1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000
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 (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);
778 /* Mark rows in a current matrix of a window as not having valid
779 contents. It's important to not do this for desired matrices.
780 When Emacs starts, it may already be building desired matrices
781 when this function runs. */
782 if (w
&& matrix
== w
->current_matrix
)
784 if (window_width
< 0)
785 window_width
= window_box_width (w
, -1);
787 /* Optimize the case that only the height has changed (C-x 2,
788 upper window). Invalidate all rows that are no longer part
790 if (!marginal_areas_changed_p
791 && matrix
->window_left_x
== XFASTINT (w
->left
)
792 && matrix
->window_top_y
== XFASTINT (w
->top
)
793 && matrix
->window_width
== window_box_width (w
, -1))
796 while (matrix
->rows
[i
].enabled_p
797 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
798 < matrix
->window_height
))
801 /* Window end is invalid, if inside of the rows that
803 if (INTEGERP (w
->window_end_vpos
)
804 && XFASTINT (w
->window_end_vpos
) >= i
)
805 w
->window_end_valid
= Qnil
;
807 while (i
< matrix
->nrows
)
808 matrix
->rows
[i
++].enabled_p
= 0;
812 for (i
= 0; i
< matrix
->nrows
; ++i
)
813 matrix
->rows
[i
].enabled_p
= 0;
817 /* Remember last values to be able to optimize frame redraws. */
818 matrix
->matrix_x
= x
;
819 matrix
->matrix_y
= y
;
820 matrix
->matrix_w
= dim
.width
;
821 matrix
->matrix_h
= dim
.height
;
823 /* Record the top y location and height of W at the time the matrix
824 was last adjusted. This is used to optimize redisplay above. */
827 matrix
->window_left_x
= XFASTINT (w
->left
);
828 matrix
->window_top_y
= XFASTINT (w
->top
);
829 matrix
->window_height
= window_height
;
830 matrix
->window_width
= window_width
;
831 matrix
->window_vscroll
= w
->vscroll
;
836 /* Reverse the contents of rows in MATRIX between START and END. The
837 contents of the row at END - 1 end up at START, END - 2 at START +
838 1 etc. This is part of the implementation of rotate_matrix (see
842 reverse_rows (matrix
, start
, end
)
843 struct glyph_matrix
*matrix
;
848 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
850 /* Non-ISO HP/UX compiler doesn't like auto struct
852 struct glyph_row temp
;
853 temp
= matrix
->rows
[i
];
854 matrix
->rows
[i
] = matrix
->rows
[j
];
855 matrix
->rows
[j
] = temp
;
860 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
861 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
862 indices. (Note: this does not copy glyphs, only glyph pointers in
863 row structures are moved around).
865 The algorithm used for rotating the vector was, I believe, first
866 described by Kernighan. See the vector R as consisting of two
867 sub-vectors AB, where A has length BY for BY >= 0. The result
868 after rotating is then BA. Reverse both sub-vectors to get ArBr
869 and reverse the result to get (ArBr)r which is BA. Similar for
873 rotate_matrix (matrix
, first
, last
, by
)
874 struct glyph_matrix
*matrix
;
879 /* Up (rotate left, i.e. towards lower indices). */
881 reverse_rows (matrix
, first
, first
+ by
);
882 reverse_rows (matrix
, first
+ by
, last
);
883 reverse_rows (matrix
, first
, last
);
887 /* Down (rotate right, i.e. towards higher indices). */
888 reverse_rows (matrix
, last
- by
, last
);
889 reverse_rows (matrix
, first
, last
- by
);
890 reverse_rows (matrix
, first
, last
);
895 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
896 with indices START <= index < END. Increment positions by DELTA/
900 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
901 struct glyph_matrix
*matrix
;
902 int start
, end
, delta
, delta_bytes
;
904 /* Check that START and END are reasonable values. */
905 xassert (start
>= 0 && start
<= matrix
->nrows
);
906 xassert (end
>= 0 && end
<= matrix
->nrows
);
907 xassert (start
<= end
);
909 for (; start
< end
; ++start
)
910 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
914 /* Enable a range of rows in glyph matrix MATRIX. START and END are
915 the row indices of the first and last + 1 row to enable. If
916 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
919 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
920 struct glyph_matrix
*matrix
;
924 xassert (start
<= end
);
925 xassert (start
>= 0 && start
< matrix
->nrows
);
926 xassert (end
>= 0 && end
<= matrix
->nrows
);
928 for (; start
< end
; ++start
)
929 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
935 This empties all rows in MATRIX by setting the enabled_p flag for
936 all rows of the matrix to zero. The function prepare_desired_row
937 will eventually really clear a row when it sees one with a zero
940 Resets update hints to defaults value. The only update hint
941 currently present is the flag MATRIX->no_scrolling_p. */
944 clear_glyph_matrix (matrix
)
945 struct glyph_matrix
*matrix
;
949 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
950 matrix
->no_scrolling_p
= 0;
955 /* Shift part of the glyph matrix MATRIX of window W up or down.
956 Increment y-positions in glyph rows between START and END by DY,
957 and recompute their visible height. */
960 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
962 struct glyph_matrix
*matrix
;
967 xassert (start
<= end
);
968 xassert (start
>= 0 && start
< matrix
->nrows
);
969 xassert (end
>= 0 && end
<= matrix
->nrows
);
971 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
972 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
974 for (; start
< end
; ++start
)
976 struct glyph_row
*row
= &matrix
->rows
[start
];
981 row
->visible_height
= row
->height
- (min_y
- row
->y
);
982 else if (row
->y
+ row
->height
> max_y
)
983 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
985 row
->visible_height
= row
->height
;
990 /* Mark all rows in current matrices of frame F as invalid. Marking
991 invalid is done by setting enabled_p to zero for all rows in a
995 clear_current_matrices (f
)
996 register struct frame
*f
;
998 /* Clear frame current matrix, if we have one. */
999 if (f
->current_matrix
)
1000 clear_glyph_matrix (f
->current_matrix
);
1002 /* Clear the matrix of the menu bar window, if such a window exists.
1003 The menu bar window is currently used to display menus on X when
1004 no toolkit support is compiled in. */
1005 if (WINDOWP (f
->menu_bar_window
))
1006 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1008 /* Clear the matrix of the tool-bar window, if any. */
1009 if (WINDOWP (f
->tool_bar_window
))
1010 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1012 /* Clear current window matrices. */
1013 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1014 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1018 /* Clear out all display lines of F for a coming redisplay. */
1021 clear_desired_matrices (f
)
1022 register struct frame
*f
;
1024 if (f
->desired_matrix
)
1025 clear_glyph_matrix (f
->desired_matrix
);
1027 if (WINDOWP (f
->menu_bar_window
))
1028 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1030 if (WINDOWP (f
->tool_bar_window
))
1031 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1033 /* Do it for window matrices. */
1034 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1035 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1039 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1040 non-zero clear desired matrices, otherwise clear current matrices. */
1043 clear_window_matrices (w
, desired_p
)
1049 if (!NILP (w
->hchild
))
1051 xassert (WINDOWP (w
->hchild
));
1052 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1054 else if (!NILP (w
->vchild
))
1056 xassert (WINDOWP (w
->vchild
));
1057 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1062 clear_glyph_matrix (w
->desired_matrix
);
1065 clear_glyph_matrix (w
->current_matrix
);
1066 w
->window_end_valid
= Qnil
;
1070 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1076 /***********************************************************************
1079 See dispextern.h for an overall explanation of glyph rows.
1080 ***********************************************************************/
1082 /* Clear glyph row ROW. Do it in a way that makes it robust against
1083 changes in the glyph_row structure, i.e. addition or removal of
1084 structure members. */
1086 static struct glyph_row null_row
;
1089 clear_glyph_row (row
)
1090 struct glyph_row
*row
;
1092 struct glyph
*p
[1 + LAST_AREA
];
1094 /* Save pointers. */
1095 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1096 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1097 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1098 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1103 /* Restore pointers. */
1104 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1105 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1106 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1107 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1109 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1110 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1111 Redisplay outputs such glyphs, and flickering effects were
1112 the result. This also depended on the contents of memory
1113 returned by xmalloc. If flickering happens again, activate
1114 the code below If the flickering is gone with that, chances
1115 are that the flickering has the same reason as here. */
1116 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1121 /* Make ROW an empty, enabled row of canonical character height,
1122 in window W starting at y-position Y. */
1125 blank_row (w
, row
, y
)
1127 struct glyph_row
*row
;
1132 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1133 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1135 clear_glyph_row (row
);
1137 row
->ascent
= row
->phys_ascent
= 0;
1138 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1141 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1142 else if (row
->y
+ row
->height
> max_y
)
1143 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1145 row
->visible_height
= row
->height
;
1151 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1152 are the amounts by which to change positions. Note that the first
1153 glyph of the text area of a row can have a buffer position even if
1154 the used count of the text area is zero. Such rows display line
1158 increment_row_positions (row
, delta
, delta_bytes
)
1159 struct glyph_row
*row
;
1160 int delta
, delta_bytes
;
1164 /* Increment start and end positions. */
1165 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1166 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1167 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1168 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1170 /* Increment positions in glyphs. */
1171 for (area
= 0; area
< LAST_AREA
; ++area
)
1172 for (i
= 0; i
< row
->used
[area
]; ++i
)
1173 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1174 && row
->glyphs
[area
][i
].charpos
> 0)
1175 row
->glyphs
[area
][i
].charpos
+= delta
;
1177 /* Capture the case of rows displaying a line end. */
1178 if (row
->used
[TEXT_AREA
] == 0
1179 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1180 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1185 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1186 contents, i.e. glyph structure contents are exchanged between A and
1187 B without changing glyph pointers in A and B. */
1190 swap_glyphs_in_rows (a
, b
)
1191 struct glyph_row
*a
, *b
;
1195 for (area
= 0; area
< LAST_AREA
; ++area
)
1197 /* Number of glyphs to swap. */
1198 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1200 /* Start of glyphs in area of row A. */
1201 struct glyph
*glyph_a
= a
->glyphs
[area
];
1203 /* End + 1 of glyphs in area of row A. */
1204 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1206 /* Start of glyphs in area of row B. */
1207 struct glyph
*glyph_b
= b
->glyphs
[area
];
1209 while (glyph_a
< glyph_a_end
)
1211 /* Non-ISO HP/UX compiler doesn't like auto struct
1215 *glyph_a
= *glyph_b
;
1225 /* Exchange pointers to glyph memory between glyph rows A and B. */
1228 swap_glyph_pointers (a
, b
)
1229 struct glyph_row
*a
, *b
;
1232 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1234 struct glyph
*temp
= a
->glyphs
[i
];
1235 a
->glyphs
[i
] = b
->glyphs
[i
];
1236 b
->glyphs
[i
] = temp
;
1241 /* Copy glyph row structure FROM to glyph row structure TO, except
1242 that glyph pointers in the structures are left unchanged. */
1245 copy_row_except_pointers (to
, from
)
1246 struct glyph_row
*to
, *from
;
1248 struct glyph
*pointers
[1 + LAST_AREA
];
1250 /* Save glyph pointers of TO. */
1251 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1253 /* Do a structure assignment. */
1256 /* Restore original pointers of TO. */
1257 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1261 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1262 TO and FROM are left unchanged. Glyph contents are copied from the
1263 glyph memory of FROM to the glyph memory of TO. Increment buffer
1264 positions in row TO by DELTA/ DELTA_BYTES. */
1267 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1268 struct glyph_row
*to
, *from
;
1269 int delta
, delta_bytes
;
1273 /* This is like a structure assignment TO = FROM, except that
1274 glyph pointers in the rows are left unchanged. */
1275 copy_row_except_pointers (to
, from
);
1277 /* Copy glyphs from FROM to TO. */
1278 for (area
= 0; area
< LAST_AREA
; ++area
)
1279 if (from
->used
[area
])
1280 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1281 from
->used
[area
] * sizeof (struct glyph
));
1283 /* Increment buffer positions in TO by DELTA. */
1284 increment_row_positions (to
, delta
, delta_bytes
);
1288 /* Assign glyph row FROM to glyph row TO. This works like a structure
1289 assignment TO = FROM, except that glyph pointers are not copied but
1290 exchanged between TO and FROM. Pointers must be exchanged to avoid
1294 assign_row (to
, from
)
1295 struct glyph_row
*to
, *from
;
1297 swap_glyph_pointers (to
, from
);
1298 copy_row_except_pointers (to
, from
);
1302 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1303 a row in a window matrix, is a slice of the glyph memory of the
1304 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1305 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1306 memory of FRAME_ROW. */
1311 glyph_row_slice_p (window_row
, frame_row
)
1312 struct glyph_row
*window_row
, *frame_row
;
1314 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1315 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1316 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1318 return (frame_glyph_start
<= window_glyph_start
1319 && window_glyph_start
< frame_glyph_end
);
1322 #endif /* GLYPH_DEBUG */
1326 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1327 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1328 in WINDOW_MATRIX is found satisfying the condition. */
1330 static struct glyph_row
*
1331 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1332 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1337 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1339 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1340 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1341 frame_matrix
->rows
+ row
))
1344 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1349 /* Prepare ROW for display. Desired rows are cleared lazily,
1350 i.e. they are only marked as to be cleared by setting their
1351 enabled_p flag to zero. When a row is to be displayed, a prior
1352 call to this function really clears it. */
1355 prepare_desired_row (row
)
1356 struct glyph_row
*row
;
1358 if (!row
->enabled_p
)
1360 clear_glyph_row (row
);
1366 /* Return a hash code for glyph row ROW. */
1369 line_hash_code (row
)
1370 struct glyph_row
*row
;
1378 /* Give all highlighted lines the same hash code
1379 so as to encourage scrolling to leave them in place. */
1384 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1385 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1389 int c
= glyph
->u
.ch
;
1390 int face_id
= glyph
->face_id
;
1391 if (must_write_spaces
)
1393 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1394 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1407 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1408 the number of characters in the line. If must_write_spaces is
1409 zero, leading and trailing spaces are ignored. */
1412 line_draw_cost (matrix
, vpos
)
1413 struct glyph_matrix
*matrix
;
1416 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1417 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1418 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1420 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1421 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1423 /* Ignore trailing and leading spaces if we can. */
1424 if (!must_write_spaces
)
1426 /* Skip from the end over trailing spaces. */
1427 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1430 /* All blank line. */
1434 /* Skip over leading spaces. */
1435 while (CHAR_GLYPH_SPACE_P (*beg
))
1439 /* If we don't have a glyph-table, each glyph is one character,
1440 so return the number of glyphs. */
1441 if (glyph_table_base
== 0)
1445 /* Otherwise, scan the glyphs and accumulate their total length
1450 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1453 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1456 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1466 /* Test two glyph rows A and B for equality. Value is non-zero if A
1467 and B have equal contents. W is the window to which the glyphs
1468 rows A and B belong. It is needed here to test for partial row
1469 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1470 flags of A and B, too. */
1473 row_equal_p (w
, a
, b
, mouse_face_p
)
1475 struct glyph_row
*a
, *b
;
1480 else if (a
->hash
!= b
->hash
)
1484 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1487 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1490 /* Compare glyphs. */
1491 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1493 if (a
->used
[area
] != b
->used
[area
])
1496 a_glyph
= a
->glyphs
[area
];
1497 a_end
= a_glyph
+ a
->used
[area
];
1498 b_glyph
= b
->glyphs
[area
];
1500 while (a_glyph
< a_end
1501 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1502 ++a_glyph
, ++b_glyph
;
1504 if (a_glyph
!= a_end
)
1508 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1509 || a
->inverse_p
!= b
->inverse_p
1510 || a
->fill_line_p
!= b
->fill_line_p
1511 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1512 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1513 || a
->continued_p
!= b
->continued_p
1514 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1515 || a
->overlapped_p
!= b
->overlapped_p
1516 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1517 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1518 /* Different partially visible characters on left margin. */
1520 /* Different height. */
1521 || a
->ascent
!= b
->ascent
1522 || a
->phys_ascent
!= b
->phys_ascent
1523 || a
->phys_height
!= b
->phys_height
1524 || a
->visible_height
!= b
->visible_height
)
1533 /***********************************************************************
1536 See dispextern.h for an overall explanation of glyph pools.
1537 ***********************************************************************/
1539 /* Allocate a glyph_pool structure. The structure returned is
1540 initialized with zeros. The global variable glyph_pool_count is
1541 incremented for each pool allocated. */
1543 static struct glyph_pool
*
1546 struct glyph_pool
*result
;
1548 /* Allocate a new glyph_pool and clear it. */
1549 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1550 bzero (result
, sizeof *result
);
1552 /* For memory leak and double deletion checking. */
1559 /* Free a glyph_pool structure POOL. The function may be called with
1560 a null POOL pointer. The global variable glyph_pool_count is
1561 decremented with every pool structure freed. If this count gets
1562 negative, more structures were freed than allocated, i.e. one
1563 structure must have been freed more than once or a bogus pointer
1564 was passed to free_glyph_pool. */
1567 free_glyph_pool (pool
)
1568 struct glyph_pool
*pool
;
1572 /* More freed than allocated? */
1574 xassert (glyph_pool_count
>= 0);
1576 xfree (pool
->glyphs
);
1582 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1583 columns we need. This function never shrinks a pool. The only
1584 case in which this would make sense, would be when a frame's size
1585 is changed from a large value to a smaller one. But, if someone
1586 does it once, we can expect that he will do it again.
1588 Value is non-zero if the pool changed in a way which makes
1589 re-adjusting window glyph matrices necessary. */
1592 realloc_glyph_pool (pool
, matrix_dim
)
1593 struct glyph_pool
*pool
;
1594 struct dim matrix_dim
;
1599 changed_p
= (pool
->glyphs
== 0
1600 || matrix_dim
.height
!= pool
->nrows
1601 || matrix_dim
.width
!= pool
->ncolumns
);
1603 /* Enlarge the glyph pool. */
1604 needed
= matrix_dim
.width
* matrix_dim
.height
;
1605 if (needed
> pool
->nglyphs
)
1607 int size
= needed
* sizeof (struct glyph
);
1610 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1613 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1614 bzero (pool
->glyphs
, size
);
1617 pool
->nglyphs
= needed
;
1620 /* Remember the number of rows and columns because (a) we use then
1621 to do sanity checks, and (b) the number of columns determines
1622 where rows in the frame matrix start---this must be available to
1623 determine pointers to rows of window sub-matrices. */
1624 pool
->nrows
= matrix_dim
.height
;
1625 pool
->ncolumns
= matrix_dim
.width
;
1632 /***********************************************************************
1634 ***********************************************************************/
1639 /* Flush standard output. This is sometimes useful to call from
1649 /* Check that no glyph pointers have been lost in MATRIX. If a
1650 pointer has been lost, e.g. by using a structure assignment between
1651 rows, at least one pointer must occur more than once in the rows of
1655 check_matrix_pointer_lossage (matrix
)
1656 struct glyph_matrix
*matrix
;
1660 for (i
= 0; i
< matrix
->nrows
; ++i
)
1661 for (j
= 0; j
< matrix
->nrows
; ++j
)
1663 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1664 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1668 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1671 matrix_row (matrix
, row
)
1672 struct glyph_matrix
*matrix
;
1675 xassert (matrix
&& matrix
->rows
);
1676 xassert (row
>= 0 && row
< matrix
->nrows
);
1678 /* That's really too slow for normal testing because this function
1679 is called almost everywhere. Although---it's still astonishingly
1680 fast, so it is valuable to have for debugging purposes. */
1682 check_matrix_pointer_lossage (matrix
);
1685 return matrix
->rows
+ row
;
1689 #if 0 /* This function makes invalid assumptions when text is
1690 partially invisible. But it might come handy for debugging
1693 /* Check invariants that must hold for an up to date current matrix of
1697 check_matrix_invariants (w
)
1700 struct glyph_matrix
*matrix
= w
->current_matrix
;
1701 int yb
= window_text_bottom_y (w
);
1702 struct glyph_row
*row
= matrix
->rows
;
1703 struct glyph_row
*last_text_row
= NULL
;
1704 struct buffer
*saved
= current_buffer
;
1705 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1708 /* This can sometimes happen for a fresh window. */
1709 if (matrix
->nrows
< 2)
1712 set_buffer_temp (buffer
);
1714 /* Note: last row is always reserved for the mode line. */
1715 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1716 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1718 struct glyph_row
*next
= row
+ 1;
1720 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1721 last_text_row
= row
;
1723 /* Check that character and byte positions are in sync. */
1724 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1725 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1727 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1728 have such a position temporarily in case of a minibuffer
1729 displaying something like `[Sole completion]' at its end. */
1730 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1731 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1732 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1734 /* Check that end position of `row' is equal to start position
1736 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1738 xassert (MATRIX_ROW_END_CHARPOS (row
)
1739 == MATRIX_ROW_START_CHARPOS (next
));
1740 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1741 == MATRIX_ROW_START_BYTEPOS (next
));
1746 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1747 xassert (w
->desired_matrix
->rows
!= NULL
);
1748 set_buffer_temp (saved
);
1753 #endif /* GLYPH_DEBUG != 0 */
1757 /**********************************************************************
1758 Allocating/ Adjusting Glyph Matrices
1759 **********************************************************************/
1761 /* Allocate glyph matrices over a window tree for a frame-based
1764 X and Y are column/row within the frame glyph matrix where
1765 sub-matrices for the window tree rooted at WINDOW must be
1766 allocated. CH_DIM contains the dimensions of the smallest
1767 character that could be used during display. DIM_ONLY_P non-zero
1768 means that the caller of this function is only interested in the
1769 result matrix dimension, and matrix adjustments should not be
1772 The function returns the total width/height of the sub-matrices of
1773 the window tree. If called on a frame root window, the computation
1774 will take the mini-buffer window into account.
1776 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1778 NEW_LEAF_MATRIX set if any window in the tree did not have a
1779 glyph matrices yet, and
1781 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1782 any window in the tree will be changed or have been changed (see
1785 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1788 Windows are arranged into chains of windows on the same level
1789 through the next fields of window structures. Such a level can be
1790 either a sequence of horizontally adjacent windows from left to
1791 right, or a sequence of vertically adjacent windows from top to
1792 bottom. Each window in a horizontal sequence can be either a leaf
1793 window or a vertical sequence; a window in a vertical sequence can
1794 be either a leaf or a horizontal sequence. All windows in a
1795 horizontal sequence have the same height, and all windows in a
1796 vertical sequence have the same width.
1798 This function uses, for historical reasons, a more general
1799 algorithm to determine glyph matrix dimensions that would be
1802 The matrix height of a horizontal sequence is determined by the
1803 maximum height of any matrix in the sequence. The matrix width of
1804 a horizontal sequence is computed by adding up matrix widths of
1805 windows in the sequence.
1807 |<------- result width ------->|
1808 +---------+----------+---------+ ---
1811 +---------+ | | result height
1816 The matrix width of a vertical sequence is the maximum matrix width
1817 of any window in the sequence. Its height is computed by adding up
1818 matrix heights of windows in the sequence.
1820 |<---- result width -->|
1828 +------------+---------+ |
1831 +------------+---------+ --- */
1833 /* Bit indicating that a new matrix will be allocated or has been
1836 #define NEW_LEAF_MATRIX (1 << 0)
1838 /* Bit indicating that a matrix will or has changed its location or
1841 #define CHANGED_LEAF_MATRIX (1 << 1)
1844 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1845 dim_only_p
, window_change_flags
)
1850 int *window_change_flags
;
1852 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1854 int wmax
= 0, hmax
= 0;
1858 int in_horz_combination_p
;
1860 /* What combination is WINDOW part of? Compute this once since the
1861 result is the same for all windows in the `next' chain. The
1862 special case of a root window (parent equal to nil) is treated
1863 like a vertical combination because a root window's `next'
1864 points to the mini-buffer window, if any, which is arranged
1865 vertically below other windows. */
1866 in_horz_combination_p
1867 = (!NILP (XWINDOW (window
)->parent
)
1868 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1870 /* For WINDOW and all windows on the same level. */
1873 w
= XWINDOW (window
);
1875 /* Get the dimension of the window sub-matrix for W, depending
1876 on whether this a combination or a leaf window. */
1877 if (!NILP (w
->hchild
))
1878 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1880 window_change_flags
);
1881 else if (!NILP (w
->vchild
))
1882 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1884 window_change_flags
);
1887 /* If not already done, allocate sub-matrix structures. */
1888 if (w
->desired_matrix
== NULL
)
1890 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1891 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1892 *window_change_flags
|= NEW_LEAF_MATRIX
;
1895 /* Width and height MUST be chosen so that there are no
1896 holes in the frame matrix. */
1897 dim
.width
= XINT (w
->width
);
1898 dim
.height
= XINT (w
->height
);
1900 /* Will matrix be re-allocated? */
1901 if (x
!= w
->desired_matrix
->matrix_x
1902 || y
!= w
->desired_matrix
->matrix_y
1903 || dim
.width
!= w
->desired_matrix
->matrix_w
1904 || dim
.height
!= w
->desired_matrix
->matrix_h
1905 || (margin_glyphs_to_reserve (w
, dim
.width
,
1906 w
->right_margin_width
)
1907 != w
->desired_matrix
->left_margin_glyphs
)
1908 || (margin_glyphs_to_reserve (w
, dim
.width
,
1909 w
->left_margin_width
)
1910 != w
->desired_matrix
->right_margin_glyphs
))
1911 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1913 /* Actually change matrices, if allowed. Do not consider
1914 CHANGED_LEAF_MATRIX computed above here because the pool
1915 may have been changed which we don't now here. We trust
1916 that we only will be called with DIM_ONLY_P != 0 when
1920 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1921 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1925 /* If we are part of a horizontal combination, advance x for
1926 windows to the right of W; otherwise advance y for windows
1928 if (in_horz_combination_p
)
1933 /* Remember maximum glyph matrix dimensions. */
1934 wmax
= max (wmax
, dim
.width
);
1935 hmax
= max (hmax
, dim
.height
);
1937 /* Next window on same level. */
1940 while (!NILP (window
));
1942 /* Set `total' to the total glyph matrix dimension of this window
1943 level. In a vertical combination, the width is the width of the
1944 widest window; the height is the y we finally reached, corrected
1945 by the y we started with. In a horizontal combination, the total
1946 height is the height of the tallest window, and the width is the
1947 x we finally reached, corrected by the x we started with. */
1948 if (in_horz_combination_p
)
1950 total
.width
= x
- x0
;
1951 total
.height
= hmax
;
1956 total
.height
= y
- y0
;
1963 /* Allocate window matrices for window-based redisplay. W is the
1964 window whose matrices must be allocated/reallocated. CH_DIM is the
1965 size of the smallest character that could potentially be used on W. */
1968 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1972 struct frame
*f
= XFRAME (w
->frame
);
1976 if (!NILP (w
->vchild
))
1977 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1978 else if (!NILP (w
->hchild
))
1979 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1982 /* W is a leaf window. */
1983 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
1984 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1987 /* If matrices are not yet allocated, allocate them now. */
1988 if (w
->desired_matrix
== NULL
)
1990 w
->desired_matrix
= new_glyph_matrix (NULL
);
1991 w
->current_matrix
= new_glyph_matrix (NULL
);
1994 /* Compute number of glyphs needed in a glyph row. */
1995 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
1997 /* 2 partially visible columns in the text area. */
1999 /* One partially visible column at the right
2000 edge of each marginal area. */
2003 /* Compute number of glyph rows needed. */
2004 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
2006 /* One partially visible line at the top and
2007 bottom of the window. */
2009 /* 2 for top and mode line. */
2012 /* Change matrices. */
2013 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2014 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2017 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2022 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2023 do it for all frames; otherwise do it just for the given frame.
2024 This function must be called when a new frame is created, its size
2025 changes, or its window configuration changes. */
2031 /* Block input so that expose events and other events that access
2032 glyph matrices are not processed while we are changing them. */
2036 adjust_frame_glyphs (f
);
2039 Lisp_Object tail
, lisp_frame
;
2041 FOR_EACH_FRAME (tail
, lisp_frame
)
2042 adjust_frame_glyphs (XFRAME (lisp_frame
));
2049 /* Adjust frame glyphs when Emacs is initialized.
2051 To be called from init_display.
2053 We need a glyph matrix because redraw will happen soon.
2054 Unfortunately, window sizes on selected_frame are not yet set to
2055 meaningful values. I believe we can assume that there are only two
2056 windows on the frame---the mini-buffer and the root window. Frame
2057 height and width seem to be correct so far. So, set the sizes of
2058 windows to estimated values. */
2061 adjust_frame_glyphs_initially ()
2063 struct frame
*sf
= SELECTED_FRAME ();
2064 struct window
*root
= XWINDOW (sf
->root_window
);
2065 struct window
*mini
= XWINDOW (root
->next
);
2066 int frame_height
= FRAME_HEIGHT (sf
);
2067 int frame_width
= FRAME_WIDTH (sf
);
2068 int top_margin
= FRAME_TOP_MARGIN (sf
);
2070 /* Do it for the root window. */
2071 XSETFASTINT (root
->top
, top_margin
);
2072 XSETFASTINT (root
->width
, frame_width
);
2073 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2075 /* Do it for the mini-buffer window. */
2076 XSETFASTINT (mini
->top
, frame_height
- 1);
2077 XSETFASTINT (mini
->width
, frame_width
);
2078 set_window_height (root
->next
, 1, 0);
2080 adjust_frame_glyphs (sf
);
2081 glyphs_initialized_initially_p
= 1;
2085 /* Allocate/reallocate glyph matrices of a single frame F. */
2088 adjust_frame_glyphs (f
)
2091 if (FRAME_WINDOW_P (f
))
2092 adjust_frame_glyphs_for_window_redisplay (f
);
2094 adjust_frame_glyphs_for_frame_redisplay (f
);
2096 /* Don't forget the message buffer and the buffer for
2097 decode_mode_spec. */
2098 adjust_frame_message_buffer (f
);
2099 adjust_decode_mode_spec_buffer (f
);
2101 f
->glyphs_initialized_p
= 1;
2105 /* In the window tree with root W, build current matrices of leaf
2106 windows from the frame's current matrix. */
2109 fake_current_matrices (window
)
2114 for (; !NILP (window
); window
= w
->next
)
2116 w
= XWINDOW (window
);
2118 if (!NILP (w
->hchild
))
2119 fake_current_matrices (w
->hchild
);
2120 else if (!NILP (w
->vchild
))
2121 fake_current_matrices (w
->vchild
);
2125 struct frame
*f
= XFRAME (w
->frame
);
2126 struct glyph_matrix
*m
= w
->current_matrix
;
2127 struct glyph_matrix
*fm
= f
->current_matrix
;
2129 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2130 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2132 for (i
= 0; i
< m
->matrix_h
; ++i
)
2134 struct glyph_row
*r
= m
->rows
+ i
;
2135 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2137 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2138 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2140 r
->enabled_p
= fr
->enabled_p
;
2143 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2144 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2145 r
->used
[TEXT_AREA
] = (m
->matrix_w
2146 - r
->used
[LEFT_MARGIN_AREA
]
2147 - r
->used
[RIGHT_MARGIN_AREA
]);
2149 r
->inverse_p
= fr
->inverse_p
;
2157 /* Save away the contents of frame F's current frame matrix. Value is
2158 a glyph matrix holding the contents of F's current frame matrix. '*/
2160 static struct glyph_matrix
*
2161 save_current_matrix (f
)
2165 struct glyph_matrix
*saved
;
2167 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2168 bzero (saved
, sizeof *saved
);
2169 saved
->nrows
= f
->current_matrix
->nrows
;
2170 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2171 * sizeof *saved
->rows
);
2172 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2174 for (i
= 0; i
< saved
->nrows
; ++i
)
2176 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2177 struct glyph_row
*to
= saved
->rows
+ i
;
2178 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2179 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2180 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2181 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2188 /* Restore the contents of frame F's current frame matrix from SAVED,
2189 and free memory associated with SAVED. */
2192 restore_current_matrix (f
, saved
)
2194 struct glyph_matrix
*saved
;
2198 for (i
= 0; i
< saved
->nrows
; ++i
)
2200 struct glyph_row
*from
= saved
->rows
+ i
;
2201 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2202 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2203 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2204 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2205 xfree (from
->glyphs
[TEXT_AREA
]);
2208 xfree (saved
->rows
);
2214 /* Allocate/reallocate glyph matrices of a single frame F for
2215 frame-based redisplay. */
2218 adjust_frame_glyphs_for_frame_redisplay (f
)
2222 struct dim matrix_dim
;
2224 int window_change_flags
;
2227 if (!FRAME_LIVE_P (f
))
2230 /* Determine the smallest character in any font for F. On
2231 console windows, all characters have dimension (1, 1). */
2232 ch_dim
.width
= ch_dim
.height
= 1;
2234 top_window_y
= FRAME_TOP_MARGIN (f
);
2236 /* Allocate glyph pool structures if not already done. */
2237 if (f
->desired_pool
== NULL
)
2239 f
->desired_pool
= new_glyph_pool ();
2240 f
->current_pool
= new_glyph_pool ();
2243 /* Allocate frames matrix structures if needed. */
2244 if (f
->desired_matrix
== NULL
)
2246 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2247 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2250 /* Compute window glyph matrices. (This takes the mini-buffer
2251 window into account). The result is the size of the frame glyph
2252 matrix needed. The variable window_change_flags is set to a bit
2253 mask indicating whether new matrices will be allocated or
2254 existing matrices change their size or location within the frame
2256 window_change_flags
= 0;
2258 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2261 &window_change_flags
);
2263 /* Add in menu bar lines, if any. */
2264 matrix_dim
.height
+= top_window_y
;
2266 /* Enlarge pools as necessary. */
2267 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2268 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2270 /* Set up glyph pointers within window matrices. Do this only if
2271 absolutely necessary since it requires a frame redraw. */
2272 if (pool_changed_p
|| window_change_flags
)
2274 /* Do it for window matrices. */
2275 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2276 0, top_window_y
, ch_dim
, 0,
2277 &window_change_flags
);
2279 /* Size of frame matrices must equal size of frame. Note
2280 that we are called for X frames with window widths NOT equal
2281 to the frame width (from CHANGE_FRAME_SIZE_1). */
2282 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2283 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2285 /* Pointers to glyph memory in glyph rows are exchanged during
2286 the update phase of redisplay, which means in general that a
2287 frame's current matrix consists of pointers into both the
2288 desired and current glyph pool of the frame. Adjusting a
2289 matrix sets the frame matrix up so that pointers are all into
2290 the same pool. If we want to preserve glyph contents of the
2291 current matrix over a call to adjust_glyph_matrix, we must
2292 make a copy of the current glyphs, and restore the current
2293 matrix' contents from that copy. */
2294 if (display_completed
2295 && !FRAME_GARBAGED_P (f
)
2296 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2297 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2299 struct glyph_matrix
*copy
= save_current_matrix (f
);
2300 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2301 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2302 restore_current_matrix (f
, copy
);
2303 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2307 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2308 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2309 SET_FRAME_GARBAGED (f
);
2315 /* Allocate/reallocate glyph matrices of a single frame F for
2316 window-based redisplay. */
2319 adjust_frame_glyphs_for_window_redisplay (f
)
2325 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2327 /* Get minimum sizes. */
2328 #ifdef HAVE_WINDOW_SYSTEM
2329 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2330 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2332 ch_dim
.width
= ch_dim
.height
= 1;
2335 /* Allocate/reallocate window matrices. */
2336 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2339 /* Allocate/ reallocate matrices of the dummy window used to display
2340 the menu bar under X when no X toolkit support is available. */
2341 #ifndef USE_X_TOOLKIT
2343 /* Allocate a dummy window if not already done. */
2344 if (NILP (f
->menu_bar_window
))
2346 f
->menu_bar_window
= make_window ();
2347 w
= XWINDOW (f
->menu_bar_window
);
2348 XSETFRAME (w
->frame
, f
);
2349 w
->pseudo_window_p
= 1;
2352 w
= XWINDOW (f
->menu_bar_window
);
2354 /* Set window dimensions to frame dimensions and allocate or
2355 adjust glyph matrices of W. */
2356 XSETFASTINT (w
->top
, 0);
2357 XSETFASTINT (w
->left
, 0);
2358 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2359 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2360 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2362 #endif /* not USE_X_TOOLKIT */
2364 /* Allocate/ reallocate matrices of the tool bar window. If we
2365 don't have a tool bar window yet, make one. */
2366 if (NILP (f
->tool_bar_window
))
2368 f
->tool_bar_window
= make_window ();
2369 w
= XWINDOW (f
->tool_bar_window
);
2370 XSETFRAME (w
->frame
, f
);
2371 w
->pseudo_window_p
= 1;
2374 w
= XWINDOW (f
->tool_bar_window
);
2376 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2377 XSETFASTINT (w
->left
, 0);
2378 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2379 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2380 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2384 /* Adjust/ allocate message buffer of frame F.
2386 Note that the message buffer is never freed. Since I could not
2387 find a free in 19.34, I assume that freeing it would be
2388 problematic in some way and don't do it either.
2390 (Implementation note: It should be checked if we can free it
2391 eventually without causing trouble). */
2394 adjust_frame_message_buffer (f
)
2397 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2399 if (FRAME_MESSAGE_BUF (f
))
2401 char *buffer
= FRAME_MESSAGE_BUF (f
);
2402 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2403 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2406 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2410 /* Re-allocate buffer for decode_mode_spec on frame F. */
2413 adjust_decode_mode_spec_buffer (f
)
2416 f
->decode_mode_spec_buffer
2417 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2418 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2423 /**********************************************************************
2424 Freeing Glyph Matrices
2425 **********************************************************************/
2427 /* Free glyph memory for a frame F. F may be null. This function can
2428 be called for the same frame more than once. The root window of
2429 F may be nil when this function is called. This is the case when
2430 the function is called when F is destroyed. */
2436 if (f
&& f
->glyphs_initialized_p
)
2438 /* Block interrupt input so that we don't get surprised by an X
2439 event while we're in an inconsistent state. */
2441 f
->glyphs_initialized_p
= 0;
2443 /* Release window sub-matrices. */
2444 if (!NILP (f
->root_window
))
2445 free_window_matrices (XWINDOW (f
->root_window
));
2447 /* Free the dummy window for menu bars without X toolkit and its
2449 if (!NILP (f
->menu_bar_window
))
2451 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2452 free_glyph_matrix (w
->desired_matrix
);
2453 free_glyph_matrix (w
->current_matrix
);
2454 w
->desired_matrix
= w
->current_matrix
= NULL
;
2455 f
->menu_bar_window
= Qnil
;
2458 /* Free the tool bar window and its glyph matrices. */
2459 if (!NILP (f
->tool_bar_window
))
2461 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2462 free_glyph_matrix (w
->desired_matrix
);
2463 free_glyph_matrix (w
->current_matrix
);
2464 w
->desired_matrix
= w
->current_matrix
= NULL
;
2465 f
->tool_bar_window
= Qnil
;
2468 /* Release frame glyph matrices. Reset fields to zero in
2469 case we are called a second time. */
2470 if (f
->desired_matrix
)
2472 free_glyph_matrix (f
->desired_matrix
);
2473 free_glyph_matrix (f
->current_matrix
);
2474 f
->desired_matrix
= f
->current_matrix
= NULL
;
2477 /* Release glyph pools. */
2478 if (f
->desired_pool
)
2480 free_glyph_pool (f
->desired_pool
);
2481 free_glyph_pool (f
->current_pool
);
2482 f
->desired_pool
= f
->current_pool
= NULL
;
2490 /* Free glyph sub-matrices in the window tree rooted at W. This
2491 function may be called with a null pointer, and it may be called on
2492 the same tree more than once. */
2495 free_window_matrices (w
)
2500 if (!NILP (w
->hchild
))
2501 free_window_matrices (XWINDOW (w
->hchild
));
2502 else if (!NILP (w
->vchild
))
2503 free_window_matrices (XWINDOW (w
->vchild
));
2506 /* This is a leaf window. Free its memory and reset fields
2507 to zero in case this function is called a second time for
2509 free_glyph_matrix (w
->current_matrix
);
2510 free_glyph_matrix (w
->desired_matrix
);
2511 w
->current_matrix
= w
->desired_matrix
= NULL
;
2514 /* Next window on same level. */
2515 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2520 /* Check glyph memory leaks. This function is called from
2521 shut_down_emacs. Note that frames are not destroyed when Emacs
2522 exits. We therefore free all glyph memory for all active frames
2523 explicitly and check that nothing is left allocated. */
2526 check_glyph_memory ()
2528 Lisp_Object tail
, frame
;
2530 /* Free glyph memory for all frames. */
2531 FOR_EACH_FRAME (tail
, frame
)
2532 free_glyphs (XFRAME (frame
));
2534 /* Check that nothing is left allocated. */
2535 if (glyph_matrix_count
)
2537 if (glyph_pool_count
)
2543 /**********************************************************************
2544 Building a Frame Matrix
2545 **********************************************************************/
2547 /* Most of the redisplay code works on glyph matrices attached to
2548 windows. This is a good solution most of the time, but it is not
2549 suitable for terminal code. Terminal output functions cannot rely
2550 on being able to set an arbitrary terminal window. Instead they
2551 must be provided with a view of the whole frame, i.e. the whole
2552 screen. We build such a view by constructing a frame matrix from
2553 window matrices in this section.
2555 Windows that must be updated have their must_be_update_p flag set.
2556 For all such windows, their desired matrix is made part of the
2557 desired frame matrix. For other windows, their current matrix is
2558 made part of the desired frame matrix.
2560 +-----------------+----------------+
2561 | desired | desired |
2563 +-----------------+----------------+
2566 +----------------------------------+
2568 Desired window matrices can be made part of the frame matrix in a
2569 cheap way: We exploit the fact that the desired frame matrix and
2570 desired window matrices share their glyph memory. This is not
2571 possible for current window matrices. Their glyphs are copied to
2572 the desired frame matrix. The latter is equivalent to
2573 preserve_other_columns in the old redisplay.
2575 Used glyphs counters for frame matrix rows are the result of adding
2576 up glyph lengths of the window matrices. A line in the frame
2577 matrix is enabled, if a corresponding line in a window matrix is
2580 After building the desired frame matrix, it will be passed to
2581 terminal code, which will manipulate both the desired and current
2582 frame matrix. Changes applied to the frame's current matrix have
2583 to be visible in current window matrices afterwards, of course.
2585 This problem is solved like this:
2587 1. Window and frame matrices share glyphs. Window matrices are
2588 constructed in a way that their glyph contents ARE the glyph
2589 contents needed in a frame matrix. Thus, any modification of
2590 glyphs done in terminal code will be reflected in window matrices
2593 2. Exchanges of rows in a frame matrix done by terminal code are
2594 intercepted by hook functions so that corresponding row operations
2595 on window matrices can be performed. This is necessary because we
2596 use pointers to glyphs in glyph row structures. To satisfy the
2597 assumption of point 1 above that glyphs are updated implicitly in
2598 window matrices when they are manipulated via the frame matrix,
2599 window and frame matrix must of course agree where to find the
2600 glyphs for their rows. Possible manipulations that must be
2601 mirrored are assignments of rows of the desired frame matrix to the
2602 current frame matrix and scrolling the current frame matrix. */
2604 /* Build frame F's desired matrix from window matrices. Only windows
2605 which have the flag must_be_updated_p set have to be updated. Menu
2606 bar lines of a frame are not covered by window matrices, so make
2607 sure not to touch them in this function. */
2610 build_frame_matrix (f
)
2615 /* F must have a frame matrix when this function is called. */
2616 xassert (!FRAME_WINDOW_P (f
));
2618 /* Clear all rows in the frame matrix covered by window matrices.
2619 Menu bar lines are not covered by windows. */
2620 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2621 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2623 /* Build the matrix by walking the window tree. */
2624 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2625 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2629 /* Walk a window tree, building a frame matrix MATRIX from window
2630 matrices. W is the root of a window tree. */
2633 build_frame_matrix_from_window_tree (matrix
, w
)
2634 struct glyph_matrix
*matrix
;
2639 if (!NILP (w
->hchild
))
2640 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2641 else if (!NILP (w
->vchild
))
2642 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2644 build_frame_matrix_from_leaf_window (matrix
, w
);
2646 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2651 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2652 desired frame matrix built. W is a leaf window whose desired or
2653 current matrix is to be added to FRAME_MATRIX. W's flag
2654 must_be_updated_p determines which matrix it contributes to
2655 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2656 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2657 Adding a desired matrix means setting up used counters and such in
2658 frame rows, while adding a current window matrix to FRAME_MATRIX
2659 means copying glyphs. The latter case corresponds to
2660 preserve_other_columns in the old redisplay. */
2663 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2664 struct glyph_matrix
*frame_matrix
;
2667 struct glyph_matrix
*window_matrix
;
2668 int window_y
, frame_y
;
2669 /* If non-zero, a glyph to insert at the right border of W. */
2670 GLYPH right_border_glyph
= 0;
2672 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2673 if (w
->must_be_updated_p
)
2675 window_matrix
= w
->desired_matrix
;
2677 /* Decide whether we want to add a vertical border glyph. */
2678 if (!WINDOW_RIGHTMOST_P (w
))
2680 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2681 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2682 ? XINT (DISP_BORDER_GLYPH (dp
))
2687 window_matrix
= w
->current_matrix
;
2689 /* For all rows in the window matrix and corresponding rows in the
2692 frame_y
= window_matrix
->matrix_y
;
2693 while (window_y
< window_matrix
->nrows
)
2695 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2696 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2697 int current_row_p
= window_matrix
== w
->current_matrix
;
2699 /* Fill up the frame row with spaces up to the left margin of the
2701 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2703 /* Fill up areas in the window matrix row with spaces. */
2704 fill_up_glyph_row_with_spaces (window_row
);
2706 /* If only part of W's desired matrix has been built, and
2707 window_row wasn't displayed, use the corresponding current
2709 if (window_matrix
== w
->desired_matrix
2710 && !window_row
->enabled_p
)
2712 window_row
= w
->current_matrix
->rows
+ window_y
;
2718 /* Copy window row to frame row. */
2719 bcopy (window_row
->glyphs
[0],
2720 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2721 window_matrix
->matrix_w
* sizeof (struct glyph
));
2725 xassert (window_row
->enabled_p
);
2727 /* Only when a desired row has been displayed, we want
2728 the corresponding frame row to be updated. */
2729 frame_row
->enabled_p
= 1;
2731 /* Maybe insert a vertical border between horizontally adjacent
2733 if (right_border_glyph
)
2735 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2736 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2739 /* Window row window_y must be a slice of frame row
2741 xassert (glyph_row_slice_p (window_row
, frame_row
));
2743 /* If rows are in sync, we don't have to copy glyphs because
2744 frame and window share glyphs. */
2747 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2748 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2752 /* Set number of used glyphs in the frame matrix. Since we fill
2753 up with spaces, and visit leaf windows from left to right it
2754 can be done simply. */
2755 frame_row
->used
[TEXT_AREA
]
2756 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2758 /* Or in other flags. */
2759 frame_row
->inverse_p
|= window_row
->inverse_p
;
2768 /* Add spaces to a glyph row ROW in a window matrix.
2770 Each row has the form:
2772 +---------+-----------------------------+------------+
2773 | left | text | right |
2774 +---------+-----------------------------+------------+
2776 Left and right marginal areas are optional. This function adds
2777 spaces to areas so that there are no empty holes between areas.
2778 In other words: If the right area is not empty, the text area
2779 is filled up with spaces up to the right area. If the text area
2780 is not empty, the left area is filled up.
2782 To be called for frame-based redisplay, only. */
2785 fill_up_glyph_row_with_spaces (row
)
2786 struct glyph_row
*row
;
2788 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2789 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2790 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2794 /* Fill area AREA of glyph row ROW with spaces. To be called for
2795 frame-based redisplay only. */
2798 fill_up_glyph_row_area_with_spaces (row
, area
)
2799 struct glyph_row
*row
;
2802 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2804 struct glyph
*end
= row
->glyphs
[area
+ 1];
2805 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2808 *text
++ = space_glyph
;
2809 row
->used
[area
] = text
- row
->glyphs
[area
];
2814 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2815 reached. In frame matrices only one area, TEXT_AREA, is used. */
2818 fill_up_frame_row_with_spaces (row
, upto
)
2819 struct glyph_row
*row
;
2822 int i
= row
->used
[TEXT_AREA
];
2823 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2826 glyph
[i
++] = space_glyph
;
2828 row
->used
[TEXT_AREA
] = i
;
2833 /**********************************************************************
2834 Mirroring operations on frame matrices in window matrices
2835 **********************************************************************/
2837 /* Set frame being updated via frame-based redisplay to F. This
2838 function must be called before updates to make explicit that we are
2839 working on frame matrices or not. */
2842 set_frame_matrix_frame (f
)
2845 frame_matrix_frame
= f
;
2849 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2850 DESIRED_MATRIX is the desired matrix corresponding to
2851 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2852 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2853 frame_matrix_frame is non-null, this indicates that the exchange is
2854 done in frame matrices, and that we have to perform analogous
2855 operations in window matrices of frame_matrix_frame. */
2858 make_current (desired_matrix
, current_matrix
, row
)
2859 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2862 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2863 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2864 int mouse_face_p
= current_row
->mouse_face_p
;
2866 /* Do current_row = desired_row. This exchanges glyph pointers
2867 between both rows, and does a structure assignment otherwise. */
2868 assign_row (current_row
, desired_row
);
2870 /* Enable current_row to mark it as valid. */
2871 current_row
->enabled_p
= 1;
2872 current_row
->mouse_face_p
= mouse_face_p
;
2874 /* If we are called on frame matrices, perform analogous operations
2875 for window matrices. */
2876 if (frame_matrix_frame
)
2877 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2881 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2882 W's frame which has been made current (by swapping pointers between
2883 current and desired matrix). Perform analogous operations in the
2884 matrices of leaf windows in the window tree rooted at W. */
2887 mirror_make_current (w
, frame_row
)
2893 if (!NILP (w
->hchild
))
2894 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2895 else if (!NILP (w
->vchild
))
2896 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2899 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2900 here because the checks performed in debug mode there
2901 will not allow the conversion. */
2902 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2904 /* If FRAME_ROW is within W, assign the desired row to the
2905 current row (exchanging glyph pointers). */
2906 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2908 struct glyph_row
*current_row
2909 = MATRIX_ROW (w
->current_matrix
, row
);
2910 struct glyph_row
*desired_row
2911 = MATRIX_ROW (w
->desired_matrix
, row
);
2913 if (desired_row
->enabled_p
)
2914 assign_row (current_row
, desired_row
);
2916 swap_glyph_pointers (desired_row
, current_row
);
2917 current_row
->enabled_p
= 1;
2921 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2926 /* Perform row dance after scrolling. We are working on the range of
2927 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2928 including) in MATRIX. COPY_FROM is a vector containing, for each
2929 row I in the range 0 <= I < NLINES, the index of the original line
2930 to move to I. This index is relative to the row range, i.e. 0 <=
2931 index < NLINES. RETAINED_P is a vector containing zero for each
2932 row 0 <= I < NLINES which is empty.
2934 This function is called from do_scrolling and do_direct_scrolling. */
2937 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2939 struct glyph_matrix
*matrix
;
2940 int unchanged_at_top
, nlines
;
2944 /* A copy of original rows. */
2945 struct glyph_row
*old_rows
;
2947 /* Rows to assign to. */
2948 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2952 /* Make a copy of the original rows. */
2953 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2954 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2956 /* Assign new rows, maybe clear lines. */
2957 for (i
= 0; i
< nlines
; ++i
)
2959 int enabled_before_p
= new_rows
[i
].enabled_p
;
2961 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2962 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2963 new_rows
[i
] = old_rows
[copy_from
[i
]];
2964 new_rows
[i
].enabled_p
= enabled_before_p
;
2966 /* RETAINED_P is zero for empty lines. */
2967 if (!retained_p
[copy_from
[i
]])
2968 new_rows
[i
].enabled_p
= 0;
2971 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2972 if (frame_matrix_frame
)
2973 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2974 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2978 /* Synchronize glyph pointers in the current matrix of window W with
2979 the current frame matrix. W must be full-width, and be on a tty
2983 sync_window_with_frame_matrix_rows (w
)
2986 struct frame
*f
= XFRAME (w
->frame
);
2987 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2989 /* Preconditions: W must be a leaf window and full-width. Its frame
2990 must have a frame matrix. */
2991 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2992 xassert (WINDOW_FULL_WIDTH_P (w
));
2993 xassert (!FRAME_WINDOW_P (f
));
2995 /* If W is a full-width window, glyph pointers in W's current matrix
2996 have, by definition, to be the same as glyph pointers in the
2997 corresponding frame matrix. */
2998 window_row
= w
->current_matrix
->rows
;
2999 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3000 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
3001 while (window_row
< window_row_end
)
3005 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
3006 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
3008 ++window_row
, ++frame_row
;
3013 /* Return the window in the window tree rooted in W containing frame
3014 row ROW. Value is null if none is found. */
3017 frame_row_to_window (w
, row
)
3021 struct window
*found
= NULL
;
3025 if (!NILP (w
->hchild
))
3026 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3027 else if (!NILP (w
->vchild
))
3028 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3029 else if (row
>= XFASTINT (w
->top
)
3030 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3033 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3040 /* Perform a line dance in the window tree rooted at W, after
3041 scrolling a frame matrix in mirrored_line_dance.
3043 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3044 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3045 COPY_FROM is a vector containing, for each row I in the range 0 <=
3046 I < NLINES, the index of the original line to move to I. This
3047 index is relative to the row range, i.e. 0 <= index < NLINES.
3048 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3052 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3054 int unchanged_at_top
, nlines
;
3060 if (!NILP (w
->hchild
))
3061 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3062 nlines
, copy_from
, retained_p
);
3063 else if (!NILP (w
->vchild
))
3064 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3065 nlines
, copy_from
, retained_p
);
3068 /* W is a leaf window, and we are working on its current
3070 struct glyph_matrix
*m
= w
->current_matrix
;
3072 struct glyph_row
*old_rows
;
3074 /* Make a copy of the original rows of matrix m. */
3075 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3076 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3078 for (i
= 0; i
< nlines
; ++i
)
3080 /* Frame relative line assigned to. */
3081 int frame_to
= i
+ unchanged_at_top
;
3083 /* Frame relative line assigned. */
3084 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3086 /* Window relative line assigned to. */
3087 int window_to
= frame_to
- m
->matrix_y
;
3089 /* Window relative line assigned. */
3090 int window_from
= frame_from
- m
->matrix_y
;
3092 /* Is assigned line inside window? */
3093 int from_inside_window_p
3094 = window_from
>= 0 && window_from
< m
->matrix_h
;
3096 /* Is assigned to line inside window? */
3097 int to_inside_window_p
3098 = window_to
>= 0 && window_to
< m
->matrix_h
;
3100 if (from_inside_window_p
&& to_inside_window_p
)
3102 /* Enabled setting before assignment. */
3103 int enabled_before_p
;
3105 /* Do the assignment. The enabled_p flag is saved
3106 over the assignment because the old redisplay did
3108 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3109 m
->rows
[window_to
] = old_rows
[window_from
];
3110 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3112 /* If frame line is empty, window line is empty, too. */
3113 if (!retained_p
[copy_from
[i
]])
3114 m
->rows
[window_to
].enabled_p
= 0;
3116 else if (to_inside_window_p
)
3118 /* A copy between windows. This is an infrequent
3119 case not worth optimizing. */
3120 struct frame
*f
= XFRAME (w
->frame
);
3121 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3123 struct glyph_matrix
*m2
;
3126 w2
= frame_row_to_window (root
, frame_to
);
3127 m2
= w2
->current_matrix
;
3128 m2_from
= frame_from
- m2
->matrix_y
;
3129 copy_row_except_pointers (m
->rows
+ window_to
,
3130 m2
->rows
+ m2_from
);
3132 /* If frame line is empty, window line is empty, too. */
3133 if (!retained_p
[copy_from
[i
]])
3134 m
->rows
[window_to
].enabled_p
= 0;
3137 else if (from_inside_window_p
)
3141 /* If there was a copy between windows, make sure glyph
3142 pointers are in sync with the frame matrix. */
3144 sync_window_with_frame_matrix_rows (w
);
3146 /* Check that no pointers are lost. */
3150 /* Next window on same level. */
3151 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3158 /* Check that window and frame matrices agree about their
3159 understanding where glyphs of the rows are to find. For each
3160 window in the window tree rooted at W, check that rows in the
3161 matrices of leaf window agree with their frame matrices about
3165 check_window_matrix_pointers (w
)
3170 if (!NILP (w
->hchild
))
3171 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3172 else if (!NILP (w
->vchild
))
3173 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3176 struct frame
*f
= XFRAME (w
->frame
);
3177 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3178 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3181 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3186 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3187 a window and FRAME_MATRIX is the corresponding frame matrix. For
3188 each row in WINDOW_MATRIX check that it's a slice of the
3189 corresponding frame row. If it isn't, abort. */
3192 check_matrix_pointers (window_matrix
, frame_matrix
)
3193 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3195 /* Row number in WINDOW_MATRIX. */
3198 /* Row number corresponding to I in FRAME_MATRIX. */
3199 int j
= window_matrix
->matrix_y
;
3201 /* For all rows check that the row in the window matrix is a
3202 slice of the row in the frame matrix. If it isn't we didn't
3203 mirror an operation on the frame matrix correctly. */
3204 while (i
< window_matrix
->nrows
)
3206 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3207 frame_matrix
->rows
+ j
))
3213 #endif /* GLYPH_DEBUG != 0 */
3217 /**********************************************************************
3218 VPOS and HPOS translations
3219 **********************************************************************/
3223 /* Translate vertical position VPOS which is relative to window W to a
3224 vertical position relative to W's frame. */
3227 window_to_frame_vpos (w
, vpos
)
3231 struct frame
*f
= XFRAME (w
->frame
);
3233 xassert (!FRAME_WINDOW_P (f
));
3234 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3235 vpos
+= XFASTINT (w
->top
);
3236 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3241 /* Translate horizontal position HPOS which is relative to window W to
3242 a vertical position relative to W's frame. */
3245 window_to_frame_hpos (w
, hpos
)
3249 struct frame
*f
= XFRAME (w
->frame
);
3251 xassert (!FRAME_WINDOW_P (f
));
3252 hpos
+= XFASTINT (w
->left
);
3256 #endif /* GLYPH_DEBUG */
3260 /**********************************************************************
3262 **********************************************************************/
3264 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3265 "Clear frame FRAME and output again what is supposed to appear on it.")
3271 CHECK_LIVE_FRAME (frame
, 0);
3274 /* Ignore redraw requests, if frame has no glyphs yet.
3275 (Implementation note: It still has to be checked why we are
3276 called so early here). */
3277 if (!glyphs_initialized_initially_p
)
3281 if (FRAME_MSDOS_P (f
) || FRAME_W32_CONSOLE_P (f
))
3282 set_terminal_modes ();
3284 clear_current_matrices (f
);
3287 windows_or_buffers_changed
++;
3288 /* Mark all windows as inaccurate, so that every window will have
3289 its redisplay done. */
3290 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3291 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3297 /* Redraw frame F. This is nothing more than a call to the Lisp
3298 function redraw-frame. */
3305 XSETFRAME (frame
, f
);
3306 Fredraw_frame (frame
);
3310 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3311 "Clear and redisplay all visible frames.")
3314 Lisp_Object tail
, frame
;
3316 FOR_EACH_FRAME (tail
, frame
)
3317 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3318 Fredraw_frame (frame
);
3324 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3325 visible frames marked as garbaged. */
3328 redraw_garbaged_frames ()
3330 Lisp_Object tail
, frame
;
3332 FOR_EACH_FRAME (tail
, frame
)
3333 if (FRAME_VISIBLE_P (XFRAME (frame
))
3334 && FRAME_GARBAGED_P (XFRAME (frame
)))
3335 Fredraw_frame (frame
);
3340 /***********************************************************************
3342 ***********************************************************************/
3344 /* Try to update display and current glyph matrix directly.
3346 This function is called after a character G has been inserted into
3347 current_buffer. It tries to update the current glyph matrix and
3348 perform appropriate screen output to reflect the insertion. If it
3349 succeeds, the global flag redisplay_performed_directly_p will be
3350 set to 1, and thereby prevent the more costly general redisplay
3351 from running (see redisplay_internal).
3353 This function is not called for `hairy' character insertions.
3354 In particular, it is not called when after or before change
3355 functions exist, like they are used by font-lock. See keyboard.c
3356 for details where this function is called. */
3359 direct_output_for_insert (g
)
3362 register struct frame
*f
= SELECTED_FRAME ();
3363 struct window
*w
= XWINDOW (selected_window
);
3365 struct glyph_row
*glyph_row
;
3366 struct glyph
*glyphs
, *glyph
, *end
;
3368 /* Non-null means that Redisplay of W is based on window matrices. */
3369 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3370 /* Non-null means we are in overwrite mode. */
3371 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3373 struct text_pos pos
;
3374 int delta
, delta_bytes
;
3376 /* Not done directly. */
3377 redisplay_performed_directly_p
= 0;
3379 /* Quickly give up for some common cases. */
3380 if (cursor_in_echo_area
3381 /* Give up if fonts have changed. */
3383 /* Give up if face attributes have been changed. */
3384 || face_change_count
3385 /* Give up if cursor position not really known. */
3386 || !display_completed
3387 /* Give up if buffer appears in two places. */
3388 || buffer_shared
> 1
3389 /* Give up if currently displaying a message instead of the
3390 minibuffer contents. */
3391 || (EQ (selected_window
, minibuf_window
)
3392 && EQ (minibuf_window
, echo_area_window
))
3393 /* Give up for hscrolled mini-buffer because display of the prompt
3394 is handled specially there (see display_line). */
3395 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3396 /* Give up if overwriting in the middle of a line. */
3399 && FETCH_BYTE (PT
) != '\n')
3400 /* Give up for tabs and line ends. */
3404 /* Give up if unable to display the cursor in the window. */
3405 || w
->cursor
.vpos
< 0
3406 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3407 /* Can't do it in a continued line because continuation
3408 lines would change. */
3409 (glyph_row
->continued_p
3410 /* Can't use this method if the line overlaps others or is
3411 overlapped by others because these other lines would
3412 have to be redisplayed. */
3413 || glyph_row
->overlapping_p
3414 || glyph_row
->overlapped_p
))
3415 /* Can't do it for partial width windows on terminal frames
3416 because we can't clear to eol in such a window. */
3417 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3420 /* Set up a display iterator structure for W. Glyphs will be
3421 produced in scratch_glyph_row. Current position is W's cursor
3423 clear_glyph_row (&scratch_glyph_row
);
3424 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3425 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3426 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3429 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3430 if (glyph_row
->mouse_face_p
)
3433 /* Give up if highlighting trailing whitespace and we have trailing
3434 whitespace in glyph_row. We would have to remove the trailing
3435 whitespace face in that case. */
3436 if (!NILP (Vshow_trailing_whitespace
)
3437 && glyph_row
->used
[TEXT_AREA
])
3441 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3442 if (last
->type
== STRETCH_GLYPH
3443 || (last
->type
== CHAR_GLYPH
3444 && last
->u
.ch
== ' '))
3448 /* Give up if there are overlay strings at pos. This would fail
3449 if the overlay string has newlines in it. */
3450 if (STRINGP (it
.string
))
3453 it
.hpos
= w
->cursor
.hpos
;
3454 it
.vpos
= w
->cursor
.vpos
;
3455 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3456 it
.current_y
= w
->cursor
.y
;
3457 it
.end_charpos
= PT
;
3458 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3460 /* More than one display element may be returned for PT - 1 if
3461 (i) it's a control character which is translated into `\003' or
3462 `^C', or (ii) it has a display table entry, or (iii) it's a
3463 combination of both. */
3464 delta
= delta_bytes
= 0;
3465 while (get_next_display_element (&it
))
3467 PRODUCE_GLYPHS (&it
);
3469 /* Give up if glyph doesn't fit completely on the line. */
3470 if (it
.current_x
>= it
.last_visible_x
)
3473 /* Give up if new glyph has different ascent or descent than
3474 the original row, or if it is not a character glyph. */
3475 if (glyph_row
->ascent
!= it
.ascent
3476 || glyph_row
->height
!= it
.ascent
+ it
.descent
3477 || glyph_row
->phys_ascent
!= it
.phys_ascent
3478 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3479 || it
.what
!= IT_CHARACTER
)
3483 delta_bytes
+= it
.len
;
3484 set_iterator_to_next (&it
, 1);
3487 /* Give up if we hit the right edge of the window. We would have
3488 to insert truncation or continuation glyphs. */
3489 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3490 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3493 /* Give up if there is a \t following in the line. */
3495 it2
.end_charpos
= ZV
;
3496 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3497 while (get_next_display_element (&it2
)
3498 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3502 set_iterator_to_next (&it2
, 1);
3505 /* Number of new glyphs produced. */
3506 n
= it
.glyph_row
->used
[TEXT_AREA
];
3508 /* Start and end of glyphs in original row. */
3509 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3510 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3512 /* Make room for new glyphs, then insert them. */
3513 xassert (end
- glyphs
- n
>= 0);
3514 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3515 (end
- glyphs
- n
) * sizeof (*end
));
3516 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3517 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3518 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3520 /* Compute new line width. */
3521 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3522 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3523 glyph_row
->pixel_width
= glyph_row
->x
;
3526 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3530 /* Increment buffer positions for glyphs following the newly
3532 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3533 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3534 glyph
->charpos
+= delta
;
3536 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3538 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3539 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3542 /* Adjust positions in lines following the one we are in. */
3543 increment_matrix_positions (w
->current_matrix
,
3545 w
->current_matrix
->nrows
,
3546 delta
, delta_bytes
);
3548 glyph_row
->contains_overlapping_glyphs_p
3549 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3551 glyph_row
->displays_text_p
= 1;
3552 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3553 XFASTINT (w
->window_end_vpos
)));
3555 if (!NILP (Vshow_trailing_whitespace
))
3556 highlight_trailing_whitespace (it
.f
, glyph_row
);
3558 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3559 In the middle, we have to insert glyphs. Note that this is now
3560 implemented for X frames. The implementation uses updated_window
3562 updated_row
= glyph_row
;
3566 rif
->update_window_begin_hook (w
);
3568 if (glyphs
== end
- n
)
3569 rif
->write_glyphs (glyphs
, n
);
3571 rif
->insert_glyphs (glyphs
, n
);
3575 if (glyphs
== end
- n
)
3576 write_glyphs (glyphs
, n
);
3578 insert_glyphs (glyphs
, n
);
3581 w
->cursor
.hpos
+= n
;
3582 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3583 xassert (w
->cursor
.hpos
>= 0
3584 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3586 /* How to set the cursor differs depending on whether we are
3587 using a frame matrix or a window matrix. Note that when
3588 a frame matrix is used, cursor_to expects frame coordinates,
3589 and the X and Y parameters are not used. */
3590 if (window_redisplay_p
)
3591 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3592 w
->cursor
.y
, w
->cursor
.x
);
3596 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3597 + (INTEGERP (w
->left_margin_width
)
3598 ? XFASTINT (w
->left_margin_width
)
3600 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3605 rif
->update_window_end_hook (w
, 1, 0);
3610 TRACE ((stderr
, "direct output for insert\n"));
3612 UNCHANGED_MODIFIED
= MODIFF
;
3613 BEG_UNCHANGED
= GPT
- BEG
;
3614 XSETFASTINT (w
->last_point
, PT
);
3615 w
->last_cursor
= w
->cursor
;
3616 XSETFASTINT (w
->last_modified
, MODIFF
);
3617 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3619 redisplay_performed_directly_p
= 1;
3624 /* Perform a direct display update for moving PT by N positions
3625 left or right. N < 0 means a movement backwards. This function
3626 is currently only called for N == 1 or N == -1. */
3629 direct_output_forward_char (n
)
3632 struct frame
*f
= SELECTED_FRAME ();
3633 struct window
*w
= XWINDOW (selected_window
);
3634 struct glyph_row
*row
;
3636 /* Give up if point moved out of or into a composition. */
3637 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3638 current_buffer
, PT
))
3641 /* Give up if face attributes have been changed. */
3642 if (face_change_count
)
3645 /* Give up if current matrix is not up to date or we are
3646 displaying a message. */
3647 if (!display_completed
|| cursor_in_echo_area
)
3650 /* Give up if the buffer's direction is reversed. */
3651 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3654 /* Can't use direct output if highlighting a region. */
3655 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3658 /* Can't use direct output if highlighting trailing whitespace. */
3659 if (!NILP (Vshow_trailing_whitespace
))
3662 /* Give up if we are showing a message or just cleared the message
3663 because we might need to resize the echo area window. */
3664 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3667 /* Give up if currently displaying a message instead of the
3668 minibuffer contents. */
3669 if (XWINDOW (minibuf_window
) == w
3670 && EQ (minibuf_window
, echo_area_window
))
3673 /* Give up if we don't know where the cursor is. */
3674 if (w
->cursor
.vpos
< 0)
3677 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3679 /* Give up if PT is outside of the last known cursor row. */
3680 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3681 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3684 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3686 w
->last_cursor
= w
->cursor
;
3687 XSETFASTINT (w
->last_point
, PT
);
3689 xassert (w
->cursor
.hpos
>= 0
3690 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3692 if (FRAME_WINDOW_P (f
))
3693 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3694 w
->cursor
.y
, w
->cursor
.x
);
3698 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3699 + (INTEGERP (w
->left_margin_width
)
3700 ? XFASTINT (w
->left_margin_width
)
3702 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3707 redisplay_performed_directly_p
= 1;
3713 /***********************************************************************
3715 ***********************************************************************/
3717 /* Update frame F based on the data in desired matrices.
3719 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3720 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3723 Value is non-zero if redisplay was stopped due to pending input. */
3726 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3729 int inhibit_hairy_id_p
;
3731 /* 1 means display has been paused because of pending input. */
3733 struct window
*root_window
= XWINDOW (f
->root_window
);
3735 if (FRAME_WINDOW_P (f
))
3737 /* We are working on window matrix basis. All windows whose
3738 flag must_be_updated_p is set have to be updated. */
3740 /* Record that we are not working on frame matrices. */
3741 set_frame_matrix_frame (NULL
);
3743 /* Update all windows in the window tree of F, maybe stopping
3744 when pending input is detected. */
3747 /* Update the menu bar on X frames that don't have toolkit
3749 if (WINDOWP (f
->menu_bar_window
))
3750 update_window (XWINDOW (f
->menu_bar_window
), 1);
3752 /* Update the tool-bar window, if present. */
3753 if (WINDOWP (f
->tool_bar_window
))
3756 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3758 /* Update tool-bar window. */
3759 if (w
->must_be_updated_p
)
3761 update_window (w
, 1);
3762 w
->must_be_updated_p
= 0;
3764 /* Swap tool-bar strings. We swap because we want to
3766 tem
= f
->current_tool_bar_string
;
3767 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3768 f
->desired_tool_bar_string
= tem
;
3773 /* Update windows. */
3774 paused_p
= update_window_tree (root_window
, force_p
);
3777 #if 0 /* This flush is a performance bottleneck under X,
3778 and it doesn't seem to be necessary anyway. */
3779 rif
->flush_display (f
);
3784 /* We are working on frame matrix basis. Set the frame on whose
3785 frame matrix we operate. */
3786 set_frame_matrix_frame (f
);
3788 /* Build F's desired matrix from window matrices. */
3789 build_frame_matrix (f
);
3791 /* Update the display */
3793 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3797 fflush (termscript
);
3800 /* Check window matrices for lost pointers. */
3802 check_window_matrix_pointers (root_window
);
3803 add_frame_display_history (f
, paused_p
);
3807 /* Reset flags indicating that a window should be updated. */
3808 set_window_update_flags (root_window
, 0);
3810 display_completed
= !paused_p
;
3816 /************************************************************************
3817 Window-based updates
3818 ************************************************************************/
3820 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3821 don't stop updating when input is pending. */
3824 update_window_tree (w
, force_p
)
3830 while (w
&& !paused_p
)
3832 if (!NILP (w
->hchild
))
3833 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3834 else if (!NILP (w
->vchild
))
3835 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3836 else if (w
->must_be_updated_p
)
3837 paused_p
|= update_window (w
, force_p
);
3839 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3846 /* Update window W if its flag must_be_updated_p is non-zero. If
3847 FORCE_P is non-zero, don't stop updating if input is pending. */
3850 update_single_window (w
, force_p
)
3854 if (w
->must_be_updated_p
)
3856 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3858 /* Record that this is not a frame-based redisplay. */
3859 set_frame_matrix_frame (NULL
);
3863 update_window (w
, force_p
);
3866 /* Reset flag in W. */
3867 w
->must_be_updated_p
= 0;
3872 /* Redraw lines from the current matrix of window W that are
3873 overlapped by other rows. YB is bottom-most y-position in W. */
3876 redraw_overlapped_rows (w
, yb
)
3882 /* If rows overlapping others have been changed, the rows being
3883 overlapped have to be redrawn. This won't draw lines that have
3884 already been drawn in update_window_line because overlapped_p in
3885 desired rows is 0, so after row assignment overlapped_p in
3886 current rows is 0. */
3887 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3889 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3891 if (!row
->enabled_p
)
3893 else if (row
->mode_line_p
)
3896 if (row
->overlapped_p
)
3898 enum glyph_row_area area
;
3900 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3903 updated_area
= area
;
3904 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3905 if (row
->used
[area
])
3906 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3907 rif
->clear_end_of_line (-1);
3910 row
->overlapped_p
= 0;
3913 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3919 /* Redraw lines from the current matrix of window W that overlap
3920 others. YB is bottom-most y-position in W. */
3923 redraw_overlapping_rows (w
, yb
)
3928 struct glyph_row
*row
;
3930 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3932 row
= w
->current_matrix
->rows
+ i
;
3934 if (!row
->enabled_p
)
3936 else if (row
->mode_line_p
)
3939 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3941 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3943 if (row
->used
[LEFT_MARGIN_AREA
])
3944 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3946 if (row
->used
[TEXT_AREA
])
3947 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3949 if (row
->used
[RIGHT_MARGIN_AREA
])
3950 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3952 /* Record in neighbor rows that ROW overwrites part of their
3954 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3955 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3956 if ((row
->phys_height
- row
->phys_ascent
3957 > row
->height
- row
->ascent
)
3959 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3970 /* Check that no row in the current matrix of window W is enabled
3971 which is below what's displayed in the window. */
3974 check_current_matrix_flags (w
)
3977 int last_seen_p
= 0;
3978 int i
, yb
= window_text_bottom_y (w
);
3980 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3982 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3983 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3985 else if (last_seen_p
&& row
->enabled_p
)
3990 #endif /* GLYPH_DEBUG */
3993 /* Update display of window W. FORCE_P non-zero means that we should
3994 not stop when detecting pending input. */
3997 update_window (w
, force_p
)
4001 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4003 int preempt_count
= baud_rate
/ 2400 + 1;
4004 extern int input_pending
;
4005 extern Lisp_Object do_mouse_tracking
;
4007 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4008 extern struct frame
*updating_frame
;
4011 /* Check that W's frame doesn't have glyph matrices. */
4012 xassert (FRAME_WINDOW_P (f
));
4013 xassert (updating_frame
!= NULL
);
4015 /* Check pending input the first time so that we can quickly return. */
4016 if (redisplay_dont_pause
)
4019 detect_input_pending ();
4021 /* If forced to complete the update, or if no input is pending, do
4023 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4025 struct glyph_row
*row
, *end
;
4026 struct glyph_row
*mode_line_row
;
4027 struct glyph_row
*header_line_row
= NULL
;
4028 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4030 rif
->update_window_begin_hook (w
);
4031 yb
= window_text_bottom_y (w
);
4033 /* If window has a top line, update it before everything else.
4034 Adjust y-positions of other rows by the top line height. */
4035 row
= desired_matrix
->rows
;
4036 end
= row
+ desired_matrix
->nrows
- 1;
4037 if (row
->mode_line_p
)
4038 header_line_row
= row
++;
4040 /* Update the mode line, if necessary. */
4041 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4042 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4044 mode_line_row
->y
= yb
;
4045 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4047 &mouse_face_overwritten_p
);
4051 /* Find first enabled row. Optimizations in redisplay_internal
4052 may lead to an update with only one row enabled. There may
4053 be also completely empty matrices. */
4054 while (row
< end
&& !row
->enabled_p
)
4057 /* Try reusing part of the display by copying. */
4058 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4060 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4063 /* All rows were found to be equal. */
4072 /* Update the top mode line after scrolling because a new top
4073 line would otherwise overwrite lines at the top of the window
4074 that can be scrolled. */
4075 if (header_line_row
&& header_line_row
->enabled_p
)
4077 header_line_row
->y
= 0;
4078 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4082 /* Update the rest of the lines. */
4083 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4086 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4089 /* We'll Have to play a little bit with when to
4090 detect_input_pending. If it's done too often,
4091 scrolling large windows with repeated scroll-up
4092 commands will too quickly pause redisplay. */
4093 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4094 detect_input_pending ();
4096 changed_p
|= update_window_line (w
, vpos
,
4097 &mouse_face_overwritten_p
);
4099 /* Mark all rows below the last visible one in the current
4100 matrix as invalid. This is necessary because of
4101 variable line heights. Consider the case of three
4102 successive redisplays, where the first displays 5
4103 lines, the second 3 lines, and the third 5 lines again.
4104 If the second redisplay wouldn't mark rows in the
4105 current matrix invalid, the third redisplay might be
4106 tempted to optimize redisplay based on lines displayed
4107 in the first redisplay. */
4108 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4109 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4110 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4113 /* Was display preempted? */
4114 paused_p
= row
< end
;
4118 /* Fix the appearance of overlapping(overlapped rows. */
4119 if (!paused_p
&& !w
->pseudo_window_p
)
4121 if (changed_p
&& rif
->fix_overlapping_area
)
4123 redraw_overlapped_rows (w
, yb
);
4124 redraw_overlapping_rows (w
, yb
);
4127 /* Make cursor visible at cursor position of W. */
4128 set_window_cursor_after_update (w
);
4130 #if 0 /* Check that current matrix invariants are satisfied. This is
4131 for debugging only. See the comment of check_matrix_invariants. */
4132 IF_DEBUG (check_matrix_invariants (w
));
4137 /* Remember the redisplay method used to display the matrix. */
4138 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4141 /* End of update of window W. */
4142 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
4148 /* check_current_matrix_flags (w); */
4149 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4152 clear_glyph_matrix (desired_matrix
);
4158 /* Update the display of area AREA in window W, row number VPOS.
4159 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4162 update_marginal_area (w
, area
, vpos
)
4166 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4168 /* Let functions in xterm.c know what area subsequent X positions
4169 will be relative to. */
4170 updated_area
= area
;
4172 /* Set cursor to start of glyphs, write them, and clear to the end
4173 of the area. I don't think that something more sophisticated is
4174 necessary here, since marginal areas will not be the default. */
4175 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4176 if (desired_row
->used
[area
])
4177 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4178 rif
->clear_end_of_line (-1);
4182 /* Update the display of the text area of row VPOS in window W.
4183 Value is non-zero if display has changed. */
4186 update_text_area (w
, vpos
)
4190 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4191 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4194 /* Let functions in xterm.c know what area subsequent X positions
4195 will be relative to. */
4196 updated_area
= TEXT_AREA
;
4198 /* If rows are at different X or Y, or rows have different height,
4199 or the current row is marked invalid, write the entire line. */
4200 if (!current_row
->enabled_p
4201 || desired_row
->y
!= current_row
->y
4202 || desired_row
->ascent
!= current_row
->ascent
4203 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4204 || desired_row
->phys_height
!= current_row
->phys_height
4205 || desired_row
->visible_height
!= current_row
->visible_height
4206 || current_row
->overlapped_p
4207 || current_row
->mouse_face_p
4208 || current_row
->x
!= desired_row
->x
)
4210 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4212 if (desired_row
->used
[TEXT_AREA
])
4213 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4214 desired_row
->used
[TEXT_AREA
]);
4216 /* Clear to end of window. */
4217 rif
->clear_end_of_line (-1);
4223 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4224 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4225 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4226 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4228 #if 0 /* This shouldn't be necessary. Let's check it. */
4229 /* If the desired row extends its face to the text area end,
4230 make sure we write at least one glyph, so that the face
4231 extension actually takes place. */
4232 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4236 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4244 /* Skip over glyphs that both rows have in common. These
4245 don't have to be written. We can't skip if the last
4246 current glyph overlaps the glyph to its right. For
4247 example, consider a current row of `if ' with the `f' in
4248 Courier bold so that it overlaps the ` ' to its right.
4249 If the desired row is ` ', we would skip over the space
4250 after the `if' and there would remain a pixel from the
4251 `f' on the screen. */
4252 if (overlapping_glyphs_p
&& i
> 0)
4254 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4257 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4259 can_skip_p
= right
== 0;
4265 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4267 x
+= desired_glyph
->pixel_width
;
4268 ++desired_glyph
, ++current_glyph
, ++i
;
4271 /* Consider the case that the current row contains "xxx
4272 ppp ggg" in italic Courier font, and the desired row
4273 is "xxx ggg". The character `p' has lbearing, `g'
4274 has not. The loop above will stop in front of the
4275 first `p' in the current row. If we would start
4276 writing glyphs there, we wouldn't erase the lbearing
4277 of the `p'. The rest of the lbearing problem is then
4278 taken care of by x_draw_glyphs. */
4279 if (overlapping_glyphs_p
4281 && i
< current_row
->used
[TEXT_AREA
]
4282 && (current_row
->used
[TEXT_AREA
]
4283 != desired_row
->used
[TEXT_AREA
]))
4287 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4289 while (left
> 0 && i
> 0)
4291 --i
, --desired_glyph
, --current_glyph
;
4292 x
-= desired_glyph
->pixel_width
;
4293 left
-= desired_glyph
->pixel_width
;
4298 /* Try to avoid writing the entire rest of the desired row
4299 by looking for a resync point. This mainly prevents
4300 mode line flickering in the case the mode line is in
4301 fixed-pitch font, which it usually will be. */
4302 if (i
< desired_row
->used
[TEXT_AREA
])
4304 int start_x
= x
, start_hpos
= i
;
4305 struct glyph
*start
= desired_glyph
;
4307 int skip_first_p
= !can_skip_p
;
4309 /* Find the next glyph that's equal again. */
4312 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4315 x
+= desired_glyph
->pixel_width
;
4316 current_x
+= current_glyph
->pixel_width
;
4317 ++desired_glyph
, ++current_glyph
, ++i
;
4321 if (i
== start_hpos
|| x
!= current_x
)
4325 desired_glyph
= start
;
4329 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4330 rif
->write_glyphs (start
, i
- start_hpos
);
4335 /* Write the rest. */
4336 if (i
< desired_row
->used
[TEXT_AREA
])
4338 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4339 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4343 /* Maybe clear to end of line. */
4344 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4347 /* If new row extends to the end of the text area, nothing
4348 has to be cleared, if and only if we did a write_glyphs
4349 above. This is made sure by setting desired_stop_pos
4350 appropriately above. */
4351 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4354 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4356 /* If old row extends to the end of the text area, clear. */
4357 if (i
>= desired_row
->used
[TEXT_AREA
])
4358 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4359 desired_row
->x
+ desired_row
->pixel_width
);
4360 rif
->clear_end_of_line (-1);
4363 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4365 /* Otherwise clear to the end of the old row. Everything
4366 after that position should be clear already. */
4369 if (i
>= desired_row
->used
[TEXT_AREA
])
4370 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4371 desired_row
->x
+ desired_row
->pixel_width
);
4373 /* If cursor is displayed at the end of the line, make sure
4374 it's cleared. Nowadays we don't have a phys_cursor_glyph
4375 with which to erase the cursor (because this method
4376 doesn't work with lbearing/rbearing), so we must do it
4378 if (vpos
== w
->phys_cursor
.vpos
4379 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4381 w
->phys_cursor_on_p
= 0;
4385 x
= current_row
->x
+ current_row
->pixel_width
;
4386 rif
->clear_end_of_line (x
);
4395 /* Update row VPOS in window W. Value is non-zero if display has been
4399 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4401 int vpos
, *mouse_face_overwritten_p
;
4403 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4404 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4407 /* Set the row being updated. This is important to let xterm.c
4408 know what line height values are in effect. */
4409 updated_row
= desired_row
;
4411 /* A row can be completely invisible in case a desired matrix was
4412 built with a vscroll and then make_cursor_line_fully_visible shifts
4413 the matrix. Make sure to make such rows current anyway, since
4414 we need the correct y-position, for example, in the current matrix. */
4415 if (desired_row
->mode_line_p
4416 || desired_row
->visible_height
> 0)
4418 xassert (desired_row
->enabled_p
);
4420 /* Update display of the left margin area, if there is one. */
4421 if (!desired_row
->full_width_p
4422 && !NILP (w
->left_margin_width
))
4425 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4428 /* Update the display of the text area. */
4429 if (update_text_area (w
, vpos
))
4432 if (current_row
->mouse_face_p
)
4433 *mouse_face_overwritten_p
= 1;
4436 /* Update display of the right margin area, if there is one. */
4437 if (!desired_row
->full_width_p
4438 && !NILP (w
->right_margin_width
))
4441 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4444 /* Draw truncation marks etc. */
4445 if (!current_row
->enabled_p
4446 || desired_row
->y
!= current_row
->y
4447 || desired_row
->visible_height
!= current_row
->visible_height
4448 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4449 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4450 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4451 || desired_row
->continued_p
!= current_row
->continued_p
4452 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4453 || (desired_row
->indicate_empty_line_p
4454 != current_row
->indicate_empty_line_p
)
4455 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4456 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4457 rif
->after_update_window_line_hook (desired_row
);
4460 /* Update current_row from desired_row. */
4461 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4467 /* Set the cursor after an update of window W. This function may only
4468 be called from update_window. */
4471 set_window_cursor_after_update (w
)
4474 struct frame
*f
= XFRAME (w
->frame
);
4475 int cx
, cy
, vpos
, hpos
;
4477 /* Not intended for frame matrix updates. */
4478 xassert (FRAME_WINDOW_P (f
));
4480 if (cursor_in_echo_area
4481 && !NILP (echo_area_buffer
[0])
4482 /* If we are showing a message instead of the mini-buffer,
4483 show the cursor for the message instead. */
4484 && XWINDOW (minibuf_window
) == w
4485 && EQ (minibuf_window
, echo_area_window
)
4486 /* These cases apply only to the frame that contains
4487 the active mini-buffer window. */
4488 && FRAME_HAS_MINIBUF_P (f
)
4489 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4491 cx
= cy
= vpos
= hpos
= 0;
4493 if (cursor_in_echo_area
>= 0)
4495 /* If the mini-buffer is several lines high, find the last
4496 line that has any text on it. Note: either all lines
4497 are enabled or none. Otherwise we wouldn't be able to
4499 struct glyph_row
*row
, *last_row
;
4500 struct glyph
*glyph
;
4501 int yb
= window_text_bottom_y (w
);
4504 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4508 if (row
->used
[TEXT_AREA
]
4509 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4512 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4518 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4519 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4521 while (last
> start
&& last
->charpos
< 0)
4524 for (glyph
= start
; glyph
< last
; ++glyph
)
4526 cx
+= glyph
->pixel_width
;
4531 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4539 hpos
= w
->cursor
.hpos
;
4540 vpos
= w
->cursor
.vpos
;
4543 /* Window cursor can be out of sync for horizontally split windows. */
4544 hpos
= max (0, hpos
);
4545 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4546 vpos
= max (0, vpos
);
4547 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4548 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4552 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4553 tree rooted at W. */
4556 set_window_update_flags (w
, on_p
)
4562 if (!NILP (w
->hchild
))
4563 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4564 else if (!NILP (w
->vchild
))
4565 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4567 w
->must_be_updated_p
= on_p
;
4569 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4575 /***********************************************************************
4576 Window-Based Scrolling
4577 ***********************************************************************/
4579 /* Structure describing rows in scrolling_window. */
4583 /* Number of occurrences of this row in desired and current matrix. */
4584 int old_uses
, new_uses
;
4586 /* Vpos of row in new matrix. */
4587 int new_line_number
;
4589 /* Bucket index of this row_entry in the hash table row_table. */
4592 /* The row described by this entry. */
4593 struct glyph_row
*row
;
4595 /* Hash collision chain. */
4596 struct row_entry
*next
;
4599 /* A pool to allocate row_entry structures from, and the size of the
4600 pool. The pool is reallocated in scrolling_window when we find
4601 that we need a larger one. */
4603 static struct row_entry
*row_entry_pool
;
4604 static int row_entry_pool_size
;
4606 /* Index of next free entry in row_entry_pool. */
4608 static int row_entry_idx
;
4610 /* The hash table used during scrolling, and the table's size. This
4611 table is used to quickly identify equal rows in the desired and
4614 static struct row_entry
**row_table
;
4615 static int row_table_size
;
4617 /* Vectors of pointers to row_entry structures belonging to the
4618 current and desired matrix, and the size of the vectors. */
4620 static struct row_entry
**old_lines
, **new_lines
;
4621 static int old_lines_size
, new_lines_size
;
4623 /* A pool to allocate run structures from, and its size. */
4625 static struct run
*run_pool
;
4626 static int runs_size
;
4628 /* A vector of runs of lines found during scrolling. */
4630 static struct run
**runs
;
4632 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4633 struct glyph_row
*));
4636 /* Add glyph row ROW to the scrolling hash table during the scrolling
4639 static INLINE
struct row_entry
*
4640 add_row_entry (w
, row
)
4642 struct glyph_row
*row
;
4644 struct row_entry
*entry
;
4645 int i
= row
->hash
% row_table_size
;
4647 entry
= row_table
[i
];
4648 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4649 entry
= entry
->next
;
4653 entry
= row_entry_pool
+ row_entry_idx
++;
4655 entry
->old_uses
= entry
->new_uses
= 0;
4656 entry
->new_line_number
= 0;
4658 entry
->next
= row_table
[i
];
4659 row_table
[i
] = entry
;
4666 /* Try to reuse part of the current display of W by scrolling lines.
4667 HEADER_LINE_P non-zero means W has a top mode line.
4669 The algorithm is taken from Communications of the ACM, Apr78 "A
4670 Technique for Isolating Differences Between Files." It should take
4673 A short outline of the steps of the algorithm
4675 1. Skip lines equal at the start and end of both matrices.
4677 2. Enter rows in the current and desired matrix into a symbol
4678 table, counting how often they appear in both matrices.
4680 3. Rows that appear exactly once in both matrices serve as anchors,
4681 i.e. we assume that such lines are likely to have been moved.
4683 4. Starting from anchor lines, extend regions to be scrolled both
4684 forward and backward.
4688 -1 if all rows were found to be equal.
4689 0 to indicate that we did not scroll the display, or
4690 1 if we did scroll. */
4693 scrolling_window (w
, header_line_p
)
4697 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4698 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4699 int yb
= window_text_bottom_y (w
);
4700 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4701 int nruns
, nbytes
, n
, run_idx
;
4702 struct row_entry
*entry
;
4704 /* Skip over rows equal at the start. */
4705 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4707 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4708 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4713 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4714 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4715 && row_equal_p (w
, c
, d
, 1))
4724 /* Give up if some rows in the desired matrix are not enabled. */
4725 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4728 first_old
= first_new
= i
;
4730 /* Set last_new to the index + 1 of the last enabled row in the
4733 while (i
< desired_matrix
->nrows
- 1
4734 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4735 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4738 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4743 /* Set last_old to the index + 1 of the last enabled row in the
4744 current matrix. We don't look at the enabled flag here because
4745 we plan to reuse part of the display even if other parts are
4748 while (i
< current_matrix
->nrows
- 1)
4750 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4759 /* Skip over rows equal at the bottom. */
4762 while (i
- 1 > first_new
4763 && j
- 1 > first_old
4764 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4765 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4766 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4768 MATRIX_ROW (desired_matrix
, i
- 1),
4769 MATRIX_ROW (current_matrix
, j
- 1), 1))
4774 /* Nothing to do if all rows are equal. */
4775 if (last_new
== first_new
)
4778 /* Reallocate vectors, tables etc. if necessary. */
4780 if (current_matrix
->nrows
> old_lines_size
)
4782 old_lines_size
= current_matrix
->nrows
;
4783 nbytes
= old_lines_size
* sizeof *old_lines
;
4784 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4787 if (desired_matrix
->nrows
> new_lines_size
)
4789 new_lines_size
= desired_matrix
->nrows
;
4790 nbytes
= new_lines_size
* sizeof *new_lines
;
4791 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4794 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4795 if (3 * n
> row_table_size
)
4797 row_table_size
= next_almost_prime (3 * n
);
4798 nbytes
= row_table_size
* sizeof *row_table
;
4799 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4800 bzero (row_table
, nbytes
);
4803 if (n
> row_entry_pool_size
)
4805 row_entry_pool_size
= n
;
4806 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4807 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4810 if (desired_matrix
->nrows
> runs_size
)
4812 runs_size
= desired_matrix
->nrows
;
4813 nbytes
= runs_size
* sizeof *runs
;
4814 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4815 nbytes
= runs_size
* sizeof *run_pool
;
4816 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4819 nruns
= run_idx
= 0;
4822 /* Add rows from the current and desired matrix to the hash table
4823 row_hash_table to be able to find equal ones quickly. */
4825 for (i
= first_old
; i
< last_old
; ++i
)
4827 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4829 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4830 old_lines
[i
] = entry
;
4834 old_lines
[i
] = NULL
;
4837 for (i
= first_new
; i
< last_new
; ++i
)
4839 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4840 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4842 entry
->new_line_number
= i
;
4843 new_lines
[i
] = entry
;
4846 /* Identify moves based on lines that are unique and equal
4847 in both matrices. */
4848 for (i
= first_old
; i
< last_old
;)
4850 && old_lines
[i
]->old_uses
== 1
4851 && old_lines
[i
]->new_uses
== 1)
4854 int new_line
= old_lines
[i
]->new_line_number
;
4855 struct run
*run
= run_pool
+ run_idx
++;
4858 run
->current_vpos
= i
;
4859 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4860 run
->desired_vpos
= new_line
;
4861 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4863 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4865 /* Extend backward. */
4868 while (j
> first_old
4870 && old_lines
[j
] == new_lines
[k
])
4872 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4873 --run
->current_vpos
;
4874 --run
->desired_vpos
;
4877 run
->desired_y
-= h
;
4878 run
->current_y
-= h
;
4882 /* Extend forward. */
4887 && old_lines
[j
] == new_lines
[k
])
4889 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4895 /* Insert run into list of all runs. Order runs by copied
4896 pixel lines. Note that we record runs that don't have to
4897 be copied because they are already in place. This is done
4898 because we can avoid calling update_window_line in this
4900 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4902 for (k
= nruns
; k
> j
; --k
)
4903 runs
[k
] = runs
[k
- 1];
4912 /* Do the moves. Do it in a way that we don't overwrite something
4913 we want to copy later on. This is not solvable in general
4914 because there is only one display and we don't have a way to
4915 exchange areas on this display. Example:
4917 +-----------+ +-----------+
4919 +-----------+ --> +-----------+
4921 +-----------+ +-----------+
4923 Instead, prefer bigger moves, and invalidate moves that would
4924 copy from where we copied to. */
4926 for (i
= 0; i
< nruns
; ++i
)
4927 if (runs
[i
]->nrows
> 0)
4929 struct run
*r
= runs
[i
];
4931 /* Copy on the display. */
4932 if (r
->current_y
!= r
->desired_y
)
4934 rif
->scroll_run_hook (w
, r
);
4936 /* Invalidate runs that copy from where we copied to. */
4937 for (j
= i
+ 1; j
< nruns
; ++j
)
4939 struct run
*p
= runs
[j
];
4941 if ((p
->current_y
>= r
->desired_y
4942 && p
->current_y
< r
->desired_y
+ r
->height
)
4943 || (p
->current_y
+ p
->height
>= r
->desired_y
4944 && (p
->current_y
+ p
->height
4945 < r
->desired_y
+ r
->height
)))
4950 /* Assign matrix rows. */
4951 for (j
= 0; j
< r
->nrows
; ++j
)
4953 struct glyph_row
*from
, *to
;
4954 int to_overlapped_p
;
4956 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4957 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4958 to_overlapped_p
= to
->overlapped_p
;
4959 assign_row (to
, from
);
4960 to
->enabled_p
= 1, from
->enabled_p
= 0;
4961 to
->overlapped_p
= to_overlapped_p
;
4965 /* Clear the hash table, for the next time. */
4966 for (i
= 0; i
< row_entry_idx
; ++i
)
4967 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4969 /* Value is non-zero to indicate that we scrolled the display. */
4975 /************************************************************************
4977 ************************************************************************/
4979 /* Update the desired frame matrix of frame F.
4981 FORCE_P non-zero means that the update should not be stopped by
4982 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4983 should not be tried.
4985 Value is non-zero if update was stopped due to pending input. */
4988 update_frame_1 (f
, force_p
, inhibit_id_p
)
4993 /* Frame matrices to work on. */
4994 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4995 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4998 int preempt_count
= baud_rate
/ 2400 + 1;
4999 extern int input_pending
;
5001 xassert (current_matrix
&& desired_matrix
);
5003 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5004 calculate_costs (f
);
5006 if (preempt_count
<= 0)
5009 if (redisplay_dont_pause
)
5011 else if (!force_p
&& detect_input_pending ())
5017 /* If we cannot insert/delete lines, it's no use trying it. */
5018 if (!line_ins_del_ok
)
5021 /* See if any of the desired lines are enabled; don't compute for
5022 i/d line if just want cursor motion. */
5023 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5024 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5027 /* Try doing i/d line, if not yet inhibited. */
5028 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5029 force_p
|= scrolling (f
);
5031 /* Update the individual lines as needed. Do bottom line first. */
5032 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5033 update_frame_line (f
, desired_matrix
->nrows
- 1);
5035 /* Now update the rest of the lines. */
5036 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5038 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5040 if (FRAME_TERMCAP_P (f
))
5042 /* Flush out every so many lines.
5043 Also flush out if likely to have more than 1k buffered
5044 otherwise. I'm told that some telnet connections get
5045 really screwed by more than 1k output at once. */
5046 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5048 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5051 if (preempt_count
== 1)
5053 #ifdef EMACS_OUTQSIZE
5054 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5055 /* Probably not a tty. Ignore the error and reset
5056 * the outq count. */
5057 outq
= PENDING_OUTPUT_COUNT (stdout
);
5060 if (baud_rate
<= outq
&& baud_rate
> 0)
5061 sleep (outq
/ baud_rate
);
5066 if ((i
- 1) % preempt_count
== 0)
5067 detect_input_pending ();
5069 update_frame_line (f
, i
);
5073 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5075 /* Now just clean up termcap drivers and set cursor, etc. */
5078 if ((cursor_in_echo_area
5079 /* If we are showing a message instead of the mini-buffer,
5080 show the cursor for the message instead of for the
5081 (now hidden) mini-buffer contents. */
5082 || (EQ (minibuf_window
, selected_window
)
5083 && EQ (minibuf_window
, echo_area_window
)
5084 && !NILP (echo_area_buffer
[0])))
5085 /* These cases apply only to the frame that contains
5086 the active mini-buffer window. */
5087 && FRAME_HAS_MINIBUF_P (f
)
5088 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5090 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5093 if (cursor_in_echo_area
< 0)
5095 /* Negative value of cursor_in_echo_area means put
5096 cursor at beginning of line. */
5102 /* Positive value of cursor_in_echo_area means put
5103 cursor at the end of the prompt. If the mini-buffer
5104 is several lines high, find the last line that has
5106 row
= FRAME_HEIGHT (f
);
5112 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5114 /* Frame rows are filled up with spaces that
5115 must be ignored here. */
5116 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5118 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5119 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5122 && (last
- 1)->charpos
< 0)
5128 while (row
> top
&& col
== 0);
5130 /* Make sure COL is not out of range. */
5131 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5133 /* If we have another row, advance cursor into it. */
5134 if (row
< FRAME_HEIGHT (f
) - 1)
5136 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5139 /* Otherwise move it back in range. */
5141 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5145 cursor_to (row
, col
);
5149 /* We have only one cursor on terminal frames. Use it to
5150 display the cursor of the selected window. */
5151 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5152 if (w
->cursor
.vpos
>= 0
5153 /* The cursor vpos may be temporarily out of bounds
5154 in the following situation: There is one window,
5155 with the cursor in the lower half of it. The window
5156 is split, and a message causes a redisplay before
5157 a new cursor position has been computed. */
5158 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5160 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5161 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5163 if (INTEGERP (w
->left_margin_width
))
5164 x
+= XFASTINT (w
->left_margin_width
);
5166 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5174 clear_desired_matrices (f
);
5179 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5183 struct frame
*frame
;
5185 int unchanged_at_top
, unchanged_at_bottom
;
5188 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5189 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5190 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5191 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5193 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5194 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5195 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5197 if (!current_matrix
)
5200 /* Compute hash codes of all the lines. Also calculate number of
5201 changed lines, number of unchanged lines at the beginning, and
5202 number of unchanged lines at the end. */
5204 unchanged_at_top
= 0;
5205 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5206 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5208 /* Give up on this scrolling if some old lines are not enabled. */
5209 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5211 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5212 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5214 /* This line cannot be redrawn, so don't let scrolling mess it. */
5215 new_hash
[i
] = old_hash
[i
];
5216 #define INFINITY 1000000 /* Taken from scroll.c */
5217 draw_cost
[i
] = INFINITY
;
5221 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5222 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5225 if (old_hash
[i
] != new_hash
[i
])
5228 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5230 else if (i
== unchanged_at_top
)
5232 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5235 /* If changed lines are few, don't allow preemption, don't scroll. */
5236 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5237 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5240 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5241 - unchanged_at_bottom
);
5243 if (scroll_region_ok
)
5244 free_at_end_vpos
-= unchanged_at_bottom
;
5245 else if (memory_below_frame
)
5246 free_at_end_vpos
= -1;
5248 /* If large window, fast terminal and few lines in common between
5249 current frame and desired frame, don't bother with i/d calc. */
5250 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5252 10 * scrolling_max_lines_saved (unchanged_at_top
,
5253 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5254 old_hash
, new_hash
, draw_cost
)))
5257 if (window_size
< 2)
5260 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5261 draw_cost
+ unchanged_at_top
- 1,
5262 old_draw_cost
+ unchanged_at_top
- 1,
5263 old_hash
+ unchanged_at_top
- 1,
5264 new_hash
+ unchanged_at_top
- 1,
5265 free_at_end_vpos
- unchanged_at_top
);
5271 /* Count the number of blanks at the start of the vector of glyphs R
5272 which is LEN glyphs long. */
5275 count_blanks (r
, len
)
5281 for (i
= 0; i
< len
; ++i
)
5282 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5289 /* Count the number of glyphs in common at the start of the glyph
5290 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5291 of STR2. Value is the number of equal glyphs equal at the start. */
5294 count_match (str1
, end1
, str2
, end2
)
5295 struct glyph
*str1
, *end1
, *str2
, *end2
;
5297 struct glyph
*p1
= str1
;
5298 struct glyph
*p2
= str2
;
5302 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5309 /* Char insertion/deletion cost vector, from term.c */
5311 extern int *char_ins_del_vector
;
5312 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5315 /* Perform a frame-based update on line VPOS in frame FRAME. */
5318 update_frame_line (frame
, vpos
)
5319 register struct frame
*frame
;
5322 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5324 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5325 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5326 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5327 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5328 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5329 int must_write_whole_line_p
;
5330 int write_spaces_p
= must_write_spaces
;
5331 int colored_spaces_p
= (FACE_FROM_ID (frame
, DEFAULT_FACE_ID
)->background
5332 != FACE_TTY_DEFAULT_BG_COLOR
);
5334 if (colored_spaces_p
)
5337 if (desired_row
->inverse_p
5338 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5340 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5341 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5342 current_row
->enabled_p
= 0;
5345 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5347 /* Current row not enabled means it has unknown contents. We must
5348 write the whole desired line in that case. */
5349 must_write_whole_line_p
= !current_row
->enabled_p
;
5350 if (must_write_whole_line_p
)
5357 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5358 olen
= current_row
->used
[TEXT_AREA
];
5360 if (!current_row
->inverse_p
)
5362 /* Ignore trailing spaces, if we can. */
5363 if (!write_spaces_p
)
5364 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5369 /* For an inverse-video line, make sure it's filled with
5370 spaces all the way to the frame edge so that the reverse
5371 video extends all the way across. */
5372 while (olen
< FRAME_WIDTH (frame
) - 1)
5373 obody
[olen
++] = space_glyph
;
5377 current_row
->enabled_p
= 1;
5378 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5379 current_row
->inverse_p
= desired_row
->inverse_p
;
5381 /* If desired line is empty, just clear the line. */
5382 if (!desired_row
->enabled_p
)
5388 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5389 nlen
= desired_row
->used
[TEXT_AREA
];
5390 nend
= nbody
+ nlen
;
5392 /* If display line has unknown contents, write the whole line. */
5393 if (must_write_whole_line_p
)
5395 /* Ignore spaces at the end, if we can. */
5396 if (!write_spaces_p
)
5397 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5400 /* Write the contents of the desired line. */
5403 cursor_to (vpos
, 0);
5404 write_glyphs (nbody
, nlen
);
5407 /* Don't call clear_end_of_line if we already wrote the whole
5408 line. The cursor will not be at the right margin in that
5409 case but in the line below. */
5410 if (nlen
< FRAME_WINDOW_WIDTH (frame
))
5412 cursor_to (vpos
, nlen
);
5413 clear_end_of_line (FRAME_WINDOW_WIDTH (frame
));
5416 /* Make sure we are in the right row, otherwise cursor movement
5417 with cmgoto might use `ch' in the wrong row. */
5418 cursor_to (vpos
, 0);
5420 make_current (desired_matrix
, current_matrix
, vpos
);
5424 /* Pretend trailing spaces are not there at all,
5425 unless for one reason or another we must write all spaces. */
5426 if (!desired_row
->inverse_p
)
5428 if (!write_spaces_p
)
5429 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5434 /* For an inverse-video line, give it extra trailing spaces all
5435 the way to the frame edge so that the reverse video extends
5436 all the way across. */
5437 while (nlen
< FRAME_WIDTH (frame
) - 1)
5438 nbody
[nlen
++] = space_glyph
;
5441 /* If there's no i/d char, quickly do the best we can without it. */
5442 if (!char_ins_del_ok
)
5446 /* Find the first glyph in desired row that doesn't agree with
5447 a glyph in the current row, and write the rest from there on. */
5448 for (i
= 0; i
< nlen
; i
++)
5450 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5452 /* Find the end of the run of different glyphs. */
5456 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5457 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5460 /* Output this run of non-matching chars. */
5461 cursor_to (vpos
, i
);
5462 write_glyphs (nbody
+ i
, j
- i
);
5465 /* Now find the next non-match. */
5469 /* Clear the rest of the line, or the non-clear part of it. */
5472 cursor_to (vpos
, nlen
);
5473 clear_end_of_line (olen
);
5476 /* Make current row = desired row. */
5477 make_current (desired_matrix
, current_matrix
, vpos
);
5481 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5482 characters in a row. */
5486 /* If current line is blank, skip over initial spaces, if
5487 possible, and write the rest. */
5488 if (write_spaces_p
|| desired_row
->inverse_p
)
5491 nsp
= count_blanks (nbody
, nlen
);
5495 cursor_to (vpos
, nsp
);
5496 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5499 /* Exchange contents between current_frame and new_frame. */
5500 make_current (desired_matrix
, current_matrix
, vpos
);
5504 /* Compute number of leading blanks in old and new contents. */
5505 osp
= count_blanks (obody
, olen
);
5506 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5508 : count_blanks (nbody
, nlen
));
5510 /* Compute number of matching chars starting with first non-blank. */
5511 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5512 nbody
+ nsp
, nbody
+ nlen
);
5514 /* Spaces in new match implicit space past the end of old. */
5515 /* A bug causing this to be a no-op was fixed in 18.29. */
5516 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5519 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5523 /* Avoid doing insert/delete char
5524 just cause number of leading spaces differs
5525 when the following text does not match. */
5526 if (begmatch
== 0 && osp
!= nsp
)
5527 osp
= nsp
= min (osp
, nsp
);
5529 /* Find matching characters at end of line */
5532 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5534 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5539 endmatch
= obody
+ olen
- op1
;
5541 /* tem gets the distance to insert or delete.
5542 endmatch is how many characters we save by doing so.
5545 tem
= (nlen
- nsp
) - (olen
- osp
);
5547 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
5550 /* nsp - osp is the distance to insert or delete.
5551 If that is nonzero, begmatch is known to be nonzero also.
5552 begmatch + endmatch is how much we save by doing the ins/del.
5556 && (!char_ins_del_ok
5557 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
5561 osp
= nsp
= min (osp
, nsp
);
5564 /* Now go through the line, inserting, writing and
5565 deleting as appropriate. */
5569 cursor_to (vpos
, nsp
);
5570 delete_glyphs (osp
- nsp
);
5574 /* If going to delete chars later in line
5575 and insert earlier in the line,
5576 must delete first to avoid losing data in the insert */
5577 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5579 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5580 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5581 olen
= nlen
- (nsp
- osp
);
5583 cursor_to (vpos
, osp
);
5584 insert_glyphs (0, nsp
- osp
);
5588 tem
= nsp
+ begmatch
+ endmatch
;
5589 if (nlen
!= tem
|| olen
!= tem
)
5591 cursor_to (vpos
, nsp
+ begmatch
);
5592 if (!endmatch
|| nlen
== olen
)
5594 /* If new text being written reaches right margin,
5595 there is no need to do clear-to-eol at the end.
5596 (and it would not be safe, since cursor is not
5597 going to be "at the margin" after the text is done) */
5598 if (nlen
== FRAME_WINDOW_WIDTH (frame
))
5600 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5602 else if (nlen
> olen
)
5604 /* Here, we used to have the following simple code:
5605 ----------------------------------------
5606 write_glyphs (nbody + nsp + begmatch, olen - tem);
5607 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5608 ----------------------------------------
5609 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5610 is a padding glyph. */
5611 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5614 /* Calculate columns we can actually overwrite. */
5615 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
])) out
--;
5616 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5617 /* If we left columns to be overwritten, we must delete them. */
5618 del
= olen
- tem
- out
;
5619 if (del
> 0) delete_glyphs (del
);
5620 /* At last, we insert columns not yet written out. */
5621 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5624 else if (olen
> nlen
)
5626 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5627 delete_glyphs (olen
- nlen
);
5633 /* If any unerased characters remain after the new line, erase them. */
5636 cursor_to (vpos
, nlen
);
5637 clear_end_of_line (olen
);
5640 /* Exchange contents between current_frame and new_frame. */
5641 make_current (desired_matrix
, current_matrix
, vpos
);
5646 /***********************************************************************
5647 X/Y Position -> Buffer Position
5648 ***********************************************************************/
5650 /* Return the character position of the character at window relative
5651 pixel position (*X, *Y). *X and *Y are adjusted to character
5655 buffer_posn_from_coords (w
, x
, y
)
5660 struct buffer
*old_current_buffer
= current_buffer
;
5661 struct text_pos startp
;
5662 int left_area_width
;
5664 current_buffer
= XBUFFER (w
->buffer
);
5665 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5666 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5667 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5668 start_display (&it
, w
, startp
);
5670 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5671 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5672 MOVE_TO_X
| MOVE_TO_Y
);
5674 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5676 current_buffer
= old_current_buffer
;
5677 return IT_CHARPOS (it
);
5681 /* Value is the string under window-relative coordinates X/Y in the
5682 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5683 means look at the mode line. *CHARPOS is set to the position in
5684 the string returned. */
5687 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5689 int x
, y
, mode_line_p
;
5692 struct glyph_row
*row
;
5693 struct glyph
*glyph
, *end
;
5694 struct frame
*f
= XFRAME (w
->frame
);
5696 Lisp_Object string
= Qnil
;
5699 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5701 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5703 if (row
->mode_line_p
&& row
->enabled_p
)
5705 /* The mode lines are displayed over scroll bars and bitmap
5706 areas, and X is window-relative. Correct X by the scroll bar
5707 and bitmap area width. */
5708 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5709 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5710 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5712 /* Find the glyph under X. If we find one with a string object,
5713 it's the one we were looking for. */
5714 glyph
= row
->glyphs
[TEXT_AREA
];
5715 end
= glyph
+ row
->used
[TEXT_AREA
];
5716 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5717 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5719 string
= glyph
->object
;
5720 *charpos
= glyph
->charpos
;
5729 /***********************************************************************
5730 Changing Frame Sizes
5731 ***********************************************************************/
5736 window_change_signal (signalnum
) /* If we don't have an argument, */
5737 int signalnum
; /* some compilers complain in signal calls. */
5743 int old_errno
= errno
;
5745 get_frame_size (&width
, &height
);
5747 /* The frame size change obviously applies to a termcap-controlled
5748 frame. Find such a frame in the list, and assume it's the only
5749 one (since the redisplay code always writes to stdout, not a
5750 FILE * specified in the frame structure). Record the new size,
5751 but don't reallocate the data structures now. Let that be done
5752 later outside of the signal handler. */
5755 Lisp_Object tail
, frame
;
5757 FOR_EACH_FRAME (tail
, frame
)
5759 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5761 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5767 signal (SIGWINCH
, window_change_signal
);
5770 #endif /* SIGWINCH */
5773 /* Do any change in frame size that was requested by a signal. SAFE
5774 non-zero means this function is called from a place where it is
5775 safe to change frame sizes while a redisplay is in progress. */
5778 do_pending_window_change (safe
)
5781 /* If window_change_signal should have run before, run it now. */
5782 if (redisplaying_p
&& !safe
)
5785 while (delayed_size_change
)
5787 Lisp_Object tail
, frame
;
5789 delayed_size_change
= 0;
5791 FOR_EACH_FRAME (tail
, frame
)
5793 struct frame
*f
= XFRAME (frame
);
5795 int height
= FRAME_NEW_HEIGHT (f
);
5796 int width
= FRAME_NEW_WIDTH (f
);
5798 if (height
!= 0 || width
!= 0)
5799 change_frame_size (f
, height
, width
, 0, 0, safe
);
5805 /* Change the frame height and/or width. Values may be given as zero to
5806 indicate no change is to take place.
5808 If DELAY is non-zero, then assume we're being called from a signal
5809 handler, and queue the change for later - perhaps the next
5810 redisplay. Since this tries to resize windows, we can't call it
5811 from a signal handler.
5813 SAFE non-zero means this function is called from a place where it's
5814 safe to change frame sizes while a redisplay is in progress. */
5817 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5818 register struct frame
*f
;
5819 int newheight
, newwidth
, pretend
, delay
, safe
;
5821 Lisp_Object tail
, frame
;
5823 if (! FRAME_WINDOW_P (f
))
5825 /* When using termcap, or on MS-DOS, all frames use
5826 the same screen, so a change in size affects all frames. */
5827 FOR_EACH_FRAME (tail
, frame
)
5828 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5829 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5830 pretend
, delay
, safe
);
5833 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5837 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5838 register struct frame
*f
;
5839 int newheight
, newwidth
, pretend
, delay
, safe
;
5841 int new_frame_window_width
;
5842 int count
= specpdl_ptr
- specpdl
;
5844 /* If we can't deal with the change now, queue it for later. */
5845 if (delay
|| (redisplaying_p
&& !safe
))
5847 FRAME_NEW_HEIGHT (f
) = newheight
;
5848 FRAME_NEW_WIDTH (f
) = newwidth
;
5849 delayed_size_change
= 1;
5853 /* This size-change overrides any pending one for this frame. */
5854 FRAME_NEW_HEIGHT (f
) = 0;
5855 FRAME_NEW_WIDTH (f
) = 0;
5857 /* If an argument is zero, set it to the current value. */
5859 newheight
= FRAME_HEIGHT (f
);
5861 newwidth
= FRAME_WIDTH (f
);
5863 /* Compute width of windows in F.
5864 This is the width of the frame without vertical scroll bars. */
5865 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5867 /* Round up to the smallest acceptable size. */
5868 check_frame_size (f
, &newheight
, &newwidth
);
5870 /* If we're not changing the frame size, quit now. */
5871 if (newheight
== FRAME_HEIGHT (f
)
5872 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5878 /* We only can set screen dimensions to certain values supported
5879 by our video hardware. Try to find the smallest size greater
5880 or equal to the requested dimensions. */
5881 dos_set_window_size (&newheight
, &newwidth
);
5884 if (newheight
!= FRAME_HEIGHT (f
))
5886 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5888 /* Frame has both root and mini-buffer. */
5889 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5890 FRAME_TOP_MARGIN (f
));
5891 set_window_height (FRAME_ROOT_WINDOW (f
),
5894 - FRAME_TOP_MARGIN (f
)),
5896 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5898 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5901 /* Frame has just one top-level window. */
5902 set_window_height (FRAME_ROOT_WINDOW (f
),
5903 newheight
- FRAME_TOP_MARGIN (f
), 0);
5905 if (FRAME_TERMCAP_P (f
) && !pretend
)
5906 FrameRows
= newheight
;
5909 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5911 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5912 if (FRAME_HAS_MINIBUF_P (f
))
5913 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5915 if (FRAME_TERMCAP_P (f
) && !pretend
)
5916 FrameCols
= newwidth
;
5918 if (WINDOWP (f
->tool_bar_window
))
5919 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5922 FRAME_HEIGHT (f
) = newheight
;
5923 SET_FRAME_WIDTH (f
, newwidth
);
5926 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5927 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5929 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5931 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5932 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5933 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5934 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5938 SET_FRAME_GARBAGED (f
);
5939 calculate_costs (f
);
5943 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5945 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5946 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5947 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5949 unbind_to (count
, Qnil
);
5954 /***********************************************************************
5955 Terminal Related Lisp Functions
5956 ***********************************************************************/
5958 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5959 1, 1, "FOpen termscript file: ",
5960 "Start writing all terminal output to FILE as well as the terminal.\n\
5961 FILE = nil means just close any termscript file currently open.")
5965 if (termscript
!= 0) fclose (termscript
);
5970 file
= Fexpand_file_name (file
, Qnil
);
5971 termscript
= fopen (XSTRING (file
)->data
, "w");
5972 if (termscript
== 0)
5973 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5979 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5980 Ssend_string_to_terminal
, 1, 1, 0,
5981 "Send STRING to the terminal without alteration.\n\
5982 Control characters in STRING will have terminal-dependent effects.")
5986 /* ??? Perhaps we should do something special for multibyte strings here. */
5987 CHECK_STRING (string
, 0);
5988 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
5992 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
5994 fflush (termscript
);
6000 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6001 "Beep, or flash the screen.\n\
6002 Also, unless an argument is given,\n\
6003 terminate any keyboard macro currently executing.")
6026 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6027 error ("Keyboard macro terminated by a command ringing the bell");
6035 /***********************************************************************
6037 ***********************************************************************/
6039 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6040 "Pause, without updating display, for SECONDS seconds.\n\
6041 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6042 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6043 additional wait period, in milliseconds; this may be useful if your\n\
6044 Emacs was built without floating point support.\n\
6045 \(Not all operating systems support waiting for a fraction of a second.)")
6046 (seconds
, milliseconds
)
6047 Lisp_Object seconds
, milliseconds
;
6051 if (NILP (milliseconds
))
6052 XSETINT (milliseconds
, 0);
6054 CHECK_NUMBER (milliseconds
, 1);
6055 usec
= XINT (milliseconds
) * 1000;
6058 double duration
= extract_float (seconds
);
6059 sec
= (int) duration
;
6060 usec
+= (duration
- sec
) * 1000000;
6063 #ifndef EMACS_HAS_USECS
6064 if (sec
== 0 && usec
!= 0)
6065 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6068 /* Assure that 0 <= usec < 1000000. */
6071 /* We can't rely on the rounding being correct if user is negative. */
6072 if (-1000000 < usec
)
6073 sec
--, usec
+= 1000000;
6075 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6078 sec
+= usec
/ 1000000, usec
%= 1000000;
6080 if (sec
< 0 || (sec
== 0 && usec
== 0))
6086 XSETFASTINT (zero
, 0);
6087 wait_reading_process_input (sec
, usec
, zero
, 0);
6090 /* We should always have wait_reading_process_input; we have a dummy
6091 implementation for systems which don't support subprocesses. */
6093 /* No wait_reading_process_input */
6100 /* The reason this is done this way
6101 (rather than defined (H_S) && defined (H_T))
6102 is because the VMS preprocessor doesn't grok `defined' */
6104 EMACS_GET_TIME (end_time
);
6105 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6106 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6110 EMACS_GET_TIME (timeout
);
6111 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6112 if (EMACS_TIME_NEG_P (timeout
)
6113 || !select (1, 0, 0, 0, &timeout
))
6116 #else /* not HAVE_SELECT */
6118 #endif /* HAVE_SELECT */
6119 #endif /* not VMS */
6122 #endif /* no subprocesses */
6128 /* This is just like wait_reading_process_input, except that
6129 it does the redisplay.
6131 It's also much like Fsit_for, except that it can be used for
6132 waiting for input as well. */
6135 sit_for (sec
, usec
, reading
, display
, initial_display
)
6136 int sec
, usec
, reading
, display
, initial_display
;
6138 Lisp_Object read_kbd
;
6140 swallow_events (display
);
6142 if (detect_input_pending_run_timers (display
))
6145 if (initial_display
)
6146 redisplay_preserve_echo_area (2);
6148 if (sec
== 0 && usec
== 0)
6155 XSETINT (read_kbd
, reading
? -1 : 1);
6156 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6158 return detect_input_pending () ? Qnil
: Qt
;
6162 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6163 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
6164 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6165 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6166 additional wait period, in milliseconds; this may be useful if your\n\
6167 Emacs was built without floating point support.\n\
6168 \(Not all operating systems support waiting for a fraction of a second.)\n\
6169 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
6170 Redisplay is preempted as always if input arrives, and does not happen\n\
6171 if input is available before it starts.\n\
6172 Value is t if waited the full time with no input arriving.")
6173 (seconds
, milliseconds
, nodisp
)
6174 Lisp_Object seconds
, milliseconds
, nodisp
;
6178 if (NILP (milliseconds
))
6179 XSETINT (milliseconds
, 0);
6181 CHECK_NUMBER (milliseconds
, 1);
6182 usec
= XINT (milliseconds
) * 1000;
6185 double duration
= extract_float (seconds
);
6186 sec
= (int) duration
;
6187 usec
+= (duration
- sec
) * 1000000;
6190 #ifndef EMACS_HAS_USECS
6191 if (usec
!= 0 && sec
== 0)
6192 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6195 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6200 /***********************************************************************
6201 Other Lisp Functions
6202 ***********************************************************************/
6204 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6205 session's frames, frame names, buffers, buffer-read-only flags, and
6206 buffer-modified-flags, and a trailing sentinel (so we don't need to
6207 add length checks). */
6209 static Lisp_Object frame_and_buffer_state
;
6212 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6213 Sframe_or_buffer_changed_p
, 0, 0, 0,
6214 "Return non-nil if the frame and buffer state appears to have changed.\n\
6215 The state variable is an internal vector containing all frames and buffers,\n\
6216 aside from buffers whose names start with space,\n\
6217 along with the buffers' read-only and modified flags, which allows a fast\n\
6218 check to see whether the menu bars might need to be recomputed.\n\
6219 If this function returns non-nil, it updates the internal vector to reflect\n\
6220 the current state.\n")
6223 Lisp_Object tail
, frame
, buf
;
6227 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6228 FOR_EACH_FRAME (tail
, frame
)
6230 if (!EQ (*vecp
++, frame
))
6232 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6235 /* Check that the buffer info matches.
6236 No need to test for the end of the vector
6237 because the last element of the vector is lambda
6238 and that will always cause a mismatch. */
6239 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6241 buf
= XCDR (XCAR (tail
));
6242 /* Ignore buffers that aren't included in buffer lists. */
6243 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6245 if (!EQ (*vecp
++, buf
))
6247 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6249 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6252 /* Detect deletion of a buffer at the end of the list. */
6253 if (EQ (*vecp
, Qlambda
))
6256 /* Start with 1 so there is room for at least one lambda at the end. */
6258 FOR_EACH_FRAME (tail
, frame
)
6260 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6262 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6263 if (n
> XVECTOR (frame_and_buffer_state
)->size
6264 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6265 /* Add 20 extra so we grow it less often. */
6266 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6267 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6268 FOR_EACH_FRAME (tail
, frame
)
6271 *vecp
++ = XFRAME (frame
)->name
;
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] == ' ')
6280 *vecp
++ = XBUFFER (buf
)->read_only
;
6281 *vecp
++ = Fbuffer_modified_p (buf
);
6283 /* Fill up the vector with lambdas (always at least one). */
6285 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6286 < XVECTOR (frame_and_buffer_state
)->size
)
6288 /* Make sure we didn't overflow the vector. */
6289 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6290 > XVECTOR (frame_and_buffer_state
)->size
)
6297 /***********************************************************************
6299 ***********************************************************************/
6301 char *terminal_type
;
6303 /* Initialization done when Emacs fork is started, before doing stty.
6304 Determine terminal type and set terminal_driver. Then invoke its
6305 decoding routine to set up variables in the terminal package. */
6310 #ifdef HAVE_X_WINDOWS
6311 extern int display_arg
;
6314 /* Construct the space glyph. */
6315 space_glyph
.type
= CHAR_GLYPH
;
6316 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6317 space_glyph
.charpos
= -1;
6321 cursor_in_echo_area
= 0;
6322 terminal_type
= (char *) 0;
6324 /* Now is the time to initialize this; it's used by init_sys_modes
6326 Vwindow_system
= Qnil
;
6328 /* If the user wants to use a window system, we shouldn't bother
6329 initializing the terminal. This is especially important when the
6330 terminal is so dumb that emacs gives up before and doesn't bother
6331 using the window system.
6333 If the DISPLAY environment variable is set and nonempty,
6334 try to use X, and die with an error message if that doesn't work. */
6336 #ifdef HAVE_X_WINDOWS
6341 display
= getenv ("DECW$DISPLAY");
6343 display
= getenv ("DISPLAY");
6346 display_arg
= (display
!= 0 && *display
!= 0);
6349 if (!inhibit_window_system
&& display_arg
6355 Vwindow_system
= intern ("x");
6357 Vwindow_system_version
= make_number (11);
6359 Vwindow_system_version
= make_number (10);
6361 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6362 /* In some versions of ncurses,
6363 tputs crashes if we have not called tgetent.
6365 { char b
[2044]; tgetent (b
, "xterm");}
6367 adjust_frame_glyphs_initially ();
6370 #endif /* HAVE_X_WINDOWS */
6373 if (!inhibit_window_system
)
6375 Vwindow_system
= intern ("w32");
6376 Vwindow_system_version
= make_number (1);
6377 adjust_frame_glyphs_initially ();
6380 #endif /* HAVE_NTGUI */
6383 if (!inhibit_window_system
)
6385 Vwindow_system
= intern ("mac");
6386 Vwindow_system_version
= make_number (1);
6387 adjust_frame_glyphs_initially ();
6390 #endif /* macintosh */
6392 /* If no window system has been specified, try to use the terminal. */
6395 fatal ("standard input is not a tty");
6399 /* Look at the TERM variable */
6400 terminal_type
= (char *) getenv ("TERM");
6404 fprintf (stderr
, "Please specify your terminal type.\n\
6405 For types defined in VMS, use set term /device=TYPE.\n\
6406 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6407 \(The quotation marks are necessary since terminal types are lower case.)\n");
6409 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6415 /* VMS DCL tends to up-case things, so down-case term type.
6416 Hardly any uppercase letters in terminal types; should be none. */
6418 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6421 strcpy (new, terminal_type
);
6423 for (p
= new; *p
; p
++)
6427 terminal_type
= new;
6431 term_init (terminal_type
);
6434 struct frame
*sf
= SELECTED_FRAME ();
6435 int width
= FRAME_WINDOW_WIDTH (sf
);
6436 int height
= FRAME_HEIGHT (sf
);
6438 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6440 /* If these sizes are so big they cause overflow, just ignore the
6441 change. It's not clear what better we could do. */
6442 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6443 fatal ("screen size %dx%d too big", width
, height
);
6446 adjust_frame_glyphs_initially ();
6447 calculate_costs (XFRAME (selected_frame
));
6452 #endif /* CANNOT_DUMP */
6453 signal (SIGWINCH
, window_change_signal
);
6454 #endif /* SIGWINCH */
6456 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6460 /* The MSDOS terminal turns on its ``window system'' relatively
6461 late into the startup, so we cannot do the frame faces'
6462 initialization just yet. It will be done later by pc-win.el
6463 and internal_terminal_init. */
6464 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6466 && NILP (Vwindow_system
))
6468 /* For the initial frame, we don't have any way of knowing what
6469 are the foreground and background colors of the terminal. */
6470 struct frame
*sf
= SELECTED_FRAME();
6472 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6473 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6474 call0 (intern ("tty-set-up-initial-frame-faces"));
6480 /***********************************************************************
6482 ***********************************************************************/
6484 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6485 Sinternal_show_cursor
, 2, 2, 0,
6486 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6487 WINDOW nil means use the selected window. SHOW non-nil means\n\
6488 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6489 don't show a cursor.")
6491 Lisp_Object window
, show
;
6493 /* Don't change cursor state while redisplaying. This could confuse
6495 if (!redisplaying_p
)
6498 window
= selected_window
;
6500 CHECK_WINDOW (window
, 2);
6502 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6509 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6510 Sinternal_show_cursor_p
, 0, 1, 0,
6511 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6512 WINDOW nil or omitted means report on the selected window.")
6519 window
= selected_window
;
6521 CHECK_WINDOW (window
, 2);
6523 w
= XWINDOW (window
);
6524 return w
->cursor_off_p
? Qnil
: Qt
;
6528 /***********************************************************************
6530 ***********************************************************************/
6535 defsubr (&Sredraw_frame
);
6536 defsubr (&Sredraw_display
);
6537 defsubr (&Sframe_or_buffer_changed_p
);
6538 defsubr (&Sopen_termscript
);
6540 defsubr (&Ssit_for
);
6541 defsubr (&Ssleep_for
);
6542 defsubr (&Ssend_string_to_terminal
);
6543 defsubr (&Sinternal_show_cursor
);
6544 defsubr (&Sinternal_show_cursor_p
);
6547 defsubr (&Sdump_redisplay_history
);
6550 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6551 staticpro (&frame_and_buffer_state
);
6553 Qdisplay_table
= intern ("display-table");
6554 staticpro (&Qdisplay_table
);
6555 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6556 staticpro (&Qredisplay_dont_pause
);
6558 DEFVAR_INT ("baud-rate", &baud_rate
,
6559 "*The output baud rate of the terminal.\n\
6560 On most systems, changing this value will affect the amount of padding\n\
6561 and the other strategic decisions made during redisplay.");
6563 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6564 "*Non-nil means invert the entire frame display.\n\
6565 This means everything is in inverse video which otherwise would not be.");
6567 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6568 "*Non-nil means try to flash the frame to represent a bell.");
6570 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6571 "*Non-nil means no need to redraw entire frame after suspending.\n\
6572 A non-nil value is useful if the terminal can automatically preserve\n\
6573 Emacs's frame display when you reenter Emacs.\n\
6574 It is up to you to set this variable if your terminal can do that.");
6576 DEFVAR_LISP ("window-system", &Vwindow_system
,
6577 "A symbol naming the window-system under which Emacs is running\n\
6578 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6580 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6581 "The version number of the window system in use.\n\
6582 For X windows, this is 10 or 11.");
6584 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6585 "Non-nil means put cursor in minibuffer, at end of any message there.");
6587 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6588 "Table defining how to output a glyph code to the frame.\n\
6589 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6590 Each element can be:\n\
6591 integer: a glyph code which this glyph is an alias for.\n\
6592 string: output this glyph using that string (not impl. in X windows).\n\
6593 nil: this glyph mod 256 is char code to output,\n\
6594 and this glyph / 256 is face code for X windows (see `face-id').");
6595 Vglyph_table
= Qnil
;
6597 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6598 "Display table to use for buffers that specify none.\n\
6599 See `buffer-display-table' for more information.");
6600 Vstandard_display_table
= Qnil
;
6602 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6603 "*Non-nil means update isn't paused when input is detected.");
6604 redisplay_dont_pause
= 0;
6606 /* Initialize `window-system', unless init_display already decided it. */
6611 Vwindow_system
= Qnil
;
6612 Vwindow_system_version
= Qnil
;