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 (struct frame
*);
118 static void restore_current_matrix (struct frame
*, struct glyph_matrix
*);
119 static int showing_window_margins_p (struct window
*);
120 static void fake_current_matrices (Lisp_Object
);
121 static void redraw_overlapping_rows (struct window
*, int);
122 static void redraw_overlapped_rows (struct window
*, int);
123 static int count_blanks (struct glyph
*, int);
124 static int count_match (struct glyph
*, struct glyph
*,
125 struct glyph
*, struct glyph
*);
126 static unsigned line_draw_cost (struct glyph_matrix
*, int);
127 static void update_frame_line (struct frame
*, int);
128 static struct dim allocate_matrices_for_frame_redisplay
129 (Lisp_Object
, int, int, int, int *);
130 static void allocate_matrices_for_window_redisplay (struct window
*);
131 static int realloc_glyph_pool (struct glyph_pool
*, struct dim
);
132 static void adjust_frame_glyphs (struct frame
*);
133 struct glyph_matrix
*new_glyph_matrix (struct glyph_pool
*);
134 static void free_glyph_matrix (struct glyph_matrix
*);
135 static void adjust_glyph_matrix (struct window
*, struct glyph_matrix
*,
136 int, int, struct dim
);
137 static void change_frame_size_1 (struct frame
*, int, int, int, int, int);
138 static void swap_glyph_pointers (struct glyph_row
*, struct glyph_row
*);
140 static int glyph_row_slice_p (struct glyph_row
*, struct glyph_row
*);
142 static void fill_up_frame_row_with_spaces (struct glyph_row
*, int);
143 static void build_frame_matrix_from_window_tree (struct glyph_matrix
*,
145 static void build_frame_matrix_from_leaf_window (struct glyph_matrix
*,
147 static struct glyph_pool
*new_glyph_pool (void);
148 static void free_glyph_pool (struct glyph_pool
*);
149 static void adjust_frame_glyphs_initially (void);
150 static void adjust_frame_message_buffer (struct frame
*);
151 static void adjust_decode_mode_spec_buffer (struct frame
*);
152 static void fill_up_glyph_row_with_spaces (struct glyph_row
*);
153 static void build_frame_matrix (struct frame
*);
154 void clear_current_matrices (struct frame
*);
155 void scroll_glyph_matrix_range (struct glyph_matrix
*, int, int,
157 static void clear_window_matrices (struct window
*, int);
158 static void fill_up_glyph_row_area_with_spaces (struct glyph_row
*, int);
159 static int scrolling_window (struct window
*, int);
160 static int update_window_line (struct window
*, int, int *);
161 static void update_marginal_area (struct window
*, int, int);
162 static int update_text_area (struct window
*, int);
163 static void make_current (struct glyph_matrix
*, struct glyph_matrix
*,
165 static void mirror_make_current (struct window
*, int);
166 void check_window_matrix_pointers (struct window
*);
168 static void check_matrix_pointers (struct glyph_matrix
*,
169 struct glyph_matrix
*);
171 static void mirror_line_dance (struct window
*, int, int, int *, char *);
172 static int update_window_tree (struct window
*, int);
173 static int update_window (struct window
*, int);
174 static int update_frame_1 (struct frame
*, int, int);
175 static void set_window_cursor_after_update (struct window
*);
176 static int row_equal_p (struct window
*, struct glyph_row
*,
177 struct glyph_row
*, int);
178 static void adjust_frame_glyphs_for_window_redisplay (struct frame
*);
179 static void adjust_frame_glyphs_for_frame_redisplay (struct frame
*);
180 static void reverse_rows (struct glyph_matrix
*, int, int);
181 static int margin_glyphs_to_reserve (struct window
*, int, Lisp_Object
);
182 static void sync_window_with_frame_matrix_rows (struct window
*);
183 struct window
*frame_row_to_window (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 (struct window
*, int);
329 static int window_to_frame_hpos (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 (struct frame
*, int);
359 static void add_window_display_history (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 #if defined PROFILING && !HAVE___EXECUTABLE_START
440 /* FIXME: only used to find text start for profiling. */
443 safe_bcopy (const char *from
, char *to
, int size
)
449 /***********************************************************************
451 ***********************************************************************/
453 /* Allocate and return a glyph_matrix structure. POOL is the glyph
454 pool from which memory for the matrix should be allocated, or null
455 for window-based redisplay where no glyph pools are used. The
456 member `pool' of the glyph matrix structure returned is set to
457 POOL, the structure is otherwise zeroed. */
459 struct glyph_matrix
*
460 new_glyph_matrix (struct glyph_pool
*pool
)
462 struct glyph_matrix
*result
;
464 /* Allocate and clear. */
465 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
466 memset (result
, 0, sizeof *result
);
468 /* Increment number of allocated matrices. This count is used
469 to detect memory leaks. */
470 ++glyph_matrix_count
;
472 /* Set pool and return. */
478 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
480 The global counter glyph_matrix_count is decremented when a matrix
481 is freed. If the count gets negative, more structures were freed
482 than allocated, i.e. one matrix was freed more than once or a bogus
483 pointer was passed to this function.
485 If MATRIX->pool is null, this means that the matrix manages its own
486 glyph memory---this is done for matrices on X frames. Freeing the
487 matrix also frees the glyph memory in this case. */
490 free_glyph_matrix (struct glyph_matrix
*matrix
)
496 /* Detect the case that more matrices are freed than were
498 if (--glyph_matrix_count
< 0)
501 /* Free glyph memory if MATRIX owns it. */
502 if (matrix
->pool
== NULL
)
503 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
504 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
506 /* Free row structures and the matrix itself. */
507 xfree (matrix
->rows
);
513 /* Return the number of glyphs to reserve for a marginal area of
514 window W. TOTAL_GLYPHS is the number of glyphs in a complete
515 display line of window W. MARGIN gives the width of the marginal
516 area in canonical character units. MARGIN should be an integer
520 margin_glyphs_to_reserve (struct window
*w
, int total_glyphs
, Lisp_Object margin
)
524 if (NUMBERP (margin
))
526 int width
= XFASTINT (w
->total_cols
);
527 double d
= max (0, XFLOATINT (margin
));
528 d
= min (width
/ 2 - 1, d
);
529 n
= (int) ((double) total_glyphs
/ width
* d
);
538 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
541 W is null if the function is called for a frame glyph matrix.
542 Otherwise it is the window MATRIX is a member of. X and Y are the
543 indices of the first column and row of MATRIX within the frame
544 matrix, if such a matrix exists. They are zero for purely
545 window-based redisplay. DIM is the needed size of the matrix.
547 In window-based redisplay, where no frame matrices exist, glyph
548 matrices manage their own glyph storage. Otherwise, they allocate
549 storage from a common frame glyph pool which can be found in
552 The reason for this memory management strategy is to avoid complete
553 frame redraws if possible. When we allocate from a common pool, a
554 change of the location or size of a sub-matrix within the pool
555 requires a complete redisplay of the frame because we cannot easily
556 make sure that the current matrices of all windows still agree with
557 what is displayed on the screen. While this is usually fast, it
558 leads to screen flickering. */
561 adjust_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int x
, int y
, struct dim dim
)
565 int marginal_areas_changed_p
= 0;
566 int header_line_changed_p
= 0;
567 int header_line_p
= 0;
568 int left
= -1, right
= -1;
569 int window_width
= -1, window_height
= -1;
571 /* See if W had a header line that has disappeared now, or vice versa.
575 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
577 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
578 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
580 matrix
->header_line_p
= header_line_p
;
582 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
583 Do nothing if MATRIX' size, position, vscroll, and marginal areas
584 haven't changed. This optimization is important because preserving
585 the matrix means preventing redisplay. */
586 if (matrix
->pool
== NULL
)
588 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
589 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
590 xassert (left
>= 0 && right
>= 0);
591 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
592 || right
!= matrix
->right_margin_glyphs
);
594 if (!marginal_areas_changed_p
596 && !header_line_changed_p
597 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
598 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
599 && matrix
->window_height
== window_height
600 && matrix
->window_vscroll
== w
->vscroll
601 && matrix
->window_width
== window_width
)
605 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
606 if (matrix
->rows_allocated
< dim
.height
)
608 int size
= dim
.height
* sizeof (struct glyph_row
);
609 new_rows
= dim
.height
- matrix
->rows_allocated
;
610 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
611 memset (matrix
->rows
+ matrix
->rows_allocated
, 0,
612 new_rows
* sizeof *matrix
->rows
);
613 matrix
->rows_allocated
= dim
.height
;
618 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
619 on a frame not using window-based redisplay. Set up pointers for
620 each row into the glyph pool. */
623 xassert (matrix
->pool
->glyphs
);
627 left
= margin_glyphs_to_reserve (w
, dim
.width
,
628 w
->left_margin_cols
);
629 right
= margin_glyphs_to_reserve (w
, dim
.width
,
630 w
->right_margin_cols
);
635 for (i
= 0; i
< dim
.height
; ++i
)
637 struct glyph_row
*row
= &matrix
->rows
[i
];
639 row
->glyphs
[LEFT_MARGIN_AREA
]
640 = (matrix
->pool
->glyphs
641 + (y
+ i
) * matrix
->pool
->ncolumns
645 || row
== matrix
->rows
+ dim
.height
- 1
646 || (row
== matrix
->rows
&& matrix
->header_line_p
))
648 row
->glyphs
[TEXT_AREA
]
649 = row
->glyphs
[LEFT_MARGIN_AREA
];
650 row
->glyphs
[RIGHT_MARGIN_AREA
]
651 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
652 row
->glyphs
[LAST_AREA
]
653 = row
->glyphs
[RIGHT_MARGIN_AREA
];
657 row
->glyphs
[TEXT_AREA
]
658 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
659 row
->glyphs
[RIGHT_MARGIN_AREA
]
660 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
661 row
->glyphs
[LAST_AREA
]
662 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
666 matrix
->left_margin_glyphs
= left
;
667 matrix
->right_margin_glyphs
= right
;
671 /* If MATRIX->pool is null, MATRIX is responsible for managing
672 its own memory. It is a window matrix for window-based redisplay.
673 Allocate glyph memory from the heap. */
674 if (dim
.width
> matrix
->matrix_w
676 || header_line_changed_p
677 || marginal_areas_changed_p
)
679 struct glyph_row
*row
= matrix
->rows
;
680 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
684 row
->glyphs
[LEFT_MARGIN_AREA
]
685 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
687 * sizeof (struct glyph
)));
689 /* The mode line never has marginal areas. */
690 if (row
== matrix
->rows
+ dim
.height
- 1
691 || (row
== matrix
->rows
&& matrix
->header_line_p
))
693 row
->glyphs
[TEXT_AREA
]
694 = row
->glyphs
[LEFT_MARGIN_AREA
];
695 row
->glyphs
[RIGHT_MARGIN_AREA
]
696 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
697 row
->glyphs
[LAST_AREA
]
698 = row
->glyphs
[RIGHT_MARGIN_AREA
];
702 row
->glyphs
[TEXT_AREA
]
703 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
704 row
->glyphs
[RIGHT_MARGIN_AREA
]
705 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
706 row
->glyphs
[LAST_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
713 xassert (left
>= 0 && right
>= 0);
714 matrix
->left_margin_glyphs
= left
;
715 matrix
->right_margin_glyphs
= right
;
718 /* Number of rows to be used by MATRIX. */
719 matrix
->nrows
= dim
.height
;
720 xassert (matrix
->nrows
>= 0);
724 if (matrix
== w
->current_matrix
)
726 /* Mark rows in a current matrix of a window as not having
727 valid contents. It's important to not do this for
728 desired matrices. When Emacs starts, it may already be
729 building desired matrices when this function runs. */
730 if (window_width
< 0)
731 window_width
= window_box_width (w
, -1);
733 /* Optimize the case that only the height has changed (C-x 2,
734 upper window). Invalidate all rows that are no longer part
736 if (!marginal_areas_changed_p
737 && !header_line_changed_p
739 && dim
.width
== matrix
->matrix_w
740 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
741 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
742 && matrix
->window_width
== window_width
)
744 /* Find the last row in the window. */
745 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
746 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
752 /* Window end is invalid, if inside of the rows that
753 are invalidated below. */
754 if (INTEGERP (w
->window_end_vpos
)
755 && XFASTINT (w
->window_end_vpos
) >= i
)
756 w
->window_end_valid
= Qnil
;
758 while (i
< matrix
->nrows
)
759 matrix
->rows
[i
++].enabled_p
= 0;
763 for (i
= 0; i
< matrix
->nrows
; ++i
)
764 matrix
->rows
[i
].enabled_p
= 0;
767 else if (matrix
== w
->desired_matrix
)
769 /* Rows in desired matrices always have to be cleared;
770 redisplay expects this is the case when it runs, so it
771 had better be the case when we adjust matrices between
773 for (i
= 0; i
< matrix
->nrows
; ++i
)
774 matrix
->rows
[i
].enabled_p
= 0;
779 /* Remember last values to be able to optimize frame redraws. */
780 matrix
->matrix_x
= x
;
781 matrix
->matrix_y
= y
;
782 matrix
->matrix_w
= dim
.width
;
783 matrix
->matrix_h
= dim
.height
;
785 /* Record the top y location and height of W at the time the matrix
786 was last adjusted. This is used to optimize redisplay above. */
789 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
790 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
791 matrix
->window_height
= window_height
;
792 matrix
->window_width
= window_width
;
793 matrix
->window_vscroll
= w
->vscroll
;
798 /* Reverse the contents of rows in MATRIX between START and END. The
799 contents of the row at END - 1 end up at START, END - 2 at START +
800 1 etc. This is part of the implementation of rotate_matrix (see
804 reverse_rows (struct glyph_matrix
*matrix
, int start
, int end
)
808 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
810 /* Non-ISO HP/UX compiler doesn't like auto struct
812 struct glyph_row temp
;
813 temp
= matrix
->rows
[i
];
814 matrix
->rows
[i
] = matrix
->rows
[j
];
815 matrix
->rows
[j
] = temp
;
820 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
821 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
822 indices. (Note: this does not copy glyphs, only glyph pointers in
823 row structures are moved around).
825 The algorithm used for rotating the vector was, I believe, first
826 described by Kernighan. See the vector R as consisting of two
827 sub-vectors AB, where A has length BY for BY >= 0. The result
828 after rotating is then BA. Reverse both sub-vectors to get ArBr
829 and reverse the result to get (ArBr)r which is BA. Similar for
833 rotate_matrix (struct glyph_matrix
*matrix
, int first
, int last
, int by
)
837 /* Up (rotate left, i.e. towards lower indices). */
839 reverse_rows (matrix
, first
, first
+ by
);
840 reverse_rows (matrix
, first
+ by
, last
);
841 reverse_rows (matrix
, first
, last
);
845 /* Down (rotate right, i.e. towards higher indices). */
846 reverse_rows (matrix
, last
- by
, last
);
847 reverse_rows (matrix
, first
, last
- by
);
848 reverse_rows (matrix
, first
, last
);
853 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
854 with indices START <= index < END. Increment positions by DELTA/
858 increment_matrix_positions (struct glyph_matrix
*matrix
, int start
, int end
, int delta
, int delta_bytes
)
860 /* Check that START and END are reasonable values. */
861 xassert (start
>= 0 && start
<= matrix
->nrows
);
862 xassert (end
>= 0 && end
<= matrix
->nrows
);
863 xassert (start
<= end
);
865 for (; start
< end
; ++start
)
866 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
870 /* Enable a range of rows in glyph matrix MATRIX. START and END are
871 the row indices of the first and last + 1 row to enable. If
872 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
875 enable_glyph_matrix_rows (struct glyph_matrix
*matrix
, int start
, int end
, int enabled_p
)
877 xassert (start
<= end
);
878 xassert (start
>= 0 && start
< matrix
->nrows
);
879 xassert (end
>= 0 && end
<= matrix
->nrows
);
881 for (; start
< end
; ++start
)
882 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
888 This empties all rows in MATRIX by setting the enabled_p flag for
889 all rows of the matrix to zero. The function prepare_desired_row
890 will eventually really clear a row when it sees one with a zero
893 Resets update hints to defaults value. The only update hint
894 currently present is the flag MATRIX->no_scrolling_p. */
897 clear_glyph_matrix (struct glyph_matrix
*matrix
)
901 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
902 matrix
->no_scrolling_p
= 0;
907 /* Shift part of the glyph matrix MATRIX of window W up or down.
908 Increment y-positions in glyph rows between START and END by DY,
909 and recompute their visible height. */
912 shift_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int start
, int end
, int dy
)
916 xassert (start
<= end
);
917 xassert (start
>= 0 && start
< matrix
->nrows
);
918 xassert (end
>= 0 && end
<= matrix
->nrows
);
920 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
921 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
923 for (; start
< end
; ++start
)
925 struct glyph_row
*row
= &matrix
->rows
[start
];
928 row
->visible_height
= row
->height
;
931 row
->visible_height
-= min_y
- row
->y
;
932 if (row
->y
+ row
->height
> max_y
)
933 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
938 /* Mark all rows in current matrices of frame F as invalid. Marking
939 invalid is done by setting enabled_p to zero for all rows in a
943 clear_current_matrices (register struct frame
*f
)
945 /* Clear frame current matrix, if we have one. */
946 if (f
->current_matrix
)
947 clear_glyph_matrix (f
->current_matrix
);
949 /* Clear the matrix of the menu bar window, if such a window exists.
950 The menu bar window is currently used to display menus on X when
951 no toolkit support is compiled in. */
952 if (WINDOWP (f
->menu_bar_window
))
953 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
955 /* Clear the matrix of the tool-bar window, if any. */
956 if (WINDOWP (f
->tool_bar_window
))
957 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
959 /* Clear current window matrices. */
960 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
961 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
965 /* Clear out all display lines of F for a coming redisplay. */
968 clear_desired_matrices (register struct frame
*f
)
970 if (f
->desired_matrix
)
971 clear_glyph_matrix (f
->desired_matrix
);
973 if (WINDOWP (f
->menu_bar_window
))
974 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
976 if (WINDOWP (f
->tool_bar_window
))
977 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
979 /* Do it for window matrices. */
980 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
981 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
985 /* Clear matrices in window tree rooted in W. If DESIRED_P is
986 non-zero clear desired matrices, otherwise clear current matrices. */
989 clear_window_matrices (struct window
*w
, int desired_p
)
993 if (!NILP (w
->hchild
))
995 xassert (WINDOWP (w
->hchild
));
996 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
998 else if (!NILP (w
->vchild
))
1000 xassert (WINDOWP (w
->vchild
));
1001 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1006 clear_glyph_matrix (w
->desired_matrix
);
1009 clear_glyph_matrix (w
->current_matrix
);
1010 w
->window_end_valid
= Qnil
;
1014 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1020 /***********************************************************************
1023 See dispextern.h for an overall explanation of glyph rows.
1024 ***********************************************************************/
1026 /* Clear glyph row ROW. Do it in a way that makes it robust against
1027 changes in the glyph_row structure, i.e. addition or removal of
1028 structure members. */
1030 static struct glyph_row null_row
;
1033 clear_glyph_row (struct glyph_row
*row
)
1035 struct glyph
*p
[1 + LAST_AREA
];
1037 /* Save pointers. */
1038 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1039 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1040 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1041 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1046 /* Restore pointers. */
1047 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1048 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1049 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1050 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1052 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1053 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1054 Redisplay outputs such glyphs, and flickering effects were
1055 the result. This also depended on the contents of memory
1056 returned by xmalloc. If flickering happens again, activate
1057 the code below. If the flickering is gone with that, chances
1058 are that the flickering has the same reason as here. */
1059 memset (p
[0], 0, (char *) p
[LAST_AREA
] - (char *) p
[0]);
1064 /* Make ROW an empty, enabled row of canonical character height,
1065 in window W starting at y-position Y. */
1068 blank_row (struct window
*w
, struct glyph_row
*row
, int y
)
1072 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1073 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1075 clear_glyph_row (row
);
1077 row
->ascent
= row
->phys_ascent
= 0;
1078 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1079 row
->visible_height
= row
->height
;
1082 row
->visible_height
-= min_y
- row
->y
;
1083 if (row
->y
+ row
->height
> max_y
)
1084 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1090 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1091 are the amounts by which to change positions. Note that the first
1092 glyph of the text area of a row can have a buffer position even if
1093 the used count of the text area is zero. Such rows display line
1097 increment_row_positions (struct glyph_row
*row
, int delta
, int delta_bytes
)
1101 /* Increment start and end positions. */
1102 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1103 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1104 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1105 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1106 CHARPOS (row
->start
.pos
) += delta
;
1107 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1108 CHARPOS (row
->end
.pos
) += delta
;
1109 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1111 if (!row
->enabled_p
)
1114 /* Increment positions in glyphs. */
1115 for (area
= 0; area
< LAST_AREA
; ++area
)
1116 for (i
= 0; i
< row
->used
[area
]; ++i
)
1117 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1118 && row
->glyphs
[area
][i
].charpos
> 0)
1119 row
->glyphs
[area
][i
].charpos
+= delta
;
1121 /* Capture the case of rows displaying a line end. */
1122 if (row
->used
[TEXT_AREA
] == 0
1123 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1124 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1129 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1130 contents, i.e. glyph structure contents are exchanged between A and
1131 B without changing glyph pointers in A and B. */
1134 swap_glyphs_in_rows (a
, b
)
1135 struct glyph_row
*a
, *b
;
1139 for (area
= 0; area
< LAST_AREA
; ++area
)
1141 /* Number of glyphs to swap. */
1142 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1144 /* Start of glyphs in area of row A. */
1145 struct glyph
*glyph_a
= a
->glyphs
[area
];
1147 /* End + 1 of glyphs in area of row A. */
1148 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1150 /* Start of glyphs in area of row B. */
1151 struct glyph
*glyph_b
= b
->glyphs
[area
];
1153 while (glyph_a
< glyph_a_end
)
1155 /* Non-ISO HP/UX compiler doesn't like auto struct
1159 *glyph_a
= *glyph_b
;
1169 /* Exchange pointers to glyph memory between glyph rows A and B. */
1172 swap_glyph_pointers (struct glyph_row
*a
, struct glyph_row
*b
)
1175 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1177 struct glyph
*temp
= a
->glyphs
[i
];
1178 a
->glyphs
[i
] = b
->glyphs
[i
];
1179 b
->glyphs
[i
] = temp
;
1184 /* Copy glyph row structure FROM to glyph row structure TO, except
1185 that glyph pointers in the structures are left unchanged. */
1188 copy_row_except_pointers (struct glyph_row
*to
, struct glyph_row
*from
)
1190 struct glyph
*pointers
[1 + LAST_AREA
];
1192 /* Save glyph pointers of TO. */
1193 memcpy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1195 /* Do a structure assignment. */
1198 /* Restore original pointers of TO. */
1199 memcpy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1203 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1204 TO and FROM are left unchanged. Glyph contents are copied from the
1205 glyph memory of FROM to the glyph memory of TO. Increment buffer
1206 positions in row TO by DELTA/ DELTA_BYTES. */
1209 copy_glyph_row_contents (struct glyph_row
*to
, struct glyph_row
*from
, int delta
, int delta_bytes
)
1213 /* This is like a structure assignment TO = FROM, except that
1214 glyph pointers in the rows are left unchanged. */
1215 copy_row_except_pointers (to
, from
);
1217 /* Copy glyphs from FROM to TO. */
1218 for (area
= 0; area
< LAST_AREA
; ++area
)
1219 if (from
->used
[area
])
1220 memcpy (to
->glyphs
[area
], from
->glyphs
[area
],
1221 from
->used
[area
] * sizeof (struct glyph
));
1223 /* Increment buffer positions in TO by DELTA. */
1224 increment_row_positions (to
, delta
, delta_bytes
);
1228 /* Assign glyph row FROM to glyph row TO. This works like a structure
1229 assignment TO = FROM, except that glyph pointers are not copied but
1230 exchanged between TO and FROM. Pointers must be exchanged to avoid
1234 assign_row (struct glyph_row
*to
, struct glyph_row
*from
)
1236 swap_glyph_pointers (to
, from
);
1237 copy_row_except_pointers (to
, from
);
1241 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1242 a row in a window matrix, is a slice of the glyph memory of the
1243 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1244 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1245 memory of FRAME_ROW. */
1250 glyph_row_slice_p (window_row
, frame_row
)
1251 struct glyph_row
*window_row
, *frame_row
;
1253 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1254 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1255 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1257 return (frame_glyph_start
<= window_glyph_start
1258 && window_glyph_start
< frame_glyph_end
);
1261 #endif /* GLYPH_DEBUG */
1265 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1266 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1267 in WINDOW_MATRIX is found satisfying the condition. */
1269 static struct glyph_row
*
1270 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1271 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1276 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1278 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1279 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1280 frame_matrix
->rows
+ row
))
1283 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1288 /* Prepare ROW for display. Desired rows are cleared lazily,
1289 i.e. they are only marked as to be cleared by setting their
1290 enabled_p flag to zero. When a row is to be displayed, a prior
1291 call to this function really clears it. */
1294 prepare_desired_row (struct glyph_row
*row
)
1296 if (!row
->enabled_p
)
1298 unsigned rp
= row
->reversed_p
;
1300 clear_glyph_row (row
);
1302 row
->reversed_p
= rp
;
1307 /* Return a hash code for glyph row ROW. */
1310 line_hash_code (struct glyph_row
*row
)
1316 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1317 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1321 int c
= glyph
->u
.ch
;
1322 int face_id
= glyph
->face_id
;
1323 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1325 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1326 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1338 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1339 the number of characters in the line. If must_write_spaces is
1340 zero, leading and trailing spaces are ignored. */
1343 line_draw_cost (struct glyph_matrix
*matrix
, int vpos
)
1345 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1346 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1347 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1349 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1350 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1352 /* Ignore trailing and leading spaces if we can. */
1353 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1355 /* Skip from the end over trailing spaces. */
1356 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1359 /* All blank line. */
1363 /* Skip over leading spaces. */
1364 while (CHAR_GLYPH_SPACE_P (*beg
))
1368 /* If we don't have a glyph-table, each glyph is one character,
1369 so return the number of glyphs. */
1370 if (glyph_table_base
== 0)
1374 /* Otherwise, scan the glyphs and accumulate their total length
1381 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1383 if (GLYPH_INVALID_P (g
)
1384 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1387 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1397 /* Test two glyph rows A and B for equality. Value is non-zero if A
1398 and B have equal contents. W is the window to which the glyphs
1399 rows A and B belong. It is needed here to test for partial row
1400 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1401 flags of A and B, too. */
1404 row_equal_p (struct window
*w
, struct glyph_row
*a
, struct glyph_row
*b
, int mouse_face_p
)
1408 else if (a
->hash
!= b
->hash
)
1412 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1415 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1418 /* Compare glyphs. */
1419 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1421 if (a
->used
[area
] != b
->used
[area
])
1424 a_glyph
= a
->glyphs
[area
];
1425 a_end
= a_glyph
+ a
->used
[area
];
1426 b_glyph
= b
->glyphs
[area
];
1428 while (a_glyph
< a_end
1429 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1430 ++a_glyph
, ++b_glyph
;
1432 if (a_glyph
!= a_end
)
1436 if (a
->fill_line_p
!= b
->fill_line_p
1437 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1438 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1439 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1440 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1441 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1442 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1443 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1444 || a
->overlapped_p
!= b
->overlapped_p
1445 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1446 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1447 || a
->reversed_p
!= b
->reversed_p
1448 /* Different partially visible characters on left margin. */
1450 /* Different height. */
1451 || a
->ascent
!= b
->ascent
1452 || a
->phys_ascent
!= b
->phys_ascent
1453 || a
->phys_height
!= b
->phys_height
1454 || a
->visible_height
!= b
->visible_height
)
1463 /***********************************************************************
1466 See dispextern.h for an overall explanation of glyph pools.
1467 ***********************************************************************/
1469 /* Allocate a glyph_pool structure. The structure returned is
1470 initialized with zeros. The global variable glyph_pool_count is
1471 incremented for each pool allocated. */
1473 static struct glyph_pool
*
1474 new_glyph_pool (void)
1476 struct glyph_pool
*result
;
1478 /* Allocate a new glyph_pool and clear it. */
1479 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1480 memset (result
, 0, sizeof *result
);
1482 /* For memory leak and double deletion checking. */
1489 /* Free a glyph_pool structure POOL. The function may be called with
1490 a null POOL pointer. The global variable glyph_pool_count is
1491 decremented with every pool structure freed. If this count gets
1492 negative, more structures were freed than allocated, i.e. one
1493 structure must have been freed more than once or a bogus pointer
1494 was passed to free_glyph_pool. */
1497 free_glyph_pool (struct glyph_pool
*pool
)
1501 /* More freed than allocated? */
1503 xassert (glyph_pool_count
>= 0);
1505 xfree (pool
->glyphs
);
1511 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1512 columns we need. This function never shrinks a pool. The only
1513 case in which this would make sense, would be when a frame's size
1514 is changed from a large value to a smaller one. But, if someone
1515 does it once, we can expect that he will do it again.
1517 Value is non-zero if the pool changed in a way which makes
1518 re-adjusting window glyph matrices necessary. */
1521 realloc_glyph_pool (struct glyph_pool
*pool
, struct dim matrix_dim
)
1526 changed_p
= (pool
->glyphs
== 0
1527 || matrix_dim
.height
!= pool
->nrows
1528 || matrix_dim
.width
!= pool
->ncolumns
);
1530 /* Enlarge the glyph pool. */
1531 needed
= matrix_dim
.width
* matrix_dim
.height
;
1532 if (needed
> pool
->nglyphs
)
1534 int size
= needed
* sizeof (struct glyph
);
1537 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1540 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1541 memset (pool
->glyphs
, 0, size
);
1544 pool
->nglyphs
= needed
;
1547 /* Remember the number of rows and columns because (a) we use them
1548 to do sanity checks, and (b) the number of columns determines
1549 where rows in the frame matrix start---this must be available to
1550 determine pointers to rows of window sub-matrices. */
1551 pool
->nrows
= matrix_dim
.height
;
1552 pool
->ncolumns
= matrix_dim
.width
;
1559 /***********************************************************************
1561 ***********************************************************************/
1566 /* Flush standard output. This is sometimes useful to call from the debugger.
1567 XXX Maybe this should be changed to flush the current terminal instead of
1578 /* Check that no glyph pointers have been lost in MATRIX. If a
1579 pointer has been lost, e.g. by using a structure assignment between
1580 rows, at least one pointer must occur more than once in the rows of
1584 check_matrix_pointer_lossage (matrix
)
1585 struct glyph_matrix
*matrix
;
1589 for (i
= 0; i
< matrix
->nrows
; ++i
)
1590 for (j
= 0; j
< matrix
->nrows
; ++j
)
1592 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1593 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1597 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1600 matrix_row (matrix
, row
)
1601 struct glyph_matrix
*matrix
;
1604 xassert (matrix
&& matrix
->rows
);
1605 xassert (row
>= 0 && row
< matrix
->nrows
);
1607 /* That's really too slow for normal testing because this function
1608 is called almost everywhere. Although---it's still astonishingly
1609 fast, so it is valuable to have for debugging purposes. */
1611 check_matrix_pointer_lossage (matrix
);
1614 return matrix
->rows
+ row
;
1618 #if 0 /* This function makes invalid assumptions when text is
1619 partially invisible. But it might come handy for debugging
1622 /* Check invariants that must hold for an up to date current matrix of
1626 check_matrix_invariants (w
)
1629 struct glyph_matrix
*matrix
= w
->current_matrix
;
1630 int yb
= window_text_bottom_y (w
);
1631 struct glyph_row
*row
= matrix
->rows
;
1632 struct glyph_row
*last_text_row
= NULL
;
1633 struct buffer
*saved
= current_buffer
;
1634 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1637 /* This can sometimes happen for a fresh window. */
1638 if (matrix
->nrows
< 2)
1641 set_buffer_temp (buffer
);
1643 /* Note: last row is always reserved for the mode line. */
1644 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1645 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1647 struct glyph_row
*next
= row
+ 1;
1649 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1650 last_text_row
= row
;
1652 /* Check that character and byte positions are in sync. */
1653 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1654 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1655 xassert (BYTEPOS (row
->start
.pos
)
1656 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1658 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1659 have such a position temporarily in case of a minibuffer
1660 displaying something like `[Sole completion]' at its end. */
1661 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1663 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1664 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1665 xassert (BYTEPOS (row
->end
.pos
)
1666 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1669 /* Check that end position of `row' is equal to start position
1671 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1673 xassert (MATRIX_ROW_END_CHARPOS (row
)
1674 == MATRIX_ROW_START_CHARPOS (next
));
1675 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1676 == MATRIX_ROW_START_BYTEPOS (next
));
1677 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1678 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1683 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1684 xassert (w
->desired_matrix
->rows
!= NULL
);
1685 set_buffer_temp (saved
);
1690 #endif /* GLYPH_DEBUG != 0 */
1694 /**********************************************************************
1695 Allocating/ Adjusting Glyph Matrices
1696 **********************************************************************/
1698 /* Allocate glyph matrices over a window tree for a frame-based
1701 X and Y are column/row within the frame glyph matrix where
1702 sub-matrices for the window tree rooted at WINDOW must be
1703 allocated. DIM_ONLY_P non-zero means that the caller of this
1704 function is only interested in the result matrix dimension, and
1705 matrix adjustments should not be performed.
1707 The function returns the total width/height of the sub-matrices of
1708 the window tree. If called on a frame root window, the computation
1709 will take the mini-buffer window into account.
1711 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1713 NEW_LEAF_MATRIX set if any window in the tree did not have a
1714 glyph matrices yet, and
1716 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1717 any window in the tree will be changed or have been changed (see
1720 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1723 Windows are arranged into chains of windows on the same level
1724 through the next fields of window structures. Such a level can be
1725 either a sequence of horizontally adjacent windows from left to
1726 right, or a sequence of vertically adjacent windows from top to
1727 bottom. Each window in a horizontal sequence can be either a leaf
1728 window or a vertical sequence; a window in a vertical sequence can
1729 be either a leaf or a horizontal sequence. All windows in a
1730 horizontal sequence have the same height, and all windows in a
1731 vertical sequence have the same width.
1733 This function uses, for historical reasons, a more general
1734 algorithm to determine glyph matrix dimensions that would be
1737 The matrix height of a horizontal sequence is determined by the
1738 maximum height of any matrix in the sequence. The matrix width of
1739 a horizontal sequence is computed by adding up matrix widths of
1740 windows in the sequence.
1742 |<------- result width ------->|
1743 +---------+----------+---------+ ---
1746 +---------+ | | result height
1751 The matrix width of a vertical sequence is the maximum matrix width
1752 of any window in the sequence. Its height is computed by adding up
1753 matrix heights of windows in the sequence.
1755 |<---- result width -->|
1763 +------------+---------+ |
1766 +------------+---------+ --- */
1768 /* Bit indicating that a new matrix will be allocated or has been
1771 #define NEW_LEAF_MATRIX (1 << 0)
1773 /* Bit indicating that a matrix will or has changed its location or
1776 #define CHANGED_LEAF_MATRIX (1 << 1)
1779 allocate_matrices_for_frame_redisplay (Lisp_Object window
, int x
, int y
,
1780 int dim_only_p
, int *window_change_flags
)
1782 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1784 int wmax
= 0, hmax
= 0;
1788 int in_horz_combination_p
;
1790 /* What combination is WINDOW part of? Compute this once since the
1791 result is the same for all windows in the `next' chain. The
1792 special case of a root window (parent equal to nil) is treated
1793 like a vertical combination because a root window's `next'
1794 points to the mini-buffer window, if any, which is arranged
1795 vertically below other windows. */
1796 in_horz_combination_p
1797 = (!NILP (XWINDOW (window
)->parent
)
1798 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1800 /* For WINDOW and all windows on the same level. */
1803 w
= XWINDOW (window
);
1805 /* Get the dimension of the window sub-matrix for W, depending
1806 on whether this is a combination or a leaf window. */
1807 if (!NILP (w
->hchild
))
1808 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1810 window_change_flags
);
1811 else if (!NILP (w
->vchild
))
1812 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1814 window_change_flags
);
1817 /* If not already done, allocate sub-matrix structures. */
1818 if (w
->desired_matrix
== NULL
)
1820 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1821 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1822 *window_change_flags
|= NEW_LEAF_MATRIX
;
1825 /* Width and height MUST be chosen so that there are no
1826 holes in the frame matrix. */
1827 dim
.width
= required_matrix_width (w
);
1828 dim
.height
= required_matrix_height (w
);
1830 /* Will matrix be re-allocated? */
1831 if (x
!= w
->desired_matrix
->matrix_x
1832 || y
!= w
->desired_matrix
->matrix_y
1833 || dim
.width
!= w
->desired_matrix
->matrix_w
1834 || dim
.height
!= w
->desired_matrix
->matrix_h
1835 || (margin_glyphs_to_reserve (w
, dim
.width
,
1836 w
->left_margin_cols
)
1837 != w
->desired_matrix
->left_margin_glyphs
)
1838 || (margin_glyphs_to_reserve (w
, dim
.width
,
1839 w
->right_margin_cols
)
1840 != w
->desired_matrix
->right_margin_glyphs
))
1841 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1843 /* Actually change matrices, if allowed. Do not consider
1844 CHANGED_LEAF_MATRIX computed above here because the pool
1845 may have been changed which we don't now here. We trust
1846 that we only will be called with DIM_ONLY_P != 0 when
1850 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1851 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1855 /* If we are part of a horizontal combination, advance x for
1856 windows to the right of W; otherwise advance y for windows
1858 if (in_horz_combination_p
)
1863 /* Remember maximum glyph matrix dimensions. */
1864 wmax
= max (wmax
, dim
.width
);
1865 hmax
= max (hmax
, dim
.height
);
1867 /* Next window on same level. */
1870 while (!NILP (window
));
1872 /* Set `total' to the total glyph matrix dimension of this window
1873 level. In a vertical combination, the width is the width of the
1874 widest window; the height is the y we finally reached, corrected
1875 by the y we started with. In a horizontal combination, the total
1876 height is the height of the tallest window, and the width is the
1877 x we finally reached, corrected by the x we started with. */
1878 if (in_horz_combination_p
)
1880 total
.width
= x
- x0
;
1881 total
.height
= hmax
;
1886 total
.height
= y
- y0
;
1893 /* Return the required height of glyph matrices for window W. */
1896 required_matrix_height (struct window
*w
)
1898 #ifdef HAVE_WINDOW_SYSTEM
1899 struct frame
*f
= XFRAME (w
->frame
);
1901 if (FRAME_WINDOW_P (f
))
1903 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1904 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1905 return (((window_pixel_height
+ ch_height
- 1)
1906 / ch_height
) * w
->nrows_scale_factor
1907 /* One partially visible line at the top and
1908 bottom of the window. */
1910 /* 2 for header and mode line. */
1913 #endif /* HAVE_WINDOW_SYSTEM */
1915 return WINDOW_TOTAL_LINES (w
);
1919 /* Return the required width of glyph matrices for window W. */
1922 required_matrix_width (struct window
*w
)
1924 #ifdef HAVE_WINDOW_SYSTEM
1925 struct frame
*f
= XFRAME (w
->frame
);
1926 if (FRAME_WINDOW_P (f
))
1928 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1929 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1931 /* Compute number of glyphs needed in a glyph row. */
1932 return (((window_pixel_width
+ ch_width
- 1)
1933 / ch_width
) * w
->ncols_scale_factor
1934 /* 2 partially visible columns in the text area. */
1936 /* One partially visible column at the right
1937 edge of each marginal area. */
1940 #endif /* HAVE_WINDOW_SYSTEM */
1942 return XINT (w
->total_cols
);
1946 /* Allocate window matrices for window-based redisplay. W is the
1947 window whose matrices must be allocated/reallocated. */
1950 allocate_matrices_for_window_redisplay (struct window
*w
)
1954 if (!NILP (w
->vchild
))
1955 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
1956 else if (!NILP (w
->hchild
))
1957 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
1960 /* W is a leaf window. */
1963 /* If matrices are not yet allocated, allocate them now. */
1964 if (w
->desired_matrix
== NULL
)
1966 w
->desired_matrix
= new_glyph_matrix (NULL
);
1967 w
->current_matrix
= new_glyph_matrix (NULL
);
1970 dim
.width
= required_matrix_width (w
);
1971 dim
.height
= required_matrix_height (w
);
1972 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1973 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1976 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1981 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1982 do it for all frames; otherwise do it just for the given frame.
1983 This function must be called when a new frame is created, its size
1984 changes, or its window configuration changes. */
1987 adjust_glyphs (struct frame
*f
)
1989 /* Block input so that expose events and other events that access
1990 glyph matrices are not processed while we are changing them. */
1994 adjust_frame_glyphs (f
);
1997 Lisp_Object tail
, lisp_frame
;
1999 FOR_EACH_FRAME (tail
, lisp_frame
)
2000 adjust_frame_glyphs (XFRAME (lisp_frame
));
2007 /* Adjust frame glyphs when Emacs is initialized.
2009 To be called from init_display.
2011 We need a glyph matrix because redraw will happen soon.
2012 Unfortunately, window sizes on selected_frame are not yet set to
2013 meaningful values. I believe we can assume that there are only two
2014 windows on the frame---the mini-buffer and the root window. Frame
2015 height and width seem to be correct so far. So, set the sizes of
2016 windows to estimated values. */
2019 adjust_frame_glyphs_initially (void)
2021 struct frame
*sf
= SELECTED_FRAME ();
2022 struct window
*root
= XWINDOW (sf
->root_window
);
2023 struct window
*mini
= XWINDOW (root
->next
);
2024 int frame_lines
= FRAME_LINES (sf
);
2025 int frame_cols
= FRAME_COLS (sf
);
2026 int top_margin
= FRAME_TOP_MARGIN (sf
);
2028 /* Do it for the root window. */
2029 XSETFASTINT (root
->top_line
, top_margin
);
2030 XSETFASTINT (root
->total_cols
, frame_cols
);
2031 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2033 /* Do it for the mini-buffer window. */
2034 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2035 XSETFASTINT (mini
->total_cols
, frame_cols
);
2036 set_window_height (root
->next
, 1, 0);
2038 adjust_frame_glyphs (sf
);
2039 glyphs_initialized_initially_p
= 1;
2043 /* Allocate/reallocate glyph matrices of a single frame F. */
2046 adjust_frame_glyphs (struct frame
*f
)
2048 if (FRAME_WINDOW_P (f
))
2049 adjust_frame_glyphs_for_window_redisplay (f
);
2051 adjust_frame_glyphs_for_frame_redisplay (f
);
2053 /* Don't forget the message buffer and the buffer for
2054 decode_mode_spec. */
2055 adjust_frame_message_buffer (f
);
2056 adjust_decode_mode_spec_buffer (f
);
2058 f
->glyphs_initialized_p
= 1;
2061 /* Return 1 if any window in the tree has nonzero window margins. See
2062 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2064 showing_window_margins_p (struct window
*w
)
2068 if (!NILP (w
->hchild
))
2070 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2073 else if (!NILP (w
->vchild
))
2075 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2078 else if (!NILP (w
->left_margin_cols
)
2079 || !NILP (w
->right_margin_cols
))
2082 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2088 /* In the window tree with root W, build current matrices of leaf
2089 windows from the frame's current matrix. */
2092 fake_current_matrices (Lisp_Object window
)
2096 for (; !NILP (window
); window
= w
->next
)
2098 w
= XWINDOW (window
);
2100 if (!NILP (w
->hchild
))
2101 fake_current_matrices (w
->hchild
);
2102 else if (!NILP (w
->vchild
))
2103 fake_current_matrices (w
->vchild
);
2107 struct frame
*f
= XFRAME (w
->frame
);
2108 struct glyph_matrix
*m
= w
->current_matrix
;
2109 struct glyph_matrix
*fm
= f
->current_matrix
;
2111 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2112 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2114 for (i
= 0; i
< m
->matrix_h
; ++i
)
2116 struct glyph_row
*r
= m
->rows
+ i
;
2117 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2119 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2120 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2122 r
->enabled_p
= fr
->enabled_p
;
2125 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2126 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2127 r
->used
[TEXT_AREA
] = (m
->matrix_w
2128 - r
->used
[LEFT_MARGIN_AREA
]
2129 - r
->used
[RIGHT_MARGIN_AREA
]);
2138 /* Save away the contents of frame F's current frame matrix. Value is
2139 a glyph matrix holding the contents of F's current frame matrix. */
2141 static struct glyph_matrix
*
2142 save_current_matrix (struct frame
*f
)
2145 struct glyph_matrix
*saved
;
2147 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2148 memset (saved
, 0, sizeof *saved
);
2149 saved
->nrows
= f
->current_matrix
->nrows
;
2150 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2151 * sizeof *saved
->rows
);
2152 memset (saved
->rows
, 0, saved
->nrows
* sizeof *saved
->rows
);
2154 for (i
= 0; i
< saved
->nrows
; ++i
)
2156 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2157 struct glyph_row
*to
= saved
->rows
+ i
;
2158 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2159 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2160 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2161 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2168 /* Restore the contents of frame F's current frame matrix from SAVED,
2169 and free memory associated with SAVED. */
2172 restore_current_matrix (struct frame
*f
, struct glyph_matrix
*saved
)
2176 for (i
= 0; i
< saved
->nrows
; ++i
)
2178 struct glyph_row
*from
= saved
->rows
+ i
;
2179 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2180 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2181 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2182 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2183 xfree (from
->glyphs
[TEXT_AREA
]);
2186 xfree (saved
->rows
);
2192 /* Allocate/reallocate glyph matrices of a single frame F for
2193 frame-based redisplay. */
2196 adjust_frame_glyphs_for_frame_redisplay (struct frame
*f
)
2198 struct dim matrix_dim
;
2200 int window_change_flags
;
2203 if (!FRAME_LIVE_P (f
))
2206 top_window_y
= FRAME_TOP_MARGIN (f
);
2208 /* Allocate glyph pool structures if not already done. */
2209 if (f
->desired_pool
== NULL
)
2211 f
->desired_pool
= new_glyph_pool ();
2212 f
->current_pool
= new_glyph_pool ();
2215 /* Allocate frames matrix structures if needed. */
2216 if (f
->desired_matrix
== NULL
)
2218 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2219 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2222 /* Compute window glyph matrices. (This takes the mini-buffer
2223 window into account). The result is the size of the frame glyph
2224 matrix needed. The variable window_change_flags is set to a bit
2225 mask indicating whether new matrices will be allocated or
2226 existing matrices change their size or location within the frame
2228 window_change_flags
= 0;
2230 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2233 &window_change_flags
);
2235 /* Add in menu bar lines, if any. */
2236 matrix_dim
.height
+= top_window_y
;
2238 /* Enlarge pools as necessary. */
2239 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2240 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2242 /* Set up glyph pointers within window matrices. Do this only if
2243 absolutely necessary since it requires a frame redraw. */
2244 if (pool_changed_p
|| window_change_flags
)
2246 /* Do it for window matrices. */
2247 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2249 &window_change_flags
);
2251 /* Size of frame matrices must equal size of frame. Note
2252 that we are called for X frames with window widths NOT equal
2253 to the frame width (from CHANGE_FRAME_SIZE_1). */
2254 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2255 && matrix_dim
.height
== FRAME_LINES (f
));
2257 /* Pointers to glyph memory in glyph rows are exchanged during
2258 the update phase of redisplay, which means in general that a
2259 frame's current matrix consists of pointers into both the
2260 desired and current glyph pool of the frame. Adjusting a
2261 matrix sets the frame matrix up so that pointers are all into
2262 the same pool. If we want to preserve glyph contents of the
2263 current matrix over a call to adjust_glyph_matrix, we must
2264 make a copy of the current glyphs, and restore the current
2265 matrix' contents from that copy. */
2266 if (display_completed
2267 && !FRAME_GARBAGED_P (f
)
2268 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2269 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2270 /* For some reason, the frame glyph matrix gets corrupted if
2271 any of the windows contain margins. I haven't been able
2272 to hunt down the reason, but for the moment this prevents
2273 the problem from manifesting. -- cyd */
2274 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2276 struct glyph_matrix
*copy
= save_current_matrix (f
);
2277 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2278 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2279 restore_current_matrix (f
, copy
);
2280 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2284 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2285 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2286 SET_FRAME_GARBAGED (f
);
2292 /* Allocate/reallocate glyph matrices of a single frame F for
2293 window-based redisplay. */
2296 adjust_frame_glyphs_for_window_redisplay (struct frame
*f
)
2300 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2302 /* Allocate/reallocate window matrices. */
2303 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2305 #ifdef HAVE_X_WINDOWS
2306 /* Allocate/ reallocate matrices of the dummy window used to display
2307 the menu bar under X when no X toolkit support is available. */
2308 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2310 /* Allocate a dummy window if not already done. */
2311 if (NILP (f
->menu_bar_window
))
2313 f
->menu_bar_window
= make_window ();
2314 w
= XWINDOW (f
->menu_bar_window
);
2315 XSETFRAME (w
->frame
, f
);
2316 w
->pseudo_window_p
= 1;
2319 w
= XWINDOW (f
->menu_bar_window
);
2321 /* Set window dimensions to frame dimensions and allocate or
2322 adjust glyph matrices of W. */
2323 XSETFASTINT (w
->top_line
, 0);
2324 XSETFASTINT (w
->left_col
, 0);
2325 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2326 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2327 allocate_matrices_for_window_redisplay (w
);
2329 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2330 #endif /* HAVE_X_WINDOWS */
2333 /* Allocate/ reallocate matrices of the tool bar window. If we
2334 don't have a tool bar window yet, make one. */
2335 if (NILP (f
->tool_bar_window
))
2337 f
->tool_bar_window
= make_window ();
2338 w
= XWINDOW (f
->tool_bar_window
);
2339 XSETFRAME (w
->frame
, f
);
2340 w
->pseudo_window_p
= 1;
2343 w
= XWINDOW (f
->tool_bar_window
);
2345 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2346 XSETFASTINT (w
->left_col
, 0);
2347 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2348 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2349 allocate_matrices_for_window_redisplay (w
);
2354 /* Adjust/ allocate message buffer of frame F.
2356 Note that the message buffer is never freed. Since I could not
2357 find a free in 19.34, I assume that freeing it would be
2358 problematic in some way and don't do it either.
2360 (Implementation note: It should be checked if we can free it
2361 eventually without causing trouble). */
2364 adjust_frame_message_buffer (struct frame
*f
)
2366 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2368 if (FRAME_MESSAGE_BUF (f
))
2370 char *buffer
= FRAME_MESSAGE_BUF (f
);
2371 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2372 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2375 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2379 /* Re-allocate buffer for decode_mode_spec on frame F. */
2382 adjust_decode_mode_spec_buffer (struct frame
*f
)
2384 f
->decode_mode_spec_buffer
2385 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2386 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2391 /**********************************************************************
2392 Freeing Glyph Matrices
2393 **********************************************************************/
2395 /* Free glyph memory for a frame F. F may be null. This function can
2396 be called for the same frame more than once. The root window of
2397 F may be nil when this function is called. This is the case when
2398 the function is called when F is destroyed. */
2401 free_glyphs (struct frame
*f
)
2403 if (f
&& f
->glyphs_initialized_p
)
2405 /* Block interrupt input so that we don't get surprised by an X
2406 event while we're in an inconsistent state. */
2408 f
->glyphs_initialized_p
= 0;
2410 /* Release window sub-matrices. */
2411 if (!NILP (f
->root_window
))
2412 free_window_matrices (XWINDOW (f
->root_window
));
2414 /* Free the dummy window for menu bars without X toolkit and its
2416 if (!NILP (f
->menu_bar_window
))
2418 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2419 free_glyph_matrix (w
->desired_matrix
);
2420 free_glyph_matrix (w
->current_matrix
);
2421 w
->desired_matrix
= w
->current_matrix
= NULL
;
2422 f
->menu_bar_window
= Qnil
;
2425 /* Free the tool bar window and its glyph matrices. */
2426 if (!NILP (f
->tool_bar_window
))
2428 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2429 free_glyph_matrix (w
->desired_matrix
);
2430 free_glyph_matrix (w
->current_matrix
);
2431 w
->desired_matrix
= w
->current_matrix
= NULL
;
2432 f
->tool_bar_window
= Qnil
;
2435 /* Release frame glyph matrices. Reset fields to zero in
2436 case we are called a second time. */
2437 if (f
->desired_matrix
)
2439 free_glyph_matrix (f
->desired_matrix
);
2440 free_glyph_matrix (f
->current_matrix
);
2441 f
->desired_matrix
= f
->current_matrix
= NULL
;
2444 /* Release glyph pools. */
2445 if (f
->desired_pool
)
2447 free_glyph_pool (f
->desired_pool
);
2448 free_glyph_pool (f
->current_pool
);
2449 f
->desired_pool
= f
->current_pool
= NULL
;
2457 /* Free glyph sub-matrices in the window tree rooted at W. This
2458 function may be called with a null pointer, and it may be called on
2459 the same tree more than once. */
2462 free_window_matrices (struct window
*w
)
2466 if (!NILP (w
->hchild
))
2467 free_window_matrices (XWINDOW (w
->hchild
));
2468 else if (!NILP (w
->vchild
))
2469 free_window_matrices (XWINDOW (w
->vchild
));
2472 /* This is a leaf window. Free its memory and reset fields
2473 to zero in case this function is called a second time for
2475 free_glyph_matrix (w
->current_matrix
);
2476 free_glyph_matrix (w
->desired_matrix
);
2477 w
->current_matrix
= w
->desired_matrix
= NULL
;
2480 /* Next window on same level. */
2481 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2486 /* Check glyph memory leaks. This function is called from
2487 shut_down_emacs. Note that frames are not destroyed when Emacs
2488 exits. We therefore free all glyph memory for all active frames
2489 explicitly and check that nothing is left allocated. */
2492 check_glyph_memory (void)
2494 Lisp_Object tail
, frame
;
2496 /* Free glyph memory for all frames. */
2497 FOR_EACH_FRAME (tail
, frame
)
2498 free_glyphs (XFRAME (frame
));
2500 /* Check that nothing is left allocated. */
2501 if (glyph_matrix_count
)
2503 if (glyph_pool_count
)
2509 /**********************************************************************
2510 Building a Frame Matrix
2511 **********************************************************************/
2513 /* Most of the redisplay code works on glyph matrices attached to
2514 windows. This is a good solution most of the time, but it is not
2515 suitable for terminal code. Terminal output functions cannot rely
2516 on being able to set an arbitrary terminal window. Instead they
2517 must be provided with a view of the whole frame, i.e. the whole
2518 screen. We build such a view by constructing a frame matrix from
2519 window matrices in this section.
2521 Windows that must be updated have their must_be_update_p flag set.
2522 For all such windows, their desired matrix is made part of the
2523 desired frame matrix. For other windows, their current matrix is
2524 made part of the desired frame matrix.
2526 +-----------------+----------------+
2527 | desired | desired |
2529 +-----------------+----------------+
2532 +----------------------------------+
2534 Desired window matrices can be made part of the frame matrix in a
2535 cheap way: We exploit the fact that the desired frame matrix and
2536 desired window matrices share their glyph memory. This is not
2537 possible for current window matrices. Their glyphs are copied to
2538 the desired frame matrix. The latter is equivalent to
2539 preserve_other_columns in the old redisplay.
2541 Used glyphs counters for frame matrix rows are the result of adding
2542 up glyph lengths of the window matrices. A line in the frame
2543 matrix is enabled, if a corresponding line in a window matrix is
2546 After building the desired frame matrix, it will be passed to
2547 terminal code, which will manipulate both the desired and current
2548 frame matrix. Changes applied to the frame's current matrix have
2549 to be visible in current window matrices afterwards, of course.
2551 This problem is solved like this:
2553 1. Window and frame matrices share glyphs. Window matrices are
2554 constructed in a way that their glyph contents ARE the glyph
2555 contents needed in a frame matrix. Thus, any modification of
2556 glyphs done in terminal code will be reflected in window matrices
2559 2. Exchanges of rows in a frame matrix done by terminal code are
2560 intercepted by hook functions so that corresponding row operations
2561 on window matrices can be performed. This is necessary because we
2562 use pointers to glyphs in glyph row structures. To satisfy the
2563 assumption of point 1 above that glyphs are updated implicitly in
2564 window matrices when they are manipulated via the frame matrix,
2565 window and frame matrix must of course agree where to find the
2566 glyphs for their rows. Possible manipulations that must be
2567 mirrored are assignments of rows of the desired frame matrix to the
2568 current frame matrix and scrolling the current frame matrix. */
2570 /* Build frame F's desired matrix from window matrices. Only windows
2571 which have the flag must_be_updated_p set have to be updated. Menu
2572 bar lines of a frame are not covered by window matrices, so make
2573 sure not to touch them in this function. */
2576 build_frame_matrix (struct frame
*f
)
2580 /* F must have a frame matrix when this function is called. */
2581 xassert (!FRAME_WINDOW_P (f
));
2583 /* Clear all rows in the frame matrix covered by window matrices.
2584 Menu bar lines are not covered by windows. */
2585 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2586 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2588 /* Build the matrix by walking the window tree. */
2589 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2590 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2594 /* Walk a window tree, building a frame matrix MATRIX from window
2595 matrices. W is the root of a window tree. */
2598 build_frame_matrix_from_window_tree (struct glyph_matrix
*matrix
, struct window
*w
)
2602 if (!NILP (w
->hchild
))
2603 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2604 else if (!NILP (w
->vchild
))
2605 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2607 build_frame_matrix_from_leaf_window (matrix
, w
);
2609 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2614 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2615 desired frame matrix built. W is a leaf window whose desired or
2616 current matrix is to be added to FRAME_MATRIX. W's flag
2617 must_be_updated_p determines which matrix it contributes to
2618 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2619 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2620 Adding a desired matrix means setting up used counters and such in
2621 frame rows, while adding a current window matrix to FRAME_MATRIX
2622 means copying glyphs. The latter case corresponds to
2623 preserve_other_columns in the old redisplay. */
2626 build_frame_matrix_from_leaf_window (struct glyph_matrix
*frame_matrix
, struct window
*w
)
2628 struct glyph_matrix
*window_matrix
;
2629 int window_y
, frame_y
;
2630 /* If non-zero, a glyph to insert at the right border of W. */
2631 GLYPH right_border_glyph
;
2633 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2635 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2636 if (w
->must_be_updated_p
)
2638 window_matrix
= w
->desired_matrix
;
2640 /* Decide whether we want to add a vertical border glyph. */
2641 if (!WINDOW_RIGHTMOST_P (w
))
2643 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2646 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2648 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2649 && GLYPH_CODE_CHAR_VALID_P (gc
))
2651 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2652 spec_glyph_lookup_face (w
, &right_border_glyph
);
2655 if (GLYPH_FACE (right_border_glyph
) <= 0)
2656 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2660 window_matrix
= w
->current_matrix
;
2662 /* For all rows in the window matrix and corresponding rows in the
2665 frame_y
= window_matrix
->matrix_y
;
2666 while (window_y
< window_matrix
->nrows
)
2668 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2669 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2670 int current_row_p
= window_matrix
== w
->current_matrix
;
2672 /* Fill up the frame row with spaces up to the left margin of the
2674 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2676 /* Fill up areas in the window matrix row with spaces. */
2677 fill_up_glyph_row_with_spaces (window_row
);
2679 /* If only part of W's desired matrix has been built, and
2680 window_row wasn't displayed, use the corresponding current
2682 if (window_matrix
== w
->desired_matrix
2683 && !window_row
->enabled_p
)
2685 window_row
= w
->current_matrix
->rows
+ window_y
;
2691 /* Copy window row to frame row. */
2692 memcpy (frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2693 window_row
->glyphs
[0],
2694 window_matrix
->matrix_w
* sizeof (struct glyph
));
2698 xassert (window_row
->enabled_p
);
2700 /* Only when a desired row has been displayed, we want
2701 the corresponding frame row to be updated. */
2702 frame_row
->enabled_p
= 1;
2704 /* Maybe insert a vertical border between horizontally adjacent
2706 if (GLYPH_CHAR (right_border_glyph
) != 0)
2708 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2709 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2713 /* Window row window_y must be a slice of frame row
2715 xassert (glyph_row_slice_p (window_row
, frame_row
));
2717 /* If rows are in sync, we don't have to copy glyphs because
2718 frame and window share glyphs. */
2720 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2721 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2725 /* Set number of used glyphs in the frame matrix. Since we fill
2726 up with spaces, and visit leaf windows from left to right it
2727 can be done simply. */
2728 frame_row
->used
[TEXT_AREA
]
2729 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2737 /* Given a user-specified glyph, possibly including a Lisp-level face
2738 ID, return a glyph that has a realized face ID.
2739 This is used for glyphs displayed specially and not part of the text;
2740 for instance, vertical separators, truncation markers, etc. */
2743 spec_glyph_lookup_face (struct window
*w
, GLYPH
*glyph
)
2745 int lface_id
= GLYPH_FACE (*glyph
);
2746 /* Convert the glyph's specified face to a realized (cache) face. */
2749 int face_id
= merge_faces (XFRAME (w
->frame
),
2750 Qt
, lface_id
, DEFAULT_FACE_ID
);
2751 SET_GLYPH_FACE (*glyph
, face_id
);
2755 /* Add spaces to a glyph row ROW in a window matrix.
2757 Each row has the form:
2759 +---------+-----------------------------+------------+
2760 | left | text | right |
2761 +---------+-----------------------------+------------+
2763 Left and right marginal areas are optional. This function adds
2764 spaces to areas so that there are no empty holes between areas.
2765 In other words: If the right area is not empty, the text area
2766 is filled up with spaces up to the right area. If the text area
2767 is not empty, the left area is filled up.
2769 To be called for frame-based redisplay, only. */
2772 fill_up_glyph_row_with_spaces (struct glyph_row
*row
)
2774 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2775 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2776 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2780 /* Fill area AREA of glyph row ROW with spaces. To be called for
2781 frame-based redisplay only. */
2784 fill_up_glyph_row_area_with_spaces (struct glyph_row
*row
, int area
)
2786 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2788 struct glyph
*end
= row
->glyphs
[area
+ 1];
2789 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2792 *text
++ = space_glyph
;
2793 row
->used
[area
] = text
- row
->glyphs
[area
];
2798 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2799 reached. In frame matrices only one area, TEXT_AREA, is used. */
2802 fill_up_frame_row_with_spaces (struct glyph_row
*row
, int upto
)
2804 int i
= row
->used
[TEXT_AREA
];
2805 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2808 glyph
[i
++] = space_glyph
;
2810 row
->used
[TEXT_AREA
] = i
;
2815 /**********************************************************************
2816 Mirroring operations on frame matrices in window matrices
2817 **********************************************************************/
2819 /* Set frame being updated via frame-based redisplay to F. This
2820 function must be called before updates to make explicit that we are
2821 working on frame matrices or not. */
2824 set_frame_matrix_frame (struct frame
*f
)
2826 frame_matrix_frame
= f
;
2830 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2831 DESIRED_MATRIX is the desired matrix corresponding to
2832 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2833 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2834 frame_matrix_frame is non-null, this indicates that the exchange is
2835 done in frame matrices, and that we have to perform analogous
2836 operations in window matrices of frame_matrix_frame. */
2839 make_current (struct glyph_matrix
*desired_matrix
, struct glyph_matrix
*current_matrix
, int row
)
2841 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2842 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2843 int mouse_face_p
= current_row
->mouse_face_p
;
2845 /* Do current_row = desired_row. This exchanges glyph pointers
2846 between both rows, and does a structure assignment otherwise. */
2847 assign_row (current_row
, desired_row
);
2849 /* Enable current_row to mark it as valid. */
2850 current_row
->enabled_p
= 1;
2851 current_row
->mouse_face_p
= mouse_face_p
;
2853 /* If we are called on frame matrices, perform analogous operations
2854 for window matrices. */
2855 if (frame_matrix_frame
)
2856 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2860 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2861 W's frame which has been made current (by swapping pointers between
2862 current and desired matrix). Perform analogous operations in the
2863 matrices of leaf windows in the window tree rooted at W. */
2866 mirror_make_current (struct window
*w
, int frame_row
)
2870 if (!NILP (w
->hchild
))
2871 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2872 else if (!NILP (w
->vchild
))
2873 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2876 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2877 here because the checks performed in debug mode there
2878 will not allow the conversion. */
2879 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2881 /* If FRAME_ROW is within W, assign the desired row to the
2882 current row (exchanging glyph pointers). */
2883 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2885 struct glyph_row
*current_row
2886 = MATRIX_ROW (w
->current_matrix
, row
);
2887 struct glyph_row
*desired_row
2888 = MATRIX_ROW (w
->desired_matrix
, row
);
2890 if (desired_row
->enabled_p
)
2891 assign_row (current_row
, desired_row
);
2893 swap_glyph_pointers (desired_row
, current_row
);
2894 current_row
->enabled_p
= 1;
2898 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2903 /* Perform row dance after scrolling. We are working on the range of
2904 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2905 including) in MATRIX. COPY_FROM is a vector containing, for each
2906 row I in the range 0 <= I < NLINES, the index of the original line
2907 to move to I. This index is relative to the row range, i.e. 0 <=
2908 index < NLINES. RETAINED_P is a vector containing zero for each
2909 row 0 <= I < NLINES which is empty.
2911 This function is called from do_scrolling and do_direct_scrolling. */
2914 mirrored_line_dance (struct glyph_matrix
*matrix
, int unchanged_at_top
, int nlines
,
2915 int *copy_from
, char *retained_p
)
2917 /* A copy of original rows. */
2918 struct glyph_row
*old_rows
;
2920 /* Rows to assign to. */
2921 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2925 /* Make a copy of the original rows. */
2926 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2927 memcpy (old_rows
, new_rows
, nlines
* sizeof *old_rows
);
2929 /* Assign new rows, maybe clear lines. */
2930 for (i
= 0; i
< nlines
; ++i
)
2932 int enabled_before_p
= new_rows
[i
].enabled_p
;
2934 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2935 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2936 new_rows
[i
] = old_rows
[copy_from
[i
]];
2937 new_rows
[i
].enabled_p
= enabled_before_p
;
2939 /* RETAINED_P is zero for empty lines. */
2940 if (!retained_p
[copy_from
[i
]])
2941 new_rows
[i
].enabled_p
= 0;
2944 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2945 if (frame_matrix_frame
)
2946 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2947 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2951 /* Synchronize glyph pointers in the current matrix of window W with
2952 the current frame matrix. */
2955 sync_window_with_frame_matrix_rows (struct window
*w
)
2957 struct frame
*f
= XFRAME (w
->frame
);
2958 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2959 int left
, right
, x
, width
;
2961 /* Preconditions: W must be a leaf window on a tty frame. */
2962 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2963 xassert (!FRAME_WINDOW_P (f
));
2965 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
2966 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
2967 x
= w
->current_matrix
->matrix_x
;
2968 width
= w
->current_matrix
->matrix_w
;
2970 window_row
= w
->current_matrix
->rows
;
2971 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2972 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
2974 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
2976 window_row
->glyphs
[LEFT_MARGIN_AREA
]
2977 = frame_row
->glyphs
[0] + x
;
2978 window_row
->glyphs
[TEXT_AREA
]
2979 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
2980 window_row
->glyphs
[LAST_AREA
]
2981 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
2982 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
2983 = window_row
->glyphs
[LAST_AREA
] - right
;
2988 /* Return the window in the window tree rooted in W containing frame
2989 row ROW. Value is null if none is found. */
2992 frame_row_to_window (struct window
*w
, int row
)
2994 struct window
*found
= NULL
;
2998 if (!NILP (w
->hchild
))
2999 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3000 else if (!NILP (w
->vchild
))
3001 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3002 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3003 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3006 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3013 /* Perform a line dance in the window tree rooted at W, after
3014 scrolling a frame matrix in mirrored_line_dance.
3016 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3017 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3018 COPY_FROM is a vector containing, for each row I in the range 0 <=
3019 I < NLINES, the index of the original line to move to I. This
3020 index is relative to the row range, i.e. 0 <= index < NLINES.
3021 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3025 mirror_line_dance (struct window
*w
, int unchanged_at_top
, int nlines
, int *copy_from
, char *retained_p
)
3029 if (!NILP (w
->hchild
))
3030 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3031 nlines
, copy_from
, retained_p
);
3032 else if (!NILP (w
->vchild
))
3033 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3034 nlines
, copy_from
, retained_p
);
3037 /* W is a leaf window, and we are working on its current
3039 struct glyph_matrix
*m
= w
->current_matrix
;
3041 struct glyph_row
*old_rows
;
3043 /* Make a copy of the original rows of matrix m. */
3044 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3045 memcpy (old_rows
, m
->rows
, m
->nrows
* sizeof *old_rows
);
3047 for (i
= 0; i
< nlines
; ++i
)
3049 /* Frame relative line assigned to. */
3050 int frame_to
= i
+ unchanged_at_top
;
3052 /* Frame relative line assigned. */
3053 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3055 /* Window relative line assigned to. */
3056 int window_to
= frame_to
- m
->matrix_y
;
3058 /* Window relative line assigned. */
3059 int window_from
= frame_from
- m
->matrix_y
;
3061 /* Is assigned line inside window? */
3062 int from_inside_window_p
3063 = window_from
>= 0 && window_from
< m
->matrix_h
;
3065 /* Is assigned to line inside window? */
3066 int to_inside_window_p
3067 = window_to
>= 0 && window_to
< m
->matrix_h
;
3069 if (from_inside_window_p
&& to_inside_window_p
)
3071 /* Enabled setting before assignment. */
3072 int enabled_before_p
;
3074 /* Do the assignment. The enabled_p flag is saved
3075 over the assignment because the old redisplay did
3077 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3078 m
->rows
[window_to
] = old_rows
[window_from
];
3079 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3081 /* If frame line is empty, window line is empty, too. */
3082 if (!retained_p
[copy_from
[i
]])
3083 m
->rows
[window_to
].enabled_p
= 0;
3085 else if (to_inside_window_p
)
3087 /* A copy between windows. This is an infrequent
3088 case not worth optimizing. */
3089 struct frame
*f
= XFRAME (w
->frame
);
3090 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3092 struct glyph_matrix
*m2
;
3095 w2
= frame_row_to_window (root
, frame_from
);
3096 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3097 -nw', FROM_FRAME sometimes has no associated window.
3098 This check avoids a segfault if W2 is null. */
3101 m2
= w2
->current_matrix
;
3102 m2_from
= frame_from
- m2
->matrix_y
;
3103 copy_row_except_pointers (m
->rows
+ window_to
,
3104 m2
->rows
+ m2_from
);
3106 /* If frame line is empty, window line is empty, too. */
3107 if (!retained_p
[copy_from
[i
]])
3108 m
->rows
[window_to
].enabled_p
= 0;
3112 else if (from_inside_window_p
)
3116 /* If there was a copy between windows, make sure glyph
3117 pointers are in sync with the frame matrix. */
3119 sync_window_with_frame_matrix_rows (w
);
3121 /* Check that no pointers are lost. */
3125 /* Next window on same level. */
3126 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3133 /* Check that window and frame matrices agree about their
3134 understanding where glyphs of the rows are to find. For each
3135 window in the window tree rooted at W, check that rows in the
3136 matrices of leaf window agree with their frame matrices about
3140 check_window_matrix_pointers (w
)
3145 if (!NILP (w
->hchild
))
3146 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3147 else if (!NILP (w
->vchild
))
3148 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3151 struct frame
*f
= XFRAME (w
->frame
);
3152 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3153 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3156 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3161 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3162 a window and FRAME_MATRIX is the corresponding frame matrix. For
3163 each row in WINDOW_MATRIX check that it's a slice of the
3164 corresponding frame row. If it isn't, abort. */
3167 check_matrix_pointers (window_matrix
, frame_matrix
)
3168 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3170 /* Row number in WINDOW_MATRIX. */
3173 /* Row number corresponding to I in FRAME_MATRIX. */
3174 int j
= window_matrix
->matrix_y
;
3176 /* For all rows check that the row in the window matrix is a
3177 slice of the row in the frame matrix. If it isn't we didn't
3178 mirror an operation on the frame matrix correctly. */
3179 while (i
< window_matrix
->nrows
)
3181 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3182 frame_matrix
->rows
+ j
))
3188 #endif /* GLYPH_DEBUG != 0 */
3192 /**********************************************************************
3193 VPOS and HPOS translations
3194 **********************************************************************/
3198 /* Translate vertical position VPOS which is relative to window W to a
3199 vertical position relative to W's frame. */
3202 window_to_frame_vpos (w
, vpos
)
3206 struct frame
*f
= XFRAME (w
->frame
);
3208 xassert (!FRAME_WINDOW_P (f
));
3209 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3210 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3211 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3216 /* Translate horizontal position HPOS which is relative to window W to
3217 a horizontal position relative to W's frame. */
3220 window_to_frame_hpos (w
, hpos
)
3224 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3225 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3229 #endif /* GLYPH_DEBUG */
3233 /**********************************************************************
3235 **********************************************************************/
3237 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3238 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3243 CHECK_LIVE_FRAME (frame
);
3246 /* Ignore redraw requests, if frame has no glyphs yet.
3247 (Implementation note: It still has to be checked why we are
3248 called so early here). */
3249 if (!glyphs_initialized_initially_p
)
3254 if (FRAME_MSDOS_P (f
))
3255 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3258 clear_current_matrices (f
);
3260 if (FRAME_TERMCAP_P (f
))
3261 fflush (FRAME_TTY (f
)->output
);
3262 windows_or_buffers_changed
++;
3263 /* Mark all windows as inaccurate, so that every window will have
3264 its redisplay done. */
3265 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3266 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3272 /* Redraw frame F. This is nothing more than a call to the Lisp
3273 function redraw-frame. */
3276 redraw_frame (struct frame
*f
)
3279 XSETFRAME (frame
, f
);
3280 Fredraw_frame (frame
);
3284 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3285 doc
: /* Clear and redisplay all visible frames. */)
3288 Lisp_Object tail
, frame
;
3290 FOR_EACH_FRAME (tail
, frame
)
3291 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3292 Fredraw_frame (frame
);
3298 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3299 visible frames marked as garbaged. */
3302 redraw_garbaged_frames (void)
3304 Lisp_Object tail
, frame
;
3306 FOR_EACH_FRAME (tail
, frame
)
3307 if (FRAME_VISIBLE_P (XFRAME (frame
))
3308 && FRAME_GARBAGED_P (XFRAME (frame
)))
3309 Fredraw_frame (frame
);
3314 /***********************************************************************
3316 ***********************************************************************/
3318 /* Update frame F based on the data in desired matrices.
3320 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3321 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3324 Value is non-zero if redisplay was stopped due to pending input. */
3327 update_frame (struct frame
*f
, int force_p
, int inhibit_hairy_id_p
)
3329 /* 1 means display has been paused because of pending input. */
3331 struct window
*root_window
= XWINDOW (f
->root_window
);
3333 if (redisplay_dont_pause
)
3335 #if PERIODIC_PREEMPTION_CHECKING
3336 else if (NILP (Vredisplay_preemption_period
))
3338 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3341 double p
= XFLOATINT (Vredisplay_preemption_period
);
3344 if (detect_input_pending_ignore_squeezables ())
3351 usec
= (p
- sec
) * 1000000;
3353 EMACS_GET_TIME (tm
);
3354 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3355 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3359 if (FRAME_WINDOW_P (f
))
3361 /* We are working on window matrix basis. All windows whose
3362 flag must_be_updated_p is set have to be updated. */
3364 /* Record that we are not working on frame matrices. */
3365 set_frame_matrix_frame (NULL
);
3367 /* Update all windows in the window tree of F, maybe stopping
3368 when pending input is detected. */
3371 /* Update the menu bar on X frames that don't have toolkit
3373 if (WINDOWP (f
->menu_bar_window
))
3374 update_window (XWINDOW (f
->menu_bar_window
), 1);
3376 /* Update the tool-bar window, if present. */
3377 if (WINDOWP (f
->tool_bar_window
))
3379 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3381 /* Update tool-bar window. */
3382 if (w
->must_be_updated_p
)
3386 update_window (w
, 1);
3387 w
->must_be_updated_p
= 0;
3389 /* Swap tool-bar strings. We swap because we want to
3391 tem
= f
->current_tool_bar_string
;
3392 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3393 f
->desired_tool_bar_string
= tem
;
3398 /* Update windows. */
3399 paused_p
= update_window_tree (root_window
, force_p
);
3402 /* This flush is a performance bottleneck under X,
3403 and it doesn't seem to be necessary anyway (in general).
3404 It is necessary when resizing the window with the mouse, or
3405 at least the fringes are not redrawn in a timely manner. ++kfs */
3406 if (f
->force_flush_display_p
)
3408 FRAME_RIF (f
)->flush_display (f
);
3409 f
->force_flush_display_p
= 0;
3414 /* We are working on frame matrix basis. Set the frame on whose
3415 frame matrix we operate. */
3416 set_frame_matrix_frame (f
);
3418 /* Build F's desired matrix from window matrices. */
3419 build_frame_matrix (f
);
3421 /* Update the display */
3423 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3426 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3428 if (FRAME_TTY (f
)->termscript
)
3429 fflush (FRAME_TTY (f
)->termscript
);
3430 if (FRAME_TERMCAP_P (f
))
3431 fflush (FRAME_TTY (f
)->output
);
3434 /* Check window matrices for lost pointers. */
3436 check_window_matrix_pointers (root_window
);
3437 add_frame_display_history (f
, paused_p
);
3442 /* Reset flags indicating that a window should be updated. */
3443 set_window_update_flags (root_window
, 0);
3445 display_completed
= !paused_p
;
3451 /************************************************************************
3452 Window-based updates
3453 ************************************************************************/
3455 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3456 don't stop updating when input is pending. */
3459 update_window_tree (struct window
*w
, int force_p
)
3463 while (w
&& !paused_p
)
3465 if (!NILP (w
->hchild
))
3466 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3467 else if (!NILP (w
->vchild
))
3468 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3469 else if (w
->must_be_updated_p
)
3470 paused_p
|= update_window (w
, force_p
);
3472 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3479 /* Update window W if its flag must_be_updated_p is non-zero. If
3480 FORCE_P is non-zero, don't stop updating if input is pending. */
3483 update_single_window (struct window
*w
, int force_p
)
3485 if (w
->must_be_updated_p
)
3487 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3489 /* Record that this is not a frame-based redisplay. */
3490 set_frame_matrix_frame (NULL
);
3492 if (redisplay_dont_pause
)
3494 #if PERIODIC_PREEMPTION_CHECKING
3495 else if (NILP (Vredisplay_preemption_period
))
3497 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3500 double p
= XFLOATINT (Vredisplay_preemption_period
);
3504 usec
= (p
- sec
) * 1000000;
3506 EMACS_GET_TIME (tm
);
3507 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3508 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3514 update_window (w
, force_p
);
3517 /* Reset flag in W. */
3518 w
->must_be_updated_p
= 0;
3522 #ifdef HAVE_WINDOW_SYSTEM
3524 /* Redraw lines from the current matrix of window W that are
3525 overlapped by other rows. YB is bottom-most y-position in W. */
3528 redraw_overlapped_rows (struct window
*w
, int yb
)
3531 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3533 /* If rows overlapping others have been changed, the rows being
3534 overlapped have to be redrawn. This won't draw lines that have
3535 already been drawn in update_window_line because overlapped_p in
3536 desired rows is 0, so after row assignment overlapped_p in
3537 current rows is 0. */
3538 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3540 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3542 if (!row
->enabled_p
)
3544 else if (row
->mode_line_p
)
3547 if (row
->overlapped_p
)
3549 enum glyph_row_area area
;
3551 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3554 updated_area
= area
;
3555 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3556 area
== TEXT_AREA
? row
->x
: 0);
3557 if (row
->used
[area
])
3558 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3560 FRAME_RIF (f
)->clear_end_of_line (-1);
3563 row
->overlapped_p
= 0;
3566 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3572 /* Redraw lines from the current matrix of window W that overlap
3573 others. YB is bottom-most y-position in W. */
3576 redraw_overlapping_rows (struct window
*w
, int yb
)
3579 struct glyph_row
*row
;
3580 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3582 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3584 row
= w
->current_matrix
->rows
+ i
;
3586 if (!row
->enabled_p
)
3588 else if (row
->mode_line_p
)
3591 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3593 if (row
->overlapping_p
)
3597 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3598 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3599 overlaps
|= OVERLAPS_PRED
;
3600 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3601 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3602 overlaps
|= OVERLAPS_SUCC
;
3606 if (row
->used
[LEFT_MARGIN_AREA
])
3607 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3609 if (row
->used
[TEXT_AREA
])
3610 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3612 if (row
->used
[RIGHT_MARGIN_AREA
])
3613 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3615 /* Record in neighbour rows that ROW overwrites part of
3617 if (overlaps
& OVERLAPS_PRED
)
3618 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3619 if (overlaps
& OVERLAPS_SUCC
)
3620 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3629 #endif /* HAVE_WINDOW_SYSTEM */
3634 /* Check that no row in the current matrix of window W is enabled
3635 which is below what's displayed in the window. */
3638 check_current_matrix_flags (struct window
*w
)
3640 int last_seen_p
= 0;
3641 int i
, yb
= window_text_bottom_y (w
);
3643 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3645 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3646 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3648 else if (last_seen_p
&& row
->enabled_p
)
3653 #endif /* GLYPH_DEBUG */
3656 /* Update display of window W. FORCE_P non-zero means that we should
3657 not stop when detecting pending input. */
3660 update_window (struct window
*w
, int force_p
)
3662 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3664 #if !PERIODIC_PREEMPTION_CHECKING
3665 int preempt_count
= baud_rate
/ 2400 + 1;
3667 extern int input_pending
;
3668 extern Lisp_Object do_mouse_tracking
;
3669 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3671 /* Check that W's frame doesn't have glyph matrices. */
3672 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3675 /* Check pending input the first time so that we can quickly return. */
3676 #if !PERIODIC_PREEMPTION_CHECKING
3678 detect_input_pending_ignore_squeezables ();
3681 /* If forced to complete the update, or if no input is pending, do
3683 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3685 struct glyph_row
*row
, *end
;
3686 struct glyph_row
*mode_line_row
;
3687 struct glyph_row
*header_line_row
;
3688 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3690 rif
->update_window_begin_hook (w
);
3691 yb
= window_text_bottom_y (w
);
3693 /* If window has a header line, update it before everything else.
3694 Adjust y-positions of other rows by the header line height. */
3695 row
= desired_matrix
->rows
;
3696 end
= row
+ desired_matrix
->nrows
- 1;
3698 if (row
->mode_line_p
)
3700 header_line_row
= row
;
3704 header_line_row
= NULL
;
3706 /* Update the mode line, if necessary. */
3707 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3708 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3710 mode_line_row
->y
= yb
;
3711 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3713 &mouse_face_overwritten_p
);
3716 /* Find first enabled row. Optimizations in redisplay_internal
3717 may lead to an update with only one row enabled. There may
3718 be also completely empty matrices. */
3719 while (row
< end
&& !row
->enabled_p
)
3722 /* Try reusing part of the display by copying. */
3723 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3725 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3728 /* All rows were found to be equal. */
3734 /* We've scrolled the display. */
3740 /* Update the rest of the lines. */
3741 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
3744 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3747 /* We'll have to play a little bit with when to
3748 detect_input_pending. If it's done too often,
3749 scrolling large windows with repeated scroll-up
3750 commands will too quickly pause redisplay. */
3751 #if PERIODIC_PREEMPTION_CHECKING
3755 EMACS_GET_TIME (tm
);
3756 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3757 if (EMACS_TIME_NEG_P (dif
))
3759 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3760 if (detect_input_pending_ignore_squeezables ())
3765 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3766 detect_input_pending_ignore_squeezables ();
3768 changed_p
|= update_window_line (w
, vpos
,
3769 &mouse_face_overwritten_p
);
3771 /* Mark all rows below the last visible one in the current
3772 matrix as invalid. This is necessary because of
3773 variable line heights. Consider the case of three
3774 successive redisplays, where the first displays 5
3775 lines, the second 3 lines, and the third 5 lines again.
3776 If the second redisplay wouldn't mark rows in the
3777 current matrix invalid, the third redisplay might be
3778 tempted to optimize redisplay based on lines displayed
3779 in the first redisplay. */
3780 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3781 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3782 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3785 /* Was display preempted? */
3786 paused_p
= row
< end
;
3790 /* Update the header line after scrolling because a new header
3791 line would otherwise overwrite lines at the top of the window
3792 that can be scrolled. */
3793 if (header_line_row
&& header_line_row
->enabled_p
)
3795 header_line_row
->y
= 0;
3796 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3799 /* Fix the appearance of overlapping/overlapped rows. */
3800 if (!paused_p
&& !w
->pseudo_window_p
)
3802 #ifdef HAVE_WINDOW_SYSTEM
3803 if (changed_p
&& rif
->fix_overlapping_area
)
3805 redraw_overlapped_rows (w
, yb
);
3806 redraw_overlapping_rows (w
, yb
);
3810 /* Make cursor visible at cursor position of W. */
3811 set_window_cursor_after_update (w
);
3813 #if 0 /* Check that current matrix invariants are satisfied. This is
3814 for debugging only. See the comment of check_matrix_invariants. */
3815 IF_DEBUG (check_matrix_invariants (w
));
3820 /* Remember the redisplay method used to display the matrix. */
3821 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3824 #ifdef HAVE_WINDOW_SYSTEM
3825 update_window_fringes (w
, 0);
3828 /* End the update of window W. Don't set the cursor if we
3829 paused updating the display because in this case,
3830 set_window_cursor_after_update hasn't been called, and
3831 output_cursor doesn't contain the cursor location. */
3832 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
3838 /* check_current_matrix_flags (w); */
3839 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
3842 clear_glyph_matrix (desired_matrix
);
3848 /* Update the display of area AREA in window W, row number VPOS.
3849 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3852 update_marginal_area (struct window
*w
, int area
, int vpos
)
3854 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3855 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3857 /* Let functions in xterm.c know what area subsequent X positions
3858 will be relative to. */
3859 updated_area
= area
;
3861 /* Set cursor to start of glyphs, write them, and clear to the end
3862 of the area. I don't think that something more sophisticated is
3863 necessary here, since marginal areas will not be the default. */
3864 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3865 if (desired_row
->used
[area
])
3866 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3867 rif
->clear_end_of_line (-1);
3871 /* Update the display of the text area of row VPOS in window W.
3872 Value is non-zero if display has changed. */
3875 update_text_area (struct window
*w
, int vpos
)
3877 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3878 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3879 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3882 /* Let functions in xterm.c know what area subsequent X positions
3883 will be relative to. */
3884 updated_area
= TEXT_AREA
;
3886 /* If rows are at different X or Y, or rows have different height,
3887 or the current row is marked invalid, write the entire line. */
3888 if (!current_row
->enabled_p
3889 || desired_row
->y
!= current_row
->y
3890 || desired_row
->ascent
!= current_row
->ascent
3891 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3892 || desired_row
->phys_height
!= current_row
->phys_height
3893 || desired_row
->visible_height
!= current_row
->visible_height
3894 || current_row
->overlapped_p
3895 /* This next line is necessary for correctly redrawing
3896 mouse-face areas after scrolling and other operations.
3897 However, it causes excessive flickering when mouse is moved
3898 across the mode line. Luckily, turning it off for the mode
3899 line doesn't seem to hurt anything. -- cyd.
3900 But it is still needed for the header line. -- kfs. */
3901 || (current_row
->mouse_face_p
3902 && !(current_row
->mode_line_p
&& vpos
> 0))
3903 || current_row
->x
!= desired_row
->x
)
3905 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3907 if (desired_row
->used
[TEXT_AREA
])
3908 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3909 desired_row
->used
[TEXT_AREA
]);
3911 /* Clear to end of window. */
3912 rif
->clear_end_of_line (-1);
3915 /* This erases the cursor. We do this here because
3916 notice_overwritten_cursor cannot easily check this, which
3917 might indicate that the whole functionality of
3918 notice_overwritten_cursor would better be implemented here.
3919 On the other hand, we need notice_overwritten_cursor as long
3920 as mouse highlighting is done asynchronously outside of
3922 if (vpos
== w
->phys_cursor
.vpos
)
3923 w
->phys_cursor_on_p
= 0;
3928 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3929 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3930 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3931 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
3932 int abort_skipping
= 0;
3934 /* If the desired row extends its face to the text area end, and
3935 unless the current row also does so at the same position,
3936 make sure we write at least one glyph, so that the face
3937 extension actually takes place. */
3938 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3939 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
3940 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
3941 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
3944 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
3948 /* Loop over glyphs that current and desired row may have
3952 int can_skip_p
= !abort_skipping
;
3954 /* Skip over glyphs that both rows have in common. These
3955 don't have to be written. We can't skip if the last
3956 current glyph overlaps the glyph to its right. For
3957 example, consider a current row of `if ' with the `f' in
3958 Courier bold so that it overlaps the ` ' to its right.
3959 If the desired row is ` ', we would skip over the space
3960 after the `if' and there would remain a pixel from the
3961 `f' on the screen. */
3962 if (overlapping_glyphs_p
&& i
> 0)
3964 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
3967 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
3969 can_skip_p
= (right
== 0 && !abort_skipping
);
3977 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3979 x
+= desired_glyph
->pixel_width
;
3980 ++desired_glyph
, ++current_glyph
, ++i
;
3983 /* Consider the case that the current row contains "xxx
3984 ppp ggg" in italic Courier font, and the desired row
3985 is "xxx ggg". The character `p' has lbearing, `g'
3986 has not. The loop above will stop in front of the
3987 first `p' in the current row. If we would start
3988 writing glyphs there, we wouldn't erase the lbearing
3989 of the `p'. The rest of the lbearing problem is then
3990 taken care of by draw_glyphs. */
3991 if (overlapping_glyphs_p
3993 && i
< current_row
->used
[TEXT_AREA
]
3994 && (current_row
->used
[TEXT_AREA
]
3995 != desired_row
->used
[TEXT_AREA
]))
3999 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4001 while (left
> 0 && i
> 0)
4003 --i
, --desired_glyph
, --current_glyph
;
4004 x
-= desired_glyph
->pixel_width
;
4005 left
-= desired_glyph
->pixel_width
;
4008 /* Abort the skipping algorithm if we end up before
4009 our starting point, to avoid looping (bug#1070).
4010 This can happen when the lbearing is larger than
4012 abort_skipping
= (i
< start_hpos
);
4016 /* Try to avoid writing the entire rest of the desired row
4017 by looking for a resync point. This mainly prevents
4018 mode line flickering in the case the mode line is in
4019 fixed-pitch font, which it usually will be. */
4020 if (i
< desired_row
->used
[TEXT_AREA
])
4022 int start_x
= x
, start_hpos
= i
;
4023 struct glyph
*start
= desired_glyph
;
4025 int skip_first_p
= !can_skip_p
;
4027 /* Find the next glyph that's equal again. */
4030 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4033 x
+= desired_glyph
->pixel_width
;
4034 current_x
+= current_glyph
->pixel_width
;
4035 ++desired_glyph
, ++current_glyph
, ++i
;
4039 if (i
== start_hpos
|| x
!= current_x
)
4043 desired_glyph
= start
;
4047 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4048 rif
->write_glyphs (start
, i
- start_hpos
);
4053 /* Write the rest. */
4054 if (i
< desired_row
->used
[TEXT_AREA
])
4056 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4057 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4061 /* Maybe clear to end of line. */
4062 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4064 /* If new row extends to the end of the text area, nothing
4065 has to be cleared, if and only if we did a write_glyphs
4066 above. This is made sure by setting desired_stop_pos
4067 appropriately above. */
4068 xassert (i
< desired_row
->used
[TEXT_AREA
]
4069 || ((desired_row
->used
[TEXT_AREA
]
4070 == current_row
->used
[TEXT_AREA
])
4071 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4073 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4075 /* If old row extends to the end of the text area, clear. */
4076 if (i
>= desired_row
->used
[TEXT_AREA
])
4077 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4078 desired_row
->pixel_width
);
4079 rif
->clear_end_of_line (-1);
4082 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4084 /* Otherwise clear to the end of the old row. Everything
4085 after that position should be clear already. */
4088 if (i
>= desired_row
->used
[TEXT_AREA
])
4089 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4090 desired_row
->pixel_width
);
4092 /* If cursor is displayed at the end of the line, make sure
4093 it's cleared. Nowadays we don't have a phys_cursor_glyph
4094 with which to erase the cursor (because this method
4095 doesn't work with lbearing/rbearing), so we must do it
4097 if (vpos
== w
->phys_cursor
.vpos
4098 && (desired_row
->reversed_p
4099 ? (w
->phys_cursor
.hpos
< 0)
4100 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
4102 w
->phys_cursor_on_p
= 0;
4106 x
= current_row
->pixel_width
;
4107 rif
->clear_end_of_line (x
);
4116 /* Update row VPOS in window W. Value is non-zero if display has been
4120 update_window_line (struct window
*w
, int vpos
, int *mouse_face_overwritten_p
)
4122 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4123 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4124 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4127 /* Set the row being updated. This is important to let xterm.c
4128 know what line height values are in effect. */
4129 updated_row
= desired_row
;
4131 /* A row can be completely invisible in case a desired matrix was
4132 built with a vscroll and then make_cursor_line_fully_visible shifts
4133 the matrix. Make sure to make such rows current anyway, since
4134 we need the correct y-position, for example, in the current matrix. */
4135 if (desired_row
->mode_line_p
4136 || desired_row
->visible_height
> 0)
4138 xassert (desired_row
->enabled_p
);
4140 /* Update display of the left margin area, if there is one. */
4141 if (!desired_row
->full_width_p
4142 && !NILP (w
->left_margin_cols
))
4145 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4148 /* Update the display of the text area. */
4149 if (update_text_area (w
, vpos
))
4152 if (current_row
->mouse_face_p
)
4153 *mouse_face_overwritten_p
= 1;
4156 /* Update display of the right margin area, if there is one. */
4157 if (!desired_row
->full_width_p
4158 && !NILP (w
->right_margin_cols
))
4161 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4164 /* Draw truncation marks etc. */
4165 if (!current_row
->enabled_p
4166 || desired_row
->y
!= current_row
->y
4167 || desired_row
->visible_height
!= current_row
->visible_height
4168 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4169 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4170 || current_row
->redraw_fringe_bitmaps_p
4171 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4172 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4173 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4174 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4175 rif
->after_update_window_line_hook (desired_row
);
4178 /* Update current_row from desired_row. */
4179 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4185 /* Set the cursor after an update of window W. This function may only
4186 be called from update_window. */
4189 set_window_cursor_after_update (struct window
*w
)
4191 struct frame
*f
= XFRAME (w
->frame
);
4192 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4193 int cx
, cy
, vpos
, hpos
;
4195 /* Not intended for frame matrix updates. */
4196 xassert (FRAME_WINDOW_P (f
));
4198 if (cursor_in_echo_area
4199 && !NILP (echo_area_buffer
[0])
4200 /* If we are showing a message instead of the mini-buffer,
4201 show the cursor for the message instead. */
4202 && XWINDOW (minibuf_window
) == w
4203 && EQ (minibuf_window
, echo_area_window
)
4204 /* These cases apply only to the frame that contains
4205 the active mini-buffer window. */
4206 && FRAME_HAS_MINIBUF_P (f
)
4207 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4209 cx
= cy
= vpos
= hpos
= 0;
4211 if (cursor_in_echo_area
>= 0)
4213 /* If the mini-buffer is several lines high, find the last
4214 line that has any text on it. Note: either all lines
4215 are enabled or none. Otherwise we wouldn't be able to
4217 struct glyph_row
*row
, *last_row
;
4218 struct glyph
*glyph
;
4219 int yb
= window_text_bottom_y (w
);
4222 row
= w
->current_matrix
->rows
;
4223 while (row
->enabled_p
4224 && (last_row
== NULL
4225 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4227 if (row
->used
[TEXT_AREA
]
4228 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4235 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4236 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4238 while (last
> start
&& last
->charpos
< 0)
4241 for (glyph
= start
; glyph
< last
; ++glyph
)
4243 cx
+= glyph
->pixel_width
;
4248 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4256 hpos
= w
->cursor
.hpos
;
4257 vpos
= w
->cursor
.vpos
;
4260 /* Window cursor can be out of sync for horizontally split windows. */
4261 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4262 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4263 vpos
= max (0, vpos
);
4264 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4265 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4269 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4270 tree rooted at W. */
4273 set_window_update_flags (struct window
*w
, int on_p
)
4277 if (!NILP (w
->hchild
))
4278 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4279 else if (!NILP (w
->vchild
))
4280 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4282 w
->must_be_updated_p
= on_p
;
4284 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4290 /***********************************************************************
4291 Window-Based Scrolling
4292 ***********************************************************************/
4294 /* Structure describing rows in scrolling_window. */
4298 /* Number of occurrences of this row in desired and current matrix. */
4299 int old_uses
, new_uses
;
4301 /* Vpos of row in new matrix. */
4302 int new_line_number
;
4304 /* Bucket index of this row_entry in the hash table row_table. */
4307 /* The row described by this entry. */
4308 struct glyph_row
*row
;
4310 /* Hash collision chain. */
4311 struct row_entry
*next
;
4314 /* A pool to allocate row_entry structures from, and the size of the
4315 pool. The pool is reallocated in scrolling_window when we find
4316 that we need a larger one. */
4318 static struct row_entry
*row_entry_pool
;
4319 static int row_entry_pool_size
;
4321 /* Index of next free entry in row_entry_pool. */
4323 static int row_entry_idx
;
4325 /* The hash table used during scrolling, and the table's size. This
4326 table is used to quickly identify equal rows in the desired and
4329 static struct row_entry
**row_table
;
4330 static int row_table_size
;
4332 /* Vectors of pointers to row_entry structures belonging to the
4333 current and desired matrix, and the size of the vectors. */
4335 static struct row_entry
**old_lines
, **new_lines
;
4336 static int old_lines_size
, new_lines_size
;
4338 /* A pool to allocate run structures from, and its size. */
4340 static struct run
*run_pool
;
4341 static int runs_size
;
4343 /* A vector of runs of lines found during scrolling. */
4345 static struct run
**runs
;
4347 /* Add glyph row ROW to the scrolling hash table during the scrolling
4350 static INLINE
struct row_entry
*
4351 add_row_entry (struct window
*w
, struct glyph_row
*row
)
4353 struct row_entry
*entry
;
4354 int i
= row
->hash
% row_table_size
;
4356 entry
= row_table
[i
];
4357 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4358 entry
= entry
->next
;
4362 entry
= row_entry_pool
+ row_entry_idx
++;
4364 entry
->old_uses
= entry
->new_uses
= 0;
4365 entry
->new_line_number
= 0;
4367 entry
->next
= row_table
[i
];
4368 row_table
[i
] = entry
;
4375 /* Try to reuse part of the current display of W by scrolling lines.
4376 HEADER_LINE_P non-zero means W has a header line.
4378 The algorithm is taken from Communications of the ACM, Apr78 "A
4379 Technique for Isolating Differences Between Files." It should take
4382 A short outline of the steps of the algorithm
4384 1. Skip lines equal at the start and end of both matrices.
4386 2. Enter rows in the current and desired matrix into a symbol
4387 table, counting how often they appear in both matrices.
4389 3. Rows that appear exactly once in both matrices serve as anchors,
4390 i.e. we assume that such lines are likely to have been moved.
4392 4. Starting from anchor lines, extend regions to be scrolled both
4393 forward and backward.
4397 -1 if all rows were found to be equal.
4398 0 to indicate that we did not scroll the display, or
4399 1 if we did scroll. */
4402 scrolling_window (struct window
*w
, int header_line_p
)
4404 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4405 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4406 int yb
= window_text_bottom_y (w
);
4407 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4408 int nruns
, nbytes
, n
, run_idx
;
4409 struct row_entry
*entry
;
4410 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4412 /* Skip over rows equal at the start. */
4413 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4415 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4416 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4420 && !d
->redraw_fringe_bitmaps_p
4422 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4423 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4424 && row_equal_p (w
, c
, d
, 1))
4433 /* Give up if some rows in the desired matrix are not enabled. */
4434 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4437 first_old
= first_new
= i
;
4439 /* Set last_new to the index + 1 of the last enabled row in the
4442 while (i
< desired_matrix
->nrows
- 1
4443 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4444 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4447 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4452 /* Set last_old to the index + 1 of the last enabled row in the
4453 current matrix. We don't look at the enabled flag here because
4454 we plan to reuse part of the display even if other parts are
4457 while (i
< current_matrix
->nrows
- 1)
4459 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4468 /* Skip over rows equal at the bottom. */
4471 while (i
- 1 > first_new
4472 && j
- 1 > first_old
4473 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4474 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4475 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4476 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4478 MATRIX_ROW (desired_matrix
, i
- 1),
4479 MATRIX_ROW (current_matrix
, j
- 1), 1))
4484 /* Nothing to do if all rows are equal. */
4485 if (last_new
== first_new
)
4488 /* Reallocate vectors, tables etc. if necessary. */
4490 if (current_matrix
->nrows
> old_lines_size
)
4492 old_lines_size
= current_matrix
->nrows
;
4493 nbytes
= old_lines_size
* sizeof *old_lines
;
4494 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4497 if (desired_matrix
->nrows
> new_lines_size
)
4499 new_lines_size
= desired_matrix
->nrows
;
4500 nbytes
= new_lines_size
* sizeof *new_lines
;
4501 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4504 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4505 if (3 * n
> row_table_size
)
4507 row_table_size
= next_almost_prime (3 * n
);
4508 nbytes
= row_table_size
* sizeof *row_table
;
4509 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4510 memset (row_table
, 0, nbytes
);
4513 if (n
> row_entry_pool_size
)
4515 row_entry_pool_size
= n
;
4516 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4517 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4520 if (desired_matrix
->nrows
> runs_size
)
4522 runs_size
= desired_matrix
->nrows
;
4523 nbytes
= runs_size
* sizeof *runs
;
4524 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4525 nbytes
= runs_size
* sizeof *run_pool
;
4526 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4529 nruns
= run_idx
= 0;
4532 /* Add rows from the current and desired matrix to the hash table
4533 row_hash_table to be able to find equal ones quickly. */
4535 for (i
= first_old
; i
< last_old
; ++i
)
4537 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4539 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4540 old_lines
[i
] = entry
;
4544 old_lines
[i
] = NULL
;
4547 for (i
= first_new
; i
< last_new
; ++i
)
4549 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4550 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4552 entry
->new_line_number
= i
;
4553 new_lines
[i
] = entry
;
4556 /* Identify moves based on lines that are unique and equal
4557 in both matrices. */
4558 for (i
= first_old
; i
< last_old
;)
4560 && old_lines
[i
]->old_uses
== 1
4561 && old_lines
[i
]->new_uses
== 1)
4564 int new_line
= old_lines
[i
]->new_line_number
;
4565 struct run
*run
= run_pool
+ run_idx
++;
4568 run
->current_vpos
= i
;
4569 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4570 run
->desired_vpos
= new_line
;
4571 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4573 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4575 /* Extend backward. */
4578 while (j
> first_old
4580 && old_lines
[j
] == new_lines
[k
])
4582 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4583 --run
->current_vpos
;
4584 --run
->desired_vpos
;
4587 run
->desired_y
-= h
;
4588 run
->current_y
-= h
;
4592 /* Extend forward. */
4597 && old_lines
[j
] == new_lines
[k
])
4599 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4605 /* Insert run into list of all runs. Order runs by copied
4606 pixel lines. Note that we record runs that don't have to
4607 be copied because they are already in place. This is done
4608 because we can avoid calling update_window_line in this
4610 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4612 for (k
= nruns
; k
> j
; --k
)
4613 runs
[k
] = runs
[k
- 1];
4622 /* Do the moves. Do it in a way that we don't overwrite something
4623 we want to copy later on. This is not solvable in general
4624 because there is only one display and we don't have a way to
4625 exchange areas on this display. Example:
4627 +-----------+ +-----------+
4629 +-----------+ --> +-----------+
4631 +-----------+ +-----------+
4633 Instead, prefer bigger moves, and invalidate moves that would
4634 copy from where we copied to. */
4636 for (i
= 0; i
< nruns
; ++i
)
4637 if (runs
[i
]->nrows
> 0)
4639 struct run
*r
= runs
[i
];
4641 /* Copy on the display. */
4642 if (r
->current_y
!= r
->desired_y
)
4644 rif
->scroll_run_hook (w
, r
);
4646 /* Invalidate runs that copy from where we copied to. */
4647 for (j
= i
+ 1; j
< nruns
; ++j
)
4649 struct run
*p
= runs
[j
];
4651 if ((p
->current_y
>= r
->desired_y
4652 && p
->current_y
< r
->desired_y
+ r
->height
)
4653 || (p
->current_y
+ p
->height
>= r
->desired_y
4654 && (p
->current_y
+ p
->height
4655 < r
->desired_y
+ r
->height
)))
4660 /* Assign matrix rows. */
4661 for (j
= 0; j
< r
->nrows
; ++j
)
4663 struct glyph_row
*from
, *to
;
4664 int to_overlapped_p
;
4666 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4667 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4668 to_overlapped_p
= to
->overlapped_p
;
4669 if (!from
->mode_line_p
&& !w
->pseudo_window_p
4670 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
4671 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
4672 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
4673 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
4674 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
4675 from
->redraw_fringe_bitmaps_p
= 1;
4676 assign_row (to
, from
);
4677 to
->enabled_p
= 1, from
->enabled_p
= 0;
4678 to
->overlapped_p
= to_overlapped_p
;
4682 /* Clear the hash table, for the next time. */
4683 for (i
= 0; i
< row_entry_idx
; ++i
)
4684 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4686 /* Value is > 0 to indicate that we scrolled the display. */
4692 /************************************************************************
4694 ************************************************************************/
4696 /* Update the desired frame matrix of frame F.
4698 FORCE_P non-zero means that the update should not be stopped by
4699 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4700 should not be tried.
4702 Value is non-zero if update was stopped due to pending input. */
4705 update_frame_1 (struct frame
*f
, int force_p
, int inhibit_id_p
)
4707 /* Frame matrices to work on. */
4708 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4709 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4712 int preempt_count
= baud_rate
/ 2400 + 1;
4713 extern int input_pending
;
4715 xassert (current_matrix
&& desired_matrix
);
4717 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4718 calculate_costs (f
);
4720 if (preempt_count
<= 0)
4723 #if !PERIODIC_PREEMPTION_CHECKING
4724 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4731 /* If we cannot insert/delete lines, it's no use trying it. */
4732 if (!FRAME_LINE_INS_DEL_OK (f
))
4735 /* See if any of the desired lines are enabled; don't compute for
4736 i/d line if just want cursor motion. */
4737 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4738 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4741 /* Try doing i/d line, if not yet inhibited. */
4742 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4743 force_p
|= scrolling (f
);
4745 /* Update the individual lines as needed. Do bottom line first. */
4746 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4747 update_frame_line (f
, desired_matrix
->nrows
- 1);
4749 /* Now update the rest of the lines. */
4750 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4752 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4754 if (FRAME_TERMCAP_P (f
))
4756 /* Flush out every so many lines.
4757 Also flush out if likely to have more than 1k buffered
4758 otherwise. I'm told that some telnet connections get
4759 really screwed by more than 1k output at once. */
4760 FILE *display_output
= FRAME_TTY (f
)->output
;
4763 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4765 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4767 fflush (display_output
);
4768 if (preempt_count
== 1)
4770 #ifdef EMACS_OUTQSIZE
4771 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4772 /* Probably not a tty. Ignore the error and reset
4774 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4777 if (baud_rate
<= outq
&& baud_rate
> 0)
4778 sleep (outq
/ baud_rate
);
4784 #if PERIODIC_PREEMPTION_CHECKING
4788 EMACS_GET_TIME (tm
);
4789 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4790 if (EMACS_TIME_NEG_P (dif
))
4792 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4793 if (detect_input_pending_ignore_squeezables ())
4798 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4799 detect_input_pending_ignore_squeezables ();
4802 update_frame_line (f
, i
);
4806 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4808 /* Now just clean up termcap drivers and set cursor, etc. */
4811 if ((cursor_in_echo_area
4812 /* If we are showing a message instead of the mini-buffer,
4813 show the cursor for the message instead of for the
4814 (now hidden) mini-buffer contents. */
4815 || (EQ (minibuf_window
, selected_window
)
4816 && EQ (minibuf_window
, echo_area_window
)
4817 && !NILP (echo_area_buffer
[0])))
4818 /* These cases apply only to the frame that contains
4819 the active mini-buffer window. */
4820 && FRAME_HAS_MINIBUF_P (f
)
4821 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4823 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
4826 if (cursor_in_echo_area
< 0)
4828 /* Negative value of cursor_in_echo_area means put
4829 cursor at beginning of line. */
4835 /* Positive value of cursor_in_echo_area means put
4836 cursor at the end of the prompt. If the mini-buffer
4837 is several lines high, find the last line that has
4839 row
= FRAME_LINES (f
);
4845 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4847 /* Frame rows are filled up with spaces that
4848 must be ignored here. */
4849 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4851 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4852 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4855 && (last
- 1)->charpos
< 0)
4861 while (row
> top
&& col
== 0);
4863 /* Make sure COL is not out of range. */
4864 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4866 /* If we have another row, advance cursor into it. */
4867 if (row
< FRAME_LINES (f
) - 1)
4869 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
4872 /* Otherwise move it back in range. */
4874 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4878 cursor_to (f
, row
, col
);
4882 /* We have only one cursor on terminal frames. Use it to
4883 display the cursor of the selected window. */
4884 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4885 if (w
->cursor
.vpos
>= 0
4886 /* The cursor vpos may be temporarily out of bounds
4887 in the following situation: There is one window,
4888 with the cursor in the lower half of it. The window
4889 is split, and a message causes a redisplay before
4890 a new cursor position has been computed. */
4891 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
4893 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4894 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4896 if (INTEGERP (w
->left_margin_cols
))
4897 x
+= XFASTINT (w
->left_margin_cols
);
4899 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
4900 cursor_to (f
, y
, x
);
4907 clear_desired_matrices (f
);
4912 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4915 scrolling (struct frame
*frame
)
4917 int unchanged_at_top
, unchanged_at_bottom
;
4920 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4921 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4922 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4923 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4925 int free_at_end_vpos
= FRAME_LINES (frame
);
4926 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4927 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4929 if (!current_matrix
)
4932 /* Compute hash codes of all the lines. Also calculate number of
4933 changed lines, number of unchanged lines at the beginning, and
4934 number of unchanged lines at the end. */
4936 unchanged_at_top
= 0;
4937 unchanged_at_bottom
= FRAME_LINES (frame
);
4938 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
4940 /* Give up on this scrolling if some old lines are not enabled. */
4941 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4943 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4944 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4946 /* This line cannot be redrawn, so don't let scrolling mess it. */
4947 new_hash
[i
] = old_hash
[i
];
4948 #define INFINITY 1000000 /* Taken from scroll.c */
4949 draw_cost
[i
] = INFINITY
;
4953 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4954 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4957 if (old_hash
[i
] != new_hash
[i
])
4960 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
4962 else if (i
== unchanged_at_top
)
4964 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4967 /* If changed lines are few, don't allow preemption, don't scroll. */
4968 if ((!FRAME_SCROLL_REGION_OK (frame
)
4969 && changed_lines
< baud_rate
/ 2400)
4970 || unchanged_at_bottom
== FRAME_LINES (frame
))
4973 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
4974 - unchanged_at_bottom
);
4976 if (FRAME_SCROLL_REGION_OK (frame
))
4977 free_at_end_vpos
-= unchanged_at_bottom
;
4978 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
4979 free_at_end_vpos
= -1;
4981 /* If large window, fast terminal and few lines in common between
4982 current frame and desired frame, don't bother with i/d calc. */
4983 if (!FRAME_SCROLL_REGION_OK (frame
)
4984 && window_size
>= 18 && baud_rate
> 2400
4986 10 * scrolling_max_lines_saved (unchanged_at_top
,
4987 FRAME_LINES (frame
) - unchanged_at_bottom
,
4988 old_hash
, new_hash
, draw_cost
)))
4991 if (window_size
< 2)
4994 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
4995 draw_cost
+ unchanged_at_top
- 1,
4996 old_draw_cost
+ unchanged_at_top
- 1,
4997 old_hash
+ unchanged_at_top
- 1,
4998 new_hash
+ unchanged_at_top
- 1,
4999 free_at_end_vpos
- unchanged_at_top
);
5005 /* Count the number of blanks at the start of the vector of glyphs R
5006 which is LEN glyphs long. */
5009 count_blanks (struct glyph
*r
, int len
)
5013 for (i
= 0; i
< len
; ++i
)
5014 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5021 /* Count the number of glyphs in common at the start of the glyph
5022 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5023 of STR2. Value is the number of equal glyphs equal at the start. */
5026 count_match (struct glyph
*str1
, struct glyph
*end1
, struct glyph
*str2
, struct glyph
*end2
)
5028 struct glyph
*p1
= str1
;
5029 struct glyph
*p2
= str2
;
5033 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5040 /* Char insertion/deletion cost vector, from term.c */
5042 extern int *char_ins_del_vector
;
5043 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5046 /* Perform a frame-based update on line VPOS in frame FRAME. */
5049 update_frame_line (struct frame
*f
, int vpos
)
5051 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5053 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5054 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5055 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5056 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5057 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5058 int must_write_whole_line_p
;
5059 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5060 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5061 != FACE_TTY_DEFAULT_BG_COLOR
);
5063 if (colored_spaces_p
)
5066 /* Current row not enabled means it has unknown contents. We must
5067 write the whole desired line in that case. */
5068 must_write_whole_line_p
= !current_row
->enabled_p
;
5069 if (must_write_whole_line_p
)
5076 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5077 olen
= current_row
->used
[TEXT_AREA
];
5079 /* Ignore trailing spaces, if we can. */
5080 if (!write_spaces_p
)
5081 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5085 current_row
->enabled_p
= 1;
5086 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5088 /* If desired line is empty, just clear the line. */
5089 if (!desired_row
->enabled_p
)
5095 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5096 nlen
= desired_row
->used
[TEXT_AREA
];
5097 nend
= nbody
+ nlen
;
5099 /* If display line has unknown contents, write the whole line. */
5100 if (must_write_whole_line_p
)
5102 /* Ignore spaces at the end, if we can. */
5103 if (!write_spaces_p
)
5104 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5107 /* Write the contents of the desired line. */
5110 cursor_to (f
, vpos
, 0);
5111 write_glyphs (f
, nbody
, nlen
);
5114 /* Don't call clear_end_of_line if we already wrote the whole
5115 line. The cursor will not be at the right margin in that
5116 case but in the line below. */
5117 if (nlen
< FRAME_TOTAL_COLS (f
))
5119 cursor_to (f
, vpos
, nlen
);
5120 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5123 /* Make sure we are in the right row, otherwise cursor movement
5124 with cmgoto might use `ch' in the wrong row. */
5125 cursor_to (f
, vpos
, 0);
5127 make_current (desired_matrix
, current_matrix
, vpos
);
5131 /* Pretend trailing spaces are not there at all,
5132 unless for one reason or another we must write all spaces. */
5133 if (!write_spaces_p
)
5134 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5137 /* If there's no i/d char, quickly do the best we can without it. */
5138 if (!FRAME_CHAR_INS_DEL_OK (f
))
5142 /* Find the first glyph in desired row that doesn't agree with
5143 a glyph in the current row, and write the rest from there on. */
5144 for (i
= 0; i
< nlen
; i
++)
5146 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5148 /* Find the end of the run of different glyphs. */
5152 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5153 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5156 /* Output this run of non-matching chars. */
5157 cursor_to (f
, vpos
, i
);
5158 write_glyphs (f
, nbody
+ i
, j
- i
);
5161 /* Now find the next non-match. */
5165 /* Clear the rest of the line, or the non-clear part of it. */
5168 cursor_to (f
, vpos
, nlen
);
5169 clear_end_of_line (f
, olen
);
5172 /* Make current row = desired row. */
5173 make_current (desired_matrix
, current_matrix
, vpos
);
5177 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5178 characters in a row. */
5182 /* If current line is blank, skip over initial spaces, if
5183 possible, and write the rest. */
5187 nsp
= count_blanks (nbody
, nlen
);
5191 cursor_to (f
, vpos
, nsp
);
5192 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5195 /* Exchange contents between current_frame and new_frame. */
5196 make_current (desired_matrix
, current_matrix
, vpos
);
5200 /* Compute number of leading blanks in old and new contents. */
5201 osp
= count_blanks (obody
, olen
);
5202 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5204 /* Compute number of matching chars starting with first non-blank. */
5205 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5206 nbody
+ nsp
, nbody
+ nlen
);
5208 /* Spaces in new match implicit space past the end of old. */
5209 /* A bug causing this to be a no-op was fixed in 18.29. */
5210 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5213 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5217 /* Avoid doing insert/delete char
5218 just cause number of leading spaces differs
5219 when the following text does not match. */
5220 if (begmatch
== 0 && osp
!= nsp
)
5221 osp
= nsp
= min (osp
, nsp
);
5223 /* Find matching characters at end of line */
5226 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5228 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5233 endmatch
= obody
+ olen
- op1
;
5235 /* tem gets the distance to insert or delete.
5236 endmatch is how many characters we save by doing so.
5239 tem
= (nlen
- nsp
) - (olen
- osp
);
5241 && (!FRAME_CHAR_INS_DEL_OK (f
)
5242 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5245 /* nsp - osp is the distance to insert or delete.
5246 If that is nonzero, begmatch is known to be nonzero also.
5247 begmatch + endmatch is how much we save by doing the ins/del.
5251 && (!FRAME_CHAR_INS_DEL_OK (f
)
5252 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5256 osp
= nsp
= min (osp
, nsp
);
5259 /* Now go through the line, inserting, writing and
5260 deleting as appropriate. */
5264 cursor_to (f
, vpos
, nsp
);
5265 delete_glyphs (f
, osp
- nsp
);
5269 /* If going to delete chars later in line
5270 and insert earlier in the line,
5271 must delete first to avoid losing data in the insert */
5272 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5274 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5275 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5276 olen
= nlen
- (nsp
- osp
);
5278 cursor_to (f
, vpos
, osp
);
5279 insert_glyphs (f
, 0, nsp
- osp
);
5283 tem
= nsp
+ begmatch
+ endmatch
;
5284 if (nlen
!= tem
|| olen
!= tem
)
5286 if (!endmatch
|| nlen
== olen
)
5288 /* If new text being written reaches right margin, there is
5289 no need to do clear-to-eol at the end of this function
5290 (and it would not be safe, since cursor is not going to
5291 be "at the margin" after the text is done). */
5292 if (nlen
== FRAME_TOTAL_COLS (f
))
5295 /* Function write_glyphs is prepared to do nothing
5296 if passed a length <= 0. Check it here to avoid
5297 unnecessary cursor movement. */
5300 cursor_to (f
, vpos
, nsp
+ begmatch
);
5301 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5304 else if (nlen
> olen
)
5306 /* Here, we used to have the following simple code:
5307 ----------------------------------------
5308 write_glyphs (nbody + nsp + begmatch, olen - tem);
5309 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5310 ----------------------------------------
5311 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5312 is a padding glyph. */
5313 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5316 cursor_to (f
, vpos
, nsp
+ begmatch
);
5318 /* Calculate columns we can actually overwrite. */
5319 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5321 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5323 /* If we left columns to be overwritten, we must delete them. */
5324 del
= olen
- tem
- out
;
5326 delete_glyphs (f
, del
);
5328 /* At last, we insert columns not yet written out. */
5329 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5332 else if (olen
> nlen
)
5334 cursor_to (f
, vpos
, nsp
+ begmatch
);
5335 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5336 delete_glyphs (f
, olen
- nlen
);
5342 /* If any unerased characters remain after the new line, erase them. */
5345 cursor_to (f
, vpos
, nlen
);
5346 clear_end_of_line (f
, olen
);
5349 /* Exchange contents between current_frame and new_frame. */
5350 make_current (desired_matrix
, current_matrix
, vpos
);
5355 /***********************************************************************
5356 X/Y Position -> Buffer Position
5357 ***********************************************************************/
5359 /* Determine what's under window-relative pixel position (*X, *Y).
5360 Return the object (string or buffer) that's there.
5361 Return in *POS the position in that object.
5362 Adjust *X and *Y to character positions. */
5365 buffer_posn_from_coords (struct window
*w
, int *x
, int *y
, struct display_pos
*pos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5368 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5369 struct text_pos startp
;
5371 struct glyph_row
*row
;
5372 #ifdef HAVE_WINDOW_SYSTEM
5373 struct image
*img
= 0;
5377 /* We used to set current_buffer directly here, but that does the
5378 wrong thing with `face-remapping-alist' (bug#2044). */
5379 Fset_buffer (w
->buffer
);
5380 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5381 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5382 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5383 start_display (&it
, w
, startp
);
5385 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5386 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5387 MOVE_TO_X
| MOVE_TO_Y
);
5389 Fset_buffer (old_current_buffer
);
5391 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5392 *dy
= *y
- it
.current_y
;
5395 if (STRINGP (it
.string
))
5399 #ifdef HAVE_WINDOW_SYSTEM
5400 if (it
.what
== IT_IMAGE
)
5402 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5403 && !NILP (img
->spec
))
5404 *object
= img
->spec
;
5408 if (it
.vpos
< w
->current_matrix
->nrows
5409 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5412 if (it
.hpos
< row
->used
[TEXT_AREA
])
5414 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5415 #ifdef HAVE_WINDOW_SYSTEM
5418 *dy
-= row
->ascent
- glyph
->ascent
;
5419 *dx
+= glyph
->slice
.x
;
5420 *dy
+= glyph
->slice
.y
;
5421 /* Image slices positions are still relative to the entire image */
5422 *width
= img
->width
;
5423 *height
= img
->height
;
5428 *width
= glyph
->pixel_width
;
5429 *height
= glyph
->ascent
+ glyph
->descent
;
5435 *height
= row
->height
;
5440 *width
= *height
= 0;
5443 /* Add extra (default width) columns if clicked after EOL. */
5444 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5446 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5455 /* Value is the string under window-relative coordinates X/Y in the
5456 mode line or header line (PART says which) of window W, or nil if none.
5457 *CHARPOS is set to the position in the string returned. */
5460 mode_line_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5462 struct glyph_row
*row
;
5463 struct glyph
*glyph
, *end
;
5465 Lisp_Object string
= Qnil
;
5467 if (part
== ON_MODE_LINE
)
5468 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5470 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5472 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5474 if (row
->mode_line_p
&& row
->enabled_p
)
5476 /* Find the glyph under X. If we find one with a string object,
5477 it's the one we were looking for. */
5478 glyph
= row
->glyphs
[TEXT_AREA
];
5479 end
= glyph
+ row
->used
[TEXT_AREA
];
5480 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5481 x0
-= glyph
->pixel_width
;
5482 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5485 string
= glyph
->object
;
5486 *charpos
= glyph
->charpos
;
5487 *width
= glyph
->pixel_width
;
5488 *height
= glyph
->ascent
+ glyph
->descent
;
5489 #ifdef HAVE_WINDOW_SYSTEM
5490 if (glyph
->type
== IMAGE_GLYPH
)
5493 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5495 *object
= img
->spec
;
5496 y0
-= row
->ascent
- glyph
->ascent
;
5502 /* Add extra (default width) columns if clicked after EOL. */
5503 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5505 *height
= row
->height
;
5512 *width
= *height
= 0;
5522 /* Value is the string under window-relative coordinates X/Y in either
5523 marginal area, or nil if none. *CHARPOS is set to the position in
5524 the string returned. */
5527 marginal_area_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5529 struct glyph_row
*row
= w
->current_matrix
->rows
;
5530 struct glyph
*glyph
, *end
;
5531 int x0
, y0
, i
, wy
= *y
;
5533 Lisp_Object string
= Qnil
;
5535 if (part
== ON_LEFT_MARGIN
)
5536 area
= LEFT_MARGIN_AREA
;
5537 else if (part
== ON_RIGHT_MARGIN
)
5538 area
= RIGHT_MARGIN_AREA
;
5542 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5543 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5546 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5550 /* Find the glyph under X. If we find one with a string object,
5551 it's the one we were looking for. */
5552 if (area
== RIGHT_MARGIN_AREA
)
5553 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5554 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5555 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5556 + window_box_width (w
, LEFT_MARGIN_AREA
)
5557 + window_box_width (w
, TEXT_AREA
));
5559 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5560 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5563 glyph
= row
->glyphs
[area
];
5564 end
= glyph
+ row
->used
[area
];
5565 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5566 x0
-= glyph
->pixel_width
;
5567 *x
= glyph
- row
->glyphs
[area
];
5570 string
= glyph
->object
;
5571 *charpos
= glyph
->charpos
;
5572 *width
= glyph
->pixel_width
;
5573 *height
= glyph
->ascent
+ glyph
->descent
;
5574 #ifdef HAVE_WINDOW_SYSTEM
5575 if (glyph
->type
== IMAGE_GLYPH
)
5578 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5580 *object
= img
->spec
;
5581 y0
-= row
->ascent
- glyph
->ascent
;
5582 x0
+= glyph
->slice
.x
;
5583 y0
+= glyph
->slice
.y
;
5589 /* Add extra (default width) columns if clicked after EOL. */
5590 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5592 *height
= row
->height
;
5599 *width
= *height
= 0;
5609 /***********************************************************************
5610 Changing Frame Sizes
5611 ***********************************************************************/
5616 window_change_signal (int signalnum
) /* If we don't have an argument, */
5617 /* some compilers complain in signal calls. */
5620 int old_errno
= errno
;
5622 struct tty_display_info
*tty
;
5624 signal (SIGWINCH
, window_change_signal
);
5625 SIGNAL_THREAD_CHECK (signalnum
);
5627 /* The frame size change obviously applies to a single
5628 termcap-controlled terminal, but we can't decide which.
5629 Therefore, we resize the frames corresponding to each tty.
5631 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5633 if (! tty
->term_initted
)
5636 /* Suspended tty frames have tty->input == NULL avoid trying to
5641 get_tty_size (fileno (tty
->input
), &width
, &height
);
5643 if (width
> 5 && height
> 2) {
5644 Lisp_Object tail
, frame
;
5646 FOR_EACH_FRAME (tail
, frame
)
5647 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5648 /* Record the new sizes, but don't reallocate the data
5649 structures now. Let that be done later outside of the
5651 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5657 #endif /* SIGWINCH */
5660 /* Do any change in frame size that was requested by a signal. SAFE
5661 non-zero means this function is called from a place where it is
5662 safe to change frame sizes while a redisplay is in progress. */
5665 do_pending_window_change (int safe
)
5667 /* If window_change_signal should have run before, run it now. */
5668 if (redisplaying_p
&& !safe
)
5671 while (delayed_size_change
)
5673 Lisp_Object tail
, frame
;
5675 delayed_size_change
= 0;
5677 FOR_EACH_FRAME (tail
, frame
)
5679 struct frame
*f
= XFRAME (frame
);
5681 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5682 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5689 /* Change the frame height and/or width. Values may be given as zero to
5690 indicate no change is to take place.
5692 If DELAY is non-zero, then assume we're being called from a signal
5693 handler, and queue the change for later - perhaps the next
5694 redisplay. Since this tries to resize windows, we can't call it
5695 from a signal handler.
5697 SAFE non-zero means this function is called from a place where it's
5698 safe to change frame sizes while a redisplay is in progress. */
5701 change_frame_size (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5703 Lisp_Object tail
, frame
;
5705 if (FRAME_MSDOS_P (f
))
5707 /* On MS-DOS, all frames use the same screen, so a change in
5708 size affects all frames. Termcap now supports multiple
5710 FOR_EACH_FRAME (tail
, frame
)
5711 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5712 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5713 pretend
, delay
, safe
);
5716 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5720 change_frame_size_1 (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5722 int new_frame_total_cols
;
5723 int count
= SPECPDL_INDEX ();
5725 /* If we can't deal with the change now, queue it for later. */
5726 if (delay
|| (redisplaying_p
&& !safe
))
5728 f
->new_text_lines
= newheight
;
5729 f
->new_text_cols
= newwidth
;
5730 delayed_size_change
= 1;
5734 /* This size-change overrides any pending one for this frame. */
5735 f
->new_text_lines
= 0;
5736 f
->new_text_cols
= 0;
5738 /* If an argument is zero, set it to the current value. */
5740 newheight
= FRAME_LINES (f
);
5742 newwidth
= FRAME_COLS (f
);
5744 /* Compute width of windows in F.
5745 This is the width of the frame without vertical scroll bars. */
5746 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5748 /* Round up to the smallest acceptable size. */
5749 check_frame_size (f
, &newheight
, &newwidth
);
5751 /* If we're not changing the frame size, quit now. */
5752 /* Frame width may be unchanged but the text portion may change, for example,
5753 fullscreen and remove/add scroll bar. */
5754 if (newheight
== FRAME_LINES (f
)
5755 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5756 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5762 /* We only can set screen dimensions to certain values supported
5763 by our video hardware. Try to find the smallest size greater
5764 or equal to the requested dimensions. */
5765 dos_set_window_size (&newheight
, &newwidth
);
5768 if (newheight
!= FRAME_LINES (f
))
5770 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5772 /* Frame has both root and mini-buffer. */
5773 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
5774 FRAME_TOP_MARGIN (f
));
5775 set_window_height (FRAME_ROOT_WINDOW (f
),
5778 - FRAME_TOP_MARGIN (f
)),
5780 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
5782 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5785 /* Frame has just one top-level window. */
5786 set_window_height (FRAME_ROOT_WINDOW (f
),
5787 newheight
- FRAME_TOP_MARGIN (f
), 2);
5789 /* MSDOS frames cannot PRETEND, as they change frame size by
5790 manipulating video hardware. */
5791 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5792 FrameRows (FRAME_TTY (f
)) = newheight
;
5795 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
5797 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
5798 if (FRAME_HAS_MINIBUF_P (f
))
5799 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
5801 /* MSDOS frames cannot PRETEND, as they change frame size by
5802 manipulating video hardware. */
5803 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5804 FrameCols (FRAME_TTY (f
)) = newwidth
;
5806 if (WINDOWP (f
->tool_bar_window
))
5807 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
5810 FRAME_LINES (f
) = newheight
;
5811 SET_FRAME_COLS (f
, newwidth
);
5814 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5815 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5817 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5819 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5820 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5821 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5822 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5826 calculate_costs (f
);
5827 SET_FRAME_GARBAGED (f
);
5832 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5834 run_window_configuration_change_hook (f
);
5836 unbind_to (count
, Qnil
);
5841 /***********************************************************************
5842 Terminal Related Lisp Functions
5843 ***********************************************************************/
5845 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5846 1, 1, "FOpen termscript file: ",
5847 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5848 FILE = nil means just close any termscript file currently open. */)
5851 struct tty_display_info
*tty
;
5853 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
5854 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
5855 error ("Current frame is not on a tty device");
5859 if (tty
->termscript
!= 0)
5862 fclose (tty
->termscript
);
5865 tty
->termscript
= 0;
5869 file
= Fexpand_file_name (file
, Qnil
);
5870 tty
->termscript
= fopen (SDATA (file
), "w");
5871 if (tty
->termscript
== 0)
5872 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5878 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5879 Ssend_string_to_terminal
, 1, 2, 0,
5880 doc
: /* Send STRING to the terminal without alteration.
5881 Control characters in STRING will have terminal-dependent effects.
5883 Optional parameter TERMINAL specifies the tty terminal device to use.
5884 It may be a terminal object, a frame, or nil for the terminal used by
5885 the currently selected frame. In batch mode, STRING is sent to stdout
5886 when TERMINAL is nil. */)
5887 (Lisp_Object string
, Lisp_Object terminal
)
5889 struct terminal
*t
= get_terminal (terminal
, 1);
5892 /* ??? Perhaps we should do something special for multibyte strings here. */
5893 CHECK_STRING (string
);
5897 error ("Unknown terminal device");
5899 if (t
->type
== output_initial
)
5901 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
5902 error ("Device %d is not a termcap terminal device", t
->id
);
5905 struct tty_display_info
*tty
= t
->display_info
.tty
;
5908 error ("Terminal is currently suspended");
5910 if (tty
->termscript
)
5912 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
5913 fflush (tty
->termscript
);
5917 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
5924 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5925 doc
: /* Beep, or flash the screen.
5926 Also, unless an argument is given,
5927 terminate any keyboard macro currently executing. */)
5935 ring_bell (XFRAME (selected_frame
));
5944 bitch_at_user (void)
5948 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5949 error ("Keyboard macro terminated by a command ringing the bell");
5951 ring_bell (XFRAME (selected_frame
));
5956 /***********************************************************************
5958 ***********************************************************************/
5960 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5961 doc
: /* Pause, without updating display, for SECONDS seconds.
5962 SECONDS may be a floating-point value, meaning that you can wait for a
5963 fraction of a second. Optional second arg MILLISECONDS specifies an
5964 additional wait period, in milliseconds; this may be useful if your
5965 Emacs was built without floating point support.
5966 \(Not all operating systems support waiting for a fraction of a second.) */)
5967 (Lisp_Object seconds
, Lisp_Object milliseconds
)
5971 if (NILP (milliseconds
))
5972 XSETINT (milliseconds
, 0);
5974 CHECK_NUMBER (milliseconds
);
5975 usec
= XINT (milliseconds
) * 1000;
5978 double duration
= extract_float (seconds
);
5979 sec
= (int) duration
;
5980 usec
+= (duration
- sec
) * 1000000;
5983 #ifndef EMACS_HAS_USECS
5984 if (sec
== 0 && usec
!= 0)
5985 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5988 /* Assure that 0 <= usec < 1000000. */
5991 /* We can't rely on the rounding being correct if usec is negative. */
5992 if (-1000000 < usec
)
5993 sec
--, usec
+= 1000000;
5995 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
5998 sec
+= usec
/ 1000000, usec
%= 1000000;
6000 if (sec
< 0 || (sec
== 0 && usec
== 0))
6003 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6009 /* This is just like wait_reading_process_output, except that
6012 TIMEOUT is number of seconds to wait (float or integer),
6013 or t to wait forever.
6014 READING is 1 if reading input.
6015 If DO_DISPLAY is >0 display process output while waiting.
6016 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6020 sit_for (Lisp_Object timeout
, int reading
, int do_display
)
6024 swallow_events (do_display
);
6026 if ((detect_input_pending_run_timers (do_display
))
6027 || !NILP (Vexecuting_kbd_macro
))
6030 if (do_display
>= 2)
6031 redisplay_preserve_echo_area (2);
6033 if (INTEGERP (timeout
))
6035 sec
= XINT (timeout
);
6038 else if (FLOATP (timeout
))
6040 double seconds
= XFLOAT_DATA (timeout
);
6041 sec
= (int) seconds
;
6042 usec
= (int) ((seconds
- sec
) * 1000000);
6044 else if (EQ (timeout
, Qt
))
6050 wrong_type_argument (Qnumberp
, timeout
);
6052 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6059 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6062 return detect_input_pending () ? Qnil
: Qt
;
6066 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6067 doc
: /* Perform redisplay if no input is available.
6068 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6069 perform a full redisplay even if input is available.
6070 Return t if redisplay was performed, nil otherwise. */)
6076 if ((detect_input_pending_run_timers (1)
6077 && NILP (force
) && !redisplay_dont_pause
)
6078 || !NILP (Vexecuting_kbd_macro
))
6081 count
= SPECPDL_INDEX ();
6082 if (!NILP (force
) && !redisplay_dont_pause
)
6083 specbind (Qredisplay_dont_pause
, Qt
);
6084 redisplay_preserve_echo_area (2);
6085 unbind_to (count
, Qnil
);
6091 /***********************************************************************
6092 Other Lisp Functions
6093 ***********************************************************************/
6095 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6096 session's frames, frame names, buffers, buffer-read-only flags, and
6097 buffer-modified-flags. */
6099 static Lisp_Object frame_and_buffer_state
;
6102 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6103 Sframe_or_buffer_changed_p
, 0, 1, 0,
6104 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6105 VARIABLE is a variable name whose value is either nil or a state vector
6106 that will be updated to contain all frames and buffers,
6107 aside from buffers whose names start with space,
6108 along with the buffers' read-only and modified flags. This allows a fast
6109 check to see whether buffer menus might need to be recomputed.
6110 If this function returns non-nil, it updates the internal vector to reflect
6113 If VARIABLE is nil, an internal variable is used. Users should not
6114 pass nil for VARIABLE. */)
6115 (Lisp_Object variable
)
6117 Lisp_Object state
, tail
, frame
, buf
;
6118 Lisp_Object
*vecp
, *end
;
6121 if (! NILP (variable
))
6123 CHECK_SYMBOL (variable
);
6124 state
= Fsymbol_value (variable
);
6125 if (! VECTORP (state
))
6129 state
= frame_and_buffer_state
;
6131 vecp
= XVECTOR (state
)->contents
;
6132 end
= vecp
+ XVECTOR (state
)->size
;
6134 FOR_EACH_FRAME (tail
, frame
)
6138 if (!EQ (*vecp
++, frame
))
6142 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6145 /* Check that the buffer info matches. */
6146 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6148 buf
= XCDR (XCAR (tail
));
6149 /* Ignore buffers that aren't included in buffer lists. */
6150 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6154 if (!EQ (*vecp
++, buf
))
6158 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6162 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6167 /* Detect deletion of a buffer at the end of the list. */
6168 if (EQ (*vecp
, Qlambda
))
6171 /* Come here if we decide the data has changed. */
6173 /* Count the size we will need.
6174 Start with 1 so there is room for at least one lambda at the end. */
6176 FOR_EACH_FRAME (tail
, frame
)
6178 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6180 /* Reallocate the vector if data has grown to need it,
6181 or if it has shrunk a lot. */
6182 if (! VECTORP (state
)
6183 || n
> XVECTOR (state
)->size
6184 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6185 /* Add 20 extra so we grow it less often. */
6187 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6188 if (! NILP (variable
))
6189 Fset (variable
, state
);
6191 frame_and_buffer_state
= state
;
6194 /* Record the new data in the (possibly reallocated) vector. */
6195 vecp
= XVECTOR (state
)->contents
;
6196 FOR_EACH_FRAME (tail
, frame
)
6199 *vecp
++ = XFRAME (frame
)->name
;
6201 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6203 buf
= XCDR (XCAR (tail
));
6204 /* Ignore buffers that aren't included in buffer lists. */
6205 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6208 *vecp
++ = XBUFFER (buf
)->read_only
;
6209 *vecp
++ = Fbuffer_modified_p (buf
);
6211 /* Fill up the vector with lambdas (always at least one). */
6213 while (vecp
- XVECTOR (state
)->contents
6214 < XVECTOR (state
)->size
)
6216 /* Make sure we didn't overflow the vector. */
6217 if (vecp
- XVECTOR (state
)->contents
6218 > XVECTOR (state
)->size
)
6225 /***********************************************************************
6227 ***********************************************************************/
6229 /* Initialization done when Emacs fork is started, before doing stty.
6230 Determine terminal type and set terminal_driver. Then invoke its
6231 decoding routine to set up variables in the terminal package. */
6236 char *terminal_type
;
6238 #ifdef HAVE_X_WINDOWS
6239 extern int display_arg
;
6242 /* Construct the space glyph. */
6243 space_glyph
.type
= CHAR_GLYPH
;
6244 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6245 space_glyph
.charpos
= -1;
6248 cursor_in_echo_area
= 0;
6249 terminal_type
= (char *) 0;
6251 /* Now is the time to initialize this; it's used by init_sys_modes
6253 Vinitial_window_system
= Qnil
;
6255 /* SIGWINCH needs to be handled no matter what display we start
6256 with. Otherwise newly opened tty frames will not resize
6261 #endif /* CANNOT_DUMP */
6262 signal (SIGWINCH
, window_change_signal
);
6263 #endif /* SIGWINCH */
6265 /* If running as a daemon, no need to initialize any frames/terminal. */
6269 /* If the user wants to use a window system, we shouldn't bother
6270 initializing the terminal. This is especially important when the
6271 terminal is so dumb that emacs gives up before and doesn't bother
6272 using the window system.
6274 If the DISPLAY environment variable is set and nonempty,
6275 try to use X, and die with an error message if that doesn't work. */
6277 #ifdef HAVE_X_WINDOWS
6278 if (! inhibit_window_system
&& ! display_arg
)
6281 display
= getenv ("DISPLAY");
6282 display_arg
= (display
!= 0 && *display
!= 0);
6284 if (display_arg
&& !x_display_ok (display
))
6286 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6288 inhibit_window_system
= 1;
6292 if (!inhibit_window_system
&& display_arg
6298 Vinitial_window_system
= Qx
;
6300 Vwindow_system_version
= make_number (11);
6302 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6303 /* In some versions of ncurses,
6304 tputs crashes if we have not called tgetent.
6306 { char b
[2044]; tgetent (b
, "xterm");}
6308 adjust_frame_glyphs_initially ();
6311 #endif /* HAVE_X_WINDOWS */
6314 if (!inhibit_window_system
)
6316 Vinitial_window_system
= Qw32
;
6317 Vwindow_system_version
= make_number (1);
6318 adjust_frame_glyphs_initially ();
6321 #endif /* HAVE_NTGUI */
6324 if (!inhibit_window_system
6330 Vinitial_window_system
= Qns
;
6331 Vwindow_system_version
= make_number(10);
6332 adjust_frame_glyphs_initially ();
6337 /* If no window system has been specified, try to use the terminal. */
6340 fatal ("standard input is not a tty");
6345 terminal_type
= "w32console";
6347 /* Look at the TERM variable. */
6348 terminal_type
= (char *) getenv ("TERM");
6352 #ifdef HAVE_WINDOW_SYSTEM
6353 if (! inhibit_window_system
)
6354 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6356 #endif /* HAVE_WINDOW_SYSTEM */
6357 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6363 struct frame
*f
= XFRAME (selected_frame
);
6365 /* Open a display on the controlling tty. */
6366 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6368 /* Convert the initial frame to use the new display. */
6369 if (f
->output_method
!= output_initial
)
6371 f
->output_method
= t
->type
;
6374 t
->reference_count
++;
6375 t
->display_info
.tty
->top_frame
= selected_frame
;
6376 change_frame_size (XFRAME (selected_frame
),
6377 FrameRows (t
->display_info
.tty
),
6378 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6380 /* Delete the initial terminal. */
6381 if (--initial_terminal
->reference_count
== 0
6382 && initial_terminal
->delete_terminal_hook
)
6383 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6385 /* Update frame parameters to reflect the new type. */
6386 Fmodify_frame_parameters
6387 (selected_frame
, Fcons (Fcons (Qtty_type
,
6388 Ftty_type (selected_frame
)), Qnil
));
6389 if (t
->display_info
.tty
->name
)
6390 Fmodify_frame_parameters (selected_frame
,
6391 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6394 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6399 struct frame
*sf
= SELECTED_FRAME ();
6400 int width
= FRAME_TOTAL_COLS (sf
);
6401 int height
= FRAME_LINES (sf
);
6403 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6405 /* If these sizes are so big they cause overflow, just ignore the
6406 change. It's not clear what better we could do. */
6407 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6408 fatal ("screen size %dx%d too big", width
, height
);
6411 adjust_frame_glyphs_initially ();
6412 calculate_costs (XFRAME (selected_frame
));
6414 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6417 && NILP (Vinitial_window_system
))
6419 /* For the initial frame, we don't have any way of knowing what
6420 are the foreground and background colors of the terminal. */
6421 struct frame
*sf
= SELECTED_FRAME();
6423 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6424 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6425 call0 (intern ("tty-set-up-initial-frame-faces"));
6431 /***********************************************************************
6433 ***********************************************************************/
6435 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6436 Sinternal_show_cursor
, 2, 2, 0,
6437 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6438 WINDOW nil means use the selected window. SHOW non-nil means
6439 show a cursor in WINDOW in the next redisplay. SHOW nil means
6440 don't show a cursor. */)
6441 (Lisp_Object window
, Lisp_Object show
)
6443 /* Don't change cursor state while redisplaying. This could confuse
6445 if (!redisplaying_p
)
6448 window
= selected_window
;
6450 CHECK_WINDOW (window
);
6452 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6459 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6460 Sinternal_show_cursor_p
, 0, 1, 0,
6461 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6462 WINDOW nil or omitted means report on the selected window. */)
6463 (Lisp_Object window
)
6468 window
= selected_window
;
6470 CHECK_WINDOW (window
);
6472 w
= XWINDOW (window
);
6473 return w
->cursor_off_p
? Qnil
: Qt
;
6476 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6477 Slast_nonminibuf_frame
, 0, 0, 0,
6478 doc
: /* Value is last nonminibuffer frame. */)
6481 Lisp_Object frame
= Qnil
;
6483 if (last_nonminibuf_frame
)
6484 XSETFRAME (frame
, last_nonminibuf_frame
);
6489 /***********************************************************************
6491 ***********************************************************************/
6494 syms_of_display (void)
6496 defsubr (&Sredraw_frame
);
6497 defsubr (&Sredraw_display
);
6498 defsubr (&Sframe_or_buffer_changed_p
);
6499 defsubr (&Sopen_termscript
);
6501 defsubr (&Sredisplay
);
6502 defsubr (&Ssleep_for
);
6503 defsubr (&Ssend_string_to_terminal
);
6504 defsubr (&Sinternal_show_cursor
);
6505 defsubr (&Sinternal_show_cursor_p
);
6506 defsubr (&Slast_nonminibuf_frame
);
6509 defsubr (&Sdump_redisplay_history
);
6512 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6513 staticpro (&frame_and_buffer_state
);
6515 Qdisplay_table
= intern_c_string ("display-table");
6516 staticpro (&Qdisplay_table
);
6517 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
6518 staticpro (&Qredisplay_dont_pause
);
6520 DEFVAR_INT ("baud-rate", &baud_rate
,
6521 doc
: /* *The output baud rate of the terminal.
6522 On most systems, changing this value will affect the amount of padding
6523 and the other strategic decisions made during redisplay. */);
6525 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6526 doc
: /* *Non-nil means invert the entire frame display.
6527 This means everything is in inverse video which otherwise would not be. */);
6529 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6530 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6532 See also `ring-bell-function'. */);
6534 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6535 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6536 A non-nil value is useful if the terminal can automatically preserve
6537 Emacs's frame display when you reenter Emacs.
6538 It is up to you to set this variable if your terminal can do that. */);
6540 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6541 doc
: /* Name of the window system that Emacs uses for the first frame.
6542 The value is a symbol--for instance, `x' for X windows.
6543 The value is nil if Emacs is using a text-only terminal. */);
6545 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6546 doc
: /* Name of window system through which the selected frame is displayed.
6547 The value is a symbol--for instance, `x' for X windows.
6548 The value is nil if the selected frame is on a text-only-terminal. */);
6550 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6551 doc
: /* The version number of the window system in use.
6552 For X windows, this is 11. */);
6554 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6555 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6557 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6558 doc
: /* Table defining how to output a glyph code to the frame.
6559 If not nil, this is a vector indexed by glyph code to define the glyph.
6560 Each element can be:
6561 integer: a glyph code which this glyph is an alias for.
6562 string: output this glyph using that string (not impl. in X windows).
6563 nil: this glyph mod 524288 is the code of a character to output,
6564 and this glyph / 524288 is the face number (see `face-id') to use
6565 while outputting it. */);
6566 Vglyph_table
= Qnil
;
6568 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6569 doc
: /* Display table to use for buffers that specify none.
6570 See `buffer-display-table' for more information. */);
6571 Vstandard_display_table
= Qnil
;
6573 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6574 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6575 redisplay_dont_pause
= 0;
6577 #if PERIODIC_PREEMPTION_CHECKING
6578 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
6579 doc
: /* *The period in seconds between checking for input during redisplay.
6580 If input is detected, redisplay is pre-empted, and the input is processed.
6581 If nil, never pre-empt redisplay. */);
6582 Vredisplay_preemption_period
= make_float (0.10);
6589 Vinitial_window_system
= Qnil
;
6590 Vwindow_system_version
= Qnil
;
6594 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6595 (do not change this comment) */