1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
65 #endif /* macintosh */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static void fake_current_matrices
P_ ((Lisp_Object
));
123 static void redraw_overlapping_rows
P_ ((struct window
*, int));
124 static void redraw_overlapped_rows
P_ ((struct window
*, int));
125 static int count_blanks
P_ ((struct glyph
*, int));
126 static int count_match
P_ ((struct glyph
*, struct glyph
*,
127 struct glyph
*, struct glyph
*));
128 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
129 static void update_frame_line
P_ ((struct frame
*, int));
130 static struct dim allocate_matrices_for_frame_redisplay
131 P_ ((Lisp_Object
, int, int, int, int *));
132 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
133 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
134 static void adjust_frame_glyphs
P_ ((struct frame
*));
135 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
136 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
137 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
138 int, int, struct dim
));
139 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
140 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
144 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
145 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
147 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
149 static struct glyph_pool
*new_glyph_pool
P_ ((void));
150 static void free_glyph_pool
P_ ((struct glyph_pool
*));
151 static void adjust_frame_glyphs_initially
P_ ((void));
152 static void adjust_frame_message_buffer
P_ ((struct frame
*));
153 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
154 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
155 static void build_frame_matrix
P_ ((struct frame
*));
156 void clear_current_matrices
P_ ((struct frame
*));
157 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
159 static void clear_window_matrices
P_ ((struct window
*, int));
160 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
161 static int scrolling_window
P_ ((struct window
*, int));
162 static int update_window_line
P_ ((struct window
*, int, int *));
163 static void update_marginal_area
P_ ((struct window
*, int, int));
164 static int update_text_area
P_ ((struct window
*, int));
165 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
167 static void mirror_make_current
P_ ((struct window
*, int));
168 void check_window_matrix_pointers
P_ ((struct window
*));
170 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
171 struct glyph_matrix
*));
173 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
174 static int update_window_tree
P_ ((struct window
*, int));
175 static int update_window
P_ ((struct window
*, int));
176 static int update_frame_1
P_ ((struct frame
*, int, int));
177 static void set_window_cursor_after_update
P_ ((struct window
*));
178 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
179 struct glyph_row
*, int));
180 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
181 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
182 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
183 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
184 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
185 struct window
*frame_row_to_window
P_ ((struct window
*, int));
188 /* Non-zero means don't pause redisplay for pending input. (This is
189 for debugging and for a future implementation of EDT-like
192 int redisplay_dont_pause
;
194 /* Nonzero upon entry to redisplay means do not assume anything about
195 current contents of actual terminal frame; clear and redraw it. */
199 /* Nonzero means last display completed. Zero means it was preempted. */
201 int display_completed
;
203 /* Lisp variable visible-bell; enables use of screen-flash instead of
208 /* Invert the color of the whole frame, at a low level. */
212 /* Line speed of the terminal. */
216 /* Either nil or a symbol naming the window system under which Emacs
219 Lisp_Object Vwindow_system
;
221 /* Version number of X windows: 10, 11 or nil. */
223 Lisp_Object Vwindow_system_version
;
225 /* Vector of glyph definitions. Indexed by glyph number, the contents
226 are a string which is how to output the glyph.
228 If Vglyph_table is nil, a glyph is output by using its low 8 bits
231 This is an obsolete feature that is no longer used. The variable
232 is retained for compatibility. */
234 Lisp_Object Vglyph_table
;
236 /* Display table to use for vectors that don't specify their own. */
238 Lisp_Object Vstandard_display_table
;
240 /* Nonzero means reading single-character input with prompt so put
241 cursor on mini-buffer after the prompt. positive means at end of
242 text in echo area; negative means at beginning of line. */
244 int cursor_in_echo_area
;
246 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
249 /* The currently selected frame. In a single-frame version, this
250 variable always equals the_only_frame. */
252 Lisp_Object selected_frame
;
254 /* A frame which is not just a mini-buffer, or 0 if there are no such
255 frames. This is usually the most recent such frame that was
256 selected. In a single-frame version, this variable always holds
257 the address of the_only_frame. */
259 struct frame
*last_nonminibuf_frame
;
261 /* Stdio stream being used for copy of all output. */
265 /* Structure for info on cursor positioning. */
269 /* 1 means SIGWINCH happened when not safe. */
271 int delayed_size_change
;
273 /* 1 means glyph initialization has been completed at startup. */
275 static int glyphs_initialized_initially_p
;
277 /* Updated window if != 0. Set by update_window. */
279 struct window
*updated_window
;
281 /* Glyph row updated in update_window_line, and area that is updated. */
283 struct glyph_row
*updated_row
;
286 /* A glyph for a space. */
288 struct glyph space_glyph
;
290 /* Non-zero means update has been performed directly, so that there's
291 no need for redisplay_internal to do much work. Set by
292 direct_output_for_insert. */
294 int redisplay_performed_directly_p
;
296 /* Counts of allocated structures. These counts serve to diagnose
297 memory leaks and double frees. */
299 int glyph_matrix_count
;
300 int glyph_pool_count
;
302 /* If non-null, the frame whose frame matrices are manipulated. If
303 null, window matrices are worked on. */
305 static struct frame
*frame_matrix_frame
;
307 /* Current interface for window-based redisplay. Set from init_xterm.
308 A null value means we are not using window-based redisplay. */
310 struct redisplay_interface
*rif
;
312 /* Non-zero means that fonts have been loaded since the last glyph
313 matrix adjustments. Redisplay must stop, and glyph matrices must
314 be adjusted when this flag becomes non-zero during display. The
315 reason fonts can be loaded so late is that fonts of fontsets are
320 /* Convert vpos and hpos from frame to window and vice versa.
321 This may only be used for terminal frames. */
325 static int window_to_frame_vpos
P_ ((struct window
*, int));
326 static int window_to_frame_hpos
P_ ((struct window
*, int));
327 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
328 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
330 /* One element of the ring buffer containing redisplay history
333 struct redisplay_history
335 char trace
[512 + 100];
338 /* The size of the history buffer. */
340 #define REDISPLAY_HISTORY_SIZE 30
342 /* The redisplay history buffer. */
344 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
346 /* Next free entry in redisplay_history. */
348 static int history_idx
;
350 /* A tick that's incremented each time something is added to the
353 static unsigned history_tick
;
355 static void add_frame_display_history
P_ ((struct frame
*, int));
356 static void add_window_display_history
P_ ((struct window
*, char *, int));
359 /* Add to the redisplay history how window W has been displayed.
360 MSG is a trace containing the information how W's glyph matrix
361 has been contructed. PAUSED_P non-zero means that the update
362 has been interrupted for pending input. */
365 add_window_display_history (w
, msg
, paused_p
)
372 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
374 buf
= redisplay_history
[history_idx
].trace
;
377 sprintf (buf
, "%d: window %p (`%s')%s\n",
380 ((BUFFERP (w
->buffer
)
381 && STRINGP (XBUFFER (w
->buffer
)->name
))
382 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
384 paused_p
? " ***paused***" : "");
389 /* Add to the redisplay history that frame F has been displayed.
390 PAUSED_P non-zero means that the update has been interrupted for
394 add_frame_display_history (f
, paused_p
)
400 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
402 buf
= redisplay_history
[history_idx
].trace
;
405 sprintf (buf
, "%d: update frame %p%s",
407 f
, paused_p
? " ***paused***" : "");
411 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
412 Sdump_redisplay_history
, 0, 0, "",
413 doc
: /* Dump redisplay history to stderr. */)
418 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
421 i
= REDISPLAY_HISTORY_SIZE
- 1;
422 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
429 #else /* GLYPH_DEBUG == 0 */
431 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + XFASTINT ((W)->top))
432 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + XFASTINT ((W)->left))
434 #endif /* GLYPH_DEBUG == 0 */
437 /* Like bcopy except never gets confused by overlap. Let this be the
438 first function defined in this file, or change emacs.c where the
439 address of this function is used. */
442 safe_bcopy (from
, to
, size
)
446 if (size
<= 0 || from
== to
)
449 /* If the source and destination don't overlap, then bcopy can
450 handle it. If they do overlap, but the destination is lower in
451 memory than the source, we'll assume bcopy can handle that. */
452 if (to
< from
|| from
+ size
<= to
)
453 bcopy (from
, to
, size
);
455 /* Otherwise, we'll copy from the end. */
458 register char *endf
= from
+ size
;
459 register char *endt
= to
+ size
;
461 /* If TO - FROM is large, then we should break the copy into
462 nonoverlapping chunks of TO - FROM bytes each. However, if
463 TO - FROM is small, then the bcopy function call overhead
464 makes this not worth it. The crossover point could be about
465 anywhere. Since I don't think the obvious copy loop is too
466 bad, I'm trying to err in its favor. */
471 while (endf
!= from
);
483 bcopy (endf
, endt
, to
- from
);
486 /* If SIZE wasn't a multiple of TO - FROM, there will be a
487 little left over. The amount left over is (endt + (to -
488 from)) - to, which is endt - from. */
489 bcopy (from
, to
, endt
- from
);
496 /***********************************************************************
498 ***********************************************************************/
500 /* Allocate and return a glyph_matrix structure. POOL is the glyph
501 pool from which memory for the matrix should be allocated, or null
502 for window-based redisplay where no glyph pools are used. The
503 member `pool' of the glyph matrix structure returned is set to
504 POOL, the structure is otherwise zeroed. */
506 struct glyph_matrix
*
507 new_glyph_matrix (pool
)
508 struct glyph_pool
*pool
;
510 struct glyph_matrix
*result
;
512 /* Allocate and clear. */
513 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
514 bzero (result
, sizeof *result
);
516 /* Increment number of allocated matrices. This count is used
517 to detect memory leaks. */
518 ++glyph_matrix_count
;
520 /* Set pool and return. */
526 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
528 The global counter glyph_matrix_count is decremented when a matrix
529 is freed. If the count gets negative, more structures were freed
530 than allocated, i.e. one matrix was freed more than once or a bogus
531 pointer was passed to this function.
533 If MATRIX->pool is null, this means that the matrix manages its own
534 glyph memory---this is done for matrices on X frames. Freeing the
535 matrix also frees the glyph memory in this case. */
538 free_glyph_matrix (matrix
)
539 struct glyph_matrix
*matrix
;
545 /* Detect the case that more matrices are freed than were
547 if (--glyph_matrix_count
< 0)
550 /* Free glyph memory if MATRIX owns it. */
551 if (matrix
->pool
== NULL
)
552 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
553 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
555 /* Free row structures and the matrix itself. */
556 xfree (matrix
->rows
);
562 /* Return the number of glyphs to reserve for a marginal area of
563 window W. TOTAL_GLYPHS is the number of glyphs in a complete
564 display line of window W. MARGIN gives the width of the marginal
565 area in canonical character units. MARGIN should be an integer
569 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
576 if (NUMBERP (margin
))
578 int width
= XFASTINT (w
->width
);
579 double d
= max (0, XFLOATINT (margin
));
580 d
= min (width
/ 2 - 1, d
);
581 n
= (int) ((double) total_glyphs
/ width
* d
);
590 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
593 W is null if the function is called for a frame glyph matrix.
594 Otherwise it is the window MATRIX is a member of. X and Y are the
595 indices of the first column and row of MATRIX within the frame
596 matrix, if such a matrix exists. They are zero for purely
597 window-based redisplay. DIM is the needed size of the matrix.
599 In window-based redisplay, where no frame matrices exist, glyph
600 matrices manage their own glyph storage. Otherwise, they allocate
601 storage from a common frame glyph pool which can be found in
604 The reason for this memory management strategy is to avoid complete
605 frame redraws if possible. When we allocate from a common pool, a
606 change of the location or size of a sub-matrix within the pool
607 requires a complete redisplay of the frame because we cannot easily
608 make sure that the current matrices of all windows still agree with
609 what is displayed on the screen. While this is usually fast, it
610 leads to screen flickering. */
613 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
615 struct glyph_matrix
*matrix
;
621 int marginal_areas_changed_p
= 0;
622 int header_line_changed_p
= 0;
623 int header_line_p
= 0;
624 int left
= -1, right
= -1;
625 int window_x
, window_y
, window_width
= -1, window_height
;
627 /* See if W had a top line that has disappeared now, or vice versa. */
630 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
631 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
633 matrix
->header_line_p
= header_line_p
;
635 /* Do nothing if MATRIX' size, position, vscroll, and marginal areas
636 haven't changed. This optimization is important because preserving
637 the matrix means preventing redisplay. */
638 if (matrix
->pool
== NULL
)
640 window_box (w
, -1, &window_x
, &window_y
, &window_width
, &window_height
);
641 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_width
);
642 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_width
);
643 xassert (left
>= 0 && right
>= 0);
644 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
645 || right
!= matrix
->right_margin_glyphs
);
647 if (!marginal_areas_changed_p
649 && !header_line_changed_p
650 && matrix
->window_left_x
== XFASTINT (w
->left
)
651 && matrix
->window_top_y
== XFASTINT (w
->top
)
652 && matrix
->window_height
== window_height
653 && matrix
->window_vscroll
== w
->vscroll
654 && matrix
->window_width
== window_width
)
658 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
659 if (matrix
->rows_allocated
< dim
.height
)
661 int size
= dim
.height
* sizeof (struct glyph_row
);
662 new_rows
= dim
.height
- matrix
->rows_allocated
;
663 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
664 bzero (matrix
->rows
+ matrix
->rows_allocated
,
665 new_rows
* sizeof *matrix
->rows
);
666 matrix
->rows_allocated
= dim
.height
;
671 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
672 on a frame not using window-based redisplay. Set up pointers for
673 each row into the glyph pool. */
676 xassert (matrix
->pool
->glyphs
);
680 left
= margin_glyphs_to_reserve (w
, dim
.width
,
681 w
->left_margin_width
);
682 right
= margin_glyphs_to_reserve (w
, dim
.width
,
683 w
->right_margin_width
);
688 for (i
= 0; i
< dim
.height
; ++i
)
690 struct glyph_row
*row
= &matrix
->rows
[i
];
692 row
->glyphs
[LEFT_MARGIN_AREA
]
693 = (matrix
->pool
->glyphs
694 + (y
+ i
) * matrix
->pool
->ncolumns
698 || row
== matrix
->rows
+ dim
.height
- 1
699 || (row
== matrix
->rows
&& matrix
->header_line_p
))
701 row
->glyphs
[TEXT_AREA
]
702 = row
->glyphs
[LEFT_MARGIN_AREA
];
703 row
->glyphs
[RIGHT_MARGIN_AREA
]
704 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
705 row
->glyphs
[LAST_AREA
]
706 = row
->glyphs
[RIGHT_MARGIN_AREA
];
710 row
->glyphs
[TEXT_AREA
]
711 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
712 row
->glyphs
[RIGHT_MARGIN_AREA
]
713 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
714 row
->glyphs
[LAST_AREA
]
715 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
719 matrix
->left_margin_glyphs
= left
;
720 matrix
->right_margin_glyphs
= right
;
724 /* If MATRIX->pool is null, MATRIX is responsible for managing
725 its own memory. Allocate glyph memory from the heap. */
726 if (dim
.width
> matrix
->matrix_w
728 || header_line_changed_p
729 || marginal_areas_changed_p
)
731 struct glyph_row
*row
= matrix
->rows
;
732 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
736 row
->glyphs
[LEFT_MARGIN_AREA
]
737 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
739 * sizeof (struct glyph
)));
741 /* The mode line never has marginal areas. */
742 if (row
== matrix
->rows
+ dim
.height
- 1
743 || (row
== matrix
->rows
&& matrix
->header_line_p
))
745 row
->glyphs
[TEXT_AREA
]
746 = row
->glyphs
[LEFT_MARGIN_AREA
];
747 row
->glyphs
[RIGHT_MARGIN_AREA
]
748 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
749 row
->glyphs
[LAST_AREA
]
750 = row
->glyphs
[RIGHT_MARGIN_AREA
];
754 row
->glyphs
[TEXT_AREA
]
755 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
756 row
->glyphs
[RIGHT_MARGIN_AREA
]
757 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
758 row
->glyphs
[LAST_AREA
]
759 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
765 xassert (left
>= 0 && right
>= 0);
766 matrix
->left_margin_glyphs
= left
;
767 matrix
->right_margin_glyphs
= right
;
770 /* Number of rows to be used by MATRIX. */
771 matrix
->nrows
= dim
.height
;
772 xassert (matrix
->nrows
>= 0);
776 if (matrix
== w
->current_matrix
)
778 /* Mark rows in a current matrix of a window as not having
779 valid contents. It's important to not do this for
780 desired matrices. When Emacs starts, it may already be
781 building desired matrices when this function runs. */
782 if (window_width
< 0)
783 window_width
= window_box_width (w
, -1);
785 /* Optimize the case that only the height has changed (C-x 2,
786 upper window). Invalidate all rows that are no longer part
788 if (!marginal_areas_changed_p
789 && !header_line_changed_p
791 && dim
.width
== matrix
->matrix_w
792 && matrix
->window_left_x
== XFASTINT (w
->left
)
793 && matrix
->window_top_y
== XFASTINT (w
->top
)
794 && matrix
->window_width
== window_width
)
796 /* Find the last row in the window. */
797 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
798 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
804 /* Window end is invalid, if inside of the rows that
805 are invalidated below. */
806 if (INTEGERP (w
->window_end_vpos
)
807 && XFASTINT (w
->window_end_vpos
) >= i
)
808 w
->window_end_valid
= Qnil
;
810 while (i
< matrix
->nrows
)
811 matrix
->rows
[i
++].enabled_p
= 0;
815 for (i
= 0; i
< matrix
->nrows
; ++i
)
816 matrix
->rows
[i
].enabled_p
= 0;
819 else if (matrix
== w
->desired_matrix
)
821 /* Rows in desired matrices always have to be cleared;
822 redisplay expects this is the case when it runs, so it
823 had better be the case when we adjust matrices between
825 for (i
= 0; i
< matrix
->nrows
; ++i
)
826 matrix
->rows
[i
].enabled_p
= 0;
831 /* Remember last values to be able to optimize frame redraws. */
832 matrix
->matrix_x
= x
;
833 matrix
->matrix_y
= y
;
834 matrix
->matrix_w
= dim
.width
;
835 matrix
->matrix_h
= dim
.height
;
837 /* Record the top y location and height of W at the time the matrix
838 was last adjusted. This is used to optimize redisplay above. */
841 matrix
->window_left_x
= XFASTINT (w
->left
);
842 matrix
->window_top_y
= XFASTINT (w
->top
);
843 matrix
->window_height
= window_height
;
844 matrix
->window_width
= window_width
;
845 matrix
->window_vscroll
= w
->vscroll
;
850 /* Reverse the contents of rows in MATRIX between START and END. The
851 contents of the row at END - 1 end up at START, END - 2 at START +
852 1 etc. This is part of the implementation of rotate_matrix (see
856 reverse_rows (matrix
, start
, end
)
857 struct glyph_matrix
*matrix
;
862 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
864 /* Non-ISO HP/UX compiler doesn't like auto struct
866 struct glyph_row temp
;
867 temp
= matrix
->rows
[i
];
868 matrix
->rows
[i
] = matrix
->rows
[j
];
869 matrix
->rows
[j
] = temp
;
874 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
875 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
876 indices. (Note: this does not copy glyphs, only glyph pointers in
877 row structures are moved around).
879 The algorithm used for rotating the vector was, I believe, first
880 described by Kernighan. See the vector R as consisting of two
881 sub-vectors AB, where A has length BY for BY >= 0. The result
882 after rotating is then BA. Reverse both sub-vectors to get ArBr
883 and reverse the result to get (ArBr)r which is BA. Similar for
887 rotate_matrix (matrix
, first
, last
, by
)
888 struct glyph_matrix
*matrix
;
893 /* Up (rotate left, i.e. towards lower indices). */
895 reverse_rows (matrix
, first
, first
+ by
);
896 reverse_rows (matrix
, first
+ by
, last
);
897 reverse_rows (matrix
, first
, last
);
901 /* Down (rotate right, i.e. towards higher indices). */
902 reverse_rows (matrix
, last
- by
, last
);
903 reverse_rows (matrix
, first
, last
- by
);
904 reverse_rows (matrix
, first
, last
);
909 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
910 with indices START <= index < END. Increment positions by DELTA/
914 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
915 struct glyph_matrix
*matrix
;
916 int start
, end
, delta
, delta_bytes
;
918 /* Check that START and END are reasonable values. */
919 xassert (start
>= 0 && start
<= matrix
->nrows
);
920 xassert (end
>= 0 && end
<= matrix
->nrows
);
921 xassert (start
<= end
);
923 for (; start
< end
; ++start
)
924 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
928 /* Enable a range of rows in glyph matrix MATRIX. START and END are
929 the row indices of the first and last + 1 row to enable. If
930 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
933 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
934 struct glyph_matrix
*matrix
;
938 xassert (start
<= end
);
939 xassert (start
>= 0 && start
< matrix
->nrows
);
940 xassert (end
>= 0 && end
<= matrix
->nrows
);
942 for (; start
< end
; ++start
)
943 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
949 This empties all rows in MATRIX by setting the enabled_p flag for
950 all rows of the matrix to zero. The function prepare_desired_row
951 will eventually really clear a row when it sees one with a zero
954 Resets update hints to defaults value. The only update hint
955 currently present is the flag MATRIX->no_scrolling_p. */
958 clear_glyph_matrix (matrix
)
959 struct glyph_matrix
*matrix
;
963 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
964 matrix
->no_scrolling_p
= 0;
969 /* Shift part of the glyph matrix MATRIX of window W up or down.
970 Increment y-positions in glyph rows between START and END by DY,
971 and recompute their visible height. */
974 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
976 struct glyph_matrix
*matrix
;
981 xassert (start
<= end
);
982 xassert (start
>= 0 && start
< matrix
->nrows
);
983 xassert (end
>= 0 && end
<= matrix
->nrows
);
985 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
986 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
988 for (; start
< end
; ++start
)
990 struct glyph_row
*row
= &matrix
->rows
[start
];
993 row
->visible_height
= row
->height
;
996 row
->visible_height
-= min_y
- row
->y
;
997 if (row
->y
+ row
->height
> max_y
)
998 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
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
));
1152 row
->visible_height
= row
->height
;
1155 row
->visible_height
-= min_y
- row
->y
;
1156 if (row
->y
+ row
->height
> max_y
)
1157 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1163 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1164 are the amounts by which to change positions. Note that the first
1165 glyph of the text area of a row can have a buffer position even if
1166 the used count of the text area is zero. Such rows display line
1170 increment_row_positions (row
, delta
, delta_bytes
)
1171 struct glyph_row
*row
;
1172 int delta
, delta_bytes
;
1176 /* Increment start and end positions. */
1177 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1178 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1179 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1180 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1182 /* Increment positions in glyphs. */
1183 for (area
= 0; area
< LAST_AREA
; ++area
)
1184 for (i
= 0; i
< row
->used
[area
]; ++i
)
1185 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1186 && row
->glyphs
[area
][i
].charpos
> 0)
1187 row
->glyphs
[area
][i
].charpos
+= delta
;
1189 /* Capture the case of rows displaying a line end. */
1190 if (row
->used
[TEXT_AREA
] == 0
1191 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1192 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1197 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1198 contents, i.e. glyph structure contents are exchanged between A and
1199 B without changing glyph pointers in A and B. */
1202 swap_glyphs_in_rows (a
, b
)
1203 struct glyph_row
*a
, *b
;
1207 for (area
= 0; area
< LAST_AREA
; ++area
)
1209 /* Number of glyphs to swap. */
1210 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1212 /* Start of glyphs in area of row A. */
1213 struct glyph
*glyph_a
= a
->glyphs
[area
];
1215 /* End + 1 of glyphs in area of row A. */
1216 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1218 /* Start of glyphs in area of row B. */
1219 struct glyph
*glyph_b
= b
->glyphs
[area
];
1221 while (glyph_a
< glyph_a_end
)
1223 /* Non-ISO HP/UX compiler doesn't like auto struct
1227 *glyph_a
= *glyph_b
;
1237 /* Exchange pointers to glyph memory between glyph rows A and B. */
1240 swap_glyph_pointers (a
, b
)
1241 struct glyph_row
*a
, *b
;
1244 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1246 struct glyph
*temp
= a
->glyphs
[i
];
1247 a
->glyphs
[i
] = b
->glyphs
[i
];
1248 b
->glyphs
[i
] = temp
;
1253 /* Copy glyph row structure FROM to glyph row structure TO, except
1254 that glyph pointers in the structures are left unchanged. */
1257 copy_row_except_pointers (to
, from
)
1258 struct glyph_row
*to
, *from
;
1260 struct glyph
*pointers
[1 + LAST_AREA
];
1262 /* Save glyph pointers of TO. */
1263 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1265 /* Do a structure assignment. */
1268 /* Restore original pointers of TO. */
1269 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1273 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1274 TO and FROM are left unchanged. Glyph contents are copied from the
1275 glyph memory of FROM to the glyph memory of TO. Increment buffer
1276 positions in row TO by DELTA/ DELTA_BYTES. */
1279 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1280 struct glyph_row
*to
, *from
;
1281 int delta
, delta_bytes
;
1285 /* This is like a structure assignment TO = FROM, except that
1286 glyph pointers in the rows are left unchanged. */
1287 copy_row_except_pointers (to
, from
);
1289 /* Copy glyphs from FROM to TO. */
1290 for (area
= 0; area
< LAST_AREA
; ++area
)
1291 if (from
->used
[area
])
1292 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1293 from
->used
[area
] * sizeof (struct glyph
));
1295 /* Increment buffer positions in TO by DELTA. */
1296 increment_row_positions (to
, delta
, delta_bytes
);
1300 /* Assign glyph row FROM to glyph row TO. This works like a structure
1301 assignment TO = FROM, except that glyph pointers are not copied but
1302 exchanged between TO and FROM. Pointers must be exchanged to avoid
1306 assign_row (to
, from
)
1307 struct glyph_row
*to
, *from
;
1309 swap_glyph_pointers (to
, from
);
1310 copy_row_except_pointers (to
, from
);
1314 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1315 a row in a window matrix, is a slice of the glyph memory of the
1316 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1317 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1318 memory of FRAME_ROW. */
1323 glyph_row_slice_p (window_row
, frame_row
)
1324 struct glyph_row
*window_row
, *frame_row
;
1326 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1327 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1328 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1330 return (frame_glyph_start
<= window_glyph_start
1331 && window_glyph_start
< frame_glyph_end
);
1334 #endif /* GLYPH_DEBUG */
1338 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1339 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1340 in WINDOW_MATRIX is found satisfying the condition. */
1342 static struct glyph_row
*
1343 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1344 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1349 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1351 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1352 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1353 frame_matrix
->rows
+ row
))
1356 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1361 /* Prepare ROW for display. Desired rows are cleared lazily,
1362 i.e. they are only marked as to be cleared by setting their
1363 enabled_p flag to zero. When a row is to be displayed, a prior
1364 call to this function really clears it. */
1367 prepare_desired_row (row
)
1368 struct glyph_row
*row
;
1370 if (!row
->enabled_p
)
1372 clear_glyph_row (row
);
1378 /* Return a hash code for glyph row ROW. */
1381 line_hash_code (row
)
1382 struct glyph_row
*row
;
1388 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1389 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1393 int c
= glyph
->u
.ch
;
1394 int face_id
= glyph
->face_id
;
1395 if (must_write_spaces
)
1397 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1398 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1410 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1411 the number of characters in the line. If must_write_spaces is
1412 zero, leading and trailing spaces are ignored. */
1415 line_draw_cost (matrix
, vpos
)
1416 struct glyph_matrix
*matrix
;
1419 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1420 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1421 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1423 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1424 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1426 /* Ignore trailing and leading spaces if we can. */
1427 if (!must_write_spaces
)
1429 /* Skip from the end over trailing spaces. */
1430 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1433 /* All blank line. */
1437 /* Skip over leading spaces. */
1438 while (CHAR_GLYPH_SPACE_P (*beg
))
1442 /* If we don't have a glyph-table, each glyph is one character,
1443 so return the number of glyphs. */
1444 if (glyph_table_base
== 0)
1448 /* Otherwise, scan the glyphs and accumulate their total length
1453 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1456 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1459 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1469 /* Test two glyph rows A and B for equality. Value is non-zero if A
1470 and B have equal contents. W is the window to which the glyphs
1471 rows A and B belong. It is needed here to test for partial row
1472 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1473 flags of A and B, too. */
1476 row_equal_p (w
, a
, b
, mouse_face_p
)
1478 struct glyph_row
*a
, *b
;
1483 else if (a
->hash
!= b
->hash
)
1487 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1490 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1493 /* Compare glyphs. */
1494 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1496 if (a
->used
[area
] != b
->used
[area
])
1499 a_glyph
= a
->glyphs
[area
];
1500 a_end
= a_glyph
+ a
->used
[area
];
1501 b_glyph
= b
->glyphs
[area
];
1503 while (a_glyph
< a_end
1504 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1505 ++a_glyph
, ++b_glyph
;
1507 if (a_glyph
!= a_end
)
1511 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1512 || a
->fill_line_p
!= b
->fill_line_p
1513 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1514 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1515 || a
->continued_p
!= b
->continued_p
1516 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1517 || a
->overlapped_p
!= b
->overlapped_p
1518 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1519 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1520 /* Different partially visible characters on left margin. */
1522 /* Different height. */
1523 || a
->ascent
!= b
->ascent
1524 || a
->phys_ascent
!= b
->phys_ascent
1525 || a
->phys_height
!= b
->phys_height
1526 || a
->visible_height
!= b
->visible_height
)
1535 /***********************************************************************
1538 See dispextern.h for an overall explanation of glyph pools.
1539 ***********************************************************************/
1541 /* Allocate a glyph_pool structure. The structure returned is
1542 initialized with zeros. The global variable glyph_pool_count is
1543 incremented for each pool allocated. */
1545 static struct glyph_pool
*
1548 struct glyph_pool
*result
;
1550 /* Allocate a new glyph_pool and clear it. */
1551 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1552 bzero (result
, sizeof *result
);
1554 /* For memory leak and double deletion checking. */
1561 /* Free a glyph_pool structure POOL. The function may be called with
1562 a null POOL pointer. The global variable glyph_pool_count is
1563 decremented with every pool structure freed. If this count gets
1564 negative, more structures were freed than allocated, i.e. one
1565 structure must have been freed more than once or a bogus pointer
1566 was passed to free_glyph_pool. */
1569 free_glyph_pool (pool
)
1570 struct glyph_pool
*pool
;
1574 /* More freed than allocated? */
1576 xassert (glyph_pool_count
>= 0);
1578 xfree (pool
->glyphs
);
1584 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1585 columns we need. This function never shrinks a pool. The only
1586 case in which this would make sense, would be when a frame's size
1587 is changed from a large value to a smaller one. But, if someone
1588 does it once, we can expect that he will do it again.
1590 Value is non-zero if the pool changed in a way which makes
1591 re-adjusting window glyph matrices necessary. */
1594 realloc_glyph_pool (pool
, matrix_dim
)
1595 struct glyph_pool
*pool
;
1596 struct dim matrix_dim
;
1601 changed_p
= (pool
->glyphs
== 0
1602 || matrix_dim
.height
!= pool
->nrows
1603 || matrix_dim
.width
!= pool
->ncolumns
);
1605 /* Enlarge the glyph pool. */
1606 needed
= matrix_dim
.width
* matrix_dim
.height
;
1607 if (needed
> pool
->nglyphs
)
1609 int size
= needed
* sizeof (struct glyph
);
1612 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1615 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1616 bzero (pool
->glyphs
, size
);
1619 pool
->nglyphs
= needed
;
1622 /* Remember the number of rows and columns because (a) we use then
1623 to do sanity checks, and (b) the number of columns determines
1624 where rows in the frame matrix start---this must be available to
1625 determine pointers to rows of window sub-matrices. */
1626 pool
->nrows
= matrix_dim
.height
;
1627 pool
->ncolumns
= matrix_dim
.width
;
1634 /***********************************************************************
1636 ***********************************************************************/
1641 /* Flush standard output. This is sometimes useful to call from
1651 /* Check that no glyph pointers have been lost in MATRIX. If a
1652 pointer has been lost, e.g. by using a structure assignment between
1653 rows, at least one pointer must occur more than once in the rows of
1657 check_matrix_pointer_lossage (matrix
)
1658 struct glyph_matrix
*matrix
;
1662 for (i
= 0; i
< matrix
->nrows
; ++i
)
1663 for (j
= 0; j
< matrix
->nrows
; ++j
)
1665 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1666 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1670 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1673 matrix_row (matrix
, row
)
1674 struct glyph_matrix
*matrix
;
1677 xassert (matrix
&& matrix
->rows
);
1678 xassert (row
>= 0 && row
< matrix
->nrows
);
1680 /* That's really too slow for normal testing because this function
1681 is called almost everywhere. Although---it's still astonishingly
1682 fast, so it is valuable to have for debugging purposes. */
1684 check_matrix_pointer_lossage (matrix
);
1687 return matrix
->rows
+ row
;
1691 #if 0 /* This function makes invalid assumptions when text is
1692 partially invisible. But it might come handy for debugging
1695 /* Check invariants that must hold for an up to date current matrix of
1699 check_matrix_invariants (w
)
1702 struct glyph_matrix
*matrix
= w
->current_matrix
;
1703 int yb
= window_text_bottom_y (w
);
1704 struct glyph_row
*row
= matrix
->rows
;
1705 struct glyph_row
*last_text_row
= NULL
;
1706 struct buffer
*saved
= current_buffer
;
1707 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1710 /* This can sometimes happen for a fresh window. */
1711 if (matrix
->nrows
< 2)
1714 set_buffer_temp (buffer
);
1716 /* Note: last row is always reserved for the mode line. */
1717 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1718 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1720 struct glyph_row
*next
= row
+ 1;
1722 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1723 last_text_row
= row
;
1725 /* Check that character and byte positions are in sync. */
1726 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1727 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1729 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1730 have such a position temporarily in case of a minibuffer
1731 displaying something like `[Sole completion]' at its end. */
1732 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1733 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1734 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1736 /* Check that end position of `row' is equal to start position
1738 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1740 xassert (MATRIX_ROW_END_CHARPOS (row
)
1741 == MATRIX_ROW_START_CHARPOS (next
));
1742 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1743 == MATRIX_ROW_START_BYTEPOS (next
));
1748 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1749 xassert (w
->desired_matrix
->rows
!= NULL
);
1750 set_buffer_temp (saved
);
1755 #endif /* GLYPH_DEBUG != 0 */
1759 /**********************************************************************
1760 Allocating/ Adjusting Glyph Matrices
1761 **********************************************************************/
1763 /* Allocate glyph matrices over a window tree for a frame-based
1766 X and Y are column/row within the frame glyph matrix where
1767 sub-matrices for the window tree rooted at WINDOW must be
1768 allocated. CH_DIM contains the dimensions of the smallest
1769 character that could be used during display. DIM_ONLY_P non-zero
1770 means that the caller of this function is only interested in the
1771 result matrix dimension, and matrix adjustments should not be
1774 The function returns the total width/height of the sub-matrices of
1775 the window tree. If called on a frame root window, the computation
1776 will take the mini-buffer window into account.
1778 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1780 NEW_LEAF_MATRIX set if any window in the tree did not have a
1781 glyph matrices yet, and
1783 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1784 any window in the tree will be changed or have been changed (see
1787 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1790 Windows are arranged into chains of windows on the same level
1791 through the next fields of window structures. Such a level can be
1792 either a sequence of horizontally adjacent windows from left to
1793 right, or a sequence of vertically adjacent windows from top to
1794 bottom. Each window in a horizontal sequence can be either a leaf
1795 window or a vertical sequence; a window in a vertical sequence can
1796 be either a leaf or a horizontal sequence. All windows in a
1797 horizontal sequence have the same height, and all windows in a
1798 vertical sequence have the same width.
1800 This function uses, for historical reasons, a more general
1801 algorithm to determine glyph matrix dimensions that would be
1804 The matrix height of a horizontal sequence is determined by the
1805 maximum height of any matrix in the sequence. The matrix width of
1806 a horizontal sequence is computed by adding up matrix widths of
1807 windows in the sequence.
1809 |<------- result width ------->|
1810 +---------+----------+---------+ ---
1813 +---------+ | | result height
1818 The matrix width of a vertical sequence is the maximum matrix width
1819 of any window in the sequence. Its height is computed by adding up
1820 matrix heights of windows in the sequence.
1822 |<---- result width -->|
1830 +------------+---------+ |
1833 +------------+---------+ --- */
1835 /* Bit indicating that a new matrix will be allocated or has been
1838 #define NEW_LEAF_MATRIX (1 << 0)
1840 /* Bit indicating that a matrix will or has changed its location or
1843 #define CHANGED_LEAF_MATRIX (1 << 1)
1846 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1847 window_change_flags
)
1851 int *window_change_flags
;
1853 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1855 int wmax
= 0, hmax
= 0;
1859 int in_horz_combination_p
;
1861 /* What combination is WINDOW part of? Compute this once since the
1862 result is the same for all windows in the `next' chain. The
1863 special case of a root window (parent equal to nil) is treated
1864 like a vertical combination because a root window's `next'
1865 points to the mini-buffer window, if any, which is arranged
1866 vertically below other windows. */
1867 in_horz_combination_p
1868 = (!NILP (XWINDOW (window
)->parent
)
1869 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1871 /* For WINDOW and all windows on the same level. */
1874 w
= XWINDOW (window
);
1876 /* Get the dimension of the window sub-matrix for W, depending
1877 on whether this a combination or a leaf window. */
1878 if (!NILP (w
->hchild
))
1879 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1881 window_change_flags
);
1882 else if (!NILP (w
->vchild
))
1883 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1885 window_change_flags
);
1888 /* If not already done, allocate sub-matrix structures. */
1889 if (w
->desired_matrix
== NULL
)
1891 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1892 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1893 *window_change_flags
|= NEW_LEAF_MATRIX
;
1896 /* Width and height MUST be chosen so that there are no
1897 holes in the frame matrix. */
1898 dim
.width
= required_matrix_width (w
);
1899 dim
.height
= required_matrix_height (w
);
1901 /* Will matrix be re-allocated? */
1902 if (x
!= w
->desired_matrix
->matrix_x
1903 || y
!= w
->desired_matrix
->matrix_y
1904 || dim
.width
!= w
->desired_matrix
->matrix_w
1905 || dim
.height
!= w
->desired_matrix
->matrix_h
1906 || (margin_glyphs_to_reserve (w
, dim
.width
,
1907 w
->right_margin_width
)
1908 != w
->desired_matrix
->left_margin_glyphs
)
1909 || (margin_glyphs_to_reserve (w
, dim
.width
,
1910 w
->left_margin_width
)
1911 != w
->desired_matrix
->right_margin_glyphs
))
1912 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1914 /* Actually change matrices, if allowed. Do not consider
1915 CHANGED_LEAF_MATRIX computed above here because the pool
1916 may have been changed which we don't now here. We trust
1917 that we only will be called with DIM_ONLY_P != 0 when
1921 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1922 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1926 /* If we are part of a horizontal combination, advance x for
1927 windows to the right of W; otherwise advance y for windows
1929 if (in_horz_combination_p
)
1934 /* Remember maximum glyph matrix dimensions. */
1935 wmax
= max (wmax
, dim
.width
);
1936 hmax
= max (hmax
, dim
.height
);
1938 /* Next window on same level. */
1941 while (!NILP (window
));
1943 /* Set `total' to the total glyph matrix dimension of this window
1944 level. In a vertical combination, the width is the width of the
1945 widest window; the height is the y we finally reached, corrected
1946 by the y we started with. In a horizontal combination, the total
1947 height is the height of the tallest window, and the width is the
1948 x we finally reached, corrected by the x we started with. */
1949 if (in_horz_combination_p
)
1951 total
.width
= x
- x0
;
1952 total
.height
= hmax
;
1957 total
.height
= y
- y0
;
1964 /* Return the required height of glyph matrices for window W. */
1967 required_matrix_height (w
)
1970 #ifdef HAVE_WINDOW_SYSTEM
1971 struct frame
*f
= XFRAME (w
->frame
);
1973 if (FRAME_WINDOW_P (f
))
1975 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1976 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1977 return (((window_pixel_height
+ ch_height
- 1)
1979 /* One partially visible line at the top and
1980 bottom of the window. */
1982 /* 2 for top and mode line. */
1985 #endif /* HAVE_WINDOW_SYSTEM */
1987 return XINT (w
->height
);
1991 /* Return the required width of glyph matrices for window W. */
1994 required_matrix_width (w
)
1997 #ifdef HAVE_WINDOW_SYSTEM
1998 struct frame
*f
= XFRAME (w
->frame
);
1999 if (FRAME_WINDOW_P (f
))
2001 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2002 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
2004 /* Compute number of glyphs needed in a glyph row. */
2005 return (((window_pixel_width
+ ch_width
- 1)
2007 /* 2 partially visible columns in the text area. */
2009 /* One partially visible column at the right
2010 edge of each marginal area. */
2013 #endif /* HAVE_WINDOW_SYSTEM */
2015 return XINT (w
->width
);
2019 /* Allocate window matrices for window-based redisplay. W is the
2020 window whose matrices must be allocated/reallocated. CH_DIM is the
2021 size of the smallest character that could potentially be used on W. */
2024 allocate_matrices_for_window_redisplay (w
)
2029 if (!NILP (w
->vchild
))
2030 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2031 else if (!NILP (w
->hchild
))
2032 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2035 /* W is a leaf window. */
2038 /* If matrices are not yet allocated, allocate them now. */
2039 if (w
->desired_matrix
== NULL
)
2041 w
->desired_matrix
= new_glyph_matrix (NULL
);
2042 w
->current_matrix
= new_glyph_matrix (NULL
);
2045 dim
.width
= required_matrix_width (w
);
2046 dim
.height
= required_matrix_height (w
);
2047 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2048 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2051 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2056 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2057 do it for all frames; otherwise do it just for the given frame.
2058 This function must be called when a new frame is created, its size
2059 changes, or its window configuration changes. */
2065 /* Block input so that expose events and other events that access
2066 glyph matrices are not processed while we are changing them. */
2070 adjust_frame_glyphs (f
);
2073 Lisp_Object tail
, lisp_frame
;
2075 FOR_EACH_FRAME (tail
, lisp_frame
)
2076 adjust_frame_glyphs (XFRAME (lisp_frame
));
2083 /* Adjust frame glyphs when Emacs is initialized.
2085 To be called from init_display.
2087 We need a glyph matrix because redraw will happen soon.
2088 Unfortunately, window sizes on selected_frame are not yet set to
2089 meaningful values. I believe we can assume that there are only two
2090 windows on the frame---the mini-buffer and the root window. Frame
2091 height and width seem to be correct so far. So, set the sizes of
2092 windows to estimated values. */
2095 adjust_frame_glyphs_initially ()
2097 struct frame
*sf
= SELECTED_FRAME ();
2098 struct window
*root
= XWINDOW (sf
->root_window
);
2099 struct window
*mini
= XWINDOW (root
->next
);
2100 int frame_height
= FRAME_HEIGHT (sf
);
2101 int frame_width
= FRAME_WIDTH (sf
);
2102 int top_margin
= FRAME_TOP_MARGIN (sf
);
2104 /* Do it for the root window. */
2105 XSETFASTINT (root
->top
, top_margin
);
2106 XSETFASTINT (root
->width
, frame_width
);
2107 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2109 /* Do it for the mini-buffer window. */
2110 XSETFASTINT (mini
->top
, frame_height
- 1);
2111 XSETFASTINT (mini
->width
, frame_width
);
2112 set_window_height (root
->next
, 1, 0);
2114 adjust_frame_glyphs (sf
);
2115 glyphs_initialized_initially_p
= 1;
2119 /* Allocate/reallocate glyph matrices of a single frame F. */
2122 adjust_frame_glyphs (f
)
2125 if (FRAME_WINDOW_P (f
))
2126 adjust_frame_glyphs_for_window_redisplay (f
);
2128 adjust_frame_glyphs_for_frame_redisplay (f
);
2130 /* Don't forget the message buffer and the buffer for
2131 decode_mode_spec. */
2132 adjust_frame_message_buffer (f
);
2133 adjust_decode_mode_spec_buffer (f
);
2135 f
->glyphs_initialized_p
= 1;
2139 /* In the window tree with root W, build current matrices of leaf
2140 windows from the frame's current matrix. */
2143 fake_current_matrices (window
)
2148 for (; !NILP (window
); window
= w
->next
)
2150 w
= XWINDOW (window
);
2152 if (!NILP (w
->hchild
))
2153 fake_current_matrices (w
->hchild
);
2154 else if (!NILP (w
->vchild
))
2155 fake_current_matrices (w
->vchild
);
2159 struct frame
*f
= XFRAME (w
->frame
);
2160 struct glyph_matrix
*m
= w
->current_matrix
;
2161 struct glyph_matrix
*fm
= f
->current_matrix
;
2163 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2164 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2166 for (i
= 0; i
< m
->matrix_h
; ++i
)
2168 struct glyph_row
*r
= m
->rows
+ i
;
2169 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2171 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2172 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2174 r
->enabled_p
= fr
->enabled_p
;
2177 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2178 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2179 r
->used
[TEXT_AREA
] = (m
->matrix_w
2180 - r
->used
[LEFT_MARGIN_AREA
]
2181 - r
->used
[RIGHT_MARGIN_AREA
]);
2190 /* Save away the contents of frame F's current frame matrix. Value is
2191 a glyph matrix holding the contents of F's current frame matrix. '*/
2193 static struct glyph_matrix
*
2194 save_current_matrix (f
)
2198 struct glyph_matrix
*saved
;
2200 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2201 bzero (saved
, sizeof *saved
);
2202 saved
->nrows
= f
->current_matrix
->nrows
;
2203 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2204 * sizeof *saved
->rows
);
2205 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2207 for (i
= 0; i
< saved
->nrows
; ++i
)
2209 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2210 struct glyph_row
*to
= saved
->rows
+ i
;
2211 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2212 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2213 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2214 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2221 /* Restore the contents of frame F's current frame matrix from SAVED,
2222 and free memory associated with SAVED. */
2225 restore_current_matrix (f
, saved
)
2227 struct glyph_matrix
*saved
;
2231 for (i
= 0; i
< saved
->nrows
; ++i
)
2233 struct glyph_row
*from
= saved
->rows
+ i
;
2234 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2235 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2236 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2237 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2238 xfree (from
->glyphs
[TEXT_AREA
]);
2241 xfree (saved
->rows
);
2247 /* Allocate/reallocate glyph matrices of a single frame F for
2248 frame-based redisplay. */
2251 adjust_frame_glyphs_for_frame_redisplay (f
)
2255 struct dim matrix_dim
;
2257 int window_change_flags
;
2260 if (!FRAME_LIVE_P (f
))
2263 /* Determine the smallest character in any font for F. On
2264 console windows, all characters have dimension (1, 1). */
2265 ch_dim
.width
= ch_dim
.height
= 1;
2267 top_window_y
= FRAME_TOP_MARGIN (f
);
2269 /* Allocate glyph pool structures if not already done. */
2270 if (f
->desired_pool
== NULL
)
2272 f
->desired_pool
= new_glyph_pool ();
2273 f
->current_pool
= new_glyph_pool ();
2276 /* Allocate frames matrix structures if needed. */
2277 if (f
->desired_matrix
== NULL
)
2279 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2280 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2283 /* Compute window glyph matrices. (This takes the mini-buffer
2284 window into account). The result is the size of the frame glyph
2285 matrix needed. The variable window_change_flags is set to a bit
2286 mask indicating whether new matrices will be allocated or
2287 existing matrices change their size or location within the frame
2289 window_change_flags
= 0;
2291 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2294 &window_change_flags
);
2296 /* Add in menu bar lines, if any. */
2297 matrix_dim
.height
+= top_window_y
;
2299 /* Enlarge pools as necessary. */
2300 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2301 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2303 /* Set up glyph pointers within window matrices. Do this only if
2304 absolutely necessary since it requires a frame redraw. */
2305 if (pool_changed_p
|| window_change_flags
)
2307 /* Do it for window matrices. */
2308 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2310 &window_change_flags
);
2312 /* Size of frame matrices must equal size of frame. Note
2313 that we are called for X frames with window widths NOT equal
2314 to the frame width (from CHANGE_FRAME_SIZE_1). */
2315 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2316 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2318 /* Pointers to glyph memory in glyph rows are exchanged during
2319 the update phase of redisplay, which means in general that a
2320 frame's current matrix consists of pointers into both the
2321 desired and current glyph pool of the frame. Adjusting a
2322 matrix sets the frame matrix up so that pointers are all into
2323 the same pool. If we want to preserve glyph contents of the
2324 current matrix over a call to adjust_glyph_matrix, we must
2325 make a copy of the current glyphs, and restore the current
2326 matrix' contents from that copy. */
2327 if (display_completed
2328 && !FRAME_GARBAGED_P (f
)
2329 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2330 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2332 struct glyph_matrix
*copy
= save_current_matrix (f
);
2333 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2334 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2335 restore_current_matrix (f
, copy
);
2336 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2340 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2341 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2342 SET_FRAME_GARBAGED (f
);
2348 /* Allocate/reallocate glyph matrices of a single frame F for
2349 window-based redisplay. */
2352 adjust_frame_glyphs_for_window_redisplay (f
)
2358 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2360 /* Get minimum sizes. */
2361 #ifdef HAVE_WINDOW_SYSTEM
2362 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2363 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2365 ch_dim
.width
= ch_dim
.height
= 1;
2368 /* Allocate/reallocate window matrices. */
2369 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2371 /* Allocate/ reallocate matrices of the dummy window used to display
2372 the menu bar under X when no X toolkit support is available. */
2373 #ifndef USE_X_TOOLKIT
2375 /* Allocate a dummy window if not already done. */
2376 if (NILP (f
->menu_bar_window
))
2378 f
->menu_bar_window
= make_window ();
2379 w
= XWINDOW (f
->menu_bar_window
);
2380 XSETFRAME (w
->frame
, f
);
2381 w
->pseudo_window_p
= 1;
2384 w
= XWINDOW (f
->menu_bar_window
);
2386 /* Set window dimensions to frame dimensions and allocate or
2387 adjust glyph matrices of W. */
2388 XSETFASTINT (w
->top
, 0);
2389 XSETFASTINT (w
->left
, 0);
2390 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2391 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2392 allocate_matrices_for_window_redisplay (w
);
2394 #endif /* not USE_X_TOOLKIT */
2396 /* Allocate/ reallocate matrices of the tool bar window. If we
2397 don't have a tool bar window yet, make one. */
2398 if (NILP (f
->tool_bar_window
))
2400 f
->tool_bar_window
= make_window ();
2401 w
= XWINDOW (f
->tool_bar_window
);
2402 XSETFRAME (w
->frame
, f
);
2403 w
->pseudo_window_p
= 1;
2406 w
= XWINDOW (f
->tool_bar_window
);
2408 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2409 XSETFASTINT (w
->left
, 0);
2410 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2411 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2412 allocate_matrices_for_window_redisplay (w
);
2416 /* Adjust/ allocate message buffer of frame F.
2418 Note that the message buffer is never freed. Since I could not
2419 find a free in 19.34, I assume that freeing it would be
2420 problematic in some way and don't do it either.
2422 (Implementation note: It should be checked if we can free it
2423 eventually without causing trouble). */
2426 adjust_frame_message_buffer (f
)
2429 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2431 if (FRAME_MESSAGE_BUF (f
))
2433 char *buffer
= FRAME_MESSAGE_BUF (f
);
2434 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2435 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2438 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2442 /* Re-allocate buffer for decode_mode_spec on frame F. */
2445 adjust_decode_mode_spec_buffer (f
)
2448 f
->decode_mode_spec_buffer
2449 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2450 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2455 /**********************************************************************
2456 Freeing Glyph Matrices
2457 **********************************************************************/
2459 /* Free glyph memory for a frame F. F may be null. This function can
2460 be called for the same frame more than once. The root window of
2461 F may be nil when this function is called. This is the case when
2462 the function is called when F is destroyed. */
2468 if (f
&& f
->glyphs_initialized_p
)
2470 /* Block interrupt input so that we don't get surprised by an X
2471 event while we're in an inconsistent state. */
2473 f
->glyphs_initialized_p
= 0;
2475 /* Release window sub-matrices. */
2476 if (!NILP (f
->root_window
))
2477 free_window_matrices (XWINDOW (f
->root_window
));
2479 /* Free the dummy window for menu bars without X toolkit and its
2481 if (!NILP (f
->menu_bar_window
))
2483 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2484 free_glyph_matrix (w
->desired_matrix
);
2485 free_glyph_matrix (w
->current_matrix
);
2486 w
->desired_matrix
= w
->current_matrix
= NULL
;
2487 f
->menu_bar_window
= Qnil
;
2490 /* Free the tool bar window and its glyph matrices. */
2491 if (!NILP (f
->tool_bar_window
))
2493 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2494 free_glyph_matrix (w
->desired_matrix
);
2495 free_glyph_matrix (w
->current_matrix
);
2496 w
->desired_matrix
= w
->current_matrix
= NULL
;
2497 f
->tool_bar_window
= Qnil
;
2500 /* Release frame glyph matrices. Reset fields to zero in
2501 case we are called a second time. */
2502 if (f
->desired_matrix
)
2504 free_glyph_matrix (f
->desired_matrix
);
2505 free_glyph_matrix (f
->current_matrix
);
2506 f
->desired_matrix
= f
->current_matrix
= NULL
;
2509 /* Release glyph pools. */
2510 if (f
->desired_pool
)
2512 free_glyph_pool (f
->desired_pool
);
2513 free_glyph_pool (f
->current_pool
);
2514 f
->desired_pool
= f
->current_pool
= NULL
;
2522 /* Free glyph sub-matrices in the window tree rooted at W. This
2523 function may be called with a null pointer, and it may be called on
2524 the same tree more than once. */
2527 free_window_matrices (w
)
2532 if (!NILP (w
->hchild
))
2533 free_window_matrices (XWINDOW (w
->hchild
));
2534 else if (!NILP (w
->vchild
))
2535 free_window_matrices (XWINDOW (w
->vchild
));
2538 /* This is a leaf window. Free its memory and reset fields
2539 to zero in case this function is called a second time for
2541 free_glyph_matrix (w
->current_matrix
);
2542 free_glyph_matrix (w
->desired_matrix
);
2543 w
->current_matrix
= w
->desired_matrix
= NULL
;
2546 /* Next window on same level. */
2547 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2552 /* Check glyph memory leaks. This function is called from
2553 shut_down_emacs. Note that frames are not destroyed when Emacs
2554 exits. We therefore free all glyph memory for all active frames
2555 explicitly and check that nothing is left allocated. */
2558 check_glyph_memory ()
2560 Lisp_Object tail
, frame
;
2562 /* Free glyph memory for all frames. */
2563 FOR_EACH_FRAME (tail
, frame
)
2564 free_glyphs (XFRAME (frame
));
2566 /* Check that nothing is left allocated. */
2567 if (glyph_matrix_count
)
2569 if (glyph_pool_count
)
2575 /**********************************************************************
2576 Building a Frame Matrix
2577 **********************************************************************/
2579 /* Most of the redisplay code works on glyph matrices attached to
2580 windows. This is a good solution most of the time, but it is not
2581 suitable for terminal code. Terminal output functions cannot rely
2582 on being able to set an arbitrary terminal window. Instead they
2583 must be provided with a view of the whole frame, i.e. the whole
2584 screen. We build such a view by constructing a frame matrix from
2585 window matrices in this section.
2587 Windows that must be updated have their must_be_update_p flag set.
2588 For all such windows, their desired matrix is made part of the
2589 desired frame matrix. For other windows, their current matrix is
2590 made part of the desired frame matrix.
2592 +-----------------+----------------+
2593 | desired | desired |
2595 +-----------------+----------------+
2598 +----------------------------------+
2600 Desired window matrices can be made part of the frame matrix in a
2601 cheap way: We exploit the fact that the desired frame matrix and
2602 desired window matrices share their glyph memory. This is not
2603 possible for current window matrices. Their glyphs are copied to
2604 the desired frame matrix. The latter is equivalent to
2605 preserve_other_columns in the old redisplay.
2607 Used glyphs counters for frame matrix rows are the result of adding
2608 up glyph lengths of the window matrices. A line in the frame
2609 matrix is enabled, if a corresponding line in a window matrix is
2612 After building the desired frame matrix, it will be passed to
2613 terminal code, which will manipulate both the desired and current
2614 frame matrix. Changes applied to the frame's current matrix have
2615 to be visible in current window matrices afterwards, of course.
2617 This problem is solved like this:
2619 1. Window and frame matrices share glyphs. Window matrices are
2620 constructed in a way that their glyph contents ARE the glyph
2621 contents needed in a frame matrix. Thus, any modification of
2622 glyphs done in terminal code will be reflected in window matrices
2625 2. Exchanges of rows in a frame matrix done by terminal code are
2626 intercepted by hook functions so that corresponding row operations
2627 on window matrices can be performed. This is necessary because we
2628 use pointers to glyphs in glyph row structures. To satisfy the
2629 assumption of point 1 above that glyphs are updated implicitly in
2630 window matrices when they are manipulated via the frame matrix,
2631 window and frame matrix must of course agree where to find the
2632 glyphs for their rows. Possible manipulations that must be
2633 mirrored are assignments of rows of the desired frame matrix to the
2634 current frame matrix and scrolling the current frame matrix. */
2636 /* Build frame F's desired matrix from window matrices. Only windows
2637 which have the flag must_be_updated_p set have to be updated. Menu
2638 bar lines of a frame are not covered by window matrices, so make
2639 sure not to touch them in this function. */
2642 build_frame_matrix (f
)
2647 /* F must have a frame matrix when this function is called. */
2648 xassert (!FRAME_WINDOW_P (f
));
2650 /* Clear all rows in the frame matrix covered by window matrices.
2651 Menu bar lines are not covered by windows. */
2652 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2653 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2655 /* Build the matrix by walking the window tree. */
2656 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2657 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2661 /* Walk a window tree, building a frame matrix MATRIX from window
2662 matrices. W is the root of a window tree. */
2665 build_frame_matrix_from_window_tree (matrix
, w
)
2666 struct glyph_matrix
*matrix
;
2671 if (!NILP (w
->hchild
))
2672 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2673 else if (!NILP (w
->vchild
))
2674 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2676 build_frame_matrix_from_leaf_window (matrix
, w
);
2678 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2683 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2684 desired frame matrix built. W is a leaf window whose desired or
2685 current matrix is to be added to FRAME_MATRIX. W's flag
2686 must_be_updated_p determines which matrix it contributes to
2687 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2688 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2689 Adding a desired matrix means setting up used counters and such in
2690 frame rows, while adding a current window matrix to FRAME_MATRIX
2691 means copying glyphs. The latter case corresponds to
2692 preserve_other_columns in the old redisplay. */
2695 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2696 struct glyph_matrix
*frame_matrix
;
2699 struct glyph_matrix
*window_matrix
;
2700 int window_y
, frame_y
;
2701 /* If non-zero, a glyph to insert at the right border of W. */
2702 GLYPH right_border_glyph
= 0;
2704 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2705 if (w
->must_be_updated_p
)
2707 window_matrix
= w
->desired_matrix
;
2709 /* Decide whether we want to add a vertical border glyph. */
2710 if (!WINDOW_RIGHTMOST_P (w
))
2712 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2713 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2714 ? XINT (DISP_BORDER_GLYPH (dp
))
2719 window_matrix
= w
->current_matrix
;
2721 /* For all rows in the window matrix and corresponding rows in the
2724 frame_y
= window_matrix
->matrix_y
;
2725 while (window_y
< window_matrix
->nrows
)
2727 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2728 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2729 int current_row_p
= window_matrix
== w
->current_matrix
;
2731 /* Fill up the frame row with spaces up to the left margin of the
2733 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2735 /* Fill up areas in the window matrix row with spaces. */
2736 fill_up_glyph_row_with_spaces (window_row
);
2738 /* If only part of W's desired matrix has been built, and
2739 window_row wasn't displayed, use the corresponding current
2741 if (window_matrix
== w
->desired_matrix
2742 && !window_row
->enabled_p
)
2744 window_row
= w
->current_matrix
->rows
+ window_y
;
2750 /* Copy window row to frame row. */
2751 bcopy (window_row
->glyphs
[0],
2752 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2753 window_matrix
->matrix_w
* sizeof (struct glyph
));
2757 xassert (window_row
->enabled_p
);
2759 /* Only when a desired row has been displayed, we want
2760 the corresponding frame row to be updated. */
2761 frame_row
->enabled_p
= 1;
2763 /* Maybe insert a vertical border between horizontally adjacent
2765 if (right_border_glyph
)
2767 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2768 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2771 /* Window row window_y must be a slice of frame row
2773 xassert (glyph_row_slice_p (window_row
, frame_row
));
2775 /* If rows are in sync, we don't have to copy glyphs because
2776 frame and window share glyphs. */
2779 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2780 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2784 /* Set number of used glyphs in the frame matrix. Since we fill
2785 up with spaces, and visit leaf windows from left to right it
2786 can be done simply. */
2787 frame_row
->used
[TEXT_AREA
]
2788 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2797 /* Add spaces to a glyph row ROW in a window matrix.
2799 Each row has the form:
2801 +---------+-----------------------------+------------+
2802 | left | text | right |
2803 +---------+-----------------------------+------------+
2805 Left and right marginal areas are optional. This function adds
2806 spaces to areas so that there are no empty holes between areas.
2807 In other words: If the right area is not empty, the text area
2808 is filled up with spaces up to the right area. If the text area
2809 is not empty, the left area is filled up.
2811 To be called for frame-based redisplay, only. */
2814 fill_up_glyph_row_with_spaces (row
)
2815 struct glyph_row
*row
;
2817 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2818 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2819 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2823 /* Fill area AREA of glyph row ROW with spaces. To be called for
2824 frame-based redisplay only. */
2827 fill_up_glyph_row_area_with_spaces (row
, area
)
2828 struct glyph_row
*row
;
2831 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2833 struct glyph
*end
= row
->glyphs
[area
+ 1];
2834 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2837 *text
++ = space_glyph
;
2838 row
->used
[area
] = text
- row
->glyphs
[area
];
2843 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2844 reached. In frame matrices only one area, TEXT_AREA, is used. */
2847 fill_up_frame_row_with_spaces (row
, upto
)
2848 struct glyph_row
*row
;
2851 int i
= row
->used
[TEXT_AREA
];
2852 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2855 glyph
[i
++] = space_glyph
;
2857 row
->used
[TEXT_AREA
] = i
;
2862 /**********************************************************************
2863 Mirroring operations on frame matrices in window matrices
2864 **********************************************************************/
2866 /* Set frame being updated via frame-based redisplay to F. This
2867 function must be called before updates to make explicit that we are
2868 working on frame matrices or not. */
2871 set_frame_matrix_frame (f
)
2874 frame_matrix_frame
= f
;
2878 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2879 DESIRED_MATRIX is the desired matrix corresponding to
2880 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2881 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2882 frame_matrix_frame is non-null, this indicates that the exchange is
2883 done in frame matrices, and that we have to perform analogous
2884 operations in window matrices of frame_matrix_frame. */
2887 make_current (desired_matrix
, current_matrix
, row
)
2888 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2891 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2892 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2893 int mouse_face_p
= current_row
->mouse_face_p
;
2895 /* Do current_row = desired_row. This exchanges glyph pointers
2896 between both rows, and does a structure assignment otherwise. */
2897 assign_row (current_row
, desired_row
);
2899 /* Enable current_row to mark it as valid. */
2900 current_row
->enabled_p
= 1;
2901 current_row
->mouse_face_p
= mouse_face_p
;
2903 /* If we are called on frame matrices, perform analogous operations
2904 for window matrices. */
2905 if (frame_matrix_frame
)
2906 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2910 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2911 W's frame which has been made current (by swapping pointers between
2912 current and desired matrix). Perform analogous operations in the
2913 matrices of leaf windows in the window tree rooted at W. */
2916 mirror_make_current (w
, frame_row
)
2922 if (!NILP (w
->hchild
))
2923 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2924 else if (!NILP (w
->vchild
))
2925 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2928 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2929 here because the checks performed in debug mode there
2930 will not allow the conversion. */
2931 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2933 /* If FRAME_ROW is within W, assign the desired row to the
2934 current row (exchanging glyph pointers). */
2935 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2937 struct glyph_row
*current_row
2938 = MATRIX_ROW (w
->current_matrix
, row
);
2939 struct glyph_row
*desired_row
2940 = MATRIX_ROW (w
->desired_matrix
, row
);
2942 if (desired_row
->enabled_p
)
2943 assign_row (current_row
, desired_row
);
2945 swap_glyph_pointers (desired_row
, current_row
);
2946 current_row
->enabled_p
= 1;
2950 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2955 /* Perform row dance after scrolling. We are working on the range of
2956 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2957 including) in MATRIX. COPY_FROM is a vector containing, for each
2958 row I in the range 0 <= I < NLINES, the index of the original line
2959 to move to I. This index is relative to the row range, i.e. 0 <=
2960 index < NLINES. RETAINED_P is a vector containing zero for each
2961 row 0 <= I < NLINES which is empty.
2963 This function is called from do_scrolling and do_direct_scrolling. */
2966 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2968 struct glyph_matrix
*matrix
;
2969 int unchanged_at_top
, nlines
;
2973 /* A copy of original rows. */
2974 struct glyph_row
*old_rows
;
2976 /* Rows to assign to. */
2977 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2981 /* Make a copy of the original rows. */
2982 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2983 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2985 /* Assign new rows, maybe clear lines. */
2986 for (i
= 0; i
< nlines
; ++i
)
2988 int enabled_before_p
= new_rows
[i
].enabled_p
;
2990 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2991 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2992 new_rows
[i
] = old_rows
[copy_from
[i
]];
2993 new_rows
[i
].enabled_p
= enabled_before_p
;
2995 /* RETAINED_P is zero for empty lines. */
2996 if (!retained_p
[copy_from
[i
]])
2997 new_rows
[i
].enabled_p
= 0;
3000 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
3001 if (frame_matrix_frame
)
3002 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3003 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3007 /* Synchronize glyph pointers in the current matrix of window W with
3008 the current frame matrix. W must be full-width, and be on a tty
3012 sync_window_with_frame_matrix_rows (w
)
3015 struct frame
*f
= XFRAME (w
->frame
);
3016 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3018 /* Preconditions: W must be a leaf window and full-width. Its frame
3019 must have a frame matrix. */
3020 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3021 xassert (WINDOW_FULL_WIDTH_P (w
));
3022 xassert (!FRAME_WINDOW_P (f
));
3024 /* If W is a full-width window, glyph pointers in W's current matrix
3025 have, by definition, to be the same as glyph pointers in the
3026 corresponding frame matrix. */
3027 window_row
= w
->current_matrix
->rows
;
3028 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3029 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
3030 while (window_row
< window_row_end
)
3034 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
3035 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
3037 ++window_row
, ++frame_row
;
3042 /* Return the window in the window tree rooted in W containing frame
3043 row ROW. Value is null if none is found. */
3046 frame_row_to_window (w
, row
)
3050 struct window
*found
= NULL
;
3054 if (!NILP (w
->hchild
))
3055 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3056 else if (!NILP (w
->vchild
))
3057 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3058 else if (row
>= XFASTINT (w
->top
)
3059 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3062 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3069 /* Perform a line dance in the window tree rooted at W, after
3070 scrolling a frame matrix in mirrored_line_dance.
3072 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3073 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3074 COPY_FROM is a vector containing, for each row I in the range 0 <=
3075 I < NLINES, the index of the original line to move to I. This
3076 index is relative to the row range, i.e. 0 <= index < NLINES.
3077 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3081 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3083 int unchanged_at_top
, nlines
;
3089 if (!NILP (w
->hchild
))
3090 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3091 nlines
, copy_from
, retained_p
);
3092 else if (!NILP (w
->vchild
))
3093 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3094 nlines
, copy_from
, retained_p
);
3097 /* W is a leaf window, and we are working on its current
3099 struct glyph_matrix
*m
= w
->current_matrix
;
3101 struct glyph_row
*old_rows
;
3103 /* Make a copy of the original rows of matrix m. */
3104 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3105 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3107 for (i
= 0; i
< nlines
; ++i
)
3109 /* Frame relative line assigned to. */
3110 int frame_to
= i
+ unchanged_at_top
;
3112 /* Frame relative line assigned. */
3113 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3115 /* Window relative line assigned to. */
3116 int window_to
= frame_to
- m
->matrix_y
;
3118 /* Window relative line assigned. */
3119 int window_from
= frame_from
- m
->matrix_y
;
3121 /* Is assigned line inside window? */
3122 int from_inside_window_p
3123 = window_from
>= 0 && window_from
< m
->matrix_h
;
3125 /* Is assigned to line inside window? */
3126 int to_inside_window_p
3127 = window_to
>= 0 && window_to
< m
->matrix_h
;
3129 if (from_inside_window_p
&& to_inside_window_p
)
3131 /* Enabled setting before assignment. */
3132 int enabled_before_p
;
3134 /* Do the assignment. The enabled_p flag is saved
3135 over the assignment because the old redisplay did
3137 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3138 m
->rows
[window_to
] = old_rows
[window_from
];
3139 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3141 /* If frame line is empty, window line is empty, too. */
3142 if (!retained_p
[copy_from
[i
]])
3143 m
->rows
[window_to
].enabled_p
= 0;
3145 else if (to_inside_window_p
)
3147 /* A copy between windows. This is an infrequent
3148 case not worth optimizing. */
3149 struct frame
*f
= XFRAME (w
->frame
);
3150 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3152 struct glyph_matrix
*m2
;
3155 w2
= frame_row_to_window (root
, frame_to
);
3156 m2
= w2
->current_matrix
;
3157 m2_from
= frame_from
- m2
->matrix_y
;
3158 copy_row_except_pointers (m
->rows
+ window_to
,
3159 m2
->rows
+ m2_from
);
3161 /* If frame line is empty, window line is empty, too. */
3162 if (!retained_p
[copy_from
[i
]])
3163 m
->rows
[window_to
].enabled_p
= 0;
3166 else if (from_inside_window_p
)
3170 /* If there was a copy between windows, make sure glyph
3171 pointers are in sync with the frame matrix. */
3173 sync_window_with_frame_matrix_rows (w
);
3175 /* Check that no pointers are lost. */
3179 /* Next window on same level. */
3180 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3187 /* Check that window and frame matrices agree about their
3188 understanding where glyphs of the rows are to find. For each
3189 window in the window tree rooted at W, check that rows in the
3190 matrices of leaf window agree with their frame matrices about
3194 check_window_matrix_pointers (w
)
3199 if (!NILP (w
->hchild
))
3200 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3201 else if (!NILP (w
->vchild
))
3202 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3205 struct frame
*f
= XFRAME (w
->frame
);
3206 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3207 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3210 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3215 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3216 a window and FRAME_MATRIX is the corresponding frame matrix. For
3217 each row in WINDOW_MATRIX check that it's a slice of the
3218 corresponding frame row. If it isn't, abort. */
3221 check_matrix_pointers (window_matrix
, frame_matrix
)
3222 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3224 /* Row number in WINDOW_MATRIX. */
3227 /* Row number corresponding to I in FRAME_MATRIX. */
3228 int j
= window_matrix
->matrix_y
;
3230 /* For all rows check that the row in the window matrix is a
3231 slice of the row in the frame matrix. If it isn't we didn't
3232 mirror an operation on the frame matrix correctly. */
3233 while (i
< window_matrix
->nrows
)
3235 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3236 frame_matrix
->rows
+ j
))
3242 #endif /* GLYPH_DEBUG != 0 */
3246 /**********************************************************************
3247 VPOS and HPOS translations
3248 **********************************************************************/
3252 /* Translate vertical position VPOS which is relative to window W to a
3253 vertical position relative to W's frame. */
3256 window_to_frame_vpos (w
, vpos
)
3260 struct frame
*f
= XFRAME (w
->frame
);
3262 xassert (!FRAME_WINDOW_P (f
));
3263 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3264 vpos
+= XFASTINT (w
->top
);
3265 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3270 /* Translate horizontal position HPOS which is relative to window W to
3271 a vertical position relative to W's frame. */
3274 window_to_frame_hpos (w
, hpos
)
3278 struct frame
*f
= XFRAME (w
->frame
);
3280 xassert (!FRAME_WINDOW_P (f
));
3281 hpos
+= XFASTINT (w
->left
);
3285 #endif /* GLYPH_DEBUG */
3289 /**********************************************************************
3291 **********************************************************************/
3293 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3294 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3300 CHECK_LIVE_FRAME (frame
, 0);
3303 /* Ignore redraw requests, if frame has no glyphs yet.
3304 (Implementation note: It still has to be checked why we are
3305 called so early here). */
3306 if (!glyphs_initialized_initially_p
)
3310 if (FRAME_MSDOS_P (f
))
3311 set_terminal_modes ();
3313 clear_current_matrices (f
);
3316 windows_or_buffers_changed
++;
3317 /* Mark all windows as inaccurate, so that every window will have
3318 its redisplay done. */
3319 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3320 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3326 /* Redraw frame F. This is nothing more than a call to the Lisp
3327 function redraw-frame. */
3334 XSETFRAME (frame
, f
);
3335 Fredraw_frame (frame
);
3339 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3340 doc
: /* Clear and redisplay all visible frames. */)
3343 Lisp_Object tail
, frame
;
3345 FOR_EACH_FRAME (tail
, frame
)
3346 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3347 Fredraw_frame (frame
);
3353 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3354 visible frames marked as garbaged. */
3357 redraw_garbaged_frames ()
3359 Lisp_Object tail
, frame
;
3361 FOR_EACH_FRAME (tail
, frame
)
3362 if (FRAME_VISIBLE_P (XFRAME (frame
))
3363 && FRAME_GARBAGED_P (XFRAME (frame
)))
3364 Fredraw_frame (frame
);
3369 /***********************************************************************
3371 ***********************************************************************/
3373 /* Try to update display and current glyph matrix directly.
3375 This function is called after a character G has been inserted into
3376 current_buffer. It tries to update the current glyph matrix and
3377 perform appropriate screen output to reflect the insertion. If it
3378 succeeds, the global flag redisplay_performed_directly_p will be
3379 set to 1, and thereby prevent the more costly general redisplay
3380 from running (see redisplay_internal).
3382 This function is not called for `hairy' character insertions.
3383 In particular, it is not called when after or before change
3384 functions exist, like they are used by font-lock. See keyboard.c
3385 for details where this function is called. */
3388 direct_output_for_insert (g
)
3391 register struct frame
*f
= SELECTED_FRAME ();
3392 struct window
*w
= XWINDOW (selected_window
);
3394 struct glyph_row
*glyph_row
;
3395 struct glyph
*glyphs
, *glyph
, *end
;
3397 /* Non-null means that Redisplay of W is based on window matrices. */
3398 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3399 /* Non-null means we are in overwrite mode. */
3400 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3402 struct text_pos pos
;
3403 int delta
, delta_bytes
;
3405 /* Not done directly. */
3406 redisplay_performed_directly_p
= 0;
3408 /* Quickly give up for some common cases. */
3409 if (cursor_in_echo_area
3410 /* Give up if fonts have changed. */
3412 /* Give up if face attributes have been changed. */
3413 || face_change_count
3414 /* Give up if cursor position not really known. */
3415 || !display_completed
3416 /* Give up if buffer appears in two places. */
3417 || buffer_shared
> 1
3418 /* Give up if currently displaying a message instead of the
3419 minibuffer contents. */
3420 || (EQ (selected_window
, minibuf_window
)
3421 && EQ (minibuf_window
, echo_area_window
))
3422 /* Give up for hscrolled mini-buffer because display of the prompt
3423 is handled specially there (see display_line). */
3424 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3425 /* Give up if overwriting in the middle of a line. */
3428 && FETCH_BYTE (PT
) != '\n')
3429 /* Give up for tabs and line ends. */
3433 /* Give up if unable to display the cursor in the window. */
3434 || w
->cursor
.vpos
< 0
3435 /* Give up if we are showing a message or just cleared the message
3436 because we might need to resize the echo area window. */
3437 || !NILP (echo_area_buffer
[0])
3438 || !NILP (echo_area_buffer
[1])
3439 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3440 /* Can't do it in a continued line because continuation
3441 lines would change. */
3442 (glyph_row
->continued_p
3443 /* Can't use this method if the line overlaps others or is
3444 overlapped by others because these other lines would
3445 have to be redisplayed. */
3446 || glyph_row
->overlapping_p
3447 || glyph_row
->overlapped_p
))
3448 /* Can't do it for partial width windows on terminal frames
3449 because we can't clear to eol in such a window. */
3450 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3453 /* If we can't insert glyphs, we can use this method only
3454 at the end of a line. */
3455 if (!char_ins_del_ok
)
3456 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3459 /* Set up a display iterator structure for W. Glyphs will be
3460 produced in scratch_glyph_row. Current position is W's cursor
3462 clear_glyph_row (&scratch_glyph_row
);
3463 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3464 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3465 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3468 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3469 if (glyph_row
->mouse_face_p
)
3472 /* Give up if highlighting trailing whitespace and we have trailing
3473 whitespace in glyph_row. We would have to remove the trailing
3474 whitespace face in that case. */
3475 if (!NILP (Vshow_trailing_whitespace
)
3476 && glyph_row
->used
[TEXT_AREA
])
3480 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3481 if (last
->type
== STRETCH_GLYPH
3482 || (last
->type
== CHAR_GLYPH
3483 && last
->u
.ch
== ' '))
3487 /* Give up if there are overlay strings at pos. This would fail
3488 if the overlay string has newlines in it. */
3489 if (STRINGP (it
.string
))
3492 it
.hpos
= w
->cursor
.hpos
;
3493 it
.vpos
= w
->cursor
.vpos
;
3494 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3495 it
.current_y
= w
->cursor
.y
;
3496 it
.end_charpos
= PT
;
3497 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3498 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3500 /* More than one display element may be returned for PT - 1 if
3501 (i) it's a control character which is translated into `\003' or
3502 `^C', or (ii) it has a display table entry, or (iii) it's a
3503 combination of both. */
3504 delta
= delta_bytes
= 0;
3505 while (get_next_display_element (&it
))
3507 PRODUCE_GLYPHS (&it
);
3509 /* Give up if glyph doesn't fit completely on the line. */
3510 if (it
.current_x
>= it
.last_visible_x
)
3513 /* Give up if new glyph has different ascent or descent than
3514 the original row, or if it is not a character glyph. */
3515 if (glyph_row
->ascent
!= it
.ascent
3516 || glyph_row
->height
!= it
.ascent
+ it
.descent
3517 || glyph_row
->phys_ascent
!= it
.phys_ascent
3518 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3519 || it
.what
!= IT_CHARACTER
)
3523 delta_bytes
+= it
.len
;
3524 set_iterator_to_next (&it
, 1);
3527 /* Give up if we hit the right edge of the window. We would have
3528 to insert truncation or continuation glyphs. */
3529 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3530 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3533 /* Give up if there is a \t following in the line. */
3535 it2
.end_charpos
= ZV
;
3536 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3537 while (get_next_display_element (&it2
)
3538 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3542 set_iterator_to_next (&it2
, 1);
3545 /* Number of new glyphs produced. */
3546 n
= it
.glyph_row
->used
[TEXT_AREA
];
3548 /* Start and end of glyphs in original row. */
3549 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3550 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3552 /* Make room for new glyphs, then insert them. */
3553 xassert (end
- glyphs
- n
>= 0);
3554 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3555 (end
- glyphs
- n
) * sizeof (*end
));
3556 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3557 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3558 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3560 /* Compute new line width. */
3561 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3562 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3563 glyph_row
->pixel_width
= glyph_row
->x
;
3566 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3570 /* Increment buffer positions for glyphs following the newly
3572 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3573 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3574 glyph
->charpos
+= delta
;
3576 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3578 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3579 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3582 /* Adjust positions in lines following the one we are in. */
3583 increment_matrix_positions (w
->current_matrix
,
3585 w
->current_matrix
->nrows
,
3586 delta
, delta_bytes
);
3588 glyph_row
->contains_overlapping_glyphs_p
3589 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3591 glyph_row
->displays_text_p
= 1;
3592 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3593 XFASTINT (w
->window_end_vpos
)));
3595 if (!NILP (Vshow_trailing_whitespace
))
3596 highlight_trailing_whitespace (it
.f
, glyph_row
);
3598 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3599 In the middle, we have to insert glyphs. Note that this is now
3600 implemented for X frames. The implementation uses updated_window
3602 updated_row
= glyph_row
;
3603 updated_area
= TEXT_AREA
;
3607 rif
->update_window_begin_hook (w
);
3609 if (glyphs
== end
- n
3610 /* In front of a space added by append_space. */
3611 || (glyphs
== end
- n
- 1
3612 && (end
- n
)->charpos
<= 0))
3613 rif
->write_glyphs (glyphs
, n
);
3615 rif
->insert_glyphs (glyphs
, n
);
3619 if (glyphs
== end
- n
)
3620 write_glyphs (glyphs
, n
);
3622 insert_glyphs (glyphs
, n
);
3625 w
->cursor
.hpos
+= n
;
3626 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3627 xassert (w
->cursor
.hpos
>= 0
3628 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3630 /* How to set the cursor differs depending on whether we are
3631 using a frame matrix or a window matrix. Note that when
3632 a frame matrix is used, cursor_to expects frame coordinates,
3633 and the X and Y parameters are not used. */
3634 if (window_redisplay_p
)
3635 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3636 w
->cursor
.y
, w
->cursor
.x
);
3640 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3641 + (INTEGERP (w
->left_margin_width
)
3642 ? XFASTINT (w
->left_margin_width
)
3644 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3649 rif
->update_window_end_hook (w
, 1, 0);
3654 TRACE ((stderr
, "direct output for insert\n"));
3656 UNCHANGED_MODIFIED
= MODIFF
;
3657 BEG_UNCHANGED
= GPT
- BEG
;
3658 XSETFASTINT (w
->last_point
, PT
);
3659 w
->last_cursor
= w
->cursor
;
3660 XSETFASTINT (w
->last_modified
, MODIFF
);
3661 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3663 redisplay_performed_directly_p
= 1;
3668 /* Perform a direct display update for moving PT by N positions
3669 left or right. N < 0 means a movement backwards. This function
3670 is currently only called for N == 1 or N == -1. */
3673 direct_output_forward_char (n
)
3676 struct frame
*f
= SELECTED_FRAME ();
3677 struct window
*w
= XWINDOW (selected_window
);
3678 struct glyph_row
*row
;
3680 /* Give up if point moved out of or into a composition. */
3681 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3682 current_buffer
, PT
))
3685 /* Give up if face attributes have been changed. */
3686 if (face_change_count
)
3689 /* Give up if current matrix is not up to date or we are
3690 displaying a message. */
3691 if (!display_completed
|| cursor_in_echo_area
)
3694 /* Give up if the buffer's direction is reversed. */
3695 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3698 /* Can't use direct output if highlighting a region. */
3699 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3702 /* Can't use direct output if highlighting trailing whitespace. */
3703 if (!NILP (Vshow_trailing_whitespace
))
3706 /* Give up if we are showing a message or just cleared the message
3707 because we might need to resize the echo area window. */
3708 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3711 /* Give up if currently displaying a message instead of the
3712 minibuffer contents. */
3713 if (XWINDOW (minibuf_window
) == w
3714 && EQ (minibuf_window
, echo_area_window
))
3717 /* Give up if we don't know where the cursor is. */
3718 if (w
->cursor
.vpos
< 0)
3721 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3723 /* Give up if PT is outside of the last known cursor row. */
3724 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3725 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3728 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3730 w
->last_cursor
= w
->cursor
;
3731 XSETFASTINT (w
->last_point
, PT
);
3733 xassert (w
->cursor
.hpos
>= 0
3734 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3736 if (FRAME_WINDOW_P (f
))
3737 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3738 w
->cursor
.y
, w
->cursor
.x
);
3742 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3743 + (INTEGERP (w
->left_margin_width
)
3744 ? XFASTINT (w
->left_margin_width
)
3746 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3751 redisplay_performed_directly_p
= 1;
3757 /***********************************************************************
3759 ***********************************************************************/
3761 /* Update frame F based on the data in desired matrices.
3763 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3764 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3767 Value is non-zero if redisplay was stopped due to pending input. */
3770 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3773 int inhibit_hairy_id_p
;
3775 /* 1 means display has been paused because of pending input. */
3777 struct window
*root_window
= XWINDOW (f
->root_window
);
3779 if (FRAME_WINDOW_P (f
))
3781 /* We are working on window matrix basis. All windows whose
3782 flag must_be_updated_p is set have to be updated. */
3784 /* Record that we are not working on frame matrices. */
3785 set_frame_matrix_frame (NULL
);
3787 /* Update all windows in the window tree of F, maybe stopping
3788 when pending input is detected. */
3791 /* Update the menu bar on X frames that don't have toolkit
3793 if (WINDOWP (f
->menu_bar_window
))
3794 update_window (XWINDOW (f
->menu_bar_window
), 1);
3796 /* Update the tool-bar window, if present. */
3797 if (WINDOWP (f
->tool_bar_window
))
3800 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3802 /* Update tool-bar window. */
3803 if (w
->must_be_updated_p
)
3805 update_window (w
, 1);
3806 w
->must_be_updated_p
= 0;
3808 /* Swap tool-bar strings. We swap because we want to
3810 tem
= f
->current_tool_bar_string
;
3811 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3812 f
->desired_tool_bar_string
= tem
;
3817 /* Update windows. */
3818 paused_p
= update_window_tree (root_window
, force_p
);
3821 #if 0 /* This flush is a performance bottleneck under X,
3822 and it doesn't seem to be necessary anyway. */
3823 rif
->flush_display (f
);
3828 /* We are working on frame matrix basis. Set the frame on whose
3829 frame matrix we operate. */
3830 set_frame_matrix_frame (f
);
3832 /* Build F's desired matrix from window matrices. */
3833 build_frame_matrix (f
);
3835 /* Update the display */
3837 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3841 fflush (termscript
);
3844 /* Check window matrices for lost pointers. */
3846 check_window_matrix_pointers (root_window
);
3847 add_frame_display_history (f
, paused_p
);
3851 /* Reset flags indicating that a window should be updated. */
3852 set_window_update_flags (root_window
, 0);
3854 display_completed
= !paused_p
;
3860 /************************************************************************
3861 Window-based updates
3862 ************************************************************************/
3864 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3865 don't stop updating when input is pending. */
3868 update_window_tree (w
, force_p
)
3874 while (w
&& !paused_p
)
3876 if (!NILP (w
->hchild
))
3877 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3878 else if (!NILP (w
->vchild
))
3879 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3880 else if (w
->must_be_updated_p
)
3881 paused_p
|= update_window (w
, force_p
);
3883 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3890 /* Update window W if its flag must_be_updated_p is non-zero. If
3891 FORCE_P is non-zero, don't stop updating if input is pending. */
3894 update_single_window (w
, force_p
)
3898 if (w
->must_be_updated_p
)
3900 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3902 /* Record that this is not a frame-based redisplay. */
3903 set_frame_matrix_frame (NULL
);
3907 update_window (w
, force_p
);
3910 /* Reset flag in W. */
3911 w
->must_be_updated_p
= 0;
3916 /* Redraw lines from the current matrix of window W that are
3917 overlapped by other rows. YB is bottom-most y-position in W. */
3920 redraw_overlapped_rows (w
, yb
)
3926 /* If rows overlapping others have been changed, the rows being
3927 overlapped have to be redrawn. This won't draw lines that have
3928 already been drawn in update_window_line because overlapped_p in
3929 desired rows is 0, so after row assignment overlapped_p in
3930 current rows is 0. */
3931 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3933 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3935 if (!row
->enabled_p
)
3937 else if (row
->mode_line_p
)
3940 if (row
->overlapped_p
)
3942 enum glyph_row_area area
;
3944 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3947 updated_area
= area
;
3948 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3949 if (row
->used
[area
])
3950 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3951 rif
->clear_end_of_line (-1);
3954 row
->overlapped_p
= 0;
3957 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3963 /* Redraw lines from the current matrix of window W that overlap
3964 others. YB is bottom-most y-position in W. */
3967 redraw_overlapping_rows (w
, yb
)
3972 struct glyph_row
*row
;
3974 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3976 row
= w
->current_matrix
->rows
+ i
;
3978 if (!row
->enabled_p
)
3980 else if (row
->mode_line_p
)
3983 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3985 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3987 if (row
->used
[LEFT_MARGIN_AREA
])
3988 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3990 if (row
->used
[TEXT_AREA
])
3991 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3993 if (row
->used
[RIGHT_MARGIN_AREA
])
3994 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3996 /* Record in neighbor rows that ROW overwrites part of their
3998 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3999 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4000 if ((row
->phys_height
- row
->phys_ascent
4001 > row
->height
- row
->ascent
)
4003 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4014 /* Check that no row in the current matrix of window W is enabled
4015 which is below what's displayed in the window. */
4018 check_current_matrix_flags (w
)
4021 int last_seen_p
= 0;
4022 int i
, yb
= window_text_bottom_y (w
);
4024 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4026 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4027 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4029 else if (last_seen_p
&& row
->enabled_p
)
4034 #endif /* GLYPH_DEBUG */
4037 /* Update display of window W. FORCE_P non-zero means that we should
4038 not stop when detecting pending input. */
4041 update_window (w
, force_p
)
4045 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4047 int preempt_count
= baud_rate
/ 2400 + 1;
4048 extern int input_pending
;
4049 extern Lisp_Object do_mouse_tracking
;
4051 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4052 extern struct frame
*updating_frame
;
4055 /* Check that W's frame doesn't have glyph matrices. */
4056 xassert (FRAME_WINDOW_P (f
));
4057 xassert (updating_frame
!= NULL
);
4059 /* Check pending input the first time so that we can quickly return. */
4060 if (redisplay_dont_pause
)
4063 detect_input_pending ();
4065 /* If forced to complete the update, or if no input is pending, do
4067 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4069 struct glyph_row
*row
, *end
;
4070 struct glyph_row
*mode_line_row
;
4071 struct glyph_row
*header_line_row
;
4072 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4074 rif
->update_window_begin_hook (w
);
4075 yb
= window_text_bottom_y (w
);
4077 /* If window has a top line, update it before everything else.
4078 Adjust y-positions of other rows by the top line height. */
4079 row
= desired_matrix
->rows
;
4080 end
= row
+ desired_matrix
->nrows
- 1;
4082 if (row
->mode_line_p
)
4084 header_line_row
= row
;
4088 header_line_row
= NULL
;
4090 /* Update the mode line, if necessary. */
4091 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4092 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4094 mode_line_row
->y
= yb
;
4095 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4097 &mouse_face_overwritten_p
);
4101 /* Find first enabled row. Optimizations in redisplay_internal
4102 may lead to an update with only one row enabled. There may
4103 be also completely empty matrices. */
4104 while (row
< end
&& !row
->enabled_p
)
4107 /* Try reusing part of the display by copying. */
4108 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4110 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4113 /* All rows were found to be equal. */
4118 /* We've scrolled the display. */
4123 /* Update the top mode line after scrolling because a new top
4124 line would otherwise overwrite lines at the top of the window
4125 that can be scrolled. */
4126 if (header_line_row
&& header_line_row
->enabled_p
)
4128 header_line_row
->y
= 0;
4129 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4133 /* Update the rest of the lines. */
4134 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4137 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4140 /* We'll Have to play a little bit with when to
4141 detect_input_pending. If it's done too often,
4142 scrolling large windows with repeated scroll-up
4143 commands will too quickly pause redisplay. */
4144 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4145 detect_input_pending ();
4147 changed_p
|= update_window_line (w
, vpos
,
4148 &mouse_face_overwritten_p
);
4150 /* Mark all rows below the last visible one in the current
4151 matrix as invalid. This is necessary because of
4152 variable line heights. Consider the case of three
4153 successive redisplays, where the first displays 5
4154 lines, the second 3 lines, and the third 5 lines again.
4155 If the second redisplay wouldn't mark rows in the
4156 current matrix invalid, the third redisplay might be
4157 tempted to optimize redisplay based on lines displayed
4158 in the first redisplay. */
4159 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4160 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4161 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4164 /* Was display preempted? */
4165 paused_p
= row
< end
;
4169 /* Fix the appearance of overlapping(overlapped rows. */
4170 if (!paused_p
&& !w
->pseudo_window_p
)
4172 if (changed_p
&& rif
->fix_overlapping_area
)
4174 redraw_overlapped_rows (w
, yb
);
4175 redraw_overlapping_rows (w
, yb
);
4178 /* Make cursor visible at cursor position of W. */
4179 set_window_cursor_after_update (w
);
4181 #if 0 /* Check that current matrix invariants are satisfied. This is
4182 for debugging only. See the comment of check_matrix_invariants. */
4183 IF_DEBUG (check_matrix_invariants (w
));
4188 /* Remember the redisplay method used to display the matrix. */
4189 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4192 /* End the update of window W. Don't set the cursor if we
4193 paused updating the display because in this case,
4194 set_window_cursor_after_update hasn't been called, and
4195 output_cursor doesn't contain the cursor location. */
4196 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4202 /* check_current_matrix_flags (w); */
4203 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4206 clear_glyph_matrix (desired_matrix
);
4212 /* Update the display of area AREA in window W, row number VPOS.
4213 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4216 update_marginal_area (w
, area
, vpos
)
4220 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4222 /* Let functions in xterm.c know what area subsequent X positions
4223 will be relative to. */
4224 updated_area
= area
;
4226 /* Set cursor to start of glyphs, write them, and clear to the end
4227 of the area. I don't think that something more sophisticated is
4228 necessary here, since marginal areas will not be the default. */
4229 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4230 if (desired_row
->used
[area
])
4231 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4232 rif
->clear_end_of_line (-1);
4236 /* Update the display of the text area of row VPOS in window W.
4237 Value is non-zero if display has changed. */
4240 update_text_area (w
, vpos
)
4244 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4245 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4248 /* Let functions in xterm.c know what area subsequent X positions
4249 will be relative to. */
4250 updated_area
= TEXT_AREA
;
4252 /* If rows are at different X or Y, or rows have different height,
4253 or the current row is marked invalid, write the entire line. */
4254 if (!current_row
->enabled_p
4255 || desired_row
->y
!= current_row
->y
4256 || desired_row
->ascent
!= current_row
->ascent
4257 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4258 || desired_row
->phys_height
!= current_row
->phys_height
4259 || desired_row
->visible_height
!= current_row
->visible_height
4260 || current_row
->overlapped_p
4261 || current_row
->mouse_face_p
4262 || current_row
->x
!= desired_row
->x
)
4264 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4266 if (desired_row
->used
[TEXT_AREA
])
4267 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4268 desired_row
->used
[TEXT_AREA
]);
4270 /* Clear to end of window. */
4271 rif
->clear_end_of_line (-1);
4277 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4278 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4279 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4280 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4282 /* If the desired row extends its face to the text area end,
4283 make sure we write at least one glyph, so that the face
4284 extension actually takes place. */
4285 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4288 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4292 /* Loop over glyphs that current and desired row may have
4298 /* Skip over glyphs that both rows have in common. These
4299 don't have to be written. We can't skip if the last
4300 current glyph overlaps the glyph to its right. For
4301 example, consider a current row of `if ' with the `f' in
4302 Courier bold so that it overlaps the ` ' to its right.
4303 If the desired row is ` ', we would skip over the space
4304 after the `if' and there would remain a pixel from the
4305 `f' on the screen. */
4306 if (overlapping_glyphs_p
&& i
> 0)
4308 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4311 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4313 can_skip_p
= right
== 0;
4319 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4321 x
+= desired_glyph
->pixel_width
;
4322 ++desired_glyph
, ++current_glyph
, ++i
;
4325 /* Consider the case that the current row contains "xxx
4326 ppp ggg" in italic Courier font, and the desired row
4327 is "xxx ggg". The character `p' has lbearing, `g'
4328 has not. The loop above will stop in front of the
4329 first `p' in the current row. If we would start
4330 writing glyphs there, we wouldn't erase the lbearing
4331 of the `p'. The rest of the lbearing problem is then
4332 taken care of by x_draw_glyphs. */
4333 if (overlapping_glyphs_p
4335 && i
< current_row
->used
[TEXT_AREA
]
4336 && (current_row
->used
[TEXT_AREA
]
4337 != desired_row
->used
[TEXT_AREA
]))
4341 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4343 while (left
> 0 && i
> 0)
4345 --i
, --desired_glyph
, --current_glyph
;
4346 x
-= desired_glyph
->pixel_width
;
4347 left
-= desired_glyph
->pixel_width
;
4352 /* Try to avoid writing the entire rest of the desired row
4353 by looking for a resync point. This mainly prevents
4354 mode line flickering in the case the mode line is in
4355 fixed-pitch font, which it usually will be. */
4356 if (i
< desired_row
->used
[TEXT_AREA
])
4358 int start_x
= x
, start_hpos
= i
;
4359 struct glyph
*start
= desired_glyph
;
4361 int skip_first_p
= !can_skip_p
;
4363 /* Find the next glyph that's equal again. */
4366 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4369 x
+= desired_glyph
->pixel_width
;
4370 current_x
+= current_glyph
->pixel_width
;
4371 ++desired_glyph
, ++current_glyph
, ++i
;
4375 if (i
== start_hpos
|| x
!= current_x
)
4379 desired_glyph
= start
;
4383 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4384 rif
->write_glyphs (start
, i
- start_hpos
);
4389 /* Write the rest. */
4390 if (i
< desired_row
->used
[TEXT_AREA
])
4392 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4393 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4397 /* Maybe clear to end of line. */
4398 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4400 /* If new row extends to the end of the text area, nothing
4401 has to be cleared, if and only if we did a write_glyphs
4402 above. This is made sure by setting desired_stop_pos
4403 appropriately above. */
4404 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4406 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4408 /* If old row extends to the end of the text area, clear. */
4409 if (i
>= desired_row
->used
[TEXT_AREA
])
4410 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4411 desired_row
->x
+ desired_row
->pixel_width
);
4412 rif
->clear_end_of_line (-1);
4415 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4417 /* Otherwise clear to the end of the old row. Everything
4418 after that position should be clear already. */
4421 if (i
>= desired_row
->used
[TEXT_AREA
])
4422 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4423 desired_row
->x
+ desired_row
->pixel_width
);
4425 /* If cursor is displayed at the end of the line, make sure
4426 it's cleared. Nowadays we don't have a phys_cursor_glyph
4427 with which to erase the cursor (because this method
4428 doesn't work with lbearing/rbearing), so we must do it
4430 if (vpos
== w
->phys_cursor
.vpos
4431 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4433 w
->phys_cursor_on_p
= 0;
4437 x
= current_row
->x
+ current_row
->pixel_width
;
4438 rif
->clear_end_of_line (x
);
4447 /* Update row VPOS in window W. Value is non-zero if display has been
4451 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4453 int vpos
, *mouse_face_overwritten_p
;
4455 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4456 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4459 /* Set the row being updated. This is important to let xterm.c
4460 know what line height values are in effect. */
4461 updated_row
= desired_row
;
4463 /* A row can be completely invisible in case a desired matrix was
4464 built with a vscroll and then make_cursor_line_fully_visible shifts
4465 the matrix. Make sure to make such rows current anyway, since
4466 we need the correct y-position, for example, in the current matrix. */
4467 if (desired_row
->mode_line_p
4468 || desired_row
->visible_height
> 0)
4470 xassert (desired_row
->enabled_p
);
4472 /* Update display of the left margin area, if there is one. */
4473 if (!desired_row
->full_width_p
4474 && !NILP (w
->left_margin_width
))
4477 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4480 /* Update the display of the text area. */
4481 if (update_text_area (w
, vpos
))
4484 if (current_row
->mouse_face_p
)
4485 *mouse_face_overwritten_p
= 1;
4488 /* Update display of the right margin area, if there is one. */
4489 if (!desired_row
->full_width_p
4490 && !NILP (w
->right_margin_width
))
4493 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4496 /* Draw truncation marks etc. */
4497 if (!current_row
->enabled_p
4498 || desired_row
->y
!= current_row
->y
4499 || desired_row
->visible_height
!= current_row
->visible_height
4500 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4501 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4502 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4503 || desired_row
->continued_p
!= current_row
->continued_p
4504 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4505 || (desired_row
->indicate_empty_line_p
4506 != current_row
->indicate_empty_line_p
)
4507 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4508 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4509 rif
->after_update_window_line_hook (desired_row
);
4512 /* Update current_row from desired_row. */
4513 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4519 /* Set the cursor after an update of window W. This function may only
4520 be called from update_window. */
4523 set_window_cursor_after_update (w
)
4526 struct frame
*f
= XFRAME (w
->frame
);
4527 int cx
, cy
, vpos
, hpos
;
4529 /* Not intended for frame matrix updates. */
4530 xassert (FRAME_WINDOW_P (f
));
4532 if (cursor_in_echo_area
4533 && !NILP (echo_area_buffer
[0])
4534 /* If we are showing a message instead of the mini-buffer,
4535 show the cursor for the message instead. */
4536 && XWINDOW (minibuf_window
) == w
4537 && EQ (minibuf_window
, echo_area_window
)
4538 /* These cases apply only to the frame that contains
4539 the active mini-buffer window. */
4540 && FRAME_HAS_MINIBUF_P (f
)
4541 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4543 cx
= cy
= vpos
= hpos
= 0;
4545 if (cursor_in_echo_area
>= 0)
4547 /* If the mini-buffer is several lines high, find the last
4548 line that has any text on it. Note: either all lines
4549 are enabled or none. Otherwise we wouldn't be able to
4551 struct glyph_row
*row
, *last_row
;
4552 struct glyph
*glyph
;
4553 int yb
= window_text_bottom_y (w
);
4556 row
= w
->current_matrix
->rows
;
4557 while (row
->enabled_p
4558 && (last_row
== NULL
4559 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4561 if (row
->used
[TEXT_AREA
]
4562 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4569 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4570 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4572 while (last
> start
&& last
->charpos
< 0)
4575 for (glyph
= start
; glyph
< last
; ++glyph
)
4577 cx
+= glyph
->pixel_width
;
4582 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4590 hpos
= w
->cursor
.hpos
;
4591 vpos
= w
->cursor
.vpos
;
4594 /* Window cursor can be out of sync for horizontally split windows. */
4595 hpos
= max (0, hpos
);
4596 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4597 vpos
= max (0, vpos
);
4598 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4599 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4603 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4604 tree rooted at W. */
4607 set_window_update_flags (w
, on_p
)
4613 if (!NILP (w
->hchild
))
4614 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4615 else if (!NILP (w
->vchild
))
4616 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4618 w
->must_be_updated_p
= on_p
;
4620 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4626 /***********************************************************************
4627 Window-Based Scrolling
4628 ***********************************************************************/
4630 /* Structure describing rows in scrolling_window. */
4634 /* Number of occurrences of this row in desired and current matrix. */
4635 int old_uses
, new_uses
;
4637 /* Vpos of row in new matrix. */
4638 int new_line_number
;
4640 /* Bucket index of this row_entry in the hash table row_table. */
4643 /* The row described by this entry. */
4644 struct glyph_row
*row
;
4646 /* Hash collision chain. */
4647 struct row_entry
*next
;
4650 /* A pool to allocate row_entry structures from, and the size of the
4651 pool. The pool is reallocated in scrolling_window when we find
4652 that we need a larger one. */
4654 static struct row_entry
*row_entry_pool
;
4655 static int row_entry_pool_size
;
4657 /* Index of next free entry in row_entry_pool. */
4659 static int row_entry_idx
;
4661 /* The hash table used during scrolling, and the table's size. This
4662 table is used to quickly identify equal rows in the desired and
4665 static struct row_entry
**row_table
;
4666 static int row_table_size
;
4668 /* Vectors of pointers to row_entry structures belonging to the
4669 current and desired matrix, and the size of the vectors. */
4671 static struct row_entry
**old_lines
, **new_lines
;
4672 static int old_lines_size
, new_lines_size
;
4674 /* A pool to allocate run structures from, and its size. */
4676 static struct run
*run_pool
;
4677 static int runs_size
;
4679 /* A vector of runs of lines found during scrolling. */
4681 static struct run
**runs
;
4683 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4684 struct glyph_row
*));
4687 /* Add glyph row ROW to the scrolling hash table during the scrolling
4690 static INLINE
struct row_entry
*
4691 add_row_entry (w
, row
)
4693 struct glyph_row
*row
;
4695 struct row_entry
*entry
;
4696 int i
= row
->hash
% row_table_size
;
4698 entry
= row_table
[i
];
4699 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4700 entry
= entry
->next
;
4704 entry
= row_entry_pool
+ row_entry_idx
++;
4706 entry
->old_uses
= entry
->new_uses
= 0;
4707 entry
->new_line_number
= 0;
4709 entry
->next
= row_table
[i
];
4710 row_table
[i
] = entry
;
4717 /* Try to reuse part of the current display of W by scrolling lines.
4718 HEADER_LINE_P non-zero means W has a top mode line.
4720 The algorithm is taken from Communications of the ACM, Apr78 "A
4721 Technique for Isolating Differences Between Files." It should take
4724 A short outline of the steps of the algorithm
4726 1. Skip lines equal at the start and end of both matrices.
4728 2. Enter rows in the current and desired matrix into a symbol
4729 table, counting how often they appear in both matrices.
4731 3. Rows that appear exactly once in both matrices serve as anchors,
4732 i.e. we assume that such lines are likely to have been moved.
4734 4. Starting from anchor lines, extend regions to be scrolled both
4735 forward and backward.
4739 -1 if all rows were found to be equal.
4740 0 to indicate that we did not scroll the display, or
4741 1 if we did scroll. */
4744 scrolling_window (w
, header_line_p
)
4748 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4749 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4750 int yb
= window_text_bottom_y (w
);
4751 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4752 int nruns
, nbytes
, n
, run_idx
;
4753 struct row_entry
*entry
;
4755 /* Skip over rows equal at the start. */
4756 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4758 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4759 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4764 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4765 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4766 && row_equal_p (w
, c
, d
, 1))
4775 /* Give up if some rows in the desired matrix are not enabled. */
4776 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4779 first_old
= first_new
= i
;
4781 /* Set last_new to the index + 1 of the last enabled row in the
4784 while (i
< desired_matrix
->nrows
- 1
4785 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4786 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4789 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4794 /* Set last_old to the index + 1 of the last enabled row in the
4795 current matrix. We don't look at the enabled flag here because
4796 we plan to reuse part of the display even if other parts are
4799 while (i
< current_matrix
->nrows
- 1)
4801 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4810 /* Skip over rows equal at the bottom. */
4813 while (i
- 1 > first_new
4814 && j
- 1 > first_old
4815 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4816 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4817 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4819 MATRIX_ROW (desired_matrix
, i
- 1),
4820 MATRIX_ROW (current_matrix
, j
- 1), 1))
4825 /* Nothing to do if all rows are equal. */
4826 if (last_new
== first_new
)
4829 /* Reallocate vectors, tables etc. if necessary. */
4831 if (current_matrix
->nrows
> old_lines_size
)
4833 old_lines_size
= current_matrix
->nrows
;
4834 nbytes
= old_lines_size
* sizeof *old_lines
;
4835 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4838 if (desired_matrix
->nrows
> new_lines_size
)
4840 new_lines_size
= desired_matrix
->nrows
;
4841 nbytes
= new_lines_size
* sizeof *new_lines
;
4842 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4845 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4846 if (3 * n
> row_table_size
)
4848 row_table_size
= next_almost_prime (3 * n
);
4849 nbytes
= row_table_size
* sizeof *row_table
;
4850 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4851 bzero (row_table
, nbytes
);
4854 if (n
> row_entry_pool_size
)
4856 row_entry_pool_size
= n
;
4857 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4858 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4861 if (desired_matrix
->nrows
> runs_size
)
4863 runs_size
= desired_matrix
->nrows
;
4864 nbytes
= runs_size
* sizeof *runs
;
4865 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4866 nbytes
= runs_size
* sizeof *run_pool
;
4867 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4870 nruns
= run_idx
= 0;
4873 /* Add rows from the current and desired matrix to the hash table
4874 row_hash_table to be able to find equal ones quickly. */
4876 for (i
= first_old
; i
< last_old
; ++i
)
4878 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4880 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4881 old_lines
[i
] = entry
;
4885 old_lines
[i
] = NULL
;
4888 for (i
= first_new
; i
< last_new
; ++i
)
4890 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4891 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4893 entry
->new_line_number
= i
;
4894 new_lines
[i
] = entry
;
4897 /* Identify moves based on lines that are unique and equal
4898 in both matrices. */
4899 for (i
= first_old
; i
< last_old
;)
4901 && old_lines
[i
]->old_uses
== 1
4902 && old_lines
[i
]->new_uses
== 1)
4905 int new_line
= old_lines
[i
]->new_line_number
;
4906 struct run
*run
= run_pool
+ run_idx
++;
4909 run
->current_vpos
= i
;
4910 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4911 run
->desired_vpos
= new_line
;
4912 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4914 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4916 /* Extend backward. */
4919 while (j
> first_old
4921 && old_lines
[j
] == new_lines
[k
])
4923 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4924 --run
->current_vpos
;
4925 --run
->desired_vpos
;
4928 run
->desired_y
-= h
;
4929 run
->current_y
-= h
;
4933 /* Extend forward. */
4938 && old_lines
[j
] == new_lines
[k
])
4940 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4946 /* Insert run into list of all runs. Order runs by copied
4947 pixel lines. Note that we record runs that don't have to
4948 be copied because they are already in place. This is done
4949 because we can avoid calling update_window_line in this
4951 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4953 for (k
= nruns
; k
> j
; --k
)
4954 runs
[k
] = runs
[k
- 1];
4963 /* Do the moves. Do it in a way that we don't overwrite something
4964 we want to copy later on. This is not solvable in general
4965 because there is only one display and we don't have a way to
4966 exchange areas on this display. Example:
4968 +-----------+ +-----------+
4970 +-----------+ --> +-----------+
4972 +-----------+ +-----------+
4974 Instead, prefer bigger moves, and invalidate moves that would
4975 copy from where we copied to. */
4977 for (i
= 0; i
< nruns
; ++i
)
4978 if (runs
[i
]->nrows
> 0)
4980 struct run
*r
= runs
[i
];
4982 /* Copy on the display. */
4983 if (r
->current_y
!= r
->desired_y
)
4985 rif
->scroll_run_hook (w
, r
);
4987 /* Invalidate runs that copy from where we copied to. */
4988 for (j
= i
+ 1; j
< nruns
; ++j
)
4990 struct run
*p
= runs
[j
];
4992 if ((p
->current_y
>= r
->desired_y
4993 && p
->current_y
< r
->desired_y
+ r
->height
)
4994 || (p
->current_y
+ p
->height
>= r
->desired_y
4995 && (p
->current_y
+ p
->height
4996 < r
->desired_y
+ r
->height
)))
5001 /* Assign matrix rows. */
5002 for (j
= 0; j
< r
->nrows
; ++j
)
5004 struct glyph_row
*from
, *to
;
5005 int to_overlapped_p
;
5007 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5008 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5009 to_overlapped_p
= to
->overlapped_p
;
5010 assign_row (to
, from
);
5011 to
->enabled_p
= 1, from
->enabled_p
= 0;
5012 to
->overlapped_p
= to_overlapped_p
;
5016 /* Clear the hash table, for the next time. */
5017 for (i
= 0; i
< row_entry_idx
; ++i
)
5018 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5020 /* Value is non-zero to indicate that we scrolled the display. */
5026 /************************************************************************
5028 ************************************************************************/
5030 /* Update the desired frame matrix of frame F.
5032 FORCE_P non-zero means that the update should not be stopped by
5033 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5034 should not be tried.
5036 Value is non-zero if update was stopped due to pending input. */
5039 update_frame_1 (f
, force_p
, inhibit_id_p
)
5044 /* Frame matrices to work on. */
5045 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5046 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5049 int preempt_count
= baud_rate
/ 2400 + 1;
5050 extern int input_pending
;
5052 xassert (current_matrix
&& desired_matrix
);
5054 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5055 calculate_costs (f
);
5057 if (preempt_count
<= 0)
5060 if (redisplay_dont_pause
)
5062 else if (!force_p
&& detect_input_pending ())
5068 /* If we cannot insert/delete lines, it's no use trying it. */
5069 if (!line_ins_del_ok
)
5072 /* See if any of the desired lines are enabled; don't compute for
5073 i/d line if just want cursor motion. */
5074 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5075 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5078 /* Try doing i/d line, if not yet inhibited. */
5079 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5080 force_p
|= scrolling (f
);
5082 /* Update the individual lines as needed. Do bottom line first. */
5083 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5084 update_frame_line (f
, desired_matrix
->nrows
- 1);
5086 /* Now update the rest of the lines. */
5087 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5089 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5091 if (FRAME_TERMCAP_P (f
))
5093 /* Flush out every so many lines.
5094 Also flush out if likely to have more than 1k buffered
5095 otherwise. I'm told that some telnet connections get
5096 really screwed by more than 1k output at once. */
5097 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5099 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5102 if (preempt_count
== 1)
5104 #ifdef EMACS_OUTQSIZE
5105 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5106 /* Probably not a tty. Ignore the error and reset
5107 * the outq count. */
5108 outq
= PENDING_OUTPUT_COUNT (stdout
);
5111 if (baud_rate
<= outq
&& baud_rate
> 0)
5112 sleep (outq
/ baud_rate
);
5117 if ((i
- 1) % preempt_count
== 0)
5118 detect_input_pending ();
5120 update_frame_line (f
, i
);
5124 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5126 /* Now just clean up termcap drivers and set cursor, etc. */
5129 if ((cursor_in_echo_area
5130 /* If we are showing a message instead of the mini-buffer,
5131 show the cursor for the message instead of for the
5132 (now hidden) mini-buffer contents. */
5133 || (EQ (minibuf_window
, selected_window
)
5134 && EQ (minibuf_window
, echo_area_window
)
5135 && !NILP (echo_area_buffer
[0])))
5136 /* These cases apply only to the frame that contains
5137 the active mini-buffer window. */
5138 && FRAME_HAS_MINIBUF_P (f
)
5139 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5141 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5144 if (cursor_in_echo_area
< 0)
5146 /* Negative value of cursor_in_echo_area means put
5147 cursor at beginning of line. */
5153 /* Positive value of cursor_in_echo_area means put
5154 cursor at the end of the prompt. If the mini-buffer
5155 is several lines high, find the last line that has
5157 row
= FRAME_HEIGHT (f
);
5163 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5165 /* Frame rows are filled up with spaces that
5166 must be ignored here. */
5167 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5169 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5170 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5173 && (last
- 1)->charpos
< 0)
5179 while (row
> top
&& col
== 0);
5181 /* Make sure COL is not out of range. */
5182 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5184 /* If we have another row, advance cursor into it. */
5185 if (row
< FRAME_HEIGHT (f
) - 1)
5187 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5190 /* Otherwise move it back in range. */
5192 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5196 cursor_to (row
, col
);
5200 /* We have only one cursor on terminal frames. Use it to
5201 display the cursor of the selected window. */
5202 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5203 if (w
->cursor
.vpos
>= 0
5204 /* The cursor vpos may be temporarily out of bounds
5205 in the following situation: There is one window,
5206 with the cursor in the lower half of it. The window
5207 is split, and a message causes a redisplay before
5208 a new cursor position has been computed. */
5209 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5211 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5212 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5214 if (INTEGERP (w
->left_margin_width
))
5215 x
+= XFASTINT (w
->left_margin_width
);
5217 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5225 clear_desired_matrices (f
);
5230 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5234 struct frame
*frame
;
5236 int unchanged_at_top
, unchanged_at_bottom
;
5239 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5240 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5241 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5242 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5244 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5245 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5246 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5248 if (!current_matrix
)
5251 /* Compute hash codes of all the lines. Also calculate number of
5252 changed lines, number of unchanged lines at the beginning, and
5253 number of unchanged lines at the end. */
5255 unchanged_at_top
= 0;
5256 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5257 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5259 /* Give up on this scrolling if some old lines are not enabled. */
5260 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5262 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5263 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5265 /* This line cannot be redrawn, so don't let scrolling mess it. */
5266 new_hash
[i
] = old_hash
[i
];
5267 #define INFINITY 1000000 /* Taken from scroll.c */
5268 draw_cost
[i
] = INFINITY
;
5272 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5273 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5276 if (old_hash
[i
] != new_hash
[i
])
5279 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5281 else if (i
== unchanged_at_top
)
5283 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5286 /* If changed lines are few, don't allow preemption, don't scroll. */
5287 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5288 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5291 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5292 - unchanged_at_bottom
);
5294 if (scroll_region_ok
)
5295 free_at_end_vpos
-= unchanged_at_bottom
;
5296 else if (memory_below_frame
)
5297 free_at_end_vpos
= -1;
5299 /* If large window, fast terminal and few lines in common between
5300 current frame and desired frame, don't bother with i/d calc. */
5301 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5303 10 * scrolling_max_lines_saved (unchanged_at_top
,
5304 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5305 old_hash
, new_hash
, draw_cost
)))
5308 if (window_size
< 2)
5311 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5312 draw_cost
+ unchanged_at_top
- 1,
5313 old_draw_cost
+ unchanged_at_top
- 1,
5314 old_hash
+ unchanged_at_top
- 1,
5315 new_hash
+ unchanged_at_top
- 1,
5316 free_at_end_vpos
- unchanged_at_top
);
5322 /* Count the number of blanks at the start of the vector of glyphs R
5323 which is LEN glyphs long. */
5326 count_blanks (r
, len
)
5332 for (i
= 0; i
< len
; ++i
)
5333 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5340 /* Count the number of glyphs in common at the start of the glyph
5341 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5342 of STR2. Value is the number of equal glyphs equal at the start. */
5345 count_match (str1
, end1
, str2
, end2
)
5346 struct glyph
*str1
, *end1
, *str2
, *end2
;
5348 struct glyph
*p1
= str1
;
5349 struct glyph
*p2
= str2
;
5353 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5360 /* Char insertion/deletion cost vector, from term.c */
5362 extern int *char_ins_del_vector
;
5363 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5366 /* Perform a frame-based update on line VPOS in frame FRAME. */
5369 update_frame_line (f
, vpos
)
5373 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5375 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5376 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5377 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5378 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5379 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5380 int must_write_whole_line_p
;
5381 int write_spaces_p
= must_write_spaces
;
5382 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5383 != FACE_TTY_DEFAULT_BG_COLOR
);
5385 if (colored_spaces_p
)
5388 /* Current row not enabled means it has unknown contents. We must
5389 write the whole desired line in that case. */
5390 must_write_whole_line_p
= !current_row
->enabled_p
;
5391 if (must_write_whole_line_p
)
5398 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5399 olen
= current_row
->used
[TEXT_AREA
];
5401 /* Ignore trailing spaces, if we can. */
5402 if (!write_spaces_p
)
5403 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5407 current_row
->enabled_p
= 1;
5408 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5410 /* If desired line is empty, just clear the line. */
5411 if (!desired_row
->enabled_p
)
5417 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5418 nlen
= desired_row
->used
[TEXT_AREA
];
5419 nend
= nbody
+ nlen
;
5421 /* If display line has unknown contents, write the whole line. */
5422 if (must_write_whole_line_p
)
5424 /* Ignore spaces at the end, if we can. */
5425 if (!write_spaces_p
)
5426 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5429 /* Write the contents of the desired line. */
5432 cursor_to (vpos
, 0);
5433 write_glyphs (nbody
, nlen
);
5436 /* Don't call clear_end_of_line if we already wrote the whole
5437 line. The cursor will not be at the right margin in that
5438 case but in the line below. */
5439 if (nlen
< FRAME_WINDOW_WIDTH (f
))
5441 cursor_to (vpos
, nlen
);
5442 clear_end_of_line (FRAME_WINDOW_WIDTH (f
));
5445 /* Make sure we are in the right row, otherwise cursor movement
5446 with cmgoto might use `ch' in the wrong row. */
5447 cursor_to (vpos
, 0);
5449 make_current (desired_matrix
, current_matrix
, vpos
);
5453 /* Pretend trailing spaces are not there at all,
5454 unless for one reason or another we must write all spaces. */
5455 if (!write_spaces_p
)
5456 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5459 /* If there's no i/d char, quickly do the best we can without it. */
5460 if (!char_ins_del_ok
)
5464 /* Find the first glyph in desired row that doesn't agree with
5465 a glyph in the current row, and write the rest from there on. */
5466 for (i
= 0; i
< nlen
; i
++)
5468 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5470 /* Find the end of the run of different glyphs. */
5474 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5475 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5478 /* Output this run of non-matching chars. */
5479 cursor_to (vpos
, i
);
5480 write_glyphs (nbody
+ i
, j
- i
);
5483 /* Now find the next non-match. */
5487 /* Clear the rest of the line, or the non-clear part of it. */
5490 cursor_to (vpos
, nlen
);
5491 clear_end_of_line (olen
);
5494 /* Make current row = desired row. */
5495 make_current (desired_matrix
, current_matrix
, vpos
);
5499 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5500 characters in a row. */
5504 /* If current line is blank, skip over initial spaces, if
5505 possible, and write the rest. */
5509 nsp
= count_blanks (nbody
, nlen
);
5513 cursor_to (vpos
, nsp
);
5514 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5517 /* Exchange contents between current_frame and new_frame. */
5518 make_current (desired_matrix
, current_matrix
, vpos
);
5522 /* Compute number of leading blanks in old and new contents. */
5523 osp
= count_blanks (obody
, olen
);
5524 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5526 /* Compute number of matching chars starting with first non-blank. */
5527 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5528 nbody
+ nsp
, nbody
+ nlen
);
5530 /* Spaces in new match implicit space past the end of old. */
5531 /* A bug causing this to be a no-op was fixed in 18.29. */
5532 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5535 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5539 /* Avoid doing insert/delete char
5540 just cause number of leading spaces differs
5541 when the following text does not match. */
5542 if (begmatch
== 0 && osp
!= nsp
)
5543 osp
= nsp
= min (osp
, nsp
);
5545 /* Find matching characters at end of line */
5548 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5550 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5555 endmatch
= obody
+ olen
- op1
;
5557 /* tem gets the distance to insert or delete.
5558 endmatch is how many characters we save by doing so.
5561 tem
= (nlen
- nsp
) - (olen
- osp
);
5563 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5566 /* nsp - osp is the distance to insert or delete.
5567 If that is nonzero, begmatch is known to be nonzero also.
5568 begmatch + endmatch is how much we save by doing the ins/del.
5572 && (!char_ins_del_ok
5573 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5577 osp
= nsp
= min (osp
, nsp
);
5580 /* Now go through the line, inserting, writing and
5581 deleting as appropriate. */
5585 cursor_to (vpos
, nsp
);
5586 delete_glyphs (osp
- nsp
);
5590 /* If going to delete chars later in line
5591 and insert earlier in the line,
5592 must delete first to avoid losing data in the insert */
5593 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5595 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5596 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5597 olen
= nlen
- (nsp
- osp
);
5599 cursor_to (vpos
, osp
);
5600 insert_glyphs (0, nsp
- osp
);
5604 tem
= nsp
+ begmatch
+ endmatch
;
5605 if (nlen
!= tem
|| olen
!= tem
)
5607 if (!endmatch
|| nlen
== olen
)
5609 /* If new text being written reaches right margin, there is
5610 no need to do clear-to-eol at the end of this function
5611 (and it would not be safe, since cursor is not going to
5612 be "at the margin" after the text is done). */
5613 if (nlen
== FRAME_WINDOW_WIDTH (f
))
5616 /* Function write_glyphs is prepared to do nothing
5617 if passed a length <= 0. Check it here to avoid
5618 unnecessary cursor movement. */
5621 cursor_to (vpos
, nsp
+ begmatch
);
5622 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5625 else if (nlen
> olen
)
5627 /* Here, we used to have the following simple code:
5628 ----------------------------------------
5629 write_glyphs (nbody + nsp + begmatch, olen - tem);
5630 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5631 ----------------------------------------
5632 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5633 is a padding glyph. */
5634 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5637 cursor_to (vpos
, nsp
+ begmatch
);
5639 /* Calculate columns we can actually overwrite. */
5640 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5642 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5644 /* If we left columns to be overwritten, we must delete them. */
5645 del
= olen
- tem
- out
;
5647 delete_glyphs (del
);
5649 /* At last, we insert columns not yet written out. */
5650 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5653 else if (olen
> nlen
)
5655 cursor_to (vpos
, nsp
+ begmatch
);
5656 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5657 delete_glyphs (olen
- nlen
);
5663 /* If any unerased characters remain after the new line, erase them. */
5666 cursor_to (vpos
, nlen
);
5667 clear_end_of_line (olen
);
5670 /* Exchange contents between current_frame and new_frame. */
5671 make_current (desired_matrix
, current_matrix
, vpos
);
5676 /***********************************************************************
5677 X/Y Position -> Buffer Position
5678 ***********************************************************************/
5680 /* Determine what's under window-relative pixel position (*X, *Y).
5681 Return in *OBJECT the object (string or buffer) that's there.
5682 Return in *POS the position in that object. Adjust *X and *Y
5683 to character boundaries. */
5686 buffer_posn_from_coords (w
, x
, y
, object
, pos
)
5689 Lisp_Object
*object
;
5690 struct display_pos
*pos
;
5693 struct buffer
*old_current_buffer
= current_buffer
;
5694 struct text_pos startp
;
5695 int left_area_width
;
5697 current_buffer
= XBUFFER (w
->buffer
);
5698 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5699 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5700 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5701 start_display (&it
, w
, startp
);
5703 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5704 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5705 MOVE_TO_X
| MOVE_TO_Y
);
5707 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5709 current_buffer
= old_current_buffer
;
5711 *object
= STRINGP (it
.string
) ? it
.string
: w
->buffer
;
5716 /* Value is the string under window-relative coordinates X/Y in the
5717 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5718 means look at the mode line. *CHARPOS is set to the position in
5719 the string returned. */
5722 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5724 int x
, y
, mode_line_p
;
5727 struct glyph_row
*row
;
5728 struct glyph
*glyph
, *end
;
5729 struct frame
*f
= XFRAME (w
->frame
);
5731 Lisp_Object string
= Qnil
;
5734 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5736 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5738 if (row
->mode_line_p
&& row
->enabled_p
)
5740 /* The mode lines are displayed over scroll bars and bitmap
5741 areas, and X is window-relative. Correct X by the scroll bar
5742 and bitmap area width. */
5743 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5744 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5745 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5747 /* Find the glyph under X. If we find one with a string object,
5748 it's the one we were looking for. */
5749 glyph
= row
->glyphs
[TEXT_AREA
];
5750 end
= glyph
+ row
->used
[TEXT_AREA
];
5751 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5752 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5754 string
= glyph
->object
;
5755 *charpos
= glyph
->charpos
;
5764 /***********************************************************************
5765 Changing Frame Sizes
5766 ***********************************************************************/
5771 window_change_signal (signalnum
) /* If we don't have an argument, */
5772 int signalnum
; /* some compilers complain in signal calls. */
5778 int old_errno
= errno
;
5780 get_frame_size (&width
, &height
);
5782 /* The frame size change obviously applies to a termcap-controlled
5783 frame. Find such a frame in the list, and assume it's the only
5784 one (since the redisplay code always writes to stdout, not a
5785 FILE * specified in the frame structure). Record the new size,
5786 but don't reallocate the data structures now. Let that be done
5787 later outside of the signal handler. */
5790 Lisp_Object tail
, frame
;
5792 FOR_EACH_FRAME (tail
, frame
)
5794 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5796 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5802 signal (SIGWINCH
, window_change_signal
);
5805 #endif /* SIGWINCH */
5808 /* Do any change in frame size that was requested by a signal. SAFE
5809 non-zero means this function is called from a place where it is
5810 safe to change frame sizes while a redisplay is in progress. */
5813 do_pending_window_change (safe
)
5816 /* If window_change_signal should have run before, run it now. */
5817 if (redisplaying_p
&& !safe
)
5820 while (delayed_size_change
)
5822 Lisp_Object tail
, frame
;
5824 delayed_size_change
= 0;
5826 FOR_EACH_FRAME (tail
, frame
)
5828 struct frame
*f
= XFRAME (frame
);
5830 int height
= FRAME_NEW_HEIGHT (f
);
5831 int width
= FRAME_NEW_WIDTH (f
);
5833 if (height
!= 0 || width
!= 0)
5834 change_frame_size (f
, height
, width
, 0, 0, safe
);
5840 /* Change the frame height and/or width. Values may be given as zero to
5841 indicate no change is to take place.
5843 If DELAY is non-zero, then assume we're being called from a signal
5844 handler, and queue the change for later - perhaps the next
5845 redisplay. Since this tries to resize windows, we can't call it
5846 from a signal handler.
5848 SAFE non-zero means this function is called from a place where it's
5849 safe to change frame sizes while a redisplay is in progress. */
5852 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5853 register struct frame
*f
;
5854 int newheight
, newwidth
, pretend
, delay
, safe
;
5856 Lisp_Object tail
, frame
;
5858 if (! FRAME_WINDOW_P (f
))
5860 /* When using termcap, or on MS-DOS, all frames use
5861 the same screen, so a change in size affects all frames. */
5862 FOR_EACH_FRAME (tail
, frame
)
5863 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5864 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5865 pretend
, delay
, safe
);
5868 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5872 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5873 register struct frame
*f
;
5874 int newheight
, newwidth
, pretend
, delay
, safe
;
5876 int new_frame_window_width
;
5877 int count
= specpdl_ptr
- specpdl
;
5879 /* If we can't deal with the change now, queue it for later. */
5880 if (delay
|| (redisplaying_p
&& !safe
))
5882 FRAME_NEW_HEIGHT (f
) = newheight
;
5883 FRAME_NEW_WIDTH (f
) = newwidth
;
5884 delayed_size_change
= 1;
5888 /* This size-change overrides any pending one for this frame. */
5889 FRAME_NEW_HEIGHT (f
) = 0;
5890 FRAME_NEW_WIDTH (f
) = 0;
5892 /* If an argument is zero, set it to the current value. */
5894 newheight
= FRAME_HEIGHT (f
);
5896 newwidth
= FRAME_WIDTH (f
);
5898 /* Compute width of windows in F.
5899 This is the width of the frame without vertical scroll bars. */
5900 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5902 /* Round up to the smallest acceptable size. */
5903 check_frame_size (f
, &newheight
, &newwidth
);
5905 /* If we're not changing the frame size, quit now. */
5906 if (newheight
== FRAME_HEIGHT (f
)
5907 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5913 /* We only can set screen dimensions to certain values supported
5914 by our video hardware. Try to find the smallest size greater
5915 or equal to the requested dimensions. */
5916 dos_set_window_size (&newheight
, &newwidth
);
5919 if (newheight
!= FRAME_HEIGHT (f
))
5921 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5923 /* Frame has both root and mini-buffer. */
5924 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5925 FRAME_TOP_MARGIN (f
));
5926 set_window_height (FRAME_ROOT_WINDOW (f
),
5929 - FRAME_TOP_MARGIN (f
)),
5931 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5933 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5936 /* Frame has just one top-level window. */
5937 set_window_height (FRAME_ROOT_WINDOW (f
),
5938 newheight
- FRAME_TOP_MARGIN (f
), 0);
5940 if (FRAME_TERMCAP_P (f
) && !pretend
)
5941 FrameRows
= newheight
;
5944 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5946 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5947 if (FRAME_HAS_MINIBUF_P (f
))
5948 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5950 if (FRAME_TERMCAP_P (f
) && !pretend
)
5951 FrameCols
= newwidth
;
5953 if (WINDOWP (f
->tool_bar_window
))
5954 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5957 FRAME_HEIGHT (f
) = newheight
;
5958 SET_FRAME_WIDTH (f
, newwidth
);
5961 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5962 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5964 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5966 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5967 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5968 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5969 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5973 SET_FRAME_GARBAGED (f
);
5974 calculate_costs (f
);
5978 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5980 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5981 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5982 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5984 unbind_to (count
, Qnil
);
5989 /***********************************************************************
5990 Terminal Related Lisp Functions
5991 ***********************************************************************/
5993 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5994 1, 1, "FOpen termscript file: ",
5995 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5996 FILE = nil means just close any termscript file currently open. */)
6000 if (termscript
!= 0) fclose (termscript
);
6005 file
= Fexpand_file_name (file
, Qnil
);
6006 termscript
= fopen (XSTRING (file
)->data
, "w");
6007 if (termscript
== 0)
6008 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6014 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6015 Ssend_string_to_terminal
, 1, 1, 0,
6016 doc
: /* Send STRING to the terminal without alteration.
6017 Control characters in STRING will have terminal-dependent effects. */)
6021 /* ??? Perhaps we should do something special for multibyte strings here. */
6022 CHECK_STRING (string
, 0);
6023 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
6027 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
6029 fflush (termscript
);
6035 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6036 doc
: /* Beep, or flash the screen.
6037 Also, unless an argument is given,
6038 terminate any keyboard macro currently executing. */)
6061 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6062 error ("Keyboard macro terminated by a command ringing the bell");
6070 /***********************************************************************
6072 ***********************************************************************/
6074 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6075 doc
: /* Pause, without updating display, for SECONDS seconds.
6076 SECONDS may be a floating-point value, meaning that you can wait for a
6077 fraction of a second. Optional second arg MILLISECONDS specifies an
6078 additional wait period, in milliseconds; this may be useful if your
6079 Emacs was built without floating point support.
6080 \(Not all operating systems support waiting for a fraction of a second.) */)
6081 (seconds
, milliseconds
)
6082 Lisp_Object seconds
, milliseconds
;
6086 if (NILP (milliseconds
))
6087 XSETINT (milliseconds
, 0);
6089 CHECK_NUMBER (milliseconds
, 1);
6090 usec
= XINT (milliseconds
) * 1000;
6093 double duration
= extract_float (seconds
);
6094 sec
= (int) duration
;
6095 usec
+= (duration
- sec
) * 1000000;
6098 #ifndef EMACS_HAS_USECS
6099 if (sec
== 0 && usec
!= 0)
6100 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6103 /* Assure that 0 <= usec < 1000000. */
6106 /* We can't rely on the rounding being correct if user is negative. */
6107 if (-1000000 < usec
)
6108 sec
--, usec
+= 1000000;
6110 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6113 sec
+= usec
/ 1000000, usec
%= 1000000;
6115 if (sec
< 0 || (sec
== 0 && usec
== 0))
6121 XSETFASTINT (zero
, 0);
6122 wait_reading_process_input (sec
, usec
, zero
, 0);
6125 /* We should always have wait_reading_process_input; we have a dummy
6126 implementation for systems which don't support subprocesses. */
6128 /* No wait_reading_process_input */
6135 /* The reason this is done this way
6136 (rather than defined (H_S) && defined (H_T))
6137 is because the VMS preprocessor doesn't grok `defined' */
6139 EMACS_GET_TIME (end_time
);
6140 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6141 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6145 EMACS_GET_TIME (timeout
);
6146 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6147 if (EMACS_TIME_NEG_P (timeout
)
6148 || !select (1, 0, 0, 0, &timeout
))
6151 #else /* not HAVE_SELECT */
6153 #endif /* HAVE_SELECT */
6154 #endif /* not VMS */
6157 #endif /* no subprocesses */
6163 /* This is just like wait_reading_process_input, except that
6164 it does the redisplay.
6166 It's also much like Fsit_for, except that it can be used for
6167 waiting for input as well. */
6170 sit_for (sec
, usec
, reading
, display
, initial_display
)
6171 int sec
, usec
, reading
, display
, initial_display
;
6173 Lisp_Object read_kbd
;
6175 swallow_events (display
);
6177 if (detect_input_pending_run_timers (display
))
6180 if (initial_display
)
6181 redisplay_preserve_echo_area (2);
6183 if (sec
== 0 && usec
== 0)
6190 XSETINT (read_kbd
, reading
? -1 : 1);
6191 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6193 return detect_input_pending () ? Qnil
: Qt
;
6197 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6198 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6199 SECONDS may be a floating-point value, meaning that you can wait for a
6200 fraction of a second. Optional second arg MILLISECONDS specifies an
6201 additional wait period, in milliseconds; this may be useful if your
6202 Emacs was built without floating point support.
6203 \(Not all operating systems support waiting for a fraction of a second.)
6204 Optional third arg NODISP non-nil means don't redisplay, just wait for input.
6205 Redisplay is preempted as always if input arrives, and does not happen
6206 if input is available before it starts.
6207 Value is t if waited the full time with no input arriving. */)
6208 (seconds
, milliseconds
, nodisp
)
6209 Lisp_Object seconds
, milliseconds
, nodisp
;
6213 if (NILP (milliseconds
))
6214 XSETINT (milliseconds
, 0);
6216 CHECK_NUMBER (milliseconds
, 1);
6217 usec
= XINT (milliseconds
) * 1000;
6220 double duration
= extract_float (seconds
);
6221 sec
= (int) duration
;
6222 usec
+= (duration
- sec
) * 1000000;
6225 #ifndef EMACS_HAS_USECS
6226 if (usec
!= 0 && sec
== 0)
6227 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6230 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6235 /***********************************************************************
6236 Other Lisp Functions
6237 ***********************************************************************/
6239 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6240 session's frames, frame names, buffers, buffer-read-only flags, and
6241 buffer-modified-flags, and a trailing sentinel (so we don't need to
6242 add length checks). */
6244 static Lisp_Object frame_and_buffer_state
;
6247 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6248 Sframe_or_buffer_changed_p
, 0, 0, 0,
6249 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6250 The state variable is an internal vector containing all frames and buffers,
6251 aside from buffers whose names start with space,
6252 along with the buffers' read-only and modified flags, which allows a fast
6253 check to see whether the menu bars might need to be recomputed.
6254 If this function returns non-nil, it updates the internal vector to reflect
6255 the current state. */)
6258 Lisp_Object tail
, frame
, buf
;
6262 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6263 FOR_EACH_FRAME (tail
, frame
)
6265 if (!EQ (*vecp
++, frame
))
6267 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6270 /* Check that the buffer info matches.
6271 No need to test for the end of the vector
6272 because the last element of the vector is lambda
6273 and that will always cause a mismatch. */
6274 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6276 buf
= XCDR (XCAR (tail
));
6277 /* Ignore buffers that aren't included in buffer lists. */
6278 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6280 if (!EQ (*vecp
++, buf
))
6282 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6284 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6287 /* Detect deletion of a buffer at the end of the list. */
6288 if (EQ (*vecp
, Qlambda
))
6291 /* Start with 1 so there is room for at least one lambda at the end. */
6293 FOR_EACH_FRAME (tail
, frame
)
6295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6297 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6298 if (n
> XVECTOR (frame_and_buffer_state
)->size
6299 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6300 /* Add 20 extra so we grow it less often. */
6301 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6302 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6303 FOR_EACH_FRAME (tail
, frame
)
6306 *vecp
++ = XFRAME (frame
)->name
;
6308 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6310 buf
= XCDR (XCAR (tail
));
6311 /* Ignore buffers that aren't included in buffer lists. */
6312 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6315 *vecp
++ = XBUFFER (buf
)->read_only
;
6316 *vecp
++ = Fbuffer_modified_p (buf
);
6318 /* Fill up the vector with lambdas (always at least one). */
6320 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6321 < XVECTOR (frame_and_buffer_state
)->size
)
6323 /* Make sure we didn't overflow the vector. */
6324 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6325 > XVECTOR (frame_and_buffer_state
)->size
)
6332 /***********************************************************************
6334 ***********************************************************************/
6336 char *terminal_type
;
6338 /* Initialization done when Emacs fork is started, before doing stty.
6339 Determine terminal type and set terminal_driver. Then invoke its
6340 decoding routine to set up variables in the terminal package. */
6345 #ifdef HAVE_X_WINDOWS
6346 extern int display_arg
;
6349 /* Construct the space glyph. */
6350 space_glyph
.type
= CHAR_GLYPH
;
6351 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6352 space_glyph
.charpos
= -1;
6356 cursor_in_echo_area
= 0;
6357 terminal_type
= (char *) 0;
6359 /* Now is the time to initialize this; it's used by init_sys_modes
6361 Vwindow_system
= Qnil
;
6363 /* If the user wants to use a window system, we shouldn't bother
6364 initializing the terminal. This is especially important when the
6365 terminal is so dumb that emacs gives up before and doesn't bother
6366 using the window system.
6368 If the DISPLAY environment variable is set and nonempty,
6369 try to use X, and die with an error message if that doesn't work. */
6371 #ifdef HAVE_X_WINDOWS
6376 display
= getenv ("DECW$DISPLAY");
6378 display
= getenv ("DISPLAY");
6381 display_arg
= (display
!= 0 && *display
!= 0);
6384 if (!inhibit_window_system
&& display_arg
6390 Vwindow_system
= intern ("x");
6392 Vwindow_system_version
= make_number (11);
6394 Vwindow_system_version
= make_number (10);
6396 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6397 /* In some versions of ncurses,
6398 tputs crashes if we have not called tgetent.
6400 { char b
[2044]; tgetent (b
, "xterm");}
6402 adjust_frame_glyphs_initially ();
6405 #endif /* HAVE_X_WINDOWS */
6408 if (!inhibit_window_system
)
6410 Vwindow_system
= intern ("w32");
6411 Vwindow_system_version
= make_number (1);
6412 adjust_frame_glyphs_initially ();
6415 #endif /* HAVE_NTGUI */
6418 if (!inhibit_window_system
)
6420 Vwindow_system
= intern ("mac");
6421 Vwindow_system_version
= make_number (1);
6422 adjust_frame_glyphs_initially ();
6425 #endif /* macintosh */
6427 /* If no window system has been specified, try to use the terminal. */
6430 fatal ("standard input is not a tty");
6434 /* Look at the TERM variable */
6435 terminal_type
= (char *) getenv ("TERM");
6439 fprintf (stderr
, "Please specify your terminal type.\n\
6440 For types defined in VMS, use set term /device=TYPE.\n\
6441 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6442 \(The quotation marks are necessary since terminal types are lower case.)\n");
6444 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6450 /* VMS DCL tends to up-case things, so down-case term type.
6451 Hardly any uppercase letters in terminal types; should be none. */
6453 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6456 strcpy (new, terminal_type
);
6458 for (p
= new; *p
; p
++)
6462 terminal_type
= new;
6466 term_init (terminal_type
);
6469 struct frame
*sf
= SELECTED_FRAME ();
6470 int width
= FRAME_WINDOW_WIDTH (sf
);
6471 int height
= FRAME_HEIGHT (sf
);
6473 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6475 /* If these sizes are so big they cause overflow, just ignore the
6476 change. It's not clear what better we could do. */
6477 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6478 fatal ("screen size %dx%d too big", width
, height
);
6481 adjust_frame_glyphs_initially ();
6482 calculate_costs (XFRAME (selected_frame
));
6487 #endif /* CANNOT_DUMP */
6488 signal (SIGWINCH
, window_change_signal
);
6489 #endif /* SIGWINCH */
6491 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6495 /* The MSDOS terminal turns on its ``window system'' relatively
6496 late into the startup, so we cannot do the frame faces'
6497 initialization just yet. It will be done later by pc-win.el
6498 and internal_terminal_init. */
6499 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6501 && NILP (Vwindow_system
))
6503 /* For the initial frame, we don't have any way of knowing what
6504 are the foreground and background colors of the terminal. */
6505 struct frame
*sf
= SELECTED_FRAME();
6507 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6508 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6509 call0 (intern ("tty-set-up-initial-frame-faces"));
6515 /***********************************************************************
6517 ***********************************************************************/
6519 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6520 Sinternal_show_cursor
, 2, 2, 0,
6521 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6522 WINDOW nil means use the selected window. SHOW non-nil means
6523 show a cursor in WINDOW in the next redisplay. SHOW nil means
6524 don't show a cursor. */)
6526 Lisp_Object window
, show
;
6528 /* Don't change cursor state while redisplaying. This could confuse
6530 if (!redisplaying_p
)
6533 window
= selected_window
;
6535 CHECK_WINDOW (window
, 2);
6537 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6544 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6545 Sinternal_show_cursor_p
, 0, 1, 0,
6546 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6547 WINDOW nil or omitted means report on the selected window. */)
6554 window
= selected_window
;
6556 CHECK_WINDOW (window
, 2);
6558 w
= XWINDOW (window
);
6559 return w
->cursor_off_p
? Qnil
: Qt
;
6563 /***********************************************************************
6565 ***********************************************************************/
6570 defsubr (&Sredraw_frame
);
6571 defsubr (&Sredraw_display
);
6572 defsubr (&Sframe_or_buffer_changed_p
);
6573 defsubr (&Sopen_termscript
);
6575 defsubr (&Ssit_for
);
6576 defsubr (&Ssleep_for
);
6577 defsubr (&Ssend_string_to_terminal
);
6578 defsubr (&Sinternal_show_cursor
);
6579 defsubr (&Sinternal_show_cursor_p
);
6582 defsubr (&Sdump_redisplay_history
);
6585 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6586 staticpro (&frame_and_buffer_state
);
6588 Qdisplay_table
= intern ("display-table");
6589 staticpro (&Qdisplay_table
);
6590 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6591 staticpro (&Qredisplay_dont_pause
);
6593 DEFVAR_INT ("baud-rate", &baud_rate
,
6594 doc
: /* *The output baud rate of the terminal.
6595 On most systems, changing this value will affect the amount of padding
6596 and the other strategic decisions made during redisplay. */);
6598 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6599 doc
: /* *Non-nil means invert the entire frame display.
6600 This means everything is in inverse video which otherwise would not be. */);
6602 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6603 doc
: /* *Non-nil means try to flash the frame to represent a bell. */);
6605 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6606 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6607 A non-nil value is useful if the terminal can automatically preserve
6608 Emacs's frame display when you reenter Emacs.
6609 It is up to you to set this variable if your terminal can do that. */);
6611 DEFVAR_LISP ("window-system", &Vwindow_system
,
6612 doc
: /* A symbol naming the window-system under which Emacs is running
6613 \(such as `x'), or nil if emacs is running on an ordinary terminal. */);
6615 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6616 doc
: /* The version number of the window system in use.
6617 For X windows, this is 10 or 11. */);
6619 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6620 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6622 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6623 doc
: /* Table defining how to output a glyph code to the frame.
6624 If not nil, this is a vector indexed by glyph code to define the glyph.
6625 Each element can be:
6626 integer: a glyph code which this glyph is an alias for.
6627 string: output this glyph using that string (not impl. in X windows).
6628 nil: this glyph mod 524288 is the code of a character to output,
6629 and this glyph / 524288 is the face number (see `face-id') to use
6630 while outputting it. */);
6631 Vglyph_table
= Qnil
;
6633 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6634 doc
: /* Display table to use for buffers that specify none.
6635 See `buffer-display-table' for more information. */);
6636 Vstandard_display_table
= Qnil
;
6638 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6639 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6640 redisplay_dont_pause
= 0;
6642 /* Initialize `window-system', unless init_display already decided it. */
6647 Vwindow_system
= Qnil
;
6648 Vwindow_system_version
= Qnil
;