1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
65 #endif /* macintosh */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define min(a, b) ((a) < (b) ? (a) : (b))
81 /* Get number of chars of output now in the buffer of a stdio stream.
82 This ought to be built in in stdio, but it isn't. Some s- files
83 override this because their stdio internals differ. */
85 #ifdef __GNU_LIBRARY__
87 /* The s- file might have overridden the definition with one that
88 works for the system's C library. But we are using the GNU C
89 library, so this is the right definition for every system. */
91 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
94 #undef PENDING_OUTPUT_COUNT
95 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
97 #else /* not __GNU_LIBRARY__ */
98 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
99 #include <stdio_ext.h>
100 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
102 #ifndef PENDING_OUTPUT_COUNT
103 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
105 #endif /* not __GNU_LIBRARY__ */
107 #if defined(HAVE_TERM_H) && defined (LINUX) && defined (HAVE_LIBNCURSES)
108 #include <term.h> /* for tgetent */
111 /* Structure to pass dimensions around. Used for character bounding
112 boxes, glyph matrix dimensions and alike. */
121 /* Function prototypes. */
123 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
124 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
125 static void fake_current_matrices
P_ ((Lisp_Object
));
126 static void redraw_overlapping_rows
P_ ((struct window
*, int));
127 static void redraw_overlapped_rows
P_ ((struct window
*, int));
128 static int count_blanks
P_ ((struct glyph
*, int));
129 static int count_match
P_ ((struct glyph
*, struct glyph
*,
130 struct glyph
*, struct glyph
*));
131 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
132 static void update_frame_line
P_ ((struct frame
*, int));
133 static struct dim allocate_matrices_for_frame_redisplay
134 P_ ((Lisp_Object
, int, int, struct dim
, int, int *));
135 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*,
137 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
138 static void adjust_frame_glyphs
P_ ((struct frame
*));
139 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
140 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
141 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
142 int, int, struct dim
));
143 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
144 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
146 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
148 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
149 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
151 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
153 static struct glyph_pool
*new_glyph_pool
P_ ((void));
154 static void free_glyph_pool
P_ ((struct glyph_pool
*));
155 static void adjust_frame_glyphs_initially
P_ ((void));
156 static void adjust_frame_message_buffer
P_ ((struct frame
*));
157 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
158 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
159 static void build_frame_matrix
P_ ((struct frame
*));
160 void clear_current_matrices
P_ ((struct frame
*));
161 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
163 static void clear_window_matrices
P_ ((struct window
*, int));
164 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
165 static int scrolling_window
P_ ((struct window
*, int));
166 static int update_window_line
P_ ((struct window
*, int, int *));
167 static void update_marginal_area
P_ ((struct window
*, int, int));
168 static int update_text_area
P_ ((struct window
*, int));
169 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
171 static void mirror_make_current
P_ ((struct window
*, int));
172 void check_window_matrix_pointers
P_ ((struct window
*));
174 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
175 struct glyph_matrix
*));
177 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
178 static int update_window_tree
P_ ((struct window
*, int));
179 static int update_window
P_ ((struct window
*, int));
180 static int update_frame_1
P_ ((struct frame
*, int, int));
181 static void set_window_cursor_after_update
P_ ((struct window
*));
182 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
183 struct glyph_row
*, int));
184 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
185 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
186 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
187 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
188 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
189 struct window
*frame_row_to_window
P_ ((struct window
*, int));
192 /* Non-zero means don't pause redisplay for pending input. (This is
193 for debugging and for a future implementation of EDT-like
196 int redisplay_dont_pause
;
198 /* Nonzero upon entry to redisplay means do not assume anything about
199 current contents of actual terminal frame; clear and redraw it. */
203 /* Nonzero means last display completed. Zero means it was preempted. */
205 int display_completed
;
207 /* Lisp variable visible-bell; enables use of screen-flash instead of
212 /* Invert the color of the whole frame, at a low level. */
216 /* Line speed of the terminal. */
220 /* Either nil or a symbol naming the window system under which Emacs
223 Lisp_Object Vwindow_system
;
225 /* Version number of X windows: 10, 11 or nil. */
227 Lisp_Object Vwindow_system_version
;
229 /* Vector of glyph definitions. Indexed by glyph number, the contents
230 are a string which is how to output the glyph.
232 If Vglyph_table is nil, a glyph is output by using its low 8 bits
235 This is an obsolete feature that is no longer used. The variable
236 is retained for compatibility. */
238 Lisp_Object Vglyph_table
;
240 /* Display table to use for vectors that don't specify their own. */
242 Lisp_Object Vstandard_display_table
;
244 /* Nonzero means reading single-character input with prompt so put
245 cursor on mini-buffer after the prompt. positive means at end of
246 text in echo area; negative means at beginning of line. */
248 int cursor_in_echo_area
;
250 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
253 /* The currently selected frame. In a single-frame version, this
254 variable always equals the_only_frame. */
256 Lisp_Object selected_frame
;
258 /* A frame which is not just a mini-buffer, or 0 if there are no such
259 frames. This is usually the most recent such frame that was
260 selected. In a single-frame version, this variable always holds
261 the address of the_only_frame. */
263 struct frame
*last_nonminibuf_frame
;
265 /* Stdio stream being used for copy of all output. */
269 /* Structure for info on cursor positioning. */
273 /* 1 means SIGWINCH happened when not safe. */
275 int delayed_size_change
;
277 /* 1 means glyph initialization has been completed at startup. */
279 static int glyphs_initialized_initially_p
;
281 /* Updated window if != 0. Set by update_window. */
283 struct window
*updated_window
;
285 /* Glyph row updated in update_window_line, and area that is updated. */
287 struct glyph_row
*updated_row
;
290 /* A glyph for a space. */
292 struct glyph space_glyph
;
294 /* Non-zero means update has been performed directly, so that there's
295 no need for redisplay_internal to do much work. Set by
296 direct_output_for_insert. */
298 int redisplay_performed_directly_p
;
300 /* Counts of allocated structures. These counts serve to diagnose
301 memory leaks and double frees. */
303 int glyph_matrix_count
;
304 int glyph_pool_count
;
306 /* If non-null, the frame whose frame matrices are manipulated. If
307 null, window matrices are worked on. */
309 static struct frame
*frame_matrix_frame
;
311 /* Current interface for window-based redisplay. Set from init_xterm.
312 A null value means we are not using window-based redisplay. */
314 struct redisplay_interface
*rif
;
316 /* Non-zero means that fonts have been loaded since the last glyph
317 matrix adjustments. Redisplay must stop, and glyph matrices must
318 be adjusted when this flag becomes non-zero during display. The
319 reason fonts can be loaded so late is that fonts of fontsets are
324 /* Convert vpos and hpos from frame to window and vice versa.
325 This may only be used for terminal frames. */
329 static int window_to_frame_vpos
P_ ((struct window
*, int));
330 static int window_to_frame_hpos
P_ ((struct window
*, int));
331 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
332 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
334 /* One element of the ring buffer containing redisplay history
337 struct redisplay_history
339 char trace
[512 + 100];
342 /* The size of the history buffer. */
344 #define REDISPLAY_HISTORY_SIZE 30
346 /* The redisplay history buffer. */
348 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
350 /* Next free entry in redisplay_history. */
352 static int history_idx
;
354 /* A tick that's incremented each time something is added to the
357 static unsigned history_tick
;
359 static void add_frame_display_history
P_ ((struct frame
*, int));
360 static void add_window_display_history
P_ ((struct window
*, char *, int));
363 /* Add to the redisplay history how window W has been displayed.
364 MSG is a trace containing the information how W's glyph matrix
365 has been contructed. PAUSED_P non-zero means that the update
366 has been interrupted for pending input. */
369 add_window_display_history (w
, msg
, paused_p
)
376 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
378 buf
= redisplay_history
[history_idx
].trace
;
381 sprintf (buf
, "%d: window %p (`%s')%s\n",
384 ((BUFFERP (w
->buffer
)
385 && STRINGP (XBUFFER (w
->buffer
)->name
))
386 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
388 paused_p
? " ***paused***" : "");
393 /* Add to the redisplay history that frame F has been displayed.
394 PAUSED_P non-zero means that the update has been interrupted for
398 add_frame_display_history (f
, paused_p
)
404 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
406 buf
= redisplay_history
[history_idx
].trace
;
409 sprintf (buf
, "%d: update frame %p%s",
411 f
, paused_p
? " ***paused***" : "");
415 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
416 Sdump_redisplay_history
, 0, 0, "",
417 "Dump redisplay history to stderr.")
422 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
425 i
= REDISPLAY_HISTORY_SIZE
- 1;
426 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
433 #else /* GLYPH_DEBUG == 0 */
435 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + XFASTINT ((W)->top))
436 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + XFASTINT ((W)->left))
438 #endif /* GLYPH_DEBUG == 0 */
441 /* Like bcopy except never gets confused by overlap. Let this be the
442 first function defined in this file, or change emacs.c where the
443 address of this function is used. */
446 safe_bcopy (from
, to
, size
)
450 if (size
<= 0 || from
== to
)
453 /* If the source and destination don't overlap, then bcopy can
454 handle it. If they do overlap, but the destination is lower in
455 memory than the source, we'll assume bcopy can handle that. */
456 if (to
< from
|| from
+ size
<= to
)
457 bcopy (from
, to
, size
);
459 /* Otherwise, we'll copy from the end. */
462 register char *endf
= from
+ size
;
463 register char *endt
= to
+ size
;
465 /* If TO - FROM is large, then we should break the copy into
466 nonoverlapping chunks of TO - FROM bytes each. However, if
467 TO - FROM is small, then the bcopy function call overhead
468 makes this not worth it. The crossover point could be about
469 anywhere. Since I don't think the obvious copy loop is too
470 bad, I'm trying to err in its favor. */
475 while (endf
!= from
);
487 bcopy (endf
, endt
, to
- from
);
490 /* If SIZE wasn't a multiple of TO - FROM, there will be a
491 little left over. The amount left over is (endt + (to -
492 from)) - to, which is endt - from. */
493 bcopy (from
, to
, endt
- from
);
500 /***********************************************************************
502 ***********************************************************************/
504 /* Allocate and return a glyph_matrix structure. POOL is the glyph
505 pool from which memory for the matrix should be allocated, or null
506 for window-based redisplay where no glyph pools are used. The
507 member `pool' of the glyph matrix structure returned is set to
508 POOL, the structure is otherwise zeroed. */
510 struct glyph_matrix
*
511 new_glyph_matrix (pool
)
512 struct glyph_pool
*pool
;
514 struct glyph_matrix
*result
;
516 /* Allocate and clear. */
517 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
518 bzero (result
, sizeof *result
);
520 /* Increment number of allocated matrices. This count is used
521 to detect memory leaks. */
522 ++glyph_matrix_count
;
524 /* Set pool and return. */
530 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
532 The global counter glyph_matrix_count is decremented when a matrix
533 is freed. If the count gets negative, more structures were freed
534 than allocated, i.e. one matrix was freed more than once or a bogus
535 pointer was passed to this function.
537 If MATRIX->pool is null, this means that the matrix manages its own
538 glyph memory---this is done for matrices on X frames. Freeing the
539 matrix also frees the glyph memory in this case. */
542 free_glyph_matrix (matrix
)
543 struct glyph_matrix
*matrix
;
549 /* Detect the case that more matrices are freed than were
551 if (--glyph_matrix_count
< 0)
554 /* Free glyph memory if MATRIX owns it. */
555 if (matrix
->pool
== NULL
)
556 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
557 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
559 /* Free row structures and the matrix itself. */
560 xfree (matrix
->rows
);
566 /* Return the number of glyphs to reserve for a marginal area of
567 window W. TOTAL_GLYPHS is the number of glyphs in a complete
568 display line of window W. MARGIN gives the width of the marginal
569 area in canonical character units. MARGIN should be an integer
573 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
580 if (NUMBERP (margin
))
582 int width
= XFASTINT (w
->width
);
583 double d
= max (0, XFLOATINT (margin
));
584 d
= min (width
/ 2 - 1, d
);
585 n
= (int) ((double) total_glyphs
/ width
* d
);
594 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
597 W is null if the function is called for a frame glyph matrix.
598 Otherwise it is the window MATRIX is a member of. X and Y are the
599 indices of the first column and row of MATRIX within the frame
600 matrix, if such a matrix exists. They are zero for purely
601 window-based redisplay. DIM is the needed size of the matrix.
603 In window-based redisplay, where no frame matrices exist, glyph
604 matrices manage their own glyph storage. Otherwise, they allocate
605 storage from a common frame glyph pool which can be found in
608 The reason for this memory management strategy is to avoid complete
609 frame redraws if possible. When we allocate from a common pool, a
610 change of the location or size of a sub-matrix within the pool
611 requires a complete redisplay of the frame because we cannot easily
612 make sure that the current matrices of all windows still agree with
613 what is displayed on the screen. While this is usually fast, it
614 leads to screen flickering. */
617 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
619 struct glyph_matrix
*matrix
;
625 int marginal_areas_changed_p
= 0;
626 int header_line_changed_p
= 0;
627 int header_line_p
= 0;
628 int left
= -1, right
= -1;
629 int window_x
, window_y
, window_width
= -1, window_height
;
631 /* See if W had a top line that has disappeared now, or vice versa. */
634 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
635 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
637 matrix
->header_line_p
= header_line_p
;
639 /* Do nothing if MATRIX' size, position, vscroll, and marginal areas
640 haven't changed. This optimization is important because preserving
641 the matrix means preventing redisplay. */
642 if (matrix
->pool
== NULL
)
644 window_box (w
, -1, &window_x
, &window_y
, &window_width
, &window_height
);
645 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_width
);
646 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_width
);
647 xassert (left
>= 0 && right
>= 0);
648 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
649 || right
!= matrix
->right_margin_glyphs
);
651 if (!marginal_areas_changed_p
653 && !header_line_changed_p
654 && matrix
->window_left_x
== XFASTINT (w
->left
)
655 && matrix
->window_top_y
== XFASTINT (w
->top
)
656 && matrix
->window_height
== window_height
657 && matrix
->window_vscroll
== w
->vscroll
658 && matrix
->window_width
== window_width
)
662 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
663 if (matrix
->rows_allocated
< dim
.height
)
665 int size
= dim
.height
* sizeof (struct glyph_row
);
666 new_rows
= dim
.height
- matrix
->rows_allocated
;
667 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
668 bzero (matrix
->rows
+ matrix
->rows_allocated
,
669 new_rows
* sizeof *matrix
->rows
);
670 matrix
->rows_allocated
= dim
.height
;
675 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
676 on a frame not using window-based redisplay. Set up pointers for
677 each row into the glyph pool. */
680 xassert (matrix
->pool
->glyphs
);
684 left
= margin_glyphs_to_reserve (w
, dim
.width
,
685 w
->left_margin_width
);
686 right
= margin_glyphs_to_reserve (w
, dim
.width
,
687 w
->right_margin_width
);
692 for (i
= 0; i
< dim
.height
; ++i
)
694 struct glyph_row
*row
= &matrix
->rows
[i
];
696 row
->glyphs
[LEFT_MARGIN_AREA
]
697 = (matrix
->pool
->glyphs
698 + (y
+ i
) * matrix
->pool
->ncolumns
702 || row
== matrix
->rows
+ dim
.height
- 1
703 || (row
== matrix
->rows
&& matrix
->header_line_p
))
705 row
->glyphs
[TEXT_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
];
707 row
->glyphs
[RIGHT_MARGIN_AREA
]
708 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
709 row
->glyphs
[LAST_AREA
]
710 = row
->glyphs
[RIGHT_MARGIN_AREA
];
714 row
->glyphs
[TEXT_AREA
]
715 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
716 row
->glyphs
[RIGHT_MARGIN_AREA
]
717 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
718 row
->glyphs
[LAST_AREA
]
719 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
723 matrix
->left_margin_glyphs
= left
;
724 matrix
->right_margin_glyphs
= right
;
728 /* If MATRIX->pool is null, MATRIX is responsible for managing
729 its own memory. Allocate glyph memory from the heap. */
730 if (dim
.width
> matrix
->matrix_w
732 || header_line_changed_p
733 || marginal_areas_changed_p
)
735 struct glyph_row
*row
= matrix
->rows
;
736 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
740 row
->glyphs
[LEFT_MARGIN_AREA
]
741 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
743 * sizeof (struct glyph
)));
745 /* The mode line never has marginal areas. */
746 if (row
== matrix
->rows
+ dim
.height
- 1
747 || (row
== matrix
->rows
&& matrix
->header_line_p
))
749 row
->glyphs
[TEXT_AREA
]
750 = row
->glyphs
[LEFT_MARGIN_AREA
];
751 row
->glyphs
[RIGHT_MARGIN_AREA
]
752 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
753 row
->glyphs
[LAST_AREA
]
754 = row
->glyphs
[RIGHT_MARGIN_AREA
];
758 row
->glyphs
[TEXT_AREA
]
759 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
760 row
->glyphs
[RIGHT_MARGIN_AREA
]
761 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
762 row
->glyphs
[LAST_AREA
]
763 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
769 xassert (left
>= 0 && right
>= 0);
770 matrix
->left_margin_glyphs
= left
;
771 matrix
->right_margin_glyphs
= right
;
774 /* Number of rows to be used by MATRIX. */
775 matrix
->nrows
= dim
.height
;
776 xassert (matrix
->nrows
>= 0);
780 if (matrix
== w
->current_matrix
)
782 /* Mark rows in a current matrix of a window as not having
783 valid contents. It's important to not do this for
784 desired matrices. When Emacs starts, it may already be
785 building desired matrices when this function runs. */
786 if (window_width
< 0)
787 window_width
= window_box_width (w
, -1);
789 /* Optimize the case that only the height has changed (C-x 2,
790 upper window). Invalidate all rows that are no longer part
792 if (!marginal_areas_changed_p
793 && !header_line_changed_p
795 && dim
.width
== matrix
->matrix_w
796 && matrix
->window_left_x
== XFASTINT (w
->left
)
797 && matrix
->window_top_y
== XFASTINT (w
->top
)
798 && matrix
->window_width
== window_width
)
800 /* Find the last row in the window. */
801 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
802 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
804 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
810 /* Window end is invalid, if inside of the rows that
811 are invalidated below. */
812 if (INTEGERP (w
->window_end_vpos
)
813 && XFASTINT (w
->window_end_vpos
) >= i
)
814 w
->window_end_valid
= Qnil
;
816 while (i
< matrix
->nrows
)
817 matrix
->rows
[i
++].enabled_p
= 0;
821 for (i
= 0; i
< matrix
->nrows
; ++i
)
822 matrix
->rows
[i
].enabled_p
= 0;
825 else if (matrix
== w
->desired_matrix
)
827 /* Rows in desired matrices always have to be cleared;
828 redisplay expects this is the case when it runs, so it
829 had better be the case when we adjust matrices between
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
837 /* Remember last values to be able to optimize frame redraws. */
838 matrix
->matrix_x
= x
;
839 matrix
->matrix_y
= y
;
840 matrix
->matrix_w
= dim
.width
;
841 matrix
->matrix_h
= dim
.height
;
843 /* Record the top y location and height of W at the time the matrix
844 was last adjusted. This is used to optimize redisplay above. */
847 matrix
->window_left_x
= XFASTINT (w
->left
);
848 matrix
->window_top_y
= XFASTINT (w
->top
);
849 matrix
->window_height
= window_height
;
850 matrix
->window_width
= window_width
;
851 matrix
->window_vscroll
= w
->vscroll
;
856 /* Reverse the contents of rows in MATRIX between START and END. The
857 contents of the row at END - 1 end up at START, END - 2 at START +
858 1 etc. This is part of the implementation of rotate_matrix (see
862 reverse_rows (matrix
, start
, end
)
863 struct glyph_matrix
*matrix
;
868 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
870 /* Non-ISO HP/UX compiler doesn't like auto struct
872 struct glyph_row temp
;
873 temp
= matrix
->rows
[i
];
874 matrix
->rows
[i
] = matrix
->rows
[j
];
875 matrix
->rows
[j
] = temp
;
880 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
881 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
882 indices. (Note: this does not copy glyphs, only glyph pointers in
883 row structures are moved around).
885 The algorithm used for rotating the vector was, I believe, first
886 described by Kernighan. See the vector R as consisting of two
887 sub-vectors AB, where A has length BY for BY >= 0. The result
888 after rotating is then BA. Reverse both sub-vectors to get ArBr
889 and reverse the result to get (ArBr)r which is BA. Similar for
893 rotate_matrix (matrix
, first
, last
, by
)
894 struct glyph_matrix
*matrix
;
899 /* Up (rotate left, i.e. towards lower indices). */
901 reverse_rows (matrix
, first
, first
+ by
);
902 reverse_rows (matrix
, first
+ by
, last
);
903 reverse_rows (matrix
, first
, last
);
907 /* Down (rotate right, i.e. towards higher indices). */
908 reverse_rows (matrix
, last
- by
, last
);
909 reverse_rows (matrix
, first
, last
- by
);
910 reverse_rows (matrix
, first
, last
);
915 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
916 with indices START <= index < END. Increment positions by DELTA/
920 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
921 struct glyph_matrix
*matrix
;
922 int start
, end
, delta
, delta_bytes
;
924 /* Check that START and END are reasonable values. */
925 xassert (start
>= 0 && start
<= matrix
->nrows
);
926 xassert (end
>= 0 && end
<= matrix
->nrows
);
927 xassert (start
<= end
);
929 for (; start
< end
; ++start
)
930 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
934 /* Enable a range of rows in glyph matrix MATRIX. START and END are
935 the row indices of the first and last + 1 row to enable. If
936 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
939 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
940 struct glyph_matrix
*matrix
;
944 xassert (start
<= end
);
945 xassert (start
>= 0 && start
< matrix
->nrows
);
946 xassert (end
>= 0 && end
<= matrix
->nrows
);
948 for (; start
< end
; ++start
)
949 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
955 This empties all rows in MATRIX by setting the enabled_p flag for
956 all rows of the matrix to zero. The function prepare_desired_row
957 will eventually really clear a row when it sees one with a zero
960 Resets update hints to defaults value. The only update hint
961 currently present is the flag MATRIX->no_scrolling_p. */
964 clear_glyph_matrix (matrix
)
965 struct glyph_matrix
*matrix
;
969 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
970 matrix
->no_scrolling_p
= 0;
975 /* Shift part of the glyph matrix MATRIX of window W up or down.
976 Increment y-positions in glyph rows between START and END by DY,
977 and recompute their visible height. */
980 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
982 struct glyph_matrix
*matrix
;
987 xassert (start
<= end
);
988 xassert (start
>= 0 && start
< matrix
->nrows
);
989 xassert (end
>= 0 && end
<= matrix
->nrows
);
991 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
992 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
994 for (; start
< end
; ++start
)
996 struct glyph_row
*row
= &matrix
->rows
[start
];
999 row
->visible_height
= row
->height
;
1002 row
->visible_height
-= min_y
- row
->y
;
1003 if (row
->y
+ row
->height
> max_y
)
1004 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1009 /* Mark all rows in current matrices of frame F as invalid. Marking
1010 invalid is done by setting enabled_p to zero for all rows in a
1014 clear_current_matrices (f
)
1015 register struct frame
*f
;
1017 /* Clear frame current matrix, if we have one. */
1018 if (f
->current_matrix
)
1019 clear_glyph_matrix (f
->current_matrix
);
1021 /* Clear the matrix of the menu bar window, if such a window exists.
1022 The menu bar window is currently used to display menus on X when
1023 no toolkit support is compiled in. */
1024 if (WINDOWP (f
->menu_bar_window
))
1025 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1027 /* Clear the matrix of the tool-bar window, if any. */
1028 if (WINDOWP (f
->tool_bar_window
))
1029 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1031 /* Clear current window matrices. */
1032 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1033 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1037 /* Clear out all display lines of F for a coming redisplay. */
1040 clear_desired_matrices (f
)
1041 register struct frame
*f
;
1043 if (f
->desired_matrix
)
1044 clear_glyph_matrix (f
->desired_matrix
);
1046 if (WINDOWP (f
->menu_bar_window
))
1047 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1049 if (WINDOWP (f
->tool_bar_window
))
1050 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1052 /* Do it for window matrices. */
1053 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1054 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1058 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1059 non-zero clear desired matrices, otherwise clear current matrices. */
1062 clear_window_matrices (w
, desired_p
)
1068 if (!NILP (w
->hchild
))
1070 xassert (WINDOWP (w
->hchild
));
1071 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1073 else if (!NILP (w
->vchild
))
1075 xassert (WINDOWP (w
->vchild
));
1076 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1081 clear_glyph_matrix (w
->desired_matrix
);
1084 clear_glyph_matrix (w
->current_matrix
);
1085 w
->window_end_valid
= Qnil
;
1089 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1095 /***********************************************************************
1098 See dispextern.h for an overall explanation of glyph rows.
1099 ***********************************************************************/
1101 /* Clear glyph row ROW. Do it in a way that makes it robust against
1102 changes in the glyph_row structure, i.e. addition or removal of
1103 structure members. */
1105 static struct glyph_row null_row
;
1108 clear_glyph_row (row
)
1109 struct glyph_row
*row
;
1111 struct glyph
*p
[1 + LAST_AREA
];
1113 /* Save pointers. */
1114 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1115 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1116 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1117 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1122 /* Restore pointers. */
1123 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1124 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1125 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1126 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1128 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1129 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1130 Redisplay outputs such glyphs, and flickering effects were
1131 the result. This also depended on the contents of memory
1132 returned by xmalloc. If flickering happens again, activate
1133 the code below If the flickering is gone with that, chances
1134 are that the flickering has the same reason as here. */
1135 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1140 /* Make ROW an empty, enabled row of canonical character height,
1141 in window W starting at y-position Y. */
1144 blank_row (w
, row
, y
)
1146 struct glyph_row
*row
;
1151 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1152 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1154 clear_glyph_row (row
);
1156 row
->ascent
= row
->phys_ascent
= 0;
1157 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1158 row
->visible_height
= row
->height
;
1161 row
->visible_height
-= min_y
- row
->y
;
1162 if (row
->y
+ row
->height
> max_y
)
1163 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1169 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1170 are the amounts by which to change positions. Note that the first
1171 glyph of the text area of a row can have a buffer position even if
1172 the used count of the text area is zero. Such rows display line
1176 increment_row_positions (row
, delta
, delta_bytes
)
1177 struct glyph_row
*row
;
1178 int delta
, delta_bytes
;
1182 /* Increment start and end positions. */
1183 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1184 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1185 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1186 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1188 /* Increment positions in glyphs. */
1189 for (area
= 0; area
< LAST_AREA
; ++area
)
1190 for (i
= 0; i
< row
->used
[area
]; ++i
)
1191 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1192 && row
->glyphs
[area
][i
].charpos
> 0)
1193 row
->glyphs
[area
][i
].charpos
+= delta
;
1195 /* Capture the case of rows displaying a line end. */
1196 if (row
->used
[TEXT_AREA
] == 0
1197 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1198 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1203 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1204 contents, i.e. glyph structure contents are exchanged between A and
1205 B without changing glyph pointers in A and B. */
1208 swap_glyphs_in_rows (a
, b
)
1209 struct glyph_row
*a
, *b
;
1213 for (area
= 0; area
< LAST_AREA
; ++area
)
1215 /* Number of glyphs to swap. */
1216 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1218 /* Start of glyphs in area of row A. */
1219 struct glyph
*glyph_a
= a
->glyphs
[area
];
1221 /* End + 1 of glyphs in area of row A. */
1222 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1224 /* Start of glyphs in area of row B. */
1225 struct glyph
*glyph_b
= b
->glyphs
[area
];
1227 while (glyph_a
< glyph_a_end
)
1229 /* Non-ISO HP/UX compiler doesn't like auto struct
1233 *glyph_a
= *glyph_b
;
1243 /* Exchange pointers to glyph memory between glyph rows A and B. */
1246 swap_glyph_pointers (a
, b
)
1247 struct glyph_row
*a
, *b
;
1250 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1252 struct glyph
*temp
= a
->glyphs
[i
];
1253 a
->glyphs
[i
] = b
->glyphs
[i
];
1254 b
->glyphs
[i
] = temp
;
1259 /* Copy glyph row structure FROM to glyph row structure TO, except
1260 that glyph pointers in the structures are left unchanged. */
1263 copy_row_except_pointers (to
, from
)
1264 struct glyph_row
*to
, *from
;
1266 struct glyph
*pointers
[1 + LAST_AREA
];
1268 /* Save glyph pointers of TO. */
1269 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1271 /* Do a structure assignment. */
1274 /* Restore original pointers of TO. */
1275 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1279 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1280 TO and FROM are left unchanged. Glyph contents are copied from the
1281 glyph memory of FROM to the glyph memory of TO. Increment buffer
1282 positions in row TO by DELTA/ DELTA_BYTES. */
1285 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1286 struct glyph_row
*to
, *from
;
1287 int delta
, delta_bytes
;
1291 /* This is like a structure assignment TO = FROM, except that
1292 glyph pointers in the rows are left unchanged. */
1293 copy_row_except_pointers (to
, from
);
1295 /* Copy glyphs from FROM to TO. */
1296 for (area
= 0; area
< LAST_AREA
; ++area
)
1297 if (from
->used
[area
])
1298 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1299 from
->used
[area
] * sizeof (struct glyph
));
1301 /* Increment buffer positions in TO by DELTA. */
1302 increment_row_positions (to
, delta
, delta_bytes
);
1306 /* Assign glyph row FROM to glyph row TO. This works like a structure
1307 assignment TO = FROM, except that glyph pointers are not copied but
1308 exchanged between TO and FROM. Pointers must be exchanged to avoid
1312 assign_row (to
, from
)
1313 struct glyph_row
*to
, *from
;
1315 swap_glyph_pointers (to
, from
);
1316 copy_row_except_pointers (to
, from
);
1320 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1321 a row in a window matrix, is a slice of the glyph memory of the
1322 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1323 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1324 memory of FRAME_ROW. */
1329 glyph_row_slice_p (window_row
, frame_row
)
1330 struct glyph_row
*window_row
, *frame_row
;
1332 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1333 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1334 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1336 return (frame_glyph_start
<= window_glyph_start
1337 && window_glyph_start
< frame_glyph_end
);
1340 #endif /* GLYPH_DEBUG */
1344 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1345 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1346 in WINDOW_MATRIX is found satisfying the condition. */
1348 static struct glyph_row
*
1349 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1350 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1355 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1357 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1358 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1359 frame_matrix
->rows
+ row
))
1362 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1367 /* Prepare ROW for display. Desired rows are cleared lazily,
1368 i.e. they are only marked as to be cleared by setting their
1369 enabled_p flag to zero. When a row is to be displayed, a prior
1370 call to this function really clears it. */
1373 prepare_desired_row (row
)
1374 struct glyph_row
*row
;
1376 if (!row
->enabled_p
)
1378 clear_glyph_row (row
);
1384 /* Return a hash code for glyph row ROW. */
1387 line_hash_code (row
)
1388 struct glyph_row
*row
;
1396 /* Give all highlighted lines the same hash code
1397 so as to encourage scrolling to leave them in place. */
1402 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1403 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1407 int c
= glyph
->u
.ch
;
1408 int face_id
= glyph
->face_id
;
1409 if (must_write_spaces
)
1411 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1412 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1425 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1426 the number of characters in the line. If must_write_spaces is
1427 zero, leading and trailing spaces are ignored. */
1430 line_draw_cost (matrix
, vpos
)
1431 struct glyph_matrix
*matrix
;
1434 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1435 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1436 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1438 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1439 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1441 /* Ignore trailing and leading spaces if we can. */
1442 if (!must_write_spaces
)
1444 /* Skip from the end over trailing spaces. */
1445 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1448 /* All blank line. */
1452 /* Skip over leading spaces. */
1453 while (CHAR_GLYPH_SPACE_P (*beg
))
1457 /* If we don't have a glyph-table, each glyph is one character,
1458 so return the number of glyphs. */
1459 if (glyph_table_base
== 0)
1463 /* Otherwise, scan the glyphs and accumulate their total length
1468 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1471 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1474 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1484 /* Test two glyph rows A and B for equality. Value is non-zero if A
1485 and B have equal contents. W is the window to which the glyphs
1486 rows A and B belong. It is needed here to test for partial row
1487 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1488 flags of A and B, too. */
1491 row_equal_p (w
, a
, b
, mouse_face_p
)
1493 struct glyph_row
*a
, *b
;
1498 else if (a
->hash
!= b
->hash
)
1502 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1505 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1508 /* Compare glyphs. */
1509 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1511 if (a
->used
[area
] != b
->used
[area
])
1514 a_glyph
= a
->glyphs
[area
];
1515 a_end
= a_glyph
+ a
->used
[area
];
1516 b_glyph
= b
->glyphs
[area
];
1518 while (a_glyph
< a_end
1519 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1520 ++a_glyph
, ++b_glyph
;
1522 if (a_glyph
!= a_end
)
1526 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1527 || a
->inverse_p
!= b
->inverse_p
1528 || a
->fill_line_p
!= b
->fill_line_p
1529 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1530 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1531 || a
->continued_p
!= b
->continued_p
1532 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1533 || a
->overlapped_p
!= b
->overlapped_p
1534 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1535 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1536 /* Different partially visible characters on left margin. */
1538 /* Different height. */
1539 || a
->ascent
!= b
->ascent
1540 || a
->phys_ascent
!= b
->phys_ascent
1541 || a
->phys_height
!= b
->phys_height
1542 || a
->visible_height
!= b
->visible_height
)
1551 /***********************************************************************
1554 See dispextern.h for an overall explanation of glyph pools.
1555 ***********************************************************************/
1557 /* Allocate a glyph_pool structure. The structure returned is
1558 initialized with zeros. The global variable glyph_pool_count is
1559 incremented for each pool allocated. */
1561 static struct glyph_pool
*
1564 struct glyph_pool
*result
;
1566 /* Allocate a new glyph_pool and clear it. */
1567 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1568 bzero (result
, sizeof *result
);
1570 /* For memory leak and double deletion checking. */
1577 /* Free a glyph_pool structure POOL. The function may be called with
1578 a null POOL pointer. The global variable glyph_pool_count is
1579 decremented with every pool structure freed. If this count gets
1580 negative, more structures were freed than allocated, i.e. one
1581 structure must have been freed more than once or a bogus pointer
1582 was passed to free_glyph_pool. */
1585 free_glyph_pool (pool
)
1586 struct glyph_pool
*pool
;
1590 /* More freed than allocated? */
1592 xassert (glyph_pool_count
>= 0);
1594 xfree (pool
->glyphs
);
1600 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1601 columns we need. This function never shrinks a pool. The only
1602 case in which this would make sense, would be when a frame's size
1603 is changed from a large value to a smaller one. But, if someone
1604 does it once, we can expect that he will do it again.
1606 Value is non-zero if the pool changed in a way which makes
1607 re-adjusting window glyph matrices necessary. */
1610 realloc_glyph_pool (pool
, matrix_dim
)
1611 struct glyph_pool
*pool
;
1612 struct dim matrix_dim
;
1617 changed_p
= (pool
->glyphs
== 0
1618 || matrix_dim
.height
!= pool
->nrows
1619 || matrix_dim
.width
!= pool
->ncolumns
);
1621 /* Enlarge the glyph pool. */
1622 needed
= matrix_dim
.width
* matrix_dim
.height
;
1623 if (needed
> pool
->nglyphs
)
1625 int size
= needed
* sizeof (struct glyph
);
1628 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1631 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1632 bzero (pool
->glyphs
, size
);
1635 pool
->nglyphs
= needed
;
1638 /* Remember the number of rows and columns because (a) we use then
1639 to do sanity checks, and (b) the number of columns determines
1640 where rows in the frame matrix start---this must be available to
1641 determine pointers to rows of window sub-matrices. */
1642 pool
->nrows
= matrix_dim
.height
;
1643 pool
->ncolumns
= matrix_dim
.width
;
1650 /***********************************************************************
1652 ***********************************************************************/
1657 /* Flush standard output. This is sometimes useful to call from
1667 /* Check that no glyph pointers have been lost in MATRIX. If a
1668 pointer has been lost, e.g. by using a structure assignment between
1669 rows, at least one pointer must occur more than once in the rows of
1673 check_matrix_pointer_lossage (matrix
)
1674 struct glyph_matrix
*matrix
;
1678 for (i
= 0; i
< matrix
->nrows
; ++i
)
1679 for (j
= 0; j
< matrix
->nrows
; ++j
)
1681 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1682 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1686 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1689 matrix_row (matrix
, row
)
1690 struct glyph_matrix
*matrix
;
1693 xassert (matrix
&& matrix
->rows
);
1694 xassert (row
>= 0 && row
< matrix
->nrows
);
1696 /* That's really too slow for normal testing because this function
1697 is called almost everywhere. Although---it's still astonishingly
1698 fast, so it is valuable to have for debugging purposes. */
1700 check_matrix_pointer_lossage (matrix
);
1703 return matrix
->rows
+ row
;
1707 #if 0 /* This function makes invalid assumptions when text is
1708 partially invisible. But it might come handy for debugging
1711 /* Check invariants that must hold for an up to date current matrix of
1715 check_matrix_invariants (w
)
1718 struct glyph_matrix
*matrix
= w
->current_matrix
;
1719 int yb
= window_text_bottom_y (w
);
1720 struct glyph_row
*row
= matrix
->rows
;
1721 struct glyph_row
*last_text_row
= NULL
;
1722 struct buffer
*saved
= current_buffer
;
1723 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1726 /* This can sometimes happen for a fresh window. */
1727 if (matrix
->nrows
< 2)
1730 set_buffer_temp (buffer
);
1732 /* Note: last row is always reserved for the mode line. */
1733 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1734 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1736 struct glyph_row
*next
= row
+ 1;
1738 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1739 last_text_row
= row
;
1741 /* Check that character and byte positions are in sync. */
1742 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1743 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1745 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1746 have such a position temporarily in case of a minibuffer
1747 displaying something like `[Sole completion]' at its end. */
1748 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1749 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1750 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1752 /* Check that end position of `row' is equal to start position
1754 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1756 xassert (MATRIX_ROW_END_CHARPOS (row
)
1757 == MATRIX_ROW_START_CHARPOS (next
));
1758 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1759 == MATRIX_ROW_START_BYTEPOS (next
));
1764 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1765 xassert (w
->desired_matrix
->rows
!= NULL
);
1766 set_buffer_temp (saved
);
1771 #endif /* GLYPH_DEBUG != 0 */
1775 /**********************************************************************
1776 Allocating/ Adjusting Glyph Matrices
1777 **********************************************************************/
1779 /* Allocate glyph matrices over a window tree for a frame-based
1782 X and Y are column/row within the frame glyph matrix where
1783 sub-matrices for the window tree rooted at WINDOW must be
1784 allocated. CH_DIM contains the dimensions of the smallest
1785 character that could be used during display. DIM_ONLY_P non-zero
1786 means that the caller of this function is only interested in the
1787 result matrix dimension, and matrix adjustments should not be
1790 The function returns the total width/height of the sub-matrices of
1791 the window tree. If called on a frame root window, the computation
1792 will take the mini-buffer window into account.
1794 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1796 NEW_LEAF_MATRIX set if any window in the tree did not have a
1797 glyph matrices yet, and
1799 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1800 any window in the tree will be changed or have been changed (see
1803 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1806 Windows are arranged into chains of windows on the same level
1807 through the next fields of window structures. Such a level can be
1808 either a sequence of horizontally adjacent windows from left to
1809 right, or a sequence of vertically adjacent windows from top to
1810 bottom. Each window in a horizontal sequence can be either a leaf
1811 window or a vertical sequence; a window in a vertical sequence can
1812 be either a leaf or a horizontal sequence. All windows in a
1813 horizontal sequence have the same height, and all windows in a
1814 vertical sequence have the same width.
1816 This function uses, for historical reasons, a more general
1817 algorithm to determine glyph matrix dimensions that would be
1820 The matrix height of a horizontal sequence is determined by the
1821 maximum height of any matrix in the sequence. The matrix width of
1822 a horizontal sequence is computed by adding up matrix widths of
1823 windows in the sequence.
1825 |<------- result width ------->|
1826 +---------+----------+---------+ ---
1829 +---------+ | | result height
1834 The matrix width of a vertical sequence is the maximum matrix width
1835 of any window in the sequence. Its height is computed by adding up
1836 matrix heights of windows in the sequence.
1838 |<---- result width -->|
1846 +------------+---------+ |
1849 +------------+---------+ --- */
1851 /* Bit indicating that a new matrix will be allocated or has been
1854 #define NEW_LEAF_MATRIX (1 << 0)
1856 /* Bit indicating that a matrix will or has changed its location or
1859 #define CHANGED_LEAF_MATRIX (1 << 1)
1862 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1863 dim_only_p
, window_change_flags
)
1868 int *window_change_flags
;
1870 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1872 int wmax
= 0, hmax
= 0;
1876 int in_horz_combination_p
;
1878 /* What combination is WINDOW part of? Compute this once since the
1879 result is the same for all windows in the `next' chain. The
1880 special case of a root window (parent equal to nil) is treated
1881 like a vertical combination because a root window's `next'
1882 points to the mini-buffer window, if any, which is arranged
1883 vertically below other windows. */
1884 in_horz_combination_p
1885 = (!NILP (XWINDOW (window
)->parent
)
1886 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1888 /* For WINDOW and all windows on the same level. */
1891 w
= XWINDOW (window
);
1893 /* Get the dimension of the window sub-matrix for W, depending
1894 on whether this a combination or a leaf window. */
1895 if (!NILP (w
->hchild
))
1896 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1898 window_change_flags
);
1899 else if (!NILP (w
->vchild
))
1900 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1902 window_change_flags
);
1905 /* If not already done, allocate sub-matrix structures. */
1906 if (w
->desired_matrix
== NULL
)
1908 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1909 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1910 *window_change_flags
|= NEW_LEAF_MATRIX
;
1913 /* Width and height MUST be chosen so that there are no
1914 holes in the frame matrix. */
1915 dim
.width
= XINT (w
->width
);
1916 dim
.height
= XINT (w
->height
);
1918 /* Will matrix be re-allocated? */
1919 if (x
!= w
->desired_matrix
->matrix_x
1920 || y
!= w
->desired_matrix
->matrix_y
1921 || dim
.width
!= w
->desired_matrix
->matrix_w
1922 || dim
.height
!= w
->desired_matrix
->matrix_h
1923 || (margin_glyphs_to_reserve (w
, dim
.width
,
1924 w
->right_margin_width
)
1925 != w
->desired_matrix
->left_margin_glyphs
)
1926 || (margin_glyphs_to_reserve (w
, dim
.width
,
1927 w
->left_margin_width
)
1928 != w
->desired_matrix
->right_margin_glyphs
))
1929 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1931 /* Actually change matrices, if allowed. Do not consider
1932 CHANGED_LEAF_MATRIX computed above here because the pool
1933 may have been changed which we don't now here. We trust
1934 that we only will be called with DIM_ONLY_P != 0 when
1938 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1939 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1943 /* If we are part of a horizontal combination, advance x for
1944 windows to the right of W; otherwise advance y for windows
1946 if (in_horz_combination_p
)
1951 /* Remember maximum glyph matrix dimensions. */
1952 wmax
= max (wmax
, dim
.width
);
1953 hmax
= max (hmax
, dim
.height
);
1955 /* Next window on same level. */
1958 while (!NILP (window
));
1960 /* Set `total' to the total glyph matrix dimension of this window
1961 level. In a vertical combination, the width is the width of the
1962 widest window; the height is the y we finally reached, corrected
1963 by the y we started with. In a horizontal combination, the total
1964 height is the height of the tallest window, and the width is the
1965 x we finally reached, corrected by the x we started with. */
1966 if (in_horz_combination_p
)
1968 total
.width
= x
- x0
;
1969 total
.height
= hmax
;
1974 total
.height
= y
- y0
;
1981 /* Allocate window matrices for window-based redisplay. W is the
1982 window whose matrices must be allocated/reallocated. CH_DIM is the
1983 size of the smallest character that could potentially be used on W. */
1986 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1990 struct frame
*f
= XFRAME (w
->frame
);
1994 if (!NILP (w
->vchild
))
1995 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1996 else if (!NILP (w
->hchild
))
1997 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
2000 /* W is a leaf window. */
2001 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
2002 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
2005 /* If matrices are not yet allocated, allocate them now. */
2006 if (w
->desired_matrix
== NULL
)
2008 w
->desired_matrix
= new_glyph_matrix (NULL
);
2009 w
->current_matrix
= new_glyph_matrix (NULL
);
2012 /* Compute number of glyphs needed in a glyph row. */
2013 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
2015 /* 2 partially visible columns in the text area. */
2017 /* One partially visible column at the right
2018 edge of each marginal area. */
2021 /* Compute number of glyph rows needed. */
2022 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
2024 /* One partially visible line at the top and
2025 bottom of the window. */
2027 /* 2 for top and mode line. */
2030 /* Change matrices. */
2031 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2032 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2035 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2040 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2041 do it for all frames; otherwise do it just for the given frame.
2042 This function must be called when a new frame is created, its size
2043 changes, or its window configuration changes. */
2049 /* Block input so that expose events and other events that access
2050 glyph matrices are not processed while we are changing them. */
2054 adjust_frame_glyphs (f
);
2057 Lisp_Object tail
, lisp_frame
;
2059 FOR_EACH_FRAME (tail
, lisp_frame
)
2060 adjust_frame_glyphs (XFRAME (lisp_frame
));
2067 /* Adjust frame glyphs when Emacs is initialized.
2069 To be called from init_display.
2071 We need a glyph matrix because redraw will happen soon.
2072 Unfortunately, window sizes on selected_frame are not yet set to
2073 meaningful values. I believe we can assume that there are only two
2074 windows on the frame---the mini-buffer and the root window. Frame
2075 height and width seem to be correct so far. So, set the sizes of
2076 windows to estimated values. */
2079 adjust_frame_glyphs_initially ()
2081 struct frame
*sf
= SELECTED_FRAME ();
2082 struct window
*root
= XWINDOW (sf
->root_window
);
2083 struct window
*mini
= XWINDOW (root
->next
);
2084 int frame_height
= FRAME_HEIGHT (sf
);
2085 int frame_width
= FRAME_WIDTH (sf
);
2086 int top_margin
= FRAME_TOP_MARGIN (sf
);
2088 /* Do it for the root window. */
2089 XSETFASTINT (root
->top
, top_margin
);
2090 XSETFASTINT (root
->width
, frame_width
);
2091 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2093 /* Do it for the mini-buffer window. */
2094 XSETFASTINT (mini
->top
, frame_height
- 1);
2095 XSETFASTINT (mini
->width
, frame_width
);
2096 set_window_height (root
->next
, 1, 0);
2098 adjust_frame_glyphs (sf
);
2099 glyphs_initialized_initially_p
= 1;
2103 /* Allocate/reallocate glyph matrices of a single frame F. */
2106 adjust_frame_glyphs (f
)
2109 if (FRAME_WINDOW_P (f
))
2110 adjust_frame_glyphs_for_window_redisplay (f
);
2112 adjust_frame_glyphs_for_frame_redisplay (f
);
2114 /* Don't forget the message buffer and the buffer for
2115 decode_mode_spec. */
2116 adjust_frame_message_buffer (f
);
2117 adjust_decode_mode_spec_buffer (f
);
2119 f
->glyphs_initialized_p
= 1;
2123 /* In the window tree with root W, build current matrices of leaf
2124 windows from the frame's current matrix. */
2127 fake_current_matrices (window
)
2132 for (; !NILP (window
); window
= w
->next
)
2134 w
= XWINDOW (window
);
2136 if (!NILP (w
->hchild
))
2137 fake_current_matrices (w
->hchild
);
2138 else if (!NILP (w
->vchild
))
2139 fake_current_matrices (w
->vchild
);
2143 struct frame
*f
= XFRAME (w
->frame
);
2144 struct glyph_matrix
*m
= w
->current_matrix
;
2145 struct glyph_matrix
*fm
= f
->current_matrix
;
2147 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2148 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2150 for (i
= 0; i
< m
->matrix_h
; ++i
)
2152 struct glyph_row
*r
= m
->rows
+ i
;
2153 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2155 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2156 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2158 r
->enabled_p
= fr
->enabled_p
;
2161 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2162 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2163 r
->used
[TEXT_AREA
] = (m
->matrix_w
2164 - r
->used
[LEFT_MARGIN_AREA
]
2165 - r
->used
[RIGHT_MARGIN_AREA
]);
2167 r
->inverse_p
= fr
->inverse_p
;
2175 /* Save away the contents of frame F's current frame matrix. Value is
2176 a glyph matrix holding the contents of F's current frame matrix. '*/
2178 static struct glyph_matrix
*
2179 save_current_matrix (f
)
2183 struct glyph_matrix
*saved
;
2185 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2186 bzero (saved
, sizeof *saved
);
2187 saved
->nrows
= f
->current_matrix
->nrows
;
2188 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2189 * sizeof *saved
->rows
);
2190 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2192 for (i
= 0; i
< saved
->nrows
; ++i
)
2194 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2195 struct glyph_row
*to
= saved
->rows
+ i
;
2196 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2197 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2198 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2199 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2206 /* Restore the contents of frame F's current frame matrix from SAVED,
2207 and free memory associated with SAVED. */
2210 restore_current_matrix (f
, saved
)
2212 struct glyph_matrix
*saved
;
2216 for (i
= 0; i
< saved
->nrows
; ++i
)
2218 struct glyph_row
*from
= saved
->rows
+ i
;
2219 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2220 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2221 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2222 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2223 xfree (from
->glyphs
[TEXT_AREA
]);
2226 xfree (saved
->rows
);
2232 /* Allocate/reallocate glyph matrices of a single frame F for
2233 frame-based redisplay. */
2236 adjust_frame_glyphs_for_frame_redisplay (f
)
2240 struct dim matrix_dim
;
2242 int window_change_flags
;
2245 if (!FRAME_LIVE_P (f
))
2248 /* Determine the smallest character in any font for F. On
2249 console windows, all characters have dimension (1, 1). */
2250 ch_dim
.width
= ch_dim
.height
= 1;
2252 top_window_y
= FRAME_TOP_MARGIN (f
);
2254 /* Allocate glyph pool structures if not already done. */
2255 if (f
->desired_pool
== NULL
)
2257 f
->desired_pool
= new_glyph_pool ();
2258 f
->current_pool
= new_glyph_pool ();
2261 /* Allocate frames matrix structures if needed. */
2262 if (f
->desired_matrix
== NULL
)
2264 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2265 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2268 /* Compute window glyph matrices. (This takes the mini-buffer
2269 window into account). The result is the size of the frame glyph
2270 matrix needed. The variable window_change_flags is set to a bit
2271 mask indicating whether new matrices will be allocated or
2272 existing matrices change their size or location within the frame
2274 window_change_flags
= 0;
2276 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2279 &window_change_flags
);
2281 /* Add in menu bar lines, if any. */
2282 matrix_dim
.height
+= top_window_y
;
2284 /* Enlarge pools as necessary. */
2285 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2286 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2288 /* Set up glyph pointers within window matrices. Do this only if
2289 absolutely necessary since it requires a frame redraw. */
2290 if (pool_changed_p
|| window_change_flags
)
2292 /* Do it for window matrices. */
2293 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2294 0, top_window_y
, ch_dim
, 0,
2295 &window_change_flags
);
2297 /* Size of frame matrices must equal size of frame. Note
2298 that we are called for X frames with window widths NOT equal
2299 to the frame width (from CHANGE_FRAME_SIZE_1). */
2300 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2301 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2303 /* Pointers to glyph memory in glyph rows are exchanged during
2304 the update phase of redisplay, which means in general that a
2305 frame's current matrix consists of pointers into both the
2306 desired and current glyph pool of the frame. Adjusting a
2307 matrix sets the frame matrix up so that pointers are all into
2308 the same pool. If we want to preserve glyph contents of the
2309 current matrix over a call to adjust_glyph_matrix, we must
2310 make a copy of the current glyphs, and restore the current
2311 matrix' contents from that copy. */
2312 if (display_completed
2313 && !FRAME_GARBAGED_P (f
)
2314 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2315 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2317 struct glyph_matrix
*copy
= save_current_matrix (f
);
2318 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2319 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2320 restore_current_matrix (f
, copy
);
2321 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2325 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2326 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2327 SET_FRAME_GARBAGED (f
);
2333 /* Allocate/reallocate glyph matrices of a single frame F for
2334 window-based redisplay. */
2337 adjust_frame_glyphs_for_window_redisplay (f
)
2343 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2345 /* Get minimum sizes. */
2346 #ifdef HAVE_WINDOW_SYSTEM
2347 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2348 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2350 ch_dim
.width
= ch_dim
.height
= 1;
2353 /* Allocate/reallocate window matrices. */
2354 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2357 /* Allocate/ reallocate matrices of the dummy window used to display
2358 the menu bar under X when no X toolkit support is available. */
2359 #ifndef USE_X_TOOLKIT
2361 /* Allocate a dummy window if not already done. */
2362 if (NILP (f
->menu_bar_window
))
2364 f
->menu_bar_window
= make_window ();
2365 w
= XWINDOW (f
->menu_bar_window
);
2366 XSETFRAME (w
->frame
, f
);
2367 w
->pseudo_window_p
= 1;
2370 w
= XWINDOW (f
->menu_bar_window
);
2372 /* Set window dimensions to frame dimensions and allocate or
2373 adjust glyph matrices of W. */
2374 XSETFASTINT (w
->top
, 0);
2375 XSETFASTINT (w
->left
, 0);
2376 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2377 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2378 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2380 #endif /* not USE_X_TOOLKIT */
2382 /* Allocate/ reallocate matrices of the tool bar window. If we
2383 don't have a tool bar window yet, make one. */
2384 if (NILP (f
->tool_bar_window
))
2386 f
->tool_bar_window
= make_window ();
2387 w
= XWINDOW (f
->tool_bar_window
);
2388 XSETFRAME (w
->frame
, f
);
2389 w
->pseudo_window_p
= 1;
2392 w
= XWINDOW (f
->tool_bar_window
);
2394 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2395 XSETFASTINT (w
->left
, 0);
2396 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2397 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2398 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2402 /* Adjust/ allocate message buffer of frame F.
2404 Note that the message buffer is never freed. Since I could not
2405 find a free in 19.34, I assume that freeing it would be
2406 problematic in some way and don't do it either.
2408 (Implementation note: It should be checked if we can free it
2409 eventually without causing trouble). */
2412 adjust_frame_message_buffer (f
)
2415 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2417 if (FRAME_MESSAGE_BUF (f
))
2419 char *buffer
= FRAME_MESSAGE_BUF (f
);
2420 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2421 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2424 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2428 /* Re-allocate buffer for decode_mode_spec on frame F. */
2431 adjust_decode_mode_spec_buffer (f
)
2434 f
->decode_mode_spec_buffer
2435 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2436 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2441 /**********************************************************************
2442 Freeing Glyph Matrices
2443 **********************************************************************/
2445 /* Free glyph memory for a frame F. F may be null. This function can
2446 be called for the same frame more than once. The root window of
2447 F may be nil when this function is called. This is the case when
2448 the function is called when F is destroyed. */
2454 if (f
&& f
->glyphs_initialized_p
)
2456 /* Block interrupt input so that we don't get surprised by an X
2457 event while we're in an inconsistent state. */
2459 f
->glyphs_initialized_p
= 0;
2461 /* Release window sub-matrices. */
2462 if (!NILP (f
->root_window
))
2463 free_window_matrices (XWINDOW (f
->root_window
));
2465 /* Free the dummy window for menu bars without X toolkit and its
2467 if (!NILP (f
->menu_bar_window
))
2469 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2470 free_glyph_matrix (w
->desired_matrix
);
2471 free_glyph_matrix (w
->current_matrix
);
2472 w
->desired_matrix
= w
->current_matrix
= NULL
;
2473 f
->menu_bar_window
= Qnil
;
2476 /* Free the tool bar window and its glyph matrices. */
2477 if (!NILP (f
->tool_bar_window
))
2479 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2480 free_glyph_matrix (w
->desired_matrix
);
2481 free_glyph_matrix (w
->current_matrix
);
2482 w
->desired_matrix
= w
->current_matrix
= NULL
;
2483 f
->tool_bar_window
= Qnil
;
2486 /* Release frame glyph matrices. Reset fields to zero in
2487 case we are called a second time. */
2488 if (f
->desired_matrix
)
2490 free_glyph_matrix (f
->desired_matrix
);
2491 free_glyph_matrix (f
->current_matrix
);
2492 f
->desired_matrix
= f
->current_matrix
= NULL
;
2495 /* Release glyph pools. */
2496 if (f
->desired_pool
)
2498 free_glyph_pool (f
->desired_pool
);
2499 free_glyph_pool (f
->current_pool
);
2500 f
->desired_pool
= f
->current_pool
= NULL
;
2508 /* Free glyph sub-matrices in the window tree rooted at W. This
2509 function may be called with a null pointer, and it may be called on
2510 the same tree more than once. */
2513 free_window_matrices (w
)
2518 if (!NILP (w
->hchild
))
2519 free_window_matrices (XWINDOW (w
->hchild
));
2520 else if (!NILP (w
->vchild
))
2521 free_window_matrices (XWINDOW (w
->vchild
));
2524 /* This is a leaf window. Free its memory and reset fields
2525 to zero in case this function is called a second time for
2527 free_glyph_matrix (w
->current_matrix
);
2528 free_glyph_matrix (w
->desired_matrix
);
2529 w
->current_matrix
= w
->desired_matrix
= NULL
;
2532 /* Next window on same level. */
2533 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2538 /* Check glyph memory leaks. This function is called from
2539 shut_down_emacs. Note that frames are not destroyed when Emacs
2540 exits. We therefore free all glyph memory for all active frames
2541 explicitly and check that nothing is left allocated. */
2544 check_glyph_memory ()
2546 Lisp_Object tail
, frame
;
2548 /* Free glyph memory for all frames. */
2549 FOR_EACH_FRAME (tail
, frame
)
2550 free_glyphs (XFRAME (frame
));
2552 /* Check that nothing is left allocated. */
2553 if (glyph_matrix_count
)
2555 if (glyph_pool_count
)
2561 /**********************************************************************
2562 Building a Frame Matrix
2563 **********************************************************************/
2565 /* Most of the redisplay code works on glyph matrices attached to
2566 windows. This is a good solution most of the time, but it is not
2567 suitable for terminal code. Terminal output functions cannot rely
2568 on being able to set an arbitrary terminal window. Instead they
2569 must be provided with a view of the whole frame, i.e. the whole
2570 screen. We build such a view by constructing a frame matrix from
2571 window matrices in this section.
2573 Windows that must be updated have their must_be_update_p flag set.
2574 For all such windows, their desired matrix is made part of the
2575 desired frame matrix. For other windows, their current matrix is
2576 made part of the desired frame matrix.
2578 +-----------------+----------------+
2579 | desired | desired |
2581 +-----------------+----------------+
2584 +----------------------------------+
2586 Desired window matrices can be made part of the frame matrix in a
2587 cheap way: We exploit the fact that the desired frame matrix and
2588 desired window matrices share their glyph memory. This is not
2589 possible for current window matrices. Their glyphs are copied to
2590 the desired frame matrix. The latter is equivalent to
2591 preserve_other_columns in the old redisplay.
2593 Used glyphs counters for frame matrix rows are the result of adding
2594 up glyph lengths of the window matrices. A line in the frame
2595 matrix is enabled, if a corresponding line in a window matrix is
2598 After building the desired frame matrix, it will be passed to
2599 terminal code, which will manipulate both the desired and current
2600 frame matrix. Changes applied to the frame's current matrix have
2601 to be visible in current window matrices afterwards, of course.
2603 This problem is solved like this:
2605 1. Window and frame matrices share glyphs. Window matrices are
2606 constructed in a way that their glyph contents ARE the glyph
2607 contents needed in a frame matrix. Thus, any modification of
2608 glyphs done in terminal code will be reflected in window matrices
2611 2. Exchanges of rows in a frame matrix done by terminal code are
2612 intercepted by hook functions so that corresponding row operations
2613 on window matrices can be performed. This is necessary because we
2614 use pointers to glyphs in glyph row structures. To satisfy the
2615 assumption of point 1 above that glyphs are updated implicitly in
2616 window matrices when they are manipulated via the frame matrix,
2617 window and frame matrix must of course agree where to find the
2618 glyphs for their rows. Possible manipulations that must be
2619 mirrored are assignments of rows of the desired frame matrix to the
2620 current frame matrix and scrolling the current frame matrix. */
2622 /* Build frame F's desired matrix from window matrices. Only windows
2623 which have the flag must_be_updated_p set have to be updated. Menu
2624 bar lines of a frame are not covered by window matrices, so make
2625 sure not to touch them in this function. */
2628 build_frame_matrix (f
)
2633 /* F must have a frame matrix when this function is called. */
2634 xassert (!FRAME_WINDOW_P (f
));
2636 /* Clear all rows in the frame matrix covered by window matrices.
2637 Menu bar lines are not covered by windows. */
2638 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2639 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2641 /* Build the matrix by walking the window tree. */
2642 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2643 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2647 /* Walk a window tree, building a frame matrix MATRIX from window
2648 matrices. W is the root of a window tree. */
2651 build_frame_matrix_from_window_tree (matrix
, w
)
2652 struct glyph_matrix
*matrix
;
2657 if (!NILP (w
->hchild
))
2658 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2659 else if (!NILP (w
->vchild
))
2660 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2662 build_frame_matrix_from_leaf_window (matrix
, w
);
2664 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2669 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2670 desired frame matrix built. W is a leaf window whose desired or
2671 current matrix is to be added to FRAME_MATRIX. W's flag
2672 must_be_updated_p determines which matrix it contributes to
2673 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2674 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2675 Adding a desired matrix means setting up used counters and such in
2676 frame rows, while adding a current window matrix to FRAME_MATRIX
2677 means copying glyphs. The latter case corresponds to
2678 preserve_other_columns in the old redisplay. */
2681 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2682 struct glyph_matrix
*frame_matrix
;
2685 struct glyph_matrix
*window_matrix
;
2686 int window_y
, frame_y
;
2687 /* If non-zero, a glyph to insert at the right border of W. */
2688 GLYPH right_border_glyph
= 0;
2690 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2691 if (w
->must_be_updated_p
)
2693 window_matrix
= w
->desired_matrix
;
2695 /* Decide whether we want to add a vertical border glyph. */
2696 if (!WINDOW_RIGHTMOST_P (w
))
2698 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2699 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2700 ? XINT (DISP_BORDER_GLYPH (dp
))
2705 window_matrix
= w
->current_matrix
;
2707 /* For all rows in the window matrix and corresponding rows in the
2710 frame_y
= window_matrix
->matrix_y
;
2711 while (window_y
< window_matrix
->nrows
)
2713 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2714 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2715 int current_row_p
= window_matrix
== w
->current_matrix
;
2717 /* Fill up the frame row with spaces up to the left margin of the
2719 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2721 /* Fill up areas in the window matrix row with spaces. */
2722 fill_up_glyph_row_with_spaces (window_row
);
2724 /* If only part of W's desired matrix has been built, and
2725 window_row wasn't displayed, use the corresponding current
2727 if (window_matrix
== w
->desired_matrix
2728 && !window_row
->enabled_p
)
2730 window_row
= w
->current_matrix
->rows
+ window_y
;
2736 /* Copy window row to frame row. */
2737 bcopy (window_row
->glyphs
[0],
2738 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2739 window_matrix
->matrix_w
* sizeof (struct glyph
));
2743 xassert (window_row
->enabled_p
);
2745 /* Only when a desired row has been displayed, we want
2746 the corresponding frame row to be updated. */
2747 frame_row
->enabled_p
= 1;
2749 /* Maybe insert a vertical border between horizontally adjacent
2751 if (right_border_glyph
)
2753 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2754 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2757 /* Window row window_y must be a slice of frame row
2759 xassert (glyph_row_slice_p (window_row
, frame_row
));
2761 /* If rows are in sync, we don't have to copy glyphs because
2762 frame and window share glyphs. */
2765 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2766 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2770 /* Set number of used glyphs in the frame matrix. Since we fill
2771 up with spaces, and visit leaf windows from left to right it
2772 can be done simply. */
2773 frame_row
->used
[TEXT_AREA
]
2774 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2776 /* Or in other flags. */
2777 frame_row
->inverse_p
|= window_row
->inverse_p
;
2786 /* Add spaces to a glyph row ROW in a window matrix.
2788 Each row has the form:
2790 +---------+-----------------------------+------------+
2791 | left | text | right |
2792 +---------+-----------------------------+------------+
2794 Left and right marginal areas are optional. This function adds
2795 spaces to areas so that there are no empty holes between areas.
2796 In other words: If the right area is not empty, the text area
2797 is filled up with spaces up to the right area. If the text area
2798 is not empty, the left area is filled up.
2800 To be called for frame-based redisplay, only. */
2803 fill_up_glyph_row_with_spaces (row
)
2804 struct glyph_row
*row
;
2806 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2807 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2808 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2812 /* Fill area AREA of glyph row ROW with spaces. To be called for
2813 frame-based redisplay only. */
2816 fill_up_glyph_row_area_with_spaces (row
, area
)
2817 struct glyph_row
*row
;
2820 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2822 struct glyph
*end
= row
->glyphs
[area
+ 1];
2823 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2826 *text
++ = space_glyph
;
2827 row
->used
[area
] = text
- row
->glyphs
[area
];
2832 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2833 reached. In frame matrices only one area, TEXT_AREA, is used. */
2836 fill_up_frame_row_with_spaces (row
, upto
)
2837 struct glyph_row
*row
;
2840 int i
= row
->used
[TEXT_AREA
];
2841 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2844 glyph
[i
++] = space_glyph
;
2846 row
->used
[TEXT_AREA
] = i
;
2851 /**********************************************************************
2852 Mirroring operations on frame matrices in window matrices
2853 **********************************************************************/
2855 /* Set frame being updated via frame-based redisplay to F. This
2856 function must be called before updates to make explicit that we are
2857 working on frame matrices or not. */
2860 set_frame_matrix_frame (f
)
2863 frame_matrix_frame
= f
;
2867 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2868 DESIRED_MATRIX is the desired matrix corresponding to
2869 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2870 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2871 frame_matrix_frame is non-null, this indicates that the exchange is
2872 done in frame matrices, and that we have to perform analogous
2873 operations in window matrices of frame_matrix_frame. */
2876 make_current (desired_matrix
, current_matrix
, row
)
2877 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2880 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2881 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2882 int mouse_face_p
= current_row
->mouse_face_p
;
2884 /* Do current_row = desired_row. This exchanges glyph pointers
2885 between both rows, and does a structure assignment otherwise. */
2886 assign_row (current_row
, desired_row
);
2888 /* Enable current_row to mark it as valid. */
2889 current_row
->enabled_p
= 1;
2890 current_row
->mouse_face_p
= mouse_face_p
;
2892 /* If we are called on frame matrices, perform analogous operations
2893 for window matrices. */
2894 if (frame_matrix_frame
)
2895 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2899 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2900 W's frame which has been made current (by swapping pointers between
2901 current and desired matrix). Perform analogous operations in the
2902 matrices of leaf windows in the window tree rooted at W. */
2905 mirror_make_current (w
, frame_row
)
2911 if (!NILP (w
->hchild
))
2912 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2913 else if (!NILP (w
->vchild
))
2914 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2917 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2918 here because the checks performed in debug mode there
2919 will not allow the conversion. */
2920 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2922 /* If FRAME_ROW is within W, assign the desired row to the
2923 current row (exchanging glyph pointers). */
2924 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2926 struct glyph_row
*current_row
2927 = MATRIX_ROW (w
->current_matrix
, row
);
2928 struct glyph_row
*desired_row
2929 = MATRIX_ROW (w
->desired_matrix
, row
);
2931 if (desired_row
->enabled_p
)
2932 assign_row (current_row
, desired_row
);
2934 swap_glyph_pointers (desired_row
, current_row
);
2935 current_row
->enabled_p
= 1;
2939 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2944 /* Perform row dance after scrolling. We are working on the range of
2945 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2946 including) in MATRIX. COPY_FROM is a vector containing, for each
2947 row I in the range 0 <= I < NLINES, the index of the original line
2948 to move to I. This index is relative to the row range, i.e. 0 <=
2949 index < NLINES. RETAINED_P is a vector containing zero for each
2950 row 0 <= I < NLINES which is empty.
2952 This function is called from do_scrolling and do_direct_scrolling. */
2955 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2957 struct glyph_matrix
*matrix
;
2958 int unchanged_at_top
, nlines
;
2962 /* A copy of original rows. */
2963 struct glyph_row
*old_rows
;
2965 /* Rows to assign to. */
2966 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2970 /* Make a copy of the original rows. */
2971 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2972 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2974 /* Assign new rows, maybe clear lines. */
2975 for (i
= 0; i
< nlines
; ++i
)
2977 int enabled_before_p
= new_rows
[i
].enabled_p
;
2979 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2980 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2981 new_rows
[i
] = old_rows
[copy_from
[i
]];
2982 new_rows
[i
].enabled_p
= enabled_before_p
;
2984 /* RETAINED_P is zero for empty lines. */
2985 if (!retained_p
[copy_from
[i
]])
2986 new_rows
[i
].enabled_p
= 0;
2989 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2990 if (frame_matrix_frame
)
2991 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2992 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2996 /* Synchronize glyph pointers in the current matrix of window W with
2997 the current frame matrix. W must be full-width, and be on a tty
3001 sync_window_with_frame_matrix_rows (w
)
3004 struct frame
*f
= XFRAME (w
->frame
);
3005 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3007 /* Preconditions: W must be a leaf window and full-width. Its frame
3008 must have a frame matrix. */
3009 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3010 xassert (WINDOW_FULL_WIDTH_P (w
));
3011 xassert (!FRAME_WINDOW_P (f
));
3013 /* If W is a full-width window, glyph pointers in W's current matrix
3014 have, by definition, to be the same as glyph pointers in the
3015 corresponding frame matrix. */
3016 window_row
= w
->current_matrix
->rows
;
3017 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3018 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
3019 while (window_row
< window_row_end
)
3023 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
3024 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
3026 ++window_row
, ++frame_row
;
3031 /* Return the window in the window tree rooted in W containing frame
3032 row ROW. Value is null if none is found. */
3035 frame_row_to_window (w
, row
)
3039 struct window
*found
= NULL
;
3043 if (!NILP (w
->hchild
))
3044 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3045 else if (!NILP (w
->vchild
))
3046 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3047 else if (row
>= XFASTINT (w
->top
)
3048 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3051 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3058 /* Perform a line dance in the window tree rooted at W, after
3059 scrolling a frame matrix in mirrored_line_dance.
3061 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3062 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3063 COPY_FROM is a vector containing, for each row I in the range 0 <=
3064 I < NLINES, the index of the original line to move to I. This
3065 index is relative to the row range, i.e. 0 <= index < NLINES.
3066 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3070 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3072 int unchanged_at_top
, nlines
;
3078 if (!NILP (w
->hchild
))
3079 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3080 nlines
, copy_from
, retained_p
);
3081 else if (!NILP (w
->vchild
))
3082 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3083 nlines
, copy_from
, retained_p
);
3086 /* W is a leaf window, and we are working on its current
3088 struct glyph_matrix
*m
= w
->current_matrix
;
3090 struct glyph_row
*old_rows
;
3092 /* Make a copy of the original rows of matrix m. */
3093 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3094 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3096 for (i
= 0; i
< nlines
; ++i
)
3098 /* Frame relative line assigned to. */
3099 int frame_to
= i
+ unchanged_at_top
;
3101 /* Frame relative line assigned. */
3102 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3104 /* Window relative line assigned to. */
3105 int window_to
= frame_to
- m
->matrix_y
;
3107 /* Window relative line assigned. */
3108 int window_from
= frame_from
- m
->matrix_y
;
3110 /* Is assigned line inside window? */
3111 int from_inside_window_p
3112 = window_from
>= 0 && window_from
< m
->matrix_h
;
3114 /* Is assigned to line inside window? */
3115 int to_inside_window_p
3116 = window_to
>= 0 && window_to
< m
->matrix_h
;
3118 if (from_inside_window_p
&& to_inside_window_p
)
3120 /* Enabled setting before assignment. */
3121 int enabled_before_p
;
3123 /* Do the assignment. The enabled_p flag is saved
3124 over the assignment because the old redisplay did
3126 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3127 m
->rows
[window_to
] = old_rows
[window_from
];
3128 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3130 /* If frame line is empty, window line is empty, too. */
3131 if (!retained_p
[copy_from
[i
]])
3132 m
->rows
[window_to
].enabled_p
= 0;
3134 else if (to_inside_window_p
)
3136 /* A copy between windows. This is an infrequent
3137 case not worth optimizing. */
3138 struct frame
*f
= XFRAME (w
->frame
);
3139 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3141 struct glyph_matrix
*m2
;
3144 w2
= frame_row_to_window (root
, frame_to
);
3145 m2
= w2
->current_matrix
;
3146 m2_from
= frame_from
- m2
->matrix_y
;
3147 copy_row_except_pointers (m
->rows
+ window_to
,
3148 m2
->rows
+ m2_from
);
3150 /* If frame line is empty, window line is empty, too. */
3151 if (!retained_p
[copy_from
[i
]])
3152 m
->rows
[window_to
].enabled_p
= 0;
3155 else if (from_inside_window_p
)
3159 /* If there was a copy between windows, make sure glyph
3160 pointers are in sync with the frame matrix. */
3162 sync_window_with_frame_matrix_rows (w
);
3164 /* Check that no pointers are lost. */
3168 /* Next window on same level. */
3169 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3176 /* Check that window and frame matrices agree about their
3177 understanding where glyphs of the rows are to find. For each
3178 window in the window tree rooted at W, check that rows in the
3179 matrices of leaf window agree with their frame matrices about
3183 check_window_matrix_pointers (w
)
3188 if (!NILP (w
->hchild
))
3189 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3190 else if (!NILP (w
->vchild
))
3191 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3194 struct frame
*f
= XFRAME (w
->frame
);
3195 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3196 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3199 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3204 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3205 a window and FRAME_MATRIX is the corresponding frame matrix. For
3206 each row in WINDOW_MATRIX check that it's a slice of the
3207 corresponding frame row. If it isn't, abort. */
3210 check_matrix_pointers (window_matrix
, frame_matrix
)
3211 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3213 /* Row number in WINDOW_MATRIX. */
3216 /* Row number corresponding to I in FRAME_MATRIX. */
3217 int j
= window_matrix
->matrix_y
;
3219 /* For all rows check that the row in the window matrix is a
3220 slice of the row in the frame matrix. If it isn't we didn't
3221 mirror an operation on the frame matrix correctly. */
3222 while (i
< window_matrix
->nrows
)
3224 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3225 frame_matrix
->rows
+ j
))
3231 #endif /* GLYPH_DEBUG != 0 */
3235 /**********************************************************************
3236 VPOS and HPOS translations
3237 **********************************************************************/
3241 /* Translate vertical position VPOS which is relative to window W to a
3242 vertical position relative to W's frame. */
3245 window_to_frame_vpos (w
, vpos
)
3249 struct frame
*f
= XFRAME (w
->frame
);
3251 xassert (!FRAME_WINDOW_P (f
));
3252 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3253 vpos
+= XFASTINT (w
->top
);
3254 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3259 /* Translate horizontal position HPOS which is relative to window W to
3260 a vertical position relative to W's frame. */
3263 window_to_frame_hpos (w
, hpos
)
3267 struct frame
*f
= XFRAME (w
->frame
);
3269 xassert (!FRAME_WINDOW_P (f
));
3270 hpos
+= XFASTINT (w
->left
);
3274 #endif /* GLYPH_DEBUG */
3278 /**********************************************************************
3280 **********************************************************************/
3282 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3283 "Clear frame FRAME and output again what is supposed to appear on it.")
3289 CHECK_LIVE_FRAME (frame
, 0);
3292 /* Ignore redraw requests, if frame has no glyphs yet.
3293 (Implementation note: It still has to be checked why we are
3294 called so early here). */
3295 if (!glyphs_initialized_initially_p
)
3299 if (FRAME_MSDOS_P (f
))
3300 set_terminal_modes ();
3302 clear_current_matrices (f
);
3305 windows_or_buffers_changed
++;
3306 /* Mark all windows as inaccurate, so that every window will have
3307 its redisplay done. */
3308 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3309 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3315 /* Redraw frame F. This is nothing more than a call to the Lisp
3316 function redraw-frame. */
3323 XSETFRAME (frame
, f
);
3324 Fredraw_frame (frame
);
3328 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3329 "Clear and redisplay all visible frames.")
3332 Lisp_Object tail
, frame
;
3334 FOR_EACH_FRAME (tail
, frame
)
3335 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3336 Fredraw_frame (frame
);
3342 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3343 visible frames marked as garbaged. */
3346 redraw_garbaged_frames ()
3348 Lisp_Object tail
, frame
;
3350 FOR_EACH_FRAME (tail
, frame
)
3351 if (FRAME_VISIBLE_P (XFRAME (frame
))
3352 && FRAME_GARBAGED_P (XFRAME (frame
)))
3353 Fredraw_frame (frame
);
3358 /***********************************************************************
3360 ***********************************************************************/
3362 /* Try to update display and current glyph matrix directly.
3364 This function is called after a character G has been inserted into
3365 current_buffer. It tries to update the current glyph matrix and
3366 perform appropriate screen output to reflect the insertion. If it
3367 succeeds, the global flag redisplay_performed_directly_p will be
3368 set to 1, and thereby prevent the more costly general redisplay
3369 from running (see redisplay_internal).
3371 This function is not called for `hairy' character insertions.
3372 In particular, it is not called when after or before change
3373 functions exist, like they are used by font-lock. See keyboard.c
3374 for details where this function is called. */
3377 direct_output_for_insert (g
)
3380 register struct frame
*f
= SELECTED_FRAME ();
3381 struct window
*w
= XWINDOW (selected_window
);
3383 struct glyph_row
*glyph_row
;
3384 struct glyph
*glyphs
, *glyph
, *end
;
3386 /* Non-null means that Redisplay of W is based on window matrices. */
3387 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3388 /* Non-null means we are in overwrite mode. */
3389 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3391 struct text_pos pos
;
3392 int delta
, delta_bytes
;
3394 /* Not done directly. */
3395 redisplay_performed_directly_p
= 0;
3397 /* Quickly give up for some common cases. */
3398 if (cursor_in_echo_area
3399 /* Give up if fonts have changed. */
3401 /* Give up if face attributes have been changed. */
3402 || face_change_count
3403 /* Give up if cursor position not really known. */
3404 || !display_completed
3405 /* Give up if buffer appears in two places. */
3406 || buffer_shared
> 1
3407 /* Give up if currently displaying a message instead of the
3408 minibuffer contents. */
3409 || (EQ (selected_window
, minibuf_window
)
3410 && EQ (minibuf_window
, echo_area_window
))
3411 /* Give up for hscrolled mini-buffer because display of the prompt
3412 is handled specially there (see display_line). */
3413 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3414 /* Give up if overwriting in the middle of a line. */
3417 && FETCH_BYTE (PT
) != '\n')
3418 /* Give up for tabs and line ends. */
3422 /* Give up if unable to display the cursor in the window. */
3423 || w
->cursor
.vpos
< 0
3424 /* Give up if we are showing a message or just cleared the message
3425 because we might need to resize the echo area window. */
3426 || !NILP (echo_area_buffer
[0])
3427 || !NILP (echo_area_buffer
[1])
3428 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3429 /* Can't do it in a continued line because continuation
3430 lines would change. */
3431 (glyph_row
->continued_p
3432 /* Can't use this method if the line overlaps others or is
3433 overlapped by others because these other lines would
3434 have to be redisplayed. */
3435 || glyph_row
->overlapping_p
3436 || glyph_row
->overlapped_p
))
3437 /* Can't do it for partial width windows on terminal frames
3438 because we can't clear to eol in such a window. */
3439 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3442 /* If we can't insert glyphs, we can use this method only
3443 at the end of a line. */
3444 if (!char_ins_del_ok
)
3445 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3448 /* Set up a display iterator structure for W. Glyphs will be
3449 produced in scratch_glyph_row. Current position is W's cursor
3451 clear_glyph_row (&scratch_glyph_row
);
3452 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3453 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3454 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3457 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3458 if (glyph_row
->mouse_face_p
)
3461 /* Give up if highlighting trailing whitespace and we have trailing
3462 whitespace in glyph_row. We would have to remove the trailing
3463 whitespace face in that case. */
3464 if (!NILP (Vshow_trailing_whitespace
)
3465 && glyph_row
->used
[TEXT_AREA
])
3469 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3470 if (last
->type
== STRETCH_GLYPH
3471 || (last
->type
== CHAR_GLYPH
3472 && last
->u
.ch
== ' '))
3476 /* Give up if there are overlay strings at pos. This would fail
3477 if the overlay string has newlines in it. */
3478 if (STRINGP (it
.string
))
3481 it
.hpos
= w
->cursor
.hpos
;
3482 it
.vpos
= w
->cursor
.vpos
;
3483 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3484 it
.current_y
= w
->cursor
.y
;
3485 it
.end_charpos
= PT
;
3486 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3488 /* More than one display element may be returned for PT - 1 if
3489 (i) it's a control character which is translated into `\003' or
3490 `^C', or (ii) it has a display table entry, or (iii) it's a
3491 combination of both. */
3492 delta
= delta_bytes
= 0;
3493 while (get_next_display_element (&it
))
3495 PRODUCE_GLYPHS (&it
);
3497 /* Give up if glyph doesn't fit completely on the line. */
3498 if (it
.current_x
>= it
.last_visible_x
)
3501 /* Give up if new glyph has different ascent or descent than
3502 the original row, or if it is not a character glyph. */
3503 if (glyph_row
->ascent
!= it
.ascent
3504 || glyph_row
->height
!= it
.ascent
+ it
.descent
3505 || glyph_row
->phys_ascent
!= it
.phys_ascent
3506 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3507 || it
.what
!= IT_CHARACTER
)
3511 delta_bytes
+= it
.len
;
3512 set_iterator_to_next (&it
, 1);
3515 /* Give up if we hit the right edge of the window. We would have
3516 to insert truncation or continuation glyphs. */
3517 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3518 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3521 /* Give up if there is a \t following in the line. */
3523 it2
.end_charpos
= ZV
;
3524 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3525 while (get_next_display_element (&it2
)
3526 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3530 set_iterator_to_next (&it2
, 1);
3533 /* Number of new glyphs produced. */
3534 n
= it
.glyph_row
->used
[TEXT_AREA
];
3536 /* Start and end of glyphs in original row. */
3537 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3538 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3540 /* Make room for new glyphs, then insert them. */
3541 xassert (end
- glyphs
- n
>= 0);
3542 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3543 (end
- glyphs
- n
) * sizeof (*end
));
3544 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3545 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3546 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3548 /* Compute new line width. */
3549 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3550 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3551 glyph_row
->pixel_width
= glyph_row
->x
;
3554 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3558 /* Increment buffer positions for glyphs following the newly
3560 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3561 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3562 glyph
->charpos
+= delta
;
3564 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3566 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3567 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3570 /* Adjust positions in lines following the one we are in. */
3571 increment_matrix_positions (w
->current_matrix
,
3573 w
->current_matrix
->nrows
,
3574 delta
, delta_bytes
);
3576 glyph_row
->contains_overlapping_glyphs_p
3577 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3579 glyph_row
->displays_text_p
= 1;
3580 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3581 XFASTINT (w
->window_end_vpos
)));
3583 if (!NILP (Vshow_trailing_whitespace
))
3584 highlight_trailing_whitespace (it
.f
, glyph_row
);
3586 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3587 In the middle, we have to insert glyphs. Note that this is now
3588 implemented for X frames. The implementation uses updated_window
3590 updated_row
= glyph_row
;
3594 rif
->update_window_begin_hook (w
);
3596 if (glyphs
== end
- n
3597 /* In front of a space added by append_space. */
3598 || (glyphs
== end
- n
- 1
3599 && (end
- n
)->charpos
<= 0))
3600 rif
->write_glyphs (glyphs
, n
);
3602 rif
->insert_glyphs (glyphs
, n
);
3606 if (glyphs
== end
- n
)
3607 write_glyphs (glyphs
, n
);
3609 insert_glyphs (glyphs
, n
);
3612 w
->cursor
.hpos
+= n
;
3613 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3614 xassert (w
->cursor
.hpos
>= 0
3615 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3617 /* How to set the cursor differs depending on whether we are
3618 using a frame matrix or a window matrix. Note that when
3619 a frame matrix is used, cursor_to expects frame coordinates,
3620 and the X and Y parameters are not used. */
3621 if (window_redisplay_p
)
3622 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3623 w
->cursor
.y
, w
->cursor
.x
);
3627 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3628 + (INTEGERP (w
->left_margin_width
)
3629 ? XFASTINT (w
->left_margin_width
)
3631 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3636 rif
->update_window_end_hook (w
, 1, 0);
3641 TRACE ((stderr
, "direct output for insert\n"));
3643 UNCHANGED_MODIFIED
= MODIFF
;
3644 BEG_UNCHANGED
= GPT
- BEG
;
3645 XSETFASTINT (w
->last_point
, PT
);
3646 w
->last_cursor
= w
->cursor
;
3647 XSETFASTINT (w
->last_modified
, MODIFF
);
3648 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3650 redisplay_performed_directly_p
= 1;
3655 /* Perform a direct display update for moving PT by N positions
3656 left or right. N < 0 means a movement backwards. This function
3657 is currently only called for N == 1 or N == -1. */
3660 direct_output_forward_char (n
)
3663 struct frame
*f
= SELECTED_FRAME ();
3664 struct window
*w
= XWINDOW (selected_window
);
3665 struct glyph_row
*row
;
3667 /* Give up if point moved out of or into a composition. */
3668 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3669 current_buffer
, PT
))
3672 /* Give up if face attributes have been changed. */
3673 if (face_change_count
)
3676 /* Give up if current matrix is not up to date or we are
3677 displaying a message. */
3678 if (!display_completed
|| cursor_in_echo_area
)
3681 /* Give up if the buffer's direction is reversed. */
3682 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3685 /* Can't use direct output if highlighting a region. */
3686 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3689 /* Can't use direct output if highlighting trailing whitespace. */
3690 if (!NILP (Vshow_trailing_whitespace
))
3693 /* Give up if we are showing a message or just cleared the message
3694 because we might need to resize the echo area window. */
3695 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3698 /* Give up if currently displaying a message instead of the
3699 minibuffer contents. */
3700 if (XWINDOW (minibuf_window
) == w
3701 && EQ (minibuf_window
, echo_area_window
))
3704 /* Give up if we don't know where the cursor is. */
3705 if (w
->cursor
.vpos
< 0)
3708 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3710 /* Give up if PT is outside of the last known cursor row. */
3711 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3712 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3715 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3717 w
->last_cursor
= w
->cursor
;
3718 XSETFASTINT (w
->last_point
, PT
);
3720 xassert (w
->cursor
.hpos
>= 0
3721 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3723 if (FRAME_WINDOW_P (f
))
3724 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3725 w
->cursor
.y
, w
->cursor
.x
);
3729 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3730 + (INTEGERP (w
->left_margin_width
)
3731 ? XFASTINT (w
->left_margin_width
)
3733 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3738 redisplay_performed_directly_p
= 1;
3744 /***********************************************************************
3746 ***********************************************************************/
3748 /* Update frame F based on the data in desired matrices.
3750 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3751 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3754 Value is non-zero if redisplay was stopped due to pending input. */
3757 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3760 int inhibit_hairy_id_p
;
3762 /* 1 means display has been paused because of pending input. */
3764 struct window
*root_window
= XWINDOW (f
->root_window
);
3766 if (FRAME_WINDOW_P (f
))
3768 /* We are working on window matrix basis. All windows whose
3769 flag must_be_updated_p is set have to be updated. */
3771 /* Record that we are not working on frame matrices. */
3772 set_frame_matrix_frame (NULL
);
3774 /* Update all windows in the window tree of F, maybe stopping
3775 when pending input is detected. */
3778 /* Update the menu bar on X frames that don't have toolkit
3780 if (WINDOWP (f
->menu_bar_window
))
3781 update_window (XWINDOW (f
->menu_bar_window
), 1);
3783 /* Update the tool-bar window, if present. */
3784 if (WINDOWP (f
->tool_bar_window
))
3787 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3789 /* Update tool-bar window. */
3790 if (w
->must_be_updated_p
)
3792 update_window (w
, 1);
3793 w
->must_be_updated_p
= 0;
3795 /* Swap tool-bar strings. We swap because we want to
3797 tem
= f
->current_tool_bar_string
;
3798 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3799 f
->desired_tool_bar_string
= tem
;
3804 /* Update windows. */
3805 paused_p
= update_window_tree (root_window
, force_p
);
3808 #if 0 /* This flush is a performance bottleneck under X,
3809 and it doesn't seem to be necessary anyway. */
3810 rif
->flush_display (f
);
3815 /* We are working on frame matrix basis. Set the frame on whose
3816 frame matrix we operate. */
3817 set_frame_matrix_frame (f
);
3819 /* Build F's desired matrix from window matrices. */
3820 build_frame_matrix (f
);
3822 /* Update the display */
3824 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3828 fflush (termscript
);
3831 /* Check window matrices for lost pointers. */
3833 check_window_matrix_pointers (root_window
);
3834 add_frame_display_history (f
, paused_p
);
3838 /* Reset flags indicating that a window should be updated. */
3839 set_window_update_flags (root_window
, 0);
3841 display_completed
= !paused_p
;
3847 /************************************************************************
3848 Window-based updates
3849 ************************************************************************/
3851 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3852 don't stop updating when input is pending. */
3855 update_window_tree (w
, force_p
)
3861 while (w
&& !paused_p
)
3863 if (!NILP (w
->hchild
))
3864 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3865 else if (!NILP (w
->vchild
))
3866 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3867 else if (w
->must_be_updated_p
)
3868 paused_p
|= update_window (w
, force_p
);
3870 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3877 /* Update window W if its flag must_be_updated_p is non-zero. If
3878 FORCE_P is non-zero, don't stop updating if input is pending. */
3881 update_single_window (w
, force_p
)
3885 if (w
->must_be_updated_p
)
3887 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3889 /* Record that this is not a frame-based redisplay. */
3890 set_frame_matrix_frame (NULL
);
3894 update_window (w
, force_p
);
3897 /* Reset flag in W. */
3898 w
->must_be_updated_p
= 0;
3903 /* Redraw lines from the current matrix of window W that are
3904 overlapped by other rows. YB is bottom-most y-position in W. */
3907 redraw_overlapped_rows (w
, yb
)
3913 /* If rows overlapping others have been changed, the rows being
3914 overlapped have to be redrawn. This won't draw lines that have
3915 already been drawn in update_window_line because overlapped_p in
3916 desired rows is 0, so after row assignment overlapped_p in
3917 current rows is 0. */
3918 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3920 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3922 if (!row
->enabled_p
)
3924 else if (row
->mode_line_p
)
3927 if (row
->overlapped_p
)
3929 enum glyph_row_area area
;
3931 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3934 updated_area
= area
;
3935 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3936 if (row
->used
[area
])
3937 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3938 rif
->clear_end_of_line (-1);
3941 row
->overlapped_p
= 0;
3944 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3950 /* Redraw lines from the current matrix of window W that overlap
3951 others. YB is bottom-most y-position in W. */
3954 redraw_overlapping_rows (w
, yb
)
3959 struct glyph_row
*row
;
3961 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3963 row
= w
->current_matrix
->rows
+ i
;
3965 if (!row
->enabled_p
)
3967 else if (row
->mode_line_p
)
3970 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3972 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3974 if (row
->used
[LEFT_MARGIN_AREA
])
3975 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3977 if (row
->used
[TEXT_AREA
])
3978 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3980 if (row
->used
[RIGHT_MARGIN_AREA
])
3981 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3983 /* Record in neighbor rows that ROW overwrites part of their
3985 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3986 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3987 if ((row
->phys_height
- row
->phys_ascent
3988 > row
->height
- row
->ascent
)
3990 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4001 /* Check that no row in the current matrix of window W is enabled
4002 which is below what's displayed in the window. */
4005 check_current_matrix_flags (w
)
4008 int last_seen_p
= 0;
4009 int i
, yb
= window_text_bottom_y (w
);
4011 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4013 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4014 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4016 else if (last_seen_p
&& row
->enabled_p
)
4021 #endif /* GLYPH_DEBUG */
4024 /* Update display of window W. FORCE_P non-zero means that we should
4025 not stop when detecting pending input. */
4028 update_window (w
, force_p
)
4032 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4034 int preempt_count
= baud_rate
/ 2400 + 1;
4035 extern int input_pending
;
4036 extern Lisp_Object do_mouse_tracking
;
4038 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4039 extern struct frame
*updating_frame
;
4042 /* Check that W's frame doesn't have glyph matrices. */
4043 xassert (FRAME_WINDOW_P (f
));
4044 xassert (updating_frame
!= NULL
);
4046 /* Check pending input the first time so that we can quickly return. */
4047 if (redisplay_dont_pause
)
4050 detect_input_pending ();
4052 /* If forced to complete the update, or if no input is pending, do
4054 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4056 struct glyph_row
*row
, *end
;
4057 struct glyph_row
*mode_line_row
;
4058 struct glyph_row
*header_line_row
;
4059 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4061 rif
->update_window_begin_hook (w
);
4062 yb
= window_text_bottom_y (w
);
4064 /* If window has a top line, update it before everything else.
4065 Adjust y-positions of other rows by the top line height. */
4066 row
= desired_matrix
->rows
;
4067 end
= row
+ desired_matrix
->nrows
- 1;
4069 if (row
->mode_line_p
)
4071 header_line_row
= row
;
4075 header_line_row
= NULL
;
4077 /* Update the mode line, if necessary. */
4078 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4079 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4081 mode_line_row
->y
= yb
;
4082 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4084 &mouse_face_overwritten_p
);
4088 /* Find first enabled row. Optimizations in redisplay_internal
4089 may lead to an update with only one row enabled. There may
4090 be also completely empty matrices. */
4091 while (row
< end
&& !row
->enabled_p
)
4094 /* Try reusing part of the display by copying. */
4095 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4097 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4100 /* All rows were found to be equal. */
4105 /* We've scrolled the display. */
4110 /* Update the top mode line after scrolling because a new top
4111 line would otherwise overwrite lines at the top of the window
4112 that can be scrolled. */
4113 if (header_line_row
&& header_line_row
->enabled_p
)
4115 header_line_row
->y
= 0;
4116 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4120 /* Update the rest of the lines. */
4121 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4124 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4127 /* We'll Have to play a little bit with when to
4128 detect_input_pending. If it's done too often,
4129 scrolling large windows with repeated scroll-up
4130 commands will too quickly pause redisplay. */
4131 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4132 detect_input_pending ();
4134 changed_p
|= update_window_line (w
, vpos
,
4135 &mouse_face_overwritten_p
);
4137 /* Mark all rows below the last visible one in the current
4138 matrix as invalid. This is necessary because of
4139 variable line heights. Consider the case of three
4140 successive redisplays, where the first displays 5
4141 lines, the second 3 lines, and the third 5 lines again.
4142 If the second redisplay wouldn't mark rows in the
4143 current matrix invalid, the third redisplay might be
4144 tempted to optimize redisplay based on lines displayed
4145 in the first redisplay. */
4146 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4147 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4148 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4151 /* Was display preempted? */
4152 paused_p
= row
< end
;
4156 /* Fix the appearance of overlapping(overlapped rows. */
4157 if (!paused_p
&& !w
->pseudo_window_p
)
4159 if (changed_p
&& rif
->fix_overlapping_area
)
4161 redraw_overlapped_rows (w
, yb
);
4162 redraw_overlapping_rows (w
, yb
);
4165 /* Make cursor visible at cursor position of W. */
4166 set_window_cursor_after_update (w
);
4168 #if 0 /* Check that current matrix invariants are satisfied. This is
4169 for debugging only. See the comment of check_matrix_invariants. */
4170 IF_DEBUG (check_matrix_invariants (w
));
4175 /* Remember the redisplay method used to display the matrix. */
4176 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4179 /* End the update of window W. Don't set the cursor if we
4180 paused updating the display because in this case,
4181 set_window_cursor_after_update hasn't been called, and
4182 output_cursor doesn't contain the cursor location. */
4183 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4189 /* check_current_matrix_flags (w); */
4190 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4193 clear_glyph_matrix (desired_matrix
);
4199 /* Update the display of area AREA in window W, row number VPOS.
4200 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4203 update_marginal_area (w
, area
, vpos
)
4207 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4209 /* Let functions in xterm.c know what area subsequent X positions
4210 will be relative to. */
4211 updated_area
= area
;
4213 /* Set cursor to start of glyphs, write them, and clear to the end
4214 of the area. I don't think that something more sophisticated is
4215 necessary here, since marginal areas will not be the default. */
4216 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4217 if (desired_row
->used
[area
])
4218 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4219 rif
->clear_end_of_line (-1);
4223 /* Update the display of the text area of row VPOS in window W.
4224 Value is non-zero if display has changed. */
4227 update_text_area (w
, vpos
)
4231 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4232 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4235 /* Let functions in xterm.c know what area subsequent X positions
4236 will be relative to. */
4237 updated_area
= TEXT_AREA
;
4239 /* If rows are at different X or Y, or rows have different height,
4240 or the current row is marked invalid, write the entire line. */
4241 if (!current_row
->enabled_p
4242 || desired_row
->y
!= current_row
->y
4243 || desired_row
->ascent
!= current_row
->ascent
4244 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4245 || desired_row
->phys_height
!= current_row
->phys_height
4246 || desired_row
->visible_height
!= current_row
->visible_height
4247 || current_row
->overlapped_p
4248 || current_row
->mouse_face_p
4249 || current_row
->x
!= desired_row
->x
)
4251 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4253 if (desired_row
->used
[TEXT_AREA
])
4254 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4255 desired_row
->used
[TEXT_AREA
]);
4257 /* Clear to end of window. */
4258 rif
->clear_end_of_line (-1);
4264 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4265 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4266 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4267 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4269 /* If the desired row extends its face to the text area end,
4270 make sure we write at least one glyph, so that the face
4271 extension actually takes place. */
4272 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4275 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4279 /* Loop over glyphs that current and desired row may have
4285 /* Skip over glyphs that both rows have in common. These
4286 don't have to be written. We can't skip if the last
4287 current glyph overlaps the glyph to its right. For
4288 example, consider a current row of `if ' with the `f' in
4289 Courier bold so that it overlaps the ` ' to its right.
4290 If the desired row is ` ', we would skip over the space
4291 after the `if' and there would remain a pixel from the
4292 `f' on the screen. */
4293 if (overlapping_glyphs_p
&& i
> 0)
4295 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4298 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4300 can_skip_p
= right
== 0;
4306 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4308 x
+= desired_glyph
->pixel_width
;
4309 ++desired_glyph
, ++current_glyph
, ++i
;
4312 /* Consider the case that the current row contains "xxx
4313 ppp ggg" in italic Courier font, and the desired row
4314 is "xxx ggg". The character `p' has lbearing, `g'
4315 has not. The loop above will stop in front of the
4316 first `p' in the current row. If we would start
4317 writing glyphs there, we wouldn't erase the lbearing
4318 of the `p'. The rest of the lbearing problem is then
4319 taken care of by x_draw_glyphs. */
4320 if (overlapping_glyphs_p
4322 && i
< current_row
->used
[TEXT_AREA
]
4323 && (current_row
->used
[TEXT_AREA
]
4324 != desired_row
->used
[TEXT_AREA
]))
4328 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4330 while (left
> 0 && i
> 0)
4332 --i
, --desired_glyph
, --current_glyph
;
4333 x
-= desired_glyph
->pixel_width
;
4334 left
-= desired_glyph
->pixel_width
;
4339 /* Try to avoid writing the entire rest of the desired row
4340 by looking for a resync point. This mainly prevents
4341 mode line flickering in the case the mode line is in
4342 fixed-pitch font, which it usually will be. */
4343 if (i
< desired_row
->used
[TEXT_AREA
])
4345 int start_x
= x
, start_hpos
= i
;
4346 struct glyph
*start
= desired_glyph
;
4348 int skip_first_p
= !can_skip_p
;
4350 /* Find the next glyph that's equal again. */
4353 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4356 x
+= desired_glyph
->pixel_width
;
4357 current_x
+= current_glyph
->pixel_width
;
4358 ++desired_glyph
, ++current_glyph
, ++i
;
4362 if (i
== start_hpos
|| x
!= current_x
)
4366 desired_glyph
= start
;
4370 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4371 rif
->write_glyphs (start
, i
- start_hpos
);
4376 /* Write the rest. */
4377 if (i
< desired_row
->used
[TEXT_AREA
])
4379 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4380 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4384 /* Maybe clear to end of line. */
4385 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4387 /* If new row extends to the end of the text area, nothing
4388 has to be cleared, if and only if we did a write_glyphs
4389 above. This is made sure by setting desired_stop_pos
4390 appropriately above. */
4391 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4393 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4395 /* If old row extends to the end of the text area, clear. */
4396 if (i
>= desired_row
->used
[TEXT_AREA
])
4397 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4398 desired_row
->x
+ desired_row
->pixel_width
);
4399 rif
->clear_end_of_line (-1);
4402 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4404 /* Otherwise clear to the end of the old row. Everything
4405 after that position should be clear already. */
4408 if (i
>= desired_row
->used
[TEXT_AREA
])
4409 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4410 desired_row
->x
+ desired_row
->pixel_width
);
4412 /* If cursor is displayed at the end of the line, make sure
4413 it's cleared. Nowadays we don't have a phys_cursor_glyph
4414 with which to erase the cursor (because this method
4415 doesn't work with lbearing/rbearing), so we must do it
4417 if (vpos
== w
->phys_cursor
.vpos
4418 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4420 w
->phys_cursor_on_p
= 0;
4424 x
= current_row
->x
+ current_row
->pixel_width
;
4425 rif
->clear_end_of_line (x
);
4434 /* Update row VPOS in window W. Value is non-zero if display has been
4438 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4440 int vpos
, *mouse_face_overwritten_p
;
4442 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4443 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4446 /* Set the row being updated. This is important to let xterm.c
4447 know what line height values are in effect. */
4448 updated_row
= desired_row
;
4450 /* A row can be completely invisible in case a desired matrix was
4451 built with a vscroll and then make_cursor_line_fully_visible shifts
4452 the matrix. Make sure to make such rows current anyway, since
4453 we need the correct y-position, for example, in the current matrix. */
4454 if (desired_row
->mode_line_p
4455 || desired_row
->visible_height
> 0)
4457 xassert (desired_row
->enabled_p
);
4459 /* Update display of the left margin area, if there is one. */
4460 if (!desired_row
->full_width_p
4461 && !NILP (w
->left_margin_width
))
4464 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4467 /* Update the display of the text area. */
4468 if (update_text_area (w
, vpos
))
4471 if (current_row
->mouse_face_p
)
4472 *mouse_face_overwritten_p
= 1;
4475 /* Update display of the right margin area, if there is one. */
4476 if (!desired_row
->full_width_p
4477 && !NILP (w
->right_margin_width
))
4480 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4483 /* Draw truncation marks etc. */
4484 if (!current_row
->enabled_p
4485 || desired_row
->y
!= current_row
->y
4486 || desired_row
->visible_height
!= current_row
->visible_height
4487 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4488 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4489 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4490 || desired_row
->continued_p
!= current_row
->continued_p
4491 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4492 || (desired_row
->indicate_empty_line_p
4493 != current_row
->indicate_empty_line_p
)
4494 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4495 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4496 rif
->after_update_window_line_hook (desired_row
);
4499 /* Update current_row from desired_row. */
4500 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4506 /* Set the cursor after an update of window W. This function may only
4507 be called from update_window. */
4510 set_window_cursor_after_update (w
)
4513 struct frame
*f
= XFRAME (w
->frame
);
4514 int cx
, cy
, vpos
, hpos
;
4516 /* Not intended for frame matrix updates. */
4517 xassert (FRAME_WINDOW_P (f
));
4519 if (cursor_in_echo_area
4520 && !NILP (echo_area_buffer
[0])
4521 /* If we are showing a message instead of the mini-buffer,
4522 show the cursor for the message instead. */
4523 && XWINDOW (minibuf_window
) == w
4524 && EQ (minibuf_window
, echo_area_window
)
4525 /* These cases apply only to the frame that contains
4526 the active mini-buffer window. */
4527 && FRAME_HAS_MINIBUF_P (f
)
4528 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4530 cx
= cy
= vpos
= hpos
= 0;
4532 if (cursor_in_echo_area
>= 0)
4534 /* If the mini-buffer is several lines high, find the last
4535 line that has any text on it. Note: either all lines
4536 are enabled or none. Otherwise we wouldn't be able to
4538 struct glyph_row
*row
, *last_row
;
4539 struct glyph
*glyph
;
4540 int yb
= window_text_bottom_y (w
);
4543 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4547 if (row
->used
[TEXT_AREA
]
4548 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4551 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4557 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4558 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4560 while (last
> start
&& last
->charpos
< 0)
4563 for (glyph
= start
; glyph
< last
; ++glyph
)
4565 cx
+= glyph
->pixel_width
;
4570 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4578 hpos
= w
->cursor
.hpos
;
4579 vpos
= w
->cursor
.vpos
;
4582 /* Window cursor can be out of sync for horizontally split windows. */
4583 hpos
= max (0, hpos
);
4584 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4585 vpos
= max (0, vpos
);
4586 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4587 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4591 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4592 tree rooted at W. */
4595 set_window_update_flags (w
, on_p
)
4601 if (!NILP (w
->hchild
))
4602 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4603 else if (!NILP (w
->vchild
))
4604 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4606 w
->must_be_updated_p
= on_p
;
4608 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4614 /***********************************************************************
4615 Window-Based Scrolling
4616 ***********************************************************************/
4618 /* Structure describing rows in scrolling_window. */
4622 /* Number of occurrences of this row in desired and current matrix. */
4623 int old_uses
, new_uses
;
4625 /* Vpos of row in new matrix. */
4626 int new_line_number
;
4628 /* Bucket index of this row_entry in the hash table row_table. */
4631 /* The row described by this entry. */
4632 struct glyph_row
*row
;
4634 /* Hash collision chain. */
4635 struct row_entry
*next
;
4638 /* A pool to allocate row_entry structures from, and the size of the
4639 pool. The pool is reallocated in scrolling_window when we find
4640 that we need a larger one. */
4642 static struct row_entry
*row_entry_pool
;
4643 static int row_entry_pool_size
;
4645 /* Index of next free entry in row_entry_pool. */
4647 static int row_entry_idx
;
4649 /* The hash table used during scrolling, and the table's size. This
4650 table is used to quickly identify equal rows in the desired and
4653 static struct row_entry
**row_table
;
4654 static int row_table_size
;
4656 /* Vectors of pointers to row_entry structures belonging to the
4657 current and desired matrix, and the size of the vectors. */
4659 static struct row_entry
**old_lines
, **new_lines
;
4660 static int old_lines_size
, new_lines_size
;
4662 /* A pool to allocate run structures from, and its size. */
4664 static struct run
*run_pool
;
4665 static int runs_size
;
4667 /* A vector of runs of lines found during scrolling. */
4669 static struct run
**runs
;
4671 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4672 struct glyph_row
*));
4675 /* Add glyph row ROW to the scrolling hash table during the scrolling
4678 static INLINE
struct row_entry
*
4679 add_row_entry (w
, row
)
4681 struct glyph_row
*row
;
4683 struct row_entry
*entry
;
4684 int i
= row
->hash
% row_table_size
;
4686 entry
= row_table
[i
];
4687 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4688 entry
= entry
->next
;
4692 entry
= row_entry_pool
+ row_entry_idx
++;
4694 entry
->old_uses
= entry
->new_uses
= 0;
4695 entry
->new_line_number
= 0;
4697 entry
->next
= row_table
[i
];
4698 row_table
[i
] = entry
;
4705 /* Try to reuse part of the current display of W by scrolling lines.
4706 HEADER_LINE_P non-zero means W has a top mode line.
4708 The algorithm is taken from Communications of the ACM, Apr78 "A
4709 Technique for Isolating Differences Between Files." It should take
4712 A short outline of the steps of the algorithm
4714 1. Skip lines equal at the start and end of both matrices.
4716 2. Enter rows in the current and desired matrix into a symbol
4717 table, counting how often they appear in both matrices.
4719 3. Rows that appear exactly once in both matrices serve as anchors,
4720 i.e. we assume that such lines are likely to have been moved.
4722 4. Starting from anchor lines, extend regions to be scrolled both
4723 forward and backward.
4727 -1 if all rows were found to be equal.
4728 0 to indicate that we did not scroll the display, or
4729 1 if we did scroll. */
4732 scrolling_window (w
, header_line_p
)
4736 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4737 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4738 int yb
= window_text_bottom_y (w
);
4739 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4740 int nruns
, nbytes
, n
, run_idx
;
4741 struct row_entry
*entry
;
4743 /* Skip over rows equal at the start. */
4744 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4746 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4747 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4752 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4753 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4754 && row_equal_p (w
, c
, d
, 1))
4763 /* Give up if some rows in the desired matrix are not enabled. */
4764 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4767 first_old
= first_new
= i
;
4769 /* Set last_new to the index + 1 of the last enabled row in the
4772 while (i
< desired_matrix
->nrows
- 1
4773 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4774 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4777 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4782 /* Set last_old to the index + 1 of the last enabled row in the
4783 current matrix. We don't look at the enabled flag here because
4784 we plan to reuse part of the display even if other parts are
4787 while (i
< current_matrix
->nrows
- 1)
4789 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4798 /* Skip over rows equal at the bottom. */
4801 while (i
- 1 > first_new
4802 && j
- 1 > first_old
4803 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4804 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4805 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4807 MATRIX_ROW (desired_matrix
, i
- 1),
4808 MATRIX_ROW (current_matrix
, j
- 1), 1))
4813 /* Nothing to do if all rows are equal. */
4814 if (last_new
== first_new
)
4817 /* Reallocate vectors, tables etc. if necessary. */
4819 if (current_matrix
->nrows
> old_lines_size
)
4821 old_lines_size
= current_matrix
->nrows
;
4822 nbytes
= old_lines_size
* sizeof *old_lines
;
4823 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4826 if (desired_matrix
->nrows
> new_lines_size
)
4828 new_lines_size
= desired_matrix
->nrows
;
4829 nbytes
= new_lines_size
* sizeof *new_lines
;
4830 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4833 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4834 if (3 * n
> row_table_size
)
4836 row_table_size
= next_almost_prime (3 * n
);
4837 nbytes
= row_table_size
* sizeof *row_table
;
4838 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4839 bzero (row_table
, nbytes
);
4842 if (n
> row_entry_pool_size
)
4844 row_entry_pool_size
= n
;
4845 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4846 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4849 if (desired_matrix
->nrows
> runs_size
)
4851 runs_size
= desired_matrix
->nrows
;
4852 nbytes
= runs_size
* sizeof *runs
;
4853 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4854 nbytes
= runs_size
* sizeof *run_pool
;
4855 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4858 nruns
= run_idx
= 0;
4861 /* Add rows from the current and desired matrix to the hash table
4862 row_hash_table to be able to find equal ones quickly. */
4864 for (i
= first_old
; i
< last_old
; ++i
)
4866 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4868 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4869 old_lines
[i
] = entry
;
4873 old_lines
[i
] = NULL
;
4876 for (i
= first_new
; i
< last_new
; ++i
)
4878 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4879 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4881 entry
->new_line_number
= i
;
4882 new_lines
[i
] = entry
;
4885 /* Identify moves based on lines that are unique and equal
4886 in both matrices. */
4887 for (i
= first_old
; i
< last_old
;)
4889 && old_lines
[i
]->old_uses
== 1
4890 && old_lines
[i
]->new_uses
== 1)
4893 int new_line
= old_lines
[i
]->new_line_number
;
4894 struct run
*run
= run_pool
+ run_idx
++;
4897 run
->current_vpos
= i
;
4898 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4899 run
->desired_vpos
= new_line
;
4900 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4902 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4904 /* Extend backward. */
4907 while (j
> first_old
4909 && old_lines
[j
] == new_lines
[k
])
4911 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4912 --run
->current_vpos
;
4913 --run
->desired_vpos
;
4916 run
->desired_y
-= h
;
4917 run
->current_y
-= h
;
4921 /* Extend forward. */
4926 && old_lines
[j
] == new_lines
[k
])
4928 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4934 /* Insert run into list of all runs. Order runs by copied
4935 pixel lines. Note that we record runs that don't have to
4936 be copied because they are already in place. This is done
4937 because we can avoid calling update_window_line in this
4939 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4941 for (k
= nruns
; k
> j
; --k
)
4942 runs
[k
] = runs
[k
- 1];
4951 /* Do the moves. Do it in a way that we don't overwrite something
4952 we want to copy later on. This is not solvable in general
4953 because there is only one display and we don't have a way to
4954 exchange areas on this display. Example:
4956 +-----------+ +-----------+
4958 +-----------+ --> +-----------+
4960 +-----------+ +-----------+
4962 Instead, prefer bigger moves, and invalidate moves that would
4963 copy from where we copied to. */
4965 for (i
= 0; i
< nruns
; ++i
)
4966 if (runs
[i
]->nrows
> 0)
4968 struct run
*r
= runs
[i
];
4970 /* Copy on the display. */
4971 if (r
->current_y
!= r
->desired_y
)
4973 rif
->scroll_run_hook (w
, r
);
4975 /* Invalidate runs that copy from where we copied to. */
4976 for (j
= i
+ 1; j
< nruns
; ++j
)
4978 struct run
*p
= runs
[j
];
4980 if ((p
->current_y
>= r
->desired_y
4981 && p
->current_y
< r
->desired_y
+ r
->height
)
4982 || (p
->current_y
+ p
->height
>= r
->desired_y
4983 && (p
->current_y
+ p
->height
4984 < r
->desired_y
+ r
->height
)))
4989 /* Assign matrix rows. */
4990 for (j
= 0; j
< r
->nrows
; ++j
)
4992 struct glyph_row
*from
, *to
;
4993 int to_overlapped_p
;
4995 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4996 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4997 to_overlapped_p
= to
->overlapped_p
;
4998 assign_row (to
, from
);
4999 to
->enabled_p
= 1, from
->enabled_p
= 0;
5000 to
->overlapped_p
= to_overlapped_p
;
5004 /* Clear the hash table, for the next time. */
5005 for (i
= 0; i
< row_entry_idx
; ++i
)
5006 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5008 /* Value is non-zero to indicate that we scrolled the display. */
5014 /************************************************************************
5016 ************************************************************************/
5018 /* Update the desired frame matrix of frame F.
5020 FORCE_P non-zero means that the update should not be stopped by
5021 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5022 should not be tried.
5024 Value is non-zero if update was stopped due to pending input. */
5027 update_frame_1 (f
, force_p
, inhibit_id_p
)
5032 /* Frame matrices to work on. */
5033 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5034 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5037 int preempt_count
= baud_rate
/ 2400 + 1;
5038 extern int input_pending
;
5040 xassert (current_matrix
&& desired_matrix
);
5042 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5043 calculate_costs (f
);
5045 if (preempt_count
<= 0)
5048 if (redisplay_dont_pause
)
5050 else if (!force_p
&& detect_input_pending ())
5056 /* If we cannot insert/delete lines, it's no use trying it. */
5057 if (!line_ins_del_ok
)
5060 /* See if any of the desired lines are enabled; don't compute for
5061 i/d line if just want cursor motion. */
5062 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5063 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5066 /* Try doing i/d line, if not yet inhibited. */
5067 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5068 force_p
|= scrolling (f
);
5070 /* Update the individual lines as needed. Do bottom line first. */
5071 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5072 update_frame_line (f
, desired_matrix
->nrows
- 1);
5074 /* Now update the rest of the lines. */
5075 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5077 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5079 if (FRAME_TERMCAP_P (f
))
5081 /* Flush out every so many lines.
5082 Also flush out if likely to have more than 1k buffered
5083 otherwise. I'm told that some telnet connections get
5084 really screwed by more than 1k output at once. */
5085 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5087 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5090 if (preempt_count
== 1)
5092 #ifdef EMACS_OUTQSIZE
5093 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5094 /* Probably not a tty. Ignore the error and reset
5095 * the outq count. */
5096 outq
= PENDING_OUTPUT_COUNT (stdout
);
5099 if (baud_rate
<= outq
&& baud_rate
> 0)
5100 sleep (outq
/ baud_rate
);
5105 if ((i
- 1) % preempt_count
== 0)
5106 detect_input_pending ();
5108 update_frame_line (f
, i
);
5112 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5114 /* Now just clean up termcap drivers and set cursor, etc. */
5117 if ((cursor_in_echo_area
5118 /* If we are showing a message instead of the mini-buffer,
5119 show the cursor for the message instead of for the
5120 (now hidden) mini-buffer contents. */
5121 || (EQ (minibuf_window
, selected_window
)
5122 && EQ (minibuf_window
, echo_area_window
)
5123 && !NILP (echo_area_buffer
[0])))
5124 /* These cases apply only to the frame that contains
5125 the active mini-buffer window. */
5126 && FRAME_HAS_MINIBUF_P (f
)
5127 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5129 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5132 if (cursor_in_echo_area
< 0)
5134 /* Negative value of cursor_in_echo_area means put
5135 cursor at beginning of line. */
5141 /* Positive value of cursor_in_echo_area means put
5142 cursor at the end of the prompt. If the mini-buffer
5143 is several lines high, find the last line that has
5145 row
= FRAME_HEIGHT (f
);
5151 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5153 /* Frame rows are filled up with spaces that
5154 must be ignored here. */
5155 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5157 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5158 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5161 && (last
- 1)->charpos
< 0)
5167 while (row
> top
&& col
== 0);
5169 /* Make sure COL is not out of range. */
5170 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5172 /* If we have another row, advance cursor into it. */
5173 if (row
< FRAME_HEIGHT (f
) - 1)
5175 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5178 /* Otherwise move it back in range. */
5180 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5184 cursor_to (row
, col
);
5188 /* We have only one cursor on terminal frames. Use it to
5189 display the cursor of the selected window. */
5190 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5191 if (w
->cursor
.vpos
>= 0
5192 /* The cursor vpos may be temporarily out of bounds
5193 in the following situation: There is one window,
5194 with the cursor in the lower half of it. The window
5195 is split, and a message causes a redisplay before
5196 a new cursor position has been computed. */
5197 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5199 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5200 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5202 if (INTEGERP (w
->left_margin_width
))
5203 x
+= XFASTINT (w
->left_margin_width
);
5205 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5213 clear_desired_matrices (f
);
5218 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5222 struct frame
*frame
;
5224 int unchanged_at_top
, unchanged_at_bottom
;
5227 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5228 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5229 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5230 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5232 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5233 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5234 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5236 if (!current_matrix
)
5239 /* Compute hash codes of all the lines. Also calculate number of
5240 changed lines, number of unchanged lines at the beginning, and
5241 number of unchanged lines at the end. */
5243 unchanged_at_top
= 0;
5244 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5245 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5247 /* Give up on this scrolling if some old lines are not enabled. */
5248 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5250 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5251 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5253 /* This line cannot be redrawn, so don't let scrolling mess it. */
5254 new_hash
[i
] = old_hash
[i
];
5255 #define INFINITY 1000000 /* Taken from scroll.c */
5256 draw_cost
[i
] = INFINITY
;
5260 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5261 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5264 if (old_hash
[i
] != new_hash
[i
])
5267 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5269 else if (i
== unchanged_at_top
)
5271 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5274 /* If changed lines are few, don't allow preemption, don't scroll. */
5275 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5276 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5279 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5280 - unchanged_at_bottom
);
5282 if (scroll_region_ok
)
5283 free_at_end_vpos
-= unchanged_at_bottom
;
5284 else if (memory_below_frame
)
5285 free_at_end_vpos
= -1;
5287 /* If large window, fast terminal and few lines in common between
5288 current frame and desired frame, don't bother with i/d calc. */
5289 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5291 10 * scrolling_max_lines_saved (unchanged_at_top
,
5292 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5293 old_hash
, new_hash
, draw_cost
)))
5296 if (window_size
< 2)
5299 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5300 draw_cost
+ unchanged_at_top
- 1,
5301 old_draw_cost
+ unchanged_at_top
- 1,
5302 old_hash
+ unchanged_at_top
- 1,
5303 new_hash
+ unchanged_at_top
- 1,
5304 free_at_end_vpos
- unchanged_at_top
);
5310 /* Count the number of blanks at the start of the vector of glyphs R
5311 which is LEN glyphs long. */
5314 count_blanks (r
, len
)
5320 for (i
= 0; i
< len
; ++i
)
5321 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5328 /* Count the number of glyphs in common at the start of the glyph
5329 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5330 of STR2. Value is the number of equal glyphs equal at the start. */
5333 count_match (str1
, end1
, str2
, end2
)
5334 struct glyph
*str1
, *end1
, *str2
, *end2
;
5336 struct glyph
*p1
= str1
;
5337 struct glyph
*p2
= str2
;
5341 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5348 /* Char insertion/deletion cost vector, from term.c */
5350 extern int *char_ins_del_vector
;
5351 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5354 /* Perform a frame-based update on line VPOS in frame FRAME. */
5357 update_frame_line (f
, vpos
)
5361 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5363 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5364 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5365 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5366 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5367 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5368 int must_write_whole_line_p
;
5369 int write_spaces_p
= must_write_spaces
;
5370 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5371 != FACE_TTY_DEFAULT_BG_COLOR
);
5373 if (colored_spaces_p
)
5376 if (desired_row
->inverse_p
5377 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5379 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5380 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5381 current_row
->enabled_p
= 0;
5384 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5386 /* Current row not enabled means it has unknown contents. We must
5387 write the whole desired line in that case. */
5388 must_write_whole_line_p
= !current_row
->enabled_p
;
5389 if (must_write_whole_line_p
)
5396 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5397 olen
= current_row
->used
[TEXT_AREA
];
5399 if (!current_row
->inverse_p
)
5401 /* Ignore trailing spaces, if we can. */
5402 if (!write_spaces_p
)
5403 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5408 /* For an inverse-video line, make sure it's filled with
5409 spaces all the way to the frame edge so that the reverse
5410 video extends all the way across. */
5411 while (olen
< FRAME_WIDTH (f
) - 1)
5412 obody
[olen
++] = space_glyph
;
5416 current_row
->enabled_p
= 1;
5417 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5418 current_row
->inverse_p
= desired_row
->inverse_p
;
5420 /* If desired line is empty, just clear the line. */
5421 if (!desired_row
->enabled_p
)
5427 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5428 nlen
= desired_row
->used
[TEXT_AREA
];
5429 nend
= nbody
+ nlen
;
5431 /* If display line has unknown contents, write the whole line. */
5432 if (must_write_whole_line_p
)
5434 /* Ignore spaces at the end, if we can. */
5435 if (!write_spaces_p
)
5436 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5439 /* Write the contents of the desired line. */
5442 cursor_to (vpos
, 0);
5443 write_glyphs (nbody
, nlen
);
5446 /* Don't call clear_end_of_line if we already wrote the whole
5447 line. The cursor will not be at the right margin in that
5448 case but in the line below. */
5449 if (nlen
< FRAME_WINDOW_WIDTH (f
))
5451 cursor_to (vpos
, nlen
);
5452 clear_end_of_line (FRAME_WINDOW_WIDTH (f
));
5455 /* Make sure we are in the right row, otherwise cursor movement
5456 with cmgoto might use `ch' in the wrong row. */
5457 cursor_to (vpos
, 0);
5459 make_current (desired_matrix
, current_matrix
, vpos
);
5463 /* Pretend trailing spaces are not there at all,
5464 unless for one reason or another we must write all spaces. */
5465 if (!desired_row
->inverse_p
)
5467 if (!write_spaces_p
)
5468 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5473 /* For an inverse-video line, give it extra trailing spaces all
5474 the way to the frame edge so that the reverse video extends
5475 all the way across. */
5476 while (nlen
< FRAME_WIDTH (f
) - 1)
5477 nbody
[nlen
++] = space_glyph
;
5480 /* If there's no i/d char, quickly do the best we can without it. */
5481 if (!char_ins_del_ok
)
5485 /* Find the first glyph in desired row that doesn't agree with
5486 a glyph in the current row, and write the rest from there on. */
5487 for (i
= 0; i
< nlen
; i
++)
5489 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5491 /* Find the end of the run of different glyphs. */
5495 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5496 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5499 /* Output this run of non-matching chars. */
5500 cursor_to (vpos
, i
);
5501 write_glyphs (nbody
+ i
, j
- i
);
5504 /* Now find the next non-match. */
5508 /* Clear the rest of the line, or the non-clear part of it. */
5511 cursor_to (vpos
, nlen
);
5512 clear_end_of_line (olen
);
5515 /* Make current row = desired row. */
5516 make_current (desired_matrix
, current_matrix
, vpos
);
5520 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5521 characters in a row. */
5525 /* If current line is blank, skip over initial spaces, if
5526 possible, and write the rest. */
5527 if (write_spaces_p
|| desired_row
->inverse_p
)
5530 nsp
= count_blanks (nbody
, nlen
);
5534 cursor_to (vpos
, nsp
);
5535 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5538 /* Exchange contents between current_frame and new_frame. */
5539 make_current (desired_matrix
, current_matrix
, vpos
);
5543 /* Compute number of leading blanks in old and new contents. */
5544 osp
= count_blanks (obody
, olen
);
5545 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5547 : count_blanks (nbody
, nlen
));
5549 /* Compute number of matching chars starting with first non-blank. */
5550 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5551 nbody
+ nsp
, nbody
+ nlen
);
5553 /* Spaces in new match implicit space past the end of old. */
5554 /* A bug causing this to be a no-op was fixed in 18.29. */
5555 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5558 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5562 /* Avoid doing insert/delete char
5563 just cause number of leading spaces differs
5564 when the following text does not match. */
5565 if (begmatch
== 0 && osp
!= nsp
)
5566 osp
= nsp
= min (osp
, nsp
);
5568 /* Find matching characters at end of line */
5571 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5573 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5578 endmatch
= obody
+ olen
- op1
;
5580 /* tem gets the distance to insert or delete.
5581 endmatch is how many characters we save by doing so.
5584 tem
= (nlen
- nsp
) - (olen
- osp
);
5586 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5589 /* nsp - osp is the distance to insert or delete.
5590 If that is nonzero, begmatch is known to be nonzero also.
5591 begmatch + endmatch is how much we save by doing the ins/del.
5595 && (!char_ins_del_ok
5596 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5600 osp
= nsp
= min (osp
, nsp
);
5603 /* Now go through the line, inserting, writing and
5604 deleting as appropriate. */
5608 cursor_to (vpos
, nsp
);
5609 delete_glyphs (osp
- nsp
);
5613 /* If going to delete chars later in line
5614 and insert earlier in the line,
5615 must delete first to avoid losing data in the insert */
5616 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5618 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5619 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5620 olen
= nlen
- (nsp
- osp
);
5622 cursor_to (vpos
, osp
);
5623 insert_glyphs (0, nsp
- osp
);
5627 tem
= nsp
+ begmatch
+ endmatch
;
5628 if (nlen
!= tem
|| olen
!= tem
)
5630 if (!endmatch
|| nlen
== olen
)
5632 /* If new text being written reaches right margin, there is
5633 no need to do clear-to-eol at the end of this function
5634 (and it would not be safe, since cursor is not going to
5635 be "at the margin" after the text is done). */
5636 if (nlen
== FRAME_WINDOW_WIDTH (f
))
5639 /* Function write_glyphs is prepared to do nothing
5640 if passed a length <= 0. Check it here to avoid
5641 unnecessary cursor movement. */
5644 cursor_to (vpos
, nsp
+ begmatch
);
5645 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5648 else if (nlen
> olen
)
5650 /* Here, we used to have the following simple code:
5651 ----------------------------------------
5652 write_glyphs (nbody + nsp + begmatch, olen - tem);
5653 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5654 ----------------------------------------
5655 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5656 is a padding glyph. */
5657 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5660 cursor_to (vpos
, nsp
+ begmatch
);
5662 /* Calculate columns we can actually overwrite. */
5663 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5665 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5667 /* If we left columns to be overwritten, we must delete them. */
5668 del
= olen
- tem
- out
;
5670 delete_glyphs (del
);
5672 /* At last, we insert columns not yet written out. */
5673 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5676 else if (olen
> nlen
)
5678 cursor_to (vpos
, nsp
+ begmatch
);
5679 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5680 delete_glyphs (olen
- nlen
);
5686 /* If any unerased characters remain after the new line, erase them. */
5689 cursor_to (vpos
, nlen
);
5690 clear_end_of_line (olen
);
5693 /* Exchange contents between current_frame and new_frame. */
5694 make_current (desired_matrix
, current_matrix
, vpos
);
5699 /***********************************************************************
5700 X/Y Position -> Buffer Position
5701 ***********************************************************************/
5703 /* Determine what's under window-relative pixel position (*X, *Y).
5704 Return in *OBJECT the object (string or buffer) that's there.
5705 Return in *POS the position in that object. Adjust *X and *Y
5706 to character boundaries. */
5709 buffer_posn_from_coords (w
, x
, y
, object
, pos
)
5712 Lisp_Object
*object
;
5713 struct display_pos
*pos
;
5716 struct buffer
*old_current_buffer
= current_buffer
;
5717 struct text_pos startp
;
5718 int left_area_width
;
5720 current_buffer
= XBUFFER (w
->buffer
);
5721 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5722 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5723 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5724 start_display (&it
, w
, startp
);
5726 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5727 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5728 MOVE_TO_X
| MOVE_TO_Y
);
5730 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5732 current_buffer
= old_current_buffer
;
5734 *object
= STRINGP (it
.string
) ? it
.string
: w
->buffer
;
5739 /* Value is the string under window-relative coordinates X/Y in the
5740 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5741 means look at the mode line. *CHARPOS is set to the position in
5742 the string returned. */
5745 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5747 int x
, y
, mode_line_p
;
5750 struct glyph_row
*row
;
5751 struct glyph
*glyph
, *end
;
5752 struct frame
*f
= XFRAME (w
->frame
);
5754 Lisp_Object string
= Qnil
;
5757 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5759 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5761 if (row
->mode_line_p
&& row
->enabled_p
)
5763 /* The mode lines are displayed over scroll bars and bitmap
5764 areas, and X is window-relative. Correct X by the scroll bar
5765 and bitmap area width. */
5766 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5767 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5768 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5770 /* Find the glyph under X. If we find one with a string object,
5771 it's the one we were looking for. */
5772 glyph
= row
->glyphs
[TEXT_AREA
];
5773 end
= glyph
+ row
->used
[TEXT_AREA
];
5774 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5775 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5777 string
= glyph
->object
;
5778 *charpos
= glyph
->charpos
;
5787 /***********************************************************************
5788 Changing Frame Sizes
5789 ***********************************************************************/
5794 window_change_signal (signalnum
) /* If we don't have an argument, */
5795 int signalnum
; /* some compilers complain in signal calls. */
5801 int old_errno
= errno
;
5803 get_frame_size (&width
, &height
);
5805 /* The frame size change obviously applies to a termcap-controlled
5806 frame. Find such a frame in the list, and assume it's the only
5807 one (since the redisplay code always writes to stdout, not a
5808 FILE * specified in the frame structure). Record the new size,
5809 but don't reallocate the data structures now. Let that be done
5810 later outside of the signal handler. */
5813 Lisp_Object tail
, frame
;
5815 FOR_EACH_FRAME (tail
, frame
)
5817 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5819 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5825 signal (SIGWINCH
, window_change_signal
);
5828 #endif /* SIGWINCH */
5831 /* Do any change in frame size that was requested by a signal. SAFE
5832 non-zero means this function is called from a place where it is
5833 safe to change frame sizes while a redisplay is in progress. */
5836 do_pending_window_change (safe
)
5839 /* If window_change_signal should have run before, run it now. */
5840 if (redisplaying_p
&& !safe
)
5843 while (delayed_size_change
)
5845 Lisp_Object tail
, frame
;
5847 delayed_size_change
= 0;
5849 FOR_EACH_FRAME (tail
, frame
)
5851 struct frame
*f
= XFRAME (frame
);
5853 int height
= FRAME_NEW_HEIGHT (f
);
5854 int width
= FRAME_NEW_WIDTH (f
);
5856 if (height
!= 0 || width
!= 0)
5857 change_frame_size (f
, height
, width
, 0, 0, safe
);
5863 /* Change the frame height and/or width. Values may be given as zero to
5864 indicate no change is to take place.
5866 If DELAY is non-zero, then assume we're being called from a signal
5867 handler, and queue the change for later - perhaps the next
5868 redisplay. Since this tries to resize windows, we can't call it
5869 from a signal handler.
5871 SAFE non-zero means this function is called from a place where it's
5872 safe to change frame sizes while a redisplay is in progress. */
5875 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5876 register struct frame
*f
;
5877 int newheight
, newwidth
, pretend
, delay
, safe
;
5879 Lisp_Object tail
, frame
;
5881 if (! FRAME_WINDOW_P (f
))
5883 /* When using termcap, or on MS-DOS, all frames use
5884 the same screen, so a change in size affects all frames. */
5885 FOR_EACH_FRAME (tail
, frame
)
5886 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5887 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5888 pretend
, delay
, safe
);
5891 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5895 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5896 register struct frame
*f
;
5897 int newheight
, newwidth
, pretend
, delay
, safe
;
5899 int new_frame_window_width
;
5900 int count
= specpdl_ptr
- specpdl
;
5902 /* If we can't deal with the change now, queue it for later. */
5903 if (delay
|| (redisplaying_p
&& !safe
))
5905 FRAME_NEW_HEIGHT (f
) = newheight
;
5906 FRAME_NEW_WIDTH (f
) = newwidth
;
5907 delayed_size_change
= 1;
5911 /* This size-change overrides any pending one for this frame. */
5912 FRAME_NEW_HEIGHT (f
) = 0;
5913 FRAME_NEW_WIDTH (f
) = 0;
5915 /* If an argument is zero, set it to the current value. */
5917 newheight
= FRAME_HEIGHT (f
);
5919 newwidth
= FRAME_WIDTH (f
);
5921 /* Compute width of windows in F.
5922 This is the width of the frame without vertical scroll bars. */
5923 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5925 /* Round up to the smallest acceptable size. */
5926 check_frame_size (f
, &newheight
, &newwidth
);
5928 /* If we're not changing the frame size, quit now. */
5929 if (newheight
== FRAME_HEIGHT (f
)
5930 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5936 /* We only can set screen dimensions to certain values supported
5937 by our video hardware. Try to find the smallest size greater
5938 or equal to the requested dimensions. */
5939 dos_set_window_size (&newheight
, &newwidth
);
5942 if (newheight
!= FRAME_HEIGHT (f
))
5944 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5946 /* Frame has both root and mini-buffer. */
5947 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5948 FRAME_TOP_MARGIN (f
));
5949 set_window_height (FRAME_ROOT_WINDOW (f
),
5952 - FRAME_TOP_MARGIN (f
)),
5954 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5956 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5959 /* Frame has just one top-level window. */
5960 set_window_height (FRAME_ROOT_WINDOW (f
),
5961 newheight
- FRAME_TOP_MARGIN (f
), 0);
5963 if (FRAME_TERMCAP_P (f
) && !pretend
)
5964 FrameRows
= newheight
;
5967 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5969 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5970 if (FRAME_HAS_MINIBUF_P (f
))
5971 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5973 if (FRAME_TERMCAP_P (f
) && !pretend
)
5974 FrameCols
= newwidth
;
5976 if (WINDOWP (f
->tool_bar_window
))
5977 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5980 FRAME_HEIGHT (f
) = newheight
;
5981 SET_FRAME_WIDTH (f
, newwidth
);
5984 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5985 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5987 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5989 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5990 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5991 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5992 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5996 SET_FRAME_GARBAGED (f
);
5997 calculate_costs (f
);
6001 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6003 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6004 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6005 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
6007 unbind_to (count
, Qnil
);
6012 /***********************************************************************
6013 Terminal Related Lisp Functions
6014 ***********************************************************************/
6016 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6017 1, 1, "FOpen termscript file: ",
6018 "Start writing all terminal output to FILE as well as the terminal.\n\
6019 FILE = nil means just close any termscript file currently open.")
6023 if (termscript
!= 0) fclose (termscript
);
6028 file
= Fexpand_file_name (file
, Qnil
);
6029 termscript
= fopen (XSTRING (file
)->data
, "w");
6030 if (termscript
== 0)
6031 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6037 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6038 Ssend_string_to_terminal
, 1, 1, 0,
6039 "Send STRING to the terminal without alteration.\n\
6040 Control characters in STRING will have terminal-dependent effects.")
6044 /* ??? Perhaps we should do something special for multibyte strings here. */
6045 CHECK_STRING (string
, 0);
6046 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
6050 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
6052 fflush (termscript
);
6058 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6059 "Beep, or flash the screen.\n\
6060 Also, unless an argument is given,\n\
6061 terminate any keyboard macro currently executing.")
6084 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6085 error ("Keyboard macro terminated by a command ringing the bell");
6093 /***********************************************************************
6095 ***********************************************************************/
6097 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6098 "Pause, without updating display, for SECONDS seconds.\n\
6099 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6100 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6101 additional wait period, in milliseconds; this may be useful if your\n\
6102 Emacs was built without floating point support.\n\
6103 \(Not all operating systems support waiting for a fraction of a second.)")
6104 (seconds
, milliseconds
)
6105 Lisp_Object seconds
, milliseconds
;
6109 if (NILP (milliseconds
))
6110 XSETINT (milliseconds
, 0);
6112 CHECK_NUMBER (milliseconds
, 1);
6113 usec
= XINT (milliseconds
) * 1000;
6116 double duration
= extract_float (seconds
);
6117 sec
= (int) duration
;
6118 usec
+= (duration
- sec
) * 1000000;
6121 #ifndef EMACS_HAS_USECS
6122 if (sec
== 0 && usec
!= 0)
6123 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6126 /* Assure that 0 <= usec < 1000000. */
6129 /* We can't rely on the rounding being correct if user is negative. */
6130 if (-1000000 < usec
)
6131 sec
--, usec
+= 1000000;
6133 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6136 sec
+= usec
/ 1000000, usec
%= 1000000;
6138 if (sec
< 0 || (sec
== 0 && usec
== 0))
6144 XSETFASTINT (zero
, 0);
6145 wait_reading_process_input (sec
, usec
, zero
, 0);
6148 /* We should always have wait_reading_process_input; we have a dummy
6149 implementation for systems which don't support subprocesses. */
6151 /* No wait_reading_process_input */
6158 /* The reason this is done this way
6159 (rather than defined (H_S) && defined (H_T))
6160 is because the VMS preprocessor doesn't grok `defined' */
6162 EMACS_GET_TIME (end_time
);
6163 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6164 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6168 EMACS_GET_TIME (timeout
);
6169 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6170 if (EMACS_TIME_NEG_P (timeout
)
6171 || !select (1, 0, 0, 0, &timeout
))
6174 #else /* not HAVE_SELECT */
6176 #endif /* HAVE_SELECT */
6177 #endif /* not VMS */
6180 #endif /* no subprocesses */
6186 /* This is just like wait_reading_process_input, except that
6187 it does the redisplay.
6189 It's also much like Fsit_for, except that it can be used for
6190 waiting for input as well. */
6193 sit_for (sec
, usec
, reading
, display
, initial_display
)
6194 int sec
, usec
, reading
, display
, initial_display
;
6196 Lisp_Object read_kbd
;
6198 swallow_events (display
);
6200 if (detect_input_pending_run_timers (display
))
6203 if (initial_display
)
6204 redisplay_preserve_echo_area (2);
6206 if (sec
== 0 && usec
== 0)
6213 XSETINT (read_kbd
, reading
? -1 : 1);
6214 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6216 return detect_input_pending () ? Qnil
: Qt
;
6220 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6221 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
6222 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6223 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6224 additional wait period, in milliseconds; this may be useful if your\n\
6225 Emacs was built without floating point support.\n\
6226 \(Not all operating systems support waiting for a fraction of a second.)\n\
6227 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
6228 Redisplay is preempted as always if input arrives, and does not happen\n\
6229 if input is available before it starts.\n\
6230 Value is t if waited the full time with no input arriving.")
6231 (seconds
, milliseconds
, nodisp
)
6232 Lisp_Object seconds
, milliseconds
, nodisp
;
6236 if (NILP (milliseconds
))
6237 XSETINT (milliseconds
, 0);
6239 CHECK_NUMBER (milliseconds
, 1);
6240 usec
= XINT (milliseconds
) * 1000;
6243 double duration
= extract_float (seconds
);
6244 sec
= (int) duration
;
6245 usec
+= (duration
- sec
) * 1000000;
6248 #ifndef EMACS_HAS_USECS
6249 if (usec
!= 0 && sec
== 0)
6250 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6253 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6258 /***********************************************************************
6259 Other Lisp Functions
6260 ***********************************************************************/
6262 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6263 session's frames, frame names, buffers, buffer-read-only flags, and
6264 buffer-modified-flags, and a trailing sentinel (so we don't need to
6265 add length checks). */
6267 static Lisp_Object frame_and_buffer_state
;
6270 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6271 Sframe_or_buffer_changed_p
, 0, 0, 0,
6272 "Return non-nil if the frame and buffer state appears to have changed.\n\
6273 The state variable is an internal vector containing all frames and buffers,\n\
6274 aside from buffers whose names start with space,\n\
6275 along with the buffers' read-only and modified flags, which allows a fast\n\
6276 check to see whether the menu bars might need to be recomputed.\n\
6277 If this function returns non-nil, it updates the internal vector to reflect\n\
6278 the current state.\n")
6281 Lisp_Object tail
, frame
, buf
;
6285 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6286 FOR_EACH_FRAME (tail
, frame
)
6288 if (!EQ (*vecp
++, frame
))
6290 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6293 /* Check that the buffer info matches.
6294 No need to test for the end of the vector
6295 because the last element of the vector is lambda
6296 and that will always cause a mismatch. */
6297 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6299 buf
= XCDR (XCAR (tail
));
6300 /* Ignore buffers that aren't included in buffer lists. */
6301 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6303 if (!EQ (*vecp
++, buf
))
6305 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6307 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6310 /* Detect deletion of a buffer at the end of the list. */
6311 if (EQ (*vecp
, Qlambda
))
6314 /* Start with 1 so there is room for at least one lambda at the end. */
6316 FOR_EACH_FRAME (tail
, frame
)
6318 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6320 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6321 if (n
> XVECTOR (frame_and_buffer_state
)->size
6322 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6323 /* Add 20 extra so we grow it less often. */
6324 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6325 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6326 FOR_EACH_FRAME (tail
, frame
)
6329 *vecp
++ = XFRAME (frame
)->name
;
6331 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6333 buf
= XCDR (XCAR (tail
));
6334 /* Ignore buffers that aren't included in buffer lists. */
6335 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6338 *vecp
++ = XBUFFER (buf
)->read_only
;
6339 *vecp
++ = Fbuffer_modified_p (buf
);
6341 /* Fill up the vector with lambdas (always at least one). */
6343 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6344 < XVECTOR (frame_and_buffer_state
)->size
)
6346 /* Make sure we didn't overflow the vector. */
6347 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6348 > XVECTOR (frame_and_buffer_state
)->size
)
6355 /***********************************************************************
6357 ***********************************************************************/
6359 char *terminal_type
;
6361 /* Initialization done when Emacs fork is started, before doing stty.
6362 Determine terminal type and set terminal_driver. Then invoke its
6363 decoding routine to set up variables in the terminal package. */
6368 #ifdef HAVE_X_WINDOWS
6369 extern int display_arg
;
6372 /* Construct the space glyph. */
6373 space_glyph
.type
= CHAR_GLYPH
;
6374 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6375 space_glyph
.charpos
= -1;
6379 cursor_in_echo_area
= 0;
6380 terminal_type
= (char *) 0;
6382 /* Now is the time to initialize this; it's used by init_sys_modes
6384 Vwindow_system
= Qnil
;
6386 /* If the user wants to use a window system, we shouldn't bother
6387 initializing the terminal. This is especially important when the
6388 terminal is so dumb that emacs gives up before and doesn't bother
6389 using the window system.
6391 If the DISPLAY environment variable is set and nonempty,
6392 try to use X, and die with an error message if that doesn't work. */
6394 #ifdef HAVE_X_WINDOWS
6399 display
= getenv ("DECW$DISPLAY");
6401 display
= getenv ("DISPLAY");
6404 display_arg
= (display
!= 0 && *display
!= 0);
6407 if (!inhibit_window_system
&& display_arg
6413 Vwindow_system
= intern ("x");
6415 Vwindow_system_version
= make_number (11);
6417 Vwindow_system_version
= make_number (10);
6419 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6420 /* In some versions of ncurses,
6421 tputs crashes if we have not called tgetent.
6423 { char b
[2044]; tgetent (b
, "xterm");}
6425 adjust_frame_glyphs_initially ();
6428 #endif /* HAVE_X_WINDOWS */
6431 if (!inhibit_window_system
)
6433 Vwindow_system
= intern ("w32");
6434 Vwindow_system_version
= make_number (1);
6435 adjust_frame_glyphs_initially ();
6438 #endif /* HAVE_NTGUI */
6441 if (!inhibit_window_system
)
6443 Vwindow_system
= intern ("mac");
6444 Vwindow_system_version
= make_number (1);
6445 adjust_frame_glyphs_initially ();
6448 #endif /* macintosh */
6450 /* If no window system has been specified, try to use the terminal. */
6453 fatal ("standard input is not a tty");
6457 /* Look at the TERM variable */
6458 terminal_type
= (char *) getenv ("TERM");
6462 fprintf (stderr
, "Please specify your terminal type.\n\
6463 For types defined in VMS, use set term /device=TYPE.\n\
6464 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6465 \(The quotation marks are necessary since terminal types are lower case.)\n");
6467 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6473 /* VMS DCL tends to up-case things, so down-case term type.
6474 Hardly any uppercase letters in terminal types; should be none. */
6476 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6479 strcpy (new, terminal_type
);
6481 for (p
= new; *p
; p
++)
6485 terminal_type
= new;
6489 term_init (terminal_type
);
6492 struct frame
*sf
= SELECTED_FRAME ();
6493 int width
= FRAME_WINDOW_WIDTH (sf
);
6494 int height
= FRAME_HEIGHT (sf
);
6496 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6498 /* If these sizes are so big they cause overflow, just ignore the
6499 change. It's not clear what better we could do. */
6500 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6501 fatal ("screen size %dx%d too big", width
, height
);
6504 adjust_frame_glyphs_initially ();
6505 calculate_costs (XFRAME (selected_frame
));
6510 #endif /* CANNOT_DUMP */
6511 signal (SIGWINCH
, window_change_signal
);
6512 #endif /* SIGWINCH */
6514 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6518 /* The MSDOS terminal turns on its ``window system'' relatively
6519 late into the startup, so we cannot do the frame faces'
6520 initialization just yet. It will be done later by pc-win.el
6521 and internal_terminal_init. */
6522 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6524 && NILP (Vwindow_system
))
6526 /* For the initial frame, we don't have any way of knowing what
6527 are the foreground and background colors of the terminal. */
6528 struct frame
*sf
= SELECTED_FRAME();
6530 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6531 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6532 call0 (intern ("tty-set-up-initial-frame-faces"));
6538 /***********************************************************************
6540 ***********************************************************************/
6542 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6543 Sinternal_show_cursor
, 2, 2, 0,
6544 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6545 WINDOW nil means use the selected window. SHOW non-nil means\n\
6546 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6547 don't show a cursor.")
6549 Lisp_Object window
, show
;
6551 /* Don't change cursor state while redisplaying. This could confuse
6553 if (!redisplaying_p
)
6556 window
= selected_window
;
6558 CHECK_WINDOW (window
, 2);
6560 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6567 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6568 Sinternal_show_cursor_p
, 0, 1, 0,
6569 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6570 WINDOW nil or omitted means report on the selected window.")
6577 window
= selected_window
;
6579 CHECK_WINDOW (window
, 2);
6581 w
= XWINDOW (window
);
6582 return w
->cursor_off_p
? Qnil
: Qt
;
6586 /***********************************************************************
6588 ***********************************************************************/
6593 defsubr (&Sredraw_frame
);
6594 defsubr (&Sredraw_display
);
6595 defsubr (&Sframe_or_buffer_changed_p
);
6596 defsubr (&Sopen_termscript
);
6598 defsubr (&Ssit_for
);
6599 defsubr (&Ssleep_for
);
6600 defsubr (&Ssend_string_to_terminal
);
6601 defsubr (&Sinternal_show_cursor
);
6602 defsubr (&Sinternal_show_cursor_p
);
6605 defsubr (&Sdump_redisplay_history
);
6608 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6609 staticpro (&frame_and_buffer_state
);
6611 Qdisplay_table
= intern ("display-table");
6612 staticpro (&Qdisplay_table
);
6613 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6614 staticpro (&Qredisplay_dont_pause
);
6616 DEFVAR_INT ("baud-rate", &baud_rate
,
6617 "*The output baud rate of the terminal.\n\
6618 On most systems, changing this value will affect the amount of padding\n\
6619 and the other strategic decisions made during redisplay.");
6621 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6622 "*Non-nil means invert the entire frame display.\n\
6623 This means everything is in inverse video which otherwise would not be.");
6625 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6626 "*Non-nil means try to flash the frame to represent a bell.");
6628 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6629 "*Non-nil means no need to redraw entire frame after suspending.\n\
6630 A non-nil value is useful if the terminal can automatically preserve\n\
6631 Emacs's frame display when you reenter Emacs.\n\
6632 It is up to you to set this variable if your terminal can do that.");
6634 DEFVAR_LISP ("window-system", &Vwindow_system
,
6635 "A symbol naming the window-system under which Emacs is running\n\
6636 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6638 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6639 "The version number of the window system in use.\n\
6640 For X windows, this is 10 or 11.");
6642 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6643 "Non-nil means put cursor in minibuffer, at end of any message there.");
6645 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6646 "Table defining how to output a glyph code to the frame.\n\
6647 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6648 Each element can be:\n\
6649 integer: a glyph code which this glyph is an alias for.\n\
6650 string: output this glyph using that string (not impl. in X windows).\n\
6651 nil: this glyph mod 524288 is the code of a character to output,\n\
6652 and this glyph / 524288 is the face number (see `face-id') to use\n\
6653 while outputting it.");
6654 Vglyph_table
= Qnil
;
6656 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6657 "Display table to use for buffers that specify none.\n\
6658 See `buffer-display-table' for more information.");
6659 Vstandard_display_table
= Qnil
;
6661 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6662 "*Non-nil means update isn't paused when input is detected.");
6663 redisplay_dont_pause
= 0;
6665 /* Initialize `window-system', unless init_display already decided it. */
6670 Vwindow_system
= Qnil
;
6671 Vwindow_system_version
= Qnil
;