1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.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 */
65 #endif /* macintosh */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define min(a, b) ((a) < (b) ? (a) : (b))
81 /* Get number of chars of output now in the buffer of a stdio stream.
82 This ought to be built in in stdio, but it isn't. Some s- files
83 override this because their stdio internals differ. */
85 #ifdef __GNU_LIBRARY__
87 /* The s- file might have overridden the definition with one that
88 works for the system's C library. But we are using the GNU C
89 library, so this is the right definition for every system. */
91 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
94 #undef PENDING_OUTPUT_COUNT
95 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
97 #else /* not __GNU_LIBRARY__ */
98 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
99 #include <stdio_ext.h>
100 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
102 #ifndef PENDING_OUTPUT_COUNT
103 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
105 #endif /* not __GNU_LIBRARY__ */
107 #if defined(HAVE_TERM_H) && defined (LINUX) && defined (HAVE_LIBNCURSES)
108 #include <term.h> /* for tgetent */
111 /* Structure to pass dimensions around. Used for character bounding
112 boxes, glyph matrix dimensions and alike. */
121 /* Function prototypes. */
123 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
124 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
125 static void fake_current_matrices
P_ ((Lisp_Object
));
126 static void redraw_overlapping_rows
P_ ((struct window
*, int));
127 static void redraw_overlapped_rows
P_ ((struct window
*, int));
128 static int count_blanks
P_ ((struct glyph
*, int));
129 static int count_match
P_ ((struct glyph
*, struct glyph
*,
130 struct glyph
*, struct glyph
*));
131 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
132 static void update_frame_line
P_ ((struct frame
*, int));
133 static struct dim allocate_matrices_for_frame_redisplay
134 P_ ((Lisp_Object
, int, int, struct dim
, int, int *));
135 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*,
137 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
138 static void adjust_frame_glyphs
P_ ((struct frame
*));
139 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
140 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
141 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
142 int, int, struct dim
));
143 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
144 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
146 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
148 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
149 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
151 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
153 static struct glyph_pool
*new_glyph_pool
P_ ((void));
154 static void free_glyph_pool
P_ ((struct glyph_pool
*));
155 static void adjust_frame_glyphs_initially
P_ ((void));
156 static void adjust_frame_message_buffer
P_ ((struct frame
*));
157 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
158 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
159 static void build_frame_matrix
P_ ((struct frame
*));
160 void clear_current_matrices
P_ ((struct frame
*));
161 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
163 static void clear_window_matrices
P_ ((struct window
*, int));
164 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
165 static int scrolling_window
P_ ((struct window
*, int));
166 static int update_window_line
P_ ((struct window
*, int, int *));
167 static void update_marginal_area
P_ ((struct window
*, int, int));
168 static int update_text_area
P_ ((struct window
*, int));
169 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
171 static void mirror_make_current
P_ ((struct window
*, int));
172 void check_window_matrix_pointers
P_ ((struct window
*));
174 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
175 struct glyph_matrix
*));
177 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
178 static int update_window_tree
P_ ((struct window
*, int));
179 static int update_window
P_ ((struct window
*, int));
180 static int update_frame_1
P_ ((struct frame
*, int, int));
181 static void set_window_cursor_after_update
P_ ((struct window
*));
182 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
183 struct glyph_row
*, int));
184 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
185 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
186 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
187 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
188 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
189 struct window
*frame_row_to_window
P_ ((struct window
*, int));
192 /* Non-zero means don't pause redisplay for pending input. (This is
193 for debugging and for a future implementation of EDT-like
196 int redisplay_dont_pause
;
198 /* Nonzero upon entry to redisplay means do not assume anything about
199 current contents of actual terminal frame; clear and redraw it. */
203 /* Nonzero means last display completed. Zero means it was preempted. */
205 int display_completed
;
207 /* Lisp variable visible-bell; enables use of screen-flash instead of
212 /* Invert the color of the whole frame, at a low level. */
216 /* Line speed of the terminal. */
220 /* Either nil or a symbol naming the window system under which Emacs
223 Lisp_Object Vwindow_system
;
225 /* Version number of X windows: 10, 11 or nil. */
227 Lisp_Object Vwindow_system_version
;
229 /* Vector of glyph definitions. Indexed by glyph number, the contents
230 are a string which is how to output the glyph.
232 If Vglyph_table is nil, a glyph is output by using its low 8 bits
235 This is an obsolete feature that is no longer used. The variable
236 is retained for compatibility. */
238 Lisp_Object Vglyph_table
;
240 /* Display table to use for vectors that don't specify their own. */
242 Lisp_Object Vstandard_display_table
;
244 /* Nonzero means reading single-character input with prompt so put
245 cursor on mini-buffer after the prompt. positive means at end of
246 text in echo area; negative means at beginning of line. */
248 int cursor_in_echo_area
;
250 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
253 /* The currently selected frame. In a single-frame version, this
254 variable always equals the_only_frame. */
256 Lisp_Object selected_frame
;
258 /* A frame which is not just a mini-buffer, or 0 if there are no such
259 frames. This is usually the most recent such frame that was
260 selected. In a single-frame version, this variable always holds
261 the address of the_only_frame. */
263 struct frame
*last_nonminibuf_frame
;
265 /* Stdio stream being used for copy of all output. */
269 /* Structure for info on cursor positioning. */
273 /* 1 means SIGWINCH happened when not safe. */
275 int delayed_size_change
;
277 /* 1 means glyph initialization has been completed at startup. */
279 static int glyphs_initialized_initially_p
;
281 /* Updated window if != 0. Set by update_window. */
283 struct window
*updated_window
;
285 /* Glyph row updated in update_window_line, and area that is updated. */
287 struct glyph_row
*updated_row
;
290 /* A glyph for a space. */
292 struct glyph space_glyph
;
294 /* Non-zero means update has been performed directly, so that there's
295 no need for redisplay_internal to do much work. Set by
296 direct_output_for_insert. */
298 int redisplay_performed_directly_p
;
300 /* Counts of allocated structures. These counts serve to diagnose
301 memory leaks and double frees. */
303 int glyph_matrix_count
;
304 int glyph_pool_count
;
306 /* If non-null, the frame whose frame matrices are manipulated. If
307 null, window matrices are worked on. */
309 static struct frame
*frame_matrix_frame
;
311 /* Current interface for window-based redisplay. Set from init_xterm.
312 A null value means we are not using window-based redisplay. */
314 struct redisplay_interface
*rif
;
316 /* Non-zero means that fonts have been loaded since the last glyph
317 matrix adjustments. Redisplay must stop, and glyph matrices must
318 be adjusted when this flag becomes non-zero during display. The
319 reason fonts can be loaded so late is that fonts of fontsets are
324 /* Convert vpos and hpos from frame to window and vice versa.
325 This may only be used for terminal frames. */
329 static int window_to_frame_vpos
P_ ((struct window
*, int));
330 static int window_to_frame_hpos
P_ ((struct window
*, int));
331 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
332 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
334 /* One element of the ring buffer containing redisplay history
337 struct redisplay_history
339 char trace
[512 + 100];
342 /* The size of the history buffer. */
344 #define REDISPLAY_HISTORY_SIZE 30
346 /* The redisplay history buffer. */
348 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
350 /* Next free entry in redisplay_history. */
352 static int history_idx
;
354 /* A tick that's incremented each time something is added to the
357 static unsigned history_tick
;
359 static void add_frame_display_history
P_ ((struct frame
*, int));
360 static void add_window_display_history
P_ ((struct window
*, char *, int));
363 /* Add to the redisplay history how window W has been displayed.
364 MSG is a trace containing the information how W's glyph matrix
365 has been contructed. PAUSED_P non-zero means that the update
366 has been interrupted for pending input. */
369 add_window_display_history (w
, msg
, paused_p
)
376 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
378 buf
= redisplay_history
[history_idx
].trace
;
381 sprintf (buf
, "%d: window %p (`%s')%s\n",
384 ((BUFFERP (w
->buffer
)
385 && STRINGP (XBUFFER (w
->buffer
)->name
))
386 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
388 paused_p
? " ***paused***" : "");
393 /* Add to the redisplay history that frame F has been displayed.
394 PAUSED_P non-zero means that the update has been interrupted for
398 add_frame_display_history (f
, paused_p
)
404 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
406 buf
= redisplay_history
[history_idx
].trace
;
409 sprintf (buf
, "%d: update frame %p%s",
411 f
, paused_p
? " ***paused***" : "");
415 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
416 Sdump_redisplay_history
, 0, 0, "",
417 "Dump redisplay history to stderr.")
422 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
425 i
= REDISPLAY_HISTORY_SIZE
- 1;
426 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
433 #else /* GLYPH_DEBUG == 0 */
435 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + XFASTINT ((W)->top))
436 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + XFASTINT ((W)->left))
438 #endif /* GLYPH_DEBUG == 0 */
441 /* Like bcopy except never gets confused by overlap. Let this be the
442 first function defined in this file, or change emacs.c where the
443 address of this function is used. */
446 safe_bcopy (from
, to
, size
)
450 if (size
<= 0 || from
== to
)
453 /* If the source and destination don't overlap, then bcopy can
454 handle it. If they do overlap, but the destination is lower in
455 memory than the source, we'll assume bcopy can handle that. */
456 if (to
< from
|| from
+ size
<= to
)
457 bcopy (from
, to
, size
);
459 /* Otherwise, we'll copy from the end. */
462 register char *endf
= from
+ size
;
463 register char *endt
= to
+ size
;
465 /* If TO - FROM is large, then we should break the copy into
466 nonoverlapping chunks of TO - FROM bytes each. However, if
467 TO - FROM is small, then the bcopy function call overhead
468 makes this not worth it. The crossover point could be about
469 anywhere. Since I don't think the obvious copy loop is too
470 bad, I'm trying to err in its favor. */
475 while (endf
!= from
);
487 bcopy (endf
, endt
, to
- from
);
490 /* If SIZE wasn't a multiple of TO - FROM, there will be a
491 little left over. The amount left over is (endt + (to -
492 from)) - to, which is endt - from. */
493 bcopy (from
, to
, endt
- from
);
500 /***********************************************************************
502 ***********************************************************************/
504 /* Allocate and return a glyph_matrix structure. POOL is the glyph
505 pool from which memory for the matrix should be allocated, or null
506 for window-based redisplay where no glyph pools are used. The
507 member `pool' of the glyph matrix structure returned is set to
508 POOL, the structure is otherwise zeroed. */
510 struct glyph_matrix
*
511 new_glyph_matrix (pool
)
512 struct glyph_pool
*pool
;
514 struct glyph_matrix
*result
;
516 /* Allocate and clear. */
517 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
518 bzero (result
, sizeof *result
);
520 /* Increment number of allocated matrices. This count is used
521 to detect memory leaks. */
522 ++glyph_matrix_count
;
524 /* Set pool and return. */
530 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
532 The global counter glyph_matrix_count is decremented when a matrix
533 is freed. If the count gets negative, more structures were freed
534 than allocated, i.e. one matrix was freed more than once or a bogus
535 pointer was passed to this function.
537 If MATRIX->pool is null, this means that the matrix manages its own
538 glyph memory---this is done for matrices on X frames. Freeing the
539 matrix also frees the glyph memory in this case. */
542 free_glyph_matrix (matrix
)
543 struct glyph_matrix
*matrix
;
549 /* Detect the case that more matrices are freed than were
551 if (--glyph_matrix_count
< 0)
554 /* Free glyph memory if MATRIX owns it. */
555 if (matrix
->pool
== NULL
)
556 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
557 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
559 /* Free row structures and the matrix itself. */
560 xfree (matrix
->rows
);
566 /* Return the number of glyphs to reserve for a marginal area of
567 window W. TOTAL_GLYPHS is the number of glyphs in a complete
568 display line of window W. MARGIN gives the width of the marginal
569 area in canonical character units. MARGIN should be an integer
573 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
580 if (NUMBERP (margin
))
582 int width
= XFASTINT (w
->width
);
583 double d
= max (0, XFLOATINT (margin
));
584 d
= min (width
/ 2 - 1, d
);
585 n
= (int) ((double) total_glyphs
/ width
* d
);
594 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
597 W is null if the function is called for a frame glyph matrix.
598 Otherwise it is the window MATRIX is a member of. X and Y are the
599 indices of the first column and row of MATRIX within the frame
600 matrix, if such a matrix exists. They are zero for purely
601 window-based redisplay. DIM is the needed size of the matrix.
603 In window-based redisplay, where no frame matrices exist, glyph
604 matrices manage their own glyph storage. Otherwise, they allocate
605 storage from a common frame glyph pool which can be found in
608 The reason for this memory management strategy is to avoid complete
609 frame redraws if possible. When we allocate from a common pool, a
610 change of the location or size of a sub-matrix within the pool
611 requires a complete redisplay of the frame because we cannot easily
612 make sure that the current matrices of all windows still agree with
613 what is displayed on the screen. While this is usually fast, it
614 leads to screen flickering. */
617 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
619 struct glyph_matrix
*matrix
;
625 int marginal_areas_changed_p
= 0;
626 int header_line_changed_p
= 0;
627 int header_line_p
= 0;
628 int left
= -1, right
= -1;
629 int window_x
, window_y
, window_width
= -1, window_height
;
631 /* See if W had a top line that has disappeared now, or vice versa. */
634 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
635 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
637 matrix
->header_line_p
= header_line_p
;
639 /* Do nothing if MATRIX' size, position, vscroll, and marginal areas
640 haven't changed. This optimization is important because preserving
641 the matrix means preventing redisplay. */
642 if (matrix
->pool
== NULL
)
644 window_box (w
, -1, &window_x
, &window_y
, &window_width
, &window_height
);
645 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_width
);
646 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_width
);
647 xassert (left
>= 0 && right
>= 0);
648 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
649 || right
!= matrix
->right_margin_glyphs
);
651 if (!marginal_areas_changed_p
653 && !header_line_changed_p
654 && matrix
->window_left_x
== XFASTINT (w
->left
)
655 && matrix
->window_top_y
== XFASTINT (w
->top
)
656 && matrix
->window_height
== window_height
657 && matrix
->window_vscroll
== w
->vscroll
658 && matrix
->window_width
== window_width
)
662 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
663 if (matrix
->rows_allocated
< dim
.height
)
665 int size
= dim
.height
* sizeof (struct glyph_row
);
666 new_rows
= dim
.height
- matrix
->rows_allocated
;
667 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
668 bzero (matrix
->rows
+ matrix
->rows_allocated
,
669 new_rows
* sizeof *matrix
->rows
);
670 matrix
->rows_allocated
= dim
.height
;
675 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
676 on a frame not using window-based redisplay. Set up pointers for
677 each row into the glyph pool. */
680 xassert (matrix
->pool
->glyphs
);
684 left
= margin_glyphs_to_reserve (w
, dim
.width
,
685 w
->left_margin_width
);
686 right
= margin_glyphs_to_reserve (w
, dim
.width
,
687 w
->right_margin_width
);
692 for (i
= 0; i
< dim
.height
; ++i
)
694 struct glyph_row
*row
= &matrix
->rows
[i
];
696 row
->glyphs
[LEFT_MARGIN_AREA
]
697 = (matrix
->pool
->glyphs
698 + (y
+ i
) * matrix
->pool
->ncolumns
702 || row
== matrix
->rows
+ dim
.height
- 1
703 || (row
== matrix
->rows
&& matrix
->header_line_p
))
705 row
->glyphs
[TEXT_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
];
707 row
->glyphs
[RIGHT_MARGIN_AREA
]
708 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
709 row
->glyphs
[LAST_AREA
]
710 = row
->glyphs
[RIGHT_MARGIN_AREA
];
714 row
->glyphs
[TEXT_AREA
]
715 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
716 row
->glyphs
[RIGHT_MARGIN_AREA
]
717 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
718 row
->glyphs
[LAST_AREA
]
719 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
723 matrix
->left_margin_glyphs
= left
;
724 matrix
->right_margin_glyphs
= right
;
728 /* If MATRIX->pool is null, MATRIX is responsible for managing
729 its own memory. Allocate glyph memory from the heap. */
730 if (dim
.width
> matrix
->matrix_w
732 || header_line_changed_p
733 || marginal_areas_changed_p
)
735 struct glyph_row
*row
= matrix
->rows
;
736 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
740 row
->glyphs
[LEFT_MARGIN_AREA
]
741 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
743 * sizeof (struct glyph
)));
745 /* The mode line never has marginal areas. */
746 if (row
== matrix
->rows
+ dim
.height
- 1
747 || (row
== matrix
->rows
&& matrix
->header_line_p
))
749 row
->glyphs
[TEXT_AREA
]
750 = row
->glyphs
[LEFT_MARGIN_AREA
];
751 row
->glyphs
[RIGHT_MARGIN_AREA
]
752 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
753 row
->glyphs
[LAST_AREA
]
754 = row
->glyphs
[RIGHT_MARGIN_AREA
];
758 row
->glyphs
[TEXT_AREA
]
759 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
760 row
->glyphs
[RIGHT_MARGIN_AREA
]
761 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
762 row
->glyphs
[LAST_AREA
]
763 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
769 xassert (left
>= 0 && right
>= 0);
770 matrix
->left_margin_glyphs
= left
;
771 matrix
->right_margin_glyphs
= right
;
774 /* Number of rows to be used by MATRIX. */
775 matrix
->nrows
= dim
.height
;
776 xassert (matrix
->nrows
>= 0);
780 if (matrix
== w
->current_matrix
)
782 /* Mark rows in a current matrix of a window as not having
783 valid contents. It's important to not do this for
784 desired matrices. When Emacs starts, it may already be
785 building desired matrices when this function runs. */
786 if (window_width
< 0)
787 window_width
= window_box_width (w
, -1);
789 /* Optimize the case that only the height has changed (C-x 2,
790 upper window). Invalidate all rows that are no longer part
792 if (!marginal_areas_changed_p
793 && !header_line_changed_p
795 && dim
.width
== matrix
->matrix_w
796 && matrix
->window_left_x
== XFASTINT (w
->left
)
797 && matrix
->window_top_y
== XFASTINT (w
->top
)
798 && matrix
->window_width
== window_width
)
801 while (matrix
->rows
[i
].enabled_p
802 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
803 < matrix
->window_height
))
806 /* Window end is invalid, if inside of the rows that
808 if (INTEGERP (w
->window_end_vpos
)
809 && XFASTINT (w
->window_end_vpos
) >= i
)
810 w
->window_end_valid
= Qnil
;
812 while (i
< matrix
->nrows
)
813 matrix
->rows
[i
++].enabled_p
= 0;
817 for (i
= 0; i
< matrix
->nrows
; ++i
)
818 matrix
->rows
[i
].enabled_p
= 0;
821 else if (matrix
== w
->desired_matrix
)
823 /* Rows in desired matrices always have to be cleared;
824 redisplay expects this is the case when it runs, so it
825 had better be the case when we adjust matrices between
827 for (i
= 0; i
< matrix
->nrows
; ++i
)
828 matrix
->rows
[i
].enabled_p
= 0;
833 /* Remember last values to be able to optimize frame redraws. */
834 matrix
->matrix_x
= x
;
835 matrix
->matrix_y
= y
;
836 matrix
->matrix_w
= dim
.width
;
837 matrix
->matrix_h
= dim
.height
;
839 /* Record the top y location and height of W at the time the matrix
840 was last adjusted. This is used to optimize redisplay above. */
843 matrix
->window_left_x
= XFASTINT (w
->left
);
844 matrix
->window_top_y
= XFASTINT (w
->top
);
845 matrix
->window_height
= window_height
;
846 matrix
->window_width
= window_width
;
847 matrix
->window_vscroll
= w
->vscroll
;
852 /* Reverse the contents of rows in MATRIX between START and END. The
853 contents of the row at END - 1 end up at START, END - 2 at START +
854 1 etc. This is part of the implementation of rotate_matrix (see
858 reverse_rows (matrix
, start
, end
)
859 struct glyph_matrix
*matrix
;
864 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
866 /* Non-ISO HP/UX compiler doesn't like auto struct
868 struct glyph_row temp
;
869 temp
= matrix
->rows
[i
];
870 matrix
->rows
[i
] = matrix
->rows
[j
];
871 matrix
->rows
[j
] = temp
;
876 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
877 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
878 indices. (Note: this does not copy glyphs, only glyph pointers in
879 row structures are moved around).
881 The algorithm used for rotating the vector was, I believe, first
882 described by Kernighan. See the vector R as consisting of two
883 sub-vectors AB, where A has length BY for BY >= 0. The result
884 after rotating is then BA. Reverse both sub-vectors to get ArBr
885 and reverse the result to get (ArBr)r which is BA. Similar for
889 rotate_matrix (matrix
, first
, last
, by
)
890 struct glyph_matrix
*matrix
;
895 /* Up (rotate left, i.e. towards lower indices). */
897 reverse_rows (matrix
, first
, first
+ by
);
898 reverse_rows (matrix
, first
+ by
, last
);
899 reverse_rows (matrix
, first
, last
);
903 /* Down (rotate right, i.e. towards higher indices). */
904 reverse_rows (matrix
, last
- by
, last
);
905 reverse_rows (matrix
, first
, last
- by
);
906 reverse_rows (matrix
, first
, last
);
911 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
912 with indices START <= index < END. Increment positions by DELTA/
916 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
917 struct glyph_matrix
*matrix
;
918 int start
, end
, delta
, delta_bytes
;
920 /* Check that START and END are reasonable values. */
921 xassert (start
>= 0 && start
<= matrix
->nrows
);
922 xassert (end
>= 0 && end
<= matrix
->nrows
);
923 xassert (start
<= end
);
925 for (; start
< end
; ++start
)
926 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
930 /* Enable a range of rows in glyph matrix MATRIX. START and END are
931 the row indices of the first and last + 1 row to enable. If
932 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
935 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
936 struct glyph_matrix
*matrix
;
940 xassert (start
<= end
);
941 xassert (start
>= 0 && start
< matrix
->nrows
);
942 xassert (end
>= 0 && end
<= matrix
->nrows
);
944 for (; start
< end
; ++start
)
945 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
951 This empties all rows in MATRIX by setting the enabled_p flag for
952 all rows of the matrix to zero. The function prepare_desired_row
953 will eventually really clear a row when it sees one with a zero
956 Resets update hints to defaults value. The only update hint
957 currently present is the flag MATRIX->no_scrolling_p. */
960 clear_glyph_matrix (matrix
)
961 struct glyph_matrix
*matrix
;
965 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
966 matrix
->no_scrolling_p
= 0;
971 /* Shift part of the glyph matrix MATRIX of window W up or down.
972 Increment y-positions in glyph rows between START and END by DY,
973 and recompute their visible height. */
976 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
978 struct glyph_matrix
*matrix
;
983 xassert (start
<= end
);
984 xassert (start
>= 0 && start
< matrix
->nrows
);
985 xassert (end
>= 0 && end
<= matrix
->nrows
);
987 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
988 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
990 for (; start
< end
; ++start
)
992 struct glyph_row
*row
= &matrix
->rows
[start
];
997 row
->visible_height
= row
->height
- (min_y
- row
->y
);
998 else if (row
->y
+ row
->height
> max_y
)
999 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1001 row
->visible_height
= row
->height
;
1006 /* Mark all rows in current matrices of frame F as invalid. Marking
1007 invalid is done by setting enabled_p to zero for all rows in a
1011 clear_current_matrices (f
)
1012 register struct frame
*f
;
1014 /* Clear frame current matrix, if we have one. */
1015 if (f
->current_matrix
)
1016 clear_glyph_matrix (f
->current_matrix
);
1018 /* Clear the matrix of the menu bar window, if such a window exists.
1019 The menu bar window is currently used to display menus on X when
1020 no toolkit support is compiled in. */
1021 if (WINDOWP (f
->menu_bar_window
))
1022 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1024 /* Clear the matrix of the tool-bar window, if any. */
1025 if (WINDOWP (f
->tool_bar_window
))
1026 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1028 /* Clear current window matrices. */
1029 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1030 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1034 /* Clear out all display lines of F for a coming redisplay. */
1037 clear_desired_matrices (f
)
1038 register struct frame
*f
;
1040 if (f
->desired_matrix
)
1041 clear_glyph_matrix (f
->desired_matrix
);
1043 if (WINDOWP (f
->menu_bar_window
))
1044 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1046 if (WINDOWP (f
->tool_bar_window
))
1047 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1049 /* Do it for window matrices. */
1050 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1051 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1055 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1056 non-zero clear desired matrices, otherwise clear current matrices. */
1059 clear_window_matrices (w
, desired_p
)
1065 if (!NILP (w
->hchild
))
1067 xassert (WINDOWP (w
->hchild
));
1068 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1070 else if (!NILP (w
->vchild
))
1072 xassert (WINDOWP (w
->vchild
));
1073 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1078 clear_glyph_matrix (w
->desired_matrix
);
1081 clear_glyph_matrix (w
->current_matrix
);
1082 w
->window_end_valid
= Qnil
;
1086 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1092 /***********************************************************************
1095 See dispextern.h for an overall explanation of glyph rows.
1096 ***********************************************************************/
1098 /* Clear glyph row ROW. Do it in a way that makes it robust against
1099 changes in the glyph_row structure, i.e. addition or removal of
1100 structure members. */
1102 static struct glyph_row null_row
;
1105 clear_glyph_row (row
)
1106 struct glyph_row
*row
;
1108 struct glyph
*p
[1 + LAST_AREA
];
1110 /* Save pointers. */
1111 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1112 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1113 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1114 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1119 /* Restore pointers. */
1120 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1121 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1122 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1123 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1125 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1126 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1127 Redisplay outputs such glyphs, and flickering effects were
1128 the result. This also depended on the contents of memory
1129 returned by xmalloc. If flickering happens again, activate
1130 the code below If the flickering is gone with that, chances
1131 are that the flickering has the same reason as here. */
1132 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1137 /* Make ROW an empty, enabled row of canonical character height,
1138 in window W starting at y-position Y. */
1141 blank_row (w
, row
, y
)
1143 struct glyph_row
*row
;
1148 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1149 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1151 clear_glyph_row (row
);
1153 row
->ascent
= row
->phys_ascent
= 0;
1154 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1157 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1158 else if (row
->y
+ row
->height
> max_y
)
1159 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1161 row
->visible_height
= row
->height
;
1167 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1168 are the amounts by which to change positions. Note that the first
1169 glyph of the text area of a row can have a buffer position even if
1170 the used count of the text area is zero. Such rows display line
1174 increment_row_positions (row
, delta
, delta_bytes
)
1175 struct glyph_row
*row
;
1176 int delta
, delta_bytes
;
1180 /* Increment start and end positions. */
1181 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1182 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1183 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1184 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1186 /* Increment positions in glyphs. */
1187 for (area
= 0; area
< LAST_AREA
; ++area
)
1188 for (i
= 0; i
< row
->used
[area
]; ++i
)
1189 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1190 && row
->glyphs
[area
][i
].charpos
> 0)
1191 row
->glyphs
[area
][i
].charpos
+= delta
;
1193 /* Capture the case of rows displaying a line end. */
1194 if (row
->used
[TEXT_AREA
] == 0
1195 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1196 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1201 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1202 contents, i.e. glyph structure contents are exchanged between A and
1203 B without changing glyph pointers in A and B. */
1206 swap_glyphs_in_rows (a
, b
)
1207 struct glyph_row
*a
, *b
;
1211 for (area
= 0; area
< LAST_AREA
; ++area
)
1213 /* Number of glyphs to swap. */
1214 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1216 /* Start of glyphs in area of row A. */
1217 struct glyph
*glyph_a
= a
->glyphs
[area
];
1219 /* End + 1 of glyphs in area of row A. */
1220 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1222 /* Start of glyphs in area of row B. */
1223 struct glyph
*glyph_b
= b
->glyphs
[area
];
1225 while (glyph_a
< glyph_a_end
)
1227 /* Non-ISO HP/UX compiler doesn't like auto struct
1231 *glyph_a
= *glyph_b
;
1241 /* Exchange pointers to glyph memory between glyph rows A and B. */
1244 swap_glyph_pointers (a
, b
)
1245 struct glyph_row
*a
, *b
;
1248 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1250 struct glyph
*temp
= a
->glyphs
[i
];
1251 a
->glyphs
[i
] = b
->glyphs
[i
];
1252 b
->glyphs
[i
] = temp
;
1257 /* Copy glyph row structure FROM to glyph row structure TO, except
1258 that glyph pointers in the structures are left unchanged. */
1261 copy_row_except_pointers (to
, from
)
1262 struct glyph_row
*to
, *from
;
1264 struct glyph
*pointers
[1 + LAST_AREA
];
1266 /* Save glyph pointers of TO. */
1267 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1269 /* Do a structure assignment. */
1272 /* Restore original pointers of TO. */
1273 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1277 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1278 TO and FROM are left unchanged. Glyph contents are copied from the
1279 glyph memory of FROM to the glyph memory of TO. Increment buffer
1280 positions in row TO by DELTA/ DELTA_BYTES. */
1283 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1284 struct glyph_row
*to
, *from
;
1285 int delta
, delta_bytes
;
1289 /* This is like a structure assignment TO = FROM, except that
1290 glyph pointers in the rows are left unchanged. */
1291 copy_row_except_pointers (to
, from
);
1293 /* Copy glyphs from FROM to TO. */
1294 for (area
= 0; area
< LAST_AREA
; ++area
)
1295 if (from
->used
[area
])
1296 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1297 from
->used
[area
] * sizeof (struct glyph
));
1299 /* Increment buffer positions in TO by DELTA. */
1300 increment_row_positions (to
, delta
, delta_bytes
);
1304 /* Assign glyph row FROM to glyph row TO. This works like a structure
1305 assignment TO = FROM, except that glyph pointers are not copied but
1306 exchanged between TO and FROM. Pointers must be exchanged to avoid
1310 assign_row (to
, from
)
1311 struct glyph_row
*to
, *from
;
1313 swap_glyph_pointers (to
, from
);
1314 copy_row_except_pointers (to
, from
);
1318 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1319 a row in a window matrix, is a slice of the glyph memory of the
1320 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1321 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1322 memory of FRAME_ROW. */
1327 glyph_row_slice_p (window_row
, frame_row
)
1328 struct glyph_row
*window_row
, *frame_row
;
1330 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1331 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1332 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1334 return (frame_glyph_start
<= window_glyph_start
1335 && window_glyph_start
< frame_glyph_end
);
1338 #endif /* GLYPH_DEBUG */
1342 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1343 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1344 in WINDOW_MATRIX is found satisfying the condition. */
1346 static struct glyph_row
*
1347 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1348 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1353 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1355 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1356 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1357 frame_matrix
->rows
+ row
))
1360 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1365 /* Prepare ROW for display. Desired rows are cleared lazily,
1366 i.e. they are only marked as to be cleared by setting their
1367 enabled_p flag to zero. When a row is to be displayed, a prior
1368 call to this function really clears it. */
1371 prepare_desired_row (row
)
1372 struct glyph_row
*row
;
1374 if (!row
->enabled_p
)
1376 clear_glyph_row (row
);
1382 /* Return a hash code for glyph row ROW. */
1385 line_hash_code (row
)
1386 struct glyph_row
*row
;
1394 /* Give all highlighted lines the same hash code
1395 so as to encourage scrolling to leave them in place. */
1400 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1401 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1405 int c
= glyph
->u
.ch
;
1406 int face_id
= glyph
->face_id
;
1407 if (must_write_spaces
)
1409 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1410 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1423 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1424 the number of characters in the line. If must_write_spaces is
1425 zero, leading and trailing spaces are ignored. */
1428 line_draw_cost (matrix
, vpos
)
1429 struct glyph_matrix
*matrix
;
1432 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1433 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1434 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1436 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1437 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1439 /* Ignore trailing and leading spaces if we can. */
1440 if (!must_write_spaces
)
1442 /* Skip from the end over trailing spaces. */
1443 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1446 /* All blank line. */
1450 /* Skip over leading spaces. */
1451 while (CHAR_GLYPH_SPACE_P (*beg
))
1455 /* If we don't have a glyph-table, each glyph is one character,
1456 so return the number of glyphs. */
1457 if (glyph_table_base
== 0)
1461 /* Otherwise, scan the glyphs and accumulate their total length
1466 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1469 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1472 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1482 /* Test two glyph rows A and B for equality. Value is non-zero if A
1483 and B have equal contents. W is the window to which the glyphs
1484 rows A and B belong. It is needed here to test for partial row
1485 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1486 flags of A and B, too. */
1489 row_equal_p (w
, a
, b
, mouse_face_p
)
1491 struct glyph_row
*a
, *b
;
1496 else if (a
->hash
!= b
->hash
)
1500 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1503 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1506 /* Compare glyphs. */
1507 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1509 if (a
->used
[area
] != b
->used
[area
])
1512 a_glyph
= a
->glyphs
[area
];
1513 a_end
= a_glyph
+ a
->used
[area
];
1514 b_glyph
= b
->glyphs
[area
];
1516 while (a_glyph
< a_end
1517 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1518 ++a_glyph
, ++b_glyph
;
1520 if (a_glyph
!= a_end
)
1524 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1525 || a
->inverse_p
!= b
->inverse_p
1526 || a
->fill_line_p
!= b
->fill_line_p
1527 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1528 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1529 || a
->continued_p
!= b
->continued_p
1530 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1531 || a
->overlapped_p
!= b
->overlapped_p
1532 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1533 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1534 /* Different partially visible characters on left margin. */
1536 /* Different height. */
1537 || a
->ascent
!= b
->ascent
1538 || a
->phys_ascent
!= b
->phys_ascent
1539 || a
->phys_height
!= b
->phys_height
1540 || a
->visible_height
!= b
->visible_height
)
1549 /***********************************************************************
1552 See dispextern.h for an overall explanation of glyph pools.
1553 ***********************************************************************/
1555 /* Allocate a glyph_pool structure. The structure returned is
1556 initialized with zeros. The global variable glyph_pool_count is
1557 incremented for each pool allocated. */
1559 static struct glyph_pool
*
1562 struct glyph_pool
*result
;
1564 /* Allocate a new glyph_pool and clear it. */
1565 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1566 bzero (result
, sizeof *result
);
1568 /* For memory leak and double deletion checking. */
1575 /* Free a glyph_pool structure POOL. The function may be called with
1576 a null POOL pointer. The global variable glyph_pool_count is
1577 decremented with every pool structure freed. If this count gets
1578 negative, more structures were freed than allocated, i.e. one
1579 structure must have been freed more than once or a bogus pointer
1580 was passed to free_glyph_pool. */
1583 free_glyph_pool (pool
)
1584 struct glyph_pool
*pool
;
1588 /* More freed than allocated? */
1590 xassert (glyph_pool_count
>= 0);
1592 xfree (pool
->glyphs
);
1598 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1599 columns we need. This function never shrinks a pool. The only
1600 case in which this would make sense, would be when a frame's size
1601 is changed from a large value to a smaller one. But, if someone
1602 does it once, we can expect that he will do it again.
1604 Value is non-zero if the pool changed in a way which makes
1605 re-adjusting window glyph matrices necessary. */
1608 realloc_glyph_pool (pool
, matrix_dim
)
1609 struct glyph_pool
*pool
;
1610 struct dim matrix_dim
;
1615 changed_p
= (pool
->glyphs
== 0
1616 || matrix_dim
.height
!= pool
->nrows
1617 || matrix_dim
.width
!= pool
->ncolumns
);
1619 /* Enlarge the glyph pool. */
1620 needed
= matrix_dim
.width
* matrix_dim
.height
;
1621 if (needed
> pool
->nglyphs
)
1623 int size
= needed
* sizeof (struct glyph
);
1626 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1629 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1630 bzero (pool
->glyphs
, size
);
1633 pool
->nglyphs
= needed
;
1636 /* Remember the number of rows and columns because (a) we use then
1637 to do sanity checks, and (b) the number of columns determines
1638 where rows in the frame matrix start---this must be available to
1639 determine pointers to rows of window sub-matrices. */
1640 pool
->nrows
= matrix_dim
.height
;
1641 pool
->ncolumns
= matrix_dim
.width
;
1648 /***********************************************************************
1650 ***********************************************************************/
1655 /* Flush standard output. This is sometimes useful to call from
1665 /* Check that no glyph pointers have been lost in MATRIX. If a
1666 pointer has been lost, e.g. by using a structure assignment between
1667 rows, at least one pointer must occur more than once in the rows of
1671 check_matrix_pointer_lossage (matrix
)
1672 struct glyph_matrix
*matrix
;
1676 for (i
= 0; i
< matrix
->nrows
; ++i
)
1677 for (j
= 0; j
< matrix
->nrows
; ++j
)
1679 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1680 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1684 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1687 matrix_row (matrix
, row
)
1688 struct glyph_matrix
*matrix
;
1691 xassert (matrix
&& matrix
->rows
);
1692 xassert (row
>= 0 && row
< matrix
->nrows
);
1694 /* That's really too slow for normal testing because this function
1695 is called almost everywhere. Although---it's still astonishingly
1696 fast, so it is valuable to have for debugging purposes. */
1698 check_matrix_pointer_lossage (matrix
);
1701 return matrix
->rows
+ row
;
1705 #if 0 /* This function makes invalid assumptions when text is
1706 partially invisible. But it might come handy for debugging
1709 /* Check invariants that must hold for an up to date current matrix of
1713 check_matrix_invariants (w
)
1716 struct glyph_matrix
*matrix
= w
->current_matrix
;
1717 int yb
= window_text_bottom_y (w
);
1718 struct glyph_row
*row
= matrix
->rows
;
1719 struct glyph_row
*last_text_row
= NULL
;
1720 struct buffer
*saved
= current_buffer
;
1721 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1724 /* This can sometimes happen for a fresh window. */
1725 if (matrix
->nrows
< 2)
1728 set_buffer_temp (buffer
);
1730 /* Note: last row is always reserved for the mode line. */
1731 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1732 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1734 struct glyph_row
*next
= row
+ 1;
1736 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1737 last_text_row
= row
;
1739 /* Check that character and byte positions are in sync. */
1740 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1741 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1743 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1744 have such a position temporarily in case of a minibuffer
1745 displaying something like `[Sole completion]' at its end. */
1746 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1747 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1748 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1750 /* Check that end position of `row' is equal to start position
1752 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1754 xassert (MATRIX_ROW_END_CHARPOS (row
)
1755 == MATRIX_ROW_START_CHARPOS (next
));
1756 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1757 == MATRIX_ROW_START_BYTEPOS (next
));
1762 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1763 xassert (w
->desired_matrix
->rows
!= NULL
);
1764 set_buffer_temp (saved
);
1769 #endif /* GLYPH_DEBUG != 0 */
1773 /**********************************************************************
1774 Allocating/ Adjusting Glyph Matrices
1775 **********************************************************************/
1777 /* Allocate glyph matrices over a window tree for a frame-based
1780 X and Y are column/row within the frame glyph matrix where
1781 sub-matrices for the window tree rooted at WINDOW must be
1782 allocated. CH_DIM contains the dimensions of the smallest
1783 character that could be used during display. DIM_ONLY_P non-zero
1784 means that the caller of this function is only interested in the
1785 result matrix dimension, and matrix adjustments should not be
1788 The function returns the total width/height of the sub-matrices of
1789 the window tree. If called on a frame root window, the computation
1790 will take the mini-buffer window into account.
1792 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1794 NEW_LEAF_MATRIX set if any window in the tree did not have a
1795 glyph matrices yet, and
1797 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1798 any window in the tree will be changed or have been changed (see
1801 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1804 Windows are arranged into chains of windows on the same level
1805 through the next fields of window structures. Such a level can be
1806 either a sequence of horizontally adjacent windows from left to
1807 right, or a sequence of vertically adjacent windows from top to
1808 bottom. Each window in a horizontal sequence can be either a leaf
1809 window or a vertical sequence; a window in a vertical sequence can
1810 be either a leaf or a horizontal sequence. All windows in a
1811 horizontal sequence have the same height, and all windows in a
1812 vertical sequence have the same width.
1814 This function uses, for historical reasons, a more general
1815 algorithm to determine glyph matrix dimensions that would be
1818 The matrix height of a horizontal sequence is determined by the
1819 maximum height of any matrix in the sequence. The matrix width of
1820 a horizontal sequence is computed by adding up matrix widths of
1821 windows in the sequence.
1823 |<------- result width ------->|
1824 +---------+----------+---------+ ---
1827 +---------+ | | result height
1832 The matrix width of a vertical sequence is the maximum matrix width
1833 of any window in the sequence. Its height is computed by adding up
1834 matrix heights of windows in the sequence.
1836 |<---- result width -->|
1844 +------------+---------+ |
1847 +------------+---------+ --- */
1849 /* Bit indicating that a new matrix will be allocated or has been
1852 #define NEW_LEAF_MATRIX (1 << 0)
1854 /* Bit indicating that a matrix will or has changed its location or
1857 #define CHANGED_LEAF_MATRIX (1 << 1)
1860 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1861 dim_only_p
, window_change_flags
)
1866 int *window_change_flags
;
1868 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1870 int wmax
= 0, hmax
= 0;
1874 int in_horz_combination_p
;
1876 /* What combination is WINDOW part of? Compute this once since the
1877 result is the same for all windows in the `next' chain. The
1878 special case of a root window (parent equal to nil) is treated
1879 like a vertical combination because a root window's `next'
1880 points to the mini-buffer window, if any, which is arranged
1881 vertically below other windows. */
1882 in_horz_combination_p
1883 = (!NILP (XWINDOW (window
)->parent
)
1884 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1886 /* For WINDOW and all windows on the same level. */
1889 w
= XWINDOW (window
);
1891 /* Get the dimension of the window sub-matrix for W, depending
1892 on whether this a combination or a leaf window. */
1893 if (!NILP (w
->hchild
))
1894 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1896 window_change_flags
);
1897 else if (!NILP (w
->vchild
))
1898 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1900 window_change_flags
);
1903 /* If not already done, allocate sub-matrix structures. */
1904 if (w
->desired_matrix
== NULL
)
1906 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1907 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1908 *window_change_flags
|= NEW_LEAF_MATRIX
;
1911 /* Width and height MUST be chosen so that there are no
1912 holes in the frame matrix. */
1913 dim
.width
= XINT (w
->width
);
1914 dim
.height
= XINT (w
->height
);
1916 /* Will matrix be re-allocated? */
1917 if (x
!= w
->desired_matrix
->matrix_x
1918 || y
!= w
->desired_matrix
->matrix_y
1919 || dim
.width
!= w
->desired_matrix
->matrix_w
1920 || dim
.height
!= w
->desired_matrix
->matrix_h
1921 || (margin_glyphs_to_reserve (w
, dim
.width
,
1922 w
->right_margin_width
)
1923 != w
->desired_matrix
->left_margin_glyphs
)
1924 || (margin_glyphs_to_reserve (w
, dim
.width
,
1925 w
->left_margin_width
)
1926 != w
->desired_matrix
->right_margin_glyphs
))
1927 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1929 /* Actually change matrices, if allowed. Do not consider
1930 CHANGED_LEAF_MATRIX computed above here because the pool
1931 may have been changed which we don't now here. We trust
1932 that we only will be called with DIM_ONLY_P != 0 when
1936 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1937 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1941 /* If we are part of a horizontal combination, advance x for
1942 windows to the right of W; otherwise advance y for windows
1944 if (in_horz_combination_p
)
1949 /* Remember maximum glyph matrix dimensions. */
1950 wmax
= max (wmax
, dim
.width
);
1951 hmax
= max (hmax
, dim
.height
);
1953 /* Next window on same level. */
1956 while (!NILP (window
));
1958 /* Set `total' to the total glyph matrix dimension of this window
1959 level. In a vertical combination, the width is the width of the
1960 widest window; the height is the y we finally reached, corrected
1961 by the y we started with. In a horizontal combination, the total
1962 height is the height of the tallest window, and the width is the
1963 x we finally reached, corrected by the x we started with. */
1964 if (in_horz_combination_p
)
1966 total
.width
= x
- x0
;
1967 total
.height
= hmax
;
1972 total
.height
= y
- y0
;
1979 /* Allocate window matrices for window-based redisplay. W is the
1980 window whose matrices must be allocated/reallocated. CH_DIM is the
1981 size of the smallest character that could potentially be used on W. */
1984 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1988 struct frame
*f
= XFRAME (w
->frame
);
1992 if (!NILP (w
->vchild
))
1993 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1994 else if (!NILP (w
->hchild
))
1995 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1998 /* W is a leaf window. */
1999 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
2000 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
2003 /* If matrices are not yet allocated, allocate them now. */
2004 if (w
->desired_matrix
== NULL
)
2006 w
->desired_matrix
= new_glyph_matrix (NULL
);
2007 w
->current_matrix
= new_glyph_matrix (NULL
);
2010 /* Compute number of glyphs needed in a glyph row. */
2011 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
2013 /* 2 partially visible columns in the text area. */
2015 /* One partially visible column at the right
2016 edge of each marginal area. */
2019 /* Compute number of glyph rows needed. */
2020 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
2022 /* One partially visible line at the top and
2023 bottom of the window. */
2025 /* 2 for top and mode line. */
2028 /* Change matrices. */
2029 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2030 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2033 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2038 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2039 do it for all frames; otherwise do it just for the given frame.
2040 This function must be called when a new frame is created, its size
2041 changes, or its window configuration changes. */
2047 /* Block input so that expose events and other events that access
2048 glyph matrices are not processed while we are changing them. */
2052 adjust_frame_glyphs (f
);
2055 Lisp_Object tail
, lisp_frame
;
2057 FOR_EACH_FRAME (tail
, lisp_frame
)
2058 adjust_frame_glyphs (XFRAME (lisp_frame
));
2065 /* Adjust frame glyphs when Emacs is initialized.
2067 To be called from init_display.
2069 We need a glyph matrix because redraw will happen soon.
2070 Unfortunately, window sizes on selected_frame are not yet set to
2071 meaningful values. I believe we can assume that there are only two
2072 windows on the frame---the mini-buffer and the root window. Frame
2073 height and width seem to be correct so far. So, set the sizes of
2074 windows to estimated values. */
2077 adjust_frame_glyphs_initially ()
2079 struct frame
*sf
= SELECTED_FRAME ();
2080 struct window
*root
= XWINDOW (sf
->root_window
);
2081 struct window
*mini
= XWINDOW (root
->next
);
2082 int frame_height
= FRAME_HEIGHT (sf
);
2083 int frame_width
= FRAME_WIDTH (sf
);
2084 int top_margin
= FRAME_TOP_MARGIN (sf
);
2086 /* Do it for the root window. */
2087 XSETFASTINT (root
->top
, top_margin
);
2088 XSETFASTINT (root
->width
, frame_width
);
2089 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2091 /* Do it for the mini-buffer window. */
2092 XSETFASTINT (mini
->top
, frame_height
- 1);
2093 XSETFASTINT (mini
->width
, frame_width
);
2094 set_window_height (root
->next
, 1, 0);
2096 adjust_frame_glyphs (sf
);
2097 glyphs_initialized_initially_p
= 1;
2101 /* Allocate/reallocate glyph matrices of a single frame F. */
2104 adjust_frame_glyphs (f
)
2107 if (FRAME_WINDOW_P (f
))
2108 adjust_frame_glyphs_for_window_redisplay (f
);
2110 adjust_frame_glyphs_for_frame_redisplay (f
);
2112 /* Don't forget the message buffer and the buffer for
2113 decode_mode_spec. */
2114 adjust_frame_message_buffer (f
);
2115 adjust_decode_mode_spec_buffer (f
);
2117 f
->glyphs_initialized_p
= 1;
2121 /* In the window tree with root W, build current matrices of leaf
2122 windows from the frame's current matrix. */
2125 fake_current_matrices (window
)
2130 for (; !NILP (window
); window
= w
->next
)
2132 w
= XWINDOW (window
);
2134 if (!NILP (w
->hchild
))
2135 fake_current_matrices (w
->hchild
);
2136 else if (!NILP (w
->vchild
))
2137 fake_current_matrices (w
->vchild
);
2141 struct frame
*f
= XFRAME (w
->frame
);
2142 struct glyph_matrix
*m
= w
->current_matrix
;
2143 struct glyph_matrix
*fm
= f
->current_matrix
;
2145 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2146 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2148 for (i
= 0; i
< m
->matrix_h
; ++i
)
2150 struct glyph_row
*r
= m
->rows
+ i
;
2151 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2153 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2154 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2156 r
->enabled_p
= fr
->enabled_p
;
2159 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2160 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2161 r
->used
[TEXT_AREA
] = (m
->matrix_w
2162 - r
->used
[LEFT_MARGIN_AREA
]
2163 - r
->used
[RIGHT_MARGIN_AREA
]);
2165 r
->inverse_p
= fr
->inverse_p
;
2173 /* Save away the contents of frame F's current frame matrix. Value is
2174 a glyph matrix holding the contents of F's current frame matrix. '*/
2176 static struct glyph_matrix
*
2177 save_current_matrix (f
)
2181 struct glyph_matrix
*saved
;
2183 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2184 bzero (saved
, sizeof *saved
);
2185 saved
->nrows
= f
->current_matrix
->nrows
;
2186 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2187 * sizeof *saved
->rows
);
2188 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2190 for (i
= 0; i
< saved
->nrows
; ++i
)
2192 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2193 struct glyph_row
*to
= saved
->rows
+ i
;
2194 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2195 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2196 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2197 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2204 /* Restore the contents of frame F's current frame matrix from SAVED,
2205 and free memory associated with SAVED. */
2208 restore_current_matrix (f
, saved
)
2210 struct glyph_matrix
*saved
;
2214 for (i
= 0; i
< saved
->nrows
; ++i
)
2216 struct glyph_row
*from
= saved
->rows
+ i
;
2217 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2218 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2219 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2220 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2221 xfree (from
->glyphs
[TEXT_AREA
]);
2224 xfree (saved
->rows
);
2230 /* Allocate/reallocate glyph matrices of a single frame F for
2231 frame-based redisplay. */
2234 adjust_frame_glyphs_for_frame_redisplay (f
)
2238 struct dim matrix_dim
;
2240 int window_change_flags
;
2243 if (!FRAME_LIVE_P (f
))
2246 /* Determine the smallest character in any font for F. On
2247 console windows, all characters have dimension (1, 1). */
2248 ch_dim
.width
= ch_dim
.height
= 1;
2250 top_window_y
= FRAME_TOP_MARGIN (f
);
2252 /* Allocate glyph pool structures if not already done. */
2253 if (f
->desired_pool
== NULL
)
2255 f
->desired_pool
= new_glyph_pool ();
2256 f
->current_pool
= new_glyph_pool ();
2259 /* Allocate frames matrix structures if needed. */
2260 if (f
->desired_matrix
== NULL
)
2262 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2263 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2266 /* Compute window glyph matrices. (This takes the mini-buffer
2267 window into account). The result is the size of the frame glyph
2268 matrix needed. The variable window_change_flags is set to a bit
2269 mask indicating whether new matrices will be allocated or
2270 existing matrices change their size or location within the frame
2272 window_change_flags
= 0;
2274 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2277 &window_change_flags
);
2279 /* Add in menu bar lines, if any. */
2280 matrix_dim
.height
+= top_window_y
;
2282 /* Enlarge pools as necessary. */
2283 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2284 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2286 /* Set up glyph pointers within window matrices. Do this only if
2287 absolutely necessary since it requires a frame redraw. */
2288 if (pool_changed_p
|| window_change_flags
)
2290 /* Do it for window matrices. */
2291 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2292 0, top_window_y
, ch_dim
, 0,
2293 &window_change_flags
);
2295 /* Size of frame matrices must equal size of frame. Note
2296 that we are called for X frames with window widths NOT equal
2297 to the frame width (from CHANGE_FRAME_SIZE_1). */
2298 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2299 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2301 /* Pointers to glyph memory in glyph rows are exchanged during
2302 the update phase of redisplay, which means in general that a
2303 frame's current matrix consists of pointers into both the
2304 desired and current glyph pool of the frame. Adjusting a
2305 matrix sets the frame matrix up so that pointers are all into
2306 the same pool. If we want to preserve glyph contents of the
2307 current matrix over a call to adjust_glyph_matrix, we must
2308 make a copy of the current glyphs, and restore the current
2309 matrix' contents from that copy. */
2310 if (display_completed
2311 && !FRAME_GARBAGED_P (f
)
2312 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2313 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2315 struct glyph_matrix
*copy
= save_current_matrix (f
);
2316 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2317 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2318 restore_current_matrix (f
, copy
);
2319 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2323 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2324 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2325 SET_FRAME_GARBAGED (f
);
2331 /* Allocate/reallocate glyph matrices of a single frame F for
2332 window-based redisplay. */
2335 adjust_frame_glyphs_for_window_redisplay (f
)
2341 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2343 /* Get minimum sizes. */
2344 #ifdef HAVE_WINDOW_SYSTEM
2345 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2346 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2348 ch_dim
.width
= ch_dim
.height
= 1;
2351 /* Allocate/reallocate window matrices. */
2352 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2355 /* Allocate/ reallocate matrices of the dummy window used to display
2356 the menu bar under X when no X toolkit support is available. */
2357 #ifndef USE_X_TOOLKIT
2359 /* Allocate a dummy window if not already done. */
2360 if (NILP (f
->menu_bar_window
))
2362 f
->menu_bar_window
= make_window ();
2363 w
= XWINDOW (f
->menu_bar_window
);
2364 XSETFRAME (w
->frame
, f
);
2365 w
->pseudo_window_p
= 1;
2368 w
= XWINDOW (f
->menu_bar_window
);
2370 /* Set window dimensions to frame dimensions and allocate or
2371 adjust glyph matrices of W. */
2372 XSETFASTINT (w
->top
, 0);
2373 XSETFASTINT (w
->left
, 0);
2374 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2375 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2376 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2378 #endif /* not USE_X_TOOLKIT */
2380 /* Allocate/ reallocate matrices of the tool bar window. If we
2381 don't have a tool bar window yet, make one. */
2382 if (NILP (f
->tool_bar_window
))
2384 f
->tool_bar_window
= make_window ();
2385 w
= XWINDOW (f
->tool_bar_window
);
2386 XSETFRAME (w
->frame
, f
);
2387 w
->pseudo_window_p
= 1;
2390 w
= XWINDOW (f
->tool_bar_window
);
2392 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2393 XSETFASTINT (w
->left
, 0);
2394 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2395 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2396 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2400 /* Adjust/ allocate message buffer of frame F.
2402 Note that the message buffer is never freed. Since I could not
2403 find a free in 19.34, I assume that freeing it would be
2404 problematic in some way and don't do it either.
2406 (Implementation note: It should be checked if we can free it
2407 eventually without causing trouble). */
2410 adjust_frame_message_buffer (f
)
2413 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2415 if (FRAME_MESSAGE_BUF (f
))
2417 char *buffer
= FRAME_MESSAGE_BUF (f
);
2418 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2419 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2422 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2426 /* Re-allocate buffer for decode_mode_spec on frame F. */
2429 adjust_decode_mode_spec_buffer (f
)
2432 f
->decode_mode_spec_buffer
2433 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2434 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2439 /**********************************************************************
2440 Freeing Glyph Matrices
2441 **********************************************************************/
2443 /* Free glyph memory for a frame F. F may be null. This function can
2444 be called for the same frame more than once. The root window of
2445 F may be nil when this function is called. This is the case when
2446 the function is called when F is destroyed. */
2452 if (f
&& f
->glyphs_initialized_p
)
2454 /* Block interrupt input so that we don't get surprised by an X
2455 event while we're in an inconsistent state. */
2457 f
->glyphs_initialized_p
= 0;
2459 /* Release window sub-matrices. */
2460 if (!NILP (f
->root_window
))
2461 free_window_matrices (XWINDOW (f
->root_window
));
2463 /* Free the dummy window for menu bars without X toolkit and its
2465 if (!NILP (f
->menu_bar_window
))
2467 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2468 free_glyph_matrix (w
->desired_matrix
);
2469 free_glyph_matrix (w
->current_matrix
);
2470 w
->desired_matrix
= w
->current_matrix
= NULL
;
2471 f
->menu_bar_window
= Qnil
;
2474 /* Free the tool bar window and its glyph matrices. */
2475 if (!NILP (f
->tool_bar_window
))
2477 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2478 free_glyph_matrix (w
->desired_matrix
);
2479 free_glyph_matrix (w
->current_matrix
);
2480 w
->desired_matrix
= w
->current_matrix
= NULL
;
2481 f
->tool_bar_window
= Qnil
;
2484 /* Release frame glyph matrices. Reset fields to zero in
2485 case we are called a second time. */
2486 if (f
->desired_matrix
)
2488 free_glyph_matrix (f
->desired_matrix
);
2489 free_glyph_matrix (f
->current_matrix
);
2490 f
->desired_matrix
= f
->current_matrix
= NULL
;
2493 /* Release glyph pools. */
2494 if (f
->desired_pool
)
2496 free_glyph_pool (f
->desired_pool
);
2497 free_glyph_pool (f
->current_pool
);
2498 f
->desired_pool
= f
->current_pool
= NULL
;
2506 /* Free glyph sub-matrices in the window tree rooted at W. This
2507 function may be called with a null pointer, and it may be called on
2508 the same tree more than once. */
2511 free_window_matrices (w
)
2516 if (!NILP (w
->hchild
))
2517 free_window_matrices (XWINDOW (w
->hchild
));
2518 else if (!NILP (w
->vchild
))
2519 free_window_matrices (XWINDOW (w
->vchild
));
2522 /* This is a leaf window. Free its memory and reset fields
2523 to zero in case this function is called a second time for
2525 free_glyph_matrix (w
->current_matrix
);
2526 free_glyph_matrix (w
->desired_matrix
);
2527 w
->current_matrix
= w
->desired_matrix
= NULL
;
2530 /* Next window on same level. */
2531 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2536 /* Check glyph memory leaks. This function is called from
2537 shut_down_emacs. Note that frames are not destroyed when Emacs
2538 exits. We therefore free all glyph memory for all active frames
2539 explicitly and check that nothing is left allocated. */
2542 check_glyph_memory ()
2544 Lisp_Object tail
, frame
;
2546 /* Free glyph memory for all frames. */
2547 FOR_EACH_FRAME (tail
, frame
)
2548 free_glyphs (XFRAME (frame
));
2550 /* Check that nothing is left allocated. */
2551 if (glyph_matrix_count
)
2553 if (glyph_pool_count
)
2559 /**********************************************************************
2560 Building a Frame Matrix
2561 **********************************************************************/
2563 /* Most of the redisplay code works on glyph matrices attached to
2564 windows. This is a good solution most of the time, but it is not
2565 suitable for terminal code. Terminal output functions cannot rely
2566 on being able to set an arbitrary terminal window. Instead they
2567 must be provided with a view of the whole frame, i.e. the whole
2568 screen. We build such a view by constructing a frame matrix from
2569 window matrices in this section.
2571 Windows that must be updated have their must_be_update_p flag set.
2572 For all such windows, their desired matrix is made part of the
2573 desired frame matrix. For other windows, their current matrix is
2574 made part of the desired frame matrix.
2576 +-----------------+----------------+
2577 | desired | desired |
2579 +-----------------+----------------+
2582 +----------------------------------+
2584 Desired window matrices can be made part of the frame matrix in a
2585 cheap way: We exploit the fact that the desired frame matrix and
2586 desired window matrices share their glyph memory. This is not
2587 possible for current window matrices. Their glyphs are copied to
2588 the desired frame matrix. The latter is equivalent to
2589 preserve_other_columns in the old redisplay.
2591 Used glyphs counters for frame matrix rows are the result of adding
2592 up glyph lengths of the window matrices. A line in the frame
2593 matrix is enabled, if a corresponding line in a window matrix is
2596 After building the desired frame matrix, it will be passed to
2597 terminal code, which will manipulate both the desired and current
2598 frame matrix. Changes applied to the frame's current matrix have
2599 to be visible in current window matrices afterwards, of course.
2601 This problem is solved like this:
2603 1. Window and frame matrices share glyphs. Window matrices are
2604 constructed in a way that their glyph contents ARE the glyph
2605 contents needed in a frame matrix. Thus, any modification of
2606 glyphs done in terminal code will be reflected in window matrices
2609 2. Exchanges of rows in a frame matrix done by terminal code are
2610 intercepted by hook functions so that corresponding row operations
2611 on window matrices can be performed. This is necessary because we
2612 use pointers to glyphs in glyph row structures. To satisfy the
2613 assumption of point 1 above that glyphs are updated implicitly in
2614 window matrices when they are manipulated via the frame matrix,
2615 window and frame matrix must of course agree where to find the
2616 glyphs for their rows. Possible manipulations that must be
2617 mirrored are assignments of rows of the desired frame matrix to the
2618 current frame matrix and scrolling the current frame matrix. */
2620 /* Build frame F's desired matrix from window matrices. Only windows
2621 which have the flag must_be_updated_p set have to be updated. Menu
2622 bar lines of a frame are not covered by window matrices, so make
2623 sure not to touch them in this function. */
2626 build_frame_matrix (f
)
2631 /* F must have a frame matrix when this function is called. */
2632 xassert (!FRAME_WINDOW_P (f
));
2634 /* Clear all rows in the frame matrix covered by window matrices.
2635 Menu bar lines are not covered by windows. */
2636 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2637 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2639 /* Build the matrix by walking the window tree. */
2640 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2641 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2645 /* Walk a window tree, building a frame matrix MATRIX from window
2646 matrices. W is the root of a window tree. */
2649 build_frame_matrix_from_window_tree (matrix
, w
)
2650 struct glyph_matrix
*matrix
;
2655 if (!NILP (w
->hchild
))
2656 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2657 else if (!NILP (w
->vchild
))
2658 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2660 build_frame_matrix_from_leaf_window (matrix
, w
);
2662 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2667 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2668 desired frame matrix built. W is a leaf window whose desired or
2669 current matrix is to be added to FRAME_MATRIX. W's flag
2670 must_be_updated_p determines which matrix it contributes to
2671 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2672 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2673 Adding a desired matrix means setting up used counters and such in
2674 frame rows, while adding a current window matrix to FRAME_MATRIX
2675 means copying glyphs. The latter case corresponds to
2676 preserve_other_columns in the old redisplay. */
2679 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2680 struct glyph_matrix
*frame_matrix
;
2683 struct glyph_matrix
*window_matrix
;
2684 int window_y
, frame_y
;
2685 /* If non-zero, a glyph to insert at the right border of W. */
2686 GLYPH right_border_glyph
= 0;
2688 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2689 if (w
->must_be_updated_p
)
2691 window_matrix
= w
->desired_matrix
;
2693 /* Decide whether we want to add a vertical border glyph. */
2694 if (!WINDOW_RIGHTMOST_P (w
))
2696 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2697 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2698 ? XINT (DISP_BORDER_GLYPH (dp
))
2703 window_matrix
= w
->current_matrix
;
2705 /* For all rows in the window matrix and corresponding rows in the
2708 frame_y
= window_matrix
->matrix_y
;
2709 while (window_y
< window_matrix
->nrows
)
2711 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2712 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2713 int current_row_p
= window_matrix
== w
->current_matrix
;
2715 /* Fill up the frame row with spaces up to the left margin of the
2717 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2719 /* Fill up areas in the window matrix row with spaces. */
2720 fill_up_glyph_row_with_spaces (window_row
);
2722 /* If only part of W's desired matrix has been built, and
2723 window_row wasn't displayed, use the corresponding current
2725 if (window_matrix
== w
->desired_matrix
2726 && !window_row
->enabled_p
)
2728 window_row
= w
->current_matrix
->rows
+ window_y
;
2734 /* Copy window row to frame row. */
2735 bcopy (window_row
->glyphs
[0],
2736 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2737 window_matrix
->matrix_w
* sizeof (struct glyph
));
2741 xassert (window_row
->enabled_p
);
2743 /* Only when a desired row has been displayed, we want
2744 the corresponding frame row to be updated. */
2745 frame_row
->enabled_p
= 1;
2747 /* Maybe insert a vertical border between horizontally adjacent
2749 if (right_border_glyph
)
2751 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2752 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2755 /* Window row window_y must be a slice of frame row
2757 xassert (glyph_row_slice_p (window_row
, frame_row
));
2759 /* If rows are in sync, we don't have to copy glyphs because
2760 frame and window share glyphs. */
2763 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2764 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2768 /* Set number of used glyphs in the frame matrix. Since we fill
2769 up with spaces, and visit leaf windows from left to right it
2770 can be done simply. */
2771 frame_row
->used
[TEXT_AREA
]
2772 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2774 /* Or in other flags. */
2775 frame_row
->inverse_p
|= window_row
->inverse_p
;
2784 /* Add spaces to a glyph row ROW in a window matrix.
2786 Each row has the form:
2788 +---------+-----------------------------+------------+
2789 | left | text | right |
2790 +---------+-----------------------------+------------+
2792 Left and right marginal areas are optional. This function adds
2793 spaces to areas so that there are no empty holes between areas.
2794 In other words: If the right area is not empty, the text area
2795 is filled up with spaces up to the right area. If the text area
2796 is not empty, the left area is filled up.
2798 To be called for frame-based redisplay, only. */
2801 fill_up_glyph_row_with_spaces (row
)
2802 struct glyph_row
*row
;
2804 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2805 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2806 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2810 /* Fill area AREA of glyph row ROW with spaces. To be called for
2811 frame-based redisplay only. */
2814 fill_up_glyph_row_area_with_spaces (row
, area
)
2815 struct glyph_row
*row
;
2818 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2820 struct glyph
*end
= row
->glyphs
[area
+ 1];
2821 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2824 *text
++ = space_glyph
;
2825 row
->used
[area
] = text
- row
->glyphs
[area
];
2830 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2831 reached. In frame matrices only one area, TEXT_AREA, is used. */
2834 fill_up_frame_row_with_spaces (row
, upto
)
2835 struct glyph_row
*row
;
2838 int i
= row
->used
[TEXT_AREA
];
2839 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2842 glyph
[i
++] = space_glyph
;
2844 row
->used
[TEXT_AREA
] = i
;
2849 /**********************************************************************
2850 Mirroring operations on frame matrices in window matrices
2851 **********************************************************************/
2853 /* Set frame being updated via frame-based redisplay to F. This
2854 function must be called before updates to make explicit that we are
2855 working on frame matrices or not. */
2858 set_frame_matrix_frame (f
)
2861 frame_matrix_frame
= f
;
2865 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2866 DESIRED_MATRIX is the desired matrix corresponding to
2867 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2868 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2869 frame_matrix_frame is non-null, this indicates that the exchange is
2870 done in frame matrices, and that we have to perform analogous
2871 operations in window matrices of frame_matrix_frame. */
2874 make_current (desired_matrix
, current_matrix
, row
)
2875 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2878 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2879 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2880 int mouse_face_p
= current_row
->mouse_face_p
;
2882 /* Do current_row = desired_row. This exchanges glyph pointers
2883 between both rows, and does a structure assignment otherwise. */
2884 assign_row (current_row
, desired_row
);
2886 /* Enable current_row to mark it as valid. */
2887 current_row
->enabled_p
= 1;
2888 current_row
->mouse_face_p
= mouse_face_p
;
2890 /* If we are called on frame matrices, perform analogous operations
2891 for window matrices. */
2892 if (frame_matrix_frame
)
2893 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2897 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2898 W's frame which has been made current (by swapping pointers between
2899 current and desired matrix). Perform analogous operations in the
2900 matrices of leaf windows in the window tree rooted at W. */
2903 mirror_make_current (w
, frame_row
)
2909 if (!NILP (w
->hchild
))
2910 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2911 else if (!NILP (w
->vchild
))
2912 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2915 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2916 here because the checks performed in debug mode there
2917 will not allow the conversion. */
2918 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2920 /* If FRAME_ROW is within W, assign the desired row to the
2921 current row (exchanging glyph pointers). */
2922 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2924 struct glyph_row
*current_row
2925 = MATRIX_ROW (w
->current_matrix
, row
);
2926 struct glyph_row
*desired_row
2927 = MATRIX_ROW (w
->desired_matrix
, row
);
2929 if (desired_row
->enabled_p
)
2930 assign_row (current_row
, desired_row
);
2932 swap_glyph_pointers (desired_row
, current_row
);
2933 current_row
->enabled_p
= 1;
2937 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2942 /* Perform row dance after scrolling. We are working on the range of
2943 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2944 including) in MATRIX. COPY_FROM is a vector containing, for each
2945 row I in the range 0 <= I < NLINES, the index of the original line
2946 to move to I. This index is relative to the row range, i.e. 0 <=
2947 index < NLINES. RETAINED_P is a vector containing zero for each
2948 row 0 <= I < NLINES which is empty.
2950 This function is called from do_scrolling and do_direct_scrolling. */
2953 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2955 struct glyph_matrix
*matrix
;
2956 int unchanged_at_top
, nlines
;
2960 /* A copy of original rows. */
2961 struct glyph_row
*old_rows
;
2963 /* Rows to assign to. */
2964 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2968 /* Make a copy of the original rows. */
2969 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2970 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2972 /* Assign new rows, maybe clear lines. */
2973 for (i
= 0; i
< nlines
; ++i
)
2975 int enabled_before_p
= new_rows
[i
].enabled_p
;
2977 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2978 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2979 new_rows
[i
] = old_rows
[copy_from
[i
]];
2980 new_rows
[i
].enabled_p
= enabled_before_p
;
2982 /* RETAINED_P is zero for empty lines. */
2983 if (!retained_p
[copy_from
[i
]])
2984 new_rows
[i
].enabled_p
= 0;
2987 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2988 if (frame_matrix_frame
)
2989 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2990 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2994 /* Synchronize glyph pointers in the current matrix of window W with
2995 the current frame matrix. W must be full-width, and be on a tty
2999 sync_window_with_frame_matrix_rows (w
)
3002 struct frame
*f
= XFRAME (w
->frame
);
3003 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3005 /* Preconditions: W must be a leaf window and full-width. Its frame
3006 must have a frame matrix. */
3007 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3008 xassert (WINDOW_FULL_WIDTH_P (w
));
3009 xassert (!FRAME_WINDOW_P (f
));
3011 /* If W is a full-width window, glyph pointers in W's current matrix
3012 have, by definition, to be the same as glyph pointers in the
3013 corresponding frame matrix. */
3014 window_row
= w
->current_matrix
->rows
;
3015 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3016 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
3017 while (window_row
< window_row_end
)
3021 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
3022 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
3024 ++window_row
, ++frame_row
;
3029 /* Return the window in the window tree rooted in W containing frame
3030 row ROW. Value is null if none is found. */
3033 frame_row_to_window (w
, row
)
3037 struct window
*found
= NULL
;
3041 if (!NILP (w
->hchild
))
3042 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3043 else if (!NILP (w
->vchild
))
3044 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3045 else if (row
>= XFASTINT (w
->top
)
3046 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3049 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3056 /* Perform a line dance in the window tree rooted at W, after
3057 scrolling a frame matrix in mirrored_line_dance.
3059 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3060 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3061 COPY_FROM is a vector containing, for each row I in the range 0 <=
3062 I < NLINES, the index of the original line to move to I. This
3063 index is relative to the row range, i.e. 0 <= index < NLINES.
3064 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3068 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3070 int unchanged_at_top
, nlines
;
3076 if (!NILP (w
->hchild
))
3077 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3078 nlines
, copy_from
, retained_p
);
3079 else if (!NILP (w
->vchild
))
3080 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3081 nlines
, copy_from
, retained_p
);
3084 /* W is a leaf window, and we are working on its current
3086 struct glyph_matrix
*m
= w
->current_matrix
;
3088 struct glyph_row
*old_rows
;
3090 /* Make a copy of the original rows of matrix m. */
3091 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3092 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3094 for (i
= 0; i
< nlines
; ++i
)
3096 /* Frame relative line assigned to. */
3097 int frame_to
= i
+ unchanged_at_top
;
3099 /* Frame relative line assigned. */
3100 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3102 /* Window relative line assigned to. */
3103 int window_to
= frame_to
- m
->matrix_y
;
3105 /* Window relative line assigned. */
3106 int window_from
= frame_from
- m
->matrix_y
;
3108 /* Is assigned line inside window? */
3109 int from_inside_window_p
3110 = window_from
>= 0 && window_from
< m
->matrix_h
;
3112 /* Is assigned to line inside window? */
3113 int to_inside_window_p
3114 = window_to
>= 0 && window_to
< m
->matrix_h
;
3116 if (from_inside_window_p
&& to_inside_window_p
)
3118 /* Enabled setting before assignment. */
3119 int enabled_before_p
;
3121 /* Do the assignment. The enabled_p flag is saved
3122 over the assignment because the old redisplay did
3124 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3125 m
->rows
[window_to
] = old_rows
[window_from
];
3126 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3128 /* If frame line is empty, window line is empty, too. */
3129 if (!retained_p
[copy_from
[i
]])
3130 m
->rows
[window_to
].enabled_p
= 0;
3132 else if (to_inside_window_p
)
3134 /* A copy between windows. This is an infrequent
3135 case not worth optimizing. */
3136 struct frame
*f
= XFRAME (w
->frame
);
3137 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3139 struct glyph_matrix
*m2
;
3142 w2
= frame_row_to_window (root
, frame_to
);
3143 m2
= w2
->current_matrix
;
3144 m2_from
= frame_from
- m2
->matrix_y
;
3145 copy_row_except_pointers (m
->rows
+ window_to
,
3146 m2
->rows
+ m2_from
);
3148 /* If frame line is empty, window line is empty, too. */
3149 if (!retained_p
[copy_from
[i
]])
3150 m
->rows
[window_to
].enabled_p
= 0;
3153 else if (from_inside_window_p
)
3157 /* If there was a copy between windows, make sure glyph
3158 pointers are in sync with the frame matrix. */
3160 sync_window_with_frame_matrix_rows (w
);
3162 /* Check that no pointers are lost. */
3166 /* Next window on same level. */
3167 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3174 /* Check that window and frame matrices agree about their
3175 understanding where glyphs of the rows are to find. For each
3176 window in the window tree rooted at W, check that rows in the
3177 matrices of leaf window agree with their frame matrices about
3181 check_window_matrix_pointers (w
)
3186 if (!NILP (w
->hchild
))
3187 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3188 else if (!NILP (w
->vchild
))
3189 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3192 struct frame
*f
= XFRAME (w
->frame
);
3193 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3194 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3197 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3202 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3203 a window and FRAME_MATRIX is the corresponding frame matrix. For
3204 each row in WINDOW_MATRIX check that it's a slice of the
3205 corresponding frame row. If it isn't, abort. */
3208 check_matrix_pointers (window_matrix
, frame_matrix
)
3209 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3211 /* Row number in WINDOW_MATRIX. */
3214 /* Row number corresponding to I in FRAME_MATRIX. */
3215 int j
= window_matrix
->matrix_y
;
3217 /* For all rows check that the row in the window matrix is a
3218 slice of the row in the frame matrix. If it isn't we didn't
3219 mirror an operation on the frame matrix correctly. */
3220 while (i
< window_matrix
->nrows
)
3222 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3223 frame_matrix
->rows
+ j
))
3229 #endif /* GLYPH_DEBUG != 0 */
3233 /**********************************************************************
3234 VPOS and HPOS translations
3235 **********************************************************************/
3239 /* Translate vertical position VPOS which is relative to window W to a
3240 vertical position relative to W's frame. */
3243 window_to_frame_vpos (w
, vpos
)
3247 struct frame
*f
= XFRAME (w
->frame
);
3249 xassert (!FRAME_WINDOW_P (f
));
3250 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3251 vpos
+= XFASTINT (w
->top
);
3252 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3257 /* Translate horizontal position HPOS which is relative to window W to
3258 a vertical position relative to W's frame. */
3261 window_to_frame_hpos (w
, hpos
)
3265 struct frame
*f
= XFRAME (w
->frame
);
3267 xassert (!FRAME_WINDOW_P (f
));
3268 hpos
+= XFASTINT (w
->left
);
3272 #endif /* GLYPH_DEBUG */
3276 /**********************************************************************
3278 **********************************************************************/
3280 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3281 "Clear frame FRAME and output again what is supposed to appear on it.")
3287 CHECK_LIVE_FRAME (frame
, 0);
3290 /* Ignore redraw requests, if frame has no glyphs yet.
3291 (Implementation note: It still has to be checked why we are
3292 called so early here). */
3293 if (!glyphs_initialized_initially_p
)
3297 if (FRAME_MSDOS_P (f
))
3298 set_terminal_modes ();
3300 clear_current_matrices (f
);
3303 windows_or_buffers_changed
++;
3304 /* Mark all windows as inaccurate, so that every window will have
3305 its redisplay done. */
3306 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3307 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3313 /* Redraw frame F. This is nothing more than a call to the Lisp
3314 function redraw-frame. */
3321 XSETFRAME (frame
, f
);
3322 Fredraw_frame (frame
);
3326 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3327 "Clear and redisplay all visible frames.")
3330 Lisp_Object tail
, frame
;
3332 FOR_EACH_FRAME (tail
, frame
)
3333 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3334 Fredraw_frame (frame
);
3340 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3341 visible frames marked as garbaged. */
3344 redraw_garbaged_frames ()
3346 Lisp_Object tail
, frame
;
3348 FOR_EACH_FRAME (tail
, frame
)
3349 if (FRAME_VISIBLE_P (XFRAME (frame
))
3350 && FRAME_GARBAGED_P (XFRAME (frame
)))
3351 Fredraw_frame (frame
);
3356 /***********************************************************************
3358 ***********************************************************************/
3360 /* Try to update display and current glyph matrix directly.
3362 This function is called after a character G has been inserted into
3363 current_buffer. It tries to update the current glyph matrix and
3364 perform appropriate screen output to reflect the insertion. If it
3365 succeeds, the global flag redisplay_performed_directly_p will be
3366 set to 1, and thereby prevent the more costly general redisplay
3367 from running (see redisplay_internal).
3369 This function is not called for `hairy' character insertions.
3370 In particular, it is not called when after or before change
3371 functions exist, like they are used by font-lock. See keyboard.c
3372 for details where this function is called. */
3375 direct_output_for_insert (g
)
3378 register struct frame
*f
= SELECTED_FRAME ();
3379 struct window
*w
= XWINDOW (selected_window
);
3381 struct glyph_row
*glyph_row
;
3382 struct glyph
*glyphs
, *glyph
, *end
;
3384 /* Non-null means that Redisplay of W is based on window matrices. */
3385 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3386 /* Non-null means we are in overwrite mode. */
3387 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3389 struct text_pos pos
;
3390 int delta
, delta_bytes
;
3392 /* Not done directly. */
3393 redisplay_performed_directly_p
= 0;
3395 /* Quickly give up for some common cases. */
3396 if (cursor_in_echo_area
3397 /* Give up if fonts have changed. */
3399 /* Give up if face attributes have been changed. */
3400 || face_change_count
3401 /* Give up if cursor position not really known. */
3402 || !display_completed
3403 /* Give up if buffer appears in two places. */
3404 || buffer_shared
> 1
3405 /* Give up if currently displaying a message instead of the
3406 minibuffer contents. */
3407 || (EQ (selected_window
, minibuf_window
)
3408 && EQ (minibuf_window
, echo_area_window
))
3409 /* Give up for hscrolled mini-buffer because display of the prompt
3410 is handled specially there (see display_line). */
3411 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3412 /* Give up if overwriting in the middle of a line. */
3415 && FETCH_BYTE (PT
) != '\n')
3416 /* Give up for tabs and line ends. */
3420 /* Give up if unable to display the cursor in the window. */
3421 || w
->cursor
.vpos
< 0
3422 /* Give up if we are showing a message or just cleared the message
3423 because we might need to resize the echo area window. */
3424 || !NILP (echo_area_buffer
[0])
3425 || !NILP (echo_area_buffer
[1])
3426 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3427 /* Can't do it in a continued line because continuation
3428 lines would change. */
3429 (glyph_row
->continued_p
3430 /* Can't use this method if the line overlaps others or is
3431 overlapped by others because these other lines would
3432 have to be redisplayed. */
3433 || glyph_row
->overlapping_p
3434 || glyph_row
->overlapped_p
))
3435 /* Can't do it for partial width windows on terminal frames
3436 because we can't clear to eol in such a window. */
3437 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3440 /* If we can't insert glyphs, we can use this method only
3441 at the end of a line. */
3442 if (!char_ins_del_ok
)
3443 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3446 /* Set up a display iterator structure for W. Glyphs will be
3447 produced in scratch_glyph_row. Current position is W's cursor
3449 clear_glyph_row (&scratch_glyph_row
);
3450 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3451 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3452 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3455 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3456 if (glyph_row
->mouse_face_p
)
3459 /* Give up if highlighting trailing whitespace and we have trailing
3460 whitespace in glyph_row. We would have to remove the trailing
3461 whitespace face in that case. */
3462 if (!NILP (Vshow_trailing_whitespace
)
3463 && glyph_row
->used
[TEXT_AREA
])
3467 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3468 if (last
->type
== STRETCH_GLYPH
3469 || (last
->type
== CHAR_GLYPH
3470 && last
->u
.ch
== ' '))
3474 /* Give up if there are overlay strings at pos. This would fail
3475 if the overlay string has newlines in it. */
3476 if (STRINGP (it
.string
))
3479 it
.hpos
= w
->cursor
.hpos
;
3480 it
.vpos
= w
->cursor
.vpos
;
3481 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3482 it
.current_y
= w
->cursor
.y
;
3483 it
.end_charpos
= PT
;
3484 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3486 /* More than one display element may be returned for PT - 1 if
3487 (i) it's a control character which is translated into `\003' or
3488 `^C', or (ii) it has a display table entry, or (iii) it's a
3489 combination of both. */
3490 delta
= delta_bytes
= 0;
3491 while (get_next_display_element (&it
))
3493 PRODUCE_GLYPHS (&it
);
3495 /* Give up if glyph doesn't fit completely on the line. */
3496 if (it
.current_x
>= it
.last_visible_x
)
3499 /* Give up if new glyph has different ascent or descent than
3500 the original row, or if it is not a character glyph. */
3501 if (glyph_row
->ascent
!= it
.ascent
3502 || glyph_row
->height
!= it
.ascent
+ it
.descent
3503 || glyph_row
->phys_ascent
!= it
.phys_ascent
3504 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3505 || it
.what
!= IT_CHARACTER
)
3509 delta_bytes
+= it
.len
;
3510 set_iterator_to_next (&it
, 1);
3513 /* Give up if we hit the right edge of the window. We would have
3514 to insert truncation or continuation glyphs. */
3515 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3516 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3519 /* Give up if there is a \t following in the line. */
3521 it2
.end_charpos
= ZV
;
3522 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3523 while (get_next_display_element (&it2
)
3524 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3528 set_iterator_to_next (&it2
, 1);
3531 /* Number of new glyphs produced. */
3532 n
= it
.glyph_row
->used
[TEXT_AREA
];
3534 /* Start and end of glyphs in original row. */
3535 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3536 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3538 /* Make room for new glyphs, then insert them. */
3539 xassert (end
- glyphs
- n
>= 0);
3540 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3541 (end
- glyphs
- n
) * sizeof (*end
));
3542 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3543 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3544 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3546 /* Compute new line width. */
3547 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3548 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3549 glyph_row
->pixel_width
= glyph_row
->x
;
3552 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3556 /* Increment buffer positions for glyphs following the newly
3558 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3559 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3560 glyph
->charpos
+= delta
;
3562 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3564 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3565 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3568 /* Adjust positions in lines following the one we are in. */
3569 increment_matrix_positions (w
->current_matrix
,
3571 w
->current_matrix
->nrows
,
3572 delta
, delta_bytes
);
3574 glyph_row
->contains_overlapping_glyphs_p
3575 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3577 glyph_row
->displays_text_p
= 1;
3578 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3579 XFASTINT (w
->window_end_vpos
)));
3581 if (!NILP (Vshow_trailing_whitespace
))
3582 highlight_trailing_whitespace (it
.f
, glyph_row
);
3584 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3585 In the middle, we have to insert glyphs. Note that this is now
3586 implemented for X frames. The implementation uses updated_window
3588 updated_row
= glyph_row
;
3592 rif
->update_window_begin_hook (w
);
3594 if (glyphs
== end
- n
3595 /* In front of a space added by append_space. */
3596 || (glyphs
== end
- n
- 1
3597 && (end
- n
)->charpos
<= 0))
3598 rif
->write_glyphs (glyphs
, n
);
3600 rif
->insert_glyphs (glyphs
, n
);
3604 if (glyphs
== end
- n
)
3605 write_glyphs (glyphs
, n
);
3607 insert_glyphs (glyphs
, n
);
3610 w
->cursor
.hpos
+= n
;
3611 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3612 xassert (w
->cursor
.hpos
>= 0
3613 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3615 /* How to set the cursor differs depending on whether we are
3616 using a frame matrix or a window matrix. Note that when
3617 a frame matrix is used, cursor_to expects frame coordinates,
3618 and the X and Y parameters are not used. */
3619 if (window_redisplay_p
)
3620 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3621 w
->cursor
.y
, w
->cursor
.x
);
3625 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3626 + (INTEGERP (w
->left_margin_width
)
3627 ? XFASTINT (w
->left_margin_width
)
3629 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3634 rif
->update_window_end_hook (w
, 1, 0);
3639 TRACE ((stderr
, "direct output for insert\n"));
3641 UNCHANGED_MODIFIED
= MODIFF
;
3642 BEG_UNCHANGED
= GPT
- BEG
;
3643 XSETFASTINT (w
->last_point
, PT
);
3644 w
->last_cursor
= w
->cursor
;
3645 XSETFASTINT (w
->last_modified
, MODIFF
);
3646 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3648 redisplay_performed_directly_p
= 1;
3653 /* Perform a direct display update for moving PT by N positions
3654 left or right. N < 0 means a movement backwards. This function
3655 is currently only called for N == 1 or N == -1. */
3658 direct_output_forward_char (n
)
3661 struct frame
*f
= SELECTED_FRAME ();
3662 struct window
*w
= XWINDOW (selected_window
);
3663 struct glyph_row
*row
;
3665 /* Give up if point moved out of or into a composition. */
3666 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3667 current_buffer
, PT
))
3670 /* Give up if face attributes have been changed. */
3671 if (face_change_count
)
3674 /* Give up if current matrix is not up to date or we are
3675 displaying a message. */
3676 if (!display_completed
|| cursor_in_echo_area
)
3679 /* Give up if the buffer's direction is reversed. */
3680 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3683 /* Can't use direct output if highlighting a region. */
3684 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3687 /* Can't use direct output if highlighting trailing whitespace. */
3688 if (!NILP (Vshow_trailing_whitespace
))
3691 /* Give up if we are showing a message or just cleared the message
3692 because we might need to resize the echo area window. */
3693 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3696 /* Give up if currently displaying a message instead of the
3697 minibuffer contents. */
3698 if (XWINDOW (minibuf_window
) == w
3699 && EQ (minibuf_window
, echo_area_window
))
3702 /* Give up if we don't know where the cursor is. */
3703 if (w
->cursor
.vpos
< 0)
3706 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3708 /* Give up if PT is outside of the last known cursor row. */
3709 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3710 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3713 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3715 w
->last_cursor
= w
->cursor
;
3716 XSETFASTINT (w
->last_point
, PT
);
3718 xassert (w
->cursor
.hpos
>= 0
3719 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3721 if (FRAME_WINDOW_P (f
))
3722 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3723 w
->cursor
.y
, w
->cursor
.x
);
3727 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3728 + (INTEGERP (w
->left_margin_width
)
3729 ? XFASTINT (w
->left_margin_width
)
3731 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3736 redisplay_performed_directly_p
= 1;
3742 /***********************************************************************
3744 ***********************************************************************/
3746 /* Update frame F based on the data in desired matrices.
3748 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3749 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3752 Value is non-zero if redisplay was stopped due to pending input. */
3755 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3758 int inhibit_hairy_id_p
;
3760 /* 1 means display has been paused because of pending input. */
3762 struct window
*root_window
= XWINDOW (f
->root_window
);
3764 if (FRAME_WINDOW_P (f
))
3766 /* We are working on window matrix basis. All windows whose
3767 flag must_be_updated_p is set have to be updated. */
3769 /* Record that we are not working on frame matrices. */
3770 set_frame_matrix_frame (NULL
);
3772 /* Update all windows in the window tree of F, maybe stopping
3773 when pending input is detected. */
3776 /* Update the menu bar on X frames that don't have toolkit
3778 if (WINDOWP (f
->menu_bar_window
))
3779 update_window (XWINDOW (f
->menu_bar_window
), 1);
3781 /* Update the tool-bar window, if present. */
3782 if (WINDOWP (f
->tool_bar_window
))
3785 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3787 /* Update tool-bar window. */
3788 if (w
->must_be_updated_p
)
3790 update_window (w
, 1);
3791 w
->must_be_updated_p
= 0;
3793 /* Swap tool-bar strings. We swap because we want to
3795 tem
= f
->current_tool_bar_string
;
3796 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3797 f
->desired_tool_bar_string
= tem
;
3802 /* Update windows. */
3803 paused_p
= update_window_tree (root_window
, force_p
);
3806 #if 0 /* This flush is a performance bottleneck under X,
3807 and it doesn't seem to be necessary anyway. */
3808 rif
->flush_display (f
);
3813 /* We are working on frame matrix basis. Set the frame on whose
3814 frame matrix we operate. */
3815 set_frame_matrix_frame (f
);
3817 /* Build F's desired matrix from window matrices. */
3818 build_frame_matrix (f
);
3820 /* Update the display */
3822 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3826 fflush (termscript
);
3829 /* Check window matrices for lost pointers. */
3831 check_window_matrix_pointers (root_window
);
3832 add_frame_display_history (f
, paused_p
);
3836 /* Reset flags indicating that a window should be updated. */
3837 set_window_update_flags (root_window
, 0);
3839 display_completed
= !paused_p
;
3845 /************************************************************************
3846 Window-based updates
3847 ************************************************************************/
3849 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3850 don't stop updating when input is pending. */
3853 update_window_tree (w
, force_p
)
3859 while (w
&& !paused_p
)
3861 if (!NILP (w
->hchild
))
3862 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3863 else if (!NILP (w
->vchild
))
3864 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3865 else if (w
->must_be_updated_p
)
3866 paused_p
|= update_window (w
, force_p
);
3868 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3875 /* Update window W if its flag must_be_updated_p is non-zero. If
3876 FORCE_P is non-zero, don't stop updating if input is pending. */
3879 update_single_window (w
, force_p
)
3883 if (w
->must_be_updated_p
)
3885 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3887 /* Record that this is not a frame-based redisplay. */
3888 set_frame_matrix_frame (NULL
);
3892 update_window (w
, force_p
);
3895 /* Reset flag in W. */
3896 w
->must_be_updated_p
= 0;
3901 /* Redraw lines from the current matrix of window W that are
3902 overlapped by other rows. YB is bottom-most y-position in W. */
3905 redraw_overlapped_rows (w
, yb
)
3911 /* If rows overlapping others have been changed, the rows being
3912 overlapped have to be redrawn. This won't draw lines that have
3913 already been drawn in update_window_line because overlapped_p in
3914 desired rows is 0, so after row assignment overlapped_p in
3915 current rows is 0. */
3916 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3918 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3920 if (!row
->enabled_p
)
3922 else if (row
->mode_line_p
)
3925 if (row
->overlapped_p
)
3927 enum glyph_row_area area
;
3929 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3932 updated_area
= area
;
3933 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3934 if (row
->used
[area
])
3935 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3936 rif
->clear_end_of_line (-1);
3939 row
->overlapped_p
= 0;
3942 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3948 /* Redraw lines from the current matrix of window W that overlap
3949 others. YB is bottom-most y-position in W. */
3952 redraw_overlapping_rows (w
, yb
)
3957 struct glyph_row
*row
;
3959 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3961 row
= w
->current_matrix
->rows
+ i
;
3963 if (!row
->enabled_p
)
3965 else if (row
->mode_line_p
)
3968 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3970 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3972 if (row
->used
[LEFT_MARGIN_AREA
])
3973 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3975 if (row
->used
[TEXT_AREA
])
3976 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3978 if (row
->used
[RIGHT_MARGIN_AREA
])
3979 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3981 /* Record in neighbor rows that ROW overwrites part of their
3983 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3984 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3985 if ((row
->phys_height
- row
->phys_ascent
3986 > row
->height
- row
->ascent
)
3988 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3999 /* Check that no row in the current matrix of window W is enabled
4000 which is below what's displayed in the window. */
4003 check_current_matrix_flags (w
)
4006 int last_seen_p
= 0;
4007 int i
, yb
= window_text_bottom_y (w
);
4009 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4011 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4012 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4014 else if (last_seen_p
&& row
->enabled_p
)
4019 #endif /* GLYPH_DEBUG */
4022 /* Update display of window W. FORCE_P non-zero means that we should
4023 not stop when detecting pending input. */
4026 update_window (w
, force_p
)
4030 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4032 int preempt_count
= baud_rate
/ 2400 + 1;
4033 extern int input_pending
;
4034 extern Lisp_Object do_mouse_tracking
;
4036 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4037 extern struct frame
*updating_frame
;
4040 /* Check that W's frame doesn't have glyph matrices. */
4041 xassert (FRAME_WINDOW_P (f
));
4042 xassert (updating_frame
!= NULL
);
4044 /* Check pending input the first time so that we can quickly return. */
4045 if (redisplay_dont_pause
)
4048 detect_input_pending ();
4050 /* If forced to complete the update, or if no input is pending, do
4052 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4054 struct glyph_row
*row
, *end
;
4055 struct glyph_row
*mode_line_row
;
4056 struct glyph_row
*header_line_row
= NULL
;
4057 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4059 rif
->update_window_begin_hook (w
);
4060 yb
= window_text_bottom_y (w
);
4062 /* If window has a top line, update it before everything else.
4063 Adjust y-positions of other rows by the top line height. */
4064 row
= desired_matrix
->rows
;
4065 end
= row
+ desired_matrix
->nrows
- 1;
4066 if (row
->mode_line_p
)
4067 header_line_row
= row
++;
4069 /* Update the mode line, if necessary. */
4070 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4071 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4073 mode_line_row
->y
= yb
;
4074 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4076 &mouse_face_overwritten_p
);
4080 /* Find first enabled row. Optimizations in redisplay_internal
4081 may lead to an update with only one row enabled. There may
4082 be also completely empty matrices. */
4083 while (row
< end
&& !row
->enabled_p
)
4086 /* Try reusing part of the display by copying. */
4087 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4088 if (scrolling_window (w
, header_line_row
!= NULL
) > 0)
4089 force_p
= changed_p
= 1;
4091 /* Update the top mode line after scrolling because a new top
4092 line would otherwise overwrite lines at the top of the window
4093 that can be scrolled. */
4094 if (header_line_row
&& header_line_row
->enabled_p
)
4096 header_line_row
->y
= 0;
4097 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4101 /* Update the rest of the lines. */
4102 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4105 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4108 /* We'll Have to play a little bit with when to
4109 detect_input_pending. If it's done too often,
4110 scrolling large windows with repeated scroll-up
4111 commands will too quickly pause redisplay. */
4112 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4113 detect_input_pending ();
4115 changed_p
|= update_window_line (w
, vpos
,
4116 &mouse_face_overwritten_p
);
4118 /* Mark all rows below the last visible one in the current
4119 matrix as invalid. This is necessary because of
4120 variable line heights. Consider the case of three
4121 successive redisplays, where the first displays 5
4122 lines, the second 3 lines, and the third 5 lines again.
4123 If the second redisplay wouldn't mark rows in the
4124 current matrix invalid, the third redisplay might be
4125 tempted to optimize redisplay based on lines displayed
4126 in the first redisplay. */
4127 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4128 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4129 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4132 /* Was display preempted? */
4133 paused_p
= row
< end
;
4135 /* Fix the appearance of overlapping(overlapped rows. */
4136 if (!paused_p
&& !w
->pseudo_window_p
)
4138 if (changed_p
&& rif
->fix_overlapping_area
)
4140 redraw_overlapped_rows (w
, yb
);
4141 redraw_overlapping_rows (w
, yb
);
4144 /* Make cursor visible at cursor position of W. */
4145 set_window_cursor_after_update (w
);
4147 #if 0 /* Check that current matrix invariants are satisfied. This is
4148 for debugging only. See the comment of check_matrix_invariants. */
4149 IF_DEBUG (check_matrix_invariants (w
));
4154 /* Remember the redisplay method used to display the matrix. */
4155 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4158 /* End of update of window W. */
4159 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
4165 /* check_current_matrix_flags (w); */
4166 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4169 clear_glyph_matrix (desired_matrix
);
4175 /* Update the display of area AREA in window W, row number VPOS.
4176 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4179 update_marginal_area (w
, area
, vpos
)
4183 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4185 /* Let functions in xterm.c know what area subsequent X positions
4186 will be relative to. */
4187 updated_area
= area
;
4189 /* Set cursor to start of glyphs, write them, and clear to the end
4190 of the area. I don't think that something more sophisticated is
4191 necessary here, since marginal areas will not be the default. */
4192 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4193 if (desired_row
->used
[area
])
4194 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4195 rif
->clear_end_of_line (-1);
4199 /* Update the display of the text area of row VPOS in window W.
4200 Value is non-zero if display has changed. */
4203 update_text_area (w
, vpos
)
4207 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4208 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4211 /* Let functions in xterm.c know what area subsequent X positions
4212 will be relative to. */
4213 updated_area
= TEXT_AREA
;
4215 /* If rows are at different X or Y, or rows have different height,
4216 or the current row is marked invalid, write the entire line. */
4217 if (!current_row
->enabled_p
4218 || desired_row
->y
!= current_row
->y
4219 || desired_row
->ascent
!= current_row
->ascent
4220 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4221 || desired_row
->phys_height
!= current_row
->phys_height
4222 || desired_row
->visible_height
!= current_row
->visible_height
4223 || current_row
->overlapped_p
4224 || current_row
->mouse_face_p
4225 || current_row
->x
!= desired_row
->x
)
4227 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4229 if (desired_row
->used
[TEXT_AREA
])
4230 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4231 desired_row
->used
[TEXT_AREA
]);
4233 /* Clear to end of window. */
4234 rif
->clear_end_of_line (-1);
4240 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4241 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4242 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4243 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4245 /* If the desired row extends its face to the text area end,
4246 make sure we write at least one glyph, so that the face
4247 extension actually takes place. */
4248 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4251 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4255 /* Loop over glyphs that current and desired row may have
4261 /* Skip over glyphs that both rows have in common. These
4262 don't have to be written. We can't skip if the last
4263 current glyph overlaps the glyph to its right. For
4264 example, consider a current row of `if ' with the `f' in
4265 Courier bold so that it overlaps the ` ' to its right.
4266 If the desired row is ` ', we would skip over the space
4267 after the `if' and there would remain a pixel from the
4268 `f' on the screen. */
4269 if (overlapping_glyphs_p
&& i
> 0)
4271 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4274 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4276 can_skip_p
= right
== 0;
4282 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4284 x
+= desired_glyph
->pixel_width
;
4285 ++desired_glyph
, ++current_glyph
, ++i
;
4288 /* Consider the case that the current row contains "xxx
4289 ppp ggg" in italic Courier font, and the desired row
4290 is "xxx ggg". The character `p' has lbearing, `g'
4291 has not. The loop above will stop in front of the
4292 first `p' in the current row. If we would start
4293 writing glyphs there, we wouldn't erase the lbearing
4294 of the `p'. The rest of the lbearing problem is then
4295 taken care of by x_draw_glyphs. */
4296 if (overlapping_glyphs_p
4298 && i
< current_row
->used
[TEXT_AREA
]
4299 && (current_row
->used
[TEXT_AREA
]
4300 != desired_row
->used
[TEXT_AREA
]))
4304 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4306 while (left
> 0 && i
> 0)
4308 --i
, --desired_glyph
, --current_glyph
;
4309 x
-= desired_glyph
->pixel_width
;
4310 left
-= desired_glyph
->pixel_width
;
4315 /* Try to avoid writing the entire rest of the desired row
4316 by looking for a resync point. This mainly prevents
4317 mode line flickering in the case the mode line is in
4318 fixed-pitch font, which it usually will be. */
4319 if (i
< desired_row
->used
[TEXT_AREA
])
4321 int start_x
= x
, start_hpos
= i
;
4322 struct glyph
*start
= desired_glyph
;
4324 int skip_first_p
= !can_skip_p
;
4326 /* Find the next glyph that's equal again. */
4329 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4332 x
+= desired_glyph
->pixel_width
;
4333 current_x
+= current_glyph
->pixel_width
;
4334 ++desired_glyph
, ++current_glyph
, ++i
;
4338 if (i
== start_hpos
|| x
!= current_x
)
4342 desired_glyph
= start
;
4346 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4347 rif
->write_glyphs (start
, i
- start_hpos
);
4352 /* Write the rest. */
4353 if (i
< desired_row
->used
[TEXT_AREA
])
4355 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4356 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4360 /* Maybe clear to end of line. */
4361 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4363 /* If new row extends to the end of the text area, nothing
4364 has to be cleared, if and only if we did a write_glyphs
4365 above. This is made sure by setting desired_stop_pos
4366 appropriately above. */
4367 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4369 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4371 /* If old row extends to the end of the text area, clear. */
4372 if (i
>= desired_row
->used
[TEXT_AREA
])
4373 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4374 desired_row
->x
+ desired_row
->pixel_width
);
4375 rif
->clear_end_of_line (-1);
4378 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4380 /* Otherwise clear to the end of the old row. Everything
4381 after that position should be clear already. */
4384 if (i
>= desired_row
->used
[TEXT_AREA
])
4385 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4386 desired_row
->x
+ desired_row
->pixel_width
);
4388 /* If cursor is displayed at the end of the line, make sure
4389 it's cleared. Nowadays we don't have a phys_cursor_glyph
4390 with which to erase the cursor (because this method
4391 doesn't work with lbearing/rbearing), so we must do it
4393 if (vpos
== w
->phys_cursor
.vpos
4394 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4396 w
->phys_cursor_on_p
= 0;
4400 x
= current_row
->x
+ current_row
->pixel_width
;
4401 rif
->clear_end_of_line (x
);
4410 /* Update row VPOS in window W. Value is non-zero if display has been
4414 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4416 int vpos
, *mouse_face_overwritten_p
;
4418 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4419 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4422 /* Set the row being updated. This is important to let xterm.c
4423 know what line height values are in effect. */
4424 updated_row
= desired_row
;
4426 /* A row can be completely invisible in case a desired matrix was
4427 built with a vscroll and then make_cursor_line_fully_visible shifts
4428 the matrix. Make sure to make such rows current anyway, since
4429 we need the correct y-position, for example, in the current matrix. */
4430 if (desired_row
->mode_line_p
4431 || desired_row
->visible_height
> 0)
4433 xassert (desired_row
->enabled_p
);
4435 /* Update display of the left margin area, if there is one. */
4436 if (!desired_row
->full_width_p
4437 && !NILP (w
->left_margin_width
))
4440 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4443 /* Update the display of the text area. */
4444 if (update_text_area (w
, vpos
))
4447 if (current_row
->mouse_face_p
)
4448 *mouse_face_overwritten_p
= 1;
4451 /* Update display of the right margin area, if there is one. */
4452 if (!desired_row
->full_width_p
4453 && !NILP (w
->right_margin_width
))
4456 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4459 /* Draw truncation marks etc. */
4460 if (!current_row
->enabled_p
4461 || desired_row
->y
!= current_row
->y
4462 || desired_row
->visible_height
!= current_row
->visible_height
4463 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4464 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4465 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4466 || desired_row
->continued_p
!= current_row
->continued_p
4467 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4468 || (desired_row
->indicate_empty_line_p
4469 != current_row
->indicate_empty_line_p
)
4470 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4471 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4472 rif
->after_update_window_line_hook (desired_row
);
4475 /* Update current_row from desired_row. */
4476 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4482 /* Set the cursor after an update of window W. This function may only
4483 be called from update_window. */
4486 set_window_cursor_after_update (w
)
4489 struct frame
*f
= XFRAME (w
->frame
);
4490 int cx
, cy
, vpos
, hpos
;
4492 /* Not intended for frame matrix updates. */
4493 xassert (FRAME_WINDOW_P (f
));
4495 if (cursor_in_echo_area
4496 && !NILP (echo_area_buffer
[0])
4497 /* If we are showing a message instead of the mini-buffer,
4498 show the cursor for the message instead. */
4499 && XWINDOW (minibuf_window
) == w
4500 && EQ (minibuf_window
, echo_area_window
)
4501 /* These cases apply only to the frame that contains
4502 the active mini-buffer window. */
4503 && FRAME_HAS_MINIBUF_P (f
)
4504 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4506 cx
= cy
= vpos
= hpos
= 0;
4508 if (cursor_in_echo_area
>= 0)
4510 /* If the mini-buffer is several lines high, find the last
4511 line that has any text on it. Note: either all lines
4512 are enabled or none. Otherwise we wouldn't be able to
4514 struct glyph_row
*row
, *last_row
;
4515 struct glyph
*glyph
;
4516 int yb
= window_text_bottom_y (w
);
4519 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4523 if (row
->used
[TEXT_AREA
]
4524 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4527 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4533 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4534 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4536 while (last
> start
&& last
->charpos
< 0)
4539 for (glyph
= start
; glyph
< last
; ++glyph
)
4541 cx
+= glyph
->pixel_width
;
4546 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4554 hpos
= w
->cursor
.hpos
;
4555 vpos
= w
->cursor
.vpos
;
4558 /* Window cursor can be out of sync for horizontally split windows. */
4559 hpos
= max (0, hpos
);
4560 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4561 vpos
= max (0, vpos
);
4562 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4563 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4567 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4568 tree rooted at W. */
4571 set_window_update_flags (w
, on_p
)
4577 if (!NILP (w
->hchild
))
4578 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4579 else if (!NILP (w
->vchild
))
4580 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4582 w
->must_be_updated_p
= on_p
;
4584 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4590 /***********************************************************************
4591 Window-Based Scrolling
4592 ***********************************************************************/
4594 /* Structure describing rows in scrolling_window. */
4598 /* Number of occurrences of this row in desired and current matrix. */
4599 int old_uses
, new_uses
;
4601 /* Vpos of row in new matrix. */
4602 int new_line_number
;
4604 /* Bucket index of this row_entry in the hash table row_table. */
4607 /* The row described by this entry. */
4608 struct glyph_row
*row
;
4610 /* Hash collision chain. */
4611 struct row_entry
*next
;
4614 /* A pool to allocate row_entry structures from, and the size of the
4615 pool. The pool is reallocated in scrolling_window when we find
4616 that we need a larger one. */
4618 static struct row_entry
*row_entry_pool
;
4619 static int row_entry_pool_size
;
4621 /* Index of next free entry in row_entry_pool. */
4623 static int row_entry_idx
;
4625 /* The hash table used during scrolling, and the table's size. This
4626 table is used to quickly identify equal rows in the desired and
4629 static struct row_entry
**row_table
;
4630 static int row_table_size
;
4632 /* Vectors of pointers to row_entry structures belonging to the
4633 current and desired matrix, and the size of the vectors. */
4635 static struct row_entry
**old_lines
, **new_lines
;
4636 static int old_lines_size
, new_lines_size
;
4638 /* A pool to allocate run structures from, and its size. */
4640 static struct run
*run_pool
;
4641 static int runs_size
;
4643 /* A vector of runs of lines found during scrolling. */
4645 static struct run
**runs
;
4647 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4648 struct glyph_row
*));
4651 /* Add glyph row ROW to the scrolling hash table during the scrolling
4654 static INLINE
struct row_entry
*
4655 add_row_entry (w
, row
)
4657 struct glyph_row
*row
;
4659 struct row_entry
*entry
;
4660 int i
= row
->hash
% row_table_size
;
4662 entry
= row_table
[i
];
4663 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4664 entry
= entry
->next
;
4668 entry
= row_entry_pool
+ row_entry_idx
++;
4670 entry
->old_uses
= entry
->new_uses
= 0;
4671 entry
->new_line_number
= 0;
4673 entry
->next
= row_table
[i
];
4674 row_table
[i
] = entry
;
4681 /* Try to reuse part of the current display of W by scrolling lines.
4682 HEADER_LINE_P non-zero means W has a top mode line.
4684 The algorithm is taken from Communications of the ACM, Apr78 "A
4685 Technique for Isolating Differences Between Files." It should take
4688 A short outline of the steps of the algorithm
4690 1. Skip lines equal at the start and end of both matrices.
4692 2. Enter rows in the current and desired matrix into a symbol
4693 table, counting how often they appear in both matrices.
4695 3. Rows that appear exactly once in both matrices serve as anchors,
4696 i.e. we assume that such lines are likely to have been moved.
4698 4. Starting from anchor lines, extend regions to be scrolled both
4699 forward and backward.
4703 -1 if all rows were found to be equal.
4704 0 to indicate that we did not scroll the display, or
4705 1 if we did scroll. */
4708 scrolling_window (w
, header_line_p
)
4712 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4713 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4714 int yb
= window_text_bottom_y (w
);
4715 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4716 int nruns
, nbytes
, n
, run_idx
;
4717 struct row_entry
*entry
;
4719 /* Skip over rows equal at the start. */
4720 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4722 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4723 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4728 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4729 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4730 && row_equal_p (w
, c
, d
, 1))
4739 /* Give up if some rows in the desired matrix are not enabled. */
4740 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4743 first_old
= first_new
= i
;
4745 /* Set last_new to the index + 1 of the last enabled row in the
4748 while (i
< desired_matrix
->nrows
- 1
4749 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4750 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4753 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4758 /* Set last_old to the index + 1 of the last enabled row in the
4759 current matrix. We don't look at the enabled flag here because
4760 we plan to reuse part of the display even if other parts are
4763 while (i
< current_matrix
->nrows
- 1)
4765 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4774 /* Skip over rows equal at the bottom. */
4777 while (i
- 1 > first_new
4778 && j
- 1 > first_old
4779 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4780 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4781 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4783 MATRIX_ROW (desired_matrix
, i
- 1),
4784 MATRIX_ROW (current_matrix
, j
- 1), 1))
4789 /* Nothing to do if all rows are equal. */
4790 if (last_new
== first_new
)
4793 /* Reallocate vectors, tables etc. if necessary. */
4795 if (current_matrix
->nrows
> old_lines_size
)
4797 old_lines_size
= current_matrix
->nrows
;
4798 nbytes
= old_lines_size
* sizeof *old_lines
;
4799 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4802 if (desired_matrix
->nrows
> new_lines_size
)
4804 new_lines_size
= desired_matrix
->nrows
;
4805 nbytes
= new_lines_size
* sizeof *new_lines
;
4806 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4809 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4810 if (3 * n
> row_table_size
)
4812 row_table_size
= next_almost_prime (3 * n
);
4813 nbytes
= row_table_size
* sizeof *row_table
;
4814 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4815 bzero (row_table
, nbytes
);
4818 if (n
> row_entry_pool_size
)
4820 row_entry_pool_size
= n
;
4821 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4822 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4825 if (desired_matrix
->nrows
> runs_size
)
4827 runs_size
= desired_matrix
->nrows
;
4828 nbytes
= runs_size
* sizeof *runs
;
4829 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4830 nbytes
= runs_size
* sizeof *run_pool
;
4831 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4834 nruns
= run_idx
= 0;
4837 /* Add rows from the current and desired matrix to the hash table
4838 row_hash_table to be able to find equal ones quickly. */
4840 for (i
= first_old
; i
< last_old
; ++i
)
4842 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4844 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4845 old_lines
[i
] = entry
;
4849 old_lines
[i
] = NULL
;
4852 for (i
= first_new
; i
< last_new
; ++i
)
4854 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4855 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4857 entry
->new_line_number
= i
;
4858 new_lines
[i
] = entry
;
4861 /* Identify moves based on lines that are unique and equal
4862 in both matrices. */
4863 for (i
= first_old
; i
< last_old
;)
4865 && old_lines
[i
]->old_uses
== 1
4866 && old_lines
[i
]->new_uses
== 1)
4869 int new_line
= old_lines
[i
]->new_line_number
;
4870 struct run
*run
= run_pool
+ run_idx
++;
4873 run
->current_vpos
= i
;
4874 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4875 run
->desired_vpos
= new_line
;
4876 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4878 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4880 /* Extend backward. */
4883 while (j
> first_old
4885 && old_lines
[j
] == new_lines
[k
])
4887 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4888 --run
->current_vpos
;
4889 --run
->desired_vpos
;
4892 run
->desired_y
-= h
;
4893 run
->current_y
-= h
;
4897 /* Extend forward. */
4902 && old_lines
[j
] == new_lines
[k
])
4904 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4910 /* Insert run into list of all runs. Order runs by copied
4911 pixel lines. Note that we record runs that don't have to
4912 be copied because they are already in place. This is done
4913 because we can avoid calling update_window_line in this
4915 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4917 for (k
= nruns
; k
> j
; --k
)
4918 runs
[k
] = runs
[k
- 1];
4927 /* Do the moves. Do it in a way that we don't overwrite something
4928 we want to copy later on. This is not solvable in general
4929 because there is only one display and we don't have a way to
4930 exchange areas on this display. Example:
4932 +-----------+ +-----------+
4934 +-----------+ --> +-----------+
4936 +-----------+ +-----------+
4938 Instead, prefer bigger moves, and invalidate moves that would
4939 copy from where we copied to. */
4941 for (i
= 0; i
< nruns
; ++i
)
4942 if (runs
[i
]->nrows
> 0)
4944 struct run
*r
= runs
[i
];
4946 /* Copy on the display. */
4947 if (r
->current_y
!= r
->desired_y
)
4949 rif
->scroll_run_hook (w
, r
);
4951 /* Invalidate runs that copy from where we copied to. */
4952 for (j
= i
+ 1; j
< nruns
; ++j
)
4954 struct run
*p
= runs
[j
];
4956 if ((p
->current_y
>= r
->desired_y
4957 && p
->current_y
< r
->desired_y
+ r
->height
)
4958 || (p
->current_y
+ p
->height
>= r
->desired_y
4959 && (p
->current_y
+ p
->height
4960 < r
->desired_y
+ r
->height
)))
4965 /* Assign matrix rows. */
4966 for (j
= 0; j
< r
->nrows
; ++j
)
4968 struct glyph_row
*from
, *to
;
4969 int to_overlapped_p
;
4971 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4972 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4973 to_overlapped_p
= to
->overlapped_p
;
4974 assign_row (to
, from
);
4975 to
->enabled_p
= 1, from
->enabled_p
= 0;
4976 to
->overlapped_p
= to_overlapped_p
;
4980 /* Clear the hash table, for the next time. */
4981 for (i
= 0; i
< row_entry_idx
; ++i
)
4982 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4984 /* Value is non-zero to indicate that we scrolled the display. */
4990 /************************************************************************
4992 ************************************************************************/
4994 /* Update the desired frame matrix of frame F.
4996 FORCE_P non-zero means that the update should not be stopped by
4997 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4998 should not be tried.
5000 Value is non-zero if update was stopped due to pending input. */
5003 update_frame_1 (f
, force_p
, inhibit_id_p
)
5008 /* Frame matrices to work on. */
5009 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5010 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5013 int preempt_count
= baud_rate
/ 2400 + 1;
5014 extern int input_pending
;
5016 xassert (current_matrix
&& desired_matrix
);
5018 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5019 calculate_costs (f
);
5021 if (preempt_count
<= 0)
5024 if (redisplay_dont_pause
)
5026 else if (!force_p
&& detect_input_pending ())
5032 /* If we cannot insert/delete lines, it's no use trying it. */
5033 if (!line_ins_del_ok
)
5036 /* See if any of the desired lines are enabled; don't compute for
5037 i/d line if just want cursor motion. */
5038 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5039 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5042 /* Try doing i/d line, if not yet inhibited. */
5043 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5044 force_p
|= scrolling (f
);
5046 /* Update the individual lines as needed. Do bottom line first. */
5047 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5048 update_frame_line (f
, desired_matrix
->nrows
- 1);
5050 /* Now update the rest of the lines. */
5051 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5053 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5055 if (FRAME_TERMCAP_P (f
))
5057 /* Flush out every so many lines.
5058 Also flush out if likely to have more than 1k buffered
5059 otherwise. I'm told that some telnet connections get
5060 really screwed by more than 1k output at once. */
5061 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5063 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5066 if (preempt_count
== 1)
5068 #ifdef EMACS_OUTQSIZE
5069 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5070 /* Probably not a tty. Ignore the error and reset
5071 * the outq count. */
5072 outq
= PENDING_OUTPUT_COUNT (stdout
);
5075 if (baud_rate
<= outq
&& baud_rate
> 0)
5076 sleep (outq
/ baud_rate
);
5081 if ((i
- 1) % preempt_count
== 0)
5082 detect_input_pending ();
5084 update_frame_line (f
, i
);
5088 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5090 /* Now just clean up termcap drivers and set cursor, etc. */
5093 if ((cursor_in_echo_area
5094 /* If we are showing a message instead of the mini-buffer,
5095 show the cursor for the message instead of for the
5096 (now hidden) mini-buffer contents. */
5097 || (EQ (minibuf_window
, selected_window
)
5098 && EQ (minibuf_window
, echo_area_window
)
5099 && !NILP (echo_area_buffer
[0])))
5100 /* These cases apply only to the frame that contains
5101 the active mini-buffer window. */
5102 && FRAME_HAS_MINIBUF_P (f
)
5103 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5105 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5108 if (cursor_in_echo_area
< 0)
5110 /* Negative value of cursor_in_echo_area means put
5111 cursor at beginning of line. */
5117 /* Positive value of cursor_in_echo_area means put
5118 cursor at the end of the prompt. If the mini-buffer
5119 is several lines high, find the last line that has
5121 row
= FRAME_HEIGHT (f
);
5127 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5129 /* Frame rows are filled up with spaces that
5130 must be ignored here. */
5131 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5133 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5134 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5137 && (last
- 1)->charpos
< 0)
5143 while (row
> top
&& col
== 0);
5145 /* Make sure COL is not out of range. */
5146 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5148 /* If we have another row, advance cursor into it. */
5149 if (row
< FRAME_HEIGHT (f
) - 1)
5151 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5154 /* Otherwise move it back in range. */
5156 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5160 cursor_to (row
, col
);
5164 /* We have only one cursor on terminal frames. Use it to
5165 display the cursor of the selected window. */
5166 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5167 if (w
->cursor
.vpos
>= 0
5168 /* The cursor vpos may be temporarily out of bounds
5169 in the following situation: There is one window,
5170 with the cursor in the lower half of it. The window
5171 is split, and a message causes a redisplay before
5172 a new cursor position has been computed. */
5173 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5175 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5176 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5178 if (INTEGERP (w
->left_margin_width
))
5179 x
+= XFASTINT (w
->left_margin_width
);
5181 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5189 clear_desired_matrices (f
);
5194 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5198 struct frame
*frame
;
5200 int unchanged_at_top
, unchanged_at_bottom
;
5203 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5204 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5205 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5206 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5208 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5209 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5210 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5212 if (!current_matrix
)
5215 /* Compute hash codes of all the lines. Also calculate number of
5216 changed lines, number of unchanged lines at the beginning, and
5217 number of unchanged lines at the end. */
5219 unchanged_at_top
= 0;
5220 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5221 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5223 /* Give up on this scrolling if some old lines are not enabled. */
5224 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5226 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5227 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5229 /* This line cannot be redrawn, so don't let scrolling mess it. */
5230 new_hash
[i
] = old_hash
[i
];
5231 #define INFINITY 1000000 /* Taken from scroll.c */
5232 draw_cost
[i
] = INFINITY
;
5236 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5237 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5240 if (old_hash
[i
] != new_hash
[i
])
5243 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5245 else if (i
== unchanged_at_top
)
5247 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5250 /* If changed lines are few, don't allow preemption, don't scroll. */
5251 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5252 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5255 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5256 - unchanged_at_bottom
);
5258 if (scroll_region_ok
)
5259 free_at_end_vpos
-= unchanged_at_bottom
;
5260 else if (memory_below_frame
)
5261 free_at_end_vpos
= -1;
5263 /* If large window, fast terminal and few lines in common between
5264 current frame and desired frame, don't bother with i/d calc. */
5265 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5267 10 * scrolling_max_lines_saved (unchanged_at_top
,
5268 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5269 old_hash
, new_hash
, draw_cost
)))
5272 if (window_size
< 2)
5275 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5276 draw_cost
+ unchanged_at_top
- 1,
5277 old_draw_cost
+ unchanged_at_top
- 1,
5278 old_hash
+ unchanged_at_top
- 1,
5279 new_hash
+ unchanged_at_top
- 1,
5280 free_at_end_vpos
- unchanged_at_top
);
5286 /* Count the number of blanks at the start of the vector of glyphs R
5287 which is LEN glyphs long. */
5290 count_blanks (r
, len
)
5296 for (i
= 0; i
< len
; ++i
)
5297 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5304 /* Count the number of glyphs in common at the start of the glyph
5305 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5306 of STR2. Value is the number of equal glyphs equal at the start. */
5309 count_match (str1
, end1
, str2
, end2
)
5310 struct glyph
*str1
, *end1
, *str2
, *end2
;
5312 struct glyph
*p1
= str1
;
5313 struct glyph
*p2
= str2
;
5317 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5324 /* Char insertion/deletion cost vector, from term.c */
5326 extern int *char_ins_del_vector
;
5327 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5330 /* Perform a frame-based update on line VPOS in frame FRAME. */
5333 update_frame_line (f
, vpos
)
5337 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5339 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5340 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5341 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5342 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5343 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5344 int must_write_whole_line_p
;
5345 int write_spaces_p
= must_write_spaces
;
5346 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5347 != FACE_TTY_DEFAULT_BG_COLOR
);
5349 if (colored_spaces_p
)
5352 if (desired_row
->inverse_p
5353 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5355 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5356 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5357 current_row
->enabled_p
= 0;
5360 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5362 /* Current row not enabled means it has unknown contents. We must
5363 write the whole desired line in that case. */
5364 must_write_whole_line_p
= !current_row
->enabled_p
;
5365 if (must_write_whole_line_p
)
5372 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5373 olen
= current_row
->used
[TEXT_AREA
];
5375 if (!current_row
->inverse_p
)
5377 /* Ignore trailing spaces, if we can. */
5378 if (!write_spaces_p
)
5379 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5384 /* For an inverse-video line, make sure it's filled with
5385 spaces all the way to the frame edge so that the reverse
5386 video extends all the way across. */
5387 while (olen
< FRAME_WIDTH (f
) - 1)
5388 obody
[olen
++] = space_glyph
;
5392 current_row
->enabled_p
= 1;
5393 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5394 current_row
->inverse_p
= desired_row
->inverse_p
;
5396 /* If desired line is empty, just clear the line. */
5397 if (!desired_row
->enabled_p
)
5403 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5404 nlen
= desired_row
->used
[TEXT_AREA
];
5405 nend
= nbody
+ nlen
;
5407 /* If display line has unknown contents, write the whole line. */
5408 if (must_write_whole_line_p
)
5410 /* Ignore spaces at the end, if we can. */
5411 if (!write_spaces_p
)
5412 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5415 /* Write the contents of the desired line. */
5418 cursor_to (vpos
, 0);
5419 write_glyphs (nbody
, nlen
);
5422 /* Don't call clear_end_of_line if we already wrote the whole
5423 line. The cursor will not be at the right margin in that
5424 case but in the line below. */
5425 if (nlen
< FRAME_WINDOW_WIDTH (f
))
5427 cursor_to (vpos
, nlen
);
5428 clear_end_of_line (FRAME_WINDOW_WIDTH (f
));
5431 /* Make sure we are in the right row, otherwise cursor movement
5432 with cmgoto might use `ch' in the wrong row. */
5433 cursor_to (vpos
, 0);
5435 make_current (desired_matrix
, current_matrix
, vpos
);
5439 /* Pretend trailing spaces are not there at all,
5440 unless for one reason or another we must write all spaces. */
5441 if (!desired_row
->inverse_p
)
5443 if (!write_spaces_p
)
5444 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5449 /* For an inverse-video line, give it extra trailing spaces all
5450 the way to the frame edge so that the reverse video extends
5451 all the way across. */
5452 while (nlen
< FRAME_WIDTH (f
) - 1)
5453 nbody
[nlen
++] = space_glyph
;
5456 /* If there's no i/d char, quickly do the best we can without it. */
5457 if (!char_ins_del_ok
)
5461 /* Find the first glyph in desired row that doesn't agree with
5462 a glyph in the current row, and write the rest from there on. */
5463 for (i
= 0; i
< nlen
; i
++)
5465 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5467 /* Find the end of the run of different glyphs. */
5471 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5472 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5475 /* Output this run of non-matching chars. */
5476 cursor_to (vpos
, i
);
5477 write_glyphs (nbody
+ i
, j
- i
);
5480 /* Now find the next non-match. */
5484 /* Clear the rest of the line, or the non-clear part of it. */
5487 cursor_to (vpos
, nlen
);
5488 clear_end_of_line (olen
);
5491 /* Make current row = desired row. */
5492 make_current (desired_matrix
, current_matrix
, vpos
);
5496 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5497 characters in a row. */
5501 /* If current line is blank, skip over initial spaces, if
5502 possible, and write the rest. */
5503 if (write_spaces_p
|| desired_row
->inverse_p
)
5506 nsp
= count_blanks (nbody
, nlen
);
5510 cursor_to (vpos
, nsp
);
5511 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5514 /* Exchange contents between current_frame and new_frame. */
5515 make_current (desired_matrix
, current_matrix
, vpos
);
5519 /* Compute number of leading blanks in old and new contents. */
5520 osp
= count_blanks (obody
, olen
);
5521 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5523 : count_blanks (nbody
, nlen
));
5525 /* Compute number of matching chars starting with first non-blank. */
5526 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5527 nbody
+ nsp
, nbody
+ nlen
);
5529 /* Spaces in new match implicit space past the end of old. */
5530 /* A bug causing this to be a no-op was fixed in 18.29. */
5531 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5534 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5538 /* Avoid doing insert/delete char
5539 just cause number of leading spaces differs
5540 when the following text does not match. */
5541 if (begmatch
== 0 && osp
!= nsp
)
5542 osp
= nsp
= min (osp
, nsp
);
5544 /* Find matching characters at end of line */
5547 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5549 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5554 endmatch
= obody
+ olen
- op1
;
5556 /* tem gets the distance to insert or delete.
5557 endmatch is how many characters we save by doing so.
5560 tem
= (nlen
- nsp
) - (olen
- osp
);
5562 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5565 /* nsp - osp is the distance to insert or delete.
5566 If that is nonzero, begmatch is known to be nonzero also.
5567 begmatch + endmatch is how much we save by doing the ins/del.
5571 && (!char_ins_del_ok
5572 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5576 osp
= nsp
= min (osp
, nsp
);
5579 /* Now go through the line, inserting, writing and
5580 deleting as appropriate. */
5584 cursor_to (vpos
, nsp
);
5585 delete_glyphs (osp
- nsp
);
5589 /* If going to delete chars later in line
5590 and insert earlier in the line,
5591 must delete first to avoid losing data in the insert */
5592 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5594 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5595 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5596 olen
= nlen
- (nsp
- osp
);
5598 cursor_to (vpos
, osp
);
5599 insert_glyphs (0, nsp
- osp
);
5603 tem
= nsp
+ begmatch
+ endmatch
;
5604 if (nlen
!= tem
|| olen
!= tem
)
5606 if (!endmatch
|| nlen
== olen
)
5608 /* If new text being written reaches right margin, there is
5609 no need to do clear-to-eol at the end of this function
5610 (and it would not be safe, since cursor is not going to
5611 be "at the margin" after the text is done). */
5612 if (nlen
== FRAME_WINDOW_WIDTH (f
))
5615 /* Function write_glyphs is prepared to do nothing
5616 if passed a length <= 0. Check it here to avoid
5617 unnecessary cursor movement. */
5620 cursor_to (vpos
, nsp
+ begmatch
);
5621 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5624 else if (nlen
> olen
)
5626 /* Here, we used to have the following simple code:
5627 ----------------------------------------
5628 write_glyphs (nbody + nsp + begmatch, olen - tem);
5629 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5630 ----------------------------------------
5631 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5632 is a padding glyph. */
5633 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5636 cursor_to (vpos
, nsp
+ begmatch
);
5638 /* Calculate columns we can actually overwrite. */
5639 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5641 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5643 /* If we left columns to be overwritten, we must delete them. */
5644 del
= olen
- tem
- out
;
5646 delete_glyphs (del
);
5648 /* At last, we insert columns not yet written out. */
5649 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5652 else if (olen
> nlen
)
5654 cursor_to (vpos
, nsp
+ begmatch
);
5655 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5656 delete_glyphs (olen
- nlen
);
5662 /* If any unerased characters remain after the new line, erase them. */
5665 cursor_to (vpos
, nlen
);
5666 clear_end_of_line (olen
);
5669 /* Exchange contents between current_frame and new_frame. */
5670 make_current (desired_matrix
, current_matrix
, vpos
);
5675 /***********************************************************************
5676 X/Y Position -> Buffer Position
5677 ***********************************************************************/
5679 /* Determine what's under window-relative pixel position (*X, *Y).
5680 Return in *OBJECT the object (string or buffer) that's there.
5681 Return in *POS the position in that object. Adjust *X and *Y
5682 to character boundaries. */
5685 buffer_posn_from_coords (w
, x
, y
, object
, pos
)
5688 Lisp_Object
*object
;
5689 struct display_pos
*pos
;
5692 struct buffer
*old_current_buffer
= current_buffer
;
5693 struct text_pos startp
;
5694 int left_area_width
;
5696 current_buffer
= XBUFFER (w
->buffer
);
5697 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5698 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5699 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5700 start_display (&it
, w
, startp
);
5702 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5703 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5704 MOVE_TO_X
| MOVE_TO_Y
);
5706 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5708 current_buffer
= old_current_buffer
;
5710 *object
= STRINGP (it
.string
) ? it
.string
: w
->buffer
;
5715 /* Value is the string under window-relative coordinates X/Y in the
5716 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5717 means look at the mode line. *CHARPOS is set to the position in
5718 the string returned. */
5721 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5723 int x
, y
, mode_line_p
;
5726 struct glyph_row
*row
;
5727 struct glyph
*glyph
, *end
;
5728 struct frame
*f
= XFRAME (w
->frame
);
5730 Lisp_Object string
= Qnil
;
5733 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5735 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5737 if (row
->mode_line_p
&& row
->enabled_p
)
5739 /* The mode lines are displayed over scroll bars and bitmap
5740 areas, and X is window-relative. Correct X by the scroll bar
5741 and bitmap area width. */
5742 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5743 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5744 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5746 /* Find the glyph under X. If we find one with a string object,
5747 it's the one we were looking for. */
5748 glyph
= row
->glyphs
[TEXT_AREA
];
5749 end
= glyph
+ row
->used
[TEXT_AREA
];
5750 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5751 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5753 string
= glyph
->object
;
5754 *charpos
= glyph
->charpos
;
5763 /***********************************************************************
5764 Changing Frame Sizes
5765 ***********************************************************************/
5770 window_change_signal (signalnum
) /* If we don't have an argument, */
5771 int signalnum
; /* some compilers complain in signal calls. */
5777 int old_errno
= errno
;
5779 get_frame_size (&width
, &height
);
5781 /* The frame size change obviously applies to a termcap-controlled
5782 frame. Find such a frame in the list, and assume it's the only
5783 one (since the redisplay code always writes to stdout, not a
5784 FILE * specified in the frame structure). Record the new size,
5785 but don't reallocate the data structures now. Let that be done
5786 later outside of the signal handler. */
5789 Lisp_Object tail
, frame
;
5791 FOR_EACH_FRAME (tail
, frame
)
5793 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5795 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5801 signal (SIGWINCH
, window_change_signal
);
5804 #endif /* SIGWINCH */
5807 /* Do any change in frame size that was requested by a signal. SAFE
5808 non-zero means this function is called from a place where it is
5809 safe to change frame sizes while a redisplay is in progress. */
5812 do_pending_window_change (safe
)
5815 /* If window_change_signal should have run before, run it now. */
5816 if (redisplaying_p
&& !safe
)
5819 while (delayed_size_change
)
5821 Lisp_Object tail
, frame
;
5823 delayed_size_change
= 0;
5825 FOR_EACH_FRAME (tail
, frame
)
5827 struct frame
*f
= XFRAME (frame
);
5829 int height
= FRAME_NEW_HEIGHT (f
);
5830 int width
= FRAME_NEW_WIDTH (f
);
5832 if (height
!= 0 || width
!= 0)
5833 change_frame_size (f
, height
, width
, 0, 0, safe
);
5839 /* Change the frame height and/or width. Values may be given as zero to
5840 indicate no change is to take place.
5842 If DELAY is non-zero, then assume we're being called from a signal
5843 handler, and queue the change for later - perhaps the next
5844 redisplay. Since this tries to resize windows, we can't call it
5845 from a signal handler.
5847 SAFE non-zero means this function is called from a place where it's
5848 safe to change frame sizes while a redisplay is in progress. */
5851 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5852 register struct frame
*f
;
5853 int newheight
, newwidth
, pretend
, delay
, safe
;
5855 Lisp_Object tail
, frame
;
5857 if (! FRAME_WINDOW_P (f
))
5859 /* When using termcap, or on MS-DOS, all frames use
5860 the same screen, so a change in size affects all frames. */
5861 FOR_EACH_FRAME (tail
, frame
)
5862 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5863 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5864 pretend
, delay
, safe
);
5867 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5871 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5872 register struct frame
*f
;
5873 int newheight
, newwidth
, pretend
, delay
, safe
;
5875 int new_frame_window_width
;
5876 int count
= specpdl_ptr
- specpdl
;
5878 /* If we can't deal with the change now, queue it for later. */
5879 if (delay
|| (redisplaying_p
&& !safe
))
5881 FRAME_NEW_HEIGHT (f
) = newheight
;
5882 FRAME_NEW_WIDTH (f
) = newwidth
;
5883 delayed_size_change
= 1;
5887 /* This size-change overrides any pending one for this frame. */
5888 FRAME_NEW_HEIGHT (f
) = 0;
5889 FRAME_NEW_WIDTH (f
) = 0;
5891 /* If an argument is zero, set it to the current value. */
5893 newheight
= FRAME_HEIGHT (f
);
5895 newwidth
= FRAME_WIDTH (f
);
5897 /* Compute width of windows in F.
5898 This is the width of the frame without vertical scroll bars. */
5899 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5901 /* Round up to the smallest acceptable size. */
5902 check_frame_size (f
, &newheight
, &newwidth
);
5904 /* If we're not changing the frame size, quit now. */
5905 if (newheight
== FRAME_HEIGHT (f
)
5906 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5912 /* We only can set screen dimensions to certain values supported
5913 by our video hardware. Try to find the smallest size greater
5914 or equal to the requested dimensions. */
5915 dos_set_window_size (&newheight
, &newwidth
);
5918 if (newheight
!= FRAME_HEIGHT (f
))
5920 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5922 /* Frame has both root and mini-buffer. */
5923 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5924 FRAME_TOP_MARGIN (f
));
5925 set_window_height (FRAME_ROOT_WINDOW (f
),
5928 - FRAME_TOP_MARGIN (f
)),
5930 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5932 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5935 /* Frame has just one top-level window. */
5936 set_window_height (FRAME_ROOT_WINDOW (f
),
5937 newheight
- FRAME_TOP_MARGIN (f
), 0);
5939 if (FRAME_TERMCAP_P (f
) && !pretend
)
5940 FrameRows
= newheight
;
5943 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5945 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5946 if (FRAME_HAS_MINIBUF_P (f
))
5947 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5949 if (FRAME_TERMCAP_P (f
) && !pretend
)
5950 FrameCols
= newwidth
;
5952 if (WINDOWP (f
->tool_bar_window
))
5953 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5956 FRAME_HEIGHT (f
) = newheight
;
5957 SET_FRAME_WIDTH (f
, newwidth
);
5960 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5961 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5963 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5965 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5966 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5967 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5968 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5972 SET_FRAME_GARBAGED (f
);
5973 calculate_costs (f
);
5977 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5979 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5980 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5981 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5983 unbind_to (count
, Qnil
);
5988 /***********************************************************************
5989 Terminal Related Lisp Functions
5990 ***********************************************************************/
5992 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5993 1, 1, "FOpen termscript file: ",
5994 "Start writing all terminal output to FILE as well as the terminal.\n\
5995 FILE = nil means just close any termscript file currently open.")
5999 if (termscript
!= 0) fclose (termscript
);
6004 file
= Fexpand_file_name (file
, Qnil
);
6005 termscript
= fopen (XSTRING (file
)->data
, "w");
6006 if (termscript
== 0)
6007 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6013 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6014 Ssend_string_to_terminal
, 1, 1, 0,
6015 "Send STRING to the terminal without alteration.\n\
6016 Control characters in STRING will have terminal-dependent effects.")
6020 /* ??? Perhaps we should do something special for multibyte strings here. */
6021 CHECK_STRING (string
, 0);
6022 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
6026 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
6028 fflush (termscript
);
6034 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6035 "Beep, or flash the screen.\n\
6036 Also, unless an argument is given,\n\
6037 terminate any keyboard macro currently executing.")
6060 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6061 error ("Keyboard macro terminated by a command ringing the bell");
6069 /***********************************************************************
6071 ***********************************************************************/
6073 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6074 "Pause, without updating display, for SECONDS seconds.\n\
6075 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6076 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6077 additional wait period, in milliseconds; this may be useful if your\n\
6078 Emacs was built without floating point support.\n\
6079 \(Not all operating systems support waiting for a fraction of a second.)")
6080 (seconds
, milliseconds
)
6081 Lisp_Object seconds
, milliseconds
;
6085 if (NILP (milliseconds
))
6086 XSETINT (milliseconds
, 0);
6088 CHECK_NUMBER (milliseconds
, 1);
6089 usec
= XINT (milliseconds
) * 1000;
6092 double duration
= extract_float (seconds
);
6093 sec
= (int) duration
;
6094 usec
+= (duration
- sec
) * 1000000;
6097 #ifndef EMACS_HAS_USECS
6098 if (sec
== 0 && usec
!= 0)
6099 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6102 /* Assure that 0 <= usec < 1000000. */
6105 /* We can't rely on the rounding being correct if user is negative. */
6106 if (-1000000 < usec
)
6107 sec
--, usec
+= 1000000;
6109 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6112 sec
+= usec
/ 1000000, usec
%= 1000000;
6114 if (sec
< 0 || (sec
== 0 && usec
== 0))
6120 XSETFASTINT (zero
, 0);
6121 wait_reading_process_input (sec
, usec
, zero
, 0);
6124 /* We should always have wait_reading_process_input; we have a dummy
6125 implementation for systems which don't support subprocesses. */
6127 /* No wait_reading_process_input */
6134 /* The reason this is done this way
6135 (rather than defined (H_S) && defined (H_T))
6136 is because the VMS preprocessor doesn't grok `defined' */
6138 EMACS_GET_TIME (end_time
);
6139 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6140 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6144 EMACS_GET_TIME (timeout
);
6145 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6146 if (EMACS_TIME_NEG_P (timeout
)
6147 || !select (1, 0, 0, 0, &timeout
))
6150 #else /* not HAVE_SELECT */
6152 #endif /* HAVE_SELECT */
6153 #endif /* not VMS */
6156 #endif /* no subprocesses */
6162 /* This is just like wait_reading_process_input, except that
6163 it does the redisplay.
6165 It's also much like Fsit_for, except that it can be used for
6166 waiting for input as well. */
6169 sit_for (sec
, usec
, reading
, display
, initial_display
)
6170 int sec
, usec
, reading
, display
, initial_display
;
6172 Lisp_Object read_kbd
;
6174 swallow_events (display
);
6176 if (detect_input_pending_run_timers (display
))
6179 if (initial_display
)
6180 redisplay_preserve_echo_area (2);
6182 if (sec
== 0 && usec
== 0)
6189 XSETINT (read_kbd
, reading
? -1 : 1);
6190 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6192 return detect_input_pending () ? Qnil
: Qt
;
6196 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6197 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
6198 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6199 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6200 additional wait period, in milliseconds; this may be useful if your\n\
6201 Emacs was built without floating point support.\n\
6202 \(Not all operating systems support waiting for a fraction of a second.)\n\
6203 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
6204 Redisplay is preempted as always if input arrives, and does not happen\n\
6205 if input is available before it starts.\n\
6206 Value is t if waited the full time with no input arriving.")
6207 (seconds
, milliseconds
, nodisp
)
6208 Lisp_Object seconds
, milliseconds
, nodisp
;
6212 if (NILP (milliseconds
))
6213 XSETINT (milliseconds
, 0);
6215 CHECK_NUMBER (milliseconds
, 1);
6216 usec
= XINT (milliseconds
) * 1000;
6219 double duration
= extract_float (seconds
);
6220 sec
= (int) duration
;
6221 usec
+= (duration
- sec
) * 1000000;
6224 #ifndef EMACS_HAS_USECS
6225 if (usec
!= 0 && sec
== 0)
6226 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6229 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6234 /***********************************************************************
6235 Other Lisp Functions
6236 ***********************************************************************/
6238 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6239 session's frames, frame names, buffers, buffer-read-only flags, and
6240 buffer-modified-flags, and a trailing sentinel (so we don't need to
6241 add length checks). */
6243 static Lisp_Object frame_and_buffer_state
;
6246 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6247 Sframe_or_buffer_changed_p
, 0, 0, 0,
6248 "Return non-nil if the frame and buffer state appears to have changed.\n\
6249 The state variable is an internal vector containing all frames and buffers,\n\
6250 aside from buffers whose names start with space,\n\
6251 along with the buffers' read-only and modified flags, which allows a fast\n\
6252 check to see whether the menu bars might need to be recomputed.\n\
6253 If this function returns non-nil, it updates the internal vector to reflect\n\
6254 the current state.\n")
6257 Lisp_Object tail
, frame
, buf
;
6261 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6262 FOR_EACH_FRAME (tail
, frame
)
6264 if (!EQ (*vecp
++, frame
))
6266 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6269 /* Check that the buffer info matches.
6270 No need to test for the end of the vector
6271 because the last element of the vector is lambda
6272 and that will always cause a mismatch. */
6273 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6275 buf
= XCDR (XCAR (tail
));
6276 /* Ignore buffers that aren't included in buffer lists. */
6277 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6279 if (!EQ (*vecp
++, buf
))
6281 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6283 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6286 /* Detect deletion of a buffer at the end of the list. */
6287 if (EQ (*vecp
, Qlambda
))
6290 /* Start with 1 so there is room for at least one lambda at the end. */
6292 FOR_EACH_FRAME (tail
, frame
)
6294 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6296 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6297 if (n
> XVECTOR (frame_and_buffer_state
)->size
6298 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6299 /* Add 20 extra so we grow it less often. */
6300 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6301 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6302 FOR_EACH_FRAME (tail
, frame
)
6305 *vecp
++ = XFRAME (frame
)->name
;
6307 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6309 buf
= XCDR (XCAR (tail
));
6310 /* Ignore buffers that aren't included in buffer lists. */
6311 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6314 *vecp
++ = XBUFFER (buf
)->read_only
;
6315 *vecp
++ = Fbuffer_modified_p (buf
);
6317 /* Fill up the vector with lambdas (always at least one). */
6319 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6320 < XVECTOR (frame_and_buffer_state
)->size
)
6322 /* Make sure we didn't overflow the vector. */
6323 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6324 > XVECTOR (frame_and_buffer_state
)->size
)
6331 /***********************************************************************
6333 ***********************************************************************/
6335 char *terminal_type
;
6337 /* Initialization done when Emacs fork is started, before doing stty.
6338 Determine terminal type and set terminal_driver. Then invoke its
6339 decoding routine to set up variables in the terminal package. */
6344 #ifdef HAVE_X_WINDOWS
6345 extern int display_arg
;
6348 /* Construct the space glyph. */
6349 space_glyph
.type
= CHAR_GLYPH
;
6350 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6351 space_glyph
.charpos
= -1;
6355 cursor_in_echo_area
= 0;
6356 terminal_type
= (char *) 0;
6358 /* Now is the time to initialize this; it's used by init_sys_modes
6360 Vwindow_system
= Qnil
;
6362 /* If the user wants to use a window system, we shouldn't bother
6363 initializing the terminal. This is especially important when the
6364 terminal is so dumb that emacs gives up before and doesn't bother
6365 using the window system.
6367 If the DISPLAY environment variable is set and nonempty,
6368 try to use X, and die with an error message if that doesn't work. */
6370 #ifdef HAVE_X_WINDOWS
6375 display
= getenv ("DECW$DISPLAY");
6377 display
= getenv ("DISPLAY");
6380 display_arg
= (display
!= 0 && *display
!= 0);
6383 if (!inhibit_window_system
&& display_arg
6389 Vwindow_system
= intern ("x");
6391 Vwindow_system_version
= make_number (11);
6393 Vwindow_system_version
= make_number (10);
6395 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6396 /* In some versions of ncurses,
6397 tputs crashes if we have not called tgetent.
6399 { char b
[2044]; tgetent (b
, "xterm");}
6401 adjust_frame_glyphs_initially ();
6404 #endif /* HAVE_X_WINDOWS */
6407 if (!inhibit_window_system
)
6409 Vwindow_system
= intern ("w32");
6410 Vwindow_system_version
= make_number (1);
6411 adjust_frame_glyphs_initially ();
6414 #endif /* HAVE_NTGUI */
6417 if (!inhibit_window_system
)
6419 Vwindow_system
= intern ("mac");
6420 Vwindow_system_version
= make_number (1);
6421 adjust_frame_glyphs_initially ();
6424 #endif /* macintosh */
6426 /* If no window system has been specified, try to use the terminal. */
6429 fatal ("standard input is not a tty");
6433 /* Look at the TERM variable */
6434 terminal_type
= (char *) getenv ("TERM");
6438 fprintf (stderr
, "Please specify your terminal type.\n\
6439 For types defined in VMS, use set term /device=TYPE.\n\
6440 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6441 \(The quotation marks are necessary since terminal types are lower case.)\n");
6443 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6449 /* VMS DCL tends to up-case things, so down-case term type.
6450 Hardly any uppercase letters in terminal types; should be none. */
6452 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6455 strcpy (new, terminal_type
);
6457 for (p
= new; *p
; p
++)
6461 terminal_type
= new;
6465 term_init (terminal_type
);
6468 struct frame
*sf
= SELECTED_FRAME ();
6469 int width
= FRAME_WINDOW_WIDTH (sf
);
6470 int height
= FRAME_HEIGHT (sf
);
6472 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6474 /* If these sizes are so big they cause overflow, just ignore the
6475 change. It's not clear what better we could do. */
6476 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6477 fatal ("screen size %dx%d too big", width
, height
);
6480 adjust_frame_glyphs_initially ();
6481 calculate_costs (XFRAME (selected_frame
));
6486 #endif /* CANNOT_DUMP */
6487 signal (SIGWINCH
, window_change_signal
);
6488 #endif /* SIGWINCH */
6490 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6494 /* The MSDOS terminal turns on its ``window system'' relatively
6495 late into the startup, so we cannot do the frame faces'
6496 initialization just yet. It will be done later by pc-win.el
6497 and internal_terminal_init. */
6498 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6500 && NILP (Vwindow_system
))
6502 /* For the initial frame, we don't have any way of knowing what
6503 are the foreground and background colors of the terminal. */
6504 struct frame
*sf
= SELECTED_FRAME();
6506 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6507 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6508 call0 (intern ("tty-set-up-initial-frame-faces"));
6514 /***********************************************************************
6516 ***********************************************************************/
6518 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6519 Sinternal_show_cursor
, 2, 2, 0,
6520 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6521 WINDOW nil means use the selected window. SHOW non-nil means\n\
6522 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6523 don't show a cursor.")
6525 Lisp_Object window
, show
;
6527 /* Don't change cursor state while redisplaying. This could confuse
6529 if (!redisplaying_p
)
6532 window
= selected_window
;
6534 CHECK_WINDOW (window
, 2);
6536 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6543 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6544 Sinternal_show_cursor_p
, 0, 1, 0,
6545 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6546 WINDOW nil or omitted means report on the selected window.")
6553 window
= selected_window
;
6555 CHECK_WINDOW (window
, 2);
6557 w
= XWINDOW (window
);
6558 return w
->cursor_off_p
? Qnil
: Qt
;
6562 /***********************************************************************
6564 ***********************************************************************/
6569 defsubr (&Sredraw_frame
);
6570 defsubr (&Sredraw_display
);
6571 defsubr (&Sframe_or_buffer_changed_p
);
6572 defsubr (&Sopen_termscript
);
6574 defsubr (&Ssit_for
);
6575 defsubr (&Ssleep_for
);
6576 defsubr (&Ssend_string_to_terminal
);
6577 defsubr (&Sinternal_show_cursor
);
6578 defsubr (&Sinternal_show_cursor_p
);
6581 defsubr (&Sdump_redisplay_history
);
6584 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6585 staticpro (&frame_and_buffer_state
);
6587 Qdisplay_table
= intern ("display-table");
6588 staticpro (&Qdisplay_table
);
6589 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6590 staticpro (&Qredisplay_dont_pause
);
6592 DEFVAR_INT ("baud-rate", &baud_rate
,
6593 "*The output baud rate of the terminal.\n\
6594 On most systems, changing this value will affect the amount of padding\n\
6595 and the other strategic decisions made during redisplay.");
6597 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6598 "*Non-nil means invert the entire frame display.\n\
6599 This means everything is in inverse video which otherwise would not be.");
6601 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6602 "*Non-nil means try to flash the frame to represent a bell.");
6604 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6605 "*Non-nil means no need to redraw entire frame after suspending.\n\
6606 A non-nil value is useful if the terminal can automatically preserve\n\
6607 Emacs's frame display when you reenter Emacs.\n\
6608 It is up to you to set this variable if your terminal can do that.");
6610 DEFVAR_LISP ("window-system", &Vwindow_system
,
6611 "A symbol naming the window-system under which Emacs is running\n\
6612 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6614 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6615 "The version number of the window system in use.\n\
6616 For X windows, this is 10 or 11.");
6618 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6619 "Non-nil means put cursor in minibuffer, at end of any message there.");
6621 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6622 "Table defining how to output a glyph code to the frame.\n\
6623 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6624 Each element can be:\n\
6625 integer: a glyph code which this glyph is an alias for.\n\
6626 string: output this glyph using that string (not impl. in X windows).\n\
6627 nil: this glyph mod 524288 is the code of a character to output,\n\
6628 and this glyph / 524288 is the face number (see `face-id') to use\n\
6629 while outputting it.");
6630 Vglyph_table
= Qnil
;
6632 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6633 "Display table to use for buffers that specify none.\n\
6634 See `buffer-display-table' for more information.");
6635 Vstandard_display_table
= Qnil
;
6637 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6638 "*Non-nil means update isn't paused when input is detected.");
6639 redisplay_dont_pause
= 0;
6641 /* Initialize `window-system', unless init_display already decided it. */
6646 Vwindow_system
= Qnil
;
6647 Vwindow_system_version
= Qnil
;