osp
);
5653 tem
= nsp
+ begmatch
+ endmatch
;
5654 if (nlen
!= tem
|| olen
!= tem
)
5656 if (!endmatch
|| nlen
== olen
)
5658 /* If new text being written reaches right margin, there is
5659 no need to do clear-to-eol at the end of this function
5660 (and it would not be safe, since cursor is not going to
5661 be "at the margin" after the text is done). */
5662 if (nlen
== FRAME_TOTAL_COLS (f
))
5665 /* Function write_glyphs is prepared to do nothing
5666 if passed a length <= 0. Check it here to avoid
5667 unnecessary cursor movement. */
5670 cursor_to (f
, vpos
, nsp
+ begmatch
);
5671 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5674 else if (nlen
> olen
)
5676 /* Here, we used to have the following simple code:
5677 ----------------------------------------
5678 write_glyphs (nbody + nsp + begmatch, olen - tem);
5679 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5680 ----------------------------------------
5681 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5682 is a padding glyph. */
5683 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5686 cursor_to (f
, vpos
, nsp
+ begmatch
);
5688 /* Calculate columns we can actually overwrite. */
5689 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5691 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5693 /* If we left columns to be overwritten, we must delete them. */
5694 del
= olen
- tem
- out
;
5696 delete_glyphs (f
, del
);
5698 /* At last, we insert columns not yet written out. */
5699 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5702 else if (olen
> nlen
)
5704 cursor_to (f
, vpos
, nsp
+ begmatch
);
5705 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5706 delete_glyphs (f
, olen
- nlen
);
5712 /* If any unerased characters remain after the new line, erase them. */
5715 cursor_to (f
, vpos
, nlen
);
5716 clear_end_of_line (f
, olen
);
5719 /* Exchange contents between current_frame and new_frame. */
5720 make_current (desired_matrix
, current_matrix
, vpos
);
5725 /***********************************************************************
5726 X/Y Position -> Buffer Position
5727 ***********************************************************************/
5729 /* Determine what's under window-relative pixel position (*X, *Y).
5730 Return the object (string or buffer) that's there.
5731 Return in *POS the position in that object.
5732 Adjust *X and *Y to character positions. */
5735 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5738 struct display_pos
*pos
;
5739 Lisp_Object
*object
;
5741 int *width
, *height
;
5744 struct buffer
*old_current_buffer
= current_buffer
;
5745 struct text_pos startp
;
5747 struct glyph_row
*row
;
5748 #ifdef HAVE_WINDOW_SYSTEM
5749 struct image
*img
= 0;
5753 current_buffer
= XBUFFER (w
->buffer
);
5754 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5755 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5756 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5757 start_display (&it
, w
, startp
);
5759 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5760 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5761 MOVE_TO_X
| MOVE_TO_Y
);
5763 current_buffer
= old_current_buffer
;
5765 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5766 *dy
= *y
- it
.current_y
;
5769 if (STRINGP (it
.string
))
5773 #ifdef HAVE_WINDOW_SYSTEM
5774 if (it
.what
== IT_IMAGE
)
5776 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5777 && !NILP (img
->spec
))
5778 *object
= img
->spec
;
5782 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5785 if (it
.hpos
< row
->used
[TEXT_AREA
])
5787 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5788 #ifdef HAVE_WINDOW_SYSTEM
5791 *dy
-= row
->ascent
- glyph
->ascent
;
5792 *dx
+= glyph
->slice
.x
;
5793 *dy
+= glyph
->slice
.y
;
5794 /* Image slices positions are still relative to the entire image */
5795 *width
= img
->width
;
5796 *height
= img
->height
;
5801 *width
= glyph
->pixel_width
;
5802 *height
= glyph
->ascent
+ glyph
->descent
;
5808 *height
= row
->height
;
5813 *width
= *height
= 0;
5816 /* Add extra (default width) columns if clicked after EOL. */
5817 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5819 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5828 /* Value is the string under window-relative coordinates X/Y in the
5829 mode line or header line (PART says which) of window W, or nil if none.
5830 *CHARPOS is set to the position in the string returned. */
5833 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5835 enum window_part part
;
5838 Lisp_Object
*object
;
5840 int *width
, *height
;
5842 struct glyph_row
*row
;
5843 struct glyph
*glyph
, *end
;
5845 Lisp_Object string
= Qnil
;
5847 if (part
== ON_MODE_LINE
)
5848 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5850 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5852 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5854 if (row
->mode_line_p
&& row
->enabled_p
)
5856 /* Find the glyph under X. If we find one with a string object,
5857 it's the one we were looking for. */
5858 glyph
= row
->glyphs
[TEXT_AREA
];
5859 end
= glyph
+ row
->used
[TEXT_AREA
];
5860 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5861 x0
-= glyph
->pixel_width
;
5862 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5865 string
= glyph
->object
;
5866 *charpos
= glyph
->charpos
;
5867 *width
= glyph
->pixel_width
;
5868 *height
= glyph
->ascent
+ glyph
->descent
;
5869 #ifdef HAVE_WINDOW_SYSTEM
5870 if (glyph
->type
== IMAGE_GLYPH
)
5873 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5875 *object
= img
->spec
;
5876 y0
-= row
->ascent
- glyph
->ascent
;
5882 /* Add extra (default width) columns if clicked after EOL. */
5883 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5885 *height
= row
->height
;
5892 *width
= *height
= 0;
5902 /* Value is the string under window-relative coordinates X/Y in either
5903 marginal area, or nil if none. *CHARPOS is set to the position in
5904 the string returned. */
5907 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5909 enum window_part part
;
5912 Lisp_Object
*object
;
5914 int *width
, *height
;
5916 struct glyph_row
*row
= w
->current_matrix
->rows
;
5917 struct glyph
*glyph
, *end
;
5918 int x0
, y0
, i
, wy
= *y
;
5920 Lisp_Object string
= Qnil
;
5922 if (part
== ON_LEFT_MARGIN
)
5923 area
= LEFT_MARGIN_AREA
;
5924 else if (part
== ON_RIGHT_MARGIN
)
5925 area
= RIGHT_MARGIN_AREA
;
5929 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5930 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5933 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5937 /* Find the glyph under X. If we find one with a string object,
5938 it's the one we were looking for. */
5939 if (area
== RIGHT_MARGIN_AREA
)
5940 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5941 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5942 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5943 + window_box_width (w
, LEFT_MARGIN_AREA
)
5944 + window_box_width (w
, TEXT_AREA
));
5946 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5947 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5950 glyph
= row
->glyphs
[area
];
5951 end
= glyph
+ row
->used
[area
];
5952 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5953 x0
-= glyph
->pixel_width
;
5954 *x
= glyph
- row
->glyphs
[area
];
5957 string
= glyph
->object
;
5958 *charpos
= glyph
->charpos
;
5959 *width
= glyph
->pixel_width
;
5960 *height
= glyph
->ascent
+ glyph
->descent
;
5961 #ifdef HAVE_WINDOW_SYSTEM
5962 if (glyph
->type
== IMAGE_GLYPH
)
5965 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5967 *object
= img
->spec
;
5968 y0
-= row
->ascent
- glyph
->ascent
;
5969 x0
+= glyph
->slice
.x
;
5970 y0
+= glyph
->slice
.y
;
5976 /* Add extra (default width) columns if clicked after EOL. */
5977 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5979 *height
= row
->height
;
5986 *width
= *height
= 0;
5996 /***********************************************************************
5997 Changing Frame Sizes
5998 ***********************************************************************/
6003 window_change_signal (signalnum
) /* If we don't have an argument, */
6004 int signalnum
; /* some compilers complain in signal calls. */
6010 int old_errno
= errno
;
6012 struct tty_display_info
*tty
;
6014 signal (SIGWINCH
, window_change_signal
);
6015 SIGNAL_THREAD_CHECK (signalnum
);
6017 /* The frame size change obviously applies to a single
6018 termcap-controlled terminal, but we can't decide which.
6019 Therefore, we resize the frames corresponding to each tty.
6021 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6023 if (! tty
->term_initted
)
6026 get_tty_size (fileno (tty
->input
), &width
, &height
);
6029 Lisp_Object tail
, frame
;
6031 FOR_EACH_FRAME (tail
, frame
)
6032 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6033 /* Record the new sizes, but don't reallocate the data
6034 structures now. Let that be done later outside of the
6036 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6042 #endif /* SIGWINCH */
6045 /* Do any change in frame size that was requested by a signal. SAFE
6046 non-zero means this function is called from a place where it is
6047 safe to change frame sizes while a redisplay is in progress. */
6050 do_pending_window_change (safe
)
6053 /* If window_change_signal should have run before, run it now. */
6054 if (redisplaying_p
&& !safe
)
6057 while (delayed_size_change
)
6059 Lisp_Object tail
, frame
;
6061 delayed_size_change
= 0;
6063 FOR_EACH_FRAME (tail
, frame
)
6065 struct frame
*f
= XFRAME (frame
);
6067 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6068 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6075 /* Change the frame height and/or width. Values may be given as zero to
6076 indicate no change is to take place.
6078 If DELAY is non-zero, then assume we're being called from a signal
6079 handler, and queue the change for later - perhaps the next
6080 redisplay. Since this tries to resize windows, we can't call it
6081 from a signal handler.
6083 SAFE non-zero means this function is called from a place where it's
6084 safe to change frame sizes while a redisplay is in progress. */
6087 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6088 register struct frame
*f
;
6089 int newheight
, newwidth
, pretend
, delay
, safe
;
6091 Lisp_Object tail
, frame
;
6093 if (FRAME_MSDOS_P (f
))
6095 /* On MS-DOS, all frames use the same screen, so a change in
6096 size affects all frames. Termcap now supports multiple
6098 FOR_EACH_FRAME (tail
, frame
)
6099 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6100 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6101 pretend
, delay
, safe
);
6104 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6108 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6109 register struct frame
*f
;
6110 int newheight
, newwidth
, pretend
, delay
, safe
;
6112 int new_frame_total_cols
;
6113 int count
= SPECPDL_INDEX ();
6115 /* If we can't deal with the change now, queue it for later. */
6116 if (delay
|| (redisplaying_p
&& !safe
))
6118 f
->new_text_lines
= newheight
;
6119 f
->new_text_cols
= newwidth
;
6120 delayed_size_change
= 1;
6124 /* This size-change overrides any pending one for this frame. */
6125 f
->new_text_lines
= 0;
6126 f
->new_text_cols
= 0;
6128 /* If an argument is zero, set it to the current value. */
6130 newheight
= FRAME_LINES (f
);
6132 newwidth
= FRAME_COLS (f
);
6134 /* Compute width of windows in F.
6135 This is the width of the frame without vertical scroll bars. */
6136 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6138 /* Round up to the smallest acceptable size. */
6139 check_frame_size (f
, &newheight
, &newwidth
);
6141 /* If we're not changing the frame size, quit now. */
6142 if (newheight
== FRAME_LINES (f
)
6143 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6149 /* We only can set screen dimensions to certain values supported
6150 by our video hardware. Try to find the smallest size greater
6151 or equal to the requested dimensions. */
6152 dos_set_window_size (&newheight
, &newwidth
);
6155 if (newheight
!= FRAME_LINES (f
))
6157 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6159 /* Frame has both root and mini-buffer. */
6160 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6161 FRAME_TOP_MARGIN (f
));
6162 set_window_height (FRAME_ROOT_WINDOW (f
),
6165 - FRAME_TOP_MARGIN (f
)),
6167 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6169 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6172 /* Frame has just one top-level window. */
6173 set_window_height (FRAME_ROOT_WINDOW (f
),
6174 newheight
- FRAME_TOP_MARGIN (f
), 0);
6176 if (FRAME_TERMCAP_P (f
) && !pretend
)
6177 FrameRows (FRAME_TTY (f
)) = newheight
;
6180 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6182 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6183 if (FRAME_HAS_MINIBUF_P (f
))
6184 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6186 if (FRAME_TERMCAP_P (f
) && !pretend
)
6187 FrameCols (FRAME_TTY (f
)) = newwidth
;
6189 if (WINDOWP (f
->tool_bar_window
))
6190 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6193 FRAME_LINES (f
) = newheight
;
6194 SET_FRAME_COLS (f
, newwidth
);
6197 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6198 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6200 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6202 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6203 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6204 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6205 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6209 calculate_costs (f
);
6210 SET_FRAME_GARBAGED (f
);
6215 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6217 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6218 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6219 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6221 unbind_to (count
, Qnil
);
6226 /***********************************************************************
6227 Terminal Related Lisp Functions
6228 ***********************************************************************/
6230 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6231 1, 1, "FOpen termscript file: ",
6232 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6233 FILE = nil means just close any termscript file currently open. */)
6237 struct tty_display_info
*tty
;
6239 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6240 error ("Current frame is not on a tty device");
6244 if (tty
->termscript
!= 0)
6245 fclose (tty
->termscript
);
6246 tty
->termscript
= 0;
6250 file
= Fexpand_file_name (file
, Qnil
);
6251 tty
->termscript
= fopen (SDATA (file
), "w");
6252 if (tty
->termscript
== 0)
6253 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6259 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6260 Ssend_string_to_terminal
, 1, 1, 0,
6261 doc
: /* Send STRING to the terminal without alteration.
6262 Control characters in STRING will have terminal-dependent effects. */)
6266 struct tty_display_info
*tty
;
6268 /* ??? Perhaps we should do something special for multibyte strings here. */
6269 CHECK_STRING (string
);
6271 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6272 error ("Current frame is not on a tty device");
6276 if (tty
->termscript
)
6278 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6279 fflush (tty
->termscript
);
6281 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->output
);
6282 fflush (tty
->output
);
6287 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6288 doc
: /* Beep, or flash the screen.
6289 Also, unless an argument is given,
6290 terminate any keyboard macro currently executing. */)
6299 ring_bell (XFRAME (selected_frame
));
6312 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6313 error ("Keyboard macro terminated by a command ringing the bell");
6315 ring_bell (XFRAME (selected_frame
));
6320 /***********************************************************************
6322 ***********************************************************************/
6324 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6325 doc
: /* Pause, without updating display, for SECONDS seconds.
6326 SECONDS may be a floating-point value, meaning that you can wait for a
6327 fraction of a second. Optional second arg MILLISECONDS specifies an
6328 additional wait period, in milliseconds; this may be useful if your
6329 Emacs was built without floating point support.
6330 \(Not all operating systems support waiting for a fraction of a second.) */)
6331 (seconds
, milliseconds
)
6332 Lisp_Object seconds
, milliseconds
;
6336 if (NILP (milliseconds
))
6337 XSETINT (milliseconds
, 0);
6339 CHECK_NUMBER (milliseconds
);
6340 usec
= XINT (milliseconds
) * 1000;
6343 double duration
= extract_float (seconds
);
6344 sec
= (int) duration
;
6345 usec
+= (duration
- sec
) * 1000000;
6348 #ifndef EMACS_HAS_USECS
6349 if (sec
== 0 && usec
!= 0)
6350 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6353 /* Assure that 0 <= usec < 1000000. */
6356 /* We can't rely on the rounding being correct if usec is negative. */
6357 if (-1000000 < usec
)
6358 sec
--, usec
+= 1000000;
6360 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6363 sec
+= usec
/ 1000000, usec
%= 1000000;
6365 if (sec
< 0 || (sec
== 0 && usec
== 0))
6368 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6374 /* This is just like wait_reading_process_output, except that
6375 it does the redisplay.
6377 It's also much like Fsit_for, except that it can be used for
6378 waiting for input as well. */
6381 sit_for (sec
, usec
, reading
, display
, initial_display
)
6382 int sec
, usec
, reading
, display
, initial_display
;
6384 swallow_events (display
);
6386 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6389 if (initial_display
)
6390 redisplay_preserve_echo_area (2);
6392 if (sec
== 0 && usec
== 0)
6399 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6402 return detect_input_pending () ? Qnil
: Qt
;
6406 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6407 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6408 SECONDS may be a floating-point value, meaning that you can wait for a
6409 fraction of a second.
6410 \(Not all operating systems support waiting for a fraction of a second.)
6411 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6412 Redisplay is preempted as always if input arrives, and does not happen
6413 if input is available before it starts.
6414 Value is t if waited the full time with no input arriving.
6416 An obsolete but still supported form is
6417 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6418 Where the optional arg MILLISECONDS specifies an additional wait period,
6419 in milliseconds; this was useful when Emacs was built without
6420 floating point support.
6421 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6423 /* The `old-nodisp' stuff is there so that the arglist has the correct
6424 length. Otherwise, `defdvice' will redefine it with fewer args. */
6425 (seconds
, milliseconds
, nodisp
)
6426 Lisp_Object seconds
, milliseconds
, nodisp
;
6430 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6432 nodisp
= milliseconds
;
6433 milliseconds
= Qnil
;
6436 if (NILP (milliseconds
))
6437 XSETINT (milliseconds
, 0);
6439 CHECK_NUMBER (milliseconds
);
6440 usec
= XINT (milliseconds
) * 1000;
6443 double duration
= extract_float (seconds
);
6444 sec
= (int) duration
;
6445 usec
+= (duration
- sec
) * 1000000;
6448 #ifndef EMACS_HAS_USECS
6449 if (usec
!= 0 && sec
== 0)
6450 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6453 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6458 /***********************************************************************
6459 Other Lisp Functions
6460 ***********************************************************************/
6462 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6463 session's frames, frame names, buffers, buffer-read-only flags, and
6464 buffer-modified-flags, and a trailing sentinel (so we don't need to
6465 add length checks). */
6467 static Lisp_Object frame_and_buffer_state
;
6470 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6471 Sframe_or_buffer_changed_p
, 0, 0, 0,
6472 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6473 The state variable is an internal vector containing all frames and buffers,
6474 aside from buffers whose names start with space,
6475 along with the buffers' read-only and modified flags, which allows a fast
6476 check to see whether the menu bars might need to be recomputed.
6477 If this function returns non-nil, it updates the internal vector to reflect
6478 the current state. */)
6481 Lisp_Object tail
, frame
, buf
;
6485 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6486 FOR_EACH_FRAME (tail
, frame
)
6488 if (!EQ (*vecp
++, frame
))
6490 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6493 /* Check that the buffer info matches.
6494 No need to test for the end of the vector
6495 because the last element of the vector is lambda
6496 and that will always cause a mismatch. */
6497 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6499 buf
= XCDR (XCAR (tail
));
6500 /* Ignore buffers that aren't included in buffer lists. */
6501 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6503 if (!EQ (*vecp
++, buf
))
6505 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6507 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6510 /* Detect deletion of a buffer at the end of the list. */
6511 if (EQ (*vecp
, Qlambda
))
6514 /* Start with 1 so there is room for at least one lambda at the end. */
6516 FOR_EACH_FRAME (tail
, frame
)
6518 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6520 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6521 if (n
> XVECTOR (frame_and_buffer_state
)->size
6522 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6523 /* Add 20 extra so we grow it less often. */
6524 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6525 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6526 FOR_EACH_FRAME (tail
, frame
)
6529 *vecp
++ = XFRAME (frame
)->name
;
6531 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6533 buf
= XCDR (XCAR (tail
));
6534 /* Ignore buffers that aren't included in buffer lists. */
6535 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6538 *vecp
++ = XBUFFER (buf
)->read_only
;
6539 *vecp
++ = Fbuffer_modified_p (buf
);
6541 /* Fill up the vector with lambdas (always at least one). */
6543 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6544 < XVECTOR (frame_and_buffer_state
)->size
)
6546 /* Make sure we didn't overflow the vector. */
6547 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6548 > XVECTOR (frame_and_buffer_state
)->size
)
6555 /***********************************************************************
6557 ***********************************************************************/
6559 /* Initialization done when Emacs fork is started, before doing stty.
6560 Determine terminal type and set terminal_driver. Then invoke its
6561 decoding routine to set up variables in the terminal package. */
6566 char *terminal_type
;
6568 #ifdef HAVE_X_WINDOWS
6569 extern int display_arg
;
6572 /* Construct the space glyph. */
6573 space_glyph
.type
= CHAR_GLYPH
;
6574 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6575 space_glyph
.charpos
= -1;
6578 cursor_in_echo_area
= 0;
6579 terminal_type
= (char *) 0;
6581 /* Now is the time to initialize this; it's used by init_sys_modes
6583 Vinitial_window_system
= Qnil
;
6585 /* SIGWINCH needs to be handled no matter what display we start
6586 with. Otherwise newly opened tty frames will not resize
6591 #endif /* CANNOT_DUMP */
6592 signal (SIGWINCH
, window_change_signal
);
6593 #endif /* SIGWINCH */
6595 /* If the user wants to use a window system, we shouldn't bother
6596 initializing the terminal. This is especially important when the
6597 terminal is so dumb that emacs gives up before and doesn't bother
6598 using the window system.
6600 If the DISPLAY environment variable is set and nonempty,
6601 try to use X, and die with an error message if that doesn't work. */
6603 #ifdef HAVE_X_WINDOWS
6608 display
= getenv ("DECW$DISPLAY");
6610 display
= getenv ("DISPLAY");
6613 display_arg
= (display
!= 0 && *display
!= 0);
6616 if (!inhibit_window_system
&& display_arg
6622 Vinitial_window_system
= intern ("x");
6624 Vwindow_system_version
= make_number (11);
6626 Vwindow_system_version
= make_number (10);
6628 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6629 /* In some versions of ncurses,
6630 tputs crashes if we have not called tgetent.
6632 { char b
[2044]; tgetent (b
, "xterm");}
6634 adjust_frame_glyphs_initially ();
6637 #endif /* HAVE_X_WINDOWS */
6640 if (!inhibit_window_system
)
6642 Vinitial_window_system
= intern ("w32");
6643 Vwindow_system_version
= make_number (1);
6644 adjust_frame_glyphs_initially ();
6647 #endif /* HAVE_NTGUI */
6650 if (!inhibit_window_system
)
6652 Vinitial_window_system
= intern ("mac");
6653 Vwindow_system_version
= make_number (1);
6654 adjust_frame_glyphs_initially ();
6659 /* If no window system has been specified, try to use the terminal. */
6662 fatal ("standard input is not a tty");
6666 /* Look at the TERM variable. */
6667 terminal_type
= (char *) getenv ("TERM");
6671 fprintf (stderr
, "Please specify your terminal type.\n\
6672 For types defined in VMS, use set term /device=TYPE.\n\
6673 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6674 \(The quotation marks are necessary since terminal types are lower case.)\n");
6676 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6682 /* VMS DCL tends to up-case things, so down-case term type.
6683 Hardly any uppercase letters in terminal types; should be none. */
6685 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6688 strcpy (new, terminal_type
);
6690 for (p
= new; *p
; p
++)
6694 terminal_type
= new;
6700 struct frame
*f
= XFRAME (selected_frame
);
6702 /* Open a display on the controlling tty. */
6703 d
= term_init (0, terminal_type
, 1); /* Errors are fatal. */
6705 /* Convert the initial frame to use the new display. */
6706 if (f
->output_method
!= output_initial
)
6708 f
->output_method
= d
->type
;
6711 f
->kboard
= d
->display_info
.tty
->kboard
;
6714 d
->reference_count
++;
6715 d
->display_info
.tty
->top_frame
= selected_frame
;
6716 change_frame_size (XFRAME (selected_frame
), FrameRows (d
->display_info
.tty
), FrameCols (d
->display_info
.tty
), 0, 0, 1);
6718 /* Delete the initial display. */
6719 if (--initial_display
->reference_count
== 0
6720 && initial_display
->delete_display_hook
)
6721 (*initial_display
->delete_display_hook
) (initial_display
);
6723 /* Update frame parameters to reflect the new type. */
6724 Fmodify_frame_parameters
6725 (selected_frame
, Fcons (Fcons (Qtty_type
,
6726 Fdisplay_tty_type (selected_frame
)), Qnil
));
6730 struct frame
*sf
= SELECTED_FRAME ();
6731 int width
= FRAME_TOTAL_COLS (sf
);
6732 int height
= FRAME_LINES (sf
);
6734 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6736 /* If these sizes are so big they cause overflow, just ignore the
6737 change. It's not clear what better we could do. */
6738 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6739 fatal ("screen size %dx%d too big", width
, height
);
6742 adjust_frame_glyphs_initially ();
6743 calculate_costs (XFRAME (selected_frame
));
6745 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6749 /* The MSDOS terminal turns on its ``window system'' relatively
6750 late into the startup, so we cannot do the frame faces'
6751 initialization just yet. It will be done later by pc-win.el
6752 and internal_terminal_init. */
6753 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6755 && NILP (Vinitial_window_system
))
6757 /* For the initial frame, we don't have any way of knowing what
6758 are the foreground and background colors of the terminal. */
6759 struct frame
*sf
= SELECTED_FRAME();
6761 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6762 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6763 call0 (intern ("tty-set-up-initial-frame-faces"));
6769 /***********************************************************************
6771 ***********************************************************************/
6773 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6774 Sinternal_show_cursor
, 2, 2, 0,
6775 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6776 WINDOW nil means use the selected window. SHOW non-nil means
6777 show a cursor in WINDOW in the next redisplay. SHOW nil means
6778 don't show a cursor. */)
6780 Lisp_Object window
, show
;
6782 /* Don't change cursor state while redisplaying. This could confuse
6784 if (!redisplaying_p
)
6787 window
= selected_window
;
6789 CHECK_WINDOW (window
);
6791 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6798 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6799 Sinternal_show_cursor_p
, 0, 1, 0,
6800 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6801 WINDOW nil or omitted means report on the selected window. */)
6808 window
= selected_window
;
6810 CHECK_WINDOW (window
);
6812 w
= XWINDOW (window
);
6813 return w
->cursor_off_p
? Qnil
: Qt
;
6817 /***********************************************************************
6819 ***********************************************************************/
6824 defsubr (&Sredraw_frame
);
6825 defsubr (&Sredraw_display
);
6826 defsubr (&Sframe_or_buffer_changed_p
);
6827 defsubr (&Sopen_termscript
);
6829 defsubr (&Ssit_for
);
6830 defsubr (&Ssleep_for
);
6831 defsubr (&Ssend_string_to_terminal
);
6832 defsubr (&Sinternal_show_cursor
);
6833 defsubr (&Sinternal_show_cursor_p
);
6836 defsubr (&Sdump_redisplay_history
);
6839 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6840 staticpro (&frame_and_buffer_state
);
6842 Qdisplay_table
= intern ("display-table");
6843 staticpro (&Qdisplay_table
);
6844 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6845 staticpro (&Qredisplay_dont_pause
);
6847 DEFVAR_INT ("baud-rate", &baud_rate
,
6848 doc
: /* *The output baud rate of the terminal.
6849 On most systems, changing this value will affect the amount of padding
6850 and the other strategic decisions made during redisplay. */);
6852 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6853 doc
: /* *Non-nil means invert the entire frame display.
6854 This means everything is in inverse video which otherwise would not be. */);
6856 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6857 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6859 See also `ring-bell-function'. */);
6861 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6862 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6863 A non-nil value is useful if the terminal can automatically preserve
6864 Emacs's frame display when you reenter Emacs.
6865 It is up to you to set this variable if your terminal can do that. */);
6867 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6868 doc
: /* Name of the window system that Emacs uses for the first frame.
6869 The value is a symbol--for instance, `x' for X windows.
6870 The value is nil if Emacs is using a text-only terminal. */);
6872 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6873 doc
: /* The version number of the window system in use.
6874 For X windows, this is 10 or 11. */);
6876 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6877 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6879 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6880 doc
: /* Table defining how to output a glyph code to the frame.
6881 If not nil, this is a vector indexed by glyph code to define the glyph.
6882 Each element can be:
6883 integer: a glyph code which this glyph is an alias for.
6884 string: output this glyph using that string (not impl. in X windows).
6885 nil: this glyph mod 524288 is the code of a character to output,
6886 and this glyph / 524288 is the face number (see `face-id') to use
6887 while outputting it. */);
6888 Vglyph_table
= Qnil
;
6890 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6891 doc
: /* Display table to use for buffers that specify none.
6892 See `buffer-display-table' for more information. */);
6893 Vstandard_display_table
= Qnil
;
6895 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6896 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6897 redisplay_dont_pause
= 0;
6899 /* Initialize `window-system', unless init_display already decided it. */
6904 Vinitial_window_system
= Qnil
;
6905 Vwindow_system_version
= Qnil
;
6909 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6910 (do not change this comment) */