1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 #include "syssignal.h"
54 #endif /* HAVE_X_WINDOWS */
58 #endif /* HAVE_NTGUI */
64 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
69 /* To get the prototype for `sleep'. */
75 /* Get number of chars of output now in the buffer of a stdio stream.
76 This ought to be built in in stdio, but it isn't. Some s- files
77 override this because their stdio internals differ. */
79 #ifdef __GNU_LIBRARY__
81 /* The s- file might have overridden the definition with one that
82 works for the system's C library. But we are using the GNU C
83 library, so this is the right definition for every system. */
85 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
86 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
88 #undef PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
91 #else /* not __GNU_LIBRARY__ */
92 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
93 #include <stdio_ext.h>
94 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
96 #ifndef PENDING_OUTPUT_COUNT
97 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
99 #endif /* not __GNU_LIBRARY__ */
101 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
102 #include <term.h> /* for tgetent */
105 /* Structure to pass dimensions around. Used for character bounding
106 boxes, glyph matrix dimensions and alike. */
115 /* Function prototypes. */
117 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
118 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
119 static int showing_window_margins_p
P_ ((struct window
*));
120 static void fake_current_matrices
P_ ((Lisp_Object
));
121 static void redraw_overlapping_rows
P_ ((struct window
*, int));
122 static void redraw_overlapped_rows
P_ ((struct window
*, int));
123 static int count_blanks
P_ ((struct glyph
*, int));
124 static int count_match
P_ ((struct glyph
*, struct glyph
*,
125 struct glyph
*, struct glyph
*));
126 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
127 static void update_frame_line
P_ ((struct frame
*, int));
128 static struct dim allocate_matrices_for_frame_redisplay
129 P_ ((Lisp_Object
, int, int, int, int *));
130 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
131 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
132 static void adjust_frame_glyphs
P_ ((struct frame
*));
133 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
134 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
135 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
136 int, int, struct dim
));
137 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
138 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
140 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
143 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
145 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
147 static struct glyph_pool
*new_glyph_pool
P_ ((void));
148 static void free_glyph_pool
P_ ((struct glyph_pool
*));
149 static void adjust_frame_glyphs_initially
P_ ((void));
150 static void adjust_frame_message_buffer
P_ ((struct frame
*));
151 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
152 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
153 static void build_frame_matrix
P_ ((struct frame
*));
154 void clear_current_matrices
P_ ((struct frame
*));
155 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
157 static void clear_window_matrices
P_ ((struct window
*, int));
158 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
159 static int scrolling_window
P_ ((struct window
*, int));
160 static int update_window_line
P_ ((struct window
*, int, int *));
161 static void update_marginal_area
P_ ((struct window
*, int, int));
162 static int update_text_area
P_ ((struct window
*, int));
163 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
165 static void mirror_make_current
P_ ((struct window
*, int));
166 void check_window_matrix_pointers
P_ ((struct window
*));
168 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
169 struct glyph_matrix
*));
171 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
172 static int update_window_tree
P_ ((struct window
*, int));
173 static int update_window
P_ ((struct window
*, int));
174 static int update_frame_1
P_ ((struct frame
*, int, int));
175 static void set_window_cursor_after_update
P_ ((struct window
*));
176 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
177 struct glyph_row
*, int));
178 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
179 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
180 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
181 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
182 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
183 struct window
*frame_row_to_window
P_ ((struct window
*, int));
186 /* Non-zero means don't pause redisplay for pending input. (This is
187 for debugging and for a future implementation of EDT-like
190 int redisplay_dont_pause
;
192 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
193 are supported, so we can check for input during redisplay at
194 regular intervals. */
195 #ifdef EMACS_HAS_USECS
196 #define PERIODIC_PREEMPTION_CHECKING 1
198 #define PERIODIC_PREEMPTION_CHECKING 0
201 #if PERIODIC_PREEMPTION_CHECKING
203 /* If a number (float), check for user input every N seconds. */
205 Lisp_Object Vredisplay_preemption_period
;
207 /* Redisplay preemption timers. */
209 static EMACS_TIME preemption_period
;
210 static EMACS_TIME preemption_next_check
;
214 /* Nonzero upon entry to redisplay means do not assume anything about
215 current contents of actual terminal frame; clear and redraw it. */
219 /* Nonzero means last display completed. Zero means it was preempted. */
221 int display_completed
;
223 /* Lisp variable visible-bell; enables use of screen-flash instead of
228 /* Invert the color of the whole frame, at a low level. */
232 /* Line speed of the terminal. */
236 /* Either nil or a symbol naming the window system under which Emacs
237 creates the first frame. */
239 Lisp_Object Vinitial_window_system
;
241 /* Version number of X windows: 10, 11 or nil. */
243 Lisp_Object Vwindow_system_version
;
245 /* Vector of glyph definitions. Indexed by glyph number, the contents
246 are a string which is how to output the glyph.
248 If Vglyph_table is nil, a glyph is output by using its low 8 bits
251 This is an obsolete feature that is no longer used. The variable
252 is retained for compatibility. */
254 Lisp_Object Vglyph_table
;
256 /* Display table to use for vectors that don't specify their own. */
258 Lisp_Object Vstandard_display_table
;
260 /* Nonzero means reading single-character input with prompt so put
261 cursor on mini-buffer after the prompt. Positive means at end of
262 text in echo area; negative means at beginning of line. */
264 int cursor_in_echo_area
;
266 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
269 /* The currently selected frame. In a single-frame version, this
270 variable always equals the_only_frame. */
272 Lisp_Object selected_frame
;
274 /* A frame which is not just a mini-buffer, or 0 if there are no such
275 frames. This is usually the most recent such frame that was
276 selected. In a single-frame version, this variable always holds
277 the address of the_only_frame. */
279 struct frame
*last_nonminibuf_frame
;
281 /* 1 means SIGWINCH happened when not safe. */
283 int delayed_size_change
;
285 /* 1 means glyph initialization has been completed at startup. */
287 static int glyphs_initialized_initially_p
;
289 /* Updated window if != 0. Set by update_window. */
291 struct window
*updated_window
;
293 /* Glyph row updated in update_window_line, and area that is updated. */
295 struct glyph_row
*updated_row
;
298 /* A glyph for a space. */
300 struct glyph space_glyph
;
302 /* Counts of allocated structures. These counts serve to diagnose
303 memory leaks and double frees. */
305 int glyph_matrix_count
;
306 int glyph_pool_count
;
308 /* If non-null, the frame whose frame matrices are manipulated. If
309 null, window matrices are worked on. */
311 static struct frame
*frame_matrix_frame
;
313 /* Non-zero means that fonts have been loaded since the last glyph
314 matrix adjustments. Redisplay must stop, and glyph matrices must
315 be adjusted when this flag becomes non-zero during display. The
316 reason fonts can be loaded so late is that fonts of fontsets are
317 loaded on demand. Another reason is that a line contains many
318 characters displayed by zero width or very narrow glyphs of
319 variable-width fonts. */
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));
361 /* Add to the redisplay history how window W has been displayed.
362 MSG is a trace containing the information how W's glyph matrix
363 has been constructed. PAUSED_P non-zero means that the update
364 has been interrupted for pending input. */
367 add_window_display_history (w
, msg
, paused_p
)
374 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
376 buf
= redisplay_history
[history_idx
].trace
;
379 sprintf (buf
, "%d: window %p (`%s')%s\n",
382 ((BUFFERP (w
->buffer
)
383 && STRINGP (XBUFFER (w
->buffer
)->name
))
384 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
386 paused_p
? " ***paused***" : "");
391 /* Add to the redisplay history that frame F has been displayed.
392 PAUSED_P non-zero means that the update has been interrupted for
396 add_frame_display_history (f
, paused_p
)
402 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
404 buf
= redisplay_history
[history_idx
].trace
;
407 sprintf (buf
, "%d: update frame %p%s",
409 f
, paused_p
? " ***paused***" : "");
413 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
414 Sdump_redisplay_history
, 0, 0, "",
415 doc
: /* Dump redisplay history to stderr. */)
420 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
423 i
= REDISPLAY_HISTORY_SIZE
- 1;
424 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
431 #else /* GLYPH_DEBUG == 0 */
433 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
434 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
436 #endif /* GLYPH_DEBUG == 0 */
439 /* Like bcopy except never gets confused by overlap. Let this be the
440 first function defined in this file, or change emacs.c where the
441 address of this function is used. */
444 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 const 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
->total_cols
);
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_width
= -1, window_height
= -1;
630 /* See if W had a header line that has disappeared now, or vice versa.
634 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
636 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
637 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
639 matrix
->header_line_p
= header_line_p
;
641 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
642 Do nothing if MATRIX' size, position, vscroll, and marginal areas
643 haven't changed. This optimization is important because preserving
644 the matrix means preventing redisplay. */
645 if (matrix
->pool
== NULL
)
647 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
648 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
649 xassert (left
>= 0 && right
>= 0);
650 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
651 || right
!= matrix
->right_margin_glyphs
);
653 if (!marginal_areas_changed_p
655 && !header_line_changed_p
656 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
657 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
658 && matrix
->window_height
== window_height
659 && matrix
->window_vscroll
== w
->vscroll
660 && matrix
->window_width
== window_width
)
664 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
665 if (matrix
->rows_allocated
< dim
.height
)
667 int size
= dim
.height
* sizeof (struct glyph_row
);
668 new_rows
= dim
.height
- matrix
->rows_allocated
;
669 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
670 bzero (matrix
->rows
+ matrix
->rows_allocated
,
671 new_rows
* sizeof *matrix
->rows
);
672 matrix
->rows_allocated
= dim
.height
;
677 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
678 on a frame not using window-based redisplay. Set up pointers for
679 each row into the glyph pool. */
682 xassert (matrix
->pool
->glyphs
);
686 left
= margin_glyphs_to_reserve (w
, dim
.width
,
687 w
->left_margin_cols
);
688 right
= margin_glyphs_to_reserve (w
, dim
.width
,
689 w
->right_margin_cols
);
694 for (i
= 0; i
< dim
.height
; ++i
)
696 struct glyph_row
*row
= &matrix
->rows
[i
];
698 row
->glyphs
[LEFT_MARGIN_AREA
]
699 = (matrix
->pool
->glyphs
700 + (y
+ i
) * matrix
->pool
->ncolumns
704 || row
== matrix
->rows
+ dim
.height
- 1
705 || (row
== matrix
->rows
&& matrix
->header_line_p
))
707 row
->glyphs
[TEXT_AREA
]
708 = row
->glyphs
[LEFT_MARGIN_AREA
];
709 row
->glyphs
[RIGHT_MARGIN_AREA
]
710 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
711 row
->glyphs
[LAST_AREA
]
712 = row
->glyphs
[RIGHT_MARGIN_AREA
];
716 row
->glyphs
[TEXT_AREA
]
717 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
718 row
->glyphs
[RIGHT_MARGIN_AREA
]
719 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
720 row
->glyphs
[LAST_AREA
]
721 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
725 matrix
->left_margin_glyphs
= left
;
726 matrix
->right_margin_glyphs
= right
;
730 /* If MATRIX->pool is null, MATRIX is responsible for managing
731 its own memory. It is a window matrix for window-based redisplay.
732 Allocate glyph memory from the heap. */
733 if (dim
.width
> matrix
->matrix_w
735 || header_line_changed_p
736 || marginal_areas_changed_p
)
738 struct glyph_row
*row
= matrix
->rows
;
739 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
743 row
->glyphs
[LEFT_MARGIN_AREA
]
744 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
746 * sizeof (struct glyph
)));
748 /* The mode line never has marginal areas. */
749 if (row
== matrix
->rows
+ dim
.height
- 1
750 || (row
== matrix
->rows
&& matrix
->header_line_p
))
752 row
->glyphs
[TEXT_AREA
]
753 = row
->glyphs
[LEFT_MARGIN_AREA
];
754 row
->glyphs
[RIGHT_MARGIN_AREA
]
755 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
756 row
->glyphs
[LAST_AREA
]
757 = row
->glyphs
[RIGHT_MARGIN_AREA
];
761 row
->glyphs
[TEXT_AREA
]
762 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
763 row
->glyphs
[RIGHT_MARGIN_AREA
]
764 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
765 row
->glyphs
[LAST_AREA
]
766 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
772 xassert (left
>= 0 && right
>= 0);
773 matrix
->left_margin_glyphs
= left
;
774 matrix
->right_margin_glyphs
= right
;
777 /* Number of rows to be used by MATRIX. */
778 matrix
->nrows
= dim
.height
;
779 xassert (matrix
->nrows
>= 0);
783 if (matrix
== w
->current_matrix
)
785 /* Mark rows in a current matrix of a window as not having
786 valid contents. It's important to not do this for
787 desired matrices. When Emacs starts, it may already be
788 building desired matrices when this function runs. */
789 if (window_width
< 0)
790 window_width
= window_box_width (w
, -1);
792 /* Optimize the case that only the height has changed (C-x 2,
793 upper window). Invalidate all rows that are no longer part
795 if (!marginal_areas_changed_p
796 && !header_line_changed_p
798 && dim
.width
== matrix
->matrix_w
799 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
800 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
801 && matrix
->window_width
== window_width
)
803 /* Find the last row in the window. */
804 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
805 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
811 /* Window end is invalid, if inside of the rows that
812 are invalidated below. */
813 if (INTEGERP (w
->window_end_vpos
)
814 && XFASTINT (w
->window_end_vpos
) >= i
)
815 w
->window_end_valid
= Qnil
;
817 while (i
< matrix
->nrows
)
818 matrix
->rows
[i
++].enabled_p
= 0;
822 for (i
= 0; i
< matrix
->nrows
; ++i
)
823 matrix
->rows
[i
].enabled_p
= 0;
826 else if (matrix
== w
->desired_matrix
)
828 /* Rows in desired matrices always have to be cleared;
829 redisplay expects this is the case when it runs, so it
830 had better be the case when we adjust matrices between
832 for (i
= 0; i
< matrix
->nrows
; ++i
)
833 matrix
->rows
[i
].enabled_p
= 0;
838 /* Remember last values to be able to optimize frame redraws. */
839 matrix
->matrix_x
= x
;
840 matrix
->matrix_y
= y
;
841 matrix
->matrix_w
= dim
.width
;
842 matrix
->matrix_h
= dim
.height
;
844 /* Record the top y location and height of W at the time the matrix
845 was last adjusted. This is used to optimize redisplay above. */
848 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
849 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
850 matrix
->window_height
= window_height
;
851 matrix
->window_width
= window_width
;
852 matrix
->window_vscroll
= w
->vscroll
;
857 /* Reverse the contents of rows in MATRIX between START and END. The
858 contents of the row at END - 1 end up at START, END - 2 at START +
859 1 etc. This is part of the implementation of rotate_matrix (see
863 reverse_rows (matrix
, start
, end
)
864 struct glyph_matrix
*matrix
;
869 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
871 /* Non-ISO HP/UX compiler doesn't like auto struct
873 struct glyph_row temp
;
874 temp
= matrix
->rows
[i
];
875 matrix
->rows
[i
] = matrix
->rows
[j
];
876 matrix
->rows
[j
] = temp
;
881 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
882 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
883 indices. (Note: this does not copy glyphs, only glyph pointers in
884 row structures are moved around).
886 The algorithm used for rotating the vector was, I believe, first
887 described by Kernighan. See the vector R as consisting of two
888 sub-vectors AB, where A has length BY for BY >= 0. The result
889 after rotating is then BA. Reverse both sub-vectors to get ArBr
890 and reverse the result to get (ArBr)r which is BA. Similar for
894 rotate_matrix (matrix
, first
, last
, by
)
895 struct glyph_matrix
*matrix
;
900 /* Up (rotate left, i.e. towards lower indices). */
902 reverse_rows (matrix
, first
, first
+ by
);
903 reverse_rows (matrix
, first
+ by
, last
);
904 reverse_rows (matrix
, first
, last
);
908 /* Down (rotate right, i.e. towards higher indices). */
909 reverse_rows (matrix
, last
- by
, last
);
910 reverse_rows (matrix
, first
, last
- by
);
911 reverse_rows (matrix
, first
, last
);
916 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
917 with indices START <= index < END. Increment positions by DELTA/
921 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
922 struct glyph_matrix
*matrix
;
923 int start
, end
, delta
, delta_bytes
;
925 /* Check that START and END are reasonable values. */
926 xassert (start
>= 0 && start
<= matrix
->nrows
);
927 xassert (end
>= 0 && end
<= matrix
->nrows
);
928 xassert (start
<= end
);
930 for (; start
< end
; ++start
)
931 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
935 /* Enable a range of rows in glyph matrix MATRIX. START and END are
936 the row indices of the first and last + 1 row to enable. If
937 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
940 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
941 struct glyph_matrix
*matrix
;
945 xassert (start
<= end
);
946 xassert (start
>= 0 && start
< matrix
->nrows
);
947 xassert (end
>= 0 && end
<= matrix
->nrows
);
949 for (; start
< end
; ++start
)
950 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
956 This empties all rows in MATRIX by setting the enabled_p flag for
957 all rows of the matrix to zero. The function prepare_desired_row
958 will eventually really clear a row when it sees one with a zero
961 Resets update hints to defaults value. The only update hint
962 currently present is the flag MATRIX->no_scrolling_p. */
965 clear_glyph_matrix (matrix
)
966 struct glyph_matrix
*matrix
;
970 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
971 matrix
->no_scrolling_p
= 0;
976 /* Shift part of the glyph matrix MATRIX of window W up or down.
977 Increment y-positions in glyph rows between START and END by DY,
978 and recompute their visible height. */
981 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
983 struct glyph_matrix
*matrix
;
988 xassert (start
<= end
);
989 xassert (start
>= 0 && start
< matrix
->nrows
);
990 xassert (end
>= 0 && end
<= matrix
->nrows
);
992 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
993 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
995 for (; start
< end
; ++start
)
997 struct glyph_row
*row
= &matrix
->rows
[start
];
1000 row
->visible_height
= row
->height
;
1003 row
->visible_height
-= min_y
- row
->y
;
1004 if (row
->y
+ row
->height
> max_y
)
1005 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1010 /* Mark all rows in current matrices of frame F as invalid. Marking
1011 invalid is done by setting enabled_p to zero for all rows in a
1015 clear_current_matrices (f
)
1016 register struct frame
*f
;
1018 /* Clear frame current matrix, if we have one. */
1019 if (f
->current_matrix
)
1020 clear_glyph_matrix (f
->current_matrix
);
1022 /* Clear the matrix of the menu bar window, if such a window exists.
1023 The menu bar window is currently used to display menus on X when
1024 no toolkit support is compiled in. */
1025 if (WINDOWP (f
->menu_bar_window
))
1026 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1028 /* Clear the matrix of the tool-bar window, if any. */
1029 if (WINDOWP (f
->tool_bar_window
))
1030 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1032 /* Clear current window matrices. */
1033 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1034 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1038 /* Clear out all display lines of F for a coming redisplay. */
1041 clear_desired_matrices (f
)
1042 register struct frame
*f
;
1044 if (f
->desired_matrix
)
1045 clear_glyph_matrix (f
->desired_matrix
);
1047 if (WINDOWP (f
->menu_bar_window
))
1048 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1050 if (WINDOWP (f
->tool_bar_window
))
1051 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1053 /* Do it for window matrices. */
1054 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1055 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1059 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1060 non-zero clear desired matrices, otherwise clear current matrices. */
1063 clear_window_matrices (w
, desired_p
)
1069 if (!NILP (w
->hchild
))
1071 xassert (WINDOWP (w
->hchild
));
1072 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1074 else if (!NILP (w
->vchild
))
1076 xassert (WINDOWP (w
->vchild
));
1077 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1082 clear_glyph_matrix (w
->desired_matrix
);
1085 clear_glyph_matrix (w
->current_matrix
);
1086 w
->window_end_valid
= Qnil
;
1090 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1096 /***********************************************************************
1099 See dispextern.h for an overall explanation of glyph rows.
1100 ***********************************************************************/
1102 /* Clear glyph row ROW. Do it in a way that makes it robust against
1103 changes in the glyph_row structure, i.e. addition or removal of
1104 structure members. */
1106 static struct glyph_row null_row
;
1109 clear_glyph_row (row
)
1110 struct glyph_row
*row
;
1112 struct glyph
*p
[1 + LAST_AREA
];
1114 /* Save pointers. */
1115 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1116 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1117 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1118 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1123 /* Restore pointers. */
1124 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1125 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1126 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1127 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1129 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1130 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1131 Redisplay outputs such glyphs, and flickering effects were
1132 the result. This also depended on the contents of memory
1133 returned by xmalloc. If flickering happens again, activate
1134 the code below. If the flickering is gone with that, chances
1135 are that the flickering has the same reason as here. */
1136 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1141 /* Make ROW an empty, enabled row of canonical character height,
1142 in window W starting at y-position Y. */
1145 blank_row (w
, row
, y
)
1147 struct glyph_row
*row
;
1152 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1153 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1155 clear_glyph_row (row
);
1157 row
->ascent
= row
->phys_ascent
= 0;
1158 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1159 row
->visible_height
= row
->height
;
1162 row
->visible_height
-= min_y
- row
->y
;
1163 if (row
->y
+ row
->height
> max_y
)
1164 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1170 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1171 are the amounts by which to change positions. Note that the first
1172 glyph of the text area of a row can have a buffer position even if
1173 the used count of the text area is zero. Such rows display line
1177 increment_row_positions (row
, delta
, delta_bytes
)
1178 struct glyph_row
*row
;
1179 int delta
, delta_bytes
;
1183 /* Increment start and end positions. */
1184 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1185 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1186 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1187 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1188 CHARPOS (row
->start
.pos
) += delta
;
1189 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1190 CHARPOS (row
->end
.pos
) += delta
;
1191 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1193 if (!row
->enabled_p
)
1196 /* Increment positions in glyphs. */
1197 for (area
= 0; area
< LAST_AREA
; ++area
)
1198 for (i
= 0; i
< row
->used
[area
]; ++i
)
1199 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1200 && row
->glyphs
[area
][i
].charpos
> 0)
1201 row
->glyphs
[area
][i
].charpos
+= delta
;
1203 /* Capture the case of rows displaying a line end. */
1204 if (row
->used
[TEXT_AREA
] == 0
1205 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1206 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1211 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1212 contents, i.e. glyph structure contents are exchanged between A and
1213 B without changing glyph pointers in A and B. */
1216 swap_glyphs_in_rows (a
, b
)
1217 struct glyph_row
*a
, *b
;
1221 for (area
= 0; area
< LAST_AREA
; ++area
)
1223 /* Number of glyphs to swap. */
1224 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1226 /* Start of glyphs in area of row A. */
1227 struct glyph
*glyph_a
= a
->glyphs
[area
];
1229 /* End + 1 of glyphs in area of row A. */
1230 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1232 /* Start of glyphs in area of row B. */
1233 struct glyph
*glyph_b
= b
->glyphs
[area
];
1235 while (glyph_a
< glyph_a_end
)
1237 /* Non-ISO HP/UX compiler doesn't like auto struct
1241 *glyph_a
= *glyph_b
;
1251 /* Exchange pointers to glyph memory between glyph rows A and B. */
1254 swap_glyph_pointers (a
, b
)
1255 struct glyph_row
*a
, *b
;
1258 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1260 struct glyph
*temp
= a
->glyphs
[i
];
1261 a
->glyphs
[i
] = b
->glyphs
[i
];
1262 b
->glyphs
[i
] = temp
;
1267 /* Copy glyph row structure FROM to glyph row structure TO, except
1268 that glyph pointers in the structures are left unchanged. */
1271 copy_row_except_pointers (to
, from
)
1272 struct glyph_row
*to
, *from
;
1274 struct glyph
*pointers
[1 + LAST_AREA
];
1276 /* Save glyph pointers of TO. */
1277 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1279 /* Do a structure assignment. */
1282 /* Restore original pointers of TO. */
1283 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1287 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1288 TO and FROM are left unchanged. Glyph contents are copied from the
1289 glyph memory of FROM to the glyph memory of TO. Increment buffer
1290 positions in row TO by DELTA/ DELTA_BYTES. */
1293 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1294 struct glyph_row
*to
, *from
;
1295 int delta
, delta_bytes
;
1299 /* This is like a structure assignment TO = FROM, except that
1300 glyph pointers in the rows are left unchanged. */
1301 copy_row_except_pointers (to
, from
);
1303 /* Copy glyphs from FROM to TO. */
1304 for (area
= 0; area
< LAST_AREA
; ++area
)
1305 if (from
->used
[area
])
1306 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1307 from
->used
[area
] * sizeof (struct glyph
));
1309 /* Increment buffer positions in TO by DELTA. */
1310 increment_row_positions (to
, delta
, delta_bytes
);
1314 /* Assign glyph row FROM to glyph row TO. This works like a structure
1315 assignment TO = FROM, except that glyph pointers are not copied but
1316 exchanged between TO and FROM. Pointers must be exchanged to avoid
1320 assign_row (to
, from
)
1321 struct glyph_row
*to
, *from
;
1323 swap_glyph_pointers (to
, from
);
1324 copy_row_except_pointers (to
, from
);
1328 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1329 a row in a window matrix, is a slice of the glyph memory of the
1330 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1331 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1332 memory of FRAME_ROW. */
1337 glyph_row_slice_p (window_row
, frame_row
)
1338 struct glyph_row
*window_row
, *frame_row
;
1340 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1341 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1342 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1344 return (frame_glyph_start
<= window_glyph_start
1345 && window_glyph_start
< frame_glyph_end
);
1348 #endif /* GLYPH_DEBUG */
1352 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1353 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1354 in WINDOW_MATRIX is found satisfying the condition. */
1356 static struct glyph_row
*
1357 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1358 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1363 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1365 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1366 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1367 frame_matrix
->rows
+ row
))
1370 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1375 /* Prepare ROW for display. Desired rows are cleared lazily,
1376 i.e. they are only marked as to be cleared by setting their
1377 enabled_p flag to zero. When a row is to be displayed, a prior
1378 call to this function really clears it. */
1381 prepare_desired_row (row
)
1382 struct glyph_row
*row
;
1384 if (!row
->enabled_p
)
1386 unsigned rp
= row
->reversed_p
;
1388 clear_glyph_row (row
);
1390 row
->reversed_p
= rp
;
1395 /* Return a hash code for glyph row ROW. */
1398 line_hash_code (row
)
1399 struct glyph_row
*row
;
1405 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1406 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1410 int c
= glyph
->u
.ch
;
1411 int face_id
= glyph
->face_id
;
1412 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1414 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1415 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1427 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1428 the number of characters in the line. If must_write_spaces is
1429 zero, leading and trailing spaces are ignored. */
1432 line_draw_cost (matrix
, vpos
)
1433 struct glyph_matrix
*matrix
;
1436 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1437 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1438 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1440 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1441 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1443 /* Ignore trailing and leading spaces if we can. */
1444 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1446 /* Skip from the end over trailing spaces. */
1447 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1450 /* All blank line. */
1454 /* Skip over leading spaces. */
1455 while (CHAR_GLYPH_SPACE_P (*beg
))
1459 /* If we don't have a glyph-table, each glyph is one character,
1460 so return the number of glyphs. */
1461 if (glyph_table_base
== 0)
1465 /* Otherwise, scan the glyphs and accumulate their total length
1472 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1474 if (GLYPH_INVALID_P (g
)
1475 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1478 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1488 /* Test two glyph rows A and B for equality. Value is non-zero if A
1489 and B have equal contents. W is the window to which the glyphs
1490 rows A and B belong. It is needed here to test for partial row
1491 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1492 flags of A and B, too. */
1495 row_equal_p (w
, a
, b
, mouse_face_p
)
1497 struct glyph_row
*a
, *b
;
1502 else if (a
->hash
!= b
->hash
)
1506 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1509 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1512 /* Compare glyphs. */
1513 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1515 if (a
->used
[area
] != b
->used
[area
])
1518 a_glyph
= a
->glyphs
[area
];
1519 a_end
= a_glyph
+ a
->used
[area
];
1520 b_glyph
= b
->glyphs
[area
];
1522 while (a_glyph
< a_end
1523 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1524 ++a_glyph
, ++b_glyph
;
1526 if (a_glyph
!= a_end
)
1530 if (a
->fill_line_p
!= b
->fill_line_p
1531 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1532 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1533 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1534 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1535 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1536 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1537 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1538 || a
->overlapped_p
!= b
->overlapped_p
1539 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1540 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1541 || a
->reversed_p
!= b
->reversed_p
1542 /* Different partially visible characters on left margin. */
1544 /* Different height. */
1545 || a
->ascent
!= b
->ascent
1546 || a
->phys_ascent
!= b
->phys_ascent
1547 || a
->phys_height
!= b
->phys_height
1548 || a
->visible_height
!= b
->visible_height
)
1557 /***********************************************************************
1560 See dispextern.h for an overall explanation of glyph pools.
1561 ***********************************************************************/
1563 /* Allocate a glyph_pool structure. The structure returned is
1564 initialized with zeros. The global variable glyph_pool_count is
1565 incremented for each pool allocated. */
1567 static struct glyph_pool
*
1570 struct glyph_pool
*result
;
1572 /* Allocate a new glyph_pool and clear it. */
1573 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1574 bzero (result
, sizeof *result
);
1576 /* For memory leak and double deletion checking. */
1583 /* Free a glyph_pool structure POOL. The function may be called with
1584 a null POOL pointer. The global variable glyph_pool_count is
1585 decremented with every pool structure freed. If this count gets
1586 negative, more structures were freed than allocated, i.e. one
1587 structure must have been freed more than once or a bogus pointer
1588 was passed to free_glyph_pool. */
1591 free_glyph_pool (pool
)
1592 struct glyph_pool
*pool
;
1596 /* More freed than allocated? */
1598 xassert (glyph_pool_count
>= 0);
1600 xfree (pool
->glyphs
);
1606 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1607 columns we need. This function never shrinks a pool. The only
1608 case in which this would make sense, would be when a frame's size
1609 is changed from a large value to a smaller one. But, if someone
1610 does it once, we can expect that he will do it again.
1612 Value is non-zero if the pool changed in a way which makes
1613 re-adjusting window glyph matrices necessary. */
1616 realloc_glyph_pool (pool
, matrix_dim
)
1617 struct glyph_pool
*pool
;
1618 struct dim matrix_dim
;
1623 changed_p
= (pool
->glyphs
== 0
1624 || matrix_dim
.height
!= pool
->nrows
1625 || matrix_dim
.width
!= pool
->ncolumns
);
1627 /* Enlarge the glyph pool. */
1628 needed
= matrix_dim
.width
* matrix_dim
.height
;
1629 if (needed
> pool
->nglyphs
)
1631 int size
= needed
* sizeof (struct glyph
);
1634 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1637 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1638 bzero (pool
->glyphs
, size
);
1641 pool
->nglyphs
= needed
;
1644 /* Remember the number of rows and columns because (a) we use them
1645 to do sanity checks, and (b) the number of columns determines
1646 where rows in the frame matrix start---this must be available to
1647 determine pointers to rows of window sub-matrices. */
1648 pool
->nrows
= matrix_dim
.height
;
1649 pool
->ncolumns
= matrix_dim
.width
;
1656 /***********************************************************************
1658 ***********************************************************************/
1663 /* Flush standard output. This is sometimes useful to call from the debugger.
1664 XXX Maybe this should be changed to flush the current terminal instead of
1675 /* Check that no glyph pointers have been lost in MATRIX. If a
1676 pointer has been lost, e.g. by using a structure assignment between
1677 rows, at least one pointer must occur more than once in the rows of
1681 check_matrix_pointer_lossage (matrix
)
1682 struct glyph_matrix
*matrix
;
1686 for (i
= 0; i
< matrix
->nrows
; ++i
)
1687 for (j
= 0; j
< matrix
->nrows
; ++j
)
1689 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1690 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1694 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1697 matrix_row (matrix
, row
)
1698 struct glyph_matrix
*matrix
;
1701 xassert (matrix
&& matrix
->rows
);
1702 xassert (row
>= 0 && row
< matrix
->nrows
);
1704 /* That's really too slow for normal testing because this function
1705 is called almost everywhere. Although---it's still astonishingly
1706 fast, so it is valuable to have for debugging purposes. */
1708 check_matrix_pointer_lossage (matrix
);
1711 return matrix
->rows
+ row
;
1715 #if 0 /* This function makes invalid assumptions when text is
1716 partially invisible. But it might come handy for debugging
1719 /* Check invariants that must hold for an up to date current matrix of
1723 check_matrix_invariants (w
)
1726 struct glyph_matrix
*matrix
= w
->current_matrix
;
1727 int yb
= window_text_bottom_y (w
);
1728 struct glyph_row
*row
= matrix
->rows
;
1729 struct glyph_row
*last_text_row
= NULL
;
1730 struct buffer
*saved
= current_buffer
;
1731 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1734 /* This can sometimes happen for a fresh window. */
1735 if (matrix
->nrows
< 2)
1738 set_buffer_temp (buffer
);
1740 /* Note: last row is always reserved for the mode line. */
1741 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1742 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1744 struct glyph_row
*next
= row
+ 1;
1746 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1747 last_text_row
= row
;
1749 /* Check that character and byte positions are in sync. */
1750 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1751 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1752 xassert (BYTEPOS (row
->start
.pos
)
1753 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1755 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1756 have such a position temporarily in case of a minibuffer
1757 displaying something like `[Sole completion]' at its end. */
1758 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1760 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1761 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1762 xassert (BYTEPOS (row
->end
.pos
)
1763 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1766 /* Check that end position of `row' is equal to start position
1768 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1770 xassert (MATRIX_ROW_END_CHARPOS (row
)
1771 == MATRIX_ROW_START_CHARPOS (next
));
1772 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1773 == MATRIX_ROW_START_BYTEPOS (next
));
1774 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1775 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1780 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1781 xassert (w
->desired_matrix
->rows
!= NULL
);
1782 set_buffer_temp (saved
);
1787 #endif /* GLYPH_DEBUG != 0 */
1791 /**********************************************************************
1792 Allocating/ Adjusting Glyph Matrices
1793 **********************************************************************/
1795 /* Allocate glyph matrices over a window tree for a frame-based
1798 X and Y are column/row within the frame glyph matrix where
1799 sub-matrices for the window tree rooted at WINDOW must be
1800 allocated. DIM_ONLY_P non-zero means that the caller of this
1801 function is only interested in the result matrix dimension, and
1802 matrix adjustments should not be performed.
1804 The function returns the total width/height of the sub-matrices of
1805 the window tree. If called on a frame root window, the computation
1806 will take the mini-buffer window into account.
1808 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1810 NEW_LEAF_MATRIX set if any window in the tree did not have a
1811 glyph matrices yet, and
1813 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1814 any window in the tree will be changed or have been changed (see
1817 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1820 Windows are arranged into chains of windows on the same level
1821 through the next fields of window structures. Such a level can be
1822 either a sequence of horizontally adjacent windows from left to
1823 right, or a sequence of vertically adjacent windows from top to
1824 bottom. Each window in a horizontal sequence can be either a leaf
1825 window or a vertical sequence; a window in a vertical sequence can
1826 be either a leaf or a horizontal sequence. All windows in a
1827 horizontal sequence have the same height, and all windows in a
1828 vertical sequence have the same width.
1830 This function uses, for historical reasons, a more general
1831 algorithm to determine glyph matrix dimensions that would be
1834 The matrix height of a horizontal sequence is determined by the
1835 maximum height of any matrix in the sequence. The matrix width of
1836 a horizontal sequence is computed by adding up matrix widths of
1837 windows in the sequence.
1839 |<------- result width ------->|
1840 +---------+----------+---------+ ---
1843 +---------+ | | result height
1848 The matrix width of a vertical sequence is the maximum matrix width
1849 of any window in the sequence. Its height is computed by adding up
1850 matrix heights of windows in the sequence.
1852 |<---- result width -->|
1860 +------------+---------+ |
1863 +------------+---------+ --- */
1865 /* Bit indicating that a new matrix will be allocated or has been
1868 #define NEW_LEAF_MATRIX (1 << 0)
1870 /* Bit indicating that a matrix will or has changed its location or
1873 #define CHANGED_LEAF_MATRIX (1 << 1)
1876 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1877 window_change_flags
)
1881 int *window_change_flags
;
1883 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1885 int wmax
= 0, hmax
= 0;
1889 int in_horz_combination_p
;
1891 /* What combination is WINDOW part of? Compute this once since the
1892 result is the same for all windows in the `next' chain. The
1893 special case of a root window (parent equal to nil) is treated
1894 like a vertical combination because a root window's `next'
1895 points to the mini-buffer window, if any, which is arranged
1896 vertically below other windows. */
1897 in_horz_combination_p
1898 = (!NILP (XWINDOW (window
)->parent
)
1899 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1901 /* For WINDOW and all windows on the same level. */
1904 w
= XWINDOW (window
);
1906 /* Get the dimension of the window sub-matrix for W, depending
1907 on whether this is a combination or a leaf window. */
1908 if (!NILP (w
->hchild
))
1909 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1911 window_change_flags
);
1912 else if (!NILP (w
->vchild
))
1913 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1915 window_change_flags
);
1918 /* If not already done, allocate sub-matrix structures. */
1919 if (w
->desired_matrix
== NULL
)
1921 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1922 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1923 *window_change_flags
|= NEW_LEAF_MATRIX
;
1926 /* Width and height MUST be chosen so that there are no
1927 holes in the frame matrix. */
1928 dim
.width
= required_matrix_width (w
);
1929 dim
.height
= required_matrix_height (w
);
1931 /* Will matrix be re-allocated? */
1932 if (x
!= w
->desired_matrix
->matrix_x
1933 || y
!= w
->desired_matrix
->matrix_y
1934 || dim
.width
!= w
->desired_matrix
->matrix_w
1935 || dim
.height
!= w
->desired_matrix
->matrix_h
1936 || (margin_glyphs_to_reserve (w
, dim
.width
,
1937 w
->left_margin_cols
)
1938 != w
->desired_matrix
->left_margin_glyphs
)
1939 || (margin_glyphs_to_reserve (w
, dim
.width
,
1940 w
->right_margin_cols
)
1941 != w
->desired_matrix
->right_margin_glyphs
))
1942 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1944 /* Actually change matrices, if allowed. Do not consider
1945 CHANGED_LEAF_MATRIX computed above here because the pool
1946 may have been changed which we don't now here. We trust
1947 that we only will be called with DIM_ONLY_P != 0 when
1951 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1952 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1956 /* If we are part of a horizontal combination, advance x for
1957 windows to the right of W; otherwise advance y for windows
1959 if (in_horz_combination_p
)
1964 /* Remember maximum glyph matrix dimensions. */
1965 wmax
= max (wmax
, dim
.width
);
1966 hmax
= max (hmax
, dim
.height
);
1968 /* Next window on same level. */
1971 while (!NILP (window
));
1973 /* Set `total' to the total glyph matrix dimension of this window
1974 level. In a vertical combination, the width is the width of the
1975 widest window; the height is the y we finally reached, corrected
1976 by the y we started with. In a horizontal combination, the total
1977 height is the height of the tallest window, and the width is the
1978 x we finally reached, corrected by the x we started with. */
1979 if (in_horz_combination_p
)
1981 total
.width
= x
- x0
;
1982 total
.height
= hmax
;
1987 total
.height
= y
- y0
;
1994 /* Return the required height of glyph matrices for window W. */
1997 required_matrix_height (w
)
2000 #ifdef HAVE_WINDOW_SYSTEM
2001 struct frame
*f
= XFRAME (w
->frame
);
2003 if (FRAME_WINDOW_P (f
))
2005 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2006 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
2007 return (((window_pixel_height
+ ch_height
- 1)
2008 / ch_height
) * w
->nrows_scale_factor
2009 /* One partially visible line at the top and
2010 bottom of the window. */
2012 /* 2 for header and mode line. */
2015 #endif /* HAVE_WINDOW_SYSTEM */
2017 return WINDOW_TOTAL_LINES (w
);
2021 /* Return the required width of glyph matrices for window W. */
2024 required_matrix_width (w
)
2027 #ifdef HAVE_WINDOW_SYSTEM
2028 struct frame
*f
= XFRAME (w
->frame
);
2029 if (FRAME_WINDOW_P (f
))
2031 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2032 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2034 /* Compute number of glyphs needed in a glyph row. */
2035 return (((window_pixel_width
+ ch_width
- 1)
2036 / ch_width
) * w
->ncols_scale_factor
2037 /* 2 partially visible columns in the text area. */
2039 /* One partially visible column at the right
2040 edge of each marginal area. */
2043 #endif /* HAVE_WINDOW_SYSTEM */
2045 return XINT (w
->total_cols
);
2049 /* Allocate window matrices for window-based redisplay. W is the
2050 window whose matrices must be allocated/reallocated. */
2053 allocate_matrices_for_window_redisplay (w
)
2058 if (!NILP (w
->vchild
))
2059 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2060 else if (!NILP (w
->hchild
))
2061 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2064 /* W is a leaf window. */
2067 /* If matrices are not yet allocated, allocate them now. */
2068 if (w
->desired_matrix
== NULL
)
2070 w
->desired_matrix
= new_glyph_matrix (NULL
);
2071 w
->current_matrix
= new_glyph_matrix (NULL
);
2074 dim
.width
= required_matrix_width (w
);
2075 dim
.height
= required_matrix_height (w
);
2076 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2077 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2080 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2085 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2086 do it for all frames; otherwise do it just for the given frame.
2087 This function must be called when a new frame is created, its size
2088 changes, or its window configuration changes. */
2094 /* Block input so that expose events and other events that access
2095 glyph matrices are not processed while we are changing them. */
2099 adjust_frame_glyphs (f
);
2102 Lisp_Object tail
, lisp_frame
;
2104 FOR_EACH_FRAME (tail
, lisp_frame
)
2105 adjust_frame_glyphs (XFRAME (lisp_frame
));
2112 /* Adjust frame glyphs when Emacs is initialized.
2114 To be called from init_display.
2116 We need a glyph matrix because redraw will happen soon.
2117 Unfortunately, window sizes on selected_frame are not yet set to
2118 meaningful values. I believe we can assume that there are only two
2119 windows on the frame---the mini-buffer and the root window. Frame
2120 height and width seem to be correct so far. So, set the sizes of
2121 windows to estimated values. */
2124 adjust_frame_glyphs_initially ()
2126 struct frame
*sf
= SELECTED_FRAME ();
2127 struct window
*root
= XWINDOW (sf
->root_window
);
2128 struct window
*mini
= XWINDOW (root
->next
);
2129 int frame_lines
= FRAME_LINES (sf
);
2130 int frame_cols
= FRAME_COLS (sf
);
2131 int top_margin
= FRAME_TOP_MARGIN (sf
);
2133 /* Do it for the root window. */
2134 XSETFASTINT (root
->top_line
, top_margin
);
2135 XSETFASTINT (root
->total_cols
, frame_cols
);
2136 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2138 /* Do it for the mini-buffer window. */
2139 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2140 XSETFASTINT (mini
->total_cols
, frame_cols
);
2141 set_window_height (root
->next
, 1, 0);
2143 adjust_frame_glyphs (sf
);
2144 glyphs_initialized_initially_p
= 1;
2148 /* Allocate/reallocate glyph matrices of a single frame F. */
2151 adjust_frame_glyphs (f
)
2154 if (FRAME_WINDOW_P (f
))
2155 adjust_frame_glyphs_for_window_redisplay (f
);
2157 adjust_frame_glyphs_for_frame_redisplay (f
);
2159 /* Don't forget the message buffer and the buffer for
2160 decode_mode_spec. */
2161 adjust_frame_message_buffer (f
);
2162 adjust_decode_mode_spec_buffer (f
);
2164 f
->glyphs_initialized_p
= 1;
2167 /* Return 1 if any window in the tree has nonzero window margins. See
2168 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2170 showing_window_margins_p (w
)
2175 if (!NILP (w
->hchild
))
2177 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2180 else if (!NILP (w
->vchild
))
2182 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2185 else if (!NILP (w
->left_margin_cols
)
2186 || !NILP (w
->right_margin_cols
))
2189 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2195 /* In the window tree with root W, build current matrices of leaf
2196 windows from the frame's current matrix. */
2199 fake_current_matrices (window
)
2204 for (; !NILP (window
); window
= w
->next
)
2206 w
= XWINDOW (window
);
2208 if (!NILP (w
->hchild
))
2209 fake_current_matrices (w
->hchild
);
2210 else if (!NILP (w
->vchild
))
2211 fake_current_matrices (w
->vchild
);
2215 struct frame
*f
= XFRAME (w
->frame
);
2216 struct glyph_matrix
*m
= w
->current_matrix
;
2217 struct glyph_matrix
*fm
= f
->current_matrix
;
2219 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2220 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2222 for (i
= 0; i
< m
->matrix_h
; ++i
)
2224 struct glyph_row
*r
= m
->rows
+ i
;
2225 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2227 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2228 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2230 r
->enabled_p
= fr
->enabled_p
;
2233 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2234 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2235 r
->used
[TEXT_AREA
] = (m
->matrix_w
2236 - r
->used
[LEFT_MARGIN_AREA
]
2237 - r
->used
[RIGHT_MARGIN_AREA
]);
2246 /* Save away the contents of frame F's current frame matrix. Value is
2247 a glyph matrix holding the contents of F's current frame matrix. */
2249 static struct glyph_matrix
*
2250 save_current_matrix (f
)
2254 struct glyph_matrix
*saved
;
2256 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2257 bzero (saved
, sizeof *saved
);
2258 saved
->nrows
= f
->current_matrix
->nrows
;
2259 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2260 * sizeof *saved
->rows
);
2261 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2263 for (i
= 0; i
< saved
->nrows
; ++i
)
2265 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2266 struct glyph_row
*to
= saved
->rows
+ i
;
2267 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2268 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2269 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2270 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2277 /* Restore the contents of frame F's current frame matrix from SAVED,
2278 and free memory associated with SAVED. */
2281 restore_current_matrix (f
, saved
)
2283 struct glyph_matrix
*saved
;
2287 for (i
= 0; i
< saved
->nrows
; ++i
)
2289 struct glyph_row
*from
= saved
->rows
+ i
;
2290 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2291 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2292 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2293 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2294 xfree (from
->glyphs
[TEXT_AREA
]);
2297 xfree (saved
->rows
);
2303 /* Allocate/reallocate glyph matrices of a single frame F for
2304 frame-based redisplay. */
2307 adjust_frame_glyphs_for_frame_redisplay (f
)
2310 struct dim matrix_dim
;
2312 int window_change_flags
;
2315 if (!FRAME_LIVE_P (f
))
2318 top_window_y
= FRAME_TOP_MARGIN (f
);
2320 /* Allocate glyph pool structures if not already done. */
2321 if (f
->desired_pool
== NULL
)
2323 f
->desired_pool
= new_glyph_pool ();
2324 f
->current_pool
= new_glyph_pool ();
2327 /* Allocate frames matrix structures if needed. */
2328 if (f
->desired_matrix
== NULL
)
2330 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2331 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2334 /* Compute window glyph matrices. (This takes the mini-buffer
2335 window into account). The result is the size of the frame glyph
2336 matrix needed. The variable window_change_flags is set to a bit
2337 mask indicating whether new matrices will be allocated or
2338 existing matrices change their size or location within the frame
2340 window_change_flags
= 0;
2342 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2345 &window_change_flags
);
2347 /* Add in menu bar lines, if any. */
2348 matrix_dim
.height
+= top_window_y
;
2350 /* Enlarge pools as necessary. */
2351 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2352 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2354 /* Set up glyph pointers within window matrices. Do this only if
2355 absolutely necessary since it requires a frame redraw. */
2356 if (pool_changed_p
|| window_change_flags
)
2358 /* Do it for window matrices. */
2359 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2361 &window_change_flags
);
2363 /* Size of frame matrices must equal size of frame. Note
2364 that we are called for X frames with window widths NOT equal
2365 to the frame width (from CHANGE_FRAME_SIZE_1). */
2366 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2367 && matrix_dim
.height
== FRAME_LINES (f
));
2369 /* Pointers to glyph memory in glyph rows are exchanged during
2370 the update phase of redisplay, which means in general that a
2371 frame's current matrix consists of pointers into both the
2372 desired and current glyph pool of the frame. Adjusting a
2373 matrix sets the frame matrix up so that pointers are all into
2374 the same pool. If we want to preserve glyph contents of the
2375 current matrix over a call to adjust_glyph_matrix, we must
2376 make a copy of the current glyphs, and restore the current
2377 matrix' contents from that copy. */
2378 if (display_completed
2379 && !FRAME_GARBAGED_P (f
)
2380 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2381 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2382 /* For some reason, the frame glyph matrix gets corrupted if
2383 any of the windows contain margins. I haven't been able
2384 to hunt down the reason, but for the moment this prevents
2385 the problem from manifesting. -- cyd */
2386 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2388 struct glyph_matrix
*copy
= save_current_matrix (f
);
2389 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2390 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2391 restore_current_matrix (f
, copy
);
2392 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2396 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2397 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2398 SET_FRAME_GARBAGED (f
);
2404 /* Allocate/reallocate glyph matrices of a single frame F for
2405 window-based redisplay. */
2408 adjust_frame_glyphs_for_window_redisplay (f
)
2413 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2415 /* Allocate/reallocate window matrices. */
2416 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2418 #ifdef HAVE_X_WINDOWS
2419 /* Allocate/ reallocate matrices of the dummy window used to display
2420 the menu bar under X when no X toolkit support is available. */
2421 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2423 /* Allocate a dummy window if not already done. */
2424 if (NILP (f
->menu_bar_window
))
2426 f
->menu_bar_window
= make_window ();
2427 w
= XWINDOW (f
->menu_bar_window
);
2428 XSETFRAME (w
->frame
, f
);
2429 w
->pseudo_window_p
= 1;
2432 w
= XWINDOW (f
->menu_bar_window
);
2434 /* Set window dimensions to frame dimensions and allocate or
2435 adjust glyph matrices of W. */
2436 XSETFASTINT (w
->top_line
, 0);
2437 XSETFASTINT (w
->left_col
, 0);
2438 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2439 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2440 allocate_matrices_for_window_redisplay (w
);
2442 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2443 #endif /* HAVE_X_WINDOWS */
2446 /* Allocate/ reallocate matrices of the tool bar window. If we
2447 don't have a tool bar window yet, make one. */
2448 if (NILP (f
->tool_bar_window
))
2450 f
->tool_bar_window
= make_window ();
2451 w
= XWINDOW (f
->tool_bar_window
);
2452 XSETFRAME (w
->frame
, f
);
2453 w
->pseudo_window_p
= 1;
2456 w
= XWINDOW (f
->tool_bar_window
);
2458 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2459 XSETFASTINT (w
->left_col
, 0);
2460 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2461 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2462 allocate_matrices_for_window_redisplay (w
);
2467 /* Adjust/ allocate message buffer of frame F.
2469 Note that the message buffer is never freed. Since I could not
2470 find a free in 19.34, I assume that freeing it would be
2471 problematic in some way and don't do it either.
2473 (Implementation note: It should be checked if we can free it
2474 eventually without causing trouble). */
2477 adjust_frame_message_buffer (f
)
2480 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2482 if (FRAME_MESSAGE_BUF (f
))
2484 char *buffer
= FRAME_MESSAGE_BUF (f
);
2485 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2486 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2489 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2493 /* Re-allocate buffer for decode_mode_spec on frame F. */
2496 adjust_decode_mode_spec_buffer (f
)
2499 f
->decode_mode_spec_buffer
2500 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2501 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2506 /**********************************************************************
2507 Freeing Glyph Matrices
2508 **********************************************************************/
2510 /* Free glyph memory for a frame F. F may be null. This function can
2511 be called for the same frame more than once. The root window of
2512 F may be nil when this function is called. This is the case when
2513 the function is called when F is destroyed. */
2519 if (f
&& f
->glyphs_initialized_p
)
2521 /* Block interrupt input so that we don't get surprised by an X
2522 event while we're in an inconsistent state. */
2524 f
->glyphs_initialized_p
= 0;
2526 /* Release window sub-matrices. */
2527 if (!NILP (f
->root_window
))
2528 free_window_matrices (XWINDOW (f
->root_window
));
2530 /* Free the dummy window for menu bars without X toolkit and its
2532 if (!NILP (f
->menu_bar_window
))
2534 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2535 free_glyph_matrix (w
->desired_matrix
);
2536 free_glyph_matrix (w
->current_matrix
);
2537 w
->desired_matrix
= w
->current_matrix
= NULL
;
2538 f
->menu_bar_window
= Qnil
;
2541 /* Free the tool bar window and its glyph matrices. */
2542 if (!NILP (f
->tool_bar_window
))
2544 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2545 free_glyph_matrix (w
->desired_matrix
);
2546 free_glyph_matrix (w
->current_matrix
);
2547 w
->desired_matrix
= w
->current_matrix
= NULL
;
2548 f
->tool_bar_window
= Qnil
;
2551 /* Release frame glyph matrices. Reset fields to zero in
2552 case we are called a second time. */
2553 if (f
->desired_matrix
)
2555 free_glyph_matrix (f
->desired_matrix
);
2556 free_glyph_matrix (f
->current_matrix
);
2557 f
->desired_matrix
= f
->current_matrix
= NULL
;
2560 /* Release glyph pools. */
2561 if (f
->desired_pool
)
2563 free_glyph_pool (f
->desired_pool
);
2564 free_glyph_pool (f
->current_pool
);
2565 f
->desired_pool
= f
->current_pool
= NULL
;
2573 /* Free glyph sub-matrices in the window tree rooted at W. This
2574 function may be called with a null pointer, and it may be called on
2575 the same tree more than once. */
2578 free_window_matrices (w
)
2583 if (!NILP (w
->hchild
))
2584 free_window_matrices (XWINDOW (w
->hchild
));
2585 else if (!NILP (w
->vchild
))
2586 free_window_matrices (XWINDOW (w
->vchild
));
2589 /* This is a leaf window. Free its memory and reset fields
2590 to zero in case this function is called a second time for
2592 free_glyph_matrix (w
->current_matrix
);
2593 free_glyph_matrix (w
->desired_matrix
);
2594 w
->current_matrix
= w
->desired_matrix
= NULL
;
2597 /* Next window on same level. */
2598 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2603 /* Check glyph memory leaks. This function is called from
2604 shut_down_emacs. Note that frames are not destroyed when Emacs
2605 exits. We therefore free all glyph memory for all active frames
2606 explicitly and check that nothing is left allocated. */
2609 check_glyph_memory ()
2611 Lisp_Object tail
, frame
;
2613 /* Free glyph memory for all frames. */
2614 FOR_EACH_FRAME (tail
, frame
)
2615 free_glyphs (XFRAME (frame
));
2617 /* Check that nothing is left allocated. */
2618 if (glyph_matrix_count
)
2620 if (glyph_pool_count
)
2626 /**********************************************************************
2627 Building a Frame Matrix
2628 **********************************************************************/
2630 /* Most of the redisplay code works on glyph matrices attached to
2631 windows. This is a good solution most of the time, but it is not
2632 suitable for terminal code. Terminal output functions cannot rely
2633 on being able to set an arbitrary terminal window. Instead they
2634 must be provided with a view of the whole frame, i.e. the whole
2635 screen. We build such a view by constructing a frame matrix from
2636 window matrices in this section.
2638 Windows that must be updated have their must_be_update_p flag set.
2639 For all such windows, their desired matrix is made part of the
2640 desired frame matrix. For other windows, their current matrix is
2641 made part of the desired frame matrix.
2643 +-----------------+----------------+
2644 | desired | desired |
2646 +-----------------+----------------+
2649 +----------------------------------+
2651 Desired window matrices can be made part of the frame matrix in a
2652 cheap way: We exploit the fact that the desired frame matrix and
2653 desired window matrices share their glyph memory. This is not
2654 possible for current window matrices. Their glyphs are copied to
2655 the desired frame matrix. The latter is equivalent to
2656 preserve_other_columns in the old redisplay.
2658 Used glyphs counters for frame matrix rows are the result of adding
2659 up glyph lengths of the window matrices. A line in the frame
2660 matrix is enabled, if a corresponding line in a window matrix is
2663 After building the desired frame matrix, it will be passed to
2664 terminal code, which will manipulate both the desired and current
2665 frame matrix. Changes applied to the frame's current matrix have
2666 to be visible in current window matrices afterwards, of course.
2668 This problem is solved like this:
2670 1. Window and frame matrices share glyphs. Window matrices are
2671 constructed in a way that their glyph contents ARE the glyph
2672 contents needed in a frame matrix. Thus, any modification of
2673 glyphs done in terminal code will be reflected in window matrices
2676 2. Exchanges of rows in a frame matrix done by terminal code are
2677 intercepted by hook functions so that corresponding row operations
2678 on window matrices can be performed. This is necessary because we
2679 use pointers to glyphs in glyph row structures. To satisfy the
2680 assumption of point 1 above that glyphs are updated implicitly in
2681 window matrices when they are manipulated via the frame matrix,
2682 window and frame matrix must of course agree where to find the
2683 glyphs for their rows. Possible manipulations that must be
2684 mirrored are assignments of rows of the desired frame matrix to the
2685 current frame matrix and scrolling the current frame matrix. */
2687 /* Build frame F's desired matrix from window matrices. Only windows
2688 which have the flag must_be_updated_p set have to be updated. Menu
2689 bar lines of a frame are not covered by window matrices, so make
2690 sure not to touch them in this function. */
2693 build_frame_matrix (f
)
2698 /* F must have a frame matrix when this function is called. */
2699 xassert (!FRAME_WINDOW_P (f
));
2701 /* Clear all rows in the frame matrix covered by window matrices.
2702 Menu bar lines are not covered by windows. */
2703 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2704 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2706 /* Build the matrix by walking the window tree. */
2707 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2708 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2712 /* Walk a window tree, building a frame matrix MATRIX from window
2713 matrices. W is the root of a window tree. */
2716 build_frame_matrix_from_window_tree (matrix
, w
)
2717 struct glyph_matrix
*matrix
;
2722 if (!NILP (w
->hchild
))
2723 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2724 else if (!NILP (w
->vchild
))
2725 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2727 build_frame_matrix_from_leaf_window (matrix
, w
);
2729 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2734 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2735 desired frame matrix built. W is a leaf window whose desired or
2736 current matrix is to be added to FRAME_MATRIX. W's flag
2737 must_be_updated_p determines which matrix it contributes to
2738 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2739 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2740 Adding a desired matrix means setting up used counters and such in
2741 frame rows, while adding a current window matrix to FRAME_MATRIX
2742 means copying glyphs. The latter case corresponds to
2743 preserve_other_columns in the old redisplay. */
2746 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2747 struct glyph_matrix
*frame_matrix
;
2750 struct glyph_matrix
*window_matrix
;
2751 int window_y
, frame_y
;
2752 /* If non-zero, a glyph to insert at the right border of W. */
2753 GLYPH right_border_glyph
;
2755 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2757 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2758 if (w
->must_be_updated_p
)
2760 window_matrix
= w
->desired_matrix
;
2762 /* Decide whether we want to add a vertical border glyph. */
2763 if (!WINDOW_RIGHTMOST_P (w
))
2765 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2768 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2770 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2771 && GLYPH_CODE_CHAR_VALID_P (gc
))
2773 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2774 spec_glyph_lookup_face (w
, &right_border_glyph
);
2777 if (GLYPH_FACE (right_border_glyph
) <= 0)
2778 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2782 window_matrix
= w
->current_matrix
;
2784 /* For all rows in the window matrix and corresponding rows in the
2787 frame_y
= window_matrix
->matrix_y
;
2788 while (window_y
< window_matrix
->nrows
)
2790 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2791 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2792 int current_row_p
= window_matrix
== w
->current_matrix
;
2794 /* Fill up the frame row with spaces up to the left margin of the
2796 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2798 /* Fill up areas in the window matrix row with spaces. */
2799 fill_up_glyph_row_with_spaces (window_row
);
2801 /* If only part of W's desired matrix has been built, and
2802 window_row wasn't displayed, use the corresponding current
2804 if (window_matrix
== w
->desired_matrix
2805 && !window_row
->enabled_p
)
2807 window_row
= w
->current_matrix
->rows
+ window_y
;
2813 /* Copy window row to frame row. */
2814 bcopy (window_row
->glyphs
[0],
2815 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2816 window_matrix
->matrix_w
* sizeof (struct glyph
));
2820 xassert (window_row
->enabled_p
);
2822 /* Only when a desired row has been displayed, we want
2823 the corresponding frame row to be updated. */
2824 frame_row
->enabled_p
= 1;
2826 /* Maybe insert a vertical border between horizontally adjacent
2828 if (GLYPH_CHAR (right_border_glyph
) != 0)
2830 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2831 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2835 /* Window row window_y must be a slice of frame row
2837 xassert (glyph_row_slice_p (window_row
, frame_row
));
2839 /* If rows are in sync, we don't have to copy glyphs because
2840 frame and window share glyphs. */
2842 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2843 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2847 /* Set number of used glyphs in the frame matrix. Since we fill
2848 up with spaces, and visit leaf windows from left to right it
2849 can be done simply. */
2850 frame_row
->used
[TEXT_AREA
]
2851 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2859 /* Given a user-specified glyph, possibly including a Lisp-level face
2860 ID, return a glyph that has a realized face ID.
2861 This is used for glyphs displayed specially and not part of the text;
2862 for instance, vertical separators, truncation markers, etc. */
2865 spec_glyph_lookup_face (w
, glyph
)
2869 int lface_id
= GLYPH_FACE (*glyph
);
2870 /* Convert the glyph's specified face to a realized (cache) face. */
2873 int face_id
= merge_faces (XFRAME (w
->frame
),
2874 Qt
, lface_id
, DEFAULT_FACE_ID
);
2875 SET_GLYPH_FACE (*glyph
, face_id
);
2879 /* Add spaces to a glyph row ROW in a window matrix.
2881 Each row has the form:
2883 +---------+-----------------------------+------------+
2884 | left | text | right |
2885 +---------+-----------------------------+------------+
2887 Left and right marginal areas are optional. This function adds
2888 spaces to areas so that there are no empty holes between areas.
2889 In other words: If the right area is not empty, the text area
2890 is filled up with spaces up to the right area. If the text area
2891 is not empty, the left area is filled up.
2893 To be called for frame-based redisplay, only. */
2896 fill_up_glyph_row_with_spaces (row
)
2897 struct glyph_row
*row
;
2899 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2900 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2901 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2905 /* Fill area AREA of glyph row ROW with spaces. To be called for
2906 frame-based redisplay only. */
2909 fill_up_glyph_row_area_with_spaces (row
, area
)
2910 struct glyph_row
*row
;
2913 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2915 struct glyph
*end
= row
->glyphs
[area
+ 1];
2916 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2919 *text
++ = space_glyph
;
2920 row
->used
[area
] = text
- row
->glyphs
[area
];
2925 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2926 reached. In frame matrices only one area, TEXT_AREA, is used. */
2929 fill_up_frame_row_with_spaces (row
, upto
)
2930 struct glyph_row
*row
;
2933 int i
= row
->used
[TEXT_AREA
];
2934 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2937 glyph
[i
++] = space_glyph
;
2939 row
->used
[TEXT_AREA
] = i
;
2944 /**********************************************************************
2945 Mirroring operations on frame matrices in window matrices
2946 **********************************************************************/
2948 /* Set frame being updated via frame-based redisplay to F. This
2949 function must be called before updates to make explicit that we are
2950 working on frame matrices or not. */
2953 set_frame_matrix_frame (f
)
2956 frame_matrix_frame
= f
;
2960 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2961 DESIRED_MATRIX is the desired matrix corresponding to
2962 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2963 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2964 frame_matrix_frame is non-null, this indicates that the exchange is
2965 done in frame matrices, and that we have to perform analogous
2966 operations in window matrices of frame_matrix_frame. */
2969 make_current (desired_matrix
, current_matrix
, row
)
2970 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2973 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2974 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2975 int mouse_face_p
= current_row
->mouse_face_p
;
2977 /* Do current_row = desired_row. This exchanges glyph pointers
2978 between both rows, and does a structure assignment otherwise. */
2979 assign_row (current_row
, desired_row
);
2981 /* Enable current_row to mark it as valid. */
2982 current_row
->enabled_p
= 1;
2983 current_row
->mouse_face_p
= mouse_face_p
;
2985 /* If we are called on frame matrices, perform analogous operations
2986 for window matrices. */
2987 if (frame_matrix_frame
)
2988 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2992 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2993 W's frame which has been made current (by swapping pointers between
2994 current and desired matrix). Perform analogous operations in the
2995 matrices of leaf windows in the window tree rooted at W. */
2998 mirror_make_current (w
, frame_row
)
3004 if (!NILP (w
->hchild
))
3005 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
3006 else if (!NILP (w
->vchild
))
3007 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3010 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3011 here because the checks performed in debug mode there
3012 will not allow the conversion. */
3013 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3015 /* If FRAME_ROW is within W, assign the desired row to the
3016 current row (exchanging glyph pointers). */
3017 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3019 struct glyph_row
*current_row
3020 = MATRIX_ROW (w
->current_matrix
, row
);
3021 struct glyph_row
*desired_row
3022 = MATRIX_ROW (w
->desired_matrix
, row
);
3024 if (desired_row
->enabled_p
)
3025 assign_row (current_row
, desired_row
);
3027 swap_glyph_pointers (desired_row
, current_row
);
3028 current_row
->enabled_p
= 1;
3032 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3037 /* Perform row dance after scrolling. We are working on the range of
3038 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3039 including) in MATRIX. COPY_FROM is a vector containing, for each
3040 row I in the range 0 <= I < NLINES, the index of the original line
3041 to move to I. This index is relative to the row range, i.e. 0 <=
3042 index < NLINES. RETAINED_P is a vector containing zero for each
3043 row 0 <= I < NLINES which is empty.
3045 This function is called from do_scrolling and do_direct_scrolling. */
3048 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3050 struct glyph_matrix
*matrix
;
3051 int unchanged_at_top
, nlines
;
3055 /* A copy of original rows. */
3056 struct glyph_row
*old_rows
;
3058 /* Rows to assign to. */
3059 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3063 /* Make a copy of the original rows. */
3064 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3065 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3067 /* Assign new rows, maybe clear lines. */
3068 for (i
= 0; i
< nlines
; ++i
)
3070 int enabled_before_p
= new_rows
[i
].enabled_p
;
3072 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3073 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3074 new_rows
[i
] = old_rows
[copy_from
[i
]];
3075 new_rows
[i
].enabled_p
= enabled_before_p
;
3077 /* RETAINED_P is zero for empty lines. */
3078 if (!retained_p
[copy_from
[i
]])
3079 new_rows
[i
].enabled_p
= 0;
3082 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3083 if (frame_matrix_frame
)
3084 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3085 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3089 /* Synchronize glyph pointers in the current matrix of window W with
3090 the current frame matrix. */
3093 sync_window_with_frame_matrix_rows (w
)
3096 struct frame
*f
= XFRAME (w
->frame
);
3097 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3098 int left
, right
, x
, width
;
3100 /* Preconditions: W must be a leaf window on a tty frame. */
3101 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3102 xassert (!FRAME_WINDOW_P (f
));
3104 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3105 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3106 x
= w
->current_matrix
->matrix_x
;
3107 width
= w
->current_matrix
->matrix_w
;
3109 window_row
= w
->current_matrix
->rows
;
3110 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3111 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3113 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3115 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3116 = frame_row
->glyphs
[0] + x
;
3117 window_row
->glyphs
[TEXT_AREA
]
3118 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3119 window_row
->glyphs
[LAST_AREA
]
3120 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3121 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3122 = window_row
->glyphs
[LAST_AREA
] - right
;
3127 /* Return the window in the window tree rooted in W containing frame
3128 row ROW. Value is null if none is found. */
3131 frame_row_to_window (w
, row
)
3135 struct window
*found
= NULL
;
3139 if (!NILP (w
->hchild
))
3140 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3141 else if (!NILP (w
->vchild
))
3142 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3143 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3144 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3147 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3154 /* Perform a line dance in the window tree rooted at W, after
3155 scrolling a frame matrix in mirrored_line_dance.
3157 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3158 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3159 COPY_FROM is a vector containing, for each row I in the range 0 <=
3160 I < NLINES, the index of the original line to move to I. This
3161 index is relative to the row range, i.e. 0 <= index < NLINES.
3162 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3166 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3168 int unchanged_at_top
, nlines
;
3174 if (!NILP (w
->hchild
))
3175 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3176 nlines
, copy_from
, retained_p
);
3177 else if (!NILP (w
->vchild
))
3178 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3179 nlines
, copy_from
, retained_p
);
3182 /* W is a leaf window, and we are working on its current
3184 struct glyph_matrix
*m
= w
->current_matrix
;
3186 struct glyph_row
*old_rows
;
3188 /* Make a copy of the original rows of matrix m. */
3189 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3190 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3192 for (i
= 0; i
< nlines
; ++i
)
3194 /* Frame relative line assigned to. */
3195 int frame_to
= i
+ unchanged_at_top
;
3197 /* Frame relative line assigned. */
3198 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3200 /* Window relative line assigned to. */
3201 int window_to
= frame_to
- m
->matrix_y
;
3203 /* Window relative line assigned. */
3204 int window_from
= frame_from
- m
->matrix_y
;
3206 /* Is assigned line inside window? */
3207 int from_inside_window_p
3208 = window_from
>= 0 && window_from
< m
->matrix_h
;
3210 /* Is assigned to line inside window? */
3211 int to_inside_window_p
3212 = window_to
>= 0 && window_to
< m
->matrix_h
;
3214 if (from_inside_window_p
&& to_inside_window_p
)
3216 /* Enabled setting before assignment. */
3217 int enabled_before_p
;
3219 /* Do the assignment. The enabled_p flag is saved
3220 over the assignment because the old redisplay did
3222 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3223 m
->rows
[window_to
] = old_rows
[window_from
];
3224 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3226 /* If frame line is empty, window line is empty, too. */
3227 if (!retained_p
[copy_from
[i
]])
3228 m
->rows
[window_to
].enabled_p
= 0;
3230 else if (to_inside_window_p
)
3232 /* A copy between windows. This is an infrequent
3233 case not worth optimizing. */
3234 struct frame
*f
= XFRAME (w
->frame
);
3235 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3237 struct glyph_matrix
*m2
;
3240 w2
= frame_row_to_window (root
, frame_from
);
3241 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3242 -nw', FROM_FRAME sometimes has no associated window.
3243 This check avoids a segfault if W2 is null. */
3246 m2
= w2
->current_matrix
;
3247 m2_from
= frame_from
- m2
->matrix_y
;
3248 copy_row_except_pointers (m
->rows
+ window_to
,
3249 m2
->rows
+ m2_from
);
3251 /* If frame line is empty, window line is empty, too. */
3252 if (!retained_p
[copy_from
[i
]])
3253 m
->rows
[window_to
].enabled_p
= 0;
3257 else if (from_inside_window_p
)
3261 /* If there was a copy between windows, make sure glyph
3262 pointers are in sync with the frame matrix. */
3264 sync_window_with_frame_matrix_rows (w
);
3266 /* Check that no pointers are lost. */
3270 /* Next window on same level. */
3271 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3278 /* Check that window and frame matrices agree about their
3279 understanding where glyphs of the rows are to find. For each
3280 window in the window tree rooted at W, check that rows in the
3281 matrices of leaf window agree with their frame matrices about
3285 check_window_matrix_pointers (w
)
3290 if (!NILP (w
->hchild
))
3291 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3292 else if (!NILP (w
->vchild
))
3293 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3296 struct frame
*f
= XFRAME (w
->frame
);
3297 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3298 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3301 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3306 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3307 a window and FRAME_MATRIX is the corresponding frame matrix. For
3308 each row in WINDOW_MATRIX check that it's a slice of the
3309 corresponding frame row. If it isn't, abort. */
3312 check_matrix_pointers (window_matrix
, frame_matrix
)
3313 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3315 /* Row number in WINDOW_MATRIX. */
3318 /* Row number corresponding to I in FRAME_MATRIX. */
3319 int j
= window_matrix
->matrix_y
;
3321 /* For all rows check that the row in the window matrix is a
3322 slice of the row in the frame matrix. If it isn't we didn't
3323 mirror an operation on the frame matrix correctly. */
3324 while (i
< window_matrix
->nrows
)
3326 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3327 frame_matrix
->rows
+ j
))
3333 #endif /* GLYPH_DEBUG != 0 */
3337 /**********************************************************************
3338 VPOS and HPOS translations
3339 **********************************************************************/
3343 /* Translate vertical position VPOS which is relative to window W to a
3344 vertical position relative to W's frame. */
3347 window_to_frame_vpos (w
, vpos
)
3351 struct frame
*f
= XFRAME (w
->frame
);
3353 xassert (!FRAME_WINDOW_P (f
));
3354 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3355 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3356 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3361 /* Translate horizontal position HPOS which is relative to window W to
3362 a horizontal position relative to W's frame. */
3365 window_to_frame_hpos (w
, hpos
)
3369 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3370 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3374 #endif /* GLYPH_DEBUG */
3378 /**********************************************************************
3380 **********************************************************************/
3382 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3383 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3389 CHECK_LIVE_FRAME (frame
);
3392 /* Ignore redraw requests, if frame has no glyphs yet.
3393 (Implementation note: It still has to be checked why we are
3394 called so early here). */
3395 if (!glyphs_initialized_initially_p
)
3400 if (FRAME_MSDOS_P (f
))
3401 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3404 clear_current_matrices (f
);
3406 if (FRAME_TERMCAP_P (f
))
3407 fflush (FRAME_TTY (f
)->output
);
3408 windows_or_buffers_changed
++;
3409 /* Mark all windows as inaccurate, so that every window will have
3410 its redisplay done. */
3411 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3412 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3418 /* Redraw frame F. This is nothing more than a call to the Lisp
3419 function redraw-frame. */
3426 XSETFRAME (frame
, f
);
3427 Fredraw_frame (frame
);
3431 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3432 doc
: /* Clear and redisplay all visible frames. */)
3435 Lisp_Object tail
, frame
;
3437 FOR_EACH_FRAME (tail
, frame
)
3438 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3439 Fredraw_frame (frame
);
3445 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3446 visible frames marked as garbaged. */
3449 redraw_garbaged_frames ()
3451 Lisp_Object tail
, frame
;
3453 FOR_EACH_FRAME (tail
, frame
)
3454 if (FRAME_VISIBLE_P (XFRAME (frame
))
3455 && FRAME_GARBAGED_P (XFRAME (frame
)))
3456 Fredraw_frame (frame
);
3461 /***********************************************************************
3463 ***********************************************************************/
3465 /* Update frame F based on the data in desired matrices.
3467 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3468 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3471 Value is non-zero if redisplay was stopped due to pending input. */
3474 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3477 int inhibit_hairy_id_p
;
3479 /* 1 means display has been paused because of pending input. */
3481 struct window
*root_window
= XWINDOW (f
->root_window
);
3483 if (redisplay_dont_pause
)
3485 #if PERIODIC_PREEMPTION_CHECKING
3486 else if (NILP (Vredisplay_preemption_period
))
3488 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3491 double p
= XFLOATINT (Vredisplay_preemption_period
);
3494 if (detect_input_pending_ignore_squeezables ())
3501 usec
= (p
- sec
) * 1000000;
3503 EMACS_GET_TIME (tm
);
3504 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3505 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3509 if (FRAME_WINDOW_P (f
))
3511 /* We are working on window matrix basis. All windows whose
3512 flag must_be_updated_p is set have to be updated. */
3514 /* Record that we are not working on frame matrices. */
3515 set_frame_matrix_frame (NULL
);
3517 /* Update all windows in the window tree of F, maybe stopping
3518 when pending input is detected. */
3521 /* Update the menu bar on X frames that don't have toolkit
3523 if (WINDOWP (f
->menu_bar_window
))
3524 update_window (XWINDOW (f
->menu_bar_window
), 1);
3526 /* Update the tool-bar window, if present. */
3527 if (WINDOWP (f
->tool_bar_window
))
3529 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3531 /* Update tool-bar window. */
3532 if (w
->must_be_updated_p
)
3536 update_window (w
, 1);
3537 w
->must_be_updated_p
= 0;
3539 /* Swap tool-bar strings. We swap because we want to
3541 tem
= f
->current_tool_bar_string
;
3542 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3543 f
->desired_tool_bar_string
= tem
;
3548 /* Update windows. */
3549 paused_p
= update_window_tree (root_window
, force_p
);
3552 /* This flush is a performance bottleneck under X,
3553 and it doesn't seem to be necessary anyway (in general).
3554 It is necessary when resizing the window with the mouse, or
3555 at least the fringes are not redrawn in a timely manner. ++kfs */
3556 if (f
->force_flush_display_p
)
3558 FRAME_RIF (f
)->flush_display (f
);
3559 f
->force_flush_display_p
= 0;
3564 /* We are working on frame matrix basis. Set the frame on whose
3565 frame matrix we operate. */
3566 set_frame_matrix_frame (f
);
3568 /* Build F's desired matrix from window matrices. */
3569 build_frame_matrix (f
);
3571 /* Update the display */
3573 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3576 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3578 if (FRAME_TTY (f
)->termscript
)
3579 fflush (FRAME_TTY (f
)->termscript
);
3580 if (FRAME_TERMCAP_P (f
))
3581 fflush (FRAME_TTY (f
)->output
);
3584 /* Check window matrices for lost pointers. */
3586 check_window_matrix_pointers (root_window
);
3587 add_frame_display_history (f
, paused_p
);
3592 /* Reset flags indicating that a window should be updated. */
3593 set_window_update_flags (root_window
, 0);
3595 display_completed
= !paused_p
;
3601 /************************************************************************
3602 Window-based updates
3603 ************************************************************************/
3605 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3606 don't stop updating when input is pending. */
3609 update_window_tree (w
, force_p
)
3615 while (w
&& !paused_p
)
3617 if (!NILP (w
->hchild
))
3618 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3619 else if (!NILP (w
->vchild
))
3620 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3621 else if (w
->must_be_updated_p
)
3622 paused_p
|= update_window (w
, force_p
);
3624 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3631 /* Update window W if its flag must_be_updated_p is non-zero. If
3632 FORCE_P is non-zero, don't stop updating if input is pending. */
3635 update_single_window (w
, force_p
)
3639 if (w
->must_be_updated_p
)
3641 printf("window %d must be updated\n");
3642 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3644 /* Record that this is not a frame-based redisplay. */
3645 set_frame_matrix_frame (NULL
);
3647 if (redisplay_dont_pause
)
3649 #if PERIODIC_PREEMPTION_CHECKING
3650 else if (NILP (Vredisplay_preemption_period
))
3652 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3655 double p
= XFLOATINT (Vredisplay_preemption_period
);
3659 usec
= (p
- sec
) * 1000000;
3661 EMACS_GET_TIME (tm
);
3662 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3663 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3669 update_window (w
, force_p
);
3672 /* Reset flag in W. */
3673 w
->must_be_updated_p
= 0;
3677 #ifdef HAVE_WINDOW_SYSTEM
3679 /* Redraw lines from the current matrix of window W that are
3680 overlapped by other rows. YB is bottom-most y-position in W. */
3683 redraw_overlapped_rows (w
, yb
)
3688 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3690 /* If rows overlapping others have been changed, the rows being
3691 overlapped have to be redrawn. This won't draw lines that have
3692 already been drawn in update_window_line because overlapped_p in
3693 desired rows is 0, so after row assignment overlapped_p in
3694 current rows is 0. */
3695 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3697 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3699 if (!row
->enabled_p
)
3701 else if (row
->mode_line_p
)
3704 if (row
->overlapped_p
)
3706 enum glyph_row_area area
;
3708 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3711 updated_area
= area
;
3712 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3713 area
== TEXT_AREA
? row
->x
: 0);
3714 if (row
->used
[area
])
3715 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3717 FRAME_RIF (f
)->clear_end_of_line (-1);
3720 row
->overlapped_p
= 0;
3723 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3729 /* Redraw lines from the current matrix of window W that overlap
3730 others. YB is bottom-most y-position in W. */
3733 redraw_overlapping_rows (w
, yb
)
3738 struct glyph_row
*row
;
3739 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3741 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3743 row
= w
->current_matrix
->rows
+ i
;
3745 if (!row
->enabled_p
)
3747 else if (row
->mode_line_p
)
3750 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3752 if (row
->overlapping_p
)
3756 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3757 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3758 overlaps
|= OVERLAPS_PRED
;
3759 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3760 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3761 overlaps
|= OVERLAPS_SUCC
;
3765 if (row
->used
[LEFT_MARGIN_AREA
])
3766 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3768 if (row
->used
[TEXT_AREA
])
3769 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3771 if (row
->used
[RIGHT_MARGIN_AREA
])
3772 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3774 /* Record in neighbour rows that ROW overwrites part of
3776 if (overlaps
& OVERLAPS_PRED
)
3777 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3778 if (overlaps
& OVERLAPS_SUCC
)
3779 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3788 #endif /* HAVE_WINDOW_SYSTEM */
3793 /* Check that no row in the current matrix of window W is enabled
3794 which is below what's displayed in the window. */
3797 check_current_matrix_flags (w
)
3800 int last_seen_p
= 0;
3801 int i
, yb
= window_text_bottom_y (w
);
3803 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3805 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3806 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3808 else if (last_seen_p
&& row
->enabled_p
)
3813 #endif /* GLYPH_DEBUG */
3816 /* Update display of window W. FORCE_P non-zero means that we should
3817 not stop when detecting pending input. */
3820 update_window (w
, force_p
)
3824 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3826 #if !PERIODIC_PREEMPTION_CHECKING
3827 int preempt_count
= baud_rate
/ 2400 + 1;
3829 extern int input_pending
;
3830 extern Lisp_Object do_mouse_tracking
;
3831 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3833 /* Check that W's frame doesn't have glyph matrices. */
3834 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3837 /* Check pending input the first time so that we can quickly return. */
3838 #if !PERIODIC_PREEMPTION_CHECKING
3840 detect_input_pending_ignore_squeezables ();
3843 /* If forced to complete the update, or if no input is pending, do
3845 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3847 struct glyph_row
*row
, *end
;
3848 struct glyph_row
*mode_line_row
;
3849 struct glyph_row
*header_line_row
;
3850 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3852 rif
->update_window_begin_hook (w
);
3853 yb
= window_text_bottom_y (w
);
3855 /* If window has a header line, update it before everything else.
3856 Adjust y-positions of other rows by the header line height. */
3857 row
= desired_matrix
->rows
;
3858 end
= row
+ desired_matrix
->nrows
- 1;
3860 if (row
->mode_line_p
)
3862 header_line_row
= row
;
3866 header_line_row
= NULL
;
3868 /* Update the mode line, if necessary. */
3869 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3870 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3872 mode_line_row
->y
= yb
;
3873 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3875 &mouse_face_overwritten_p
);
3878 /* Find first enabled row. Optimizations in redisplay_internal
3879 may lead to an update with only one row enabled. There may
3880 be also completely empty matrices. */
3881 while (row
< end
&& !row
->enabled_p
)
3884 /* Try reusing part of the display by copying. */
3885 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3887 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3890 /* All rows were found to be equal. */
3896 /* We've scrolled the display. */
3902 /* Update the rest of the lines. */
3903 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
3906 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3909 /* We'll have to play a little bit with when to
3910 detect_input_pending. If it's done too often,
3911 scrolling large windows with repeated scroll-up
3912 commands will too quickly pause redisplay. */
3913 #if PERIODIC_PREEMPTION_CHECKING
3917 EMACS_GET_TIME (tm
);
3918 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3919 if (EMACS_TIME_NEG_P (dif
))
3921 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3922 if (detect_input_pending_ignore_squeezables ())
3927 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3928 detect_input_pending_ignore_squeezables ();
3930 changed_p
|= update_window_line (w
, vpos
,
3931 &mouse_face_overwritten_p
);
3933 /* Mark all rows below the last visible one in the current
3934 matrix as invalid. This is necessary because of
3935 variable line heights. Consider the case of three
3936 successive redisplays, where the first displays 5
3937 lines, the second 3 lines, and the third 5 lines again.
3938 If the second redisplay wouldn't mark rows in the
3939 current matrix invalid, the third redisplay might be
3940 tempted to optimize redisplay based on lines displayed
3941 in the first redisplay. */
3942 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3943 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3944 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3947 /* Was display preempted? */
3948 paused_p
= row
< end
;
3952 /* Update the header line after scrolling because a new header
3953 line would otherwise overwrite lines at the top of the window
3954 that can be scrolled. */
3955 if (header_line_row
&& header_line_row
->enabled_p
)
3957 header_line_row
->y
= 0;
3958 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3961 /* Fix the appearance of overlapping/overlapped rows. */
3962 if (!paused_p
&& !w
->pseudo_window_p
)
3964 #ifdef HAVE_WINDOW_SYSTEM
3965 if (changed_p
&& rif
->fix_overlapping_area
)
3967 redraw_overlapped_rows (w
, yb
);
3968 redraw_overlapping_rows (w
, yb
);
3972 /* Make cursor visible at cursor position of W. */
3973 set_window_cursor_after_update (w
);
3975 #if 0 /* Check that current matrix invariants are satisfied. This is
3976 for debugging only. See the comment of check_matrix_invariants. */
3977 IF_DEBUG (check_matrix_invariants (w
));
3982 /* Remember the redisplay method used to display the matrix. */
3983 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3986 #ifdef HAVE_WINDOW_SYSTEM
3987 update_window_fringes (w
, 0);
3990 /* End the update of window W. Don't set the cursor if we
3991 paused updating the display because in this case,
3992 set_window_cursor_after_update hasn't been called, and
3993 output_cursor doesn't contain the cursor location. */
3994 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4000 /* check_current_matrix_flags (w); */
4001 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4005 if ((XWINDOW(FRAME_SELECTED_WINDOW (SELECTED_FRAME()))) == (w
))
4006 xwidget_end_redisplay(w
->current_matrix
);
4008 clear_glyph_matrix (desired_matrix
);
4014 /* Update the display of area AREA in window W, row number VPOS.
4015 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4018 update_marginal_area (w
, area
, vpos
)
4022 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4023 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4025 /* Let functions in xterm.c know what area subsequent X positions
4026 will be relative to. */
4027 updated_area
= area
;
4029 /* Set cursor to start of glyphs, write them, and clear to the end
4030 of the area. I don't think that something more sophisticated is
4031 necessary here, since marginal areas will not be the default. */
4032 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4033 if (desired_row
->used
[area
])
4034 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4035 rif
->clear_end_of_line (-1);
4039 /* Update the display of the text area of row VPOS in window W.
4040 Value is non-zero if display has changed. */
4043 update_text_area (w
, vpos
)
4047 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4048 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4049 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4052 /* Let functions in xterm.c know what area subsequent X positions
4053 will be relative to. */
4054 updated_area
= TEXT_AREA
;
4056 /* If rows are at different X or Y, or rows have different height,
4057 or the current row is marked invalid, write the entire line. */
4058 if (!current_row
->enabled_p
4059 || desired_row
->y
!= current_row
->y
4060 || desired_row
->ascent
!= current_row
->ascent
4061 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4062 || desired_row
->phys_height
!= current_row
->phys_height
4063 || desired_row
->visible_height
!= current_row
->visible_height
4064 || current_row
->overlapped_p
4065 /* This next line is necessary for correctly redrawing
4066 mouse-face areas after scrolling and other operations.
4067 However, it causes excessive flickering when mouse is moved
4068 across the mode line. Luckily, turning it off for the mode
4069 line doesn't seem to hurt anything. -- cyd.
4070 But it is still needed for the header line. -- kfs. */
4071 || (current_row
->mouse_face_p
4072 && !(current_row
->mode_line_p
&& vpos
> 0))
4073 || current_row
->x
!= desired_row
->x
)
4075 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4077 if (desired_row
->used
[TEXT_AREA
])
4078 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4079 desired_row
->used
[TEXT_AREA
]);
4081 /* Clear to end of window. */
4082 rif
->clear_end_of_line (-1);
4085 /* This erases the cursor. We do this here because
4086 notice_overwritten_cursor cannot easily check this, which
4087 might indicate that the whole functionality of
4088 notice_overwritten_cursor would better be implemented here.
4089 On the other hand, we need notice_overwritten_cursor as long
4090 as mouse highlighting is done asynchronously outside of
4092 if (vpos
== w
->phys_cursor
.vpos
)
4093 w
->phys_cursor_on_p
= 0;
4098 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4099 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4100 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4101 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4102 int abort_skipping
= 0;
4104 /* If the desired row extends its face to the text area end, and
4105 unless the current row also does so at the same position,
4106 make sure we write at least one glyph, so that the face
4107 extension actually takes place. */
4108 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4109 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4110 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4111 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4114 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4118 /* Loop over glyphs that current and desired row may have
4122 int can_skip_p
= !abort_skipping
;
4124 /* Skip over glyphs that both rows have in common. These
4125 don't have to be written. We can't skip if the last
4126 current glyph overlaps the glyph to its right. For
4127 example, consider a current row of `if ' with the `f' in
4128 Courier bold so that it overlaps the ` ' to its right.
4129 If the desired row is ` ', we would skip over the space
4130 after the `if' and there would remain a pixel from the
4131 `f' on the screen. */
4132 if (overlapping_glyphs_p
&& i
> 0)
4134 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4137 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4139 can_skip_p
= (right
== 0 && !abort_skipping
);
4147 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4149 x
+= desired_glyph
->pixel_width
;
4150 ++desired_glyph
, ++current_glyph
, ++i
;
4153 /* Consider the case that the current row contains "xxx
4154 ppp ggg" in italic Courier font, and the desired row
4155 is "xxx ggg". The character `p' has lbearing, `g'
4156 has not. The loop above will stop in front of the
4157 first `p' in the current row. If we would start
4158 writing glyphs there, we wouldn't erase the lbearing
4159 of the `p'. The rest of the lbearing problem is then
4160 taken care of by draw_glyphs. */
4161 if (overlapping_glyphs_p
4163 && i
< current_row
->used
[TEXT_AREA
]
4164 && (current_row
->used
[TEXT_AREA
]
4165 != desired_row
->used
[TEXT_AREA
]))
4169 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4171 while (left
> 0 && i
> 0)
4173 --i
, --desired_glyph
, --current_glyph
;
4174 x
-= desired_glyph
->pixel_width
;
4175 left
-= desired_glyph
->pixel_width
;
4178 /* Abort the skipping algorithm if we end up before
4179 our starting point, to avoid looping (bug#1070).
4180 This can happen when the lbearing is larger than
4182 abort_skipping
= (i
< start_hpos
);
4186 /* Try to avoid writing the entire rest of the desired row
4187 by looking for a resync point. This mainly prevents
4188 mode line flickering in the case the mode line is in
4189 fixed-pitch font, which it usually will be. */
4190 if (i
< desired_row
->used
[TEXT_AREA
])
4192 int start_x
= x
, start_hpos
= i
;
4193 struct glyph
*start
= desired_glyph
;
4195 int skip_first_p
= !can_skip_p
;
4197 /* Find the next glyph that's equal again. */
4200 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4203 x
+= desired_glyph
->pixel_width
;
4204 current_x
+= current_glyph
->pixel_width
;
4205 ++desired_glyph
, ++current_glyph
, ++i
;
4209 if (i
== start_hpos
|| x
!= current_x
)
4213 desired_glyph
= start
;
4217 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4218 rif
->write_glyphs (start
, i
- start_hpos
);
4223 /* Write the rest. */
4224 if (i
< desired_row
->used
[TEXT_AREA
])
4226 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4227 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4231 /* Maybe clear to end of line. */
4232 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4234 /* If new row extends to the end of the text area, nothing
4235 has to be cleared, if and only if we did a write_glyphs
4236 above. This is made sure by setting desired_stop_pos
4237 appropriately above. */
4238 xassert (i
< desired_row
->used
[TEXT_AREA
]
4239 || ((desired_row
->used
[TEXT_AREA
]
4240 == current_row
->used
[TEXT_AREA
])
4241 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4243 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4245 /* If old row extends to the end of the text area, clear. */
4246 if (i
>= desired_row
->used
[TEXT_AREA
])
4247 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4248 desired_row
->pixel_width
);
4249 rif
->clear_end_of_line (-1);
4252 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4254 /* Otherwise clear to the end of the old row. Everything
4255 after that position should be clear already. */
4258 if (i
>= desired_row
->used
[TEXT_AREA
])
4259 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4260 desired_row
->pixel_width
);
4262 /* If cursor is displayed at the end of the line, make sure
4263 it's cleared. Nowadays we don't have a phys_cursor_glyph
4264 with which to erase the cursor (because this method
4265 doesn't work with lbearing/rbearing), so we must do it
4267 if (vpos
== w
->phys_cursor
.vpos
4268 && (desired_row
->reversed_p
4269 ? (w
->phys_cursor
.hpos
< 0)
4270 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
4272 w
->phys_cursor_on_p
= 0;
4276 x
= current_row
->pixel_width
;
4277 rif
->clear_end_of_line (x
);
4286 /* Update row VPOS in window W. Value is non-zero if display has been
4290 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4292 int vpos
, *mouse_face_overwritten_p
;
4294 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4295 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4296 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4299 /* Set the row being updated. This is important to let xterm.c
4300 know what line height values are in effect. */
4301 updated_row
= desired_row
;
4303 /* A row can be completely invisible in case a desired matrix was
4304 built with a vscroll and then make_cursor_line_fully_visible shifts
4305 the matrix. Make sure to make such rows current anyway, since
4306 we need the correct y-position, for example, in the current matrix. */
4307 if (desired_row
->mode_line_p
4308 || desired_row
->visible_height
> 0)
4310 xassert (desired_row
->enabled_p
);
4312 /* Update display of the left margin area, if there is one. */
4313 if (!desired_row
->full_width_p
4314 && !NILP (w
->left_margin_cols
))
4317 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4320 /* Update the display of the text area. */
4321 if (update_text_area (w
, vpos
))
4324 if (current_row
->mouse_face_p
)
4325 *mouse_face_overwritten_p
= 1;
4328 /* Update display of the right margin area, if there is one. */
4329 if (!desired_row
->full_width_p
4330 && !NILP (w
->right_margin_cols
))
4333 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4336 /* Draw truncation marks etc. */
4337 if (!current_row
->enabled_p
4338 || desired_row
->y
!= current_row
->y
4339 || desired_row
->visible_height
!= current_row
->visible_height
4340 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4341 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4342 || current_row
->redraw_fringe_bitmaps_p
4343 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4344 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4345 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4346 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4347 rif
->after_update_window_line_hook (desired_row
);
4350 /* Update current_row from desired_row. */
4351 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4357 /* Set the cursor after an update of window W. This function may only
4358 be called from update_window. */
4361 set_window_cursor_after_update (w
)
4364 struct frame
*f
= XFRAME (w
->frame
);
4365 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4366 int cx
, cy
, vpos
, hpos
;
4368 /* Not intended for frame matrix updates. */
4369 xassert (FRAME_WINDOW_P (f
));
4371 if (cursor_in_echo_area
4372 && !NILP (echo_area_buffer
[0])
4373 /* If we are showing a message instead of the mini-buffer,
4374 show the cursor for the message instead. */
4375 && XWINDOW (minibuf_window
) == w
4376 && EQ (minibuf_window
, echo_area_window
)
4377 /* These cases apply only to the frame that contains
4378 the active mini-buffer window. */
4379 && FRAME_HAS_MINIBUF_P (f
)
4380 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4382 cx
= cy
= vpos
= hpos
= 0;
4384 if (cursor_in_echo_area
>= 0)
4386 /* If the mini-buffer is several lines high, find the last
4387 line that has any text on it. Note: either all lines
4388 are enabled or none. Otherwise we wouldn't be able to
4390 struct glyph_row
*row
, *last_row
;
4391 struct glyph
*glyph
;
4392 int yb
= window_text_bottom_y (w
);
4395 row
= w
->current_matrix
->rows
;
4396 while (row
->enabled_p
4397 && (last_row
== NULL
4398 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4400 if (row
->used
[TEXT_AREA
]
4401 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4408 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4409 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4411 while (last
> start
&& last
->charpos
< 0)
4414 for (glyph
= start
; glyph
< last
; ++glyph
)
4416 cx
+= glyph
->pixel_width
;
4421 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4429 hpos
= w
->cursor
.hpos
;
4430 vpos
= w
->cursor
.vpos
;
4433 /* Window cursor can be out of sync for horizontally split windows. */
4434 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4435 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4436 vpos
= max (0, vpos
);
4437 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4438 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4442 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4443 tree rooted at W. */
4446 set_window_update_flags (w
, on_p
)
4452 if (!NILP (w
->hchild
))
4453 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4454 else if (!NILP (w
->vchild
))
4455 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4457 w
->must_be_updated_p
= on_p
;
4459 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4465 /***********************************************************************
4466 Window-Based Scrolling
4467 ***********************************************************************/
4469 /* Structure describing rows in scrolling_window. */
4473 /* Number of occurrences of this row in desired and current matrix. */
4474 int old_uses
, new_uses
;
4476 /* Vpos of row in new matrix. */
4477 int new_line_number
;
4479 /* Bucket index of this row_entry in the hash table row_table. */
4482 /* The row described by this entry. */
4483 struct glyph_row
*row
;
4485 /* Hash collision chain. */
4486 struct row_entry
*next
;
4489 /* A pool to allocate row_entry structures from, and the size of the
4490 pool. The pool is reallocated in scrolling_window when we find
4491 that we need a larger one. */
4493 static struct row_entry
*row_entry_pool
;
4494 static int row_entry_pool_size
;
4496 /* Index of next free entry in row_entry_pool. */
4498 static int row_entry_idx
;
4500 /* The hash table used during scrolling, and the table's size. This
4501 table is used to quickly identify equal rows in the desired and
4504 static struct row_entry
**row_table
;
4505 static int row_table_size
;
4507 /* Vectors of pointers to row_entry structures belonging to the
4508 current and desired matrix, and the size of the vectors. */
4510 static struct row_entry
**old_lines
, **new_lines
;
4511 static int old_lines_size
, new_lines_size
;
4513 /* A pool to allocate run structures from, and its size. */
4515 static struct run
*run_pool
;
4516 static int runs_size
;
4518 /* A vector of runs of lines found during scrolling. */
4520 static struct run
**runs
;
4522 /* Add glyph row ROW to the scrolling hash table during the scrolling
4525 static INLINE
struct row_entry
*
4526 add_row_entry (w
, row
)
4528 struct glyph_row
*row
;
4530 struct row_entry
*entry
;
4531 int i
= row
->hash
% row_table_size
;
4533 entry
= row_table
[i
];
4534 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4535 entry
= entry
->next
;
4539 entry
= row_entry_pool
+ row_entry_idx
++;
4541 entry
->old_uses
= entry
->new_uses
= 0;
4542 entry
->new_line_number
= 0;
4544 entry
->next
= row_table
[i
];
4545 row_table
[i
] = entry
;
4552 /* Try to reuse part of the current display of W by scrolling lines.
4553 HEADER_LINE_P non-zero means W has a header line.
4555 The algorithm is taken from Communications of the ACM, Apr78 "A
4556 Technique for Isolating Differences Between Files." It should take
4559 A short outline of the steps of the algorithm
4561 1. Skip lines equal at the start and end of both matrices.
4563 2. Enter rows in the current and desired matrix into a symbol
4564 table, counting how often they appear in both matrices.
4566 3. Rows that appear exactly once in both matrices serve as anchors,
4567 i.e. we assume that such lines are likely to have been moved.
4569 4. Starting from anchor lines, extend regions to be scrolled both
4570 forward and backward.
4574 -1 if all rows were found to be equal.
4575 0 to indicate that we did not scroll the display, or
4576 1 if we did scroll. */
4579 scrolling_window (w
, header_line_p
)
4583 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4584 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4585 int yb
= window_text_bottom_y (w
);
4586 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4587 int nruns
, nbytes
, n
, run_idx
;
4588 struct row_entry
*entry
;
4589 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4591 /* Skip over rows equal at the start. */
4592 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4594 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4595 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4599 && !d
->redraw_fringe_bitmaps_p
4601 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4602 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4603 && row_equal_p (w
, c
, d
, 1))
4612 /* Give up if some rows in the desired matrix are not enabled. */
4613 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4616 first_old
= first_new
= i
;
4618 /* Set last_new to the index + 1 of the last enabled row in the
4621 while (i
< desired_matrix
->nrows
- 1
4622 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4623 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4626 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4631 /* Set last_old to the index + 1 of the last enabled row in the
4632 current matrix. We don't look at the enabled flag here because
4633 we plan to reuse part of the display even if other parts are
4636 while (i
< current_matrix
->nrows
- 1)
4638 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4647 /* Skip over rows equal at the bottom. */
4650 while (i
- 1 > first_new
4651 && j
- 1 > first_old
4652 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4653 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4654 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4655 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4657 MATRIX_ROW (desired_matrix
, i
- 1),
4658 MATRIX_ROW (current_matrix
, j
- 1), 1))
4663 /* Nothing to do if all rows are equal. */
4664 if (last_new
== first_new
)
4667 /* Reallocate vectors, tables etc. if necessary. */
4669 if (current_matrix
->nrows
> old_lines_size
)
4671 old_lines_size
= current_matrix
->nrows
;
4672 nbytes
= old_lines_size
* sizeof *old_lines
;
4673 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4676 if (desired_matrix
->nrows
> new_lines_size
)
4678 new_lines_size
= desired_matrix
->nrows
;
4679 nbytes
= new_lines_size
* sizeof *new_lines
;
4680 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4683 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4684 if (3 * n
> row_table_size
)
4686 row_table_size
= next_almost_prime (3 * n
);
4687 nbytes
= row_table_size
* sizeof *row_table
;
4688 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4689 bzero (row_table
, nbytes
);
4692 if (n
> row_entry_pool_size
)
4694 row_entry_pool_size
= n
;
4695 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4696 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4699 if (desired_matrix
->nrows
> runs_size
)
4701 runs_size
= desired_matrix
->nrows
;
4702 nbytes
= runs_size
* sizeof *runs
;
4703 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4704 nbytes
= runs_size
* sizeof *run_pool
;
4705 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4708 nruns
= run_idx
= 0;
4711 /* Add rows from the current and desired matrix to the hash table
4712 row_hash_table to be able to find equal ones quickly. */
4714 for (i
= first_old
; i
< last_old
; ++i
)
4716 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4718 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4719 old_lines
[i
] = entry
;
4723 old_lines
[i
] = NULL
;
4726 for (i
= first_new
; i
< last_new
; ++i
)
4728 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4729 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4731 entry
->new_line_number
= i
;
4732 new_lines
[i
] = entry
;
4735 /* Identify moves based on lines that are unique and equal
4736 in both matrices. */
4737 for (i
= first_old
; i
< last_old
;)
4739 && old_lines
[i
]->old_uses
== 1
4740 && old_lines
[i
]->new_uses
== 1)
4743 int new_line
= old_lines
[i
]->new_line_number
;
4744 struct run
*run
= run_pool
+ run_idx
++;
4747 run
->current_vpos
= i
;
4748 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4749 run
->desired_vpos
= new_line
;
4750 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4752 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4754 /* Extend backward. */
4757 while (j
> first_old
4759 && old_lines
[j
] == new_lines
[k
])
4761 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4762 --run
->current_vpos
;
4763 --run
->desired_vpos
;
4766 run
->desired_y
-= h
;
4767 run
->current_y
-= h
;
4771 /* Extend forward. */
4776 && old_lines
[j
] == new_lines
[k
])
4778 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4784 /* Insert run into list of all runs. Order runs by copied
4785 pixel lines. Note that we record runs that don't have to
4786 be copied because they are already in place. This is done
4787 because we can avoid calling update_window_line in this
4789 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4791 for (k
= nruns
; k
> j
; --k
)
4792 runs
[k
] = runs
[k
- 1];
4801 /* Do the moves. Do it in a way that we don't overwrite something
4802 we want to copy later on. This is not solvable in general
4803 because there is only one display and we don't have a way to
4804 exchange areas on this display. Example:
4806 +-----------+ +-----------+
4808 +-----------+ --> +-----------+
4810 +-----------+ +-----------+
4812 Instead, prefer bigger moves, and invalidate moves that would
4813 copy from where we copied to. */
4815 for (i
= 0; i
< nruns
; ++i
)
4816 if (runs
[i
]->nrows
> 0)
4818 struct run
*r
= runs
[i
];
4820 /* Copy on the display. */
4821 if (r
->current_y
!= r
->desired_y
)
4823 rif
->scroll_run_hook (w
, r
);
4825 /* Invalidate runs that copy from where we copied to. */
4826 for (j
= i
+ 1; j
< nruns
; ++j
)
4828 struct run
*p
= runs
[j
];
4830 if ((p
->current_y
>= r
->desired_y
4831 && p
->current_y
< r
->desired_y
+ r
->height
)
4832 || (p
->current_y
+ p
->height
>= r
->desired_y
4833 && (p
->current_y
+ p
->height
4834 < r
->desired_y
+ r
->height
)))
4839 /* Assign matrix rows. */
4840 for (j
= 0; j
< r
->nrows
; ++j
)
4842 struct glyph_row
*from
, *to
;
4843 int to_overlapped_p
;
4845 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4846 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4847 to_overlapped_p
= to
->overlapped_p
;
4848 if (!from
->mode_line_p
&& !w
->pseudo_window_p
4849 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
4850 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
4851 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
4852 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
4853 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
4854 from
->redraw_fringe_bitmaps_p
= 1;
4855 assign_row (to
, from
);
4856 to
->enabled_p
= 1, from
->enabled_p
= 0;
4857 to
->overlapped_p
= to_overlapped_p
;
4861 /* Clear the hash table, for the next time. */
4862 for (i
= 0; i
< row_entry_idx
; ++i
)
4863 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4865 /* Value is > 0 to indicate that we scrolled the display. */
4871 /************************************************************************
4873 ************************************************************************/
4875 /* Update the desired frame matrix of frame F.
4877 FORCE_P non-zero means that the update should not be stopped by
4878 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4879 should not be tried.
4881 Value is non-zero if update was stopped due to pending input. */
4884 update_frame_1 (f
, force_p
, inhibit_id_p
)
4889 /* Frame matrices to work on. */
4890 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4891 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4894 int preempt_count
= baud_rate
/ 2400 + 1;
4895 extern int input_pending
;
4897 xassert (current_matrix
&& desired_matrix
);
4899 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4900 calculate_costs (f
);
4902 if (preempt_count
<= 0)
4905 #if !PERIODIC_PREEMPTION_CHECKING
4906 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4913 /* If we cannot insert/delete lines, it's no use trying it. */
4914 if (!FRAME_LINE_INS_DEL_OK (f
))
4917 /* See if any of the desired lines are enabled; don't compute for
4918 i/d line if just want cursor motion. */
4919 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4920 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4923 /* Try doing i/d line, if not yet inhibited. */
4924 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4925 force_p
|= scrolling (f
);
4927 /* Update the individual lines as needed. Do bottom line first. */
4928 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4929 update_frame_line (f
, desired_matrix
->nrows
- 1);
4931 /* Now update the rest of the lines. */
4932 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4934 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4936 if (FRAME_TERMCAP_P (f
))
4938 /* Flush out every so many lines.
4939 Also flush out if likely to have more than 1k buffered
4940 otherwise. I'm told that some telnet connections get
4941 really screwed by more than 1k output at once. */
4942 FILE *display_output
= FRAME_TTY (f
)->output
;
4945 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4947 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4949 fflush (display_output
);
4950 if (preempt_count
== 1)
4952 #ifdef EMACS_OUTQSIZE
4953 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4954 /* Probably not a tty. Ignore the error and reset
4956 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4959 if (baud_rate
<= outq
&& baud_rate
> 0)
4960 sleep (outq
/ baud_rate
);
4966 #if PERIODIC_PREEMPTION_CHECKING
4970 EMACS_GET_TIME (tm
);
4971 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4972 if (EMACS_TIME_NEG_P (dif
))
4974 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4975 if (detect_input_pending_ignore_squeezables ())
4980 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4981 detect_input_pending_ignore_squeezables ();
4984 update_frame_line (f
, i
);
4988 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4990 /* Now just clean up termcap drivers and set cursor, etc. */
4993 if ((cursor_in_echo_area
4994 /* If we are showing a message instead of the mini-buffer,
4995 show the cursor for the message instead of for the
4996 (now hidden) mini-buffer contents. */
4997 || (EQ (minibuf_window
, selected_window
)
4998 && EQ (minibuf_window
, echo_area_window
)
4999 && !NILP (echo_area_buffer
[0])))
5000 /* These cases apply only to the frame that contains
5001 the active mini-buffer window. */
5002 && FRAME_HAS_MINIBUF_P (f
)
5003 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5005 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5008 if (cursor_in_echo_area
< 0)
5010 /* Negative value of cursor_in_echo_area means put
5011 cursor at beginning of line. */
5017 /* Positive value of cursor_in_echo_area means put
5018 cursor at the end of the prompt. If the mini-buffer
5019 is several lines high, find the last line that has
5021 row
= FRAME_LINES (f
);
5027 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5029 /* Frame rows are filled up with spaces that
5030 must be ignored here. */
5031 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5033 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5034 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5037 && (last
- 1)->charpos
< 0)
5043 while (row
> top
&& col
== 0);
5045 /* Make sure COL is not out of range. */
5046 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5048 /* If we have another row, advance cursor into it. */
5049 if (row
< FRAME_LINES (f
) - 1)
5051 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5054 /* Otherwise move it back in range. */
5056 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5060 cursor_to (f
, row
, col
);
5064 /* We have only one cursor on terminal frames. Use it to
5065 display the cursor of the selected window. */
5066 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5067 if (w
->cursor
.vpos
>= 0
5068 /* The cursor vpos may be temporarily out of bounds
5069 in the following situation: There is one window,
5070 with the cursor in the lower half of it. The window
5071 is split, and a message causes a redisplay before
5072 a new cursor position has been computed. */
5073 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5075 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5076 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5078 if (INTEGERP (w
->left_margin_cols
))
5079 x
+= XFASTINT (w
->left_margin_cols
);
5081 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5082 cursor_to (f
, y
, x
);
5089 clear_desired_matrices (f
);
5094 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5098 struct frame
*frame
;
5100 int unchanged_at_top
, unchanged_at_bottom
;
5103 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5104 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5105 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5106 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5108 int free_at_end_vpos
= FRAME_LINES (frame
);
5109 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5110 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5112 if (!current_matrix
)
5115 /* Compute hash codes of all the lines. Also calculate number of
5116 changed lines, number of unchanged lines at the beginning, and
5117 number of unchanged lines at the end. */
5119 unchanged_at_top
= 0;
5120 unchanged_at_bottom
= FRAME_LINES (frame
);
5121 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5123 /* Give up on this scrolling if some old lines are not enabled. */
5124 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5126 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5127 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5129 /* This line cannot be redrawn, so don't let scrolling mess it. */
5130 new_hash
[i
] = old_hash
[i
];
5131 #define INFINITY 1000000 /* Taken from scroll.c */
5132 draw_cost
[i
] = INFINITY
;
5136 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5137 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5140 if (old_hash
[i
] != new_hash
[i
])
5143 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5145 else if (i
== unchanged_at_top
)
5147 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5150 /* If changed lines are few, don't allow preemption, don't scroll. */
5151 if ((!FRAME_SCROLL_REGION_OK (frame
)
5152 && changed_lines
< baud_rate
/ 2400)
5153 || unchanged_at_bottom
== FRAME_LINES (frame
))
5156 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5157 - unchanged_at_bottom
);
5159 if (FRAME_SCROLL_REGION_OK (frame
))
5160 free_at_end_vpos
-= unchanged_at_bottom
;
5161 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5162 free_at_end_vpos
= -1;
5164 /* If large window, fast terminal and few lines in common between
5165 current frame and desired frame, don't bother with i/d calc. */
5166 if (!FRAME_SCROLL_REGION_OK (frame
)
5167 && window_size
>= 18 && baud_rate
> 2400
5169 10 * scrolling_max_lines_saved (unchanged_at_top
,
5170 FRAME_LINES (frame
) - unchanged_at_bottom
,
5171 old_hash
, new_hash
, draw_cost
)))
5174 if (window_size
< 2)
5177 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5178 draw_cost
+ unchanged_at_top
- 1,
5179 old_draw_cost
+ unchanged_at_top
- 1,
5180 old_hash
+ unchanged_at_top
- 1,
5181 new_hash
+ unchanged_at_top
- 1,
5182 free_at_end_vpos
- unchanged_at_top
);
5188 /* Count the number of blanks at the start of the vector of glyphs R
5189 which is LEN glyphs long. */
5192 count_blanks (r
, len
)
5198 for (i
= 0; i
< len
; ++i
)
5199 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5206 /* Count the number of glyphs in common at the start of the glyph
5207 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5208 of STR2. Value is the number of equal glyphs equal at the start. */
5211 count_match (str1
, end1
, str2
, end2
)
5212 struct glyph
*str1
, *end1
, *str2
, *end2
;
5214 struct glyph
*p1
= str1
;
5215 struct glyph
*p2
= str2
;
5219 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5226 /* Char insertion/deletion cost vector, from term.c */
5228 extern int *char_ins_del_vector
;
5229 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5232 /* Perform a frame-based update on line VPOS in frame FRAME. */
5235 update_frame_line (f
, vpos
)
5239 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5241 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5242 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5243 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5244 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5245 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5246 int must_write_whole_line_p
;
5247 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5248 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5249 != FACE_TTY_DEFAULT_BG_COLOR
);
5251 if (colored_spaces_p
)
5254 /* Current row not enabled means it has unknown contents. We must
5255 write the whole desired line in that case. */
5256 must_write_whole_line_p
= !current_row
->enabled_p
;
5257 if (must_write_whole_line_p
)
5264 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5265 olen
= current_row
->used
[TEXT_AREA
];
5267 /* Ignore trailing spaces, if we can. */
5268 if (!write_spaces_p
)
5269 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5273 current_row
->enabled_p
= 1;
5274 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5276 /* If desired line is empty, just clear the line. */
5277 if (!desired_row
->enabled_p
)
5283 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5284 nlen
= desired_row
->used
[TEXT_AREA
];
5285 nend
= nbody
+ nlen
;
5287 /* If display line has unknown contents, write the whole line. */
5288 if (must_write_whole_line_p
)
5290 /* Ignore spaces at the end, if we can. */
5291 if (!write_spaces_p
)
5292 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5295 /* Write the contents of the desired line. */
5298 cursor_to (f
, vpos
, 0);
5299 write_glyphs (f
, nbody
, nlen
);
5302 /* Don't call clear_end_of_line if we already wrote the whole
5303 line. The cursor will not be at the right margin in that
5304 case but in the line below. */
5305 if (nlen
< FRAME_TOTAL_COLS (f
))
5307 cursor_to (f
, vpos
, nlen
);
5308 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5311 /* Make sure we are in the right row, otherwise cursor movement
5312 with cmgoto might use `ch' in the wrong row. */
5313 cursor_to (f
, vpos
, 0);
5315 make_current (desired_matrix
, current_matrix
, vpos
);
5319 /* Pretend trailing spaces are not there at all,
5320 unless for one reason or another we must write all spaces. */
5321 if (!write_spaces_p
)
5322 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5325 /* If there's no i/d char, quickly do the best we can without it. */
5326 if (!FRAME_CHAR_INS_DEL_OK (f
))
5330 /* Find the first glyph in desired row that doesn't agree with
5331 a glyph in the current row, and write the rest from there on. */
5332 for (i
= 0; i
< nlen
; i
++)
5334 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5336 /* Find the end of the run of different glyphs. */
5340 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5341 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5344 /* Output this run of non-matching chars. */
5345 cursor_to (f
, vpos
, i
);
5346 write_glyphs (f
, nbody
+ i
, j
- i
);
5349 /* Now find the next non-match. */
5353 /* Clear the rest of the line, or the non-clear part of it. */
5356 cursor_to (f
, vpos
, nlen
);
5357 clear_end_of_line (f
, olen
);
5360 /* Make current row = desired row. */
5361 make_current (desired_matrix
, current_matrix
, vpos
);
5365 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5366 characters in a row. */
5370 /* If current line is blank, skip over initial spaces, if
5371 possible, and write the rest. */
5375 nsp
= count_blanks (nbody
, nlen
);
5379 cursor_to (f
, vpos
, nsp
);
5380 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5383 /* Exchange contents between current_frame and new_frame. */
5384 make_current (desired_matrix
, current_matrix
, vpos
);
5388 /* Compute number of leading blanks in old and new contents. */
5389 osp
= count_blanks (obody
, olen
);
5390 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5392 /* Compute number of matching chars starting with first non-blank. */
5393 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5394 nbody
+ nsp
, nbody
+ nlen
);
5396 /* Spaces in new match implicit space past the end of old. */
5397 /* A bug causing this to be a no-op was fixed in 18.29. */
5398 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5401 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5405 /* Avoid doing insert/delete char
5406 just cause number of leading spaces differs
5407 when the following text does not match. */
5408 if (begmatch
== 0 && osp
!= nsp
)
5409 osp
= nsp
= min (osp
, nsp
);
5411 /* Find matching characters at end of line */
5414 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5416 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5421 endmatch
= obody
+ olen
- op1
;
5423 /* tem gets the distance to insert or delete.
5424 endmatch is how many characters we save by doing so.
5427 tem
= (nlen
- nsp
) - (olen
- osp
);
5429 && (!FRAME_CHAR_INS_DEL_OK (f
)
5430 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5433 /* nsp - osp is the distance to insert or delete.
5434 If that is nonzero, begmatch is known to be nonzero also.
5435 begmatch + endmatch is how much we save by doing the ins/del.
5439 && (!FRAME_CHAR_INS_DEL_OK (f
)
5440 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5444 osp
= nsp
= min (osp
, nsp
);
5447 /* Now go through the line, inserting, writing and
5448 deleting as appropriate. */
5452 cursor_to (f
, vpos
, nsp
);
5453 delete_glyphs (f
, osp
- nsp
);
5457 /* If going to delete chars later in line
5458 and insert earlier in the line,
5459 must delete first to avoid losing data in the insert */
5460 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5462 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5463 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5464 olen
= nlen
- (nsp
- osp
);
5466 cursor_to (f
, vpos
, osp
);
5467 insert_glyphs (f
, 0, nsp
- osp
);
5471 tem
= nsp
+ begmatch
+ endmatch
;
5472 if (nlen
!= tem
|| olen
!= tem
)
5474 if (!endmatch
|| nlen
== olen
)
5476 /* If new text being written reaches right margin, there is
5477 no need to do clear-to-eol at the end of this function
5478 (and it would not be safe, since cursor is not going to
5479 be "at the margin" after the text is done). */
5480 if (nlen
== FRAME_TOTAL_COLS (f
))
5483 /* Function write_glyphs is prepared to do nothing
5484 if passed a length <= 0. Check it here to avoid
5485 unnecessary cursor movement. */
5488 cursor_to (f
, vpos
, nsp
+ begmatch
);
5489 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5492 else if (nlen
> olen
)
5494 /* Here, we used to have the following simple code:
5495 ----------------------------------------
5496 write_glyphs (nbody + nsp + begmatch, olen - tem);
5497 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5498 ----------------------------------------
5499 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5500 is a padding glyph. */
5501 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5504 cursor_to (f
, vpos
, nsp
+ begmatch
);
5506 /* Calculate columns we can actually overwrite. */
5507 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5509 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5511 /* If we left columns to be overwritten, we must delete them. */
5512 del
= olen
- tem
- out
;
5514 delete_glyphs (f
, del
);
5516 /* At last, we insert columns not yet written out. */
5517 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5520 else if (olen
> nlen
)
5522 cursor_to (f
, vpos
, nsp
+ begmatch
);
5523 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5524 delete_glyphs (f
, olen
- nlen
);
5530 /* If any unerased characters remain after the new line, erase them. */
5533 cursor_to (f
, vpos
, nlen
);
5534 clear_end_of_line (f
, olen
);
5537 /* Exchange contents between current_frame and new_frame. */
5538 make_current (desired_matrix
, current_matrix
, vpos
);
5543 /***********************************************************************
5544 X/Y Position -> Buffer Position
5545 ***********************************************************************/
5547 /* Determine what's under window-relative pixel position (*X, *Y).
5548 Return the object (string or buffer) that's there.
5549 Return in *POS the position in that object.
5550 Adjust *X and *Y to character positions. */
5553 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5556 struct display_pos
*pos
;
5557 Lisp_Object
*object
;
5559 int *width
, *height
;
5562 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5563 struct text_pos startp
;
5565 struct glyph_row
*row
;
5566 #ifdef HAVE_WINDOW_SYSTEM
5567 struct image
*img
= 0;
5571 /* We used to set current_buffer directly here, but that does the
5572 wrong thing with `face-remapping-alist' (bug#2044). */
5573 Fset_buffer (w
->buffer
);
5574 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5575 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5576 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5577 start_display (&it
, w
, startp
);
5579 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5580 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5581 MOVE_TO_X
| MOVE_TO_Y
);
5583 Fset_buffer (old_current_buffer
);
5585 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5586 *dy
= *y
- it
.current_y
;
5589 if (STRINGP (it
.string
))
5593 #ifdef HAVE_WINDOW_SYSTEM
5594 if (it
.what
== IT_IMAGE
)
5596 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5597 && !NILP (img
->spec
))
5598 *object
= img
->spec
;
5602 if (it
.vpos
< w
->current_matrix
->nrows
5603 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5606 if (it
.hpos
< row
->used
[TEXT_AREA
])
5608 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5609 #ifdef HAVE_WINDOW_SYSTEM
5612 *dy
-= row
->ascent
- glyph
->ascent
;
5613 *dx
+= glyph
->slice
.x
;
5614 *dy
+= glyph
->slice
.y
;
5615 /* Image slices positions are still relative to the entire image */
5616 *width
= img
->width
;
5617 *height
= img
->height
;
5622 *width
= glyph
->pixel_width
;
5623 *height
= glyph
->ascent
+ glyph
->descent
;
5629 *height
= row
->height
;
5634 *width
= *height
= 0;
5637 /* Add extra (default width) columns if clicked after EOL. */
5638 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5640 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5649 /* Value is the string under window-relative coordinates X/Y in the
5650 mode line or header line (PART says which) of window W, or nil if none.
5651 *CHARPOS is set to the position in the string returned. */
5654 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5656 enum window_part part
;
5659 Lisp_Object
*object
;
5661 int *width
, *height
;
5663 struct glyph_row
*row
;
5664 struct glyph
*glyph
, *end
;
5666 Lisp_Object string
= Qnil
;
5668 if (part
== ON_MODE_LINE
)
5669 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5671 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5673 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5675 if (row
->mode_line_p
&& row
->enabled_p
)
5677 /* Find the glyph under X. If we find one with a string object,
5678 it's the one we were looking for. */
5679 glyph
= row
->glyphs
[TEXT_AREA
];
5680 end
= glyph
+ row
->used
[TEXT_AREA
];
5681 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5682 x0
-= glyph
->pixel_width
;
5683 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5686 string
= glyph
->object
;
5687 *charpos
= glyph
->charpos
;
5688 *width
= glyph
->pixel_width
;
5689 *height
= glyph
->ascent
+ glyph
->descent
;
5690 #ifdef HAVE_WINDOW_SYSTEM
5691 if (glyph
->type
== IMAGE_GLYPH
)
5694 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5696 *object
= img
->spec
;
5697 y0
-= row
->ascent
- glyph
->ascent
;
5703 /* Add extra (default width) columns if clicked after EOL. */
5704 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5706 *height
= row
->height
;
5713 *width
= *height
= 0;
5723 /* Value is the string under window-relative coordinates X/Y in either
5724 marginal area, or nil if none. *CHARPOS is set to the position in
5725 the string returned. */
5728 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5730 enum window_part part
;
5733 Lisp_Object
*object
;
5735 int *width
, *height
;
5737 struct glyph_row
*row
= w
->current_matrix
->rows
;
5738 struct glyph
*glyph
, *end
;
5739 int x0
, y0
, i
, wy
= *y
;
5741 Lisp_Object string
= Qnil
;
5743 if (part
== ON_LEFT_MARGIN
)
5744 area
= LEFT_MARGIN_AREA
;
5745 else if (part
== ON_RIGHT_MARGIN
)
5746 area
= RIGHT_MARGIN_AREA
;
5750 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5751 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5754 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5758 /* Find the glyph under X. If we find one with a string object,
5759 it's the one we were looking for. */
5760 if (area
== RIGHT_MARGIN_AREA
)
5761 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5762 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5763 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5764 + window_box_width (w
, LEFT_MARGIN_AREA
)
5765 + window_box_width (w
, TEXT_AREA
));
5767 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5768 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5771 glyph
= row
->glyphs
[area
];
5772 end
= glyph
+ row
->used
[area
];
5773 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5774 x0
-= glyph
->pixel_width
;
5775 *x
= glyph
- row
->glyphs
[area
];
5778 string
= glyph
->object
;
5779 *charpos
= glyph
->charpos
;
5780 *width
= glyph
->pixel_width
;
5781 *height
= glyph
->ascent
+ glyph
->descent
;
5782 #ifdef HAVE_WINDOW_SYSTEM
5783 if (glyph
->type
== IMAGE_GLYPH
)
5786 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5788 *object
= img
->spec
;
5789 y0
-= row
->ascent
- glyph
->ascent
;
5790 x0
+= glyph
->slice
.x
;
5791 y0
+= glyph
->slice
.y
;
5797 /* Add extra (default width) columns if clicked after EOL. */
5798 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5800 *height
= row
->height
;
5807 *width
= *height
= 0;
5817 /***********************************************************************
5818 Changing Frame Sizes
5819 ***********************************************************************/
5824 window_change_signal (signalnum
) /* If we don't have an argument, */
5825 int signalnum
; /* some compilers complain in signal calls. */
5828 int old_errno
= errno
;
5830 struct tty_display_info
*tty
;
5832 signal (SIGWINCH
, window_change_signal
);
5833 SIGNAL_THREAD_CHECK (signalnum
);
5835 /* The frame size change obviously applies to a single
5836 termcap-controlled terminal, but we can't decide which.
5837 Therefore, we resize the frames corresponding to each tty.
5839 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5841 if (! tty
->term_initted
)
5844 /* Suspended tty frames have tty->input == NULL avoid trying to
5849 get_tty_size (fileno (tty
->input
), &width
, &height
);
5851 if (width
> 5 && height
> 2) {
5852 Lisp_Object tail
, frame
;
5854 FOR_EACH_FRAME (tail
, frame
)
5855 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5856 /* Record the new sizes, but don't reallocate the data
5857 structures now. Let that be done later outside of the
5859 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5865 #endif /* SIGWINCH */
5868 /* Do any change in frame size that was requested by a signal. SAFE
5869 non-zero means this function is called from a place where it is
5870 safe to change frame sizes while a redisplay is in progress. */
5873 do_pending_window_change (safe
)
5876 /* If window_change_signal should have run before, run it now. */
5877 if (redisplaying_p
&& !safe
)
5880 while (delayed_size_change
)
5882 Lisp_Object tail
, frame
;
5884 delayed_size_change
= 0;
5886 FOR_EACH_FRAME (tail
, frame
)
5888 struct frame
*f
= XFRAME (frame
);
5890 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5891 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5898 /* Change the frame height and/or width. Values may be given as zero to
5899 indicate no change is to take place.
5901 If DELAY is non-zero, then assume we're being called from a signal
5902 handler, and queue the change for later - perhaps the next
5903 redisplay. Since this tries to resize windows, we can't call it
5904 from a signal handler.
5906 SAFE non-zero means this function is called from a place where it's
5907 safe to change frame sizes while a redisplay is in progress. */
5910 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5911 register struct frame
*f
;
5912 int newheight
, newwidth
, pretend
, delay
, safe
;
5914 Lisp_Object tail
, frame
;
5916 if (FRAME_MSDOS_P (f
))
5918 /* On MS-DOS, all frames use the same screen, so a change in
5919 size affects all frames. Termcap now supports multiple
5921 FOR_EACH_FRAME (tail
, frame
)
5922 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5923 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5924 pretend
, delay
, safe
);
5927 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5931 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5932 register struct frame
*f
;
5933 int newheight
, newwidth
, pretend
, delay
, safe
;
5935 int new_frame_total_cols
;
5936 int count
= SPECPDL_INDEX ();
5938 /* If we can't deal with the change now, queue it for later. */
5939 if (delay
|| (redisplaying_p
&& !safe
))
5941 f
->new_text_lines
= newheight
;
5942 f
->new_text_cols
= newwidth
;
5943 delayed_size_change
= 1;
5947 /* This size-change overrides any pending one for this frame. */
5948 f
->new_text_lines
= 0;
5949 f
->new_text_cols
= 0;
5951 /* If an argument is zero, set it to the current value. */
5953 newheight
= FRAME_LINES (f
);
5955 newwidth
= FRAME_COLS (f
);
5957 /* Compute width of windows in F.
5958 This is the width of the frame without vertical scroll bars. */
5959 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5961 /* Round up to the smallest acceptable size. */
5962 check_frame_size (f
, &newheight
, &newwidth
);
5964 /* If we're not changing the frame size, quit now. */
5965 /* Frame width may be unchanged but the text portion may change, for example,
5966 fullscreen and remove/add scroll bar. */
5967 if (newheight
== FRAME_LINES (f
)
5968 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5969 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5975 /* We only can set screen dimensions to certain values supported
5976 by our video hardware. Try to find the smallest size greater
5977 or equal to the requested dimensions. */
5978 dos_set_window_size (&newheight
, &newwidth
);
5981 if (newheight
!= FRAME_LINES (f
))
5983 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5985 /* Frame has both root and mini-buffer. */
5986 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
5987 FRAME_TOP_MARGIN (f
));
5988 set_window_height (FRAME_ROOT_WINDOW (f
),
5991 - FRAME_TOP_MARGIN (f
)),
5993 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
5995 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5998 /* Frame has just one top-level window. */
5999 set_window_height (FRAME_ROOT_WINDOW (f
),
6000 newheight
- FRAME_TOP_MARGIN (f
), 2);
6002 /* MSDOS frames cannot PRETEND, as they change frame size by
6003 manipulating video hardware. */
6004 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6005 FrameRows (FRAME_TTY (f
)) = newheight
;
6008 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6010 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6011 if (FRAME_HAS_MINIBUF_P (f
))
6012 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6014 /* MSDOS frames cannot PRETEND, as they change frame size by
6015 manipulating video hardware. */
6016 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6017 FrameCols (FRAME_TTY (f
)) = newwidth
;
6019 if (WINDOWP (f
->tool_bar_window
))
6020 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6023 FRAME_LINES (f
) = newheight
;
6024 SET_FRAME_COLS (f
, newwidth
);
6027 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6028 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6030 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6032 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6033 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6034 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6035 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6039 calculate_costs (f
);
6040 SET_FRAME_GARBAGED (f
);
6045 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6047 run_window_configuration_change_hook (f
);
6049 unbind_to (count
, Qnil
);
6054 /***********************************************************************
6055 Terminal Related Lisp Functions
6056 ***********************************************************************/
6058 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6059 1, 1, "FOpen termscript file: ",
6060 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6061 FILE = nil means just close any termscript file currently open. */)
6065 struct tty_display_info
*tty
;
6067 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
6068 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
6069 error ("Current frame is not on a tty device");
6073 if (tty
->termscript
!= 0)
6076 fclose (tty
->termscript
);
6079 tty
->termscript
= 0;
6083 file
= Fexpand_file_name (file
, Qnil
);
6084 tty
->termscript
= fopen (SDATA (file
), "w");
6085 if (tty
->termscript
== 0)
6086 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6092 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6093 Ssend_string_to_terminal
, 1, 2, 0,
6094 doc
: /* Send STRING to the terminal without alteration.
6095 Control characters in STRING will have terminal-dependent effects.
6097 Optional parameter TERMINAL specifies the tty terminal device to use.
6098 It may be a terminal object, a frame, or nil for the terminal used by
6099 the currently selected frame. In batch mode, STRING is sent to stdout
6100 when TERMINAL is nil. */)
6103 Lisp_Object terminal
;
6105 struct terminal
*t
= get_terminal (terminal
, 1);
6108 /* ??? Perhaps we should do something special for multibyte strings here. */
6109 CHECK_STRING (string
);
6113 error ("Unknown terminal device");
6115 if (t
->type
== output_initial
)
6117 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
6118 error ("Device %d is not a termcap terminal device", t
->id
);
6121 struct tty_display_info
*tty
= t
->display_info
.tty
;
6124 error ("Terminal is currently suspended");
6126 if (tty
->termscript
)
6128 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6129 fflush (tty
->termscript
);
6133 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
6140 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6141 doc
: /* Beep, or flash the screen.
6142 Also, unless an argument is given,
6143 terminate any keyboard macro currently executing. */)
6152 ring_bell (XFRAME (selected_frame
));
6165 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6166 error ("Keyboard macro terminated by a command ringing the bell");
6168 ring_bell (XFRAME (selected_frame
));
6173 /***********************************************************************
6175 ***********************************************************************/
6177 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6178 doc
: /* Pause, without updating display, for SECONDS seconds.
6179 SECONDS may be a floating-point value, meaning that you can wait for a
6180 fraction of a second. Optional second arg MILLISECONDS specifies an
6181 additional wait period, in milliseconds; this may be useful if your
6182 Emacs was built without floating point support.
6183 \(Not all operating systems support waiting for a fraction of a second.) */)
6184 (seconds
, milliseconds
)
6185 Lisp_Object seconds
, milliseconds
;
6189 if (NILP (milliseconds
))
6190 XSETINT (milliseconds
, 0);
6192 CHECK_NUMBER (milliseconds
);
6193 usec
= XINT (milliseconds
) * 1000;
6196 double duration
= extract_float (seconds
);
6197 sec
= (int) duration
;
6198 usec
+= (duration
- sec
) * 1000000;
6201 #ifndef EMACS_HAS_USECS
6202 if (sec
== 0 && usec
!= 0)
6203 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6206 /* Assure that 0 <= usec < 1000000. */
6209 /* We can't rely on the rounding being correct if usec is negative. */
6210 if (-1000000 < usec
)
6211 sec
--, usec
+= 1000000;
6213 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6216 sec
+= usec
/ 1000000, usec
%= 1000000;
6218 if (sec
< 0 || (sec
== 0 && usec
== 0))
6221 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6227 /* This is just like wait_reading_process_output, except that
6230 TIMEOUT is number of seconds to wait (float or integer),
6231 or t to wait forever.
6232 READING is 1 if reading input.
6233 If DO_DISPLAY is >0 display process output while waiting.
6234 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6238 sit_for (timeout
, reading
, do_display
)
6239 Lisp_Object timeout
;
6240 int reading
, do_display
;
6244 swallow_events (do_display
);
6246 if ((detect_input_pending_run_timers (do_display
))
6247 || !NILP (Vexecuting_kbd_macro
))
6250 if (do_display
>= 2)
6251 redisplay_preserve_echo_area (2);
6253 if (INTEGERP (timeout
))
6255 sec
= XINT (timeout
);
6258 else if (FLOATP (timeout
))
6260 double seconds
= XFLOAT_DATA (timeout
);
6261 sec
= (int) seconds
;
6262 usec
= (int) ((seconds
- sec
) * 1000000);
6264 else if (EQ (timeout
, Qt
))
6270 wrong_type_argument (Qnumberp
, timeout
);
6272 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6279 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6282 return detect_input_pending () ? Qnil
: Qt
;
6286 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6287 doc
: /* Perform redisplay if no input is available.
6288 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6289 perform a full redisplay even if input is available.
6290 Return t if redisplay was performed, nil otherwise. */)
6297 if ((detect_input_pending_run_timers (1)
6298 && NILP (force
) && !redisplay_dont_pause
)
6299 || !NILP (Vexecuting_kbd_macro
))
6302 count
= SPECPDL_INDEX ();
6303 if (!NILP (force
) && !redisplay_dont_pause
)
6304 specbind (Qredisplay_dont_pause
, Qt
);
6305 redisplay_preserve_echo_area (2);
6306 unbind_to (count
, Qnil
);
6312 /***********************************************************************
6313 Other Lisp Functions
6314 ***********************************************************************/
6316 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6317 session's frames, frame names, buffers, buffer-read-only flags, and
6318 buffer-modified-flags. */
6320 static Lisp_Object frame_and_buffer_state
;
6323 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6324 Sframe_or_buffer_changed_p
, 0, 1, 0,
6325 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6326 VARIABLE is a variable name whose value is either nil or a state vector
6327 that will be updated to contain all frames and buffers,
6328 aside from buffers whose names start with space,
6329 along with the buffers' read-only and modified flags. This allows a fast
6330 check to see whether buffer menus might need to be recomputed.
6331 If this function returns non-nil, it updates the internal vector to reflect
6334 If VARIABLE is nil, an internal variable is used. Users should not
6335 pass nil for VARIABLE. */)
6337 Lisp_Object variable
;
6339 Lisp_Object state
, tail
, frame
, buf
;
6340 Lisp_Object
*vecp
, *end
;
6343 if (! NILP (variable
))
6345 CHECK_SYMBOL (variable
);
6346 state
= Fsymbol_value (variable
);
6347 if (! VECTORP (state
))
6351 state
= frame_and_buffer_state
;
6353 vecp
= XVECTOR (state
)->contents
;
6354 end
= vecp
+ XVECTOR (state
)->size
;
6356 FOR_EACH_FRAME (tail
, frame
)
6360 if (!EQ (*vecp
++, frame
))
6364 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6367 /* Check that the buffer info matches. */
6368 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6370 buf
= XCDR (XCAR (tail
));
6371 /* Ignore buffers that aren't included in buffer lists. */
6372 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6376 if (!EQ (*vecp
++, buf
))
6380 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6384 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6389 /* Detect deletion of a buffer at the end of the list. */
6390 if (EQ (*vecp
, Qlambda
))
6393 /* Come here if we decide the data has changed. */
6395 /* Count the size we will need.
6396 Start with 1 so there is room for at least one lambda at the end. */
6398 FOR_EACH_FRAME (tail
, frame
)
6400 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6402 /* Reallocate the vector if data has grown to need it,
6403 or if it has shrunk a lot. */
6404 if (! VECTORP (state
)
6405 || n
> XVECTOR (state
)->size
6406 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6407 /* Add 20 extra so we grow it less often. */
6409 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6410 if (! NILP (variable
))
6411 Fset (variable
, state
);
6413 frame_and_buffer_state
= state
;
6416 /* Record the new data in the (possibly reallocated) vector. */
6417 vecp
= XVECTOR (state
)->contents
;
6418 FOR_EACH_FRAME (tail
, frame
)
6421 *vecp
++ = XFRAME (frame
)->name
;
6423 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6425 buf
= XCDR (XCAR (tail
));
6426 /* Ignore buffers that aren't included in buffer lists. */
6427 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6430 *vecp
++ = XBUFFER (buf
)->read_only
;
6431 *vecp
++ = Fbuffer_modified_p (buf
);
6433 /* Fill up the vector with lambdas (always at least one). */
6435 while (vecp
- XVECTOR (state
)->contents
6436 < XVECTOR (state
)->size
)
6438 /* Make sure we didn't overflow the vector. */
6439 if (vecp
- XVECTOR (state
)->contents
6440 > XVECTOR (state
)->size
)
6447 /***********************************************************************
6449 ***********************************************************************/
6451 /* Initialization done when Emacs fork is started, before doing stty.
6452 Determine terminal type and set terminal_driver. Then invoke its
6453 decoding routine to set up variables in the terminal package. */
6458 char *terminal_type
;
6460 #ifdef HAVE_X_WINDOWS
6461 extern int display_arg
;
6464 /* Construct the space glyph. */
6465 space_glyph
.type
= CHAR_GLYPH
;
6466 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6467 space_glyph
.charpos
= -1;
6470 cursor_in_echo_area
= 0;
6471 terminal_type
= (char *) 0;
6473 /* Now is the time to initialize this; it's used by init_sys_modes
6475 Vinitial_window_system
= Qnil
;
6477 /* SIGWINCH needs to be handled no matter what display we start
6478 with. Otherwise newly opened tty frames will not resize
6483 #endif /* CANNOT_DUMP */
6484 signal (SIGWINCH
, window_change_signal
);
6485 #endif /* SIGWINCH */
6487 /* If running as a daemon, no need to initialize any frames/terminal. */
6491 /* If the user wants to use a window system, we shouldn't bother
6492 initializing the terminal. This is especially important when the
6493 terminal is so dumb that emacs gives up before and doesn't bother
6494 using the window system.
6496 If the DISPLAY environment variable is set and nonempty,
6497 try to use X, and die with an error message if that doesn't work. */
6499 #ifdef HAVE_X_WINDOWS
6500 if (! inhibit_window_system
&& ! display_arg
)
6503 display
= getenv ("DISPLAY");
6504 display_arg
= (display
!= 0 && *display
!= 0);
6506 if (display_arg
&& !x_display_ok (display
))
6508 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6510 inhibit_window_system
= 1;
6514 if (!inhibit_window_system
&& display_arg
6520 Vinitial_window_system
= Qx
;
6522 Vwindow_system_version
= make_number (11);
6524 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6525 /* In some versions of ncurses,
6526 tputs crashes if we have not called tgetent.
6528 { char b
[2044]; tgetent (b
, "xterm");}
6530 adjust_frame_glyphs_initially ();
6533 #endif /* HAVE_X_WINDOWS */
6536 if (!inhibit_window_system
)
6538 Vinitial_window_system
= Qw32
;
6539 Vwindow_system_version
= make_number (1);
6540 adjust_frame_glyphs_initially ();
6543 #endif /* HAVE_NTGUI */
6546 if (!inhibit_window_system
6552 Vinitial_window_system
= Qns
;
6553 Vwindow_system_version
= make_number(10);
6554 adjust_frame_glyphs_initially ();
6559 /* If no window system has been specified, try to use the terminal. */
6562 fatal ("standard input is not a tty");
6567 terminal_type
= "w32console";
6569 /* Look at the TERM variable. */
6570 terminal_type
= (char *) getenv ("TERM");
6574 #ifdef HAVE_WINDOW_SYSTEM
6575 if (! inhibit_window_system
)
6576 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6578 #endif /* HAVE_WINDOW_SYSTEM */
6579 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6585 struct frame
*f
= XFRAME (selected_frame
);
6587 /* Open a display on the controlling tty. */
6588 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6590 /* Convert the initial frame to use the new display. */
6591 if (f
->output_method
!= output_initial
)
6593 f
->output_method
= t
->type
;
6596 t
->reference_count
++;
6597 t
->display_info
.tty
->top_frame
= selected_frame
;
6598 change_frame_size (XFRAME (selected_frame
),
6599 FrameRows (t
->display_info
.tty
),
6600 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6602 /* Delete the initial terminal. */
6603 if (--initial_terminal
->reference_count
== 0
6604 && initial_terminal
->delete_terminal_hook
)
6605 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6607 /* Update frame parameters to reflect the new type. */
6608 Fmodify_frame_parameters
6609 (selected_frame
, Fcons (Fcons (Qtty_type
,
6610 Ftty_type (selected_frame
)), Qnil
));
6611 if (t
->display_info
.tty
->name
)
6612 Fmodify_frame_parameters (selected_frame
,
6613 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6616 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6621 struct frame
*sf
= SELECTED_FRAME ();
6622 int width
= FRAME_TOTAL_COLS (sf
);
6623 int height
= FRAME_LINES (sf
);
6625 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6627 /* If these sizes are so big they cause overflow, just ignore the
6628 change. It's not clear what better we could do. */
6629 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6630 fatal ("screen size %dx%d too big", width
, height
);
6633 adjust_frame_glyphs_initially ();
6634 calculate_costs (XFRAME (selected_frame
));
6636 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6639 && NILP (Vinitial_window_system
))
6641 /* For the initial frame, we don't have any way of knowing what
6642 are the foreground and background colors of the terminal. */
6643 struct frame
*sf
= SELECTED_FRAME();
6645 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6646 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6647 call0 (intern ("tty-set-up-initial-frame-faces"));
6653 /***********************************************************************
6655 ***********************************************************************/
6657 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6658 Sinternal_show_cursor
, 2, 2, 0,
6659 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6660 WINDOW nil means use the selected window. SHOW non-nil means
6661 show a cursor in WINDOW in the next redisplay. SHOW nil means
6662 don't show a cursor. */)
6664 Lisp_Object window
, show
;
6666 /* Don't change cursor state while redisplaying. This could confuse
6668 if (!redisplaying_p
)
6671 window
= selected_window
;
6673 CHECK_WINDOW (window
);
6675 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6682 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6683 Sinternal_show_cursor_p
, 0, 1, 0,
6684 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6685 WINDOW nil or omitted means report on the selected window. */)
6692 window
= selected_window
;
6694 CHECK_WINDOW (window
);
6696 w
= XWINDOW (window
);
6697 return w
->cursor_off_p
? Qnil
: Qt
;
6700 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6701 Slast_nonminibuf_frame
, 0, 0, 0,
6702 doc
: /* Value is last nonminibuffer frame. */)
6705 Lisp_Object frame
= Qnil
;
6707 if (last_nonminibuf_frame
)
6708 XSETFRAME (frame
, last_nonminibuf_frame
);
6713 /***********************************************************************
6715 ***********************************************************************/
6720 defsubr (&Sredraw_frame
);
6721 defsubr (&Sredraw_display
);
6722 defsubr (&Sframe_or_buffer_changed_p
);
6723 defsubr (&Sopen_termscript
);
6725 defsubr (&Sredisplay
);
6726 defsubr (&Ssleep_for
);
6727 defsubr (&Ssend_string_to_terminal
);
6728 defsubr (&Sinternal_show_cursor
);
6729 defsubr (&Sinternal_show_cursor_p
);
6730 defsubr (&Slast_nonminibuf_frame
);
6733 defsubr (&Sdump_redisplay_history
);
6736 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6737 staticpro (&frame_and_buffer_state
);
6739 Qdisplay_table
= intern_c_string ("display-table");
6740 staticpro (&Qdisplay_table
);
6741 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
6742 staticpro (&Qredisplay_dont_pause
);
6744 DEFVAR_INT ("baud-rate", &baud_rate
,
6745 doc
: /* *The output baud rate of the terminal.
6746 On most systems, changing this value will affect the amount of padding
6747 and the other strategic decisions made during redisplay. */);
6749 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6750 doc
: /* *Non-nil means invert the entire frame display.
6751 This means everything is in inverse video which otherwise would not be. */);
6753 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6754 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6756 See also `ring-bell-function'. */);
6758 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6759 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6760 A non-nil value is useful if the terminal can automatically preserve
6761 Emacs's frame display when you reenter Emacs.
6762 It is up to you to set this variable if your terminal can do that. */);
6764 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6765 doc
: /* Name of the window system that Emacs uses for the first frame.
6766 The value is a symbol--for instance, `x' for X windows.
6767 The value is nil if Emacs is using a text-only terminal. */);
6769 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6770 doc
: /* Name of window system through which the selected frame is displayed.
6771 The value is a symbol--for instance, `x' for X windows.
6772 The value is nil if the selected frame is on a text-only-terminal. */);
6774 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6775 doc
: /* The version number of the window system in use.
6776 For X windows, this is 11. */);
6778 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6779 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6781 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6782 doc
: /* Table defining how to output a glyph code to the frame.
6783 If not nil, this is a vector indexed by glyph code to define the glyph.
6784 Each element can be:
6785 integer: a glyph code which this glyph is an alias for.
6786 string: output this glyph using that string (not impl. in X windows).
6787 nil: this glyph mod 524288 is the code of a character to output,
6788 and this glyph / 524288 is the face number (see `face-id') to use
6789 while outputting it. */);
6790 Vglyph_table
= Qnil
;
6792 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6793 doc
: /* Display table to use for buffers that specify none.
6794 See `buffer-display-table' for more information. */);
6795 Vstandard_display_table
= Qnil
;
6797 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6798 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6799 redisplay_dont_pause
= 0;
6801 #if PERIODIC_PREEMPTION_CHECKING
6802 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
6803 doc
: /* *The period in seconds between checking for input during redisplay.
6804 If input is detected, redisplay is pre-empted, and the input is processed.
6805 If nil, never pre-empt redisplay. */);
6806 Vredisplay_preemption_period
= make_float (0.10);
6813 Vinitial_window_system
= Qnil
;
6814 Vwindow_system_version
= Qnil
;
6818 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6819 (do not change this comment) */