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);
780 if (matrix
== w
->current_matrix
)
782 /* Mark rows in a current matrix of a window as not having
783 valid contents. It's important to not do this for
784 desired matrices. When Emacs starts, it may already be
785 building desired matrices when this function runs. */
786 if (window_width
< 0)
787 window_width
= window_box_width (w
, -1);
789 /* Optimize the case that only the height has changed (C-x 2,
790 upper window). Invalidate all rows that are no longer part
792 if (!marginal_areas_changed_p
793 && matrix
->window_left_x
== XFASTINT (w
->left
)
794 && matrix
->window_top_y
== XFASTINT (w
->top
)
795 && matrix
->window_width
== window_box_width (w
, -1))
798 while (matrix
->rows
[i
].enabled_p
799 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
800 < matrix
->window_height
))
803 /* Window end is invalid, if inside of the rows that
805 if (INTEGERP (w
->window_end_vpos
)
806 && XFASTINT (w
->window_end_vpos
) >= i
)
807 w
->window_end_valid
= Qnil
;
809 while (i
< matrix
->nrows
)
810 matrix
->rows
[i
++].enabled_p
= 0;
814 for (i
= 0; i
< matrix
->nrows
; ++i
)
815 matrix
->rows
[i
].enabled_p
= 0;
818 else if (matrix
== w
->desired_matrix
)
820 /* Rows in desired matrices always have to be cleared;
821 redisplay expects this is the case when it runs, so it
822 had better be the case when we adjust matrices between
824 for (i
= 0; i
< matrix
->nrows
; ++i
)
825 matrix
->rows
[i
].enabled_p
= 0;
830 /* Remember last values to be able to optimize frame redraws. */
831 matrix
->matrix_x
= x
;
832 matrix
->matrix_y
= y
;
833 matrix
->matrix_w
= dim
.width
;
834 matrix
->matrix_h
= dim
.height
;
836 /* Record the top y location and height of W at the time the matrix
837 was last adjusted. This is used to optimize redisplay above. */
840 matrix
->window_left_x
= XFASTINT (w
->left
);
841 matrix
->window_top_y
= XFASTINT (w
->top
);
842 matrix
->window_height
= window_height
;
843 matrix
->window_width
= window_width
;
844 matrix
->window_vscroll
= w
->vscroll
;
849 /* Reverse the contents of rows in MATRIX between START and END. The
850 contents of the row at END - 1 end up at START, END - 2 at START +
851 1 etc. This is part of the implementation of rotate_matrix (see
855 reverse_rows (matrix
, start
, end
)
856 struct glyph_matrix
*matrix
;
861 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
863 /* Non-ISO HP/UX compiler doesn't like auto struct
865 struct glyph_row temp
;
866 temp
= matrix
->rows
[i
];
867 matrix
->rows
[i
] = matrix
->rows
[j
];
868 matrix
->rows
[j
] = temp
;
873 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
874 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
875 indices. (Note: this does not copy glyphs, only glyph pointers in
876 row structures are moved around).
878 The algorithm used for rotating the vector was, I believe, first
879 described by Kernighan. See the vector R as consisting of two
880 sub-vectors AB, where A has length BY for BY >= 0. The result
881 after rotating is then BA. Reverse both sub-vectors to get ArBr
882 and reverse the result to get (ArBr)r which is BA. Similar for
886 rotate_matrix (matrix
, first
, last
, by
)
887 struct glyph_matrix
*matrix
;
892 /* Up (rotate left, i.e. towards lower indices). */
894 reverse_rows (matrix
, first
, first
+ by
);
895 reverse_rows (matrix
, first
+ by
, last
);
896 reverse_rows (matrix
, first
, last
);
900 /* Down (rotate right, i.e. towards higher indices). */
901 reverse_rows (matrix
, last
- by
, last
);
902 reverse_rows (matrix
, first
, last
- by
);
903 reverse_rows (matrix
, first
, last
);
908 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
909 with indices START <= index < END. Increment positions by DELTA/
913 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
914 struct glyph_matrix
*matrix
;
915 int start
, end
, delta
, delta_bytes
;
917 /* Check that START and END are reasonable values. */
918 xassert (start
>= 0 && start
<= matrix
->nrows
);
919 xassert (end
>= 0 && end
<= matrix
->nrows
);
920 xassert (start
<= end
);
922 for (; start
< end
; ++start
)
923 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
927 /* Enable a range of rows in glyph matrix MATRIX. START and END are
928 the row indices of the first and last + 1 row to enable. If
929 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
932 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
933 struct glyph_matrix
*matrix
;
937 xassert (start
<= end
);
938 xassert (start
>= 0 && start
< matrix
->nrows
);
939 xassert (end
>= 0 && end
<= matrix
->nrows
);
941 for (; start
< end
; ++start
)
942 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
948 This empties all rows in MATRIX by setting the enabled_p flag for
949 all rows of the matrix to zero. The function prepare_desired_row
950 will eventually really clear a row when it sees one with a zero
953 Resets update hints to defaults value. The only update hint
954 currently present is the flag MATRIX->no_scrolling_p. */
957 clear_glyph_matrix (matrix
)
958 struct glyph_matrix
*matrix
;
962 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
963 matrix
->no_scrolling_p
= 0;
968 /* Shift part of the glyph matrix MATRIX of window W up or down.
969 Increment y-positions in glyph rows between START and END by DY,
970 and recompute their visible height. */
973 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
975 struct glyph_matrix
*matrix
;
980 xassert (start
<= end
);
981 xassert (start
>= 0 && start
< matrix
->nrows
);
982 xassert (end
>= 0 && end
<= matrix
->nrows
);
984 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
985 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
987 for (; start
< end
; ++start
)
989 struct glyph_row
*row
= &matrix
->rows
[start
];
994 row
->visible_height
= row
->height
- (min_y
- row
->y
);
995 else if (row
->y
+ row
->height
> max_y
)
996 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
998 row
->visible_height
= row
->height
;
1003 /* Mark all rows in current matrices of frame F as invalid. Marking
1004 invalid is done by setting enabled_p to zero for all rows in a
1008 clear_current_matrices (f
)
1009 register struct frame
*f
;
1011 /* Clear frame current matrix, if we have one. */
1012 if (f
->current_matrix
)
1013 clear_glyph_matrix (f
->current_matrix
);
1015 /* Clear the matrix of the menu bar window, if such a window exists.
1016 The menu bar window is currently used to display menus on X when
1017 no toolkit support is compiled in. */
1018 if (WINDOWP (f
->menu_bar_window
))
1019 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1021 /* Clear the matrix of the tool-bar window, if any. */
1022 if (WINDOWP (f
->tool_bar_window
))
1023 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1025 /* Clear current window matrices. */
1026 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1027 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1031 /* Clear out all display lines of F for a coming redisplay. */
1034 clear_desired_matrices (f
)
1035 register struct frame
*f
;
1037 if (f
->desired_matrix
)
1038 clear_glyph_matrix (f
->desired_matrix
);
1040 if (WINDOWP (f
->menu_bar_window
))
1041 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1043 if (WINDOWP (f
->tool_bar_window
))
1044 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1046 /* Do it for window matrices. */
1047 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1048 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1052 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1053 non-zero clear desired matrices, otherwise clear current matrices. */
1056 clear_window_matrices (w
, desired_p
)
1062 if (!NILP (w
->hchild
))
1064 xassert (WINDOWP (w
->hchild
));
1065 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1067 else if (!NILP (w
->vchild
))
1069 xassert (WINDOWP (w
->vchild
));
1070 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1075 clear_glyph_matrix (w
->desired_matrix
);
1078 clear_glyph_matrix (w
->current_matrix
);
1079 w
->window_end_valid
= Qnil
;
1083 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1089 /***********************************************************************
1092 See dispextern.h for an overall explanation of glyph rows.
1093 ***********************************************************************/
1095 /* Clear glyph row ROW. Do it in a way that makes it robust against
1096 changes in the glyph_row structure, i.e. addition or removal of
1097 structure members. */
1099 static struct glyph_row null_row
;
1102 clear_glyph_row (row
)
1103 struct glyph_row
*row
;
1105 struct glyph
*p
[1 + LAST_AREA
];
1107 /* Save pointers. */
1108 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1109 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1110 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1111 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1116 /* Restore pointers. */
1117 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1118 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1119 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1120 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1122 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1123 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1124 Redisplay outputs such glyphs, and flickering effects were
1125 the result. This also depended on the contents of memory
1126 returned by xmalloc. If flickering happens again, activate
1127 the code below If the flickering is gone with that, chances
1128 are that the flickering has the same reason as here. */
1129 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1134 /* Make ROW an empty, enabled row of canonical character height,
1135 in window W starting at y-position Y. */
1138 blank_row (w
, row
, y
)
1140 struct glyph_row
*row
;
1145 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1146 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1148 clear_glyph_row (row
);
1150 row
->ascent
= row
->phys_ascent
= 0;
1151 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1154 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1155 else if (row
->y
+ row
->height
> max_y
)
1156 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1158 row
->visible_height
= row
->height
;
1164 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1165 are the amounts by which to change positions. Note that the first
1166 glyph of the text area of a row can have a buffer position even if
1167 the used count of the text area is zero. Such rows display line
1171 increment_row_positions (row
, delta
, delta_bytes
)
1172 struct glyph_row
*row
;
1173 int delta
, delta_bytes
;
1177 /* Increment start and end positions. */
1178 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1179 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1180 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1181 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1183 /* Increment positions in glyphs. */
1184 for (area
= 0; area
< LAST_AREA
; ++area
)
1185 for (i
= 0; i
< row
->used
[area
]; ++i
)
1186 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1187 && row
->glyphs
[area
][i
].charpos
> 0)
1188 row
->glyphs
[area
][i
].charpos
+= delta
;
1190 /* Capture the case of rows displaying a line end. */
1191 if (row
->used
[TEXT_AREA
] == 0
1192 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1193 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1198 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1199 contents, i.e. glyph structure contents are exchanged between A and
1200 B without changing glyph pointers in A and B. */
1203 swap_glyphs_in_rows (a
, b
)
1204 struct glyph_row
*a
, *b
;
1208 for (area
= 0; area
< LAST_AREA
; ++area
)
1210 /* Number of glyphs to swap. */
1211 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1213 /* Start of glyphs in area of row A. */
1214 struct glyph
*glyph_a
= a
->glyphs
[area
];
1216 /* End + 1 of glyphs in area of row A. */
1217 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1219 /* Start of glyphs in area of row B. */
1220 struct glyph
*glyph_b
= b
->glyphs
[area
];
1222 while (glyph_a
< glyph_a_end
)
1224 /* Non-ISO HP/UX compiler doesn't like auto struct
1228 *glyph_a
= *glyph_b
;
1238 /* Exchange pointers to glyph memory between glyph rows A and B. */
1241 swap_glyph_pointers (a
, b
)
1242 struct glyph_row
*a
, *b
;
1245 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1247 struct glyph
*temp
= a
->glyphs
[i
];
1248 a
->glyphs
[i
] = b
->glyphs
[i
];
1249 b
->glyphs
[i
] = temp
;
1254 /* Copy glyph row structure FROM to glyph row structure TO, except
1255 that glyph pointers in the structures are left unchanged. */
1258 copy_row_except_pointers (to
, from
)
1259 struct glyph_row
*to
, *from
;
1261 struct glyph
*pointers
[1 + LAST_AREA
];
1263 /* Save glyph pointers of TO. */
1264 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1266 /* Do a structure assignment. */
1269 /* Restore original pointers of TO. */
1270 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1274 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1275 TO and FROM are left unchanged. Glyph contents are copied from the
1276 glyph memory of FROM to the glyph memory of TO. Increment buffer
1277 positions in row TO by DELTA/ DELTA_BYTES. */
1280 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1281 struct glyph_row
*to
, *from
;
1282 int delta
, delta_bytes
;
1286 /* This is like a structure assignment TO = FROM, except that
1287 glyph pointers in the rows are left unchanged. */
1288 copy_row_except_pointers (to
, from
);
1290 /* Copy glyphs from FROM to TO. */
1291 for (area
= 0; area
< LAST_AREA
; ++area
)
1292 if (from
->used
[area
])
1293 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1294 from
->used
[area
] * sizeof (struct glyph
));
1296 /* Increment buffer positions in TO by DELTA. */
1297 increment_row_positions (to
, delta
, delta_bytes
);
1301 /* Assign glyph row FROM to glyph row TO. This works like a structure
1302 assignment TO = FROM, except that glyph pointers are not copied but
1303 exchanged between TO and FROM. Pointers must be exchanged to avoid
1307 assign_row (to
, from
)
1308 struct glyph_row
*to
, *from
;
1310 swap_glyph_pointers (to
, from
);
1311 copy_row_except_pointers (to
, from
);
1315 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1316 a row in a window matrix, is a slice of the glyph memory of the
1317 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1318 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1319 memory of FRAME_ROW. */
1324 glyph_row_slice_p (window_row
, frame_row
)
1325 struct glyph_row
*window_row
, *frame_row
;
1327 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1328 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1329 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1331 return (frame_glyph_start
<= window_glyph_start
1332 && window_glyph_start
< frame_glyph_end
);
1335 #endif /* GLYPH_DEBUG */
1339 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1340 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1341 in WINDOW_MATRIX is found satisfying the condition. */
1343 static struct glyph_row
*
1344 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1345 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1350 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1352 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1353 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1354 frame_matrix
->rows
+ row
))
1357 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1362 /* Prepare ROW for display. Desired rows are cleared lazily,
1363 i.e. they are only marked as to be cleared by setting their
1364 enabled_p flag to zero. When a row is to be displayed, a prior
1365 call to this function really clears it. */
1368 prepare_desired_row (row
)
1369 struct glyph_row
*row
;
1371 if (!row
->enabled_p
)
1373 clear_glyph_row (row
);
1379 /* Return a hash code for glyph row ROW. */
1382 line_hash_code (row
)
1383 struct glyph_row
*row
;
1391 /* Give all highlighted lines the same hash code
1392 so as to encourage scrolling to leave them in place. */
1397 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1398 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1402 int c
= glyph
->u
.ch
;
1403 int face_id
= glyph
->face_id
;
1404 if (must_write_spaces
)
1406 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1407 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1420 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1421 the number of characters in the line. If must_write_spaces is
1422 zero, leading and trailing spaces are ignored. */
1425 line_draw_cost (matrix
, vpos
)
1426 struct glyph_matrix
*matrix
;
1429 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1430 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1431 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1433 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1434 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1436 /* Ignore trailing and leading spaces if we can. */
1437 if (!must_write_spaces
)
1439 /* Skip from the end over trailing spaces. */
1440 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1443 /* All blank line. */
1447 /* Skip over leading spaces. */
1448 while (CHAR_GLYPH_SPACE_P (*beg
))
1452 /* If we don't have a glyph-table, each glyph is one character,
1453 so return the number of glyphs. */
1454 if (glyph_table_base
== 0)
1458 /* Otherwise, scan the glyphs and accumulate their total length
1463 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1466 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1469 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1479 /* Test two glyph rows A and B for equality. Value is non-zero if A
1480 and B have equal contents. W is the window to which the glyphs
1481 rows A and B belong. It is needed here to test for partial row
1482 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1483 flags of A and B, too. */
1486 row_equal_p (w
, a
, b
, mouse_face_p
)
1488 struct glyph_row
*a
, *b
;
1493 else if (a
->hash
!= b
->hash
)
1497 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1500 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1503 /* Compare glyphs. */
1504 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1506 if (a
->used
[area
] != b
->used
[area
])
1509 a_glyph
= a
->glyphs
[area
];
1510 a_end
= a_glyph
+ a
->used
[area
];
1511 b_glyph
= b
->glyphs
[area
];
1513 while (a_glyph
< a_end
1514 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1515 ++a_glyph
, ++b_glyph
;
1517 if (a_glyph
!= a_end
)
1521 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1522 || a
->inverse_p
!= b
->inverse_p
1523 || a
->fill_line_p
!= b
->fill_line_p
1524 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1525 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1526 || a
->continued_p
!= b
->continued_p
1527 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1528 || a
->overlapped_p
!= b
->overlapped_p
1529 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1530 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1531 /* Different partially visible characters on left margin. */
1533 /* Different height. */
1534 || a
->ascent
!= b
->ascent
1535 || a
->phys_ascent
!= b
->phys_ascent
1536 || a
->phys_height
!= b
->phys_height
1537 || a
->visible_height
!= b
->visible_height
)
1546 /***********************************************************************
1549 See dispextern.h for an overall explanation of glyph pools.
1550 ***********************************************************************/
1552 /* Allocate a glyph_pool structure. The structure returned is
1553 initialized with zeros. The global variable glyph_pool_count is
1554 incremented for each pool allocated. */
1556 static struct glyph_pool
*
1559 struct glyph_pool
*result
;
1561 /* Allocate a new glyph_pool and clear it. */
1562 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1563 bzero (result
, sizeof *result
);
1565 /* For memory leak and double deletion checking. */
1572 /* Free a glyph_pool structure POOL. The function may be called with
1573 a null POOL pointer. The global variable glyph_pool_count is
1574 decremented with every pool structure freed. If this count gets
1575 negative, more structures were freed than allocated, i.e. one
1576 structure must have been freed more than once or a bogus pointer
1577 was passed to free_glyph_pool. */
1580 free_glyph_pool (pool
)
1581 struct glyph_pool
*pool
;
1585 /* More freed than allocated? */
1587 xassert (glyph_pool_count
>= 0);
1589 xfree (pool
->glyphs
);
1595 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1596 columns we need. This function never shrinks a pool. The only
1597 case in which this would make sense, would be when a frame's size
1598 is changed from a large value to a smaller one. But, if someone
1599 does it once, we can expect that he will do it again.
1601 Value is non-zero if the pool changed in a way which makes
1602 re-adjusting window glyph matrices necessary. */
1605 realloc_glyph_pool (pool
, matrix_dim
)
1606 struct glyph_pool
*pool
;
1607 struct dim matrix_dim
;
1612 changed_p
= (pool
->glyphs
== 0
1613 || matrix_dim
.height
!= pool
->nrows
1614 || matrix_dim
.width
!= pool
->ncolumns
);
1616 /* Enlarge the glyph pool. */
1617 needed
= matrix_dim
.width
* matrix_dim
.height
;
1618 if (needed
> pool
->nglyphs
)
1620 int size
= needed
* sizeof (struct glyph
);
1623 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1626 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1627 bzero (pool
->glyphs
, size
);
1630 pool
->nglyphs
= needed
;
1633 /* Remember the number of rows and columns because (a) we use then
1634 to do sanity checks, and (b) the number of columns determines
1635 where rows in the frame matrix start---this must be available to
1636 determine pointers to rows of window sub-matrices. */
1637 pool
->nrows
= matrix_dim
.height
;
1638 pool
->ncolumns
= matrix_dim
.width
;
1645 /***********************************************************************
1647 ***********************************************************************/
1652 /* Flush standard output. This is sometimes useful to call from
1662 /* Check that no glyph pointers have been lost in MATRIX. If a
1663 pointer has been lost, e.g. by using a structure assignment between
1664 rows, at least one pointer must occur more than once in the rows of
1668 check_matrix_pointer_lossage (matrix
)
1669 struct glyph_matrix
*matrix
;
1673 for (i
= 0; i
< matrix
->nrows
; ++i
)
1674 for (j
= 0; j
< matrix
->nrows
; ++j
)
1676 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1677 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1681 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1684 matrix_row (matrix
, row
)
1685 struct glyph_matrix
*matrix
;
1688 xassert (matrix
&& matrix
->rows
);
1689 xassert (row
>= 0 && row
< matrix
->nrows
);
1691 /* That's really too slow for normal testing because this function
1692 is called almost everywhere. Although---it's still astonishingly
1693 fast, so it is valuable to have for debugging purposes. */
1695 check_matrix_pointer_lossage (matrix
);
1698 return matrix
->rows
+ row
;
1702 #if 0 /* This function makes invalid assumptions when text is
1703 partially invisible. But it might come handy for debugging
1706 /* Check invariants that must hold for an up to date current matrix of
1710 check_matrix_invariants (w
)
1713 struct glyph_matrix
*matrix
= w
->current_matrix
;
1714 int yb
= window_text_bottom_y (w
);
1715 struct glyph_row
*row
= matrix
->rows
;
1716 struct glyph_row
*last_text_row
= NULL
;
1717 struct buffer
*saved
= current_buffer
;
1718 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1721 /* This can sometimes happen for a fresh window. */
1722 if (matrix
->nrows
< 2)
1725 set_buffer_temp (buffer
);
1727 /* Note: last row is always reserved for the mode line. */
1728 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1729 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1731 struct glyph_row
*next
= row
+ 1;
1733 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1734 last_text_row
= row
;
1736 /* Check that character and byte positions are in sync. */
1737 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1738 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1740 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1741 have such a position temporarily in case of a minibuffer
1742 displaying something like `[Sole completion]' at its end. */
1743 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1744 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1745 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1747 /* Check that end position of `row' is equal to start position
1749 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1751 xassert (MATRIX_ROW_END_CHARPOS (row
)
1752 == MATRIX_ROW_START_CHARPOS (next
));
1753 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1754 == MATRIX_ROW_START_BYTEPOS (next
));
1759 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1760 xassert (w
->desired_matrix
->rows
!= NULL
);
1761 set_buffer_temp (saved
);
1766 #endif /* GLYPH_DEBUG != 0 */
1770 /**********************************************************************
1771 Allocating/ Adjusting Glyph Matrices
1772 **********************************************************************/
1774 /* Allocate glyph matrices over a window tree for a frame-based
1777 X and Y are column/row within the frame glyph matrix where
1778 sub-matrices for the window tree rooted at WINDOW must be
1779 allocated. CH_DIM contains the dimensions of the smallest
1780 character that could be used during display. DIM_ONLY_P non-zero
1781 means that the caller of this function is only interested in the
1782 result matrix dimension, and matrix adjustments should not be
1785 The function returns the total width/height of the sub-matrices of
1786 the window tree. If called on a frame root window, the computation
1787 will take the mini-buffer window into account.
1789 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1791 NEW_LEAF_MATRIX set if any window in the tree did not have a
1792 glyph matrices yet, and
1794 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1795 any window in the tree will be changed or have been changed (see
1798 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1801 Windows are arranged into chains of windows on the same level
1802 through the next fields of window structures. Such a level can be
1803 either a sequence of horizontally adjacent windows from left to
1804 right, or a sequence of vertically adjacent windows from top to
1805 bottom. Each window in a horizontal sequence can be either a leaf
1806 window or a vertical sequence; a window in a vertical sequence can
1807 be either a leaf or a horizontal sequence. All windows in a
1808 horizontal sequence have the same height, and all windows in a
1809 vertical sequence have the same width.
1811 This function uses, for historical reasons, a more general
1812 algorithm to determine glyph matrix dimensions that would be
1815 The matrix height of a horizontal sequence is determined by the
1816 maximum height of any matrix in the sequence. The matrix width of
1817 a horizontal sequence is computed by adding up matrix widths of
1818 windows in the sequence.
1820 |<------- result width ------->|
1821 +---------+----------+---------+ ---
1824 +---------+ | | result height
1829 The matrix width of a vertical sequence is the maximum matrix width
1830 of any window in the sequence. Its height is computed by adding up
1831 matrix heights of windows in the sequence.
1833 |<---- result width -->|
1841 +------------+---------+ |
1844 +------------+---------+ --- */
1846 /* Bit indicating that a new matrix will be allocated or has been
1849 #define NEW_LEAF_MATRIX (1 << 0)
1851 /* Bit indicating that a matrix will or has changed its location or
1854 #define CHANGED_LEAF_MATRIX (1 << 1)
1857 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1858 dim_only_p
, window_change_flags
)
1863 int *window_change_flags
;
1865 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1867 int wmax
= 0, hmax
= 0;
1871 int in_horz_combination_p
;
1873 /* What combination is WINDOW part of? Compute this once since the
1874 result is the same for all windows in the `next' chain. The
1875 special case of a root window (parent equal to nil) is treated
1876 like a vertical combination because a root window's `next'
1877 points to the mini-buffer window, if any, which is arranged
1878 vertically below other windows. */
1879 in_horz_combination_p
1880 = (!NILP (XWINDOW (window
)->parent
)
1881 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1883 /* For WINDOW and all windows on the same level. */
1886 w
= XWINDOW (window
);
1888 /* Get the dimension of the window sub-matrix for W, depending
1889 on whether this a combination or a leaf window. */
1890 if (!NILP (w
->hchild
))
1891 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1893 window_change_flags
);
1894 else if (!NILP (w
->vchild
))
1895 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1897 window_change_flags
);
1900 /* If not already done, allocate sub-matrix structures. */
1901 if (w
->desired_matrix
== NULL
)
1903 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1904 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1905 *window_change_flags
|= NEW_LEAF_MATRIX
;
1908 /* Width and height MUST be chosen so that there are no
1909 holes in the frame matrix. */
1910 dim
.width
= XINT (w
->width
);
1911 dim
.height
= XINT (w
->height
);
1913 /* Will matrix be re-allocated? */
1914 if (x
!= w
->desired_matrix
->matrix_x
1915 || y
!= w
->desired_matrix
->matrix_y
1916 || dim
.width
!= w
->desired_matrix
->matrix_w
1917 || dim
.height
!= w
->desired_matrix
->matrix_h
1918 || (margin_glyphs_to_reserve (w
, dim
.width
,
1919 w
->right_margin_width
)
1920 != w
->desired_matrix
->left_margin_glyphs
)
1921 || (margin_glyphs_to_reserve (w
, dim
.width
,
1922 w
->left_margin_width
)
1923 != w
->desired_matrix
->right_margin_glyphs
))
1924 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1926 /* Actually change matrices, if allowed. Do not consider
1927 CHANGED_LEAF_MATRIX computed above here because the pool
1928 may have been changed which we don't now here. We trust
1929 that we only will be called with DIM_ONLY_P != 0 when
1933 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1934 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1938 /* If we are part of a horizontal combination, advance x for
1939 windows to the right of W; otherwise advance y for windows
1941 if (in_horz_combination_p
)
1946 /* Remember maximum glyph matrix dimensions. */
1947 wmax
= max (wmax
, dim
.width
);
1948 hmax
= max (hmax
, dim
.height
);
1950 /* Next window on same level. */
1953 while (!NILP (window
));
1955 /* Set `total' to the total glyph matrix dimension of this window
1956 level. In a vertical combination, the width is the width of the
1957 widest window; the height is the y we finally reached, corrected
1958 by the y we started with. In a horizontal combination, the total
1959 height is the height of the tallest window, and the width is the
1960 x we finally reached, corrected by the x we started with. */
1961 if (in_horz_combination_p
)
1963 total
.width
= x
- x0
;
1964 total
.height
= hmax
;
1969 total
.height
= y
- y0
;
1976 /* Allocate window matrices for window-based redisplay. W is the
1977 window whose matrices must be allocated/reallocated. CH_DIM is the
1978 size of the smallest character that could potentially be used on W. */
1981 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1985 struct frame
*f
= XFRAME (w
->frame
);
1989 if (!NILP (w
->vchild
))
1990 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1991 else if (!NILP (w
->hchild
))
1992 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1995 /* W is a leaf window. */
1996 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
1997 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
2000 /* If matrices are not yet allocated, allocate them now. */
2001 if (w
->desired_matrix
== NULL
)
2003 w
->desired_matrix
= new_glyph_matrix (NULL
);
2004 w
->current_matrix
= new_glyph_matrix (NULL
);
2007 /* Compute number of glyphs needed in a glyph row. */
2008 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
2010 /* 2 partially visible columns in the text area. */
2012 /* One partially visible column at the right
2013 edge of each marginal area. */
2016 /* Compute number of glyph rows needed. */
2017 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
2019 /* One partially visible line at the top and
2020 bottom of the window. */
2022 /* 2 for top and mode line. */
2025 /* Change matrices. */
2026 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2027 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2030 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2035 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2036 do it for all frames; otherwise do it just for the given frame.
2037 This function must be called when a new frame is created, its size
2038 changes, or its window configuration changes. */
2044 /* Block input so that expose events and other events that access
2045 glyph matrices are not processed while we are changing them. */
2049 adjust_frame_glyphs (f
);
2052 Lisp_Object tail
, lisp_frame
;
2054 FOR_EACH_FRAME (tail
, lisp_frame
)
2055 adjust_frame_glyphs (XFRAME (lisp_frame
));
2062 /* Adjust frame glyphs when Emacs is initialized.
2064 To be called from init_display.
2066 We need a glyph matrix because redraw will happen soon.
2067 Unfortunately, window sizes on selected_frame are not yet set to
2068 meaningful values. I believe we can assume that there are only two
2069 windows on the frame---the mini-buffer and the root window. Frame
2070 height and width seem to be correct so far. So, set the sizes of
2071 windows to estimated values. */
2074 adjust_frame_glyphs_initially ()
2076 struct frame
*sf
= SELECTED_FRAME ();
2077 struct window
*root
= XWINDOW (sf
->root_window
);
2078 struct window
*mini
= XWINDOW (root
->next
);
2079 int frame_height
= FRAME_HEIGHT (sf
);
2080 int frame_width
= FRAME_WIDTH (sf
);
2081 int top_margin
= FRAME_TOP_MARGIN (sf
);
2083 /* Do it for the root window. */
2084 XSETFASTINT (root
->top
, top_margin
);
2085 XSETFASTINT (root
->width
, frame_width
);
2086 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2088 /* Do it for the mini-buffer window. */
2089 XSETFASTINT (mini
->top
, frame_height
- 1);
2090 XSETFASTINT (mini
->width
, frame_width
);
2091 set_window_height (root
->next
, 1, 0);
2093 adjust_frame_glyphs (sf
);
2094 glyphs_initialized_initially_p
= 1;
2098 /* Allocate/reallocate glyph matrices of a single frame F. */
2101 adjust_frame_glyphs (f
)
2104 if (FRAME_WINDOW_P (f
))
2105 adjust_frame_glyphs_for_window_redisplay (f
);
2107 adjust_frame_glyphs_for_frame_redisplay (f
);
2109 /* Don't forget the message buffer and the buffer for
2110 decode_mode_spec. */
2111 adjust_frame_message_buffer (f
);
2112 adjust_decode_mode_spec_buffer (f
);
2114 f
->glyphs_initialized_p
= 1;
2118 /* In the window tree with root W, build current matrices of leaf
2119 windows from the frame's current matrix. */
2122 fake_current_matrices (window
)
2127 for (; !NILP (window
); window
= w
->next
)
2129 w
= XWINDOW (window
);
2131 if (!NILP (w
->hchild
))
2132 fake_current_matrices (w
->hchild
);
2133 else if (!NILP (w
->vchild
))
2134 fake_current_matrices (w
->vchild
);
2138 struct frame
*f
= XFRAME (w
->frame
);
2139 struct glyph_matrix
*m
= w
->current_matrix
;
2140 struct glyph_matrix
*fm
= f
->current_matrix
;
2142 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2143 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2145 for (i
= 0; i
< m
->matrix_h
; ++i
)
2147 struct glyph_row
*r
= m
->rows
+ i
;
2148 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2150 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2151 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2153 r
->enabled_p
= fr
->enabled_p
;
2156 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2157 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2158 r
->used
[TEXT_AREA
] = (m
->matrix_w
2159 - r
->used
[LEFT_MARGIN_AREA
]
2160 - r
->used
[RIGHT_MARGIN_AREA
]);
2162 r
->inverse_p
= fr
->inverse_p
;
2170 /* Save away the contents of frame F's current frame matrix. Value is
2171 a glyph matrix holding the contents of F's current frame matrix. '*/
2173 static struct glyph_matrix
*
2174 save_current_matrix (f
)
2178 struct glyph_matrix
*saved
;
2180 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2181 bzero (saved
, sizeof *saved
);
2182 saved
->nrows
= f
->current_matrix
->nrows
;
2183 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2184 * sizeof *saved
->rows
);
2185 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2187 for (i
= 0; i
< saved
->nrows
; ++i
)
2189 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2190 struct glyph_row
*to
= saved
->rows
+ i
;
2191 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2192 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2193 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2194 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2201 /* Restore the contents of frame F's current frame matrix from SAVED,
2202 and free memory associated with SAVED. */
2205 restore_current_matrix (f
, saved
)
2207 struct glyph_matrix
*saved
;
2211 for (i
= 0; i
< saved
->nrows
; ++i
)
2213 struct glyph_row
*from
= saved
->rows
+ i
;
2214 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2215 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2216 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2217 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2218 xfree (from
->glyphs
[TEXT_AREA
]);
2221 xfree (saved
->rows
);
2227 /* Allocate/reallocate glyph matrices of a single frame F for
2228 frame-based redisplay. */
2231 adjust_frame_glyphs_for_frame_redisplay (f
)
2235 struct dim matrix_dim
;
2237 int window_change_flags
;
2240 if (!FRAME_LIVE_P (f
))
2243 /* Determine the smallest character in any font for F. On
2244 console windows, all characters have dimension (1, 1). */
2245 ch_dim
.width
= ch_dim
.height
= 1;
2247 top_window_y
= FRAME_TOP_MARGIN (f
);
2249 /* Allocate glyph pool structures if not already done. */
2250 if (f
->desired_pool
== NULL
)
2252 f
->desired_pool
= new_glyph_pool ();
2253 f
->current_pool
= new_glyph_pool ();
2256 /* Allocate frames matrix structures if needed. */
2257 if (f
->desired_matrix
== NULL
)
2259 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2260 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2263 /* Compute window glyph matrices. (This takes the mini-buffer
2264 window into account). The result is the size of the frame glyph
2265 matrix needed. The variable window_change_flags is set to a bit
2266 mask indicating whether new matrices will be allocated or
2267 existing matrices change their size or location within the frame
2269 window_change_flags
= 0;
2271 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2274 &window_change_flags
);
2276 /* Add in menu bar lines, if any. */
2277 matrix_dim
.height
+= top_window_y
;
2279 /* Enlarge pools as necessary. */
2280 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2281 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2283 /* Set up glyph pointers within window matrices. Do this only if
2284 absolutely necessary since it requires a frame redraw. */
2285 if (pool_changed_p
|| window_change_flags
)
2287 /* Do it for window matrices. */
2288 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2289 0, top_window_y
, ch_dim
, 0,
2290 &window_change_flags
);
2292 /* Size of frame matrices must equal size of frame. Note
2293 that we are called for X frames with window widths NOT equal
2294 to the frame width (from CHANGE_FRAME_SIZE_1). */
2295 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2296 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2298 /* Pointers to glyph memory in glyph rows are exchanged during
2299 the update phase of redisplay, which means in general that a
2300 frame's current matrix consists of pointers into both the
2301 desired and current glyph pool of the frame. Adjusting a
2302 matrix sets the frame matrix up so that pointers are all into
2303 the same pool. If we want to preserve glyph contents of the
2304 current matrix over a call to adjust_glyph_matrix, we must
2305 make a copy of the current glyphs, and restore the current
2306 matrix' contents from that copy. */
2307 if (display_completed
2308 && !FRAME_GARBAGED_P (f
)
2309 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2310 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2312 struct glyph_matrix
*copy
= save_current_matrix (f
);
2313 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2314 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2315 restore_current_matrix (f
, copy
);
2316 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2320 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2321 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2322 SET_FRAME_GARBAGED (f
);
2328 /* Allocate/reallocate glyph matrices of a single frame F for
2329 window-based redisplay. */
2332 adjust_frame_glyphs_for_window_redisplay (f
)
2338 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2340 /* Get minimum sizes. */
2341 #ifdef HAVE_WINDOW_SYSTEM
2342 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2343 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2345 ch_dim
.width
= ch_dim
.height
= 1;
2348 /* Allocate/reallocate window matrices. */
2349 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2352 /* Allocate/ reallocate matrices of the dummy window used to display
2353 the menu bar under X when no X toolkit support is available. */
2354 #ifndef USE_X_TOOLKIT
2356 /* Allocate a dummy window if not already done. */
2357 if (NILP (f
->menu_bar_window
))
2359 f
->menu_bar_window
= make_window ();
2360 w
= XWINDOW (f
->menu_bar_window
);
2361 XSETFRAME (w
->frame
, f
);
2362 w
->pseudo_window_p
= 1;
2365 w
= XWINDOW (f
->menu_bar_window
);
2367 /* Set window dimensions to frame dimensions and allocate or
2368 adjust glyph matrices of W. */
2369 XSETFASTINT (w
->top
, 0);
2370 XSETFASTINT (w
->left
, 0);
2371 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2372 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2373 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2375 #endif /* not USE_X_TOOLKIT */
2377 /* Allocate/ reallocate matrices of the tool bar window. If we
2378 don't have a tool bar window yet, make one. */
2379 if (NILP (f
->tool_bar_window
))
2381 f
->tool_bar_window
= make_window ();
2382 w
= XWINDOW (f
->tool_bar_window
);
2383 XSETFRAME (w
->frame
, f
);
2384 w
->pseudo_window_p
= 1;
2387 w
= XWINDOW (f
->tool_bar_window
);
2389 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2390 XSETFASTINT (w
->left
, 0);
2391 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2392 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2393 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2397 /* Adjust/ allocate message buffer of frame F.
2399 Note that the message buffer is never freed. Since I could not
2400 find a free in 19.34, I assume that freeing it would be
2401 problematic in some way and don't do it either.
2403 (Implementation note: It should be checked if we can free it
2404 eventually without causing trouble). */
2407 adjust_frame_message_buffer (f
)
2410 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2412 if (FRAME_MESSAGE_BUF (f
))
2414 char *buffer
= FRAME_MESSAGE_BUF (f
);
2415 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2416 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2419 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2423 /* Re-allocate buffer for decode_mode_spec on frame F. */
2426 adjust_decode_mode_spec_buffer (f
)
2429 f
->decode_mode_spec_buffer
2430 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2431 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2436 /**********************************************************************
2437 Freeing Glyph Matrices
2438 **********************************************************************/
2440 /* Free glyph memory for a frame F. F may be null. This function can
2441 be called for the same frame more than once. The root window of
2442 F may be nil when this function is called. This is the case when
2443 the function is called when F is destroyed. */
2449 if (f
&& f
->glyphs_initialized_p
)
2451 /* Block interrupt input so that we don't get surprised by an X
2452 event while we're in an inconsistent state. */
2454 f
->glyphs_initialized_p
= 0;
2456 /* Release window sub-matrices. */
2457 if (!NILP (f
->root_window
))
2458 free_window_matrices (XWINDOW (f
->root_window
));
2460 /* Free the dummy window for menu bars without X toolkit and its
2462 if (!NILP (f
->menu_bar_window
))
2464 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2465 free_glyph_matrix (w
->desired_matrix
);
2466 free_glyph_matrix (w
->current_matrix
);
2467 w
->desired_matrix
= w
->current_matrix
= NULL
;
2468 f
->menu_bar_window
= Qnil
;
2471 /* Free the tool bar window and its glyph matrices. */
2472 if (!NILP (f
->tool_bar_window
))
2474 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2475 free_glyph_matrix (w
->desired_matrix
);
2476 free_glyph_matrix (w
->current_matrix
);
2477 w
->desired_matrix
= w
->current_matrix
= NULL
;
2478 f
->tool_bar_window
= Qnil
;
2481 /* Release frame glyph matrices. Reset fields to zero in
2482 case we are called a second time. */
2483 if (f
->desired_matrix
)
2485 free_glyph_matrix (f
->desired_matrix
);
2486 free_glyph_matrix (f
->current_matrix
);
2487 f
->desired_matrix
= f
->current_matrix
= NULL
;
2490 /* Release glyph pools. */
2491 if (f
->desired_pool
)
2493 free_glyph_pool (f
->desired_pool
);
2494 free_glyph_pool (f
->current_pool
);
2495 f
->desired_pool
= f
->current_pool
= NULL
;
2503 /* Free glyph sub-matrices in the window tree rooted at W. This
2504 function may be called with a null pointer, and it may be called on
2505 the same tree more than once. */
2508 free_window_matrices (w
)
2513 if (!NILP (w
->hchild
))
2514 free_window_matrices (XWINDOW (w
->hchild
));
2515 else if (!NILP (w
->vchild
))
2516 free_window_matrices (XWINDOW (w
->vchild
));
2519 /* This is a leaf window. Free its memory and reset fields
2520 to zero in case this function is called a second time for
2522 free_glyph_matrix (w
->current_matrix
);
2523 free_glyph_matrix (w
->desired_matrix
);
2524 w
->current_matrix
= w
->desired_matrix
= NULL
;
2527 /* Next window on same level. */
2528 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2533 /* Check glyph memory leaks. This function is called from
2534 shut_down_emacs. Note that frames are not destroyed when Emacs
2535 exits. We therefore free all glyph memory for all active frames
2536 explicitly and check that nothing is left allocated. */
2539 check_glyph_memory ()
2541 Lisp_Object tail
, frame
;
2543 /* Free glyph memory for all frames. */
2544 FOR_EACH_FRAME (tail
, frame
)
2545 free_glyphs (XFRAME (frame
));
2547 /* Check that nothing is left allocated. */
2548 if (glyph_matrix_count
)
2550 if (glyph_pool_count
)
2556 /**********************************************************************
2557 Building a Frame Matrix
2558 **********************************************************************/
2560 /* Most of the redisplay code works on glyph matrices attached to
2561 windows. This is a good solution most of the time, but it is not
2562 suitable for terminal code. Terminal output functions cannot rely
2563 on being able to set an arbitrary terminal window. Instead they
2564 must be provided with a view of the whole frame, i.e. the whole
2565 screen. We build such a view by constructing a frame matrix from
2566 window matrices in this section.
2568 Windows that must be updated have their must_be_update_p flag set.
2569 For all such windows, their desired matrix is made part of the
2570 desired frame matrix. For other windows, their current matrix is
2571 made part of the desired frame matrix.
2573 +-----------------+----------------+
2574 | desired | desired |
2576 +-----------------+----------------+
2579 +----------------------------------+
2581 Desired window matrices can be made part of the frame matrix in a
2582 cheap way: We exploit the fact that the desired frame matrix and
2583 desired window matrices share their glyph memory. This is not
2584 possible for current window matrices. Their glyphs are copied to
2585 the desired frame matrix. The latter is equivalent to
2586 preserve_other_columns in the old redisplay.
2588 Used glyphs counters for frame matrix rows are the result of adding
2589 up glyph lengths of the window matrices. A line in the frame
2590 matrix is enabled, if a corresponding line in a window matrix is
2593 After building the desired frame matrix, it will be passed to
2594 terminal code, which will manipulate both the desired and current
2595 frame matrix. Changes applied to the frame's current matrix have
2596 to be visible in current window matrices afterwards, of course.
2598 This problem is solved like this:
2600 1. Window and frame matrices share glyphs. Window matrices are
2601 constructed in a way that their glyph contents ARE the glyph
2602 contents needed in a frame matrix. Thus, any modification of
2603 glyphs done in terminal code will be reflected in window matrices
2606 2. Exchanges of rows in a frame matrix done by terminal code are
2607 intercepted by hook functions so that corresponding row operations
2608 on window matrices can be performed. This is necessary because we
2609 use pointers to glyphs in glyph row structures. To satisfy the
2610 assumption of point 1 above that glyphs are updated implicitly in
2611 window matrices when they are manipulated via the frame matrix,
2612 window and frame matrix must of course agree where to find the
2613 glyphs for their rows. Possible manipulations that must be
2614 mirrored are assignments of rows of the desired frame matrix to the
2615 current frame matrix and scrolling the current frame matrix. */
2617 /* Build frame F's desired matrix from window matrices. Only windows
2618 which have the flag must_be_updated_p set have to be updated. Menu
2619 bar lines of a frame are not covered by window matrices, so make
2620 sure not to touch them in this function. */
2623 build_frame_matrix (f
)
2628 /* F must have a frame matrix when this function is called. */
2629 xassert (!FRAME_WINDOW_P (f
));
2631 /* Clear all rows in the frame matrix covered by window matrices.
2632 Menu bar lines are not covered by windows. */
2633 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2634 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2636 /* Build the matrix by walking the window tree. */
2637 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2638 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2642 /* Walk a window tree, building a frame matrix MATRIX from window
2643 matrices. W is the root of a window tree. */
2646 build_frame_matrix_from_window_tree (matrix
, w
)
2647 struct glyph_matrix
*matrix
;
2652 if (!NILP (w
->hchild
))
2653 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2654 else if (!NILP (w
->vchild
))
2655 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2657 build_frame_matrix_from_leaf_window (matrix
, w
);
2659 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2664 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2665 desired frame matrix built. W is a leaf window whose desired or
2666 current matrix is to be added to FRAME_MATRIX. W's flag
2667 must_be_updated_p determines which matrix it contributes to
2668 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2669 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2670 Adding a desired matrix means setting up used counters and such in
2671 frame rows, while adding a current window matrix to FRAME_MATRIX
2672 means copying glyphs. The latter case corresponds to
2673 preserve_other_columns in the old redisplay. */
2676 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2677 struct glyph_matrix
*frame_matrix
;
2680 struct glyph_matrix
*window_matrix
;
2681 int window_y
, frame_y
;
2682 /* If non-zero, a glyph to insert at the right border of W. */
2683 GLYPH right_border_glyph
= 0;
2685 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2686 if (w
->must_be_updated_p
)
2688 window_matrix
= w
->desired_matrix
;
2690 /* Decide whether we want to add a vertical border glyph. */
2691 if (!WINDOW_RIGHTMOST_P (w
))
2693 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2694 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2695 ? XINT (DISP_BORDER_GLYPH (dp
))
2700 window_matrix
= w
->current_matrix
;
2702 /* For all rows in the window matrix and corresponding rows in the
2705 frame_y
= window_matrix
->matrix_y
;
2706 while (window_y
< window_matrix
->nrows
)
2708 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2709 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2710 int current_row_p
= window_matrix
== w
->current_matrix
;
2712 /* Fill up the frame row with spaces up to the left margin of the
2714 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2716 /* Fill up areas in the window matrix row with spaces. */
2717 fill_up_glyph_row_with_spaces (window_row
);
2719 /* If only part of W's desired matrix has been built, and
2720 window_row wasn't displayed, use the corresponding current
2722 if (window_matrix
== w
->desired_matrix
2723 && !window_row
->enabled_p
)
2725 window_row
= w
->current_matrix
->rows
+ window_y
;
2731 /* Copy window row to frame row. */
2732 bcopy (window_row
->glyphs
[0],
2733 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2734 window_matrix
->matrix_w
* sizeof (struct glyph
));
2738 xassert (window_row
->enabled_p
);
2740 /* Only when a desired row has been displayed, we want
2741 the corresponding frame row to be updated. */
2742 frame_row
->enabled_p
= 1;
2744 /* Maybe insert a vertical border between horizontally adjacent
2746 if (right_border_glyph
)
2748 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2749 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2752 /* Window row window_y must be a slice of frame row
2754 xassert (glyph_row_slice_p (window_row
, frame_row
));
2756 /* If rows are in sync, we don't have to copy glyphs because
2757 frame and window share glyphs. */
2760 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2761 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2765 /* Set number of used glyphs in the frame matrix. Since we fill
2766 up with spaces, and visit leaf windows from left to right it
2767 can be done simply. */
2768 frame_row
->used
[TEXT_AREA
]
2769 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2771 /* Or in other flags. */
2772 frame_row
->inverse_p
|= window_row
->inverse_p
;
2781 /* Add spaces to a glyph row ROW in a window matrix.
2783 Each row has the form:
2785 +---------+-----------------------------+------------+
2786 | left | text | right |
2787 +---------+-----------------------------+------------+
2789 Left and right marginal areas are optional. This function adds
2790 spaces to areas so that there are no empty holes between areas.
2791 In other words: If the right area is not empty, the text area
2792 is filled up with spaces up to the right area. If the text area
2793 is not empty, the left area is filled up.
2795 To be called for frame-based redisplay, only. */
2798 fill_up_glyph_row_with_spaces (row
)
2799 struct glyph_row
*row
;
2801 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2802 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2803 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2807 /* Fill area AREA of glyph row ROW with spaces. To be called for
2808 frame-based redisplay only. */
2811 fill_up_glyph_row_area_with_spaces (row
, area
)
2812 struct glyph_row
*row
;
2815 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2817 struct glyph
*end
= row
->glyphs
[area
+ 1];
2818 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2821 *text
++ = space_glyph
;
2822 row
->used
[area
] = text
- row
->glyphs
[area
];
2827 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2828 reached. In frame matrices only one area, TEXT_AREA, is used. */
2831 fill_up_frame_row_with_spaces (row
, upto
)
2832 struct glyph_row
*row
;
2835 int i
= row
->used
[TEXT_AREA
];
2836 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2839 glyph
[i
++] = space_glyph
;
2841 row
->used
[TEXT_AREA
] = i
;
2846 /**********************************************************************
2847 Mirroring operations on frame matrices in window matrices
2848 **********************************************************************/
2850 /* Set frame being updated via frame-based redisplay to F. This
2851 function must be called before updates to make explicit that we are
2852 working on frame matrices or not. */
2855 set_frame_matrix_frame (f
)
2858 frame_matrix_frame
= f
;
2862 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2863 DESIRED_MATRIX is the desired matrix corresponding to
2864 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2865 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2866 frame_matrix_frame is non-null, this indicates that the exchange is
2867 done in frame matrices, and that we have to perform analogous
2868 operations in window matrices of frame_matrix_frame. */
2871 make_current (desired_matrix
, current_matrix
, row
)
2872 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2875 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2876 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2877 int mouse_face_p
= current_row
->mouse_face_p
;
2879 /* Do current_row = desired_row. This exchanges glyph pointers
2880 between both rows, and does a structure assignment otherwise. */
2881 assign_row (current_row
, desired_row
);
2883 /* Enable current_row to mark it as valid. */
2884 current_row
->enabled_p
= 1;
2885 current_row
->mouse_face_p
= mouse_face_p
;
2887 /* If we are called on frame matrices, perform analogous operations
2888 for window matrices. */
2889 if (frame_matrix_frame
)
2890 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2894 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2895 W's frame which has been made current (by swapping pointers between
2896 current and desired matrix). Perform analogous operations in the
2897 matrices of leaf windows in the window tree rooted at W. */
2900 mirror_make_current (w
, frame_row
)
2906 if (!NILP (w
->hchild
))
2907 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2908 else if (!NILP (w
->vchild
))
2909 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2912 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2913 here because the checks performed in debug mode there
2914 will not allow the conversion. */
2915 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2917 /* If FRAME_ROW is within W, assign the desired row to the
2918 current row (exchanging glyph pointers). */
2919 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2921 struct glyph_row
*current_row
2922 = MATRIX_ROW (w
->current_matrix
, row
);
2923 struct glyph_row
*desired_row
2924 = MATRIX_ROW (w
->desired_matrix
, row
);
2926 if (desired_row
->enabled_p
)
2927 assign_row (current_row
, desired_row
);
2929 swap_glyph_pointers (desired_row
, current_row
);
2930 current_row
->enabled_p
= 1;
2934 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2939 /* Perform row dance after scrolling. We are working on the range of
2940 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2941 including) in MATRIX. COPY_FROM is a vector containing, for each
2942 row I in the range 0 <= I < NLINES, the index of the original line
2943 to move to I. This index is relative to the row range, i.e. 0 <=
2944 index < NLINES. RETAINED_P is a vector containing zero for each
2945 row 0 <= I < NLINES which is empty.
2947 This function is called from do_scrolling and do_direct_scrolling. */
2950 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2952 struct glyph_matrix
*matrix
;
2953 int unchanged_at_top
, nlines
;
2957 /* A copy of original rows. */
2958 struct glyph_row
*old_rows
;
2960 /* Rows to assign to. */
2961 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2965 /* Make a copy of the original rows. */
2966 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2967 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2969 /* Assign new rows, maybe clear lines. */
2970 for (i
= 0; i
< nlines
; ++i
)
2972 int enabled_before_p
= new_rows
[i
].enabled_p
;
2974 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2975 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2976 new_rows
[i
] = old_rows
[copy_from
[i
]];
2977 new_rows
[i
].enabled_p
= enabled_before_p
;
2979 /* RETAINED_P is zero for empty lines. */
2980 if (!retained_p
[copy_from
[i
]])
2981 new_rows
[i
].enabled_p
= 0;
2984 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2985 if (frame_matrix_frame
)
2986 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2987 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2991 /* Synchronize glyph pointers in the current matrix of window W with
2992 the current frame matrix. W must be full-width, and be on a tty
2996 sync_window_with_frame_matrix_rows (w
)
2999 struct frame
*f
= XFRAME (w
->frame
);
3000 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3002 /* Preconditions: W must be a leaf window and full-width. Its frame
3003 must have a frame matrix. */
3004 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3005 xassert (WINDOW_FULL_WIDTH_P (w
));
3006 xassert (!FRAME_WINDOW_P (f
));
3008 /* If W is a full-width window, glyph pointers in W's current matrix
3009 have, by definition, to be the same as glyph pointers in the
3010 corresponding frame matrix. */
3011 window_row
= w
->current_matrix
->rows
;
3012 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3013 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
3014 while (window_row
< window_row_end
)
3018 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
3019 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
3021 ++window_row
, ++frame_row
;
3026 /* Return the window in the window tree rooted in W containing frame
3027 row ROW. Value is null if none is found. */
3030 frame_row_to_window (w
, row
)
3034 struct window
*found
= NULL
;
3038 if (!NILP (w
->hchild
))
3039 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3040 else if (!NILP (w
->vchild
))
3041 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3042 else if (row
>= XFASTINT (w
->top
)
3043 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3046 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3053 /* Perform a line dance in the window tree rooted at W, after
3054 scrolling a frame matrix in mirrored_line_dance.
3056 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3057 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3058 COPY_FROM is a vector containing, for each row I in the range 0 <=
3059 I < NLINES, the index of the original line to move to I. This
3060 index is relative to the row range, i.e. 0 <= index < NLINES.
3061 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3065 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3067 int unchanged_at_top
, nlines
;
3073 if (!NILP (w
->hchild
))
3074 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3075 nlines
, copy_from
, retained_p
);
3076 else if (!NILP (w
->vchild
))
3077 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3078 nlines
, copy_from
, retained_p
);
3081 /* W is a leaf window, and we are working on its current
3083 struct glyph_matrix
*m
= w
->current_matrix
;
3085 struct glyph_row
*old_rows
;
3087 /* Make a copy of the original rows of matrix m. */
3088 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3089 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3091 for (i
= 0; i
< nlines
; ++i
)
3093 /* Frame relative line assigned to. */
3094 int frame_to
= i
+ unchanged_at_top
;
3096 /* Frame relative line assigned. */
3097 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3099 /* Window relative line assigned to. */
3100 int window_to
= frame_to
- m
->matrix_y
;
3102 /* Window relative line assigned. */
3103 int window_from
= frame_from
- m
->matrix_y
;
3105 /* Is assigned line inside window? */
3106 int from_inside_window_p
3107 = window_from
>= 0 && window_from
< m
->matrix_h
;
3109 /* Is assigned to line inside window? */
3110 int to_inside_window_p
3111 = window_to
>= 0 && window_to
< m
->matrix_h
;
3113 if (from_inside_window_p
&& to_inside_window_p
)
3115 /* Enabled setting before assignment. */
3116 int enabled_before_p
;
3118 /* Do the assignment. The enabled_p flag is saved
3119 over the assignment because the old redisplay did
3121 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3122 m
->rows
[window_to
] = old_rows
[window_from
];
3123 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3125 /* If frame line is empty, window line is empty, too. */
3126 if (!retained_p
[copy_from
[i
]])
3127 m
->rows
[window_to
].enabled_p
= 0;
3129 else if (to_inside_window_p
)
3131 /* A copy between windows. This is an infrequent
3132 case not worth optimizing. */
3133 struct frame
*f
= XFRAME (w
->frame
);
3134 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3136 struct glyph_matrix
*m2
;
3139 w2
= frame_row_to_window (root
, frame_to
);
3140 m2
= w2
->current_matrix
;
3141 m2_from
= frame_from
- m2
->matrix_y
;
3142 copy_row_except_pointers (m
->rows
+ window_to
,
3143 m2
->rows
+ m2_from
);
3145 /* If frame line is empty, window line is empty, too. */
3146 if (!retained_p
[copy_from
[i
]])
3147 m
->rows
[window_to
].enabled_p
= 0;
3150 else if (from_inside_window_p
)
3154 /* If there was a copy between windows, make sure glyph
3155 pointers are in sync with the frame matrix. */
3157 sync_window_with_frame_matrix_rows (w
);
3159 /* Check that no pointers are lost. */
3163 /* Next window on same level. */
3164 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3171 /* Check that window and frame matrices agree about their
3172 understanding where glyphs of the rows are to find. For each
3173 window in the window tree rooted at W, check that rows in the
3174 matrices of leaf window agree with their frame matrices about
3178 check_window_matrix_pointers (w
)
3183 if (!NILP (w
->hchild
))
3184 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3185 else if (!NILP (w
->vchild
))
3186 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3189 struct frame
*f
= XFRAME (w
->frame
);
3190 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3191 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3194 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3199 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3200 a window and FRAME_MATRIX is the corresponding frame matrix. For
3201 each row in WINDOW_MATRIX check that it's a slice of the
3202 corresponding frame row. If it isn't, abort. */
3205 check_matrix_pointers (window_matrix
, frame_matrix
)
3206 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3208 /* Row number in WINDOW_MATRIX. */
3211 /* Row number corresponding to I in FRAME_MATRIX. */
3212 int j
= window_matrix
->matrix_y
;
3214 /* For all rows check that the row in the window matrix is a
3215 slice of the row in the frame matrix. If it isn't we didn't
3216 mirror an operation on the frame matrix correctly. */
3217 while (i
< window_matrix
->nrows
)
3219 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3220 frame_matrix
->rows
+ j
))
3226 #endif /* GLYPH_DEBUG != 0 */
3230 /**********************************************************************
3231 VPOS and HPOS translations
3232 **********************************************************************/
3236 /* Translate vertical position VPOS which is relative to window W to a
3237 vertical position relative to W's frame. */
3240 window_to_frame_vpos (w
, vpos
)
3244 struct frame
*f
= XFRAME (w
->frame
);
3246 xassert (!FRAME_WINDOW_P (f
));
3247 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3248 vpos
+= XFASTINT (w
->top
);
3249 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3254 /* Translate horizontal position HPOS which is relative to window W to
3255 a vertical position relative to W's frame. */
3258 window_to_frame_hpos (w
, hpos
)
3262 struct frame
*f
= XFRAME (w
->frame
);
3264 xassert (!FRAME_WINDOW_P (f
));
3265 hpos
+= XFASTINT (w
->left
);
3269 #endif /* GLYPH_DEBUG */
3273 /**********************************************************************
3275 **********************************************************************/
3277 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3278 "Clear frame FRAME and output again what is supposed to appear on it.")
3284 CHECK_LIVE_FRAME (frame
, 0);
3287 /* Ignore redraw requests, if frame has no glyphs yet.
3288 (Implementation note: It still has to be checked why we are
3289 called so early here). */
3290 if (!glyphs_initialized_initially_p
)
3294 if (FRAME_MSDOS_P (f
))
3295 set_terminal_modes ();
3297 clear_current_matrices (f
);
3300 windows_or_buffers_changed
++;
3301 /* Mark all windows as inaccurate, so that every window will have
3302 its redisplay done. */
3303 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3304 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3310 /* Redraw frame F. This is nothing more than a call to the Lisp
3311 function redraw-frame. */
3318 XSETFRAME (frame
, f
);
3319 Fredraw_frame (frame
);
3323 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3324 "Clear and redisplay all visible frames.")
3327 Lisp_Object tail
, frame
;
3329 FOR_EACH_FRAME (tail
, frame
)
3330 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3331 Fredraw_frame (frame
);
3337 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3338 visible frames marked as garbaged. */
3341 redraw_garbaged_frames ()
3343 Lisp_Object tail
, frame
;
3345 FOR_EACH_FRAME (tail
, frame
)
3346 if (FRAME_VISIBLE_P (XFRAME (frame
))
3347 && FRAME_GARBAGED_P (XFRAME (frame
)))
3348 Fredraw_frame (frame
);
3353 /***********************************************************************
3355 ***********************************************************************/
3357 /* Try to update display and current glyph matrix directly.
3359 This function is called after a character G has been inserted into
3360 current_buffer. It tries to update the current glyph matrix and
3361 perform appropriate screen output to reflect the insertion. If it
3362 succeeds, the global flag redisplay_performed_directly_p will be
3363 set to 1, and thereby prevent the more costly general redisplay
3364 from running (see redisplay_internal).
3366 This function is not called for `hairy' character insertions.
3367 In particular, it is not called when after or before change
3368 functions exist, like they are used by font-lock. See keyboard.c
3369 for details where this function is called. */
3372 direct_output_for_insert (g
)
3375 register struct frame
*f
= SELECTED_FRAME ();
3376 struct window
*w
= XWINDOW (selected_window
);
3378 struct glyph_row
*glyph_row
;
3379 struct glyph
*glyphs
, *glyph
, *end
;
3381 /* Non-null means that Redisplay of W is based on window matrices. */
3382 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3383 /* Non-null means we are in overwrite mode. */
3384 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3386 struct text_pos pos
;
3387 int delta
, delta_bytes
;
3389 /* Not done directly. */
3390 redisplay_performed_directly_p
= 0;
3392 /* Quickly give up for some common cases. */
3393 if (cursor_in_echo_area
3394 /* Give up if fonts have changed. */
3396 /* Give up if face attributes have been changed. */
3397 || face_change_count
3398 /* Give up if cursor position not really known. */
3399 || !display_completed
3400 /* Give up if buffer appears in two places. */
3401 || buffer_shared
> 1
3402 /* Give up if currently displaying a message instead of the
3403 minibuffer contents. */
3404 || (EQ (selected_window
, minibuf_window
)
3405 && EQ (minibuf_window
, echo_area_window
))
3406 /* Give up for hscrolled mini-buffer because display of the prompt
3407 is handled specially there (see display_line). */
3408 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3409 /* Give up if overwriting in the middle of a line. */
3412 && FETCH_BYTE (PT
) != '\n')
3413 /* Give up for tabs and line ends. */
3417 /* Give up if unable to display the cursor in the window. */
3418 || w
->cursor
.vpos
< 0
3419 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3420 /* Can't do it in a continued line because continuation
3421 lines would change. */
3422 (glyph_row
->continued_p
3423 /* Can't use this method if the line overlaps others or is
3424 overlapped by others because these other lines would
3425 have to be redisplayed. */
3426 || glyph_row
->overlapping_p
3427 || glyph_row
->overlapped_p
))
3428 /* Can't do it for partial width windows on terminal frames
3429 because we can't clear to eol in such a window. */
3430 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3433 /* If we can't insert glyphs, we can use this method only
3434 at the end of a line. */
3435 if (!char_ins_del_ok
)
3436 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3439 /* Set up a display iterator structure for W. Glyphs will be
3440 produced in scratch_glyph_row. Current position is W's cursor
3442 clear_glyph_row (&scratch_glyph_row
);
3443 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3444 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3445 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3448 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3449 if (glyph_row
->mouse_face_p
)
3452 /* Give up if highlighting trailing whitespace and we have trailing
3453 whitespace in glyph_row. We would have to remove the trailing
3454 whitespace face in that case. */
3455 if (!NILP (Vshow_trailing_whitespace
)
3456 && glyph_row
->used
[TEXT_AREA
])
3460 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3461 if (last
->type
== STRETCH_GLYPH
3462 || (last
->type
== CHAR_GLYPH
3463 && last
->u
.ch
== ' '))
3467 /* Give up if there are overlay strings at pos. This would fail
3468 if the overlay string has newlines in it. */
3469 if (STRINGP (it
.string
))
3472 it
.hpos
= w
->cursor
.hpos
;
3473 it
.vpos
= w
->cursor
.vpos
;
3474 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3475 it
.current_y
= w
->cursor
.y
;
3476 it
.end_charpos
= PT
;
3477 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3479 /* More than one display element may be returned for PT - 1 if
3480 (i) it's a control character which is translated into `\003' or
3481 `^C', or (ii) it has a display table entry, or (iii) it's a
3482 combination of both. */
3483 delta
= delta_bytes
= 0;
3484 while (get_next_display_element (&it
))
3486 PRODUCE_GLYPHS (&it
);
3488 /* Give up if glyph doesn't fit completely on the line. */
3489 if (it
.current_x
>= it
.last_visible_x
)
3492 /* Give up if new glyph has different ascent or descent than
3493 the original row, or if it is not a character glyph. */
3494 if (glyph_row
->ascent
!= it
.ascent
3495 || glyph_row
->height
!= it
.ascent
+ it
.descent
3496 || glyph_row
->phys_ascent
!= it
.phys_ascent
3497 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3498 || it
.what
!= IT_CHARACTER
)
3502 delta_bytes
+= it
.len
;
3503 set_iterator_to_next (&it
, 1);
3506 /* Give up if we hit the right edge of the window. We would have
3507 to insert truncation or continuation glyphs. */
3508 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3509 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3512 /* Give up if there is a \t following in the line. */
3514 it2
.end_charpos
= ZV
;
3515 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3516 while (get_next_display_element (&it2
)
3517 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3521 set_iterator_to_next (&it2
, 1);
3524 /* Number of new glyphs produced. */
3525 n
= it
.glyph_row
->used
[TEXT_AREA
];
3527 /* Start and end of glyphs in original row. */
3528 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3529 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3531 /* Make room for new glyphs, then insert them. */
3532 xassert (end
- glyphs
- n
>= 0);
3533 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3534 (end
- glyphs
- n
) * sizeof (*end
));
3535 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3536 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3537 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3539 /* Compute new line width. */
3540 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3541 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3542 glyph_row
->pixel_width
= glyph_row
->x
;
3545 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3549 /* Increment buffer positions for glyphs following the newly
3551 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3552 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3553 glyph
->charpos
+= delta
;
3555 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3557 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3558 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3561 /* Adjust positions in lines following the one we are in. */
3562 increment_matrix_positions (w
->current_matrix
,
3564 w
->current_matrix
->nrows
,
3565 delta
, delta_bytes
);
3567 glyph_row
->contains_overlapping_glyphs_p
3568 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3570 glyph_row
->displays_text_p
= 1;
3571 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3572 XFASTINT (w
->window_end_vpos
)));
3574 if (!NILP (Vshow_trailing_whitespace
))
3575 highlight_trailing_whitespace (it
.f
, glyph_row
);
3577 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3578 In the middle, we have to insert glyphs. Note that this is now
3579 implemented for X frames. The implementation uses updated_window
3581 updated_row
= glyph_row
;
3585 rif
->update_window_begin_hook (w
);
3587 if (glyphs
== end
- n
3588 /* In front of a space added by append_space. */
3589 || (glyphs
== end
- n
- 1
3590 && (end
- n
)->charpos
<= 0))
3591 rif
->write_glyphs (glyphs
, n
);
3593 rif
->insert_glyphs (glyphs
, n
);
3597 if (glyphs
== end
- n
)
3598 write_glyphs (glyphs
, n
);
3600 insert_glyphs (glyphs
, n
);
3603 w
->cursor
.hpos
+= n
;
3604 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3605 xassert (w
->cursor
.hpos
>= 0
3606 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3608 /* How to set the cursor differs depending on whether we are
3609 using a frame matrix or a window matrix. Note that when
3610 a frame matrix is used, cursor_to expects frame coordinates,
3611 and the X and Y parameters are not used. */
3612 if (window_redisplay_p
)
3613 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3614 w
->cursor
.y
, w
->cursor
.x
);
3618 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3619 + (INTEGERP (w
->left_margin_width
)
3620 ? XFASTINT (w
->left_margin_width
)
3622 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3627 rif
->update_window_end_hook (w
, 1, 0);
3632 TRACE ((stderr
, "direct output for insert\n"));
3634 UNCHANGED_MODIFIED
= MODIFF
;
3635 BEG_UNCHANGED
= GPT
- BEG
;
3636 XSETFASTINT (w
->last_point
, PT
);
3637 w
->last_cursor
= w
->cursor
;
3638 XSETFASTINT (w
->last_modified
, MODIFF
);
3639 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3641 redisplay_performed_directly_p
= 1;
3646 /* Perform a direct display update for moving PT by N positions
3647 left or right. N < 0 means a movement backwards. This function
3648 is currently only called for N == 1 or N == -1. */
3651 direct_output_forward_char (n
)
3654 struct frame
*f
= SELECTED_FRAME ();
3655 struct window
*w
= XWINDOW (selected_window
);
3656 struct glyph_row
*row
;
3658 /* Give up if point moved out of or into a composition. */
3659 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3660 current_buffer
, PT
))
3663 /* Give up if face attributes have been changed. */
3664 if (face_change_count
)
3667 /* Give up if current matrix is not up to date or we are
3668 displaying a message. */
3669 if (!display_completed
|| cursor_in_echo_area
)
3672 /* Give up if the buffer's direction is reversed. */
3673 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3676 /* Can't use direct output if highlighting a region. */
3677 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3680 /* Can't use direct output if highlighting trailing whitespace. */
3681 if (!NILP (Vshow_trailing_whitespace
))
3684 /* Give up if we are showing a message or just cleared the message
3685 because we might need to resize the echo area window. */
3686 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3689 /* Give up if currently displaying a message instead of the
3690 minibuffer contents. */
3691 if (XWINDOW (minibuf_window
) == w
3692 && EQ (minibuf_window
, echo_area_window
))
3695 /* Give up if we don't know where the cursor is. */
3696 if (w
->cursor
.vpos
< 0)
3699 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3701 /* Give up if PT is outside of the last known cursor row. */
3702 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3703 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3706 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3708 w
->last_cursor
= w
->cursor
;
3709 XSETFASTINT (w
->last_point
, PT
);
3711 xassert (w
->cursor
.hpos
>= 0
3712 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3714 if (FRAME_WINDOW_P (f
))
3715 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3716 w
->cursor
.y
, w
->cursor
.x
);
3720 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3721 + (INTEGERP (w
->left_margin_width
)
3722 ? XFASTINT (w
->left_margin_width
)
3724 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3729 redisplay_performed_directly_p
= 1;
3735 /***********************************************************************
3737 ***********************************************************************/
3739 /* Update frame F based on the data in desired matrices.
3741 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3742 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3745 Value is non-zero if redisplay was stopped due to pending input. */
3748 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3751 int inhibit_hairy_id_p
;
3753 /* 1 means display has been paused because of pending input. */
3755 struct window
*root_window
= XWINDOW (f
->root_window
);
3757 if (FRAME_WINDOW_P (f
))
3759 /* We are working on window matrix basis. All windows whose
3760 flag must_be_updated_p is set have to be updated. */
3762 /* Record that we are not working on frame matrices. */
3763 set_frame_matrix_frame (NULL
);
3765 /* Update all windows in the window tree of F, maybe stopping
3766 when pending input is detected. */
3769 /* Update the menu bar on X frames that don't have toolkit
3771 if (WINDOWP (f
->menu_bar_window
))
3772 update_window (XWINDOW (f
->menu_bar_window
), 1);
3774 /* Update the tool-bar window, if present. */
3775 if (WINDOWP (f
->tool_bar_window
))
3778 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3780 /* Update tool-bar window. */
3781 if (w
->must_be_updated_p
)
3783 update_window (w
, 1);
3784 w
->must_be_updated_p
= 0;
3786 /* Swap tool-bar strings. We swap because we want to
3788 tem
= f
->current_tool_bar_string
;
3789 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3790 f
->desired_tool_bar_string
= tem
;
3795 /* Update windows. */
3796 paused_p
= update_window_tree (root_window
, force_p
);
3799 #if 0 /* This flush is a performance bottleneck under X,
3800 and it doesn't seem to be necessary anyway. */
3801 rif
->flush_display (f
);
3806 /* We are working on frame matrix basis. Set the frame on whose
3807 frame matrix we operate. */
3808 set_frame_matrix_frame (f
);
3810 /* Build F's desired matrix from window matrices. */
3811 build_frame_matrix (f
);
3813 /* Update the display */
3815 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3819 fflush (termscript
);
3822 /* Check window matrices for lost pointers. */
3824 check_window_matrix_pointers (root_window
);
3825 add_frame_display_history (f
, paused_p
);
3829 /* Reset flags indicating that a window should be updated. */
3830 set_window_update_flags (root_window
, 0);
3832 display_completed
= !paused_p
;
3838 /************************************************************************
3839 Window-based updates
3840 ************************************************************************/
3842 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3843 don't stop updating when input is pending. */
3846 update_window_tree (w
, force_p
)
3852 while (w
&& !paused_p
)
3854 if (!NILP (w
->hchild
))
3855 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3856 else if (!NILP (w
->vchild
))
3857 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3858 else if (w
->must_be_updated_p
)
3859 paused_p
|= update_window (w
, force_p
);
3861 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3868 /* Update window W if its flag must_be_updated_p is non-zero. If
3869 FORCE_P is non-zero, don't stop updating if input is pending. */
3872 update_single_window (w
, force_p
)
3876 if (w
->must_be_updated_p
)
3878 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3880 /* Record that this is not a frame-based redisplay. */
3881 set_frame_matrix_frame (NULL
);
3885 update_window (w
, force_p
);
3888 /* Reset flag in W. */
3889 w
->must_be_updated_p
= 0;
3894 /* Redraw lines from the current matrix of window W that are
3895 overlapped by other rows. YB is bottom-most y-position in W. */
3898 redraw_overlapped_rows (w
, yb
)
3904 /* If rows overlapping others have been changed, the rows being
3905 overlapped have to be redrawn. This won't draw lines that have
3906 already been drawn in update_window_line because overlapped_p in
3907 desired rows is 0, so after row assignment overlapped_p in
3908 current rows is 0. */
3909 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3911 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3913 if (!row
->enabled_p
)
3915 else if (row
->mode_line_p
)
3918 if (row
->overlapped_p
)
3920 enum glyph_row_area area
;
3922 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3925 updated_area
= area
;
3926 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3927 if (row
->used
[area
])
3928 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3929 rif
->clear_end_of_line (-1);
3932 row
->overlapped_p
= 0;
3935 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3941 /* Redraw lines from the current matrix of window W that overlap
3942 others. YB is bottom-most y-position in W. */
3945 redraw_overlapping_rows (w
, yb
)
3950 struct glyph_row
*row
;
3952 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3954 row
= w
->current_matrix
->rows
+ i
;
3956 if (!row
->enabled_p
)
3958 else if (row
->mode_line_p
)
3961 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3963 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3965 if (row
->used
[LEFT_MARGIN_AREA
])
3966 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3968 if (row
->used
[TEXT_AREA
])
3969 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3971 if (row
->used
[RIGHT_MARGIN_AREA
])
3972 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3974 /* Record in neighbor rows that ROW overwrites part of their
3976 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3977 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3978 if ((row
->phys_height
- row
->phys_ascent
3979 > row
->height
- row
->ascent
)
3981 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3992 /* Check that no row in the current matrix of window W is enabled
3993 which is below what's displayed in the window. */
3996 check_current_matrix_flags (w
)
3999 int last_seen_p
= 0;
4000 int i
, yb
= window_text_bottom_y (w
);
4002 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4004 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4005 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4007 else if (last_seen_p
&& row
->enabled_p
)
4012 #endif /* GLYPH_DEBUG */
4015 /* Update display of window W. FORCE_P non-zero means that we should
4016 not stop when detecting pending input. */
4019 update_window (w
, force_p
)
4023 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4025 int preempt_count
= baud_rate
/ 2400 + 1;
4026 extern int input_pending
;
4027 extern Lisp_Object do_mouse_tracking
;
4029 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4030 extern struct frame
*updating_frame
;
4033 /* Check that W's frame doesn't have glyph matrices. */
4034 xassert (FRAME_WINDOW_P (f
));
4035 xassert (updating_frame
!= NULL
);
4037 /* Check pending input the first time so that we can quickly return. */
4038 if (redisplay_dont_pause
)
4041 detect_input_pending ();
4043 /* If forced to complete the update, or if no input is pending, do
4045 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4047 struct glyph_row
*row
, *end
;
4048 struct glyph_row
*mode_line_row
;
4049 struct glyph_row
*header_line_row
= NULL
;
4050 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4052 rif
->update_window_begin_hook (w
);
4053 yb
= window_text_bottom_y (w
);
4055 /* If window has a top line, update it before everything else.
4056 Adjust y-positions of other rows by the top line height. */
4057 row
= desired_matrix
->rows
;
4058 end
= row
+ desired_matrix
->nrows
- 1;
4059 if (row
->mode_line_p
)
4060 header_line_row
= row
++;
4062 /* Update the mode line, if necessary. */
4063 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4064 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4066 mode_line_row
->y
= yb
;
4067 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4069 &mouse_face_overwritten_p
);
4073 /* Find first enabled row. Optimizations in redisplay_internal
4074 may lead to an update with only one row enabled. There may
4075 be also completely empty matrices. */
4076 while (row
< end
&& !row
->enabled_p
)
4079 /* Try reusing part of the display by copying. */
4080 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4082 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4085 /* All rows were found to be equal. */
4094 /* Update the top mode line after scrolling because a new top
4095 line would otherwise overwrite lines at the top of the window
4096 that can be scrolled. */
4097 if (header_line_row
&& header_line_row
->enabled_p
)
4099 header_line_row
->y
= 0;
4100 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4104 /* Update the rest of the lines. */
4105 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4108 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4111 /* We'll Have to play a little bit with when to
4112 detect_input_pending. If it's done too often,
4113 scrolling large windows with repeated scroll-up
4114 commands will too quickly pause redisplay. */
4115 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4116 detect_input_pending ();
4118 changed_p
|= update_window_line (w
, vpos
,
4119 &mouse_face_overwritten_p
);
4121 /* Mark all rows below the last visible one in the current
4122 matrix as invalid. This is necessary because of
4123 variable line heights. Consider the case of three
4124 successive redisplays, where the first displays 5
4125 lines, the second 3 lines, and the third 5 lines again.
4126 If the second redisplay wouldn't mark rows in the
4127 current matrix invalid, the third redisplay might be
4128 tempted to optimize redisplay based on lines displayed
4129 in the first redisplay. */
4130 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4131 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4132 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4135 /* Was display preempted? */
4136 paused_p
= row
< end
;
4140 /* Fix the appearance of overlapping(overlapped rows. */
4141 if (!paused_p
&& !w
->pseudo_window_p
)
4143 if (changed_p
&& rif
->fix_overlapping_area
)
4145 redraw_overlapped_rows (w
, yb
);
4146 redraw_overlapping_rows (w
, yb
);
4149 /* Make cursor visible at cursor position of W. */
4150 set_window_cursor_after_update (w
);
4152 #if 0 /* Check that current matrix invariants are satisfied. This is
4153 for debugging only. See the comment of check_matrix_invariants. */
4154 IF_DEBUG (check_matrix_invariants (w
));
4159 /* Remember the redisplay method used to display the matrix. */
4160 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4163 /* End of update of window W. */
4164 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
4170 /* check_current_matrix_flags (w); */
4171 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4174 clear_glyph_matrix (desired_matrix
);
4180 /* Update the display of area AREA in window W, row number VPOS.
4181 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4184 update_marginal_area (w
, area
, vpos
)
4188 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4190 /* Let functions in xterm.c know what area subsequent X positions
4191 will be relative to. */
4192 updated_area
= area
;
4194 /* Set cursor to start of glyphs, write them, and clear to the end
4195 of the area. I don't think that something more sophisticated is
4196 necessary here, since marginal areas will not be the default. */
4197 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4198 if (desired_row
->used
[area
])
4199 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4200 rif
->clear_end_of_line (-1);
4204 /* Update the display of the text area of row VPOS in window W.
4205 Value is non-zero if display has changed. */
4208 update_text_area (w
, vpos
)
4212 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4213 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4216 /* Let functions in xterm.c know what area subsequent X positions
4217 will be relative to. */
4218 updated_area
= TEXT_AREA
;
4220 /* If rows are at different X or Y, or rows have different height,
4221 or the current row is marked invalid, write the entire line. */
4222 if (!current_row
->enabled_p
4223 || desired_row
->y
!= current_row
->y
4224 || desired_row
->ascent
!= current_row
->ascent
4225 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4226 || desired_row
->phys_height
!= current_row
->phys_height
4227 || desired_row
->visible_height
!= current_row
->visible_height
4228 || current_row
->overlapped_p
4229 || current_row
->mouse_face_p
4230 || current_row
->x
!= desired_row
->x
)
4232 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4234 if (desired_row
->used
[TEXT_AREA
])
4235 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4236 desired_row
->used
[TEXT_AREA
]);
4238 /* Clear to end of window. */
4239 rif
->clear_end_of_line (-1);
4245 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4246 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4247 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4248 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4250 /* If the desired row extends its face to the text area end,
4251 make sure we write at least one glyph, so that the face
4252 extension actually takes place. */
4253 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4256 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4260 /* Loop over glyphs that current and desired row may have
4266 /* Skip over glyphs that both rows have in common. These
4267 don't have to be written. We can't skip if the last
4268 current glyph overlaps the glyph to its right. For
4269 example, consider a current row of `if ' with the `f' in
4270 Courier bold so that it overlaps the ` ' to its right.
4271 If the desired row is ` ', we would skip over the space
4272 after the `if' and there would remain a pixel from the
4273 `f' on the screen. */
4274 if (overlapping_glyphs_p
&& i
> 0)
4276 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4279 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4281 can_skip_p
= right
== 0;
4287 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4289 x
+= desired_glyph
->pixel_width
;
4290 ++desired_glyph
, ++current_glyph
, ++i
;
4293 /* Consider the case that the current row contains "xxx
4294 ppp ggg" in italic Courier font, and the desired row
4295 is "xxx ggg". The character `p' has lbearing, `g'
4296 has not. The loop above will stop in front of the
4297 first `p' in the current row. If we would start
4298 writing glyphs there, we wouldn't erase the lbearing
4299 of the `p'. The rest of the lbearing problem is then
4300 taken care of by x_draw_glyphs. */
4301 if (overlapping_glyphs_p
4303 && i
< current_row
->used
[TEXT_AREA
]
4304 && (current_row
->used
[TEXT_AREA
]
4305 != desired_row
->used
[TEXT_AREA
]))
4309 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4311 while (left
> 0 && i
> 0)
4313 --i
, --desired_glyph
, --current_glyph
;
4314 x
-= desired_glyph
->pixel_width
;
4315 left
-= desired_glyph
->pixel_width
;
4320 /* Try to avoid writing the entire rest of the desired row
4321 by looking for a resync point. This mainly prevents
4322 mode line flickering in the case the mode line is in
4323 fixed-pitch font, which it usually will be. */
4324 if (i
< desired_row
->used
[TEXT_AREA
])
4326 int start_x
= x
, start_hpos
= i
;
4327 struct glyph
*start
= desired_glyph
;
4329 int skip_first_p
= !can_skip_p
;
4331 /* Find the next glyph that's equal again. */
4334 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4337 x
+= desired_glyph
->pixel_width
;
4338 current_x
+= current_glyph
->pixel_width
;
4339 ++desired_glyph
, ++current_glyph
, ++i
;
4343 if (i
== start_hpos
|| x
!= current_x
)
4347 desired_glyph
= start
;
4351 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4352 rif
->write_glyphs (start
, i
- start_hpos
);
4357 /* Write the rest. */
4358 if (i
< desired_row
->used
[TEXT_AREA
])
4360 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4361 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4365 /* Maybe clear to end of line. */
4366 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4368 /* If new row extends to the end of the text area, nothing
4369 has to be cleared, if and only if we did a write_glyphs
4370 above. This is made sure by setting desired_stop_pos
4371 appropriately above. */
4372 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4374 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4376 /* If old row extends to the end of the text area, clear. */
4377 if (i
>= desired_row
->used
[TEXT_AREA
])
4378 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4379 desired_row
->x
+ desired_row
->pixel_width
);
4380 rif
->clear_end_of_line (-1);
4383 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4385 /* Otherwise clear to the end of the old row. Everything
4386 after that position should be clear already. */
4389 if (i
>= desired_row
->used
[TEXT_AREA
])
4390 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4391 desired_row
->x
+ desired_row
->pixel_width
);
4393 /* If cursor is displayed at the end of the line, make sure
4394 it's cleared. Nowadays we don't have a phys_cursor_glyph
4395 with which to erase the cursor (because this method
4396 doesn't work with lbearing/rbearing), so we must do it
4398 if (vpos
== w
->phys_cursor
.vpos
4399 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4401 w
->phys_cursor_on_p
= 0;
4405 x
= current_row
->x
+ current_row
->pixel_width
;
4406 rif
->clear_end_of_line (x
);
4415 /* Update row VPOS in window W. Value is non-zero if display has been
4419 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4421 int vpos
, *mouse_face_overwritten_p
;
4423 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4424 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4427 /* Set the row being updated. This is important to let xterm.c
4428 know what line height values are in effect. */
4429 updated_row
= desired_row
;
4431 /* A row can be completely invisible in case a desired matrix was
4432 built with a vscroll and then make_cursor_line_fully_visible shifts
4433 the matrix. Make sure to make such rows current anyway, since
4434 we need the correct y-position, for example, in the current matrix. */
4435 if (desired_row
->mode_line_p
4436 || desired_row
->visible_height
> 0)
4438 xassert (desired_row
->enabled_p
);
4440 /* Update display of the left margin area, if there is one. */
4441 if (!desired_row
->full_width_p
4442 && !NILP (w
->left_margin_width
))
4445 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4448 /* Update the display of the text area. */
4449 if (update_text_area (w
, vpos
))
4452 if (current_row
->mouse_face_p
)
4453 *mouse_face_overwritten_p
= 1;
4456 /* Update display of the right margin area, if there is one. */
4457 if (!desired_row
->full_width_p
4458 && !NILP (w
->right_margin_width
))
4461 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4464 /* Draw truncation marks etc. */
4465 if (!current_row
->enabled_p
4466 || desired_row
->y
!= current_row
->y
4467 || desired_row
->visible_height
!= current_row
->visible_height
4468 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4469 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4470 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4471 || desired_row
->continued_p
!= current_row
->continued_p
4472 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4473 || (desired_row
->indicate_empty_line_p
4474 != current_row
->indicate_empty_line_p
)
4475 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4476 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4477 rif
->after_update_window_line_hook (desired_row
);
4480 /* Update current_row from desired_row. */
4481 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4487 /* Set the cursor after an update of window W. This function may only
4488 be called from update_window. */
4491 set_window_cursor_after_update (w
)
4494 struct frame
*f
= XFRAME (w
->frame
);
4495 int cx
, cy
, vpos
, hpos
;
4497 /* Not intended for frame matrix updates. */
4498 xassert (FRAME_WINDOW_P (f
));
4500 if (cursor_in_echo_area
4501 && !NILP (echo_area_buffer
[0])
4502 /* If we are showing a message instead of the mini-buffer,
4503 show the cursor for the message instead. */
4504 && XWINDOW (minibuf_window
) == w
4505 && EQ (minibuf_window
, echo_area_window
)
4506 /* These cases apply only to the frame that contains
4507 the active mini-buffer window. */
4508 && FRAME_HAS_MINIBUF_P (f
)
4509 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4511 cx
= cy
= vpos
= hpos
= 0;
4513 if (cursor_in_echo_area
>= 0)
4515 /* If the mini-buffer is several lines high, find the last
4516 line that has any text on it. Note: either all lines
4517 are enabled or none. Otherwise we wouldn't be able to
4519 struct glyph_row
*row
, *last_row
;
4520 struct glyph
*glyph
;
4521 int yb
= window_text_bottom_y (w
);
4524 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4528 if (row
->used
[TEXT_AREA
]
4529 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4532 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4538 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4539 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4541 while (last
> start
&& last
->charpos
< 0)
4544 for (glyph
= start
; glyph
< last
; ++glyph
)
4546 cx
+= glyph
->pixel_width
;
4551 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4559 hpos
= w
->cursor
.hpos
;
4560 vpos
= w
->cursor
.vpos
;
4563 /* Window cursor can be out of sync for horizontally split windows. */
4564 hpos
= max (0, hpos
);
4565 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4566 vpos
= max (0, vpos
);
4567 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4568 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4572 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4573 tree rooted at W. */
4576 set_window_update_flags (w
, on_p
)
4582 if (!NILP (w
->hchild
))
4583 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4584 else if (!NILP (w
->vchild
))
4585 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4587 w
->must_be_updated_p
= on_p
;
4589 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4595 /***********************************************************************
4596 Window-Based Scrolling
4597 ***********************************************************************/
4599 /* Structure describing rows in scrolling_window. */
4603 /* Number of occurrences of this row in desired and current matrix. */
4604 int old_uses
, new_uses
;
4606 /* Vpos of row in new matrix. */
4607 int new_line_number
;
4609 /* Bucket index of this row_entry in the hash table row_table. */
4612 /* The row described by this entry. */
4613 struct glyph_row
*row
;
4615 /* Hash collision chain. */
4616 struct row_entry
*next
;
4619 /* A pool to allocate row_entry structures from, and the size of the
4620 pool. The pool is reallocated in scrolling_window when we find
4621 that we need a larger one. */
4623 static struct row_entry
*row_entry_pool
;
4624 static int row_entry_pool_size
;
4626 /* Index of next free entry in row_entry_pool. */
4628 static int row_entry_idx
;
4630 /* The hash table used during scrolling, and the table's size. This
4631 table is used to quickly identify equal rows in the desired and
4634 static struct row_entry
**row_table
;
4635 static int row_table_size
;
4637 /* Vectors of pointers to row_entry structures belonging to the
4638 current and desired matrix, and the size of the vectors. */
4640 static struct row_entry
**old_lines
, **new_lines
;
4641 static int old_lines_size
, new_lines_size
;
4643 /* A pool to allocate run structures from, and its size. */
4645 static struct run
*run_pool
;
4646 static int runs_size
;
4648 /* A vector of runs of lines found during scrolling. */
4650 static struct run
**runs
;
4652 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4653 struct glyph_row
*));
4656 /* Add glyph row ROW to the scrolling hash table during the scrolling
4659 static INLINE
struct row_entry
*
4660 add_row_entry (w
, row
)
4662 struct glyph_row
*row
;
4664 struct row_entry
*entry
;
4665 int i
= row
->hash
% row_table_size
;
4667 entry
= row_table
[i
];
4668 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4669 entry
= entry
->next
;
4673 entry
= row_entry_pool
+ row_entry_idx
++;
4675 entry
->old_uses
= entry
->new_uses
= 0;
4676 entry
->new_line_number
= 0;
4678 entry
->next
= row_table
[i
];
4679 row_table
[i
] = entry
;
4686 /* Try to reuse part of the current display of W by scrolling lines.
4687 HEADER_LINE_P non-zero means W has a top mode line.
4689 The algorithm is taken from Communications of the ACM, Apr78 "A
4690 Technique for Isolating Differences Between Files." It should take
4693 A short outline of the steps of the algorithm
4695 1. Skip lines equal at the start and end of both matrices.
4697 2. Enter rows in the current and desired matrix into a symbol
4698 table, counting how often they appear in both matrices.
4700 3. Rows that appear exactly once in both matrices serve as anchors,
4701 i.e. we assume that such lines are likely to have been moved.
4703 4. Starting from anchor lines, extend regions to be scrolled both
4704 forward and backward.
4708 -1 if all rows were found to be equal.
4709 0 to indicate that we did not scroll the display, or
4710 1 if we did scroll. */
4713 scrolling_window (w
, header_line_p
)
4717 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4718 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4719 int yb
= window_text_bottom_y (w
);
4720 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4721 int nruns
, nbytes
, n
, run_idx
;
4722 struct row_entry
*entry
;
4724 /* Skip over rows equal at the start. */
4725 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4727 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4728 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4733 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4734 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4735 && row_equal_p (w
, c
, d
, 1))
4744 /* Give up if some rows in the desired matrix are not enabled. */
4745 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4748 first_old
= first_new
= i
;
4750 /* Set last_new to the index + 1 of the last enabled row in the
4753 while (i
< desired_matrix
->nrows
- 1
4754 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4755 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4758 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4763 /* Set last_old to the index + 1 of the last enabled row in the
4764 current matrix. We don't look at the enabled flag here because
4765 we plan to reuse part of the display even if other parts are
4768 while (i
< current_matrix
->nrows
- 1)
4770 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4779 /* Skip over rows equal at the bottom. */
4782 while (i
- 1 > first_new
4783 && j
- 1 > first_old
4784 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4785 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4786 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4788 MATRIX_ROW (desired_matrix
, i
- 1),
4789 MATRIX_ROW (current_matrix
, j
- 1), 1))
4794 /* Nothing to do if all rows are equal. */
4795 if (last_new
== first_new
)
4798 /* Reallocate vectors, tables etc. if necessary. */
4800 if (current_matrix
->nrows
> old_lines_size
)
4802 old_lines_size
= current_matrix
->nrows
;
4803 nbytes
= old_lines_size
* sizeof *old_lines
;
4804 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4807 if (desired_matrix
->nrows
> new_lines_size
)
4809 new_lines_size
= desired_matrix
->nrows
;
4810 nbytes
= new_lines_size
* sizeof *new_lines
;
4811 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4814 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4815 if (3 * n
> row_table_size
)
4817 row_table_size
= next_almost_prime (3 * n
);
4818 nbytes
= row_table_size
* sizeof *row_table
;
4819 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4820 bzero (row_table
, nbytes
);
4823 if (n
> row_entry_pool_size
)
4825 row_entry_pool_size
= n
;
4826 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4827 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4830 if (desired_matrix
->nrows
> runs_size
)
4832 runs_size
= desired_matrix
->nrows
;
4833 nbytes
= runs_size
* sizeof *runs
;
4834 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4835 nbytes
= runs_size
* sizeof *run_pool
;
4836 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4839 nruns
= run_idx
= 0;
4842 /* Add rows from the current and desired matrix to the hash table
4843 row_hash_table to be able to find equal ones quickly. */
4845 for (i
= first_old
; i
< last_old
; ++i
)
4847 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4849 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4850 old_lines
[i
] = entry
;
4854 old_lines
[i
] = NULL
;
4857 for (i
= first_new
; i
< last_new
; ++i
)
4859 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4860 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4862 entry
->new_line_number
= i
;
4863 new_lines
[i
] = entry
;
4866 /* Identify moves based on lines that are unique and equal
4867 in both matrices. */
4868 for (i
= first_old
; i
< last_old
;)
4870 && old_lines
[i
]->old_uses
== 1
4871 && old_lines
[i
]->new_uses
== 1)
4874 int new_line
= old_lines
[i
]->new_line_number
;
4875 struct run
*run
= run_pool
+ run_idx
++;
4878 run
->current_vpos
= i
;
4879 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4880 run
->desired_vpos
= new_line
;
4881 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4883 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4885 /* Extend backward. */
4888 while (j
> first_old
4890 && old_lines
[j
] == new_lines
[k
])
4892 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4893 --run
->current_vpos
;
4894 --run
->desired_vpos
;
4897 run
->desired_y
-= h
;
4898 run
->current_y
-= h
;
4902 /* Extend forward. */
4907 && old_lines
[j
] == new_lines
[k
])
4909 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4915 /* Insert run into list of all runs. Order runs by copied
4916 pixel lines. Note that we record runs that don't have to
4917 be copied because they are already in place. This is done
4918 because we can avoid calling update_window_line in this
4920 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4922 for (k
= nruns
; k
> j
; --k
)
4923 runs
[k
] = runs
[k
- 1];
4932 /* Do the moves. Do it in a way that we don't overwrite something
4933 we want to copy later on. This is not solvable in general
4934 because there is only one display and we don't have a way to
4935 exchange areas on this display. Example:
4937 +-----------+ +-----------+
4939 +-----------+ --> +-----------+
4941 +-----------+ +-----------+
4943 Instead, prefer bigger moves, and invalidate moves that would
4944 copy from where we copied to. */
4946 for (i
= 0; i
< nruns
; ++i
)
4947 if (runs
[i
]->nrows
> 0)
4949 struct run
*r
= runs
[i
];
4951 /* Copy on the display. */
4952 if (r
->current_y
!= r
->desired_y
)
4954 rif
->scroll_run_hook (w
, r
);
4956 /* Invalidate runs that copy from where we copied to. */
4957 for (j
= i
+ 1; j
< nruns
; ++j
)
4959 struct run
*p
= runs
[j
];
4961 if ((p
->current_y
>= r
->desired_y
4962 && p
->current_y
< r
->desired_y
+ r
->height
)
4963 || (p
->current_y
+ p
->height
>= r
->desired_y
4964 && (p
->current_y
+ p
->height
4965 < r
->desired_y
+ r
->height
)))
4970 /* Assign matrix rows. */
4971 for (j
= 0; j
< r
->nrows
; ++j
)
4973 struct glyph_row
*from
, *to
;
4974 int to_overlapped_p
;
4976 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4977 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4978 to_overlapped_p
= to
->overlapped_p
;
4979 assign_row (to
, from
);
4980 to
->enabled_p
= 1, from
->enabled_p
= 0;
4981 to
->overlapped_p
= to_overlapped_p
;
4985 /* Clear the hash table, for the next time. */
4986 for (i
= 0; i
< row_entry_idx
; ++i
)
4987 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4989 /* Value is non-zero to indicate that we scrolled the display. */
4995 /************************************************************************
4997 ************************************************************************/
4999 /* Update the desired frame matrix of frame F.
5001 FORCE_P non-zero means that the update should not be stopped by
5002 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5003 should not be tried.
5005 Value is non-zero if update was stopped due to pending input. */
5008 update_frame_1 (f
, force_p
, inhibit_id_p
)
5013 /* Frame matrices to work on. */
5014 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5015 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5018 int preempt_count
= baud_rate
/ 2400 + 1;
5019 extern int input_pending
;
5021 xassert (current_matrix
&& desired_matrix
);
5023 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5024 calculate_costs (f
);
5026 if (preempt_count
<= 0)
5029 if (redisplay_dont_pause
)
5031 else if (!force_p
&& detect_input_pending ())
5037 /* If we cannot insert/delete lines, it's no use trying it. */
5038 if (!line_ins_del_ok
)
5041 /* See if any of the desired lines are enabled; don't compute for
5042 i/d line if just want cursor motion. */
5043 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5044 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5047 /* Try doing i/d line, if not yet inhibited. */
5048 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5049 force_p
|= scrolling (f
);
5051 /* Update the individual lines as needed. Do bottom line first. */
5052 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5053 update_frame_line (f
, desired_matrix
->nrows
- 1);
5055 /* Now update the rest of the lines. */
5056 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5058 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5060 if (FRAME_TERMCAP_P (f
))
5062 /* Flush out every so many lines.
5063 Also flush out if likely to have more than 1k buffered
5064 otherwise. I'm told that some telnet connections get
5065 really screwed by more than 1k output at once. */
5066 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5068 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5071 if (preempt_count
== 1)
5073 #ifdef EMACS_OUTQSIZE
5074 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5075 /* Probably not a tty. Ignore the error and reset
5076 * the outq count. */
5077 outq
= PENDING_OUTPUT_COUNT (stdout
);
5080 if (baud_rate
<= outq
&& baud_rate
> 0)
5081 sleep (outq
/ baud_rate
);
5086 if ((i
- 1) % preempt_count
== 0)
5087 detect_input_pending ();
5089 update_frame_line (f
, i
);
5093 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5095 /* Now just clean up termcap drivers and set cursor, etc. */
5098 if ((cursor_in_echo_area
5099 /* If we are showing a message instead of the mini-buffer,
5100 show the cursor for the message instead of for the
5101 (now hidden) mini-buffer contents. */
5102 || (EQ (minibuf_window
, selected_window
)
5103 && EQ (minibuf_window
, echo_area_window
)
5104 && !NILP (echo_area_buffer
[0])))
5105 /* These cases apply only to the frame that contains
5106 the active mini-buffer window. */
5107 && FRAME_HAS_MINIBUF_P (f
)
5108 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5110 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5113 if (cursor_in_echo_area
< 0)
5115 /* Negative value of cursor_in_echo_area means put
5116 cursor at beginning of line. */
5122 /* Positive value of cursor_in_echo_area means put
5123 cursor at the end of the prompt. If the mini-buffer
5124 is several lines high, find the last line that has
5126 row
= FRAME_HEIGHT (f
);
5132 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5134 /* Frame rows are filled up with spaces that
5135 must be ignored here. */
5136 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5138 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5139 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5142 && (last
- 1)->charpos
< 0)
5148 while (row
> top
&& col
== 0);
5150 /* Make sure COL is not out of range. */
5151 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5153 /* If we have another row, advance cursor into it. */
5154 if (row
< FRAME_HEIGHT (f
) - 1)
5156 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5159 /* Otherwise move it back in range. */
5161 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5165 cursor_to (row
, col
);
5169 /* We have only one cursor on terminal frames. Use it to
5170 display the cursor of the selected window. */
5171 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5172 if (w
->cursor
.vpos
>= 0
5173 /* The cursor vpos may be temporarily out of bounds
5174 in the following situation: There is one window,
5175 with the cursor in the lower half of it. The window
5176 is split, and a message causes a redisplay before
5177 a new cursor position has been computed. */
5178 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5180 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5181 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5183 if (INTEGERP (w
->left_margin_width
))
5184 x
+= XFASTINT (w
->left_margin_width
);
5186 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5194 clear_desired_matrices (f
);
5199 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5203 struct frame
*frame
;
5205 int unchanged_at_top
, unchanged_at_bottom
;
5208 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5209 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5210 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5211 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5213 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5214 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5215 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5217 if (!current_matrix
)
5220 /* Compute hash codes of all the lines. Also calculate number of
5221 changed lines, number of unchanged lines at the beginning, and
5222 number of unchanged lines at the end. */
5224 unchanged_at_top
= 0;
5225 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5226 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5228 /* Give up on this scrolling if some old lines are not enabled. */
5229 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5231 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5232 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5234 /* This line cannot be redrawn, so don't let scrolling mess it. */
5235 new_hash
[i
] = old_hash
[i
];
5236 #define INFINITY 1000000 /* Taken from scroll.c */
5237 draw_cost
[i
] = INFINITY
;
5241 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5242 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5245 if (old_hash
[i
] != new_hash
[i
])
5248 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5250 else if (i
== unchanged_at_top
)
5252 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5255 /* If changed lines are few, don't allow preemption, don't scroll. */
5256 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5257 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5260 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5261 - unchanged_at_bottom
);
5263 if (scroll_region_ok
)
5264 free_at_end_vpos
-= unchanged_at_bottom
;
5265 else if (memory_below_frame
)
5266 free_at_end_vpos
= -1;
5268 /* If large window, fast terminal and few lines in common between
5269 current frame and desired frame, don't bother with i/d calc. */
5270 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5272 10 * scrolling_max_lines_saved (unchanged_at_top
,
5273 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5274 old_hash
, new_hash
, draw_cost
)))
5277 if (window_size
< 2)
5280 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5281 draw_cost
+ unchanged_at_top
- 1,
5282 old_draw_cost
+ unchanged_at_top
- 1,
5283 old_hash
+ unchanged_at_top
- 1,
5284 new_hash
+ unchanged_at_top
- 1,
5285 free_at_end_vpos
- unchanged_at_top
);
5291 /* Count the number of blanks at the start of the vector of glyphs R
5292 which is LEN glyphs long. */
5295 count_blanks (r
, len
)
5301 for (i
= 0; i
< len
; ++i
)
5302 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5309 /* Count the number of glyphs in common at the start of the glyph
5310 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5311 of STR2. Value is the number of equal glyphs equal at the start. */
5314 count_match (str1
, end1
, str2
, end2
)
5315 struct glyph
*str1
, *end1
, *str2
, *end2
;
5317 struct glyph
*p1
= str1
;
5318 struct glyph
*p2
= str2
;
5322 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5329 /* Char insertion/deletion cost vector, from term.c */
5331 extern int *char_ins_del_vector
;
5332 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5335 /* Perform a frame-based update on line VPOS in frame FRAME. */
5338 update_frame_line (f
, vpos
)
5342 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5344 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5345 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5346 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5347 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5348 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5349 int must_write_whole_line_p
;
5350 int write_spaces_p
= must_write_spaces
;
5351 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5352 != FACE_TTY_DEFAULT_BG_COLOR
);
5354 if (colored_spaces_p
)
5357 if (desired_row
->inverse_p
5358 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5360 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5361 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5362 current_row
->enabled_p
= 0;
5365 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5367 /* Current row not enabled means it has unknown contents. We must
5368 write the whole desired line in that case. */
5369 must_write_whole_line_p
= !current_row
->enabled_p
;
5370 if (must_write_whole_line_p
)
5377 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5378 olen
= current_row
->used
[TEXT_AREA
];
5380 if (!current_row
->inverse_p
)
5382 /* Ignore trailing spaces, if we can. */
5383 if (!write_spaces_p
)
5384 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5389 /* For an inverse-video line, make sure it's filled with
5390 spaces all the way to the frame edge so that the reverse
5391 video extends all the way across. */
5392 while (olen
< FRAME_WIDTH (f
) - 1)
5393 obody
[olen
++] = space_glyph
;
5397 current_row
->enabled_p
= 1;
5398 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5399 current_row
->inverse_p
= desired_row
->inverse_p
;
5401 /* If desired line is empty, just clear the line. */
5402 if (!desired_row
->enabled_p
)
5408 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5409 nlen
= desired_row
->used
[TEXT_AREA
];
5410 nend
= nbody
+ nlen
;
5412 /* If display line has unknown contents, write the whole line. */
5413 if (must_write_whole_line_p
)
5415 /* Ignore spaces at the end, if we can. */
5416 if (!write_spaces_p
)
5417 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5420 /* Write the contents of the desired line. */
5423 cursor_to (vpos
, 0);
5424 write_glyphs (nbody
, nlen
);
5427 /* Don't call clear_end_of_line if we already wrote the whole
5428 line. The cursor will not be at the right margin in that
5429 case but in the line below. */
5430 if (nlen
< FRAME_WINDOW_WIDTH (f
))
5432 cursor_to (vpos
, nlen
);
5433 clear_end_of_line (FRAME_WINDOW_WIDTH (f
));
5436 /* Make sure we are in the right row, otherwise cursor movement
5437 with cmgoto might use `ch' in the wrong row. */
5438 cursor_to (vpos
, 0);
5440 make_current (desired_matrix
, current_matrix
, vpos
);
5444 /* Pretend trailing spaces are not there at all,
5445 unless for one reason or another we must write all spaces. */
5446 if (!desired_row
->inverse_p
)
5448 if (!write_spaces_p
)
5449 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5454 /* For an inverse-video line, give it extra trailing spaces all
5455 the way to the frame edge so that the reverse video extends
5456 all the way across. */
5457 while (nlen
< FRAME_WIDTH (f
) - 1)
5458 nbody
[nlen
++] = space_glyph
;
5461 /* If there's no i/d char, quickly do the best we can without it. */
5462 if (!char_ins_del_ok
)
5466 /* Find the first glyph in desired row that doesn't agree with
5467 a glyph in the current row, and write the rest from there on. */
5468 for (i
= 0; i
< nlen
; i
++)
5470 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5472 /* Find the end of the run of different glyphs. */
5476 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5477 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5480 /* Output this run of non-matching chars. */
5481 cursor_to (vpos
, i
);
5482 write_glyphs (nbody
+ i
, j
- i
);
5485 /* Now find the next non-match. */
5489 /* Clear the rest of the line, or the non-clear part of it. */
5492 cursor_to (vpos
, nlen
);
5493 clear_end_of_line (olen
);
5496 /* Make current row = desired row. */
5497 make_current (desired_matrix
, current_matrix
, vpos
);
5501 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5502 characters in a row. */
5506 /* If current line is blank, skip over initial spaces, if
5507 possible, and write the rest. */
5508 if (write_spaces_p
|| desired_row
->inverse_p
)
5511 nsp
= count_blanks (nbody
, nlen
);
5515 cursor_to (vpos
, nsp
);
5516 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5519 /* Exchange contents between current_frame and new_frame. */
5520 make_current (desired_matrix
, current_matrix
, vpos
);
5524 /* Compute number of leading blanks in old and new contents. */
5525 osp
= count_blanks (obody
, olen
);
5526 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5528 : count_blanks (nbody
, nlen
));
5530 /* Compute number of matching chars starting with first non-blank. */
5531 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5532 nbody
+ nsp
, nbody
+ nlen
);
5534 /* Spaces in new match implicit space past the end of old. */
5535 /* A bug causing this to be a no-op was fixed in 18.29. */
5536 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5539 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5543 /* Avoid doing insert/delete char
5544 just cause number of leading spaces differs
5545 when the following text does not match. */
5546 if (begmatch
== 0 && osp
!= nsp
)
5547 osp
= nsp
= min (osp
, nsp
);
5549 /* Find matching characters at end of line */
5552 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5554 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5559 endmatch
= obody
+ olen
- op1
;
5561 /* tem gets the distance to insert or delete.
5562 endmatch is how many characters we save by doing so.
5565 tem
= (nlen
- nsp
) - (olen
- osp
);
5567 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5570 /* nsp - osp is the distance to insert or delete.
5571 If that is nonzero, begmatch is known to be nonzero also.
5572 begmatch + endmatch is how much we save by doing the ins/del.
5576 && (!char_ins_del_ok
5577 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5581 osp
= nsp
= min (osp
, nsp
);
5584 /* Now go through the line, inserting, writing and
5585 deleting as appropriate. */
5589 cursor_to (vpos
, nsp
);
5590 delete_glyphs (osp
- nsp
);
5594 /* If going to delete chars later in line
5595 and insert earlier in the line,
5596 must delete first to avoid losing data in the insert */
5597 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5599 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5600 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5601 olen
= nlen
- (nsp
- osp
);
5603 cursor_to (vpos
, osp
);
5604 insert_glyphs (0, nsp
- osp
);
5608 tem
= nsp
+ begmatch
+ endmatch
;
5609 if (nlen
!= tem
|| olen
!= tem
)
5611 if (!endmatch
|| nlen
== olen
)
5613 /* If new text being written reaches right margin, there is
5614 no need to do clear-to-eol at the end of this function
5615 (and it would not be safe, since cursor is not going to
5616 be "at the margin" after the text is done). */
5617 if (nlen
== FRAME_WINDOW_WIDTH (f
))
5620 /* Function write_glyphs is prepared to do nothing
5621 if passed a length <= 0. Check it here to avoid
5622 unnecessary cursor movement. */
5625 cursor_to (vpos
, nsp
+ begmatch
);
5626 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5629 else if (nlen
> olen
)
5631 /* Here, we used to have the following simple code:
5632 ----------------------------------------
5633 write_glyphs (nbody + nsp + begmatch, olen - tem);
5634 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5635 ----------------------------------------
5636 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5637 is a padding glyph. */
5638 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5641 cursor_to (vpos
, nsp
+ begmatch
);
5643 /* Calculate columns we can actually overwrite. */
5644 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5646 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5648 /* If we left columns to be overwritten, we must delete them. */
5649 del
= olen
- tem
- out
;
5651 delete_glyphs (del
);
5653 /* At last, we insert columns not yet written out. */
5654 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5657 else if (olen
> nlen
)
5659 cursor_to (vpos
, nsp
+ begmatch
);
5660 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5661 delete_glyphs (olen
- nlen
);
5667 /* If any unerased characters remain after the new line, erase them. */
5670 cursor_to (vpos
, nlen
);
5671 clear_end_of_line (olen
);
5674 /* Exchange contents between current_frame and new_frame. */
5675 make_current (desired_matrix
, current_matrix
, vpos
);
5680 /***********************************************************************
5681 X/Y Position -> Buffer Position
5682 ***********************************************************************/
5684 /* Return the character position of the character at window relative
5685 pixel position (*X, *Y). *X and *Y are adjusted to character
5689 buffer_posn_from_coords (w
, x
, y
)
5694 struct buffer
*old_current_buffer
= current_buffer
;
5695 struct text_pos startp
;
5696 int left_area_width
;
5698 current_buffer
= XBUFFER (w
->buffer
);
5699 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5700 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5701 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5702 start_display (&it
, w
, startp
);
5704 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5705 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5706 MOVE_TO_X
| MOVE_TO_Y
);
5708 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5710 current_buffer
= old_current_buffer
;
5711 return IT_CHARPOS (it
);
5715 /* Value is the string under window-relative coordinates X/Y in the
5716 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5717 means look at the mode line. *CHARPOS is set to the position in
5718 the string returned. */
5721 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5723 int x
, y
, mode_line_p
;
5726 struct glyph_row
*row
;
5727 struct glyph
*glyph
, *end
;
5728 struct frame
*f
= XFRAME (w
->frame
);
5730 Lisp_Object string
= Qnil
;
5733 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5735 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5737 if (row
->mode_line_p
&& row
->enabled_p
)
5739 /* The mode lines are displayed over scroll bars and bitmap
5740 areas, and X is window-relative. Correct X by the scroll bar
5741 and bitmap area width. */
5742 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5743 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5744 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5746 /* Find the glyph under X. If we find one with a string object,
5747 it's the one we were looking for. */
5748 glyph
= row
->glyphs
[TEXT_AREA
];
5749 end
= glyph
+ row
->used
[TEXT_AREA
];
5750 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5751 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5753 string
= glyph
->object
;
5754 *charpos
= glyph
->charpos
;
5763 /***********************************************************************
5764 Changing Frame Sizes
5765 ***********************************************************************/
5770 window_change_signal (signalnum
) /* If we don't have an argument, */
5771 int signalnum
; /* some compilers complain in signal calls. */
5777 int old_errno
= errno
;
5779 get_frame_size (&width
, &height
);
5781 /* The frame size change obviously applies to a termcap-controlled
5782 frame. Find such a frame in the list, and assume it's the only
5783 one (since the redisplay code always writes to stdout, not a
5784 FILE * specified in the frame structure). Record the new size,
5785 but don't reallocate the data structures now. Let that be done
5786 later outside of the signal handler. */
5789 Lisp_Object tail
, frame
;
5791 FOR_EACH_FRAME (tail
, frame
)
5793 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5795 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5801 signal (SIGWINCH
, window_change_signal
);
5804 #endif /* SIGWINCH */
5807 /* Do any change in frame size that was requested by a signal. SAFE
5808 non-zero means this function is called from a place where it is
5809 safe to change frame sizes while a redisplay is in progress. */
5812 do_pending_window_change (safe
)
5815 /* If window_change_signal should have run before, run it now. */
5816 if (redisplaying_p
&& !safe
)
5819 while (delayed_size_change
)
5821 Lisp_Object tail
, frame
;
5823 delayed_size_change
= 0;
5825 FOR_EACH_FRAME (tail
, frame
)
5827 struct frame
*f
= XFRAME (frame
);
5829 int height
= FRAME_NEW_HEIGHT (f
);
5830 int width
= FRAME_NEW_WIDTH (f
);
5832 if (height
!= 0 || width
!= 0)
5833 change_frame_size (f
, height
, width
, 0, 0, safe
);
5839 /* Change the frame height and/or width. Values may be given as zero to
5840 indicate no change is to take place.
5842 If DELAY is non-zero, then assume we're being called from a signal
5843 handler, and queue the change for later - perhaps the next
5844 redisplay. Since this tries to resize windows, we can't call it
5845 from a signal handler.
5847 SAFE non-zero means this function is called from a place where it's
5848 safe to change frame sizes while a redisplay is in progress. */
5851 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5852 register struct frame
*f
;
5853 int newheight
, newwidth
, pretend
, delay
, safe
;
5855 Lisp_Object tail
, frame
;
5857 if (! FRAME_WINDOW_P (f
))
5859 /* When using termcap, or on MS-DOS, all frames use
5860 the same screen, so a change in size affects all frames. */
5861 FOR_EACH_FRAME (tail
, frame
)
5862 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5863 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5864 pretend
, delay
, safe
);
5867 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5871 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5872 register struct frame
*f
;
5873 int newheight
, newwidth
, pretend
, delay
, safe
;
5875 int new_frame_window_width
;
5876 int count
= specpdl_ptr
- specpdl
;
5878 /* If we can't deal with the change now, queue it for later. */
5879 if (delay
|| (redisplaying_p
&& !safe
))
5881 FRAME_NEW_HEIGHT (f
) = newheight
;
5882 FRAME_NEW_WIDTH (f
) = newwidth
;
5883 delayed_size_change
= 1;
5887 /* This size-change overrides any pending one for this frame. */
5888 FRAME_NEW_HEIGHT (f
) = 0;
5889 FRAME_NEW_WIDTH (f
) = 0;
5891 /* If an argument is zero, set it to the current value. */
5893 newheight
= FRAME_HEIGHT (f
);
5895 newwidth
= FRAME_WIDTH (f
);
5897 /* Compute width of windows in F.
5898 This is the width of the frame without vertical scroll bars. */
5899 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5901 /* Round up to the smallest acceptable size. */
5902 check_frame_size (f
, &newheight
, &newwidth
);
5904 /* If we're not changing the frame size, quit now. */
5905 if (newheight
== FRAME_HEIGHT (f
)
5906 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5912 /* We only can set screen dimensions to certain values supported
5913 by our video hardware. Try to find the smallest size greater
5914 or equal to the requested dimensions. */
5915 dos_set_window_size (&newheight
, &newwidth
);
5918 if (newheight
!= FRAME_HEIGHT (f
))
5920 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5922 /* Frame has both root and mini-buffer. */
5923 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5924 FRAME_TOP_MARGIN (f
));
5925 set_window_height (FRAME_ROOT_WINDOW (f
),
5928 - FRAME_TOP_MARGIN (f
)),
5930 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5932 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5935 /* Frame has just one top-level window. */
5936 set_window_height (FRAME_ROOT_WINDOW (f
),
5937 newheight
- FRAME_TOP_MARGIN (f
), 0);
5939 if (FRAME_TERMCAP_P (f
) && !pretend
)
5940 FrameRows
= newheight
;
5943 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5945 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5946 if (FRAME_HAS_MINIBUF_P (f
))
5947 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5949 if (FRAME_TERMCAP_P (f
) && !pretend
)
5950 FrameCols
= newwidth
;
5952 if (WINDOWP (f
->tool_bar_window
))
5953 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5956 FRAME_HEIGHT (f
) = newheight
;
5957 SET_FRAME_WIDTH (f
, newwidth
);
5960 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5961 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5963 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5965 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5966 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5967 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5968 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5972 SET_FRAME_GARBAGED (f
);
5973 calculate_costs (f
);
5977 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5979 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5980 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5981 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5983 unbind_to (count
, Qnil
);
5988 /***********************************************************************
5989 Terminal Related Lisp Functions
5990 ***********************************************************************/
5992 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5993 1, 1, "FOpen termscript file: ",
5994 "Start writing all terminal output to FILE as well as the terminal.\n\
5995 FILE = nil means just close any termscript file currently open.")
5999 if (termscript
!= 0) fclose (termscript
);
6004 file
= Fexpand_file_name (file
, Qnil
);
6005 termscript
= fopen (XSTRING (file
)->data
, "w");
6006 if (termscript
== 0)
6007 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6013 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6014 Ssend_string_to_terminal
, 1, 1, 0,
6015 "Send STRING to the terminal without alteration.\n\
6016 Control characters in STRING will have terminal-dependent effects.")
6020 /* ??? Perhaps we should do something special for multibyte strings here. */
6021 CHECK_STRING (string
, 0);
6022 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
6026 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
6028 fflush (termscript
);
6034 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6035 "Beep, or flash the screen.\n\
6036 Also, unless an argument is given,\n\
6037 terminate any keyboard macro currently executing.")
6060 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6061 error ("Keyboard macro terminated by a command ringing the bell");
6069 /***********************************************************************
6071 ***********************************************************************/
6073 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6074 "Pause, without updating display, for SECONDS seconds.\n\
6075 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6076 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6077 additional wait period, in milliseconds; this may be useful if your\n\
6078 Emacs was built without floating point support.\n\
6079 \(Not all operating systems support waiting for a fraction of a second.)")
6080 (seconds
, milliseconds
)
6081 Lisp_Object seconds
, milliseconds
;
6085 if (NILP (milliseconds
))
6086 XSETINT (milliseconds
, 0);
6088 CHECK_NUMBER (milliseconds
, 1);
6089 usec
= XINT (milliseconds
) * 1000;
6092 double duration
= extract_float (seconds
);
6093 sec
= (int) duration
;
6094 usec
+= (duration
- sec
) * 1000000;
6097 #ifndef EMACS_HAS_USECS
6098 if (sec
== 0 && usec
!= 0)
6099 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6102 /* Assure that 0 <= usec < 1000000. */
6105 /* We can't rely on the rounding being correct if user is negative. */
6106 if (-1000000 < usec
)
6107 sec
--, usec
+= 1000000;
6109 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6112 sec
+= usec
/ 1000000, usec
%= 1000000;
6114 if (sec
< 0 || (sec
== 0 && usec
== 0))
6120 XSETFASTINT (zero
, 0);
6121 wait_reading_process_input (sec
, usec
, zero
, 0);
6124 /* We should always have wait_reading_process_input; we have a dummy
6125 implementation for systems which don't support subprocesses. */
6127 /* No wait_reading_process_input */
6134 /* The reason this is done this way
6135 (rather than defined (H_S) && defined (H_T))
6136 is because the VMS preprocessor doesn't grok `defined' */
6138 EMACS_GET_TIME (end_time
);
6139 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6140 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6144 EMACS_GET_TIME (timeout
);
6145 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6146 if (EMACS_TIME_NEG_P (timeout
)
6147 || !select (1, 0, 0, 0, &timeout
))
6150 #else /* not HAVE_SELECT */
6152 #endif /* HAVE_SELECT */
6153 #endif /* not VMS */
6156 #endif /* no subprocesses */
6162 /* This is just like wait_reading_process_input, except that
6163 it does the redisplay.
6165 It's also much like Fsit_for, except that it can be used for
6166 waiting for input as well. */
6169 sit_for (sec
, usec
, reading
, display
, initial_display
)
6170 int sec
, usec
, reading
, display
, initial_display
;
6172 Lisp_Object read_kbd
;
6174 swallow_events (display
);
6176 if (detect_input_pending_run_timers (display
))
6179 if (initial_display
)
6180 redisplay_preserve_echo_area (2);
6182 if (sec
== 0 && usec
== 0)
6189 XSETINT (read_kbd
, reading
? -1 : 1);
6190 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6192 return detect_input_pending () ? Qnil
: Qt
;
6196 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6197 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
6198 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6199 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6200 additional wait period, in milliseconds; this may be useful if your\n\
6201 Emacs was built without floating point support.\n\
6202 \(Not all operating systems support waiting for a fraction of a second.)\n\
6203 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
6204 Redisplay is preempted as always if input arrives, and does not happen\n\
6205 if input is available before it starts.\n\
6206 Value is t if waited the full time with no input arriving.")
6207 (seconds
, milliseconds
, nodisp
)
6208 Lisp_Object seconds
, milliseconds
, nodisp
;
6212 if (NILP (milliseconds
))
6213 XSETINT (milliseconds
, 0);
6215 CHECK_NUMBER (milliseconds
, 1);
6216 usec
= XINT (milliseconds
) * 1000;
6219 double duration
= extract_float (seconds
);
6220 sec
= (int) duration
;
6221 usec
+= (duration
- sec
) * 1000000;
6224 #ifndef EMACS_HAS_USECS
6225 if (usec
!= 0 && sec
== 0)
6226 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6229 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6234 /***********************************************************************
6235 Other Lisp Functions
6236 ***********************************************************************/
6238 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6239 session's frames, frame names, buffers, buffer-read-only flags, and
6240 buffer-modified-flags, and a trailing sentinel (so we don't need to
6241 add length checks). */
6243 static Lisp_Object frame_and_buffer_state
;
6246 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6247 Sframe_or_buffer_changed_p
, 0, 0, 0,
6248 "Return non-nil if the frame and buffer state appears to have changed.\n\
6249 The state variable is an internal vector containing all frames and buffers,\n\
6250 aside from buffers whose names start with space,\n\
6251 along with the buffers' read-only and modified flags, which allows a fast\n\
6252 check to see whether the menu bars might need to be recomputed.\n\
6253 If this function returns non-nil, it updates the internal vector to reflect\n\
6254 the current state.\n")
6257 Lisp_Object tail
, frame
, buf
;
6261 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6262 FOR_EACH_FRAME (tail
, frame
)
6264 if (!EQ (*vecp
++, frame
))
6266 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6269 /* Check that the buffer info matches.
6270 No need to test for the end of the vector
6271 because the last element of the vector is lambda
6272 and that will always cause a mismatch. */
6273 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6275 buf
= XCDR (XCAR (tail
));
6276 /* Ignore buffers that aren't included in buffer lists. */
6277 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6279 if (!EQ (*vecp
++, buf
))
6281 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6283 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6286 /* Detect deletion of a buffer at the end of the list. */
6287 if (EQ (*vecp
, Qlambda
))
6290 /* Start with 1 so there is room for at least one lambda at the end. */
6292 FOR_EACH_FRAME (tail
, frame
)
6294 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6296 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6297 if (n
> XVECTOR (frame_and_buffer_state
)->size
6298 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6299 /* Add 20 extra so we grow it less often. */
6300 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6301 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6302 FOR_EACH_FRAME (tail
, frame
)
6305 *vecp
++ = XFRAME (frame
)->name
;
6307 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6309 buf
= XCDR (XCAR (tail
));
6310 /* Ignore buffers that aren't included in buffer lists. */
6311 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6314 *vecp
++ = XBUFFER (buf
)->read_only
;
6315 *vecp
++ = Fbuffer_modified_p (buf
);
6317 /* Fill up the vector with lambdas (always at least one). */
6319 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6320 < XVECTOR (frame_and_buffer_state
)->size
)
6322 /* Make sure we didn't overflow the vector. */
6323 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6324 > XVECTOR (frame_and_buffer_state
)->size
)
6331 /***********************************************************************
6333 ***********************************************************************/
6335 char *terminal_type
;
6337 /* Initialization done when Emacs fork is started, before doing stty.
6338 Determine terminal type and set terminal_driver. Then invoke its
6339 decoding routine to set up variables in the terminal package. */
6344 #ifdef HAVE_X_WINDOWS
6345 extern int display_arg
;
6348 /* Construct the space glyph. */
6349 space_glyph
.type
= CHAR_GLYPH
;
6350 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6351 space_glyph
.charpos
= -1;
6355 cursor_in_echo_area
= 0;
6356 terminal_type
= (char *) 0;
6358 /* Now is the time to initialize this; it's used by init_sys_modes
6360 Vwindow_system
= Qnil
;
6362 /* If the user wants to use a window system, we shouldn't bother
6363 initializing the terminal. This is especially important when the
6364 terminal is so dumb that emacs gives up before and doesn't bother
6365 using the window system.
6367 If the DISPLAY environment variable is set and nonempty,
6368 try to use X, and die with an error message if that doesn't work. */
6370 #ifdef HAVE_X_WINDOWS
6375 display
= getenv ("DECW$DISPLAY");
6377 display
= getenv ("DISPLAY");
6380 display_arg
= (display
!= 0 && *display
!= 0);
6383 if (!inhibit_window_system
&& display_arg
6389 Vwindow_system
= intern ("x");
6391 Vwindow_system_version
= make_number (11);
6393 Vwindow_system_version
= make_number (10);
6395 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6396 /* In some versions of ncurses,
6397 tputs crashes if we have not called tgetent.
6399 { char b
[2044]; tgetent (b
, "xterm");}
6401 adjust_frame_glyphs_initially ();
6404 #endif /* HAVE_X_WINDOWS */
6407 if (!inhibit_window_system
)
6409 Vwindow_system
= intern ("w32");
6410 Vwindow_system_version
= make_number (1);
6411 adjust_frame_glyphs_initially ();
6414 #endif /* HAVE_NTGUI */
6417 if (!inhibit_window_system
)
6419 Vwindow_system
= intern ("mac");
6420 Vwindow_system_version
= make_number (1);
6421 adjust_frame_glyphs_initially ();
6424 #endif /* macintosh */
6426 /* If no window system has been specified, try to use the terminal. */
6429 fatal ("standard input is not a tty");
6433 /* Look at the TERM variable */
6434 terminal_type
= (char *) getenv ("TERM");
6438 fprintf (stderr
, "Please specify your terminal type.\n\
6439 For types defined in VMS, use set term /device=TYPE.\n\
6440 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6441 \(The quotation marks are necessary since terminal types are lower case.)\n");
6443 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6449 /* VMS DCL tends to up-case things, so down-case term type.
6450 Hardly any uppercase letters in terminal types; should be none. */
6452 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6455 strcpy (new, terminal_type
);
6457 for (p
= new; *p
; p
++)
6461 terminal_type
= new;
6465 term_init (terminal_type
);
6468 struct frame
*sf
= SELECTED_FRAME ();
6469 int width
= FRAME_WINDOW_WIDTH (sf
);
6470 int height
= FRAME_HEIGHT (sf
);
6472 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6474 /* If these sizes are so big they cause overflow, just ignore the
6475 change. It's not clear what better we could do. */
6476 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6477 fatal ("screen size %dx%d too big", width
, height
);
6480 adjust_frame_glyphs_initially ();
6481 calculate_costs (XFRAME (selected_frame
));
6486 #endif /* CANNOT_DUMP */
6487 signal (SIGWINCH
, window_change_signal
);
6488 #endif /* SIGWINCH */
6490 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6494 /* The MSDOS terminal turns on its ``window system'' relatively
6495 late into the startup, so we cannot do the frame faces'
6496 initialization just yet. It will be done later by pc-win.el
6497 and internal_terminal_init. */
6498 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6500 && NILP (Vwindow_system
))
6502 /* For the initial frame, we don't have any way of knowing what
6503 are the foreground and background colors of the terminal. */
6504 struct frame
*sf
= SELECTED_FRAME();
6506 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6507 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6508 call0 (intern ("tty-set-up-initial-frame-faces"));
6514 /***********************************************************************
6516 ***********************************************************************/
6518 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6519 Sinternal_show_cursor
, 2, 2, 0,
6520 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6521 WINDOW nil means use the selected window. SHOW non-nil means\n\
6522 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6523 don't show a cursor.")
6525 Lisp_Object window
, show
;
6527 /* Don't change cursor state while redisplaying. This could confuse
6529 if (!redisplaying_p
)
6532 window
= selected_window
;
6534 CHECK_WINDOW (window
, 2);
6536 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6543 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6544 Sinternal_show_cursor_p
, 0, 1, 0,
6545 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6546 WINDOW nil or omitted means report on the selected window.")
6553 window
= selected_window
;
6555 CHECK_WINDOW (window
, 2);
6557 w
= XWINDOW (window
);
6558 return w
->cursor_off_p
? Qnil
: Qt
;
6562 /***********************************************************************
6564 ***********************************************************************/
6569 defsubr (&Sredraw_frame
);
6570 defsubr (&Sredraw_display
);
6571 defsubr (&Sframe_or_buffer_changed_p
);
6572 defsubr (&Sopen_termscript
);
6574 defsubr (&Ssit_for
);
6575 defsubr (&Ssleep_for
);
6576 defsubr (&Ssend_string_to_terminal
);
6577 defsubr (&Sinternal_show_cursor
);
6578 defsubr (&Sinternal_show_cursor_p
);
6581 defsubr (&Sdump_redisplay_history
);
6584 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6585 staticpro (&frame_and_buffer_state
);
6587 Qdisplay_table
= intern ("display-table");
6588 staticpro (&Qdisplay_table
);
6589 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6590 staticpro (&Qredisplay_dont_pause
);
6592 DEFVAR_INT ("baud-rate", &baud_rate
,
6593 "*The output baud rate of the terminal.\n\
6594 On most systems, changing this value will affect the amount of padding\n\
6595 and the other strategic decisions made during redisplay.");
6597 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6598 "*Non-nil means invert the entire frame display.\n\
6599 This means everything is in inverse video which otherwise would not be.");
6601 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6602 "*Non-nil means try to flash the frame to represent a bell.");
6604 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6605 "*Non-nil means no need to redraw entire frame after suspending.\n\
6606 A non-nil value is useful if the terminal can automatically preserve\n\
6607 Emacs's frame display when you reenter Emacs.\n\
6608 It is up to you to set this variable if your terminal can do that.");
6610 DEFVAR_LISP ("window-system", &Vwindow_system
,
6611 "A symbol naming the window-system under which Emacs is running\n\
6612 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6614 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6615 "The version number of the window system in use.\n\
6616 For X windows, this is 10 or 11.");
6618 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6619 "Non-nil means put cursor in minibuffer, at end of any message there.");
6621 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6622 "Table defining how to output a glyph code to the frame.\n\
6623 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6624 Each element can be:\n\
6625 integer: a glyph code which this glyph is an alias for.\n\
6626 string: output this glyph using that string (not impl. in X windows).\n\
6627 nil: this glyph mod 256 is char code to output,\n\
6628 and this glyph / 256 is face code for X windows (see `face-id').");
6629 Vglyph_table
= Qnil
;
6631 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6632 "Display table to use for buffers that specify none.\n\
6633 See `buffer-display-table' for more information.");
6634 Vstandard_display_table
= Qnil
;
6636 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6637 "*Non-nil means update isn't paused when input is detected.");
6638 redisplay_dont_pause
= 0;
6640 /* Initialize `window-system', unless init_display already decided it. */
6645 Vwindow_system
= Qnil
;
6646 Vwindow_system_version
= Qnil
;