1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
65 #endif /* macintosh */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define min(a, b) ((a) < (b) ? (a) : (b))
81 /* Get number of chars of output now in the buffer of a stdio stream.
82 This ought to be built in in stdio, but it isn't. Some s- files
83 override this because their stdio internals differ. */
85 #ifdef __GNU_LIBRARY__
87 /* The s- file might have overridden the definition with one that
88 works for the system's C library. But we are using the GNU C
89 library, so this is the right definition for every system. */
91 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
94 #undef PENDING_OUTPUT_COUNT
95 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
97 #else /* not __GNU_LIBRARY__ */
98 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
99 #include <stdio_ext.h>
100 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
102 #ifndef PENDING_OUTPUT_COUNT
103 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
105 #endif /* not __GNU_LIBRARY__ */
107 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
108 #include <term.h> /* for tgetent */
111 /* Structure to pass dimensions around. Used for character bounding
112 boxes, glyph matrix dimensions and alike. */
121 /* Function prototypes. */
123 static void save_or_restore_current_matrix
P_ ((struct frame
*, int));
124 static void fake_current_matrices
P_ ((Lisp_Object
));
125 static void redraw_overlapping_rows
P_ ((struct window
*, int));
126 static void redraw_overlapped_rows
P_ ((struct window
*, int));
127 static int count_blanks
P_ ((struct glyph
*, int));
128 static int count_match
P_ ((struct glyph
*, struct glyph
*,
129 struct glyph
*, struct glyph
*));
130 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
131 static void update_frame_line
P_ ((struct frame
*, int));
132 static struct dim allocate_matrices_for_frame_redisplay
133 P_ ((Lisp_Object
, int, int, struct dim
, int, int *));
134 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*,
136 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
137 static void adjust_frame_glyphs
P_ ((struct frame
*));
138 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
139 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
140 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
141 int, int, struct dim
));
142 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
143 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
147 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
148 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
150 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
152 static struct glyph_pool
*new_glyph_pool
P_ ((void));
153 static void free_glyph_pool
P_ ((struct glyph_pool
*));
154 static void adjust_frame_glyphs_initially
P_ ((void));
155 static void adjust_frame_message_buffer
P_ ((struct frame
*));
156 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
157 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
158 static void build_frame_matrix
P_ ((struct frame
*));
159 void clear_current_matrices
P_ ((struct frame
*));
160 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
162 static void clear_window_matrices
P_ ((struct window
*, int));
163 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
164 static int scrolling_window
P_ ((struct window
*, int));
165 static int update_window_line
P_ ((struct window
*, int, int *));
166 static void update_marginal_area
P_ ((struct window
*, int, int));
167 static int update_text_area
P_ ((struct window
*, int));
168 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
170 static void mirror_make_current
P_ ((struct window
*, int));
171 void check_window_matrix_pointers
P_ ((struct window
*));
173 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
174 struct glyph_matrix
*));
176 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
177 static int update_window_tree
P_ ((struct window
*, int));
178 static int update_window
P_ ((struct window
*, int));
179 static int update_frame_1
P_ ((struct frame
*, int, int));
180 static void set_window_cursor_after_update
P_ ((struct window
*));
181 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
182 struct glyph_row
*, int));
183 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
184 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
185 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
186 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
187 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
188 struct window
*frame_row_to_window
P_ ((struct window
*, int));
191 /* Non-zero means don't pause redisplay for pending input. (This is
192 for debugging and for a future implementation of EDT-like
195 int redisplay_dont_pause
;
197 /* Nonzero upon entry to redisplay means do not assume anything about
198 current contents of actual terminal frame; clear and redraw it. */
202 /* Nonzero means last display completed. Zero means it was preempted. */
204 int display_completed
;
206 /* Lisp variable visible-bell; enables use of screen-flash instead of
211 /* Invert the color of the whole frame, at a low level. */
215 /* Line speed of the terminal. */
219 /* Either nil or a symbol naming the window system under which Emacs
222 Lisp_Object Vwindow_system
;
224 /* Version number of X windows: 10, 11 or nil. */
226 Lisp_Object Vwindow_system_version
;
228 /* Vector of glyph definitions. Indexed by glyph number, the contents
229 are a string which is how to output the glyph.
231 If Vglyph_table is nil, a glyph is output by using its low 8 bits
234 This is an obsolete feature that is no longer used. The variable
235 is retained for compatibility. */
237 Lisp_Object Vglyph_table
;
239 /* Display table to use for vectors that don't specify their own. */
241 Lisp_Object Vstandard_display_table
;
243 /* Nonzero means reading single-character input with prompt so put
244 cursor on mini-buffer after the prompt. positive means at end of
245 text in echo area; negative means at beginning of line. */
247 int cursor_in_echo_area
;
249 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
252 /* The currently selected frame. In a single-frame version, this
253 variable always equals the_only_frame. */
255 Lisp_Object selected_frame
;
257 /* A frame which is not just a mini-buffer, or 0 if there are no such
258 frames. This is usually the most recent such frame that was
259 selected. In a single-frame version, this variable always holds
260 the address of the_only_frame. */
262 struct frame
*last_nonminibuf_frame
;
264 /* Stdio stream being used for copy of all output. */
268 /* Structure for info on cursor positioning. */
272 /* 1 means SIGWINCH happened when not safe. */
274 int delayed_size_change
;
276 /* 1 means glyph initialization has been completed at startup. */
278 static int glyphs_initialized_initially_p
;
280 /* Updated window if != 0. Set by update_window. */
282 struct window
*updated_window
;
284 /* Glyph row updated in update_window_line, and area that is updated. */
286 struct glyph_row
*updated_row
;
289 /* A glyph for a space. */
291 struct glyph space_glyph
;
293 /* Non-zero means update has been performed directly, so that there's
294 no need for redisplay_internal to do much work. Set by
295 direct_output_for_insert. */
297 int redisplay_performed_directly_p
;
299 /* Counts of allocated structures. These counts serve to diagnose
300 memory leaks and double frees. */
302 int glyph_matrix_count
;
303 int glyph_pool_count
;
305 /* If non-null, the frame whose frame matrices are manipulated. If
306 null, window matrices are worked on. */
308 static struct frame
*frame_matrix_frame
;
310 /* Current interface for window-based redisplay. Set from init_xterm.
311 A null value means we are not using window-based redisplay. */
313 struct redisplay_interface
*rif
;
315 /* Non-zero means that fonts have been loaded since the last glyph
316 matrix adjustments. Redisplay must stop, and glyph matrices must
317 be adjusted when this flag becomes non-zero during display. The
318 reason fonts can be loaded so late is that fonts of fontsets are
323 /* Convert vpos and hpos from frame to window and vice versa.
324 This may only be used for terminal frames. */
328 static int window_to_frame_vpos
P_ ((struct window
*, int));
329 static int window_to_frame_hpos
P_ ((struct window
*, int));
330 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
331 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
333 /* One element of the ring buffer containing redisplay history
336 struct redisplay_history
338 char trace
[512 + 100];
341 /* The size of the history buffer. */
343 #define REDISPLAY_HISTORY_SIZE 30
345 /* The redisplay history buffer. */
347 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
349 /* Next free entry in redisplay_history. */
351 static int history_idx
;
353 /* A tick that's incremented each time something is added to the
356 static unsigned history_tick
;
358 static void add_frame_display_history
P_ ((struct frame
*, int));
359 static void add_window_display_history
P_ ((struct window
*, char *, int));
362 /* Add to the redisplay history how window W has been displayed.
363 MSG is a trace containing the information how W's glyph matrix
364 has been contructed. PAUSED_P non-zero means that the update
365 has been interrupted for pending input. */
368 add_window_display_history (w
, msg
, paused_p
)
375 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
377 buf
= redisplay_history
[history_idx
].trace
;
380 sprintf (buf
, "%d: window %p (`%s')%s\n",
383 ((BUFFERP (w
->buffer
)
384 && STRINGP (XBUFFER (w
->buffer
)->name
))
385 ? (char *) XSTRING (XBUFFER (w
->buffer
)->name
)->data
387 paused_p
? " ***paused***" : "");
392 /* Add to the redisplay history that frame F has been displayed.
393 PAUSED_P non-zero means that the update has been interrupted for
397 add_frame_display_history (f
, paused_p
)
403 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
405 buf
= redisplay_history
[history_idx
].trace
;
408 sprintf (buf
, "%d: update frame %p%s",
410 f
, paused_p
? " ***paused***" : "");
414 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
415 Sdump_redisplay_history
, 0, 0, "",
416 "Dump redisplay history to stderr.")
421 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
424 i
= REDISPLAY_HISTORY_SIZE
- 1;
425 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
432 #else /* GLYPH_DEBUG == 0 */
434 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + XFASTINT ((W)->top))
435 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + XFASTINT ((W)->left))
437 #endif /* GLYPH_DEBUG == 0 */
440 /* Like bcopy except never gets confused by overlap. Let this be the
441 first function defined in this file, or change emacs.c where the
442 address of this function is used. */
445 safe_bcopy (from
, to
, size
)
449 if (size
<= 0 || from
== to
)
452 /* If the source and destination don't overlap, then bcopy can
453 handle it. If they do overlap, but the destination is lower in
454 memory than the source, we'll assume bcopy can handle that. */
455 if (to
< from
|| from
+ size
<= to
)
456 bcopy (from
, to
, size
);
458 /* Otherwise, we'll copy from the end. */
461 register char *endf
= from
+ size
;
462 register char *endt
= to
+ size
;
464 /* If TO - FROM is large, then we should break the copy into
465 nonoverlapping chunks of TO - FROM bytes each. However, if
466 TO - FROM is small, then the bcopy function call overhead
467 makes this not worth it. The crossover point could be about
468 anywhere. Since I don't think the obvious copy loop is too
469 bad, I'm trying to err in its favor. */
474 while (endf
!= from
);
486 bcopy (endf
, endt
, to
- from
);
489 /* If SIZE wasn't a multiple of TO - FROM, there will be a
490 little left over. The amount left over is (endt + (to -
491 from)) - to, which is endt - from. */
492 bcopy (from
, to
, endt
- from
);
499 /***********************************************************************
501 ***********************************************************************/
503 /* Allocate and return a glyph_matrix structure. POOL is the glyph
504 pool from which memory for the matrix should be allocated, or null
505 for window-based redisplay where no glyph pools are used. The
506 member `pool' of the glyph matrix structure returned is set to
507 POOL, the structure is otherwise zeroed. */
509 struct glyph_matrix
*
510 new_glyph_matrix (pool
)
511 struct glyph_pool
*pool
;
513 struct glyph_matrix
*result
;
515 /* Allocate and clear. */
516 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
517 bzero (result
, sizeof *result
);
519 /* Increment number of allocated matrices. This count is used
520 to detect memory leaks. */
521 ++glyph_matrix_count
;
523 /* Set pool and return. */
529 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
531 The global counter glyph_matrix_count is decremented when a matrix
532 is freed. If the count gets negative, more structures were freed
533 than allocated, i.e. one matrix was freed more than once or a bogus
534 pointer was passed to this function.
536 If MATRIX->pool is null, this means that the matrix manages its own
537 glyph memory---this is done for matrices on X frames. Freeing the
538 matrix also frees the glyph memory in this case. */
541 free_glyph_matrix (matrix
)
542 struct glyph_matrix
*matrix
;
548 /* Detect the case that more matrices are freed than were
550 if (--glyph_matrix_count
< 0)
553 /* Free glyph memory if MATRIX owns it. */
554 if (matrix
->pool
== NULL
)
555 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
556 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
558 /* Free row structures and the matrix itself. */
559 xfree (matrix
->rows
);
565 /* Return the number of glyphs to reserve for a marginal area of
566 window W. TOTAL_GLYPHS is the number of glyphs in a complete
567 display line of window W. MARGIN gives the width of the marginal
568 area in canonical character units. MARGIN should be an integer
572 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
579 if (NUMBERP (margin
))
581 int width
= XFASTINT (w
->width
);
582 double d
= max (0, XFLOATINT (margin
));
583 d
= min (width
/ 2 - 1, d
);
584 n
= (int) ((double) total_glyphs
/ width
* d
);
593 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
596 W is null if the function is called for a frame glyph matrix.
597 Otherwise it is the window MATRIX is a member of. X and Y are the
598 indices of the first column and row of MATRIX within the frame
599 matrix, if such a matrix exists. They are zero for purely
600 window-based redisplay. DIM is the needed size of the matrix.
602 In window-based redisplay, where no frame matrices exist, glyph
603 matrices manage their own glyph storage. Otherwise, they allocate
604 storage from a common frame glyph pool which can be found in
607 The reason for this memory management strategy is to avoid complete
608 frame redraws if possible. When we allocate from a common pool, a
609 change of the location or size of a sub-matrix within the pool
610 requires a complete redisplay of the frame because we cannot easily
611 make sure that the current matrices of all windows still agree with
612 what is displayed on the screen. While this is usually fast, it
613 leads to screen flickering. */
616 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
618 struct glyph_matrix
*matrix
;
624 int marginal_areas_changed_p
= 0;
625 int header_line_changed_p
= 0;
626 int header_line_p
= 0;
627 int left
= -1, right
= -1;
628 int window_x
, window_y
, window_width
= -1, window_height
;
630 /* See if W had a top line that has disappeared now, or vice versa. */
633 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
634 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
636 matrix
->header_line_p
= header_line_p
;
638 /* Do nothing if MATRIX' size, position, vscroll, and marginal areas
639 haven't changed. This optimization is important because preserving
640 the matrix means preventing redisplay. */
641 if (matrix
->pool
== NULL
)
643 window_box (w
, -1, &window_x
, &window_y
, &window_width
, &window_height
);
644 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_width
);
645 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_width
);
646 xassert (left
>= 0 && right
>= 0);
647 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
648 || right
!= matrix
->right_margin_glyphs
);
650 if (!marginal_areas_changed_p
652 && !header_line_changed_p
653 && matrix
->window_left_x
== XFASTINT (w
->left
)
654 && matrix
->window_top_y
== XFASTINT (w
->top
)
655 && matrix
->window_height
== window_height
656 && matrix
->window_vscroll
== w
->vscroll
657 && matrix
->window_width
== window_width
)
661 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
662 if (matrix
->rows_allocated
< dim
.height
)
664 int size
= dim
.height
* sizeof (struct glyph_row
);
665 new_rows
= dim
.height
- matrix
->rows_allocated
;
666 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
667 bzero (matrix
->rows
+ matrix
->rows_allocated
,
668 new_rows
* sizeof *matrix
->rows
);
669 matrix
->rows_allocated
= dim
.height
;
674 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
675 on a frame not using window-based redisplay. Set up pointers for
676 each row into the glyph pool. */
679 xassert (matrix
->pool
->glyphs
);
683 left
= margin_glyphs_to_reserve (w
, dim
.width
,
684 w
->left_margin_width
);
685 right
= margin_glyphs_to_reserve (w
, dim
.width
,
686 w
->right_margin_width
);
691 for (i
= 0; i
< dim
.height
; ++i
)
693 struct glyph_row
*row
= &matrix
->rows
[i
];
695 row
->glyphs
[LEFT_MARGIN_AREA
]
696 = (matrix
->pool
->glyphs
697 + (y
+ i
) * matrix
->pool
->ncolumns
701 || row
== matrix
->rows
+ dim
.height
- 1
702 || (row
== matrix
->rows
&& matrix
->header_line_p
))
704 row
->glyphs
[TEXT_AREA
]
705 = row
->glyphs
[LEFT_MARGIN_AREA
];
706 row
->glyphs
[RIGHT_MARGIN_AREA
]
707 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
708 row
->glyphs
[LAST_AREA
]
709 = row
->glyphs
[RIGHT_MARGIN_AREA
];
713 row
->glyphs
[TEXT_AREA
]
714 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
715 row
->glyphs
[RIGHT_MARGIN_AREA
]
716 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
717 row
->glyphs
[LAST_AREA
]
718 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
722 matrix
->left_margin_glyphs
= left
;
723 matrix
->right_margin_glyphs
= right
;
727 /* If MATRIX->pool is null, MATRIX is responsible for managing
728 its own memory. Allocate glyph memory from the heap. */
729 if (dim
.width
> matrix
->matrix_w
731 || header_line_changed_p
732 || marginal_areas_changed_p
)
734 struct glyph_row
*row
= matrix
->rows
;
735 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
739 row
->glyphs
[LEFT_MARGIN_AREA
]
740 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
742 * sizeof (struct glyph
)));
744 /* The mode line never has marginal areas. */
745 if (row
== matrix
->rows
+ dim
.height
- 1
746 || (row
== matrix
->rows
&& matrix
->header_line_p
))
748 row
->glyphs
[TEXT_AREA
]
749 = row
->glyphs
[LEFT_MARGIN_AREA
];
750 row
->glyphs
[RIGHT_MARGIN_AREA
]
751 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
752 row
->glyphs
[LAST_AREA
]
753 = row
->glyphs
[RIGHT_MARGIN_AREA
];
757 row
->glyphs
[TEXT_AREA
]
758 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
759 row
->glyphs
[RIGHT_MARGIN_AREA
]
760 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
761 row
->glyphs
[LAST_AREA
]
762 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
768 xassert (left
>= 0 && right
>= 0);
769 matrix
->left_margin_glyphs
= left
;
770 matrix
->right_margin_glyphs
= right
;
773 /* Number of rows to be used by MATRIX. */
774 matrix
->nrows
= dim
.height
;
775 xassert (matrix
->nrows
>= 0);
777 /* Mark rows in a current matrix of a window as not having valid
778 contents. It's important to not do this for desired matrices.
779 When Emacs starts, it may already be building desired matrices
780 when this function runs. */
781 if (w
&& matrix
== w
->current_matrix
)
783 if (window_width
< 0)
784 window_width
= window_box_width (w
, -1);
786 /* Optimize the case that only the height has changed (C-x 2,
787 upper window). Invalidate all rows that are no longer part
789 if (!marginal_areas_changed_p
790 && matrix
->window_left_x
== XFASTINT (w
->left
)
791 && matrix
->window_top_y
== XFASTINT (w
->top
)
792 && matrix
->window_width
== window_box_width (w
, -1))
795 while (matrix
->rows
[i
].enabled_p
796 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
797 < matrix
->window_height
))
800 /* Window end is invalid, if inside of the rows that
802 if (INTEGERP (w
->window_end_vpos
)
803 && XFASTINT (w
->window_end_vpos
) >= i
)
804 w
->window_end_valid
= Qnil
;
806 while (i
< matrix
->nrows
)
807 matrix
->rows
[i
++].enabled_p
= 0;
811 for (i
= 0; i
< matrix
->nrows
; ++i
)
812 matrix
->rows
[i
].enabled_p
= 0;
816 /* Remember last values to be able to optimize frame redraws. */
817 matrix
->matrix_x
= x
;
818 matrix
->matrix_y
= y
;
819 matrix
->matrix_w
= dim
.width
;
820 matrix
->matrix_h
= dim
.height
;
822 /* Record the top y location and height of W at the time the matrix
823 was last adjusted. This is used to optimize redisplay above. */
826 matrix
->window_left_x
= XFASTINT (w
->left
);
827 matrix
->window_top_y
= XFASTINT (w
->top
);
828 matrix
->window_height
= window_height
;
829 matrix
->window_width
= window_width
;
830 matrix
->window_vscroll
= w
->vscroll
;
835 /* Reverse the contents of rows in MATRIX between START and END. The
836 contents of the row at END - 1 end up at START, END - 2 at START +
837 1 etc. This is part of the implementation of rotate_matrix (see
841 reverse_rows (matrix
, start
, end
)
842 struct glyph_matrix
*matrix
;
847 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
849 /* Non-ISO HP/UX compiler doesn't like auto struct
851 struct glyph_row temp
;
852 temp
= matrix
->rows
[i
];
853 matrix
->rows
[i
] = matrix
->rows
[j
];
854 matrix
->rows
[j
] = temp
;
859 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
860 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
861 indices. (Note: this does not copy glyphs, only glyph pointers in
862 row structures are moved around).
864 The algorithm used for rotating the vector was, I believe, first
865 described by Kernighan. See the vector R as consisting of two
866 sub-vectors AB, where A has length BY for BY >= 0. The result
867 after rotating is then BA. Reverse both sub-vectors to get ArBr
868 and reverse the result to get (ArBr)r which is BA. Similar for
872 rotate_matrix (matrix
, first
, last
, by
)
873 struct glyph_matrix
*matrix
;
878 /* Up (rotate left, i.e. towards lower indices). */
880 reverse_rows (matrix
, first
, first
+ by
);
881 reverse_rows (matrix
, first
+ by
, last
);
882 reverse_rows (matrix
, first
, last
);
886 /* Down (rotate right, i.e. towards higher indices). */
887 reverse_rows (matrix
, last
- by
, last
);
888 reverse_rows (matrix
, first
, last
- by
);
889 reverse_rows (matrix
, first
, last
);
894 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
895 with indices START <= index < END. Increment positions by DELTA/
899 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
900 struct glyph_matrix
*matrix
;
901 int start
, end
, delta
, delta_bytes
;
903 /* Check that START and END are reasonable values. */
904 xassert (start
>= 0 && start
<= matrix
->nrows
);
905 xassert (end
>= 0 && end
<= matrix
->nrows
);
906 xassert (start
<= end
);
908 for (; start
< end
; ++start
)
909 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
913 /* Enable a range of rows in glyph matrix MATRIX. START and END are
914 the row indices of the first and last + 1 row to enable. If
915 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
918 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
919 struct glyph_matrix
*matrix
;
923 xassert (start
<= end
);
924 xassert (start
>= 0 && start
< matrix
->nrows
);
925 xassert (end
>= 0 && end
<= matrix
->nrows
);
927 for (; start
< end
; ++start
)
928 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
934 This empties all rows in MATRIX by setting the enabled_p flag for
935 all rows of the matrix to zero. The function prepare_desired_row
936 will eventually really clear a row when it sees one with a zero
939 Resets update hints to defaults value. The only update hint
940 currently present is the flag MATRIX->no_scrolling_p. */
943 clear_glyph_matrix (matrix
)
944 struct glyph_matrix
*matrix
;
948 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
949 matrix
->no_scrolling_p
= 0;
954 /* Shift part of the glyph matrix MATRIX of window W up or down.
955 Increment y-positions in glyph rows between START and END by DY,
956 and recompute their visible height. */
959 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
961 struct glyph_matrix
*matrix
;
966 xassert (start
<= end
);
967 xassert (start
>= 0 && start
< matrix
->nrows
);
968 xassert (end
>= 0 && end
<= matrix
->nrows
);
970 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
971 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
973 for (; start
< end
; ++start
)
975 struct glyph_row
*row
= &matrix
->rows
[start
];
980 row
->visible_height
= row
->height
- (min_y
- row
->y
);
981 else if (row
->y
+ row
->height
> max_y
)
982 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
984 row
->visible_height
= row
->height
;
989 /* Mark all rows in current matrices of frame F as invalid. Marking
990 invalid is done by setting enabled_p to zero for all rows in a
994 clear_current_matrices (f
)
995 register struct frame
*f
;
997 /* Clear frame current matrix, if we have one. */
998 if (f
->current_matrix
)
999 clear_glyph_matrix (f
->current_matrix
);
1001 /* Clear the matrix of the menu bar window, if such a window exists.
1002 The menu bar window is currently used to display menus on X when
1003 no toolkit support is compiled in. */
1004 if (WINDOWP (f
->menu_bar_window
))
1005 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1007 /* Clear the matrix of the tool-bar window, if any. */
1008 if (WINDOWP (f
->tool_bar_window
))
1009 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1011 /* Clear current window matrices. */
1012 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1013 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1017 /* Clear out all display lines of F for a coming redisplay. */
1020 clear_desired_matrices (f
)
1021 register struct frame
*f
;
1023 if (f
->desired_matrix
)
1024 clear_glyph_matrix (f
->desired_matrix
);
1026 if (WINDOWP (f
->menu_bar_window
))
1027 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1029 if (WINDOWP (f
->tool_bar_window
))
1030 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1032 /* Do it for window matrices. */
1033 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1034 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1038 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1039 non-zero clear desired matrices, otherwise clear current matrices. */
1042 clear_window_matrices (w
, desired_p
)
1048 if (!NILP (w
->hchild
))
1050 xassert (WINDOWP (w
->hchild
));
1051 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1053 else if (!NILP (w
->vchild
))
1055 xassert (WINDOWP (w
->vchild
));
1056 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1061 clear_glyph_matrix (w
->desired_matrix
);
1064 clear_glyph_matrix (w
->current_matrix
);
1065 w
->window_end_valid
= Qnil
;
1069 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1075 /***********************************************************************
1078 See dispextern.h for an overall explanation of glyph rows.
1079 ***********************************************************************/
1081 /* Clear glyph row ROW. Do it in a way that makes it robust against
1082 changes in the glyph_row structure, i.e. addition or removal of
1083 structure members. */
1085 static struct glyph_row null_row
;
1088 clear_glyph_row (row
)
1089 struct glyph_row
*row
;
1091 struct glyph
*p
[1 + LAST_AREA
];
1093 /* Save pointers. */
1094 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1095 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1096 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1097 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1102 /* Restore pointers. */
1103 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1104 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1105 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1106 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1108 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1109 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1110 Redisplay outputs such glyphs, and flickering effects were
1111 the result. This also depended on the contents of memory
1112 returned by xmalloc. If flickering happens again, activate
1113 the code below If the flickering is gone with that, chances
1114 are that the flickering has the same reason as here. */
1115 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1120 /* Make ROW an empty, enabled row of canonical character height,
1121 in window W starting at y-position Y. */
1124 blank_row (w
, row
, y
)
1126 struct glyph_row
*row
;
1131 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1132 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1134 clear_glyph_row (row
);
1136 row
->ascent
= row
->phys_ascent
= 0;
1137 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1140 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1141 else if (row
->y
+ row
->height
> max_y
)
1142 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1144 row
->visible_height
= row
->height
;
1150 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1151 are the amounts by which to change positions. Note that the first
1152 glyph of the text area of a row can have a buffer position even if
1153 the used count of the text area is zero. Such rows display line
1157 increment_row_positions (row
, delta
, delta_bytes
)
1158 struct glyph_row
*row
;
1159 int delta
, delta_bytes
;
1163 /* Increment start and end positions. */
1164 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1165 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1166 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1167 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1169 /* Increment positions in glyphs. */
1170 for (area
= 0; area
< LAST_AREA
; ++area
)
1171 for (i
= 0; i
< row
->used
[area
]; ++i
)
1172 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1173 && row
->glyphs
[area
][i
].charpos
> 0)
1174 row
->glyphs
[area
][i
].charpos
+= delta
;
1176 /* Capture the case of rows displaying a line end. */
1177 if (row
->used
[TEXT_AREA
] == 0
1178 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1179 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1184 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1185 contents, i.e. glyph structure contents are exchanged between A and
1186 B without changing glyph pointers in A and B. */
1189 swap_glyphs_in_rows (a
, b
)
1190 struct glyph_row
*a
, *b
;
1194 for (area
= 0; area
< LAST_AREA
; ++area
)
1196 /* Number of glyphs to swap. */
1197 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1199 /* Start of glyphs in area of row A. */
1200 struct glyph
*glyph_a
= a
->glyphs
[area
];
1202 /* End + 1 of glyphs in area of row A. */
1203 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1205 /* Start of glyphs in area of row B. */
1206 struct glyph
*glyph_b
= b
->glyphs
[area
];
1208 while (glyph_a
< glyph_a_end
)
1210 /* Non-ISO HP/UX compiler doesn't like auto struct
1214 *glyph_a
= *glyph_b
;
1224 /* Exchange pointers to glyph memory between glyph rows A and B. */
1227 swap_glyph_pointers (a
, b
)
1228 struct glyph_row
*a
, *b
;
1231 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1233 struct glyph
*temp
= a
->glyphs
[i
];
1234 a
->glyphs
[i
] = b
->glyphs
[i
];
1235 b
->glyphs
[i
] = temp
;
1240 /* Copy glyph row structure FROM to glyph row structure TO, except
1241 that glyph pointers in the structures are left unchanged. */
1244 copy_row_except_pointers (to
, from
)
1245 struct glyph_row
*to
, *from
;
1247 struct glyph
*pointers
[1 + LAST_AREA
];
1249 /* Save glyph pointers of TO. */
1250 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1252 /* Do a structure assignment. */
1255 /* Restore original pointers of TO. */
1256 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1260 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1261 TO and FROM are left unchanged. Glyph contents are copied from the
1262 glyph memory of FROM to the glyph memory of TO. Increment buffer
1263 positions in row TO by DELTA/ DELTA_BYTES. */
1266 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1267 struct glyph_row
*to
, *from
;
1268 int delta
, delta_bytes
;
1272 /* This is like a structure assignment TO = FROM, except that
1273 glyph pointers in the rows are left unchanged. */
1274 copy_row_except_pointers (to
, from
);
1276 /* Copy glyphs from FROM to TO. */
1277 for (area
= 0; area
< LAST_AREA
; ++area
)
1278 if (from
->used
[area
])
1279 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1280 from
->used
[area
] * sizeof (struct glyph
));
1282 /* Increment buffer positions in TO by DELTA. */
1283 increment_row_positions (to
, delta
, delta_bytes
);
1287 /* Assign glyph row FROM to glyph row TO. This works like a structure
1288 assignment TO = FROM, except that glyph pointers are not copied but
1289 exchanged between TO and FROM. Pointers must be exchanged to avoid
1293 assign_row (to
, from
)
1294 struct glyph_row
*to
, *from
;
1296 swap_glyph_pointers (to
, from
);
1297 copy_row_except_pointers (to
, from
);
1301 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1302 a row in a window matrix, is a slice of the glyph memory of the
1303 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1304 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1305 memory of FRAME_ROW. */
1310 glyph_row_slice_p (window_row
, frame_row
)
1311 struct glyph_row
*window_row
, *frame_row
;
1313 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1314 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1315 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1317 return (frame_glyph_start
<= window_glyph_start
1318 && window_glyph_start
< frame_glyph_end
);
1321 #endif /* GLYPH_DEBUG */
1325 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1326 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1327 in WINDOW_MATRIX is found satisfying the condition. */
1329 static struct glyph_row
*
1330 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1331 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1336 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1338 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1339 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1340 frame_matrix
->rows
+ row
))
1343 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1348 /* Prepare ROW for display. Desired rows are cleared lazily,
1349 i.e. they are only marked as to be cleared by setting their
1350 enabled_p flag to zero. When a row is to be displayed, a prior
1351 call to this function really clears it. */
1354 prepare_desired_row (row
)
1355 struct glyph_row
*row
;
1357 if (!row
->enabled_p
)
1359 clear_glyph_row (row
);
1365 /* Return a hash code for glyph row ROW. */
1368 line_hash_code (row
)
1369 struct glyph_row
*row
;
1377 /* Give all highlighted lines the same hash code
1378 so as to encourage scrolling to leave them in place. */
1383 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1384 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1388 int c
= glyph
->u
.ch
;
1389 int face_id
= glyph
->face_id
;
1390 if (must_write_spaces
)
1392 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1393 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1406 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1407 the number of characters in the line. If must_write_spaces is
1408 zero, leading and trailing spaces are ignored. */
1411 line_draw_cost (matrix
, vpos
)
1412 struct glyph_matrix
*matrix
;
1415 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1416 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1417 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1419 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1420 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1422 /* Ignore trailing and leading spaces if we can. */
1423 if (!must_write_spaces
)
1425 /* Skip from the end over trailing spaces. */
1426 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1429 /* All blank line. */
1433 /* Skip over leading spaces. */
1434 while (CHAR_GLYPH_SPACE_P (*beg
))
1438 /* If we don't have a glyph-table, each glyph is one character,
1439 so return the number of glyphs. */
1440 if (glyph_table_base
== 0)
1444 /* Otherwise, scan the glyphs and accumulate their total length
1449 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1452 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1455 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1465 /* Test two glyph rows A and B for equality. Value is non-zero if A
1466 and B have equal contents. W is the window to which the glyphs
1467 rows A and B belong. It is needed here to test for partial row
1468 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1469 flags of A and B, too. */
1472 row_equal_p (w
, a
, b
, mouse_face_p
)
1474 struct glyph_row
*a
, *b
;
1479 else if (a
->hash
!= b
->hash
)
1483 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1486 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1489 /* Compare glyphs. */
1490 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1492 if (a
->used
[area
] != b
->used
[area
])
1495 a_glyph
= a
->glyphs
[area
];
1496 a_end
= a_glyph
+ a
->used
[area
];
1497 b_glyph
= b
->glyphs
[area
];
1499 while (a_glyph
< a_end
1500 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1501 ++a_glyph
, ++b_glyph
;
1503 if (a_glyph
!= a_end
)
1507 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1508 || a
->inverse_p
!= b
->inverse_p
1509 || a
->fill_line_p
!= b
->fill_line_p
1510 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1511 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1512 || a
->continued_p
!= b
->continued_p
1513 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1514 || a
->overlapped_p
!= b
->overlapped_p
1515 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1516 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1517 /* Different partially visible characters on left margin. */
1519 /* Different height. */
1520 || a
->ascent
!= b
->ascent
1521 || a
->phys_ascent
!= b
->phys_ascent
1522 || a
->phys_height
!= b
->phys_height
1523 || a
->visible_height
!= b
->visible_height
)
1532 /***********************************************************************
1535 See dispextern.h for an overall explanation of glyph pools.
1536 ***********************************************************************/
1538 /* Allocate a glyph_pool structure. The structure returned is
1539 initialized with zeros. The global variable glyph_pool_count is
1540 incremented for each pool allocated. */
1542 static struct glyph_pool
*
1545 struct glyph_pool
*result
;
1547 /* Allocate a new glyph_pool and clear it. */
1548 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1549 bzero (result
, sizeof *result
);
1551 /* For memory leak and double deletion checking. */
1558 /* Free a glyph_pool structure POOL. The function may be called with
1559 a null POOL pointer. The global variable glyph_pool_count is
1560 decremented with every pool structure freed. If this count gets
1561 negative, more structures were freed than allocated, i.e. one
1562 structure must have been freed more than once or a bogus pointer
1563 was passed to free_glyph_pool. */
1566 free_glyph_pool (pool
)
1567 struct glyph_pool
*pool
;
1571 /* More freed than allocated? */
1573 xassert (glyph_pool_count
>= 0);
1575 xfree (pool
->glyphs
);
1581 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1582 columns we need. This function never shrinks a pool. The only
1583 case in which this would make sense, would be when a frame's size
1584 is changed from a large value to a smaller one. But, if someone
1585 does it once, we can expect that he will do it again.
1587 Value is non-zero if the pool changed in a way which makes
1588 re-adjusting window glyph matrices necessary. */
1591 realloc_glyph_pool (pool
, matrix_dim
)
1592 struct glyph_pool
*pool
;
1593 struct dim matrix_dim
;
1598 changed_p
= (pool
->glyphs
== 0
1599 || matrix_dim
.height
!= pool
->nrows
1600 || matrix_dim
.width
!= pool
->ncolumns
);
1602 /* Enlarge the glyph pool. */
1603 needed
= matrix_dim
.width
* matrix_dim
.height
;
1604 if (needed
> pool
->nglyphs
)
1606 int size
= needed
* sizeof (struct glyph
);
1609 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1612 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1613 bzero (pool
->glyphs
, size
);
1616 pool
->nglyphs
= needed
;
1619 /* Remember the number of rows and columns because (a) we use then
1620 to do sanity checks, and (b) the number of columns determines
1621 where rows in the frame matrix start---this must be available to
1622 determine pointers to rows of window sub-matrices. */
1623 pool
->nrows
= matrix_dim
.height
;
1624 pool
->ncolumns
= matrix_dim
.width
;
1631 /***********************************************************************
1633 ***********************************************************************/
1638 /* Flush standard output. This is sometimes useful to call from
1648 /* Check that no glyph pointers have been lost in MATRIX. If a
1649 pointer has been lost, e.g. by using a structure assignment between
1650 rows, at least one pointer must occur more than once in the rows of
1654 check_matrix_pointer_lossage (matrix
)
1655 struct glyph_matrix
*matrix
;
1659 for (i
= 0; i
< matrix
->nrows
; ++i
)
1660 for (j
= 0; j
< matrix
->nrows
; ++j
)
1662 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1663 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1667 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1670 matrix_row (matrix
, row
)
1671 struct glyph_matrix
*matrix
;
1674 xassert (matrix
&& matrix
->rows
);
1675 xassert (row
>= 0 && row
< matrix
->nrows
);
1677 /* That's really too slow for normal testing because this function
1678 is called almost everywhere. Although---it's still astonishingly
1679 fast, so it is valuable to have for debugging purposes. */
1681 check_matrix_pointer_lossage (matrix
);
1684 return matrix
->rows
+ row
;
1688 #if 0 /* This function makes invalid assumptions when text is
1689 partially invisible. But it might come handy for debugging
1692 /* Check invariants that must hold for an up to date current matrix of
1696 check_matrix_invariants (w
)
1699 struct glyph_matrix
*matrix
= w
->current_matrix
;
1700 int yb
= window_text_bottom_y (w
);
1701 struct glyph_row
*row
= matrix
->rows
;
1702 struct glyph_row
*last_text_row
= NULL
;
1703 struct buffer
*saved
= current_buffer
;
1704 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1707 /* This can sometimes happen for a fresh window. */
1708 if (matrix
->nrows
< 2)
1711 set_buffer_temp (buffer
);
1713 /* Note: last row is always reserved for the mode line. */
1714 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1715 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1717 struct glyph_row
*next
= row
+ 1;
1719 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1720 last_text_row
= row
;
1722 /* Check that character and byte positions are in sync. */
1723 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1724 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1726 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1727 have such a position temporarily in case of a minibuffer
1728 displaying something like `[Sole completion]' at its end. */
1729 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1730 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1731 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1733 /* Check that end position of `row' is equal to start position
1735 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1737 xassert (MATRIX_ROW_END_CHARPOS (row
)
1738 == MATRIX_ROW_START_CHARPOS (next
));
1739 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1740 == MATRIX_ROW_START_BYTEPOS (next
));
1745 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1746 xassert (w
->desired_matrix
->rows
!= NULL
);
1747 set_buffer_temp (saved
);
1752 #endif /* GLYPH_DEBUG != 0 */
1756 /**********************************************************************
1757 Allocating/ Adjusting Glyph Matrices
1758 **********************************************************************/
1760 /* Allocate glyph matrices over a window tree for a frame-based
1763 X and Y are column/row within the frame glyph matrix where
1764 sub-matrices for the window tree rooted at WINDOW must be
1765 allocated. CH_DIM contains the dimensions of the smallest
1766 character that could be used during display. DIM_ONLY_P non-zero
1767 means that the caller of this function is only interested in the
1768 result matrix dimension, and matrix adjustments should not be
1771 The function returns the total width/height of the sub-matrices of
1772 the window tree. If called on a frame root window, the computation
1773 will take the mini-buffer window into account.
1775 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1777 NEW_LEAF_MATRIX set if any window in the tree did not have a
1778 glyph matrices yet, and
1780 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1781 any window in the tree will be changed or have been changed (see
1784 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1787 Windows are arranged into chains of windows on the same level
1788 through the next fields of window structures. Such a level can be
1789 either a sequence of horizontally adjacent windows from left to
1790 right, or a sequence of vertically adjacent windows from top to
1791 bottom. Each window in a horizontal sequence can be either a leaf
1792 window or a vertical sequence; a window in a vertical sequence can
1793 be either a leaf or a horizontal sequence. All windows in a
1794 horizontal sequence have the same height, and all windows in a
1795 vertical sequence have the same width.
1797 This function uses, for historical reasons, a more general
1798 algorithm to determine glyph matrix dimensions that would be
1801 The matrix height of a horizontal sequence is determined by the
1802 maximum height of any matrix in the sequence. The matrix width of
1803 a horizontal sequence is computed by adding up matrix widths of
1804 windows in the sequence.
1806 |<------- result width ------->|
1807 +---------+----------+---------+ ---
1810 +---------+ | | result height
1815 The matrix width of a vertical sequence is the maximum matrix width
1816 of any window in the sequence. Its height is computed by adding up
1817 matrix heights of windows in the sequence.
1819 |<---- result width -->|
1827 +------------+---------+ |
1830 +------------+---------+ --- */
1832 /* Bit indicating that a new matrix will be allocated or has been
1835 #define NEW_LEAF_MATRIX (1 << 0)
1837 /* Bit indicating that a matrix will or has changed its location or
1840 #define CHANGED_LEAF_MATRIX (1 << 1)
1843 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1844 dim_only_p
, window_change_flags
)
1849 int *window_change_flags
;
1851 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1853 int wmax
= 0, hmax
= 0;
1857 int in_horz_combination_p
;
1859 /* What combination is WINDOW part of? Compute this once since the
1860 result is the same for all windows in the `next' chain. The
1861 special case of a root window (parent equal to nil) is treated
1862 like a vertical combination because a root window's `next'
1863 points to the mini-buffer window, if any, which is arranged
1864 vertically below other windows. */
1865 in_horz_combination_p
1866 = (!NILP (XWINDOW (window
)->parent
)
1867 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1869 /* For WINDOW and all windows on the same level. */
1872 w
= XWINDOW (window
);
1874 /* Get the dimension of the window sub-matrix for W, depending
1875 on whether this a combination or a leaf window. */
1876 if (!NILP (w
->hchild
))
1877 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1879 window_change_flags
);
1880 else if (!NILP (w
->vchild
))
1881 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1883 window_change_flags
);
1886 /* If not already done, allocate sub-matrix structures. */
1887 if (w
->desired_matrix
== NULL
)
1889 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1890 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1891 *window_change_flags
|= NEW_LEAF_MATRIX
;
1894 /* Width and height MUST be chosen so that there are no
1895 holes in the frame matrix. */
1896 dim
.width
= XINT (w
->width
);
1897 dim
.height
= XINT (w
->height
);
1899 /* Will matrix be re-allocated? */
1900 if (x
!= w
->desired_matrix
->matrix_x
1901 || y
!= w
->desired_matrix
->matrix_y
1902 || dim
.width
!= w
->desired_matrix
->matrix_w
1903 || dim
.height
!= w
->desired_matrix
->matrix_h
1904 || (margin_glyphs_to_reserve (w
, dim
.width
,
1905 w
->right_margin_width
)
1906 != w
->desired_matrix
->left_margin_glyphs
)
1907 || (margin_glyphs_to_reserve (w
, dim
.width
,
1908 w
->left_margin_width
)
1909 != w
->desired_matrix
->right_margin_glyphs
))
1910 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1912 /* Actually change matrices, if allowed. Do not consider
1913 CHANGED_LEAF_MATRIX computed above here because the pool
1914 may have been changed which we don't now here. We trust
1915 that we only will be called with DIM_ONLY_P != 0 when
1919 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1920 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1924 /* If we are part of a horizontal combination, advance x for
1925 windows to the right of W; otherwise advance y for windows
1927 if (in_horz_combination_p
)
1932 /* Remember maximum glyph matrix dimensions. */
1933 wmax
= max (wmax
, dim
.width
);
1934 hmax
= max (hmax
, dim
.height
);
1936 /* Next window on same level. */
1939 while (!NILP (window
));
1941 /* Set `total' to the total glyph matrix dimension of this window
1942 level. In a vertical combination, the width is the width of the
1943 widest window; the height is the y we finally reached, corrected
1944 by the y we started with. In a horizontal combination, the total
1945 height is the height of the tallest window, and the width is the
1946 x we finally reached, corrected by the x we started with. */
1947 if (in_horz_combination_p
)
1949 total
.width
= x
- x0
;
1950 total
.height
= hmax
;
1955 total
.height
= y
- y0
;
1962 /* Allocate window matrices for window-based redisplay. W is the
1963 window whose matrices must be allocated/reallocated. CH_DIM is the
1964 size of the smallest character that could potentially be used on W. */
1967 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1971 struct frame
*f
= XFRAME (w
->frame
);
1975 if (!NILP (w
->vchild
))
1976 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1977 else if (!NILP (w
->hchild
))
1978 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1981 /* W is a leaf window. */
1982 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
1983 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1986 /* If matrices are not yet allocated, allocate them now. */
1987 if (w
->desired_matrix
== NULL
)
1989 w
->desired_matrix
= new_glyph_matrix (NULL
);
1990 w
->current_matrix
= new_glyph_matrix (NULL
);
1993 /* Compute number of glyphs needed in a glyph row. */
1994 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
1996 /* 2 partially visible columns in the text area. */
1998 /* One partially visible column at the right
1999 edge of each marginal area. */
2002 /* Compute number of glyph rows needed. */
2003 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
2005 /* One partially visible line at the top and
2006 bottom of the window. */
2008 /* 2 for top and mode line. */
2011 /* Change matrices. */
2012 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2013 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2016 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2021 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2022 do it for all frames; otherwise do it just for the given frame.
2023 This function must be called when a new frame is created, its size
2024 changes, or its window configuration changes. */
2030 /* Block input so that expose events and other events that access
2031 glyph matrices are not processed while we are changing them. */
2035 adjust_frame_glyphs (f
);
2038 Lisp_Object tail
, lisp_frame
;
2040 FOR_EACH_FRAME (tail
, lisp_frame
)
2041 adjust_frame_glyphs (XFRAME (lisp_frame
));
2048 /* Adjust frame glyphs when Emacs is initialized.
2050 To be called from init_display.
2052 We need a glyph matrix because redraw will happen soon.
2053 Unfortunately, window sizes on selected_frame are not yet set to
2054 meaningful values. I believe we can assume that there are only two
2055 windows on the frame---the mini-buffer and the root window. Frame
2056 height and width seem to be correct so far. So, set the sizes of
2057 windows to estimated values. */
2060 adjust_frame_glyphs_initially ()
2062 struct frame
*sf
= SELECTED_FRAME ();
2063 struct window
*root
= XWINDOW (sf
->root_window
);
2064 struct window
*mini
= XWINDOW (root
->next
);
2065 int frame_height
= FRAME_HEIGHT (sf
);
2066 int frame_width
= FRAME_WIDTH (sf
);
2067 int top_margin
= FRAME_TOP_MARGIN (sf
);
2069 /* Do it for the root window. */
2070 XSETFASTINT (root
->top
, top_margin
);
2071 XSETFASTINT (root
->width
, frame_width
);
2072 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
2074 /* Do it for the mini-buffer window. */
2075 XSETFASTINT (mini
->top
, frame_height
- 1);
2076 XSETFASTINT (mini
->width
, frame_width
);
2077 set_window_height (root
->next
, 1, 0);
2079 adjust_frame_glyphs (sf
);
2080 glyphs_initialized_initially_p
= 1;
2084 /* Allocate/reallocate glyph matrices of a single frame F. */
2087 adjust_frame_glyphs (f
)
2090 if (FRAME_WINDOW_P (f
))
2091 adjust_frame_glyphs_for_window_redisplay (f
);
2093 adjust_frame_glyphs_for_frame_redisplay (f
);
2095 /* Don't forget the message buffer and the buffer for
2096 decode_mode_spec. */
2097 adjust_frame_message_buffer (f
);
2098 adjust_decode_mode_spec_buffer (f
);
2100 f
->glyphs_initialized_p
= 1;
2104 /* In the window tree with root W, build current matrices of leaf
2105 windows from the frame's current matrix. */
2108 fake_current_matrices (window
)
2113 for (; !NILP (window
); window
= w
->next
)
2115 w
= XWINDOW (window
);
2117 if (!NILP (w
->hchild
))
2118 fake_current_matrices (w
->hchild
);
2119 else if (!NILP (w
->vchild
))
2120 fake_current_matrices (w
->vchild
);
2124 struct frame
*f
= XFRAME (w
->frame
);
2125 struct glyph_matrix
*m
= w
->current_matrix
;
2126 struct glyph_matrix
*fm
= f
->current_matrix
;
2128 xassert (m
->matrix_h
== XFASTINT (w
->height
));
2129 xassert (m
->matrix_w
== XFASTINT (w
->width
));
2131 for (i
= 0; i
< m
->matrix_h
; ++i
)
2133 struct glyph_row
*r
= m
->rows
+ i
;
2134 struct glyph_row
*fr
= fm
->rows
+ i
+ XFASTINT (w
->top
);
2136 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2137 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2139 r
->enabled_p
= fr
->enabled_p
;
2142 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2143 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2144 r
->used
[TEXT_AREA
] = (m
->matrix_w
2145 - r
->used
[LEFT_MARGIN_AREA
]
2146 - r
->used
[RIGHT_MARGIN_AREA
]);
2148 r
->inverse_p
= fr
->inverse_p
;
2156 /* Save or restore the contents of frame F's current frame matrix.
2157 SAVE_P non-zero means save it. */
2160 save_or_restore_current_matrix (f
, save_p
)
2164 struct glyph_row
*from
, *to
, *end
;
2168 from
= f
->current_matrix
->rows
;
2169 end
= from
+ f
->current_matrix
->nrows
;
2170 to
= f
->desired_matrix
->rows
;
2174 from
= f
->desired_matrix
->rows
;
2175 end
= from
+ f
->desired_matrix
->nrows
;
2176 to
= f
->current_matrix
->rows
;
2179 for (; from
< end
; ++from
, ++to
)
2181 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2182 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2183 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2188 /* Allocate/reallocate glyph matrices of a single frame F for
2189 frame-based redisplay. */
2192 adjust_frame_glyphs_for_frame_redisplay (f
)
2196 struct dim matrix_dim
;
2198 int window_change_flags
;
2201 if (!FRAME_LIVE_P (f
))
2204 /* Determine the smallest character in any font for F. On
2205 console windows, all characters have dimension (1, 1). */
2206 ch_dim
.width
= ch_dim
.height
= 1;
2208 top_window_y
= FRAME_TOP_MARGIN (f
);
2210 /* Allocate glyph pool structures if not already done. */
2211 if (f
->desired_pool
== NULL
)
2213 f
->desired_pool
= new_glyph_pool ();
2214 f
->current_pool
= new_glyph_pool ();
2217 /* Allocate frames matrix structures if needed. */
2218 if (f
->desired_matrix
== NULL
)
2220 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2221 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2224 /* Compute window glyph matrices. (This takes the mini-buffer
2225 window into account). The result is the size of the frame glyph
2226 matrix needed. The variable window_change_flags is set to a bit
2227 mask indicating whether new matrices will be allocated or
2228 existing matrices change their size or location within the frame
2230 window_change_flags
= 0;
2232 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2235 &window_change_flags
);
2237 /* Add in menu bar lines, if any. */
2238 matrix_dim
.height
+= top_window_y
;
2240 /* Enlarge pools as necessary. */
2241 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2242 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2244 /* Set up glyph pointers within window matrices. Do this only if
2245 absolutely necessary since it requires a frame redraw. */
2246 if (pool_changed_p
|| window_change_flags
)
2248 /* Do it for window matrices. */
2249 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2250 0, top_window_y
, ch_dim
, 0,
2251 &window_change_flags
);
2253 /* Size of frame matrices must equal size of frame. Note
2254 that we are called for X frames with window widths NOT equal
2255 to the frame width (from CHANGE_FRAME_SIZE_1). */
2256 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2257 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2259 /* Resize frame matrices. */
2260 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2262 /* Pointers to glyph memory in glyph rows are exchanged during
2263 the update phase of redisplay, which means in general that a
2264 frame's current matrix consists of pointers into both the
2265 desired and current glyph pool of the frame. Adjusting a
2266 matrix sets the frame matrix up so that pointers are all into
2267 the same pool. If we want to preserve glyph contents of the
2268 current matrix over a call to adjust_glyph_matrix, we must
2269 make a copy of the current glyphs, and restore the current
2270 matrix' contents from that copy. */
2271 if (display_completed
2272 && !FRAME_GARBAGED_P (f
)
2273 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2274 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2276 save_or_restore_current_matrix (f
, 1);
2277 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2278 save_or_restore_current_matrix (f
, 0);
2279 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2283 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2284 SET_FRAME_GARBAGED (f
);
2290 /* Allocate/reallocate glyph matrices of a single frame F for
2291 window-based redisplay. */
2294 adjust_frame_glyphs_for_window_redisplay (f
)
2300 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2302 /* Get minimum sizes. */
2303 #ifdef HAVE_WINDOW_SYSTEM
2304 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2305 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2307 ch_dim
.width
= ch_dim
.height
= 1;
2310 /* Allocate/reallocate window matrices. */
2311 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2314 /* Allocate/ reallocate matrices of the dummy window used to display
2315 the menu bar under X when no X toolkit support is available. */
2316 #ifndef USE_X_TOOLKIT
2318 /* Allocate a dummy window if not already done. */
2319 if (NILP (f
->menu_bar_window
))
2321 f
->menu_bar_window
= make_window ();
2322 w
= XWINDOW (f
->menu_bar_window
);
2323 XSETFRAME (w
->frame
, f
);
2324 w
->pseudo_window_p
= 1;
2327 w
= XWINDOW (f
->menu_bar_window
);
2329 /* Set window dimensions to frame dimensions and allocate or
2330 adjust glyph matrices of W. */
2331 XSETFASTINT (w
->top
, 0);
2332 XSETFASTINT (w
->left
, 0);
2333 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2334 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2335 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2337 #endif /* not USE_X_TOOLKIT */
2339 /* Allocate/ reallocate matrices of the tool bar window. If we
2340 don't have a tool bar window yet, make one. */
2341 if (NILP (f
->tool_bar_window
))
2343 f
->tool_bar_window
= make_window ();
2344 w
= XWINDOW (f
->tool_bar_window
);
2345 XSETFRAME (w
->frame
, f
);
2346 w
->pseudo_window_p
= 1;
2349 w
= XWINDOW (f
->tool_bar_window
);
2351 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2352 XSETFASTINT (w
->left
, 0);
2353 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2354 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2355 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2359 /* Adjust/ allocate message buffer of frame F.
2361 Note that the message buffer is never freed. Since I could not
2362 find a free in 19.34, I assume that freeing it would be
2363 problematic in some way and don't do it either.
2365 (Implementation note: It should be checked if we can free it
2366 eventually without causing trouble). */
2369 adjust_frame_message_buffer (f
)
2372 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2374 if (FRAME_MESSAGE_BUF (f
))
2376 char *buffer
= FRAME_MESSAGE_BUF (f
);
2377 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2378 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2381 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2385 /* Re-allocate buffer for decode_mode_spec on frame F. */
2388 adjust_decode_mode_spec_buffer (f
)
2391 f
->decode_mode_spec_buffer
2392 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2393 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2398 /**********************************************************************
2399 Freeing Glyph Matrices
2400 **********************************************************************/
2402 /* Free glyph memory for a frame F. F may be null. This function can
2403 be called for the same frame more than once. The root window of
2404 F may be nil when this function is called. This is the case when
2405 the function is called when F is destroyed. */
2411 if (f
&& f
->glyphs_initialized_p
)
2413 /* Block interrupt input so that we don't get surprised by an X
2414 event while we're in an inconsistent state. */
2416 f
->glyphs_initialized_p
= 0;
2418 /* Release window sub-matrices. */
2419 if (!NILP (f
->root_window
))
2420 free_window_matrices (XWINDOW (f
->root_window
));
2422 /* Free the dummy window for menu bars without X toolkit and its
2424 if (!NILP (f
->menu_bar_window
))
2426 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2427 free_glyph_matrix (w
->desired_matrix
);
2428 free_glyph_matrix (w
->current_matrix
);
2429 w
->desired_matrix
= w
->current_matrix
= NULL
;
2430 f
->menu_bar_window
= Qnil
;
2433 /* Free the tool bar window and its glyph matrices. */
2434 if (!NILP (f
->tool_bar_window
))
2436 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2437 free_glyph_matrix (w
->desired_matrix
);
2438 free_glyph_matrix (w
->current_matrix
);
2439 w
->desired_matrix
= w
->current_matrix
= NULL
;
2440 f
->tool_bar_window
= Qnil
;
2443 /* Release frame glyph matrices. Reset fields to zero in
2444 case we are called a second time. */
2445 if (f
->desired_matrix
)
2447 free_glyph_matrix (f
->desired_matrix
);
2448 free_glyph_matrix (f
->current_matrix
);
2449 f
->desired_matrix
= f
->current_matrix
= NULL
;
2452 /* Release glyph pools. */
2453 if (f
->desired_pool
)
2455 free_glyph_pool (f
->desired_pool
);
2456 free_glyph_pool (f
->current_pool
);
2457 f
->desired_pool
= f
->current_pool
= NULL
;
2465 /* Free glyph sub-matrices in the window tree rooted at W. This
2466 function may be called with a null pointer, and it may be called on
2467 the same tree more than once. */
2470 free_window_matrices (w
)
2475 if (!NILP (w
->hchild
))
2476 free_window_matrices (XWINDOW (w
->hchild
));
2477 else if (!NILP (w
->vchild
))
2478 free_window_matrices (XWINDOW (w
->vchild
));
2481 /* This is a leaf window. Free its memory and reset fields
2482 to zero in case this function is called a second time for
2484 free_glyph_matrix (w
->current_matrix
);
2485 free_glyph_matrix (w
->desired_matrix
);
2486 w
->current_matrix
= w
->desired_matrix
= NULL
;
2489 /* Next window on same level. */
2490 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2495 /* Check glyph memory leaks. This function is called from
2496 shut_down_emacs. Note that frames are not destroyed when Emacs
2497 exits. We therefore free all glyph memory for all active frames
2498 explicitly and check that nothing is left allocated. */
2501 check_glyph_memory ()
2503 Lisp_Object tail
, frame
;
2505 /* Free glyph memory for all frames. */
2506 FOR_EACH_FRAME (tail
, frame
)
2507 free_glyphs (XFRAME (frame
));
2509 /* Check that nothing is left allocated. */
2510 if (glyph_matrix_count
)
2512 if (glyph_pool_count
)
2518 /**********************************************************************
2519 Building a Frame Matrix
2520 **********************************************************************/
2522 /* Most of the redisplay code works on glyph matrices attached to
2523 windows. This is a good solution most of the time, but it is not
2524 suitable for terminal code. Terminal output functions cannot rely
2525 on being able to set an arbitrary terminal window. Instead they
2526 must be provided with a view of the whole frame, i.e. the whole
2527 screen. We build such a view by constructing a frame matrix from
2528 window matrices in this section.
2530 Windows that must be updated have their must_be_update_p flag set.
2531 For all such windows, their desired matrix is made part of the
2532 desired frame matrix. For other windows, their current matrix is
2533 made part of the desired frame matrix.
2535 +-----------------+----------------+
2536 | desired | desired |
2538 +-----------------+----------------+
2541 +----------------------------------+
2543 Desired window matrices can be made part of the frame matrix in a
2544 cheap way: We exploit the fact that the desired frame matrix and
2545 desired window matrices share their glyph memory. This is not
2546 possible for current window matrices. Their glyphs are copied to
2547 the desired frame matrix. The latter is equivalent to
2548 preserve_other_columns in the old redisplay.
2550 Used glyphs counters for frame matrix rows are the result of adding
2551 up glyph lengths of the window matrices. A line in the frame
2552 matrix is enabled, if a corresponding line in a window matrix is
2555 After building the desired frame matrix, it will be passed to
2556 terminal code, which will manipulate both the desired and current
2557 frame matrix. Changes applied to the frame's current matrix have
2558 to be visible in current window matrices afterwards, of course.
2560 This problem is solved like this:
2562 1. Window and frame matrices share glyphs. Window matrices are
2563 constructed in a way that their glyph contents ARE the glyph
2564 contents needed in a frame matrix. Thus, any modification of
2565 glyphs done in terminal code will be reflected in window matrices
2568 2. Exchanges of rows in a frame matrix done by terminal code are
2569 intercepted by hook functions so that corresponding row operations
2570 on window matrices can be performed. This is necessary because we
2571 use pointers to glyphs in glyph row structures. To satisfy the
2572 assumption of point 1 above that glyphs are updated implicitly in
2573 window matrices when they are manipulated via the frame matrix,
2574 window and frame matrix must of course agree where to find the
2575 glyphs for their rows. Possible manipulations that must be
2576 mirrored are assignments of rows of the desired frame matrix to the
2577 current frame matrix and scrolling the current frame matrix. */
2579 /* Build frame F's desired matrix from window matrices. Only windows
2580 which have the flag must_be_updated_p set have to be updated. Menu
2581 bar lines of a frame are not covered by window matrices, so make
2582 sure not to touch them in this function. */
2585 build_frame_matrix (f
)
2590 /* F must have a frame matrix when this function is called. */
2591 xassert (!FRAME_WINDOW_P (f
));
2593 /* Clear all rows in the frame matrix covered by window matrices.
2594 Menu bar lines are not covered by windows. */
2595 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2596 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2598 /* Build the matrix by walking the window tree. */
2599 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2600 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2604 /* Walk a window tree, building a frame matrix MATRIX from window
2605 matrices. W is the root of a window tree. */
2608 build_frame_matrix_from_window_tree (matrix
, w
)
2609 struct glyph_matrix
*matrix
;
2614 if (!NILP (w
->hchild
))
2615 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2616 else if (!NILP (w
->vchild
))
2617 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2619 build_frame_matrix_from_leaf_window (matrix
, w
);
2621 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2626 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2627 desired frame matrix built. W is a leaf window whose desired or
2628 current matrix is to be added to FRAME_MATRIX. W's flag
2629 must_be_updated_p determines which matrix it contributes to
2630 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2631 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2632 Adding a desired matrix means setting up used counters and such in
2633 frame rows, while adding a current window matrix to FRAME_MATRIX
2634 means copying glyphs. The latter case corresponds to
2635 preserve_other_columns in the old redisplay. */
2638 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2639 struct glyph_matrix
*frame_matrix
;
2642 struct glyph_matrix
*window_matrix
;
2643 int window_y
, frame_y
;
2644 /* If non-zero, a glyph to insert at the right border of W. */
2645 GLYPH right_border_glyph
= 0;
2647 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2648 if (w
->must_be_updated_p
)
2650 window_matrix
= w
->desired_matrix
;
2652 /* Decide whether we want to add a vertical border glyph. */
2653 if (!WINDOW_RIGHTMOST_P (w
))
2655 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2656 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2657 ? XINT (DISP_BORDER_GLYPH (dp
))
2662 window_matrix
= w
->current_matrix
;
2664 /* For all rows in the window matrix and corresponding rows in the
2667 frame_y
= window_matrix
->matrix_y
;
2668 while (window_y
< window_matrix
->nrows
)
2670 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2671 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2672 int current_row_p
= window_matrix
== w
->current_matrix
;
2674 /* Fill up the frame row with spaces up to the left margin of the
2676 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2678 /* Fill up areas in the window matrix row with spaces. */
2679 fill_up_glyph_row_with_spaces (window_row
);
2681 /* If only part of W's desired matrix has been built, and
2682 window_row wasn't displayed, use the corresponding current
2684 if (window_matrix
== w
->desired_matrix
2685 && !window_row
->enabled_p
)
2687 window_row
= w
->current_matrix
->rows
+ window_y
;
2693 /* Copy window row to frame row. */
2694 bcopy (window_row
->glyphs
[0],
2695 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2696 window_matrix
->matrix_w
* sizeof (struct glyph
));
2700 xassert (window_row
->enabled_p
);
2702 /* Only when a desired row has been displayed, we want
2703 the corresponding frame row to be updated. */
2704 frame_row
->enabled_p
= 1;
2706 /* Maybe insert a vertical border between horizontally adjacent
2708 if (right_border_glyph
)
2710 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2711 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2714 /* Window row window_y must be a slice of frame row
2716 xassert (glyph_row_slice_p (window_row
, frame_row
));
2718 /* If rows are in sync, we don't have to copy glyphs because
2719 frame and window share glyphs. */
2722 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2723 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2727 /* Set number of used glyphs in the frame matrix. Since we fill
2728 up with spaces, and visit leaf windows from left to right it
2729 can be done simply. */
2730 frame_row
->used
[TEXT_AREA
]
2731 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2733 /* Or in other flags. */
2734 frame_row
->inverse_p
|= window_row
->inverse_p
;
2743 /* Add spaces to a glyph row ROW in a window matrix.
2745 Each row has the form:
2747 +---------+-----------------------------+------------+
2748 | left | text | right |
2749 +---------+-----------------------------+------------+
2751 Left and right marginal areas are optional. This function adds
2752 spaces to areas so that there are no empty holes between areas.
2753 In other words: If the right area is not empty, the text area
2754 is filled up with spaces up to the right area. If the text area
2755 is not empty, the left area is filled up.
2757 To be called for frame-based redisplay, only. */
2760 fill_up_glyph_row_with_spaces (row
)
2761 struct glyph_row
*row
;
2763 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2764 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2765 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2769 /* Fill area AREA of glyph row ROW with spaces. To be called for
2770 frame-based redisplay only. */
2773 fill_up_glyph_row_area_with_spaces (row
, area
)
2774 struct glyph_row
*row
;
2777 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2779 struct glyph
*end
= row
->glyphs
[area
+ 1];
2780 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2783 *text
++ = space_glyph
;
2784 row
->used
[area
] = text
- row
->glyphs
[area
];
2789 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2790 reached. In frame matrices only one area, TEXT_AREA, is used. */
2793 fill_up_frame_row_with_spaces (row
, upto
)
2794 struct glyph_row
*row
;
2797 int i
= row
->used
[TEXT_AREA
];
2798 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2801 glyph
[i
++] = space_glyph
;
2803 row
->used
[TEXT_AREA
] = i
;
2808 /**********************************************************************
2809 Mirroring operations on frame matrices in window matrices
2810 **********************************************************************/
2812 /* Set frame being updated via frame-based redisplay to F. This
2813 function must be called before updates to make explicit that we are
2814 working on frame matrices or not. */
2817 set_frame_matrix_frame (f
)
2820 frame_matrix_frame
= f
;
2824 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2825 DESIRED_MATRIX is the desired matrix corresponding to
2826 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2827 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2828 frame_matrix_frame is non-null, this indicates that the exchange is
2829 done in frame matrices, and that we have to perform analogous
2830 operations in window matrices of frame_matrix_frame. */
2833 make_current (desired_matrix
, current_matrix
, row
)
2834 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2837 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2838 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2839 int mouse_face_p
= current_row
->mouse_face_p
;
2841 /* Do current_row = desired_row. This exchanges glyph pointers
2842 between both rows, and does a structure assignment otherwise. */
2843 assign_row (current_row
, desired_row
);
2845 /* Enable current_row to mark it as valid. */
2846 current_row
->enabled_p
= 1;
2847 current_row
->mouse_face_p
= mouse_face_p
;
2849 /* If we are called on frame matrices, perform analogous operations
2850 for window matrices. */
2851 if (frame_matrix_frame
)
2852 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2856 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2857 W's frame which has been made current (by swapping pointers between
2858 current and desired matrix). Perform analogous operations in the
2859 matrices of leaf windows in the window tree rooted at W. */
2862 mirror_make_current (w
, frame_row
)
2868 if (!NILP (w
->hchild
))
2869 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2870 else if (!NILP (w
->vchild
))
2871 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2874 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2875 here because the checks performed in debug mode there
2876 will not allow the conversion. */
2877 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2879 /* If FRAME_ROW is within W, assign the desired row to the
2880 current row (exchanging glyph pointers). */
2881 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2883 struct glyph_row
*current_row
2884 = MATRIX_ROW (w
->current_matrix
, row
);
2885 struct glyph_row
*desired_row
2886 = MATRIX_ROW (w
->desired_matrix
, row
);
2888 if (desired_row
->enabled_p
)
2889 assign_row (current_row
, desired_row
);
2891 swap_glyph_pointers (desired_row
, current_row
);
2892 current_row
->enabled_p
= 1;
2896 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2901 /* Perform row dance after scrolling. We are working on the range of
2902 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2903 including) in MATRIX. COPY_FROM is a vector containing, for each
2904 row I in the range 0 <= I < NLINES, the index of the original line
2905 to move to I. This index is relative to the row range, i.e. 0 <=
2906 index < NLINES. RETAINED_P is a vector containing zero for each
2907 row 0 <= I < NLINES which is empty.
2909 This function is called from do_scrolling and do_direct_scrolling. */
2912 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2914 struct glyph_matrix
*matrix
;
2915 int unchanged_at_top
, nlines
;
2919 /* A copy of original rows. */
2920 struct glyph_row
*old_rows
;
2922 /* Rows to assign to. */
2923 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2927 /* Make a copy of the original rows. */
2928 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2929 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2931 /* Assign new rows, maybe clear lines. */
2932 for (i
= 0; i
< nlines
; ++i
)
2934 int enabled_before_p
= new_rows
[i
].enabled_p
;
2936 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2937 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2938 new_rows
[i
] = old_rows
[copy_from
[i
]];
2939 new_rows
[i
].enabled_p
= enabled_before_p
;
2941 /* RETAINED_P is zero for empty lines. */
2942 if (!retained_p
[copy_from
[i
]])
2943 new_rows
[i
].enabled_p
= 0;
2946 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2947 if (frame_matrix_frame
)
2948 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2949 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2953 /* Synchronize glyph pointers in the current matrix of window W with
2954 the current frame matrix. W must be full-width, and be on a tty
2958 sync_window_with_frame_matrix_rows (w
)
2961 struct frame
*f
= XFRAME (w
->frame
);
2962 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2964 /* Preconditions: W must be a leaf window and full-width. Its frame
2965 must have a frame matrix. */
2966 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2967 xassert (WINDOW_FULL_WIDTH_P (w
));
2968 xassert (!FRAME_WINDOW_P (f
));
2970 /* If W is a full-width window, glyph pointers in W's current matrix
2971 have, by definition, to be the same as glyph pointers in the
2972 corresponding frame matrix. */
2973 window_row
= w
->current_matrix
->rows
;
2974 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2975 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
2976 while (window_row
< window_row_end
)
2980 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
2981 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
2983 ++window_row
, ++frame_row
;
2988 /* Return the window in the window tree rooted in W containing frame
2989 row ROW. Value is null if none is found. */
2992 frame_row_to_window (w
, row
)
2996 struct window
*found
= NULL
;
3000 if (!NILP (w
->hchild
))
3001 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3002 else if (!NILP (w
->vchild
))
3003 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3004 else if (row
>= XFASTINT (w
->top
)
3005 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
3008 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3015 /* Perform a line dance in the window tree rooted at W, after
3016 scrolling a frame matrix in mirrored_line_dance.
3018 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3019 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3020 COPY_FROM is a vector containing, for each row I in the range 0 <=
3021 I < NLINES, the index of the original line to move to I. This
3022 index is relative to the row range, i.e. 0 <= index < NLINES.
3023 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3027 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3029 int unchanged_at_top
, nlines
;
3035 if (!NILP (w
->hchild
))
3036 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3037 nlines
, copy_from
, retained_p
);
3038 else if (!NILP (w
->vchild
))
3039 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3040 nlines
, copy_from
, retained_p
);
3043 /* W is a leaf window, and we are working on its current
3045 struct glyph_matrix
*m
= w
->current_matrix
;
3047 struct glyph_row
*old_rows
;
3049 /* Make a copy of the original rows of matrix m. */
3050 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3051 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3053 for (i
= 0; i
< nlines
; ++i
)
3055 /* Frame relative line assigned to. */
3056 int frame_to
= i
+ unchanged_at_top
;
3058 /* Frame relative line assigned. */
3059 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3061 /* Window relative line assigned to. */
3062 int window_to
= frame_to
- m
->matrix_y
;
3064 /* Window relative line assigned. */
3065 int window_from
= frame_from
- m
->matrix_y
;
3067 /* Is assigned line inside window? */
3068 int from_inside_window_p
3069 = window_from
>= 0 && window_from
< m
->matrix_h
;
3071 /* Is assigned to line inside window? */
3072 int to_inside_window_p
3073 = window_to
>= 0 && window_to
< m
->matrix_h
;
3075 if (from_inside_window_p
&& to_inside_window_p
)
3077 /* Enabled setting before assignment. */
3078 int enabled_before_p
;
3080 /* Do the assignment. The enabled_p flag is saved
3081 over the assignment because the old redisplay did
3083 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3084 m
->rows
[window_to
] = old_rows
[window_from
];
3085 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3087 /* If frame line is empty, window line is empty, too. */
3088 if (!retained_p
[copy_from
[i
]])
3089 m
->rows
[window_to
].enabled_p
= 0;
3091 else if (to_inside_window_p
)
3093 /* A copy between windows. This is an infrequent
3094 case not worth optimizing. */
3095 struct frame
*f
= XFRAME (w
->frame
);
3096 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3098 struct glyph_matrix
*m2
;
3101 w2
= frame_row_to_window (root
, frame_to
);
3102 m2
= w2
->current_matrix
;
3103 m2_from
= frame_from
- m2
->matrix_y
;
3104 copy_row_except_pointers (m
->rows
+ window_to
,
3105 m2
->rows
+ m2_from
);
3107 /* If frame line is empty, window line is empty, too. */
3108 if (!retained_p
[copy_from
[i
]])
3109 m
->rows
[window_to
].enabled_p
= 0;
3112 else if (from_inside_window_p
)
3116 /* If there was a copy between windows, make sure glyph
3117 pointers are in sync with the frame matrix. */
3119 sync_window_with_frame_matrix_rows (w
);
3121 /* Check that no pointers are lost. */
3125 /* Next window on same level. */
3126 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3133 /* Check that window and frame matrices agree about their
3134 understanding where glyphs of the rows are to find. For each
3135 window in the window tree rooted at W, check that rows in the
3136 matrices of leaf window agree with their frame matrices about
3140 check_window_matrix_pointers (w
)
3145 if (!NILP (w
->hchild
))
3146 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3147 else if (!NILP (w
->vchild
))
3148 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3151 struct frame
*f
= XFRAME (w
->frame
);
3152 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3153 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3156 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3161 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3162 a window and FRAME_MATRIX is the corresponding frame matrix. For
3163 each row in WINDOW_MATRIX check that it's a slice of the
3164 corresponding frame row. If it isn't, abort. */
3167 check_matrix_pointers (window_matrix
, frame_matrix
)
3168 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3170 /* Row number in WINDOW_MATRIX. */
3173 /* Row number corresponding to I in FRAME_MATRIX. */
3174 int j
= window_matrix
->matrix_y
;
3176 /* For all rows check that the row in the window matrix is a
3177 slice of the row in the frame matrix. If it isn't we didn't
3178 mirror an operation on the frame matrix correctly. */
3179 while (i
< window_matrix
->nrows
)
3181 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3182 frame_matrix
->rows
+ j
))
3188 #endif /* GLYPH_DEBUG != 0 */
3192 /**********************************************************************
3193 VPOS and HPOS translations
3194 **********************************************************************/
3198 /* Translate vertical position VPOS which is relative to window W to a
3199 vertical position relative to W's frame. */
3202 window_to_frame_vpos (w
, vpos
)
3206 struct frame
*f
= XFRAME (w
->frame
);
3208 xassert (!FRAME_WINDOW_P (f
));
3209 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3210 vpos
+= XFASTINT (w
->top
);
3211 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3216 /* Translate horizontal position HPOS which is relative to window W to
3217 a vertical position relative to W's frame. */
3220 window_to_frame_hpos (w
, hpos
)
3224 struct frame
*f
= XFRAME (w
->frame
);
3226 xassert (!FRAME_WINDOW_P (f
));
3227 hpos
+= XFASTINT (w
->left
);
3231 #endif /* GLYPH_DEBUG */
3235 /**********************************************************************
3237 **********************************************************************/
3239 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3240 "Clear frame FRAME and output again what is supposed to appear on it.")
3246 CHECK_LIVE_FRAME (frame
, 0);
3249 /* Ignore redraw requests, if frame has no glyphs yet.
3250 (Implementation note: It still has to be checked why we are
3251 called so early here). */
3252 if (!glyphs_initialized_initially_p
)
3256 if (FRAME_MSDOS_P (f
))
3257 set_terminal_modes ();
3259 clear_current_matrices (f
);
3262 windows_or_buffers_changed
++;
3263 /* Mark all windows as inaccurate, so that every window will have
3264 its redisplay done. */
3265 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3266 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3272 /* Redraw frame F. This is nothing more than a call to the Lisp
3273 function redraw-frame. */
3280 XSETFRAME (frame
, f
);
3281 Fredraw_frame (frame
);
3285 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3286 "Clear and redisplay all visible frames.")
3289 Lisp_Object tail
, frame
;
3291 FOR_EACH_FRAME (tail
, frame
)
3292 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3293 Fredraw_frame (frame
);
3299 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3300 visible frames marked as garbaged. */
3303 redraw_garbaged_frames ()
3305 Lisp_Object tail
, frame
;
3307 FOR_EACH_FRAME (tail
, frame
)
3308 if (FRAME_VISIBLE_P (XFRAME (frame
))
3309 && FRAME_GARBAGED_P (XFRAME (frame
)))
3310 Fredraw_frame (frame
);
3315 /***********************************************************************
3317 ***********************************************************************/
3319 /* Try to update display and current glyph matrix directly.
3321 This function is called after a character G has been inserted into
3322 current_buffer. It tries to update the current glyph matrix and
3323 perform appropriate screen output to reflect the insertion. If it
3324 succeeds, the global flag redisplay_performed_directly_p will be
3325 set to 1, and thereby prevent the more costly general redisplay
3326 from running (see redisplay_internal).
3328 This function is not called for `hairy' character insertions.
3329 In particular, it is not called when after or before change
3330 functions exist, like they are used by font-lock. See keyboard.c
3331 for details where this function is called. */
3334 direct_output_for_insert (g
)
3337 register struct frame
*f
= SELECTED_FRAME ();
3338 struct window
*w
= XWINDOW (selected_window
);
3340 struct glyph_row
*glyph_row
;
3341 struct glyph
*glyphs
, *glyph
, *end
;
3343 /* Non-null means that Redisplay of W is based on window matrices. */
3344 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3345 /* Non-null means we are in overwrite mode. */
3346 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3348 struct text_pos pos
;
3349 int delta
, delta_bytes
;
3351 /* Not done directly. */
3352 redisplay_performed_directly_p
= 0;
3354 /* Quickly give up for some common cases. */
3355 if (cursor_in_echo_area
3356 /* Give up if fonts have changed. */
3358 /* Give up if face attributes have been changed. */
3359 || face_change_count
3360 /* Give up if cursor position not really known. */
3361 || !display_completed
3362 /* Give up if buffer appears in two places. */
3363 || buffer_shared
> 1
3364 /* Give up if currently displaying a message instead of the
3365 minibuffer contents. */
3366 || (EQ (selected_window
, minibuf_window
)
3367 && EQ (minibuf_window
, echo_area_window
))
3368 /* Give up for hscrolled mini-buffer because display of the prompt
3369 is handled specially there (see display_line). */
3370 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3371 /* Give up if overwriting in the middle of a line. */
3374 && FETCH_BYTE (PT
) != '\n')
3375 /* Give up for tabs and line ends. */
3379 /* Give up if unable to display the cursor in the window. */
3380 || w
->cursor
.vpos
< 0
3381 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3382 /* Can't do it in a continued line because continuation
3383 lines would change. */
3384 (glyph_row
->continued_p
3385 /* Can't use this method if the line overlaps others or is
3386 overlapped by others because these other lines would
3387 have to be redisplayed. */
3388 || glyph_row
->overlapping_p
3389 || glyph_row
->overlapped_p
))
3390 /* Can't do it for partial width windows on terminal frames
3391 because we can't clear to eol in such a window. */
3392 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3395 /* Set up a display iterator structure for W. Glyphs will be
3396 produced in scratch_glyph_row. Current position is W's cursor
3398 clear_glyph_row (&scratch_glyph_row
);
3399 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3400 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3401 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3404 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3405 if (glyph_row
->mouse_face_p
)
3408 /* Give up if highlighting trailing whitespace and we have trailing
3409 whitespace in glyph_row. We would have to remove the trailing
3410 whitespace face in that case. */
3411 if (!NILP (Vshow_trailing_whitespace
)
3412 && glyph_row
->used
[TEXT_AREA
])
3416 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3417 if (last
->type
== STRETCH_GLYPH
3418 || (last
->type
== CHAR_GLYPH
3419 && last
->u
.ch
== ' '))
3423 /* Give up if there are overlay strings at pos. This would fail
3424 if the overlay string has newlines in it. */
3425 if (STRINGP (it
.string
))
3428 it
.hpos
= w
->cursor
.hpos
;
3429 it
.vpos
= w
->cursor
.vpos
;
3430 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3431 it
.current_y
= w
->cursor
.y
;
3432 it
.end_charpos
= PT
;
3433 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3435 /* More than one display element may be returned for PT - 1 if
3436 (i) it's a control character which is translated into `\003' or
3437 `^C', or (ii) it has a display table entry, or (iii) it's a
3438 combination of both. */
3439 delta
= delta_bytes
= 0;
3440 while (get_next_display_element (&it
))
3442 PRODUCE_GLYPHS (&it
);
3444 /* Give up if glyph doesn't fit completely on the line. */
3445 if (it
.current_x
>= it
.last_visible_x
)
3448 /* Give up if new glyph has different ascent or descent than
3449 the original row, or if it is not a character glyph. */
3450 if (glyph_row
->ascent
!= it
.ascent
3451 || glyph_row
->height
!= it
.ascent
+ it
.descent
3452 || glyph_row
->phys_ascent
!= it
.phys_ascent
3453 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3454 || it
.what
!= IT_CHARACTER
)
3458 delta_bytes
+= it
.len
;
3459 set_iterator_to_next (&it
, 1);
3462 /* Give up if we hit the right edge of the window. We would have
3463 to insert truncation or continuation glyphs. */
3464 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3465 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3468 /* Give up if there is a \t following in the line. */
3470 it2
.end_charpos
= ZV
;
3471 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3472 while (get_next_display_element (&it2
)
3473 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3477 set_iterator_to_next (&it2
, 1);
3480 /* Number of new glyphs produced. */
3481 n
= it
.glyph_row
->used
[TEXT_AREA
];
3483 /* Start and end of glyphs in original row. */
3484 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3485 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3487 /* Make room for new glyphs, then insert them. */
3488 xassert (end
- glyphs
- n
>= 0);
3489 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3490 (end
- glyphs
- n
) * sizeof (*end
));
3491 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3492 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3493 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3495 /* Compute new line width. */
3496 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3497 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3498 glyph_row
->pixel_width
= glyph_row
->x
;
3501 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3505 /* Increment buffer positions for glyphs following the newly
3507 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3508 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3509 glyph
->charpos
+= delta
;
3511 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3513 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3514 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3517 /* Adjust positions in lines following the one we are in. */
3518 increment_matrix_positions (w
->current_matrix
,
3520 w
->current_matrix
->nrows
,
3521 delta
, delta_bytes
);
3523 glyph_row
->contains_overlapping_glyphs_p
3524 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3526 glyph_row
->displays_text_p
= 1;
3527 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3528 XFASTINT (w
->window_end_vpos
)));
3530 if (!NILP (Vshow_trailing_whitespace
))
3531 highlight_trailing_whitespace (it
.f
, glyph_row
);
3533 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3534 In the middle, we have to insert glyphs. Note that this is now
3535 implemented for X frames. The implementation uses updated_window
3537 updated_row
= glyph_row
;
3541 rif
->update_window_begin_hook (w
);
3543 if (glyphs
== end
- n
)
3544 rif
->write_glyphs (glyphs
, n
);
3546 rif
->insert_glyphs (glyphs
, n
);
3550 if (glyphs
== end
- n
)
3551 write_glyphs (glyphs
, n
);
3553 insert_glyphs (glyphs
, n
);
3556 w
->cursor
.hpos
+= n
;
3557 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3558 xassert (w
->cursor
.hpos
>= 0
3559 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3561 /* How to set the cursor differs depending on whether we are
3562 using a frame matrix or a window matrix. Note that when
3563 a frame matrix is used, cursor_to expects frame coordinates,
3564 and the X and Y parameters are not used. */
3565 if (window_redisplay_p
)
3566 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3567 w
->cursor
.y
, w
->cursor
.x
);
3571 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3572 + (INTEGERP (w
->left_margin_width
)
3573 ? XFASTINT (w
->left_margin_width
)
3575 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3580 rif
->update_window_end_hook (w
, 1, 0);
3585 TRACE ((stderr
, "direct output for insert\n"));
3587 UNCHANGED_MODIFIED
= MODIFF
;
3588 BEG_UNCHANGED
= GPT
- BEG
;
3589 XSETFASTINT (w
->last_point
, PT
);
3590 w
->last_cursor
= w
->cursor
;
3591 XSETFASTINT (w
->last_modified
, MODIFF
);
3592 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3594 redisplay_performed_directly_p
= 1;
3599 /* Perform a direct display update for moving PT by N positions
3600 left or right. N < 0 means a movement backwards. This function
3601 is currently only called for N == 1 or N == -1. */
3604 direct_output_forward_char (n
)
3607 struct frame
*f
= SELECTED_FRAME ();
3608 struct window
*w
= XWINDOW (selected_window
);
3609 struct glyph_row
*row
;
3611 /* Give up if point moved out of or into a composition. */
3612 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3613 current_buffer
, PT
))
3616 /* Give up if face attributes have been changed. */
3617 if (face_change_count
)
3620 /* Give up if current matrix is not up to date or we are
3621 displaying a message. */
3622 if (!display_completed
|| cursor_in_echo_area
)
3625 /* Give up if the buffer's direction is reversed. */
3626 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3629 /* Can't use direct output if highlighting a region. */
3630 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3633 /* Can't use direct output if highlighting trailing whitespace. */
3634 if (!NILP (Vshow_trailing_whitespace
))
3637 /* Give up if we are showing a message or just cleared the message
3638 because we might need to resize the echo area window. */
3639 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3642 /* Give up if currently displaying a message instead of the
3643 minibuffer contents. */
3644 if (XWINDOW (minibuf_window
) == w
3645 && EQ (minibuf_window
, echo_area_window
))
3648 /* Give up if we don't know where the cursor is. */
3649 if (w
->cursor
.vpos
< 0)
3652 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3654 /* Give up if PT is outside of the last known cursor row. */
3655 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3656 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3659 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3661 w
->last_cursor
= w
->cursor
;
3662 XSETFASTINT (w
->last_point
, PT
);
3664 xassert (w
->cursor
.hpos
>= 0
3665 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3667 if (FRAME_WINDOW_P (f
))
3668 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3669 w
->cursor
.y
, w
->cursor
.x
);
3673 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3674 + (INTEGERP (w
->left_margin_width
)
3675 ? XFASTINT (w
->left_margin_width
)
3677 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3682 redisplay_performed_directly_p
= 1;
3688 /***********************************************************************
3690 ***********************************************************************/
3692 /* Update frame F based on the data in desired matrices.
3694 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3695 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3698 Value is non-zero if redisplay was stopped due to pending input. */
3701 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3704 int inhibit_hairy_id_p
;
3706 /* 1 means display has been paused because of pending input. */
3708 struct window
*root_window
= XWINDOW (f
->root_window
);
3710 if (FRAME_WINDOW_P (f
))
3712 /* We are working on window matrix basis. All windows whose
3713 flag must_be_updated_p is set have to be updated. */
3715 /* Record that we are not working on frame matrices. */
3716 set_frame_matrix_frame (NULL
);
3718 /* Update all windows in the window tree of F, maybe stopping
3719 when pending input is detected. */
3722 /* Update the menu bar on X frames that don't have toolkit
3724 if (WINDOWP (f
->menu_bar_window
))
3725 update_window (XWINDOW (f
->menu_bar_window
), 1);
3727 /* Update the tool-bar window, if present. */
3728 if (WINDOWP (f
->tool_bar_window
))
3731 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3733 /* Update tool-bar window. */
3734 if (w
->must_be_updated_p
)
3736 update_window (w
, 1);
3737 w
->must_be_updated_p
= 0;
3739 /* Swap tool-bar strings. We swap because we want to
3741 tem
= f
->current_tool_bar_string
;
3742 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3743 f
->desired_tool_bar_string
= tem
;
3748 /* Update windows. */
3749 paused_p
= update_window_tree (root_window
, force_p
);
3752 #if 0 /* This flush is a performance bottleneck under X,
3753 and it doesn't seem to be necessary anyway. */
3754 rif
->flush_display (f
);
3759 /* We are working on frame matrix basis. Set the frame on whose
3760 frame matrix we operate. */
3761 set_frame_matrix_frame (f
);
3763 /* Build F's desired matrix from window matrices. */
3764 build_frame_matrix (f
);
3766 /* Update the display */
3768 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3772 fflush (termscript
);
3775 /* Check window matrices for lost pointers. */
3777 check_window_matrix_pointers (root_window
);
3778 add_frame_display_history (f
, paused_p
);
3782 /* Reset flags indicating that a window should be updated. */
3783 set_window_update_flags (root_window
, 0);
3785 display_completed
= !paused_p
;
3791 /************************************************************************
3792 Window-based updates
3793 ************************************************************************/
3795 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3796 don't stop updating when input is pending. */
3799 update_window_tree (w
, force_p
)
3805 while (w
&& !paused_p
)
3807 if (!NILP (w
->hchild
))
3808 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3809 else if (!NILP (w
->vchild
))
3810 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3811 else if (w
->must_be_updated_p
)
3812 paused_p
|= update_window (w
, force_p
);
3814 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3821 /* Update window W if its flag must_be_updated_p is non-zero. If
3822 FORCE_P is non-zero, don't stop updating if input is pending. */
3825 update_single_window (w
, force_p
)
3829 if (w
->must_be_updated_p
)
3831 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3833 /* Record that this is not a frame-based redisplay. */
3834 set_frame_matrix_frame (NULL
);
3838 update_window (w
, force_p
);
3841 /* Reset flag in W. */
3842 w
->must_be_updated_p
= 0;
3847 /* Redraw lines from the current matrix of window W that are
3848 overlapped by other rows. YB is bottom-most y-position in W. */
3851 redraw_overlapped_rows (w
, yb
)
3857 /* If rows overlapping others have been changed, the rows being
3858 overlapped have to be redrawn. This won't draw lines that have
3859 already been drawn in update_window_line because overlapped_p in
3860 desired rows is 0, so after row assignment overlapped_p in
3861 current rows is 0. */
3862 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3864 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3866 if (!row
->enabled_p
)
3868 else if (row
->mode_line_p
)
3871 if (row
->overlapped_p
)
3873 enum glyph_row_area area
;
3875 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3878 updated_area
= area
;
3879 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3880 if (row
->used
[area
])
3881 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3882 rif
->clear_end_of_line (-1);
3885 row
->overlapped_p
= 0;
3888 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3894 /* Redraw lines from the current matrix of window W that overlap
3895 others. YB is bottom-most y-position in W. */
3898 redraw_overlapping_rows (w
, yb
)
3903 struct glyph_row
*row
;
3905 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3907 row
= w
->current_matrix
->rows
+ i
;
3909 if (!row
->enabled_p
)
3911 else if (row
->mode_line_p
)
3914 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3916 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3918 if (row
->used
[LEFT_MARGIN_AREA
])
3919 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3921 if (row
->used
[TEXT_AREA
])
3922 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3924 if (row
->used
[RIGHT_MARGIN_AREA
])
3925 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3927 /* Record in neighbor rows that ROW overwrites part of their
3929 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3930 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3931 if ((row
->phys_height
- row
->phys_ascent
3932 > row
->height
- row
->ascent
)
3934 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3943 /* Update display of window W. FORCE_P non-zero means that we should
3944 not stop when detecting pending input. */
3947 update_window (w
, force_p
)
3951 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3953 int preempt_count
= baud_rate
/ 2400 + 1;
3954 extern int input_pending
;
3955 extern Lisp_Object do_mouse_tracking
;
3957 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3958 extern struct frame
*updating_frame
;
3961 /* Check that W's frame doesn't have glyph matrices. */
3962 xassert (FRAME_WINDOW_P (f
));
3963 xassert (updating_frame
!= NULL
);
3965 /* Check pending input the first time so that we can quickly return. */
3966 if (redisplay_dont_pause
)
3969 detect_input_pending ();
3971 /* If forced to complete the update, or if no input is pending, do
3973 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3975 struct glyph_row
*row
, *end
;
3976 struct glyph_row
*mode_line_row
;
3977 struct glyph_row
*header_line_row
= NULL
;
3978 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3980 rif
->update_window_begin_hook (w
);
3981 yb
= window_text_bottom_y (w
);
3983 /* If window has a top line, update it before everything else.
3984 Adjust y-positions of other rows by the top line height. */
3985 row
= desired_matrix
->rows
;
3986 end
= row
+ desired_matrix
->nrows
- 1;
3987 if (row
->mode_line_p
)
3988 header_line_row
= row
++;
3990 /* Update the mode line, if necessary. */
3991 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3992 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3994 mode_line_row
->y
= yb
;
3995 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3997 &mouse_face_overwritten_p
);
4001 /* Find first enabled row. Optimizations in redisplay_internal
4002 may lead to an update with only one row enabled. There may
4003 be also completely empty matrices. */
4004 while (row
< end
&& !row
->enabled_p
)
4007 /* Try reusing part of the display by copying. */
4008 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4010 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4013 /* All rows were found to be equal. */
4022 /* Update the top mode line after scrolling because a new top
4023 line would otherwise overwrite lines at the top of the window
4024 that can be scrolled. */
4025 if (header_line_row
&& header_line_row
->enabled_p
)
4027 header_line_row
->y
= 0;
4028 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4032 /* Update the rest of the lines. */
4033 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4036 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4039 /* We'll Have to play a little bit with when to
4040 detect_input_pending. If it's done too often,
4041 scrolling large windows with repeated scroll-up
4042 commands will too quickly pause redisplay. */
4043 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4044 detect_input_pending ();
4046 changed_p
|= update_window_line (w
, vpos
,
4047 &mouse_face_overwritten_p
);
4049 /* Mark all rows below the last visible one in the current
4050 matrix as invalid. This is necessary because of
4051 variable line heights. Consider the case of three
4052 successive redisplays, where the first displays 5
4053 lines, the second 3 lines, and the third 5 lines again.
4054 If the second redisplay wouldn't mark rows in the
4055 current matrix invalid, the third redisplay might be
4056 tempted to optimize redisplay based on lines displayed
4057 in the first redisplay. */
4058 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4059 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4060 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4063 /* Was display preempted? */
4064 paused_p
= row
< end
;
4068 /* Fix the appearance of overlapping(overlapped rows. */
4069 if (!paused_p
&& !w
->pseudo_window_p
)
4071 if (changed_p
&& rif
->fix_overlapping_area
)
4073 redraw_overlapped_rows (w
, yb
);
4074 redraw_overlapping_rows (w
, yb
);
4077 /* Make cursor visible at cursor position of W. */
4078 set_window_cursor_after_update (w
);
4080 #if 0 /* Check that current matrix invariants are satisfied. This is
4081 for debugging only. See the comment of check_matrix_invariants. */
4082 IF_DEBUG (check_matrix_invariants (w
));
4087 /* Remember the redisplay method used to display the matrix. */
4088 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4091 /* End of update of window W. */
4092 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
4098 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4101 clear_glyph_matrix (desired_matrix
);
4107 /* Update the display of area AREA in window W, row number VPOS.
4108 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4111 update_marginal_area (w
, area
, vpos
)
4115 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4117 /* Let functions in xterm.c know what area subsequent X positions
4118 will be relative to. */
4119 updated_area
= area
;
4121 /* Set cursor to start of glyphs, write them, and clear to the end
4122 of the area. I don't think that something more sophisticated is
4123 necessary here, since marginal areas will not be the default. */
4124 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4125 if (desired_row
->used
[area
])
4126 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4127 rif
->clear_end_of_line (-1);
4131 /* Update the display of the text area of row VPOS in window W.
4132 Value is non-zero if display has changed. */
4135 update_text_area (w
, vpos
)
4139 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4140 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4143 /* Let functions in xterm.c know what area subsequent X positions
4144 will be relative to. */
4145 updated_area
= TEXT_AREA
;
4147 /* If rows are at different X or Y, or rows have different height,
4148 or the current row is marked invalid, write the entire line. */
4149 if (!current_row
->enabled_p
4150 || desired_row
->y
!= current_row
->y
4151 || desired_row
->ascent
!= current_row
->ascent
4152 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4153 || desired_row
->phys_height
!= current_row
->phys_height
4154 || desired_row
->visible_height
!= current_row
->visible_height
4155 || current_row
->overlapped_p
4156 || current_row
->mouse_face_p
4157 || current_row
->x
!= desired_row
->x
)
4159 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4161 if (desired_row
->used
[TEXT_AREA
])
4162 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4163 desired_row
->used
[TEXT_AREA
]);
4165 /* Clear to end of window. */
4166 rif
->clear_end_of_line (-1);
4172 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4173 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4174 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4176 /* If the desired row extends its face to the text area end,
4177 make sure we write at least one glyph, so that the face
4178 extension actually takes place. */
4179 int desired_stop_pos
= (desired_row
->used
[TEXT_AREA
]
4180 - (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4183 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4191 /* Skip over glyphs that both rows have in common. These
4192 don't have to be written. We can't skip if the last
4193 current glyph overlaps the glyph to its right. For
4194 example, consider a current row of `if ' with the `f' in
4195 Courier bold so that it overlaps the ` ' to its right.
4196 If the desired row is ` ', we would skip over the space
4197 after the `if' and there would remain a pixel from the
4198 `f' on the screen. */
4199 if (overlapping_glyphs_p
&& i
> 0)
4201 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4204 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4206 can_skip_p
= right
== 0;
4212 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4214 x
+= desired_glyph
->pixel_width
;
4215 ++desired_glyph
, ++current_glyph
, ++i
;
4218 /* Consider the case that the current row contains "xxx
4219 ppp ggg" in italic Courier font, and the desired row
4220 is "xxx ggg". The character `p' has lbearing, `g'
4221 has not. The loop above will stop in front of the
4222 first `p' in the current row. If we would start
4223 writing glyphs there, we wouldn't erase the lbearing
4224 of the `p'. The rest of the lbearing problem is then
4225 taken care of by x_draw_glyphs. */
4226 if (overlapping_glyphs_p
4228 && i
< current_row
->used
[TEXT_AREA
]
4229 && (current_row
->used
[TEXT_AREA
]
4230 != desired_row
->used
[TEXT_AREA
]))
4234 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4236 while (left
> 0 && i
> 0)
4238 --i
, --desired_glyph
, --current_glyph
;
4239 x
-= desired_glyph
->pixel_width
;
4240 left
-= desired_glyph
->pixel_width
;
4245 /* Try to avoid writing the entire rest of the desired row
4246 by looking for a resync point. This mainly prevents
4247 mode line flickering in the case the mode line is in
4248 fixed-pitch font, which it usually will be. */
4249 if (i
< desired_row
->used
[TEXT_AREA
])
4251 int start_x
= x
, start_hpos
= i
;
4252 struct glyph
*start
= desired_glyph
;
4254 int skip_first_p
= !can_skip_p
;
4256 /* Find the next glyph that's equal again. */
4259 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4262 x
+= desired_glyph
->pixel_width
;
4263 current_x
+= current_glyph
->pixel_width
;
4264 ++desired_glyph
, ++current_glyph
, ++i
;
4268 if (i
== start_hpos
|| x
!= current_x
)
4272 desired_glyph
= start
;
4276 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4277 rif
->write_glyphs (start
, i
- start_hpos
);
4282 /* Write the rest. */
4283 if (i
< desired_row
->used
[TEXT_AREA
])
4285 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4286 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4290 /* Maybe clear to end of line. */
4291 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4293 /* If new row extends to the end of the text area, nothing
4294 has to be cleared, if and only if we did a write_glyphs
4295 above. This is made sure by setting desired_stop_pos
4296 appropriately above. */
4297 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4299 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4301 /* If old row extends to the end of the text area, clear. */
4302 if (i
>= desired_row
->used
[TEXT_AREA
])
4303 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4304 desired_row
->x
+ desired_row
->pixel_width
);
4305 rif
->clear_end_of_line (-1);
4308 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4310 /* Otherwise clear to the end of the old row. Everything
4311 after that position should be clear already. */
4314 if (i
>= desired_row
->used
[TEXT_AREA
])
4315 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4316 desired_row
->x
+ desired_row
->pixel_width
);
4318 /* If cursor is displayed at the end of the line, make sure
4319 it's cleared. Nowadays we don't have a phys_cursor_glyph
4320 with which to erase the cursor (because this method
4321 doesn't work with lbearing/rbearing), so we must do it
4323 if (vpos
== w
->phys_cursor
.vpos
4324 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4326 w
->phys_cursor_on_p
= 0;
4330 x
= current_row
->x
+ current_row
->pixel_width
;
4331 rif
->clear_end_of_line (x
);
4340 /* Update row VPOS in window W. Value is non-zero if display has been
4344 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4346 int vpos
, *mouse_face_overwritten_p
;
4348 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4349 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4352 /* Set the row being updated. This is important to let xterm.c
4353 know what line height values are in effect. */
4354 updated_row
= desired_row
;
4356 /* A row can be completely invisible in case a desired matrix was
4357 built with a vscroll and then make_cursor_line_fully_visible shifts
4358 the matrix. Make sure to make such rows current anyway, since
4359 we need the correct y-position, for example, in the current matrix. */
4360 if (desired_row
->mode_line_p
4361 || desired_row
->visible_height
> 0)
4363 xassert (desired_row
->enabled_p
);
4365 /* Update display of the left margin area, if there is one. */
4366 if (!desired_row
->full_width_p
4367 && !NILP (w
->left_margin_width
))
4370 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4373 /* Update the display of the text area. */
4374 if (update_text_area (w
, vpos
))
4377 if (current_row
->mouse_face_p
)
4378 *mouse_face_overwritten_p
= 1;
4381 /* Update display of the right margin area, if there is one. */
4382 if (!desired_row
->full_width_p
4383 && !NILP (w
->right_margin_width
))
4386 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4389 /* Draw truncation marks etc. */
4390 if (!current_row
->enabled_p
4391 || desired_row
->y
!= current_row
->y
4392 || desired_row
->visible_height
!= current_row
->visible_height
4393 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4394 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4395 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4396 || desired_row
->continued_p
!= current_row
->continued_p
4397 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4398 || (desired_row
->indicate_empty_line_p
4399 != current_row
->indicate_empty_line_p
)
4400 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4401 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4402 rif
->after_update_window_line_hook (desired_row
);
4405 /* Update current_row from desired_row. */
4406 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4412 /* Set the cursor after an update of window W. This function may only
4413 be called from update_window. */
4416 set_window_cursor_after_update (w
)
4419 struct frame
*f
= XFRAME (w
->frame
);
4420 int cx
, cy
, vpos
, hpos
;
4422 /* Not intended for frame matrix updates. */
4423 xassert (FRAME_WINDOW_P (f
));
4425 if (cursor_in_echo_area
4426 && !NILP (echo_area_buffer
[0])
4427 /* If we are showing a message instead of the mini-buffer,
4428 show the cursor for the message instead. */
4429 && XWINDOW (minibuf_window
) == w
4430 && EQ (minibuf_window
, echo_area_window
)
4431 /* These cases apply only to the frame that contains
4432 the active mini-buffer window. */
4433 && FRAME_HAS_MINIBUF_P (f
)
4434 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4436 cx
= cy
= vpos
= hpos
= 0;
4438 if (cursor_in_echo_area
>= 0)
4440 /* If the mini-buffer is several lines high, find the last
4441 line that has any text on it. Note: either all lines
4442 are enabled or none. Otherwise we wouldn't be able to
4444 struct glyph_row
*row
, *last_row
;
4445 struct glyph
*glyph
;
4446 int yb
= window_text_bottom_y (w
);
4449 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4453 if (row
->used
[TEXT_AREA
]
4454 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4457 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4463 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4464 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4466 while (last
> start
&& last
->charpos
< 0)
4469 for (glyph
= start
; glyph
< last
; ++glyph
)
4471 cx
+= glyph
->pixel_width
;
4476 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4484 hpos
= w
->cursor
.hpos
;
4485 vpos
= w
->cursor
.vpos
;
4488 /* Window cursor can be out of sync for horizontally split windows. */
4489 hpos
= max (0, hpos
);
4490 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4491 vpos
= max (0, vpos
);
4492 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4493 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4497 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4498 tree rooted at W. */
4501 set_window_update_flags (w
, on_p
)
4507 if (!NILP (w
->hchild
))
4508 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4509 else if (!NILP (w
->vchild
))
4510 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4512 w
->must_be_updated_p
= on_p
;
4514 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4520 /***********************************************************************
4521 Window-Based Scrolling
4522 ***********************************************************************/
4524 /* Structure describing rows in scrolling_window. */
4528 /* Number of occurrences of this row in desired and current matrix. */
4529 int old_uses
, new_uses
;
4531 /* Vpos of row in new matrix. */
4532 int new_line_number
;
4534 /* Bucket index of this row_entry in the hash table row_table. */
4537 /* The row described by this entry. */
4538 struct glyph_row
*row
;
4540 /* Hash collision chain. */
4541 struct row_entry
*next
;
4544 /* A pool to allocate row_entry structures from, and the size of the
4545 pool. The pool is reallocated in scrolling_window when we find
4546 that we need a larger one. */
4548 static struct row_entry
*row_entry_pool
;
4549 static int row_entry_pool_size
;
4551 /* Index of next free entry in row_entry_pool. */
4553 static int row_entry_idx
;
4555 /* The hash table used during scrolling, and the table's size. This
4556 table is used to quickly identify equal rows in the desired and
4559 static struct row_entry
**row_table
;
4560 static int row_table_size
;
4562 /* Vectors of pointers to row_entry structures belonging to the
4563 current and desired matrix, and the size of the vectors. */
4565 static struct row_entry
**old_lines
, **new_lines
;
4566 static int old_lines_size
, new_lines_size
;
4568 /* A pool to allocate run structures from, and its size. */
4570 static struct run
*run_pool
;
4571 static int runs_size
;
4573 /* A vector of runs of lines found during scrolling. */
4575 static struct run
**runs
;
4577 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4578 struct glyph_row
*));
4581 /* Add glyph row ROW to the scrolling hash table during the scrolling
4584 static INLINE
struct row_entry
*
4585 add_row_entry (w
, row
)
4587 struct glyph_row
*row
;
4589 struct row_entry
*entry
;
4590 int i
= row
->hash
% row_table_size
;
4592 entry
= row_table
[i
];
4593 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4594 entry
= entry
->next
;
4598 entry
= row_entry_pool
+ row_entry_idx
++;
4600 entry
->old_uses
= entry
->new_uses
= 0;
4601 entry
->new_line_number
= 0;
4603 entry
->next
= row_table
[i
];
4604 row_table
[i
] = entry
;
4611 /* Try to reuse part of the current display of W by scrolling lines.
4612 HEADER_LINE_P non-zero means W has a top mode line.
4614 The algorithm is taken from Communications of the ACM, Apr78 "A
4615 Technique for Isolating Differences Between Files." It should take
4618 A short outline of the steps of the algorithm
4620 1. Skip lines equal at the start and end of both matrices.
4622 2. Enter rows in the current and desired matrix into a symbol
4623 table, counting how often they appear in both matrices.
4625 3. Rows that appear exactly once in both matrices serve as anchors,
4626 i.e. we assume that such lines are likely to have been moved.
4628 4. Starting from anchor lines, extend regions to be scrolled both
4629 forward and backward.
4633 -1 if all rows were found to be equal.
4634 0 to indicate that we did not scroll the display, or
4635 1 if we did scroll. */
4638 scrolling_window (w
, header_line_p
)
4642 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4643 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4644 int yb
= window_text_bottom_y (w
);
4645 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4646 int nruns
, nbytes
, n
, run_idx
;
4647 struct row_entry
*entry
;
4649 /* Skip over rows equal at the start. */
4650 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4652 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4653 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4658 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4659 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4660 && row_equal_p (w
, c
, d
, 1))
4669 /* Give up if some rows in the desired matrix are not enabled. */
4670 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4673 first_old
= first_new
= i
;
4675 /* Set last_new to the index + 1 of the last enabled row in the
4678 while (i
< desired_matrix
->nrows
- 1
4679 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4680 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4683 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4688 /* Set last_old to the index + 1 of the last enabled row in the
4689 current matrix. We don't look at the enabled flag here because
4690 we plan to reuse part of the display even if other parts are
4693 while (i
< current_matrix
->nrows
- 1
4694 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
)) <= yb
)
4698 /* Skip over rows equal at the bottom. */
4701 while (i
- 1 > first_new
4702 && j
- 1 > first_old
4703 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4704 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4705 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4707 MATRIX_ROW (desired_matrix
, i
- 1),
4708 MATRIX_ROW (current_matrix
, j
- 1), 1))
4713 /* Nothing to do if all rows are equal. */
4714 if (last_new
== first_new
)
4717 /* Reallocate vectors, tables etc. if necessary. */
4719 if (current_matrix
->nrows
> old_lines_size
)
4721 old_lines_size
= current_matrix
->nrows
;
4722 nbytes
= old_lines_size
* sizeof *old_lines
;
4723 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4726 if (desired_matrix
->nrows
> new_lines_size
)
4728 new_lines_size
= desired_matrix
->nrows
;
4729 nbytes
= new_lines_size
* sizeof *new_lines
;
4730 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4733 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4734 if (3 * n
> row_table_size
)
4736 row_table_size
= next_almost_prime (3 * n
);
4737 nbytes
= row_table_size
* sizeof *row_table
;
4738 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4739 bzero (row_table
, nbytes
);
4742 if (n
> row_entry_pool_size
)
4744 row_entry_pool_size
= n
;
4745 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4746 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4749 if (desired_matrix
->nrows
> runs_size
)
4751 runs_size
= desired_matrix
->nrows
;
4752 nbytes
= runs_size
* sizeof *runs
;
4753 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4754 nbytes
= runs_size
* sizeof *run_pool
;
4755 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4758 nruns
= run_idx
= 0;
4761 /* Add rows from the current and desired matrix to the hash table
4762 row_hash_table to be able to find equal ones quickly. */
4764 for (i
= first_old
; i
< last_old
; ++i
)
4766 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4768 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4769 old_lines
[i
] = entry
;
4773 old_lines
[i
] = NULL
;
4776 for (i
= first_new
; i
< last_new
; ++i
)
4778 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4779 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4781 entry
->new_line_number
= i
;
4782 new_lines
[i
] = entry
;
4785 /* Identify moves based on lines that are unique and equal
4786 in both matrices. */
4787 for (i
= first_old
; i
< last_old
;)
4789 && old_lines
[i
]->old_uses
== 1
4790 && old_lines
[i
]->new_uses
== 1)
4793 int new_line
= old_lines
[i
]->new_line_number
;
4794 struct run
*run
= run_pool
+ run_idx
++;
4797 run
->current_vpos
= i
;
4798 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4799 run
->desired_vpos
= new_line
;
4800 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4802 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4804 /* Extend backward. */
4807 while (j
> first_old
4809 && old_lines
[j
] == new_lines
[k
])
4811 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4812 --run
->current_vpos
;
4813 --run
->desired_vpos
;
4816 run
->desired_y
-= h
;
4817 run
->current_y
-= h
;
4821 /* Extend forward. */
4826 && old_lines
[j
] == new_lines
[k
])
4828 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4834 /* Insert run into list of all runs. Order runs by copied
4835 pixel lines. Note that we record runs that don't have to
4836 be copied because they are already in place. This is done
4837 because we can avoid calling update_window_line in this
4839 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4841 for (k
= nruns
; k
> j
; --k
)
4842 runs
[k
] = runs
[k
- 1];
4851 /* Do the moves. Do it in a way that we don't overwrite something
4852 we want to copy later on. This is not solvable in general
4853 because there is only one display and we don't have a way to
4854 exchange areas on this display. Example:
4856 +-----------+ +-----------+
4858 +-----------+ --> +-----------+
4860 +-----------+ +-----------+
4862 Instead, prefer bigger moves, and invalidate moves that would
4863 copy from where we copied to. */
4865 for (i
= 0; i
< nruns
; ++i
)
4866 if (runs
[i
]->nrows
> 0)
4868 struct run
*r
= runs
[i
];
4870 /* Copy on the display. */
4871 if (r
->current_y
!= r
->desired_y
)
4873 rif
->scroll_run_hook (w
, r
);
4875 /* Invalidate runs that copy from where we copied to. */
4876 for (j
= i
+ 1; j
< nruns
; ++j
)
4878 struct run
*p
= runs
[j
];
4880 if ((p
->current_y
>= r
->desired_y
4881 && p
->current_y
< r
->desired_y
+ r
->height
)
4882 || (p
->current_y
+ p
->height
>= r
->desired_y
4883 && (p
->current_y
+ p
->height
4884 < r
->desired_y
+ r
->height
)))
4889 /* Assign matrix rows. */
4890 for (j
= 0; j
< r
->nrows
; ++j
)
4892 struct glyph_row
*from
, *to
;
4893 int to_overlapped_p
;
4895 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4896 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4897 to_overlapped_p
= to
->overlapped_p
;
4898 assign_row (to
, from
);
4899 to
->enabled_p
= 1, from
->enabled_p
= 0;
4900 to
->overlapped_p
= to_overlapped_p
;
4904 /* Clear the hash table, for the next time. */
4905 for (i
= 0; i
< row_entry_idx
; ++i
)
4906 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4908 /* Value is non-zero to indicate that we scrolled the display. */
4914 /************************************************************************
4916 ************************************************************************/
4918 /* Update the desired frame matrix of frame F.
4920 FORCE_P non-zero means that the update should not be stopped by
4921 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4922 should not be tried.
4924 Value is non-zero if update was stopped due to pending input. */
4927 update_frame_1 (f
, force_p
, inhibit_id_p
)
4932 /* Frame matrices to work on. */
4933 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4934 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4937 int preempt_count
= baud_rate
/ 2400 + 1;
4938 extern int input_pending
;
4940 xassert (current_matrix
&& desired_matrix
);
4942 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4943 calculate_costs (f
);
4945 if (preempt_count
<= 0)
4948 if (redisplay_dont_pause
)
4950 else if (!force_p
&& detect_input_pending ())
4956 /* If we cannot insert/delete lines, it's no use trying it. */
4957 if (!line_ins_del_ok
)
4960 /* See if any of the desired lines are enabled; don't compute for
4961 i/d line if just want cursor motion. */
4962 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4963 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4966 /* Try doing i/d line, if not yet inhibited. */
4967 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4968 force_p
|= scrolling (f
);
4970 /* Update the individual lines as needed. Do bottom line first. */
4971 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4972 update_frame_line (f
, desired_matrix
->nrows
- 1);
4974 /* Now update the rest of the lines. */
4975 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4977 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4979 if (FRAME_TERMCAP_P (f
))
4981 /* Flush out every so many lines.
4982 Also flush out if likely to have more than 1k buffered
4983 otherwise. I'm told that some telnet connections get
4984 really screwed by more than 1k output at once. */
4985 int outq
= PENDING_OUTPUT_COUNT (stdout
);
4987 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4990 if (preempt_count
== 1)
4992 #ifdef EMACS_OUTQSIZE
4993 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4994 /* Probably not a tty. Ignore the error and reset
4995 * the outq count. */
4996 outq
= PENDING_OUTPUT_COUNT (stdout
);
4999 if (baud_rate
<= outq
&& baud_rate
> 0)
5000 sleep (outq
/ baud_rate
);
5005 if ((i
- 1) % preempt_count
== 0)
5006 detect_input_pending ();
5008 update_frame_line (f
, i
);
5012 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
5014 /* Now just clean up termcap drivers and set cursor, etc. */
5017 if ((cursor_in_echo_area
5018 /* If we are showing a message instead of the mini-buffer,
5019 show the cursor for the message instead of for the
5020 (now hidden) mini-buffer contents. */
5021 || (EQ (minibuf_window
, selected_window
)
5022 && EQ (minibuf_window
, echo_area_window
)
5023 && !NILP (echo_area_buffer
[0])))
5024 /* These cases apply only to the frame that contains
5025 the active mini-buffer window. */
5026 && FRAME_HAS_MINIBUF_P (f
)
5027 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5029 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
5032 if (cursor_in_echo_area
< 0)
5034 /* Negative value of cursor_in_echo_area means put
5035 cursor at beginning of line. */
5041 /* Positive value of cursor_in_echo_area means put
5042 cursor at the end of the prompt. If the mini-buffer
5043 is several lines high, find the last line that has
5045 row
= FRAME_HEIGHT (f
);
5051 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5053 /* Frame rows are filled up with spaces that
5054 must be ignored here. */
5055 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5057 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5058 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5061 && (last
- 1)->charpos
< 0)
5067 while (row
> top
&& col
== 0);
5069 /* Make sure COL is not out of range. */
5070 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5072 /* If we have another row, advance cursor into it. */
5073 if (row
< FRAME_HEIGHT (f
) - 1)
5075 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
5078 /* Otherwise move it back in range. */
5080 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5084 cursor_to (row
, col
);
5088 /* We have only one cursor on terminal frames. Use it to
5089 display the cursor of the selected window. */
5090 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5091 if (w
->cursor
.vpos
>= 0
5092 /* The cursor vpos may be temporarily out of bounds
5093 in the following situation: There is one window,
5094 with the cursor in the lower half of it. The window
5095 is split, and a message causes a redisplay before
5096 a new cursor position has been computed. */
5097 && w
->cursor
.vpos
< XFASTINT (w
->height
))
5099 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5100 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5102 if (INTEGERP (w
->left_margin_width
))
5103 x
+= XFASTINT (w
->left_margin_width
);
5105 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
5113 clear_desired_matrices (f
);
5118 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5122 struct frame
*frame
;
5124 int unchanged_at_top
, unchanged_at_bottom
;
5127 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5128 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5129 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5130 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
5132 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
5133 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5134 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5136 if (!current_matrix
)
5139 /* Compute hash codes of all the lines. Also calculate number of
5140 changed lines, number of unchanged lines at the beginning, and
5141 number of unchanged lines at the end. */
5143 unchanged_at_top
= 0;
5144 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
5145 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
5147 /* Give up on this scrolling if some old lines are not enabled. */
5148 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5150 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5151 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5153 /* This line cannot be redrawn, so don't let scrolling mess it. */
5154 new_hash
[i
] = old_hash
[i
];
5155 #define INFINITY 1000000 /* Taken from scroll.c */
5156 draw_cost
[i
] = INFINITY
;
5160 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5161 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5164 if (old_hash
[i
] != new_hash
[i
])
5167 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
5169 else if (i
== unchanged_at_top
)
5171 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5174 /* If changed lines are few, don't allow preemption, don't scroll. */
5175 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5176 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
5179 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
5180 - unchanged_at_bottom
);
5182 if (scroll_region_ok
)
5183 free_at_end_vpos
-= unchanged_at_bottom
;
5184 else if (memory_below_frame
)
5185 free_at_end_vpos
= -1;
5187 /* If large window, fast terminal and few lines in common between
5188 current frame and desired frame, don't bother with i/d calc. */
5189 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5191 10 * scrolling_max_lines_saved (unchanged_at_top
,
5192 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5193 old_hash
, new_hash
, draw_cost
)))
5196 if (window_size
< 2)
5199 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5200 draw_cost
+ unchanged_at_top
- 1,
5201 old_draw_cost
+ unchanged_at_top
- 1,
5202 old_hash
+ unchanged_at_top
- 1,
5203 new_hash
+ unchanged_at_top
- 1,
5204 free_at_end_vpos
- unchanged_at_top
);
5210 /* Count the number of blanks at the start of the vector of glyphs R
5211 which is LEN glyphs long. */
5214 count_blanks (r
, len
)
5220 for (i
= 0; i
< len
; ++i
)
5221 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5228 /* Count the number of glyphs in common at the start of the glyph
5229 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5230 of STR2. Value is the number of equal glyphs equal at the start. */
5233 count_match (str1
, end1
, str2
, end2
)
5234 struct glyph
*str1
, *end1
, *str2
, *end2
;
5236 struct glyph
*p1
= str1
;
5237 struct glyph
*p2
= str2
;
5241 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5248 /* Char insertion/deletion cost vector, from term.c */
5250 extern int *char_ins_del_vector
;
5251 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5254 /* Perform a frame-based update on line VPOS in frame FRAME. */
5257 update_frame_line (frame
, vpos
)
5258 register struct frame
*frame
;
5261 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5263 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5264 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5265 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5266 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5267 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5268 int must_write_whole_line_p
;
5269 int write_spaces_p
= must_write_spaces
;
5270 int colored_spaces_p
= (FACE_FROM_ID (frame
, DEFAULT_FACE_ID
)->background
5271 != FACE_TTY_DEFAULT_BG_COLOR
);
5273 if (colored_spaces_p
)
5276 if (desired_row
->inverse_p
5277 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5279 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5280 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5281 current_row
->enabled_p
= 0;
5284 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5286 /* Current row not enabled means it has unknown contents. We must
5287 write the whole desired line in that case. */
5288 must_write_whole_line_p
= !current_row
->enabled_p
;
5289 if (must_write_whole_line_p
)
5296 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5297 olen
= current_row
->used
[TEXT_AREA
];
5299 if (!current_row
->inverse_p
)
5301 /* Ignore trailing spaces, if we can. */
5302 if (!write_spaces_p
)
5303 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5308 /* For an inverse-video line, make sure it's filled with
5309 spaces all the way to the frame edge so that the reverse
5310 video extends all the way across. */
5311 while (olen
< FRAME_WIDTH (frame
) - 1)
5312 obody
[olen
++] = space_glyph
;
5316 current_row
->enabled_p
= 1;
5317 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5318 current_row
->inverse_p
= desired_row
->inverse_p
;
5320 /* If desired line is empty, just clear the line. */
5321 if (!desired_row
->enabled_p
)
5327 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5328 nlen
= desired_row
->used
[TEXT_AREA
];
5329 nend
= nbody
+ nlen
;
5331 /* If display line has unknown contents, write the whole line. */
5332 if (must_write_whole_line_p
)
5334 /* Ignore spaces at the end, if we can. */
5335 if (!write_spaces_p
)
5336 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5339 /* Write the contents of the desired line. */
5342 cursor_to (vpos
, 0);
5343 write_glyphs (nbody
, nlen
);
5346 /* Don't call clear_end_of_line if we already wrote the whole
5347 line. The cursor will not be at the right margin in that
5348 case but in the line below. */
5349 if (nlen
< FRAME_WINDOW_WIDTH (frame
))
5351 cursor_to (vpos
, nlen
);
5352 clear_end_of_line (FRAME_WINDOW_WIDTH (frame
));
5355 /* Make sure we are in the right row, otherwise cursor movement
5356 with cmgoto might use `ch' in the wrong row. */
5357 cursor_to (vpos
, 0);
5359 make_current (desired_matrix
, current_matrix
, vpos
);
5363 /* Pretend trailing spaces are not there at all,
5364 unless for one reason or another we must write all spaces. */
5365 if (!desired_row
->inverse_p
)
5367 if (!write_spaces_p
)
5368 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5373 /* For an inverse-video line, give it extra trailing spaces all
5374 the way to the frame edge so that the reverse video extends
5375 all the way across. */
5376 while (nlen
< FRAME_WIDTH (frame
) - 1)
5377 nbody
[nlen
++] = space_glyph
;
5380 /* If there's no i/d char, quickly do the best we can without it. */
5381 if (!char_ins_del_ok
)
5385 /* Find the first glyph in desired row that doesn't agree with
5386 a glyph in the current row, and write the rest from there on. */
5387 for (i
= 0; i
< nlen
; i
++)
5389 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5391 /* Find the end of the run of different glyphs. */
5395 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5396 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5399 /* Output this run of non-matching chars. */
5400 cursor_to (vpos
, i
);
5401 write_glyphs (nbody
+ i
, j
- i
);
5404 /* Now find the next non-match. */
5408 /* Clear the rest of the line, or the non-clear part of it. */
5411 cursor_to (vpos
, nlen
);
5412 clear_end_of_line (olen
);
5415 /* Make current row = desired row. */
5416 make_current (desired_matrix
, current_matrix
, vpos
);
5420 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5421 characters in a row. */
5425 /* If current line is blank, skip over initial spaces, if
5426 possible, and write the rest. */
5427 if (write_spaces_p
|| desired_row
->inverse_p
)
5430 nsp
= count_blanks (nbody
, nlen
);
5434 cursor_to (vpos
, nsp
);
5435 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5438 /* Exchange contents between current_frame and new_frame. */
5439 make_current (desired_matrix
, current_matrix
, vpos
);
5443 /* Compute number of leading blanks in old and new contents. */
5444 osp
= count_blanks (obody
, olen
);
5445 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5447 : count_blanks (nbody
, nlen
));
5449 /* Compute number of matching chars starting with first non-blank. */
5450 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5451 nbody
+ nsp
, nbody
+ nlen
);
5453 /* Spaces in new match implicit space past the end of old. */
5454 /* A bug causing this to be a no-op was fixed in 18.29. */
5455 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5458 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5462 /* Avoid doing insert/delete char
5463 just cause number of leading spaces differs
5464 when the following text does not match. */
5465 if (begmatch
== 0 && osp
!= nsp
)
5466 osp
= nsp
= min (osp
, nsp
);
5468 /* Find matching characters at end of line */
5471 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5473 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5478 endmatch
= obody
+ olen
- op1
;
5480 /* tem gets the distance to insert or delete.
5481 endmatch is how many characters we save by doing so.
5484 tem
= (nlen
- nsp
) - (olen
- osp
);
5486 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
5489 /* nsp - osp is the distance to insert or delete.
5490 If that is nonzero, begmatch is known to be nonzero also.
5491 begmatch + endmatch is how much we save by doing the ins/del.
5495 && (!char_ins_del_ok
5496 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
5500 osp
= nsp
= min (osp
, nsp
);
5503 /* Now go through the line, inserting, writing and
5504 deleting as appropriate. */
5508 cursor_to (vpos
, nsp
);
5509 delete_glyphs (osp
- nsp
);
5513 /* If going to delete chars later in line
5514 and insert earlier in the line,
5515 must delete first to avoid losing data in the insert */
5516 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5518 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5519 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5520 olen
= nlen
- (nsp
- osp
);
5522 cursor_to (vpos
, osp
);
5523 insert_glyphs (0, nsp
- osp
);
5527 tem
= nsp
+ begmatch
+ endmatch
;
5528 if (nlen
!= tem
|| olen
!= tem
)
5530 cursor_to (vpos
, nsp
+ begmatch
);
5531 if (!endmatch
|| nlen
== olen
)
5533 /* If new text being written reaches right margin,
5534 there is no need to do clear-to-eol at the end.
5535 (and it would not be safe, since cursor is not
5536 going to be "at the margin" after the text is done) */
5537 if (nlen
== FRAME_WINDOW_WIDTH (frame
))
5539 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5541 else if (nlen
> olen
)
5543 /* Here, we used to have the following simple code:
5544 ----------------------------------------
5545 write_glyphs (nbody + nsp + begmatch, olen - tem);
5546 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5547 ----------------------------------------
5548 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5549 is a padding glyph. */
5550 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5553 /* Calculate columns we can actually overwrite. */
5554 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
])) out
--;
5555 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5556 /* If we left columns to be overwritten, we must delete them. */
5557 del
= olen
- tem
- out
;
5558 if (del
> 0) delete_glyphs (del
);
5559 /* At last, we insert columns not yet written out. */
5560 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5563 else if (olen
> nlen
)
5565 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5566 delete_glyphs (olen
- nlen
);
5572 /* If any unerased characters remain after the new line, erase them. */
5575 cursor_to (vpos
, nlen
);
5576 clear_end_of_line (olen
);
5579 /* Exchange contents between current_frame and new_frame. */
5580 make_current (desired_matrix
, current_matrix
, vpos
);
5585 /***********************************************************************
5586 X/Y Position -> Buffer Position
5587 ***********************************************************************/
5589 /* Return the character position of the character at window relative
5590 pixel position (*X, *Y). *X and *Y are adjusted to character
5594 buffer_posn_from_coords (w
, x
, y
)
5599 struct buffer
*old_current_buffer
= current_buffer
;
5600 struct text_pos startp
;
5601 int left_area_width
;
5603 current_buffer
= XBUFFER (w
->buffer
);
5604 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5605 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5606 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5607 start_display (&it
, w
, startp
);
5609 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5610 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5611 MOVE_TO_X
| MOVE_TO_Y
);
5613 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5615 current_buffer
= old_current_buffer
;
5616 return IT_CHARPOS (it
);
5620 /* Value is the string under window-relative coordinates X/Y in the
5621 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5622 means look at the mode line. *CHARPOS is set to the position in
5623 the string returned. */
5626 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5628 int x
, y
, mode_line_p
;
5631 struct glyph_row
*row
;
5632 struct glyph
*glyph
, *end
;
5633 struct frame
*f
= XFRAME (w
->frame
);
5635 Lisp_Object string
= Qnil
;
5638 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5640 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5642 if (row
->mode_line_p
&& row
->enabled_p
)
5644 /* The mode lines are displayed over scroll bars and bitmap
5645 areas, and X is window-relative. Correct X by the scroll bar
5646 and bitmap area width. */
5647 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5648 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5649 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5651 /* Find the glyph under X. If we find one with a string object,
5652 it's the one we were looking for. */
5653 glyph
= row
->glyphs
[TEXT_AREA
];
5654 end
= glyph
+ row
->used
[TEXT_AREA
];
5655 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5656 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5658 string
= glyph
->object
;
5659 *charpos
= glyph
->charpos
;
5668 /***********************************************************************
5669 Changing Frame Sizes
5670 ***********************************************************************/
5675 window_change_signal (signalnum
) /* If we don't have an argument, */
5676 int signalnum
; /* some compilers complain in signal calls. */
5682 int old_errno
= errno
;
5684 get_frame_size (&width
, &height
);
5686 /* The frame size change obviously applies to a termcap-controlled
5687 frame. Find such a frame in the list, and assume it's the only
5688 one (since the redisplay code always writes to stdout, not a
5689 FILE * specified in the frame structure). Record the new size,
5690 but don't reallocate the data structures now. Let that be done
5691 later outside of the signal handler. */
5694 Lisp_Object tail
, frame
;
5696 FOR_EACH_FRAME (tail
, frame
)
5698 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5700 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5706 signal (SIGWINCH
, window_change_signal
);
5709 #endif /* SIGWINCH */
5712 /* Do any change in frame size that was requested by a signal. SAFE
5713 non-zero means this function is called from a place where it is
5714 safe to change frame sizes while a redisplay is in progress. */
5717 do_pending_window_change (safe
)
5720 /* If window_change_signal should have run before, run it now. */
5721 if (redisplaying_p
&& !safe
)
5724 while (delayed_size_change
)
5726 Lisp_Object tail
, frame
;
5728 delayed_size_change
= 0;
5730 FOR_EACH_FRAME (tail
, frame
)
5732 struct frame
*f
= XFRAME (frame
);
5734 int height
= FRAME_NEW_HEIGHT (f
);
5735 int width
= FRAME_NEW_WIDTH (f
);
5737 if (height
!= 0 || width
!= 0)
5738 change_frame_size (f
, height
, width
, 0, 0, safe
);
5744 /* Change the frame height and/or width. Values may be given as zero to
5745 indicate no change is to take place.
5747 If DELAY is non-zero, then assume we're being called from a signal
5748 handler, and queue the change for later - perhaps the next
5749 redisplay. Since this tries to resize windows, we can't call it
5750 from a signal handler.
5752 SAFE non-zero means this function is called from a place where it's
5753 safe to change frame sizes while a redisplay is in progress. */
5756 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5757 register struct frame
*f
;
5758 int newheight
, newwidth
, pretend
, delay
, safe
;
5760 Lisp_Object tail
, frame
;
5762 if (! FRAME_WINDOW_P (f
))
5764 /* When using termcap, or on MS-DOS, all frames use
5765 the same screen, so a change in size affects all frames. */
5766 FOR_EACH_FRAME (tail
, frame
)
5767 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5768 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5769 pretend
, delay
, safe
);
5772 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5776 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5777 register struct frame
*f
;
5778 int newheight
, newwidth
, pretend
, delay
, safe
;
5780 int new_frame_window_width
;
5781 int count
= specpdl_ptr
- specpdl
;
5783 /* If we can't deal with the change now, queue it for later. */
5784 if (delay
|| (redisplaying_p
&& !safe
))
5786 FRAME_NEW_HEIGHT (f
) = newheight
;
5787 FRAME_NEW_WIDTH (f
) = newwidth
;
5788 delayed_size_change
= 1;
5792 /* This size-change overrides any pending one for this frame. */
5793 FRAME_NEW_HEIGHT (f
) = 0;
5794 FRAME_NEW_WIDTH (f
) = 0;
5796 /* If an argument is zero, set it to the current value. */
5798 newheight
= FRAME_HEIGHT (f
);
5800 newwidth
= FRAME_WIDTH (f
);
5802 /* Compute width of windows in F.
5803 This is the width of the frame without vertical scroll bars. */
5804 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5806 /* Round up to the smallest acceptable size. */
5807 check_frame_size (f
, &newheight
, &newwidth
);
5809 /* If we're not changing the frame size, quit now. */
5810 if (newheight
== FRAME_HEIGHT (f
)
5811 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5817 /* We only can set screen dimensions to certain values supported
5818 by our video hardware. Try to find the smallest size greater
5819 or equal to the requested dimensions. */
5820 dos_set_window_size (&newheight
, &newwidth
);
5823 if (newheight
!= FRAME_HEIGHT (f
))
5825 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5827 /* Frame has both root and mini-buffer. */
5828 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5829 FRAME_TOP_MARGIN (f
));
5830 set_window_height (FRAME_ROOT_WINDOW (f
),
5833 - FRAME_TOP_MARGIN (f
)),
5835 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5837 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5840 /* Frame has just one top-level window. */
5841 set_window_height (FRAME_ROOT_WINDOW (f
),
5842 newheight
- FRAME_TOP_MARGIN (f
), 0);
5844 if (FRAME_TERMCAP_P (f
) && !pretend
)
5845 FrameRows
= newheight
;
5848 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5850 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5851 if (FRAME_HAS_MINIBUF_P (f
))
5852 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5854 if (FRAME_TERMCAP_P (f
) && !pretend
)
5855 FrameCols
= newwidth
;
5857 if (WINDOWP (f
->tool_bar_window
))
5858 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5861 FRAME_HEIGHT (f
) = newheight
;
5862 SET_FRAME_WIDTH (f
, newwidth
);
5865 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5866 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5868 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5870 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5871 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5872 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5873 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5877 SET_FRAME_GARBAGED (f
);
5878 calculate_costs (f
);
5882 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5884 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5885 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5886 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5888 unbind_to (count
, Qnil
);
5893 /***********************************************************************
5894 Terminal Related Lisp Functions
5895 ***********************************************************************/
5897 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5898 1, 1, "FOpen termscript file: ",
5899 "Start writing all terminal output to FILE as well as the terminal.\n\
5900 FILE = nil means just close any termscript file currently open.")
5904 if (termscript
!= 0) fclose (termscript
);
5909 file
= Fexpand_file_name (file
, Qnil
);
5910 termscript
= fopen (XSTRING (file
)->data
, "w");
5911 if (termscript
== 0)
5912 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5918 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5919 Ssend_string_to_terminal
, 1, 1, 0,
5920 "Send STRING to the terminal without alteration.\n\
5921 Control characters in STRING will have terminal-dependent effects.")
5925 /* ??? Perhaps we should do something special for multibyte strings here. */
5926 CHECK_STRING (string
, 0);
5927 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
5931 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
5933 fflush (termscript
);
5939 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5940 "Beep, or flash the screen.\n\
5941 Also, unless an argument is given,\n\
5942 terminate any keyboard macro currently executing.")
5965 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5966 error ("Keyboard macro terminated by a command ringing the bell");
5974 /***********************************************************************
5976 ***********************************************************************/
5978 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5979 "Pause, without updating display, for SECONDS seconds.\n\
5980 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5981 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5982 additional wait period, in milliseconds; this may be useful if your\n\
5983 Emacs was built without floating point support.\n\
5984 \(Not all operating systems support waiting for a fraction of a second.)")
5985 (seconds
, milliseconds
)
5986 Lisp_Object seconds
, milliseconds
;
5990 if (NILP (milliseconds
))
5991 XSETINT (milliseconds
, 0);
5993 CHECK_NUMBER (milliseconds
, 1);
5994 usec
= XINT (milliseconds
) * 1000;
5997 double duration
= extract_float (seconds
);
5998 sec
= (int) duration
;
5999 usec
+= (duration
- sec
) * 1000000;
6002 #ifndef EMACS_HAS_USECS
6003 if (sec
== 0 && usec
!= 0)
6004 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6007 /* Assure that 0 <= usec < 1000000. */
6010 /* We can't rely on the rounding being correct if user is negative. */
6011 if (-1000000 < usec
)
6012 sec
--, usec
+= 1000000;
6014 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6017 sec
+= usec
/ 1000000, usec
%= 1000000;
6019 if (sec
< 0 || (sec
== 0 && usec
== 0))
6025 XSETFASTINT (zero
, 0);
6026 wait_reading_process_input (sec
, usec
, zero
, 0);
6029 /* We should always have wait_reading_process_input; we have a dummy
6030 implementation for systems which don't support subprocesses. */
6032 /* No wait_reading_process_input */
6039 /* The reason this is done this way
6040 (rather than defined (H_S) && defined (H_T))
6041 is because the VMS preprocessor doesn't grok `defined' */
6043 EMACS_GET_TIME (end_time
);
6044 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6045 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6049 EMACS_GET_TIME (timeout
);
6050 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6051 if (EMACS_TIME_NEG_P (timeout
)
6052 || !select (1, 0, 0, 0, &timeout
))
6055 #else /* not HAVE_SELECT */
6057 #endif /* HAVE_SELECT */
6058 #endif /* not VMS */
6061 #endif /* no subprocesses */
6067 /* This is just like wait_reading_process_input, except that
6068 it does the redisplay.
6070 It's also much like Fsit_for, except that it can be used for
6071 waiting for input as well. */
6074 sit_for (sec
, usec
, reading
, display
, initial_display
)
6075 int sec
, usec
, reading
, display
, initial_display
;
6077 Lisp_Object read_kbd
;
6079 swallow_events (display
);
6081 if (detect_input_pending_run_timers (display
))
6084 if (initial_display
)
6085 redisplay_preserve_echo_area ();
6087 if (sec
== 0 && usec
== 0)
6094 XSETINT (read_kbd
, reading
? -1 : 1);
6095 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6097 return detect_input_pending () ? Qnil
: Qt
;
6101 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6102 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
6103 SECONDS may be a floating-point value, meaning that you can wait for a\n\
6104 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
6105 additional wait period, in milliseconds; this may be useful if your\n\
6106 Emacs was built without floating point support.\n\
6107 \(Not all operating systems support waiting for a fraction of a second.)\n\
6108 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
6109 Redisplay is preempted as always if input arrives, and does not happen\n\
6110 if input is available before it starts.\n\
6111 Value is t if waited the full time with no input arriving.")
6112 (seconds
, milliseconds
, nodisp
)
6113 Lisp_Object seconds
, milliseconds
, nodisp
;
6117 if (NILP (milliseconds
))
6118 XSETINT (milliseconds
, 0);
6120 CHECK_NUMBER (milliseconds
, 1);
6121 usec
= XINT (milliseconds
) * 1000;
6124 double duration
= extract_float (seconds
);
6125 sec
= (int) duration
;
6126 usec
+= (duration
- sec
) * 1000000;
6129 #ifndef EMACS_HAS_USECS
6130 if (usec
!= 0 && sec
== 0)
6131 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6134 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6139 /***********************************************************************
6140 Other Lisp Functions
6141 ***********************************************************************/
6143 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6144 session's frames, frame names, buffers, buffer-read-only flags, and
6145 buffer-modified-flags, and a trailing sentinel (so we don't need to
6146 add length checks). */
6148 static Lisp_Object frame_and_buffer_state
;
6151 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6152 Sframe_or_buffer_changed_p
, 0, 0, 0,
6153 "Return non-nil if the frame and buffer state appears to have changed.\n\
6154 The state variable is an internal vector containing all frames and buffers,\n\
6155 aside from buffers whose names start with space,\n\
6156 along with the buffers' read-only and modified flags, which allows a fast\n\
6157 check to see whether the menu bars might need to be recomputed.\n\
6158 If this function returns non-nil, it updates the internal vector to reflect\n\
6159 the current state.\n")
6162 Lisp_Object tail
, frame
, buf
;
6166 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6167 FOR_EACH_FRAME (tail
, frame
)
6169 if (!EQ (*vecp
++, frame
))
6171 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6174 /* Check that the buffer info matches.
6175 No need to test for the end of the vector
6176 because the last element of the vector is lambda
6177 and that will always cause a mismatch. */
6178 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6180 buf
= XCDR (XCAR (tail
));
6181 /* Ignore buffers that aren't included in buffer lists. */
6182 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6184 if (!EQ (*vecp
++, buf
))
6186 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6188 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6191 /* Detect deletion of a buffer at the end of the list. */
6192 if (EQ (*vecp
, Qlambda
))
6195 /* Start with 1 so there is room for at least one lambda at the end. */
6197 FOR_EACH_FRAME (tail
, frame
)
6199 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6201 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6202 if (n
> XVECTOR (frame_and_buffer_state
)->size
6203 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6204 /* Add 20 extra so we grow it less often. */
6205 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6206 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6207 FOR_EACH_FRAME (tail
, frame
)
6210 *vecp
++ = XFRAME (frame
)->name
;
6212 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6214 buf
= XCDR (XCAR (tail
));
6215 /* Ignore buffers that aren't included in buffer lists. */
6216 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6219 *vecp
++ = XBUFFER (buf
)->read_only
;
6220 *vecp
++ = Fbuffer_modified_p (buf
);
6222 /* Fill up the vector with lambdas (always at least one). */
6224 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6225 < XVECTOR (frame_and_buffer_state
)->size
)
6227 /* Make sure we didn't overflow the vector. */
6228 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6229 > XVECTOR (frame_and_buffer_state
)->size
)
6236 /***********************************************************************
6238 ***********************************************************************/
6240 char *terminal_type
;
6242 /* Initialization done when Emacs fork is started, before doing stty.
6243 Determine terminal type and set terminal_driver. Then invoke its
6244 decoding routine to set up variables in the terminal package. */
6249 #ifdef HAVE_X_WINDOWS
6250 extern int display_arg
;
6253 /* Construct the space glyph. */
6254 space_glyph
.type
= CHAR_GLYPH
;
6255 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6256 space_glyph
.charpos
= -1;
6260 cursor_in_echo_area
= 0;
6261 terminal_type
= (char *) 0;
6263 /* Now is the time to initialize this; it's used by init_sys_modes
6265 Vwindow_system
= Qnil
;
6267 /* If the user wants to use a window system, we shouldn't bother
6268 initializing the terminal. This is especially important when the
6269 terminal is so dumb that emacs gives up before and doesn't bother
6270 using the window system.
6272 If the DISPLAY environment variable is set and nonempty,
6273 try to use X, and die with an error message if that doesn't work. */
6275 #ifdef HAVE_X_WINDOWS
6280 display
= getenv ("DECW$DISPLAY");
6282 display
= getenv ("DISPLAY");
6285 display_arg
= (display
!= 0 && *display
!= 0);
6288 if (!inhibit_window_system
&& display_arg
6294 Vwindow_system
= intern ("x");
6296 Vwindow_system_version
= make_number (11);
6298 Vwindow_system_version
= make_number (10);
6300 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6301 /* In some versions of ncurses,
6302 tputs crashes if we have not called tgetent.
6304 { char b
[2044]; tgetent (b
, "xterm");}
6306 adjust_frame_glyphs_initially ();
6309 #endif /* HAVE_X_WINDOWS */
6312 if (!inhibit_window_system
)
6314 Vwindow_system
= intern ("w32");
6315 Vwindow_system_version
= make_number (1);
6316 adjust_frame_glyphs_initially ();
6319 #endif /* HAVE_NTGUI */
6322 if (!inhibit_window_system
)
6324 Vwindow_system
= intern ("mac");
6325 Vwindow_system_version
= make_number (1);
6326 adjust_frame_glyphs_initially ();
6329 #endif /* macintosh */
6331 /* If no window system has been specified, try to use the terminal. */
6334 fatal ("standard input is not a tty");
6338 /* Look at the TERM variable */
6339 terminal_type
= (char *) getenv ("TERM");
6343 fprintf (stderr
, "Please specify your terminal type.\n\
6344 For types defined in VMS, use set term /device=TYPE.\n\
6345 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6346 \(The quotation marks are necessary since terminal types are lower case.)\n");
6348 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6354 /* VMS DCL tends to up-case things, so down-case term type.
6355 Hardly any uppercase letters in terminal types; should be none. */
6357 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6360 strcpy (new, terminal_type
);
6362 for (p
= new; *p
; p
++)
6366 terminal_type
= new;
6370 term_init (terminal_type
);
6373 struct frame
*sf
= SELECTED_FRAME ();
6374 int width
= FRAME_WINDOW_WIDTH (sf
);
6375 int height
= FRAME_HEIGHT (sf
);
6377 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6379 /* If these sizes are so big they cause overflow, just ignore the
6380 change. It's not clear what better we could do. */
6381 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6382 fatal ("screen size %dx%d too big", width
, height
);
6385 adjust_frame_glyphs_initially ();
6386 calculate_costs (XFRAME (selected_frame
));
6391 #endif /* CANNOT_DUMP */
6392 signal (SIGWINCH
, window_change_signal
);
6393 #endif /* SIGWINCH */
6395 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6399 /* The MSDOS terminal turns on its ``window system'' relatively
6400 late into the startup, so we cannot do the frame faces'
6401 initialization just yet. It will be done later by pc-win.el
6402 and internal_terminal_init. */
6403 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6405 && NILP (Vwindow_system
))
6407 /* For the initial frame, we don't have any way of knowing what
6408 are the foreground and background colors of the terminal. */
6409 struct frame
*sf
= SELECTED_FRAME();
6411 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6412 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6413 call0 (intern ("tty-set-up-initial-frame-faces"));
6419 /***********************************************************************
6421 ***********************************************************************/
6423 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6424 Sinternal_show_cursor
, 2, 2, 0,
6425 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6426 WINDOW nil means use the selected window. SHOW non-nil means\n\
6427 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6428 don't show a cursor.")
6430 Lisp_Object window
, show
;
6432 /* Don't change cursor state while redisplaying. This could confuse
6434 if (!redisplaying_p
)
6437 window
= selected_window
;
6439 CHECK_WINDOW (window
, 2);
6441 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6448 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6449 Sinternal_show_cursor_p
, 0, 1, 0,
6450 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6451 WINDOW nil or omitted means report on the selected window.")
6458 window
= selected_window
;
6460 CHECK_WINDOW (window
, 2);
6462 w
= XWINDOW (window
);
6463 return w
->cursor_off_p
? Qnil
: Qt
;
6467 /***********************************************************************
6469 ***********************************************************************/
6474 defsubr (&Sredraw_frame
);
6475 defsubr (&Sredraw_display
);
6476 defsubr (&Sframe_or_buffer_changed_p
);
6477 defsubr (&Sopen_termscript
);
6479 defsubr (&Ssit_for
);
6480 defsubr (&Ssleep_for
);
6481 defsubr (&Ssend_string_to_terminal
);
6482 defsubr (&Sinternal_show_cursor
);
6483 defsubr (&Sinternal_show_cursor_p
);
6486 defsubr (&Sdump_redisplay_history
);
6489 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6490 staticpro (&frame_and_buffer_state
);
6492 Qdisplay_table
= intern ("display-table");
6493 staticpro (&Qdisplay_table
);
6494 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6495 staticpro (&Qredisplay_dont_pause
);
6497 DEFVAR_INT ("baud-rate", &baud_rate
,
6498 "*The output baud rate of the terminal.\n\
6499 On most systems, changing this value will affect the amount of padding\n\
6500 and the other strategic decisions made during redisplay.");
6502 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6503 "*Non-nil means invert the entire frame display.\n\
6504 This means everything is in inverse video which otherwise would not be.");
6506 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6507 "*Non-nil means try to flash the frame to represent a bell.");
6509 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6510 "*Non-nil means no need to redraw entire frame after suspending.\n\
6511 A non-nil value is useful if the terminal can automatically preserve\n\
6512 Emacs's frame display when you reenter Emacs.\n\
6513 It is up to you to set this variable if your terminal can do that.");
6515 DEFVAR_LISP ("window-system", &Vwindow_system
,
6516 "A symbol naming the window-system under which Emacs is running\n\
6517 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6519 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6520 "The version number of the window system in use.\n\
6521 For X windows, this is 10 or 11.");
6523 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6524 "Non-nil means put cursor in minibuffer, at end of any message there.");
6526 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6527 "Table defining how to output a glyph code to the frame.\n\
6528 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6529 Each element can be:\n\
6530 integer: a glyph code which this glyph is an alias for.\n\
6531 string: output this glyph using that string (not impl. in X windows).\n\
6532 nil: this glyph mod 256 is char code to output,\n\
6533 and this glyph / 256 is face code for X windows (see `face-id').");
6534 Vglyph_table
= Qnil
;
6536 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6537 "Display table to use for buffers that specify none.\n\
6538 See `buffer-display-table' for more information.");
6539 Vstandard_display_table
= Qnil
;
6541 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6542 "*Non-nil means update isn't paused when input is detected.");
6543 redisplay_dont_pause
= 0;
6545 /* Initialize `window-system', unless init_display already decided it. */
6550 Vwindow_system
= Qnil
;
6551 Vwindow_system_version
= Qnil
;