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 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 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static int showing_window_margins_p
P_ ((struct window
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
196 are supported, so we can check for input during redisplay at
197 regular intervals. */
198 #ifdef EMACS_HAS_USECS
199 #define PERIODIC_PREEMPTION_CHECKING 1
201 #define PERIODIC_PREEMPTION_CHECKING 0
204 #if PERIODIC_PREEMPTION_CHECKING
206 /* If a number (float), check for user input every N seconds. */
208 Lisp_Object Vredisplay_preemption_period
;
210 /* Redisplay preemption timers. */
212 static EMACS_TIME preemption_period
;
213 static EMACS_TIME preemption_next_check
;
217 /* Nonzero upon entry to redisplay means do not assume anything about
218 current contents of actual terminal frame; clear and redraw it. */
222 /* Nonzero means last display completed. Zero means it was preempted. */
224 int display_completed
;
226 /* Lisp variable visible-bell; enables use of screen-flash instead of
231 /* Invert the color of the whole frame, at a low level. */
235 /* Line speed of the terminal. */
239 /* Either nil or a symbol naming the window system under which Emacs
240 creates the first frame. */
242 Lisp_Object Vinitial_window_system
;
244 /* Version number of X windows: 10, 11 or nil. */
246 Lisp_Object Vwindow_system_version
;
248 /* Vector of glyph definitions. Indexed by glyph number, the contents
249 are a string which is how to output the glyph.
251 If Vglyph_table is nil, a glyph is output by using its low 8 bits
254 This is an obsolete feature that is no longer used. The variable
255 is retained for compatibility. */
257 Lisp_Object Vglyph_table
;
259 /* Display table to use for vectors that don't specify their own. */
261 Lisp_Object Vstandard_display_table
;
263 /* Nonzero means reading single-character input with prompt so put
264 cursor on mini-buffer after the prompt. Positive means at end of
265 text in echo area; negative means at beginning of line. */
267 int cursor_in_echo_area
;
269 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
272 /* The currently selected frame. In a single-frame version, this
273 variable always equals the_only_frame. */
275 Lisp_Object selected_frame
;
277 /* A frame which is not just a mini-buffer, or 0 if there are no such
278 frames. This is usually the most recent such frame that was
279 selected. In a single-frame version, this variable always holds
280 the address of the_only_frame. */
282 struct frame
*last_nonminibuf_frame
;
284 /* 1 means SIGWINCH happened when not safe. */
286 int delayed_size_change
;
288 /* 1 means glyph initialization has been completed at startup. */
290 static int glyphs_initialized_initially_p
;
292 /* Updated window if != 0. Set by update_window. */
294 struct window
*updated_window
;
296 /* Glyph row updated in update_window_line, and area that is updated. */
298 struct glyph_row
*updated_row
;
301 /* A glyph for a space. */
303 struct glyph space_glyph
;
305 /* Non-zero means update has been performed directly, so that there's
306 no need for redisplay_internal to do much work. Set by
307 direct_output_for_insert. */
309 int redisplay_performed_directly_p
;
311 /* Counts of allocated structures. These counts serve to diagnose
312 memory leaks and double frees. */
314 int glyph_matrix_count
;
315 int glyph_pool_count
;
317 /* If non-null, the frame whose frame matrices are manipulated. If
318 null, window matrices are worked on. */
320 static struct frame
*frame_matrix_frame
;
322 /* Non-zero means that fonts have been loaded since the last glyph
323 matrix adjustments. Redisplay must stop, and glyph matrices must
324 be adjusted when this flag becomes non-zero during display. The
325 reason fonts can be loaded so late is that fonts of fontsets are
326 loaded on demand. Another reason is that a line contains many
327 characters displayed by zero width or very narrow glyphs of
328 variable-width fonts. */
332 /* Convert vpos and hpos from frame to window and vice versa.
333 This may only be used for terminal frames. */
337 static int window_to_frame_vpos
P_ ((struct window
*, int));
338 static int window_to_frame_hpos
P_ ((struct window
*, int));
339 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
340 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
342 /* One element of the ring buffer containing redisplay history
345 struct redisplay_history
347 char trace
[512 + 100];
350 /* The size of the history buffer. */
352 #define REDISPLAY_HISTORY_SIZE 30
354 /* The redisplay history buffer. */
356 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
358 /* Next free entry in redisplay_history. */
360 static int history_idx
;
362 /* A tick that's incremented each time something is added to the
365 static unsigned history_tick
;
367 static void add_frame_display_history
P_ ((struct frame
*, int));
368 static void add_window_display_history
P_ ((struct window
*, char *, int));
370 /* Add to the redisplay history how window W has been displayed.
371 MSG is a trace containing the information how W's glyph matrix
372 has been constructed. PAUSED_P non-zero means that the update
373 has been interrupted for pending input. */
376 add_window_display_history (w
, msg
, paused_p
)
383 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
385 buf
= redisplay_history
[history_idx
].trace
;
388 sprintf (buf
, "%d: window %p (`%s')%s\n",
391 ((BUFFERP (w
->buffer
)
392 && STRINGP (XBUFFER (w
->buffer
)->name
))
393 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
395 paused_p
? " ***paused***" : "");
400 /* Add to the redisplay history that frame F has been displayed.
401 PAUSED_P non-zero means that the update has been interrupted for
405 add_frame_display_history (f
, paused_p
)
411 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
413 buf
= redisplay_history
[history_idx
].trace
;
416 sprintf (buf
, "%d: update frame %p%s",
418 f
, paused_p
? " ***paused***" : "");
422 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
423 Sdump_redisplay_history
, 0, 0, "",
424 doc
: /* Dump redisplay history to stderr. */)
429 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
432 i
= REDISPLAY_HISTORY_SIZE
- 1;
433 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
440 #else /* GLYPH_DEBUG == 0 */
442 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
443 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
445 #endif /* GLYPH_DEBUG == 0 */
448 /* Like bcopy except never gets confused by overlap. Let this be the
449 first function defined in this file, or change emacs.c where the
450 address of this function is used. */
453 safe_bcopy (from
, to
, size
)
458 if (size
<= 0 || from
== to
)
461 /* If the source and destination don't overlap, then bcopy can
462 handle it. If they do overlap, but the destination is lower in
463 memory than the source, we'll assume bcopy can handle that. */
464 if (to
< from
|| from
+ size
<= to
)
465 bcopy (from
, to
, size
);
467 /* Otherwise, we'll copy from the end. */
470 register const char *endf
= from
+ size
;
471 register char *endt
= to
+ size
;
473 /* If TO - FROM is large, then we should break the copy into
474 nonoverlapping chunks of TO - FROM bytes each. However, if
475 TO - FROM is small, then the bcopy function call overhead
476 makes this not worth it. The crossover point could be about
477 anywhere. Since I don't think the obvious copy loop is too
478 bad, I'm trying to err in its favor. */
483 while (endf
!= from
);
495 bcopy (endf
, endt
, to
- from
);
498 /* If SIZE wasn't a multiple of TO - FROM, there will be a
499 little left over. The amount left over is (endt + (to -
500 from)) - to, which is endt - from. */
501 bcopy (from
, to
, endt
- from
);
508 /***********************************************************************
510 ***********************************************************************/
512 /* Allocate and return a glyph_matrix structure. POOL is the glyph
513 pool from which memory for the matrix should be allocated, or null
514 for window-based redisplay where no glyph pools are used. The
515 member `pool' of the glyph matrix structure returned is set to
516 POOL, the structure is otherwise zeroed. */
518 struct glyph_matrix
*
519 new_glyph_matrix (pool
)
520 struct glyph_pool
*pool
;
522 struct glyph_matrix
*result
;
524 /* Allocate and clear. */
525 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
526 bzero (result
, sizeof *result
);
528 /* Increment number of allocated matrices. This count is used
529 to detect memory leaks. */
530 ++glyph_matrix_count
;
532 /* Set pool and return. */
538 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
540 The global counter glyph_matrix_count is decremented when a matrix
541 is freed. If the count gets negative, more structures were freed
542 than allocated, i.e. one matrix was freed more than once or a bogus
543 pointer was passed to this function.
545 If MATRIX->pool is null, this means that the matrix manages its own
546 glyph memory---this is done for matrices on X frames. Freeing the
547 matrix also frees the glyph memory in this case. */
550 free_glyph_matrix (matrix
)
551 struct glyph_matrix
*matrix
;
557 /* Detect the case that more matrices are freed than were
559 if (--glyph_matrix_count
< 0)
562 /* Free glyph memory if MATRIX owns it. */
563 if (matrix
->pool
== NULL
)
564 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
565 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
567 /* Free row structures and the matrix itself. */
568 xfree (matrix
->rows
);
574 /* Return the number of glyphs to reserve for a marginal area of
575 window W. TOTAL_GLYPHS is the number of glyphs in a complete
576 display line of window W. MARGIN gives the width of the marginal
577 area in canonical character units. MARGIN should be an integer
581 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
588 if (NUMBERP (margin
))
590 int width
= XFASTINT (w
->total_cols
);
591 double d
= max (0, XFLOATINT (margin
));
592 d
= min (width
/ 2 - 1, d
);
593 n
= (int) ((double) total_glyphs
/ width
* d
);
602 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
605 W is null if the function is called for a frame glyph matrix.
606 Otherwise it is the window MATRIX is a member of. X and Y are the
607 indices of the first column and row of MATRIX within the frame
608 matrix, if such a matrix exists. They are zero for purely
609 window-based redisplay. DIM is the needed size of the matrix.
611 In window-based redisplay, where no frame matrices exist, glyph
612 matrices manage their own glyph storage. Otherwise, they allocate
613 storage from a common frame glyph pool which can be found in
616 The reason for this memory management strategy is to avoid complete
617 frame redraws if possible. When we allocate from a common pool, a
618 change of the location or size of a sub-matrix within the pool
619 requires a complete redisplay of the frame because we cannot easily
620 make sure that the current matrices of all windows still agree with
621 what is displayed on the screen. While this is usually fast, it
622 leads to screen flickering. */
625 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
627 struct glyph_matrix
*matrix
;
633 int marginal_areas_changed_p
= 0;
634 int header_line_changed_p
= 0;
635 int header_line_p
= 0;
636 int left
= -1, right
= -1;
637 int window_width
= -1, window_height
= -1;
639 /* See if W had a header line that has disappeared now, or vice versa.
643 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
645 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
646 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
648 matrix
->header_line_p
= header_line_p
;
650 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
651 Do nothing if MATRIX' size, position, vscroll, and marginal areas
652 haven't changed. This optimization is important because preserving
653 the matrix means preventing redisplay. */
654 if (matrix
->pool
== NULL
)
656 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
657 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
658 xassert (left
>= 0 && right
>= 0);
659 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
660 || right
!= matrix
->right_margin_glyphs
);
662 if (!marginal_areas_changed_p
664 && !header_line_changed_p
665 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
666 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
667 && matrix
->window_height
== window_height
668 && matrix
->window_vscroll
== w
->vscroll
669 && matrix
->window_width
== window_width
)
673 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
674 if (matrix
->rows_allocated
< dim
.height
)
676 int size
= dim
.height
* sizeof (struct glyph_row
);
677 new_rows
= dim
.height
- matrix
->rows_allocated
;
678 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
679 bzero (matrix
->rows
+ matrix
->rows_allocated
,
680 new_rows
* sizeof *matrix
->rows
);
681 matrix
->rows_allocated
= dim
.height
;
686 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
687 on a frame not using window-based redisplay. Set up pointers for
688 each row into the glyph pool. */
691 xassert (matrix
->pool
->glyphs
);
695 left
= margin_glyphs_to_reserve (w
, dim
.width
,
696 w
->left_margin_cols
);
697 right
= margin_glyphs_to_reserve (w
, dim
.width
,
698 w
->right_margin_cols
);
703 for (i
= 0; i
< dim
.height
; ++i
)
705 struct glyph_row
*row
= &matrix
->rows
[i
];
707 row
->glyphs
[LEFT_MARGIN_AREA
]
708 = (matrix
->pool
->glyphs
709 + (y
+ i
) * matrix
->pool
->ncolumns
713 || row
== matrix
->rows
+ dim
.height
- 1
714 || (row
== matrix
->rows
&& matrix
->header_line_p
))
716 row
->glyphs
[TEXT_AREA
]
717 = row
->glyphs
[LEFT_MARGIN_AREA
];
718 row
->glyphs
[RIGHT_MARGIN_AREA
]
719 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
720 row
->glyphs
[LAST_AREA
]
721 = row
->glyphs
[RIGHT_MARGIN_AREA
];
725 row
->glyphs
[TEXT_AREA
]
726 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
727 row
->glyphs
[RIGHT_MARGIN_AREA
]
728 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
729 row
->glyphs
[LAST_AREA
]
730 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
734 matrix
->left_margin_glyphs
= left
;
735 matrix
->right_margin_glyphs
= right
;
739 /* If MATRIX->pool is null, MATRIX is responsible for managing
740 its own memory. It is a window matrix for window-based redisplay.
741 Allocate glyph memory from the heap. */
742 if (dim
.width
> matrix
->matrix_w
744 || header_line_changed_p
745 || marginal_areas_changed_p
)
747 struct glyph_row
*row
= matrix
->rows
;
748 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
752 row
->glyphs
[LEFT_MARGIN_AREA
]
753 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
755 * sizeof (struct glyph
)));
757 /* The mode line never has marginal areas. */
758 if (row
== matrix
->rows
+ dim
.height
- 1
759 || (row
== matrix
->rows
&& matrix
->header_line_p
))
761 row
->glyphs
[TEXT_AREA
]
762 = row
->glyphs
[LEFT_MARGIN_AREA
];
763 row
->glyphs
[RIGHT_MARGIN_AREA
]
764 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
765 row
->glyphs
[LAST_AREA
]
766 = row
->glyphs
[RIGHT_MARGIN_AREA
];
770 row
->glyphs
[TEXT_AREA
]
771 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
772 row
->glyphs
[RIGHT_MARGIN_AREA
]
773 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
774 row
->glyphs
[LAST_AREA
]
775 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
781 xassert (left
>= 0 && right
>= 0);
782 matrix
->left_margin_glyphs
= left
;
783 matrix
->right_margin_glyphs
= right
;
786 /* Number of rows to be used by MATRIX. */
787 matrix
->nrows
= dim
.height
;
788 xassert (matrix
->nrows
>= 0);
792 if (matrix
== w
->current_matrix
)
794 /* Mark rows in a current matrix of a window as not having
795 valid contents. It's important to not do this for
796 desired matrices. When Emacs starts, it may already be
797 building desired matrices when this function runs. */
798 if (window_width
< 0)
799 window_width
= window_box_width (w
, -1);
801 /* Optimize the case that only the height has changed (C-x 2,
802 upper window). Invalidate all rows that are no longer part
804 if (!marginal_areas_changed_p
805 && !header_line_changed_p
807 && dim
.width
== matrix
->matrix_w
808 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
809 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
810 && matrix
->window_width
== window_width
)
812 /* Find the last row in the window. */
813 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
814 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
820 /* Window end is invalid, if inside of the rows that
821 are invalidated below. */
822 if (INTEGERP (w
->window_end_vpos
)
823 && XFASTINT (w
->window_end_vpos
) >= i
)
824 w
->window_end_valid
= Qnil
;
826 while (i
< matrix
->nrows
)
827 matrix
->rows
[i
++].enabled_p
= 0;
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
835 else if (matrix
== w
->desired_matrix
)
837 /* Rows in desired matrices always have to be cleared;
838 redisplay expects this is the case when it runs, so it
839 had better be the case when we adjust matrices between
841 for (i
= 0; i
< matrix
->nrows
; ++i
)
842 matrix
->rows
[i
].enabled_p
= 0;
847 /* Remember last values to be able to optimize frame redraws. */
848 matrix
->matrix_x
= x
;
849 matrix
->matrix_y
= y
;
850 matrix
->matrix_w
= dim
.width
;
851 matrix
->matrix_h
= dim
.height
;
853 /* Record the top y location and height of W at the time the matrix
854 was last adjusted. This is used to optimize redisplay above. */
857 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
858 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
859 matrix
->window_height
= window_height
;
860 matrix
->window_width
= window_width
;
861 matrix
->window_vscroll
= w
->vscroll
;
866 /* Reverse the contents of rows in MATRIX between START and END. The
867 contents of the row at END - 1 end up at START, END - 2 at START +
868 1 etc. This is part of the implementation of rotate_matrix (see
872 reverse_rows (matrix
, start
, end
)
873 struct glyph_matrix
*matrix
;
878 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
880 /* Non-ISO HP/UX compiler doesn't like auto struct
882 struct glyph_row temp
;
883 temp
= matrix
->rows
[i
];
884 matrix
->rows
[i
] = matrix
->rows
[j
];
885 matrix
->rows
[j
] = temp
;
890 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
891 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
892 indices. (Note: this does not copy glyphs, only glyph pointers in
893 row structures are moved around).
895 The algorithm used for rotating the vector was, I believe, first
896 described by Kernighan. See the vector R as consisting of two
897 sub-vectors AB, where A has length BY for BY >= 0. The result
898 after rotating is then BA. Reverse both sub-vectors to get ArBr
899 and reverse the result to get (ArBr)r which is BA. Similar for
903 rotate_matrix (matrix
, first
, last
, by
)
904 struct glyph_matrix
*matrix
;
909 /* Up (rotate left, i.e. towards lower indices). */
911 reverse_rows (matrix
, first
, first
+ by
);
912 reverse_rows (matrix
, first
+ by
, last
);
913 reverse_rows (matrix
, first
, last
);
917 /* Down (rotate right, i.e. towards higher indices). */
918 reverse_rows (matrix
, last
- by
, last
);
919 reverse_rows (matrix
, first
, last
- by
);
920 reverse_rows (matrix
, first
, last
);
925 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
926 with indices START <= index < END. Increment positions by DELTA/
930 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
931 struct glyph_matrix
*matrix
;
932 int start
, end
, delta
, delta_bytes
;
934 /* Check that START and END are reasonable values. */
935 xassert (start
>= 0 && start
<= matrix
->nrows
);
936 xassert (end
>= 0 && end
<= matrix
->nrows
);
937 xassert (start
<= end
);
939 for (; start
< end
; ++start
)
940 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
944 /* Enable a range of rows in glyph matrix MATRIX. START and END are
945 the row indices of the first and last + 1 row to enable. If
946 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
949 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
950 struct glyph_matrix
*matrix
;
954 xassert (start
<= end
);
955 xassert (start
>= 0 && start
< matrix
->nrows
);
956 xassert (end
>= 0 && end
<= matrix
->nrows
);
958 for (; start
< end
; ++start
)
959 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
965 This empties all rows in MATRIX by setting the enabled_p flag for
966 all rows of the matrix to zero. The function prepare_desired_row
967 will eventually really clear a row when it sees one with a zero
970 Resets update hints to defaults value. The only update hint
971 currently present is the flag MATRIX->no_scrolling_p. */
974 clear_glyph_matrix (matrix
)
975 struct glyph_matrix
*matrix
;
979 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
980 matrix
->no_scrolling_p
= 0;
985 /* Shift part of the glyph matrix MATRIX of window W up or down.
986 Increment y-positions in glyph rows between START and END by DY,
987 and recompute their visible height. */
990 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
992 struct glyph_matrix
*matrix
;
997 xassert (start
<= end
);
998 xassert (start
>= 0 && start
< matrix
->nrows
);
999 xassert (end
>= 0 && end
<= matrix
->nrows
);
1001 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1002 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1004 for (; start
< end
; ++start
)
1006 struct glyph_row
*row
= &matrix
->rows
[start
];
1009 row
->visible_height
= row
->height
;
1012 row
->visible_height
-= min_y
- row
->y
;
1013 if (row
->y
+ row
->height
> max_y
)
1014 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1019 /* Mark all rows in current matrices of frame F as invalid. Marking
1020 invalid is done by setting enabled_p to zero for all rows in a
1024 clear_current_matrices (f
)
1025 register struct frame
*f
;
1027 /* Clear frame current matrix, if we have one. */
1028 if (f
->current_matrix
)
1029 clear_glyph_matrix (f
->current_matrix
);
1031 /* Clear the matrix of the menu bar window, if such a window exists.
1032 The menu bar window is currently used to display menus on X when
1033 no toolkit support is compiled in. */
1034 if (WINDOWP (f
->menu_bar_window
))
1035 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1037 /* Clear the matrix of the tool-bar window, if any. */
1038 if (WINDOWP (f
->tool_bar_window
))
1039 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1041 /* Clear current window matrices. */
1042 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1043 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1047 /* Clear out all display lines of F for a coming redisplay. */
1050 clear_desired_matrices (f
)
1051 register struct frame
*f
;
1053 if (f
->desired_matrix
)
1054 clear_glyph_matrix (f
->desired_matrix
);
1056 if (WINDOWP (f
->menu_bar_window
))
1057 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1059 if (WINDOWP (f
->tool_bar_window
))
1060 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1062 /* Do it for window matrices. */
1063 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1064 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1068 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1069 non-zero clear desired matrices, otherwise clear current matrices. */
1072 clear_window_matrices (w
, desired_p
)
1078 if (!NILP (w
->hchild
))
1080 xassert (WINDOWP (w
->hchild
));
1081 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1083 else if (!NILP (w
->vchild
))
1085 xassert (WINDOWP (w
->vchild
));
1086 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1091 clear_glyph_matrix (w
->desired_matrix
);
1094 clear_glyph_matrix (w
->current_matrix
);
1095 w
->window_end_valid
= Qnil
;
1099 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1105 /***********************************************************************
1108 See dispextern.h for an overall explanation of glyph rows.
1109 ***********************************************************************/
1111 /* Clear glyph row ROW. Do it in a way that makes it robust against
1112 changes in the glyph_row structure, i.e. addition or removal of
1113 structure members. */
1115 static struct glyph_row null_row
;
1118 clear_glyph_row (row
)
1119 struct glyph_row
*row
;
1121 struct glyph
*p
[1 + LAST_AREA
];
1123 /* Save pointers. */
1124 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1125 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1126 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1127 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1132 /* Restore pointers. */
1133 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1134 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1135 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1136 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1138 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1139 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1140 Redisplay outputs such glyphs, and flickering effects were
1141 the result. This also depended on the contents of memory
1142 returned by xmalloc. If flickering happens again, activate
1143 the code below. If the flickering is gone with that, chances
1144 are that the flickering has the same reason as here. */
1145 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1150 /* Make ROW an empty, enabled row of canonical character height,
1151 in window W starting at y-position Y. */
1154 blank_row (w
, row
, y
)
1156 struct glyph_row
*row
;
1161 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1162 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1164 clear_glyph_row (row
);
1166 row
->ascent
= row
->phys_ascent
= 0;
1167 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1168 row
->visible_height
= row
->height
;
1171 row
->visible_height
-= min_y
- row
->y
;
1172 if (row
->y
+ row
->height
> max_y
)
1173 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1179 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1180 are the amounts by which to change positions. Note that the first
1181 glyph of the text area of a row can have a buffer position even if
1182 the used count of the text area is zero. Such rows display line
1186 increment_row_positions (row
, delta
, delta_bytes
)
1187 struct glyph_row
*row
;
1188 int delta
, delta_bytes
;
1192 /* Increment start and end positions. */
1193 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1194 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1195 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1196 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1198 if (!row
->enabled_p
)
1201 /* Increment positions in glyphs. */
1202 for (area
= 0; area
< LAST_AREA
; ++area
)
1203 for (i
= 0; i
< row
->used
[area
]; ++i
)
1204 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1205 && row
->glyphs
[area
][i
].charpos
> 0)
1206 row
->glyphs
[area
][i
].charpos
+= delta
;
1208 /* Capture the case of rows displaying a line end. */
1209 if (row
->used
[TEXT_AREA
] == 0
1210 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1211 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1216 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1217 contents, i.e. glyph structure contents are exchanged between A and
1218 B without changing glyph pointers in A and B. */
1221 swap_glyphs_in_rows (a
, b
)
1222 struct glyph_row
*a
, *b
;
1226 for (area
= 0; area
< LAST_AREA
; ++area
)
1228 /* Number of glyphs to swap. */
1229 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1231 /* Start of glyphs in area of row A. */
1232 struct glyph
*glyph_a
= a
->glyphs
[area
];
1234 /* End + 1 of glyphs in area of row A. */
1235 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1237 /* Start of glyphs in area of row B. */
1238 struct glyph
*glyph_b
= b
->glyphs
[area
];
1240 while (glyph_a
< glyph_a_end
)
1242 /* Non-ISO HP/UX compiler doesn't like auto struct
1246 *glyph_a
= *glyph_b
;
1256 /* Exchange pointers to glyph memory between glyph rows A and B. */
1259 swap_glyph_pointers (a
, b
)
1260 struct glyph_row
*a
, *b
;
1263 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1265 struct glyph
*temp
= a
->glyphs
[i
];
1266 a
->glyphs
[i
] = b
->glyphs
[i
];
1267 b
->glyphs
[i
] = temp
;
1272 /* Copy glyph row structure FROM to glyph row structure TO, except
1273 that glyph pointers in the structures are left unchanged. */
1276 copy_row_except_pointers (to
, from
)
1277 struct glyph_row
*to
, *from
;
1279 struct glyph
*pointers
[1 + LAST_AREA
];
1281 /* Save glyph pointers of TO. */
1282 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1284 /* Do a structure assignment. */
1287 /* Restore original pointers of TO. */
1288 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1292 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1293 TO and FROM are left unchanged. Glyph contents are copied from the
1294 glyph memory of FROM to the glyph memory of TO. Increment buffer
1295 positions in row TO by DELTA/ DELTA_BYTES. */
1298 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1299 struct glyph_row
*to
, *from
;
1300 int delta
, delta_bytes
;
1304 /* This is like a structure assignment TO = FROM, except that
1305 glyph pointers in the rows are left unchanged. */
1306 copy_row_except_pointers (to
, from
);
1308 /* Copy glyphs from FROM to TO. */
1309 for (area
= 0; area
< LAST_AREA
; ++area
)
1310 if (from
->used
[area
])
1311 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1312 from
->used
[area
] * sizeof (struct glyph
));
1314 /* Increment buffer positions in TO by DELTA. */
1315 increment_row_positions (to
, delta
, delta_bytes
);
1319 /* Assign glyph row FROM to glyph row TO. This works like a structure
1320 assignment TO = FROM, except that glyph pointers are not copied but
1321 exchanged between TO and FROM. Pointers must be exchanged to avoid
1325 assign_row (to
, from
)
1326 struct glyph_row
*to
, *from
;
1328 swap_glyph_pointers (to
, from
);
1329 copy_row_except_pointers (to
, from
);
1333 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1334 a row in a window matrix, is a slice of the glyph memory of the
1335 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1336 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1337 memory of FRAME_ROW. */
1342 glyph_row_slice_p (window_row
, frame_row
)
1343 struct glyph_row
*window_row
, *frame_row
;
1345 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1346 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1347 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1349 return (frame_glyph_start
<= window_glyph_start
1350 && window_glyph_start
< frame_glyph_end
);
1353 #endif /* GLYPH_DEBUG */
1357 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1358 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1359 in WINDOW_MATRIX is found satisfying the condition. */
1361 static struct glyph_row
*
1362 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1363 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1368 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1370 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1371 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1372 frame_matrix
->rows
+ row
))
1375 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1380 /* Prepare ROW for display. Desired rows are cleared lazily,
1381 i.e. they are only marked as to be cleared by setting their
1382 enabled_p flag to zero. When a row is to be displayed, a prior
1383 call to this function really clears it. */
1386 prepare_desired_row (row
)
1387 struct glyph_row
*row
;
1389 if (!row
->enabled_p
)
1391 clear_glyph_row (row
);
1397 /* Return a hash code for glyph row ROW. */
1400 line_hash_code (row
)
1401 struct glyph_row
*row
;
1407 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1408 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1412 int c
= glyph
->u
.ch
;
1413 int face_id
= glyph
->face_id
;
1414 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1416 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1417 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1429 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1430 the number of characters in the line. If must_write_spaces is
1431 zero, leading and trailing spaces are ignored. */
1434 line_draw_cost (matrix
, vpos
)
1435 struct glyph_matrix
*matrix
;
1438 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1439 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1440 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1442 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1443 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1445 /* Ignore trailing and leading spaces if we can. */
1446 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1448 /* Skip from the end over trailing spaces. */
1449 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1452 /* All blank line. */
1456 /* Skip over leading spaces. */
1457 while (CHAR_GLYPH_SPACE_P (*beg
))
1461 /* If we don't have a glyph-table, each glyph is one character,
1462 so return the number of glyphs. */
1463 if (glyph_table_base
== 0)
1467 /* Otherwise, scan the glyphs and accumulate their total length
1474 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1476 if (GLYPH_INVALID_P (g
)
1477 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1480 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1490 /* Test two glyph rows A and B for equality. Value is non-zero if A
1491 and B have equal contents. W is the window to which the glyphs
1492 rows A and B belong. It is needed here to test for partial row
1493 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1494 flags of A and B, too. */
1497 row_equal_p (w
, a
, b
, mouse_face_p
)
1499 struct glyph_row
*a
, *b
;
1504 else if (a
->hash
!= b
->hash
)
1508 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1511 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1514 /* Compare glyphs. */
1515 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1517 if (a
->used
[area
] != b
->used
[area
])
1520 a_glyph
= a
->glyphs
[area
];
1521 a_end
= a_glyph
+ a
->used
[area
];
1522 b_glyph
= b
->glyphs
[area
];
1524 while (a_glyph
< a_end
1525 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1526 ++a_glyph
, ++b_glyph
;
1528 if (a_glyph
!= a_end
)
1532 if (a
->fill_line_p
!= b
->fill_line_p
1533 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1534 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1535 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1536 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1537 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1538 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1539 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1540 || a
->overlapped_p
!= b
->overlapped_p
1541 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1542 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1543 /* Different partially visible characters on left margin. */
1545 /* Different height. */
1546 || a
->ascent
!= b
->ascent
1547 || a
->phys_ascent
!= b
->phys_ascent
1548 || a
->phys_height
!= b
->phys_height
1549 || a
->visible_height
!= b
->visible_height
)
1558 /***********************************************************************
1561 See dispextern.h for an overall explanation of glyph pools.
1562 ***********************************************************************/
1564 /* Allocate a glyph_pool structure. The structure returned is
1565 initialized with zeros. The global variable glyph_pool_count is
1566 incremented for each pool allocated. */
1568 static struct glyph_pool
*
1571 struct glyph_pool
*result
;
1573 /* Allocate a new glyph_pool and clear it. */
1574 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1575 bzero (result
, sizeof *result
);
1577 /* For memory leak and double deletion checking. */
1584 /* Free a glyph_pool structure POOL. The function may be called with
1585 a null POOL pointer. The global variable glyph_pool_count is
1586 decremented with every pool structure freed. If this count gets
1587 negative, more structures were freed than allocated, i.e. one
1588 structure must have been freed more than once or a bogus pointer
1589 was passed to free_glyph_pool. */
1592 free_glyph_pool (pool
)
1593 struct glyph_pool
*pool
;
1597 /* More freed than allocated? */
1599 xassert (glyph_pool_count
>= 0);
1601 xfree (pool
->glyphs
);
1607 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1608 columns we need. This function never shrinks a pool. The only
1609 case in which this would make sense, would be when a frame's size
1610 is changed from a large value to a smaller one. But, if someone
1611 does it once, we can expect that he will do it again.
1613 Value is non-zero if the pool changed in a way which makes
1614 re-adjusting window glyph matrices necessary. */
1617 realloc_glyph_pool (pool
, matrix_dim
)
1618 struct glyph_pool
*pool
;
1619 struct dim matrix_dim
;
1624 changed_p
= (pool
->glyphs
== 0
1625 || matrix_dim
.height
!= pool
->nrows
1626 || matrix_dim
.width
!= pool
->ncolumns
);
1628 /* Enlarge the glyph pool. */
1629 needed
= matrix_dim
.width
* matrix_dim
.height
;
1630 if (needed
> pool
->nglyphs
)
1632 int size
= needed
* sizeof (struct glyph
);
1635 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1638 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1639 bzero (pool
->glyphs
, size
);
1642 pool
->nglyphs
= needed
;
1645 /* Remember the number of rows and columns because (a) we use them
1646 to do sanity checks, and (b) the number of columns determines
1647 where rows in the frame matrix start---this must be available to
1648 determine pointers to rows of window sub-matrices. */
1649 pool
->nrows
= matrix_dim
.height
;
1650 pool
->ncolumns
= matrix_dim
.width
;
1657 /***********************************************************************
1659 ***********************************************************************/
1664 /* Flush standard output. This is sometimes useful to call from the debugger.
1665 XXX Maybe this should be changed to flush the current terminal instead of
1676 /* Check that no glyph pointers have been lost in MATRIX. If a
1677 pointer has been lost, e.g. by using a structure assignment between
1678 rows, at least one pointer must occur more than once in the rows of
1682 check_matrix_pointer_lossage (matrix
)
1683 struct glyph_matrix
*matrix
;
1687 for (i
= 0; i
< matrix
->nrows
; ++i
)
1688 for (j
= 0; j
< matrix
->nrows
; ++j
)
1690 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1691 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1695 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1698 matrix_row (matrix
, row
)
1699 struct glyph_matrix
*matrix
;
1702 xassert (matrix
&& matrix
->rows
);
1703 xassert (row
>= 0 && row
< matrix
->nrows
);
1705 /* That's really too slow for normal testing because this function
1706 is called almost everywhere. Although---it's still astonishingly
1707 fast, so it is valuable to have for debugging purposes. */
1709 check_matrix_pointer_lossage (matrix
);
1712 return matrix
->rows
+ row
;
1716 #if 0 /* This function makes invalid assumptions when text is
1717 partially invisible. But it might come handy for debugging
1720 /* Check invariants that must hold for an up to date current matrix of
1724 check_matrix_invariants (w
)
1727 struct glyph_matrix
*matrix
= w
->current_matrix
;
1728 int yb
= window_text_bottom_y (w
);
1729 struct glyph_row
*row
= matrix
->rows
;
1730 struct glyph_row
*last_text_row
= NULL
;
1731 struct buffer
*saved
= current_buffer
;
1732 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1735 /* This can sometimes happen for a fresh window. */
1736 if (matrix
->nrows
< 2)
1739 set_buffer_temp (buffer
);
1741 /* Note: last row is always reserved for the mode line. */
1742 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1743 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1745 struct glyph_row
*next
= row
+ 1;
1747 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1748 last_text_row
= row
;
1750 /* Check that character and byte positions are in sync. */
1751 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1752 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1754 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1755 have such a position temporarily in case of a minibuffer
1756 displaying something like `[Sole completion]' at its end. */
1757 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1758 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1759 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1761 /* Check that end position of `row' is equal to start position
1763 /* WARNING: This assumption is blatantly incorrect when we are
1764 reordering bdirectional text for display!! */
1765 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1767 xassert (MATRIX_ROW_END_CHARPOS (row
)
1768 == MATRIX_ROW_START_CHARPOS (next
));
1769 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1770 == MATRIX_ROW_START_BYTEPOS (next
));
1775 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1776 xassert (w
->desired_matrix
->rows
!= NULL
);
1777 set_buffer_temp (saved
);
1782 #endif /* GLYPH_DEBUG != 0 */
1786 /**********************************************************************
1787 Allocating/ Adjusting Glyph Matrices
1788 **********************************************************************/
1790 /* Allocate glyph matrices over a window tree for a frame-based
1793 X and Y are column/row within the frame glyph matrix where
1794 sub-matrices for the window tree rooted at WINDOW must be
1795 allocated. DIM_ONLY_P non-zero means that the caller of this
1796 function is only interested in the result matrix dimension, and
1797 matrix adjustments should not be performed.
1799 The function returns the total width/height of the sub-matrices of
1800 the window tree. If called on a frame root window, the computation
1801 will take the mini-buffer window into account.
1803 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1805 NEW_LEAF_MATRIX set if any window in the tree did not have a
1806 glyph matrices yet, and
1808 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1809 any window in the tree will be changed or have been changed (see
1812 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1815 Windows are arranged into chains of windows on the same level
1816 through the next fields of window structures. Such a level can be
1817 either a sequence of horizontally adjacent windows from left to
1818 right, or a sequence of vertically adjacent windows from top to
1819 bottom. Each window in a horizontal sequence can be either a leaf
1820 window or a vertical sequence; a window in a vertical sequence can
1821 be either a leaf or a horizontal sequence. All windows in a
1822 horizontal sequence have the same height, and all windows in a
1823 vertical sequence have the same width.
1825 This function uses, for historical reasons, a more general
1826 algorithm to determine glyph matrix dimensions that would be
1829 The matrix height of a horizontal sequence is determined by the
1830 maximum height of any matrix in the sequence. The matrix width of
1831 a horizontal sequence is computed by adding up matrix widths of
1832 windows in the sequence.
1834 |<------- result width ------->|
1835 +---------+----------+---------+ ---
1838 +---------+ | | result height
1843 The matrix width of a vertical sequence is the maximum matrix width
1844 of any window in the sequence. Its height is computed by adding up
1845 matrix heights of windows in the sequence.
1847 |<---- result width -->|
1855 +------------+---------+ |
1858 +------------+---------+ --- */
1860 /* Bit indicating that a new matrix will be allocated or has been
1863 #define NEW_LEAF_MATRIX (1 << 0)
1865 /* Bit indicating that a matrix will or has changed its location or
1868 #define CHANGED_LEAF_MATRIX (1 << 1)
1871 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1872 window_change_flags
)
1876 int *window_change_flags
;
1878 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1880 int wmax
= 0, hmax
= 0;
1884 int in_horz_combination_p
;
1886 /* What combination is WINDOW part of? Compute this once since the
1887 result is the same for all windows in the `next' chain. The
1888 special case of a root window (parent equal to nil) is treated
1889 like a vertical combination because a root window's `next'
1890 points to the mini-buffer window, if any, which is arranged
1891 vertically below other windows. */
1892 in_horz_combination_p
1893 = (!NILP (XWINDOW (window
)->parent
)
1894 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1896 /* For WINDOW and all windows on the same level. */
1899 w
= XWINDOW (window
);
1901 /* Get the dimension of the window sub-matrix for W, depending
1902 on whether this is a combination or a leaf window. */
1903 if (!NILP (w
->hchild
))
1904 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1906 window_change_flags
);
1907 else if (!NILP (w
->vchild
))
1908 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1910 window_change_flags
);
1913 /* If not already done, allocate sub-matrix structures. */
1914 if (w
->desired_matrix
== NULL
)
1916 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1917 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1918 *window_change_flags
|= NEW_LEAF_MATRIX
;
1921 /* Width and height MUST be chosen so that there are no
1922 holes in the frame matrix. */
1923 dim
.width
= required_matrix_width (w
);
1924 dim
.height
= required_matrix_height (w
);
1926 /* Will matrix be re-allocated? */
1927 if (x
!= w
->desired_matrix
->matrix_x
1928 || y
!= w
->desired_matrix
->matrix_y
1929 || dim
.width
!= w
->desired_matrix
->matrix_w
1930 || dim
.height
!= w
->desired_matrix
->matrix_h
1931 || (margin_glyphs_to_reserve (w
, dim
.width
,
1932 w
->left_margin_cols
)
1933 != w
->desired_matrix
->left_margin_glyphs
)
1934 || (margin_glyphs_to_reserve (w
, dim
.width
,
1935 w
->right_margin_cols
)
1936 != w
->desired_matrix
->right_margin_glyphs
))
1937 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1939 /* Actually change matrices, if allowed. Do not consider
1940 CHANGED_LEAF_MATRIX computed above here because the pool
1941 may have been changed which we don't now here. We trust
1942 that we only will be called with DIM_ONLY_P != 0 when
1946 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1947 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1951 /* If we are part of a horizontal combination, advance x for
1952 windows to the right of W; otherwise advance y for windows
1954 if (in_horz_combination_p
)
1959 /* Remember maximum glyph matrix dimensions. */
1960 wmax
= max (wmax
, dim
.width
);
1961 hmax
= max (hmax
, dim
.height
);
1963 /* Next window on same level. */
1966 while (!NILP (window
));
1968 /* Set `total' to the total glyph matrix dimension of this window
1969 level. In a vertical combination, the width is the width of the
1970 widest window; the height is the y we finally reached, corrected
1971 by the y we started with. In a horizontal combination, the total
1972 height is the height of the tallest window, and the width is the
1973 x we finally reached, corrected by the x we started with. */
1974 if (in_horz_combination_p
)
1976 total
.width
= x
- x0
;
1977 total
.height
= hmax
;
1982 total
.height
= y
- y0
;
1989 /* Return the required height of glyph matrices for window W. */
1992 required_matrix_height (w
)
1995 #ifdef HAVE_WINDOW_SYSTEM
1996 struct frame
*f
= XFRAME (w
->frame
);
1998 if (FRAME_WINDOW_P (f
))
2000 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2001 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
2002 return (((window_pixel_height
+ ch_height
- 1)
2003 / ch_height
) * w
->nrows_scale_factor
2004 /* One partially visible line at the top and
2005 bottom of the window. */
2007 /* 2 for header and mode line. */
2010 #endif /* HAVE_WINDOW_SYSTEM */
2012 return WINDOW_TOTAL_LINES (w
);
2016 /* Return the required width of glyph matrices for window W. */
2019 required_matrix_width (w
)
2022 #ifdef HAVE_WINDOW_SYSTEM
2023 struct frame
*f
= XFRAME (w
->frame
);
2024 if (FRAME_WINDOW_P (f
))
2026 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2027 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2029 /* Compute number of glyphs needed in a glyph row. */
2030 return (((window_pixel_width
+ ch_width
- 1)
2031 / ch_width
) * w
->ncols_scale_factor
2032 /* 2 partially visible columns in the text area. */
2034 /* One partially visible column at the right
2035 edge of each marginal area. */
2038 #endif /* HAVE_WINDOW_SYSTEM */
2040 return XINT (w
->total_cols
);
2044 /* Allocate window matrices for window-based redisplay. W is the
2045 window whose matrices must be allocated/reallocated. */
2048 allocate_matrices_for_window_redisplay (w
)
2053 if (!NILP (w
->vchild
))
2054 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2055 else if (!NILP (w
->hchild
))
2056 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2059 /* W is a leaf window. */
2062 /* If matrices are not yet allocated, allocate them now. */
2063 if (w
->desired_matrix
== NULL
)
2065 w
->desired_matrix
= new_glyph_matrix (NULL
);
2066 w
->current_matrix
= new_glyph_matrix (NULL
);
2069 dim
.width
= required_matrix_width (w
);
2070 dim
.height
= required_matrix_height (w
);
2071 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2072 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2075 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2080 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2081 do it for all frames; otherwise do it just for the given frame.
2082 This function must be called when a new frame is created, its size
2083 changes, or its window configuration changes. */
2089 /* Block input so that expose events and other events that access
2090 glyph matrices are not processed while we are changing them. */
2094 adjust_frame_glyphs (f
);
2097 Lisp_Object tail
, lisp_frame
;
2099 FOR_EACH_FRAME (tail
, lisp_frame
)
2100 adjust_frame_glyphs (XFRAME (lisp_frame
));
2107 /* Adjust frame glyphs when Emacs is initialized.
2109 To be called from init_display.
2111 We need a glyph matrix because redraw will happen soon.
2112 Unfortunately, window sizes on selected_frame are not yet set to
2113 meaningful values. I believe we can assume that there are only two
2114 windows on the frame---the mini-buffer and the root window. Frame
2115 height and width seem to be correct so far. So, set the sizes of
2116 windows to estimated values. */
2119 adjust_frame_glyphs_initially ()
2121 struct frame
*sf
= SELECTED_FRAME ();
2122 struct window
*root
= XWINDOW (sf
->root_window
);
2123 struct window
*mini
= XWINDOW (root
->next
);
2124 int frame_lines
= FRAME_LINES (sf
);
2125 int frame_cols
= FRAME_COLS (sf
);
2126 int top_margin
= FRAME_TOP_MARGIN (sf
);
2128 /* Do it for the root window. */
2129 XSETFASTINT (root
->top_line
, top_margin
);
2130 XSETFASTINT (root
->total_cols
, frame_cols
);
2131 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2133 /* Do it for the mini-buffer window. */
2134 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2135 XSETFASTINT (mini
->total_cols
, frame_cols
);
2136 set_window_height (root
->next
, 1, 0);
2138 adjust_frame_glyphs (sf
);
2139 glyphs_initialized_initially_p
= 1;
2143 /* Allocate/reallocate glyph matrices of a single frame F. */
2146 adjust_frame_glyphs (f
)
2149 if (FRAME_WINDOW_P (f
))
2150 adjust_frame_glyphs_for_window_redisplay (f
);
2152 adjust_frame_glyphs_for_frame_redisplay (f
);
2154 /* Don't forget the message buffer and the buffer for
2155 decode_mode_spec. */
2156 adjust_frame_message_buffer (f
);
2157 adjust_decode_mode_spec_buffer (f
);
2159 f
->glyphs_initialized_p
= 1;
2162 /* Return 1 if any window in the tree has nonzero window margins. See
2163 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2165 showing_window_margins_p (w
)
2170 if (!NILP (w
->hchild
))
2172 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2175 else if (!NILP (w
->vchild
))
2177 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2180 else if (!NILP (w
->left_margin_cols
)
2181 || !NILP (w
->right_margin_cols
))
2184 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2190 /* In the window tree with root W, build current matrices of leaf
2191 windows from the frame's current matrix. */
2194 fake_current_matrices (window
)
2199 for (; !NILP (window
); window
= w
->next
)
2201 w
= XWINDOW (window
);
2203 if (!NILP (w
->hchild
))
2204 fake_current_matrices (w
->hchild
);
2205 else if (!NILP (w
->vchild
))
2206 fake_current_matrices (w
->vchild
);
2210 struct frame
*f
= XFRAME (w
->frame
);
2211 struct glyph_matrix
*m
= w
->current_matrix
;
2212 struct glyph_matrix
*fm
= f
->current_matrix
;
2214 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2215 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2217 for (i
= 0; i
< m
->matrix_h
; ++i
)
2219 struct glyph_row
*r
= m
->rows
+ i
;
2220 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2222 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2223 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2225 r
->enabled_p
= fr
->enabled_p
;
2228 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2229 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2230 r
->used
[TEXT_AREA
] = (m
->matrix_w
2231 - r
->used
[LEFT_MARGIN_AREA
]
2232 - r
->used
[RIGHT_MARGIN_AREA
]);
2241 /* Save away the contents of frame F's current frame matrix. Value is
2242 a glyph matrix holding the contents of F's current frame matrix. */
2244 static struct glyph_matrix
*
2245 save_current_matrix (f
)
2249 struct glyph_matrix
*saved
;
2251 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2252 bzero (saved
, sizeof *saved
);
2253 saved
->nrows
= f
->current_matrix
->nrows
;
2254 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2255 * sizeof *saved
->rows
);
2256 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2258 for (i
= 0; i
< saved
->nrows
; ++i
)
2260 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2261 struct glyph_row
*to
= saved
->rows
+ i
;
2262 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2263 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2264 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2265 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2272 /* Restore the contents of frame F's current frame matrix from SAVED,
2273 and free memory associated with SAVED. */
2276 restore_current_matrix (f
, saved
)
2278 struct glyph_matrix
*saved
;
2282 for (i
= 0; i
< saved
->nrows
; ++i
)
2284 struct glyph_row
*from
= saved
->rows
+ i
;
2285 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2286 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2287 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2288 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2289 xfree (from
->glyphs
[TEXT_AREA
]);
2292 xfree (saved
->rows
);
2298 /* Allocate/reallocate glyph matrices of a single frame F for
2299 frame-based redisplay. */
2302 adjust_frame_glyphs_for_frame_redisplay (f
)
2305 struct dim matrix_dim
;
2307 int window_change_flags
;
2310 if (!FRAME_LIVE_P (f
))
2313 top_window_y
= FRAME_TOP_MARGIN (f
);
2315 /* Allocate glyph pool structures if not already done. */
2316 if (f
->desired_pool
== NULL
)
2318 f
->desired_pool
= new_glyph_pool ();
2319 f
->current_pool
= new_glyph_pool ();
2322 /* Allocate frames matrix structures if needed. */
2323 if (f
->desired_matrix
== NULL
)
2325 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2326 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2329 /* Compute window glyph matrices. (This takes the mini-buffer
2330 window into account). The result is the size of the frame glyph
2331 matrix needed. The variable window_change_flags is set to a bit
2332 mask indicating whether new matrices will be allocated or
2333 existing matrices change their size or location within the frame
2335 window_change_flags
= 0;
2337 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2340 &window_change_flags
);
2342 /* Add in menu bar lines, if any. */
2343 matrix_dim
.height
+= top_window_y
;
2345 /* Enlarge pools as necessary. */
2346 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2347 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2349 /* Set up glyph pointers within window matrices. Do this only if
2350 absolutely necessary since it requires a frame redraw. */
2351 if (pool_changed_p
|| window_change_flags
)
2353 /* Do it for window matrices. */
2354 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2356 &window_change_flags
);
2358 /* Size of frame matrices must equal size of frame. Note
2359 that we are called for X frames with window widths NOT equal
2360 to the frame width (from CHANGE_FRAME_SIZE_1). */
2361 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2362 && matrix_dim
.height
== FRAME_LINES (f
));
2364 /* Pointers to glyph memory in glyph rows are exchanged during
2365 the update phase of redisplay, which means in general that a
2366 frame's current matrix consists of pointers into both the
2367 desired and current glyph pool of the frame. Adjusting a
2368 matrix sets the frame matrix up so that pointers are all into
2369 the same pool. If we want to preserve glyph contents of the
2370 current matrix over a call to adjust_glyph_matrix, we must
2371 make a copy of the current glyphs, and restore the current
2372 matrix' contents from that copy. */
2373 if (display_completed
2374 && !FRAME_GARBAGED_P (f
)
2375 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2376 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2377 /* For some reason, the frame glyph matrix gets corrupted if
2378 any of the windows contain margins. I haven't been able
2379 to hunt down the reason, but for the moment this prevents
2380 the problem from manifesting. -- cyd */
2381 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2383 struct glyph_matrix
*copy
= save_current_matrix (f
);
2384 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2385 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2386 restore_current_matrix (f
, copy
);
2387 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2391 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2392 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2393 SET_FRAME_GARBAGED (f
);
2399 /* Allocate/reallocate glyph matrices of a single frame F for
2400 window-based redisplay. */
2403 adjust_frame_glyphs_for_window_redisplay (f
)
2408 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2410 /* Allocate/reallocate window matrices. */
2411 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2413 #ifdef HAVE_X_WINDOWS
2414 /* Allocate/ reallocate matrices of the dummy window used to display
2415 the menu bar under X when no X toolkit support is available. */
2416 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2418 /* Allocate a dummy window if not already done. */
2419 if (NILP (f
->menu_bar_window
))
2421 f
->menu_bar_window
= make_window ();
2422 w
= XWINDOW (f
->menu_bar_window
);
2423 XSETFRAME (w
->frame
, f
);
2424 w
->pseudo_window_p
= 1;
2427 w
= XWINDOW (f
->menu_bar_window
);
2429 /* Set window dimensions to frame dimensions and allocate or
2430 adjust glyph matrices of W. */
2431 XSETFASTINT (w
->top_line
, 0);
2432 XSETFASTINT (w
->left_col
, 0);
2433 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2434 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2435 allocate_matrices_for_window_redisplay (w
);
2437 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2438 #endif /* HAVE_X_WINDOWS */
2441 /* Allocate/ reallocate matrices of the tool bar window. If we
2442 don't have a tool bar window yet, make one. */
2443 if (NILP (f
->tool_bar_window
))
2445 f
->tool_bar_window
= make_window ();
2446 w
= XWINDOW (f
->tool_bar_window
);
2447 XSETFRAME (w
->frame
, f
);
2448 w
->pseudo_window_p
= 1;
2451 w
= XWINDOW (f
->tool_bar_window
);
2453 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2454 XSETFASTINT (w
->left_col
, 0);
2455 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2456 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2457 allocate_matrices_for_window_redisplay (w
);
2462 /* Adjust/ allocate message buffer of frame F.
2464 Note that the message buffer is never freed. Since I could not
2465 find a free in 19.34, I assume that freeing it would be
2466 problematic in some way and don't do it either.
2468 (Implementation note: It should be checked if we can free it
2469 eventually without causing trouble). */
2472 adjust_frame_message_buffer (f
)
2475 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2477 if (FRAME_MESSAGE_BUF (f
))
2479 char *buffer
= FRAME_MESSAGE_BUF (f
);
2480 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2481 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2484 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2488 /* Re-allocate buffer for decode_mode_spec on frame F. */
2491 adjust_decode_mode_spec_buffer (f
)
2494 f
->decode_mode_spec_buffer
2495 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2496 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2501 /**********************************************************************
2502 Freeing Glyph Matrices
2503 **********************************************************************/
2505 /* Free glyph memory for a frame F. F may be null. This function can
2506 be called for the same frame more than once. The root window of
2507 F may be nil when this function is called. This is the case when
2508 the function is called when F is destroyed. */
2514 if (f
&& f
->glyphs_initialized_p
)
2516 /* Block interrupt input so that we don't get surprised by an X
2517 event while we're in an inconsistent state. */
2519 f
->glyphs_initialized_p
= 0;
2521 /* Release window sub-matrices. */
2522 if (!NILP (f
->root_window
))
2523 free_window_matrices (XWINDOW (f
->root_window
));
2525 /* Free the dummy window for menu bars without X toolkit and its
2527 if (!NILP (f
->menu_bar_window
))
2529 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2530 free_glyph_matrix (w
->desired_matrix
);
2531 free_glyph_matrix (w
->current_matrix
);
2532 w
->desired_matrix
= w
->current_matrix
= NULL
;
2533 f
->menu_bar_window
= Qnil
;
2536 /* Free the tool bar window and its glyph matrices. */
2537 if (!NILP (f
->tool_bar_window
))
2539 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2540 free_glyph_matrix (w
->desired_matrix
);
2541 free_glyph_matrix (w
->current_matrix
);
2542 w
->desired_matrix
= w
->current_matrix
= NULL
;
2543 f
->tool_bar_window
= Qnil
;
2546 /* Release frame glyph matrices. Reset fields to zero in
2547 case we are called a second time. */
2548 if (f
->desired_matrix
)
2550 free_glyph_matrix (f
->desired_matrix
);
2551 free_glyph_matrix (f
->current_matrix
);
2552 f
->desired_matrix
= f
->current_matrix
= NULL
;
2555 /* Release glyph pools. */
2556 if (f
->desired_pool
)
2558 free_glyph_pool (f
->desired_pool
);
2559 free_glyph_pool (f
->current_pool
);
2560 f
->desired_pool
= f
->current_pool
= NULL
;
2568 /* Free glyph sub-matrices in the window tree rooted at W. This
2569 function may be called with a null pointer, and it may be called on
2570 the same tree more than once. */
2573 free_window_matrices (w
)
2578 if (!NILP (w
->hchild
))
2579 free_window_matrices (XWINDOW (w
->hchild
));
2580 else if (!NILP (w
->vchild
))
2581 free_window_matrices (XWINDOW (w
->vchild
));
2584 /* This is a leaf window. Free its memory and reset fields
2585 to zero in case this function is called a second time for
2587 free_glyph_matrix (w
->current_matrix
);
2588 free_glyph_matrix (w
->desired_matrix
);
2589 w
->current_matrix
= w
->desired_matrix
= NULL
;
2592 /* Next window on same level. */
2593 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2598 /* Check glyph memory leaks. This function is called from
2599 shut_down_emacs. Note that frames are not destroyed when Emacs
2600 exits. We therefore free all glyph memory for all active frames
2601 explicitly and check that nothing is left allocated. */
2604 check_glyph_memory ()
2606 Lisp_Object tail
, frame
;
2608 /* Free glyph memory for all frames. */
2609 FOR_EACH_FRAME (tail
, frame
)
2610 free_glyphs (XFRAME (frame
));
2612 /* Check that nothing is left allocated. */
2613 if (glyph_matrix_count
)
2615 if (glyph_pool_count
)
2621 /**********************************************************************
2622 Building a Frame Matrix
2623 **********************************************************************/
2625 /* Most of the redisplay code works on glyph matrices attached to
2626 windows. This is a good solution most of the time, but it is not
2627 suitable for terminal code. Terminal output functions cannot rely
2628 on being able to set an arbitrary terminal window. Instead they
2629 must be provided with a view of the whole frame, i.e. the whole
2630 screen. We build such a view by constructing a frame matrix from
2631 window matrices in this section.
2633 Windows that must be updated have their must_be_update_p flag set.
2634 For all such windows, their desired matrix is made part of the
2635 desired frame matrix. For other windows, their current matrix is
2636 made part of the desired frame matrix.
2638 +-----------------+----------------+
2639 | desired | desired |
2641 +-----------------+----------------+
2644 +----------------------------------+
2646 Desired window matrices can be made part of the frame matrix in a
2647 cheap way: We exploit the fact that the desired frame matrix and
2648 desired window matrices share their glyph memory. This is not
2649 possible for current window matrices. Their glyphs are copied to
2650 the desired frame matrix. The latter is equivalent to
2651 preserve_other_columns in the old redisplay.
2653 Used glyphs counters for frame matrix rows are the result of adding
2654 up glyph lengths of the window matrices. A line in the frame
2655 matrix is enabled, if a corresponding line in a window matrix is
2658 After building the desired frame matrix, it will be passed to
2659 terminal code, which will manipulate both the desired and current
2660 frame matrix. Changes applied to the frame's current matrix have
2661 to be visible in current window matrices afterwards, of course.
2663 This problem is solved like this:
2665 1. Window and frame matrices share glyphs. Window matrices are
2666 constructed in a way that their glyph contents ARE the glyph
2667 contents needed in a frame matrix. Thus, any modification of
2668 glyphs done in terminal code will be reflected in window matrices
2671 2. Exchanges of rows in a frame matrix done by terminal code are
2672 intercepted by hook functions so that corresponding row operations
2673 on window matrices can be performed. This is necessary because we
2674 use pointers to glyphs in glyph row structures. To satisfy the
2675 assumption of point 1 above that glyphs are updated implicitly in
2676 window matrices when they are manipulated via the frame matrix,
2677 window and frame matrix must of course agree where to find the
2678 glyphs for their rows. Possible manipulations that must be
2679 mirrored are assignments of rows of the desired frame matrix to the
2680 current frame matrix and scrolling the current frame matrix. */
2682 /* Build frame F's desired matrix from window matrices. Only windows
2683 which have the flag must_be_updated_p set have to be updated. Menu
2684 bar lines of a frame are not covered by window matrices, so make
2685 sure not to touch them in this function. */
2688 build_frame_matrix (f
)
2693 /* F must have a frame matrix when this function is called. */
2694 xassert (!FRAME_WINDOW_P (f
));
2696 /* Clear all rows in the frame matrix covered by window matrices.
2697 Menu bar lines are not covered by windows. */
2698 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2699 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2701 /* Build the matrix by walking the window tree. */
2702 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2703 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2707 /* Walk a window tree, building a frame matrix MATRIX from window
2708 matrices. W is the root of a window tree. */
2711 build_frame_matrix_from_window_tree (matrix
, w
)
2712 struct glyph_matrix
*matrix
;
2717 if (!NILP (w
->hchild
))
2718 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2719 else if (!NILP (w
->vchild
))
2720 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2722 build_frame_matrix_from_leaf_window (matrix
, w
);
2724 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2729 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2730 desired frame matrix built. W is a leaf window whose desired or
2731 current matrix is to be added to FRAME_MATRIX. W's flag
2732 must_be_updated_p determines which matrix it contributes to
2733 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2734 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2735 Adding a desired matrix means setting up used counters and such in
2736 frame rows, while adding a current window matrix to FRAME_MATRIX
2737 means copying glyphs. The latter case corresponds to
2738 preserve_other_columns in the old redisplay. */
2741 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2742 struct glyph_matrix
*frame_matrix
;
2745 struct glyph_matrix
*window_matrix
;
2746 int window_y
, frame_y
;
2747 /* If non-zero, a glyph to insert at the right border of W. */
2748 GLYPH right_border_glyph
;
2750 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2752 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2753 if (w
->must_be_updated_p
)
2755 window_matrix
= w
->desired_matrix
;
2757 /* Decide whether we want to add a vertical border glyph. */
2758 if (!WINDOW_RIGHTMOST_P (w
))
2760 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2763 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2765 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2766 && GLYPH_CODE_CHAR_VALID_P (gc
))
2768 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2769 spec_glyph_lookup_face (w
, &right_border_glyph
);
2772 if (GLYPH_FACE (right_border_glyph
) <= 0)
2773 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2777 window_matrix
= w
->current_matrix
;
2779 /* For all rows in the window matrix and corresponding rows in the
2782 frame_y
= window_matrix
->matrix_y
;
2783 while (window_y
< window_matrix
->nrows
)
2785 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2786 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2787 int current_row_p
= window_matrix
== w
->current_matrix
;
2789 /* Fill up the frame row with spaces up to the left margin of the
2791 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2793 /* Fill up areas in the window matrix row with spaces. */
2794 fill_up_glyph_row_with_spaces (window_row
);
2796 /* If only part of W's desired matrix has been built, and
2797 window_row wasn't displayed, use the corresponding current
2799 if (window_matrix
== w
->desired_matrix
2800 && !window_row
->enabled_p
)
2802 window_row
= w
->current_matrix
->rows
+ window_y
;
2808 /* Copy window row to frame row. */
2809 bcopy (window_row
->glyphs
[0],
2810 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2811 window_matrix
->matrix_w
* sizeof (struct glyph
));
2815 xassert (window_row
->enabled_p
);
2817 /* Only when a desired row has been displayed, we want
2818 the corresponding frame row to be updated. */
2819 frame_row
->enabled_p
= 1;
2821 /* Maybe insert a vertical border between horizontally adjacent
2823 if (GLYPH_CHAR (right_border_glyph
) != 0)
2825 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2826 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2830 /* Window row window_y must be a slice of frame row
2832 xassert (glyph_row_slice_p (window_row
, frame_row
));
2834 /* If rows are in sync, we don't have to copy glyphs because
2835 frame and window share glyphs. */
2837 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2838 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2842 /* Set number of used glyphs in the frame matrix. Since we fill
2843 up with spaces, and visit leaf windows from left to right it
2844 can be done simply. */
2845 frame_row
->used
[TEXT_AREA
]
2846 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2854 /* Given a user-specified glyph, possibly including a Lisp-level face
2855 ID, return a glyph that has a realized face ID.
2856 This is used for glyphs displayed specially and not part of the text;
2857 for instance, vertical separators, truncation markers, etc. */
2860 spec_glyph_lookup_face (w
, glyph
)
2864 int lface_id
= GLYPH_FACE (*glyph
);
2865 /* Convert the glyph's specified face to a realized (cache) face. */
2868 int face_id
= merge_faces (XFRAME (w
->frame
),
2869 Qt
, lface_id
, DEFAULT_FACE_ID
);
2870 SET_GLYPH_FACE (*glyph
, face_id
);
2874 /* Add spaces to a glyph row ROW in a window matrix.
2876 Each row has the form:
2878 +---------+-----------------------------+------------+
2879 | left | text | right |
2880 +---------+-----------------------------+------------+
2882 Left and right marginal areas are optional. This function adds
2883 spaces to areas so that there are no empty holes between areas.
2884 In other words: If the right area is not empty, the text area
2885 is filled up with spaces up to the right area. If the text area
2886 is not empty, the left area is filled up.
2888 To be called for frame-based redisplay, only. */
2891 fill_up_glyph_row_with_spaces (row
)
2892 struct glyph_row
*row
;
2894 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2895 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2896 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2900 /* Fill area AREA of glyph row ROW with spaces. To be called for
2901 frame-based redisplay only. */
2904 fill_up_glyph_row_area_with_spaces (row
, area
)
2905 struct glyph_row
*row
;
2908 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2910 struct glyph
*end
= row
->glyphs
[area
+ 1];
2911 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2914 *text
++ = space_glyph
;
2915 row
->used
[area
] = text
- row
->glyphs
[area
];
2920 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2921 reached. In frame matrices only one area, TEXT_AREA, is used. */
2924 fill_up_frame_row_with_spaces (row
, upto
)
2925 struct glyph_row
*row
;
2928 int i
= row
->used
[TEXT_AREA
];
2929 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2932 glyph
[i
++] = space_glyph
;
2934 row
->used
[TEXT_AREA
] = i
;
2939 /**********************************************************************
2940 Mirroring operations on frame matrices in window matrices
2941 **********************************************************************/
2943 /* Set frame being updated via frame-based redisplay to F. This
2944 function must be called before updates to make explicit that we are
2945 working on frame matrices or not. */
2948 set_frame_matrix_frame (f
)
2951 frame_matrix_frame
= f
;
2955 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2956 DESIRED_MATRIX is the desired matrix corresponding to
2957 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2958 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2959 frame_matrix_frame is non-null, this indicates that the exchange is
2960 done in frame matrices, and that we have to perform analogous
2961 operations in window matrices of frame_matrix_frame. */
2964 make_current (desired_matrix
, current_matrix
, row
)
2965 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2968 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2969 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2970 int mouse_face_p
= current_row
->mouse_face_p
;
2972 /* Do current_row = desired_row. This exchanges glyph pointers
2973 between both rows, and does a structure assignment otherwise. */
2974 assign_row (current_row
, desired_row
);
2976 /* Enable current_row to mark it as valid. */
2977 current_row
->enabled_p
= 1;
2978 current_row
->mouse_face_p
= mouse_face_p
;
2980 /* If we are called on frame matrices, perform analogous operations
2981 for window matrices. */
2982 if (frame_matrix_frame
)
2983 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2987 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2988 W's frame which has been made current (by swapping pointers between
2989 current and desired matrix). Perform analogous operations in the
2990 matrices of leaf windows in the window tree rooted at W. */
2993 mirror_make_current (w
, frame_row
)
2999 if (!NILP (w
->hchild
))
3000 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
3001 else if (!NILP (w
->vchild
))
3002 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3005 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3006 here because the checks performed in debug mode there
3007 will not allow the conversion. */
3008 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3010 /* If FRAME_ROW is within W, assign the desired row to the
3011 current row (exchanging glyph pointers). */
3012 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3014 struct glyph_row
*current_row
3015 = MATRIX_ROW (w
->current_matrix
, row
);
3016 struct glyph_row
*desired_row
3017 = MATRIX_ROW (w
->desired_matrix
, row
);
3019 if (desired_row
->enabled_p
)
3020 assign_row (current_row
, desired_row
);
3022 swap_glyph_pointers (desired_row
, current_row
);
3023 current_row
->enabled_p
= 1;
3027 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3032 /* Perform row dance after scrolling. We are working on the range of
3033 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3034 including) in MATRIX. COPY_FROM is a vector containing, for each
3035 row I in the range 0 <= I < NLINES, the index of the original line
3036 to move to I. This index is relative to the row range, i.e. 0 <=
3037 index < NLINES. RETAINED_P is a vector containing zero for each
3038 row 0 <= I < NLINES which is empty.
3040 This function is called from do_scrolling and do_direct_scrolling. */
3043 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3045 struct glyph_matrix
*matrix
;
3046 int unchanged_at_top
, nlines
;
3050 /* A copy of original rows. */
3051 struct glyph_row
*old_rows
;
3053 /* Rows to assign to. */
3054 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3058 /* Make a copy of the original rows. */
3059 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3060 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3062 /* Assign new rows, maybe clear lines. */
3063 for (i
= 0; i
< nlines
; ++i
)
3065 int enabled_before_p
= new_rows
[i
].enabled_p
;
3067 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3068 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3069 new_rows
[i
] = old_rows
[copy_from
[i
]];
3070 new_rows
[i
].enabled_p
= enabled_before_p
;
3072 /* RETAINED_P is zero for empty lines. */
3073 if (!retained_p
[copy_from
[i
]])
3074 new_rows
[i
].enabled_p
= 0;
3077 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3078 if (frame_matrix_frame
)
3079 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3080 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3084 /* Synchronize glyph pointers in the current matrix of window W with
3085 the current frame matrix. */
3088 sync_window_with_frame_matrix_rows (w
)
3091 struct frame
*f
= XFRAME (w
->frame
);
3092 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3093 int left
, right
, x
, width
;
3095 /* Preconditions: W must be a leaf window on a tty frame. */
3096 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3097 xassert (!FRAME_WINDOW_P (f
));
3099 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3100 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3101 x
= w
->current_matrix
->matrix_x
;
3102 width
= w
->current_matrix
->matrix_w
;
3104 window_row
= w
->current_matrix
->rows
;
3105 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3106 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3108 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3110 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3111 = frame_row
->glyphs
[0] + x
;
3112 window_row
->glyphs
[TEXT_AREA
]
3113 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3114 window_row
->glyphs
[LAST_AREA
]
3115 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3116 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3117 = window_row
->glyphs
[LAST_AREA
] - right
;
3122 /* Return the window in the window tree rooted in W containing frame
3123 row ROW. Value is null if none is found. */
3126 frame_row_to_window (w
, row
)
3130 struct window
*found
= NULL
;
3134 if (!NILP (w
->hchild
))
3135 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3136 else if (!NILP (w
->vchild
))
3137 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3138 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3139 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3142 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3149 /* Perform a line dance in the window tree rooted at W, after
3150 scrolling a frame matrix in mirrored_line_dance.
3152 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3153 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3154 COPY_FROM is a vector containing, for each row I in the range 0 <=
3155 I < NLINES, the index of the original line to move to I. This
3156 index is relative to the row range, i.e. 0 <= index < NLINES.
3157 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3161 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3163 int unchanged_at_top
, nlines
;
3169 if (!NILP (w
->hchild
))
3170 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3171 nlines
, copy_from
, retained_p
);
3172 else if (!NILP (w
->vchild
))
3173 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3174 nlines
, copy_from
, retained_p
);
3177 /* W is a leaf window, and we are working on its current
3179 struct glyph_matrix
*m
= w
->current_matrix
;
3181 struct glyph_row
*old_rows
;
3183 /* Make a copy of the original rows of matrix m. */
3184 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3185 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3187 for (i
= 0; i
< nlines
; ++i
)
3189 /* Frame relative line assigned to. */
3190 int frame_to
= i
+ unchanged_at_top
;
3192 /* Frame relative line assigned. */
3193 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3195 /* Window relative line assigned to. */
3196 int window_to
= frame_to
- m
->matrix_y
;
3198 /* Window relative line assigned. */
3199 int window_from
= frame_from
- m
->matrix_y
;
3201 /* Is assigned line inside window? */
3202 int from_inside_window_p
3203 = window_from
>= 0 && window_from
< m
->matrix_h
;
3205 /* Is assigned to line inside window? */
3206 int to_inside_window_p
3207 = window_to
>= 0 && window_to
< m
->matrix_h
;
3209 if (from_inside_window_p
&& to_inside_window_p
)
3211 /* Enabled setting before assignment. */
3212 int enabled_before_p
;
3214 /* Do the assignment. The enabled_p flag is saved
3215 over the assignment because the old redisplay did
3217 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3218 m
->rows
[window_to
] = old_rows
[window_from
];
3219 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3221 /* If frame line is empty, window line is empty, too. */
3222 if (!retained_p
[copy_from
[i
]])
3223 m
->rows
[window_to
].enabled_p
= 0;
3225 else if (to_inside_window_p
)
3227 /* A copy between windows. This is an infrequent
3228 case not worth optimizing. */
3229 struct frame
*f
= XFRAME (w
->frame
);
3230 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3232 struct glyph_matrix
*m2
;
3235 w2
= frame_row_to_window (root
, frame_from
);
3236 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3237 -nw', FROM_FRAME sometimes has no associated window.
3238 This check avoids a segfault if W2 is null. */
3241 m2
= w2
->current_matrix
;
3242 m2_from
= frame_from
- m2
->matrix_y
;
3243 copy_row_except_pointers (m
->rows
+ window_to
,
3244 m2
->rows
+ m2_from
);
3246 /* If frame line is empty, window line is empty, too. */
3247 if (!retained_p
[copy_from
[i
]])
3248 m
->rows
[window_to
].enabled_p
= 0;
3252 else if (from_inside_window_p
)
3256 /* If there was a copy between windows, make sure glyph
3257 pointers are in sync with the frame matrix. */
3259 sync_window_with_frame_matrix_rows (w
);
3261 /* Check that no pointers are lost. */
3265 /* Next window on same level. */
3266 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3273 /* Check that window and frame matrices agree about their
3274 understanding where glyphs of the rows are to find. For each
3275 window in the window tree rooted at W, check that rows in the
3276 matrices of leaf window agree with their frame matrices about
3280 check_window_matrix_pointers (w
)
3285 if (!NILP (w
->hchild
))
3286 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3287 else if (!NILP (w
->vchild
))
3288 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3291 struct frame
*f
= XFRAME (w
->frame
);
3292 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3293 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3296 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3301 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3302 a window and FRAME_MATRIX is the corresponding frame matrix. For
3303 each row in WINDOW_MATRIX check that it's a slice of the
3304 corresponding frame row. If it isn't, abort. */
3307 check_matrix_pointers (window_matrix
, frame_matrix
)
3308 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3310 /* Row number in WINDOW_MATRIX. */
3313 /* Row number corresponding to I in FRAME_MATRIX. */
3314 int j
= window_matrix
->matrix_y
;
3316 /* For all rows check that the row in the window matrix is a
3317 slice of the row in the frame matrix. If it isn't we didn't
3318 mirror an operation on the frame matrix correctly. */
3319 while (i
< window_matrix
->nrows
)
3321 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3322 frame_matrix
->rows
+ j
))
3328 #endif /* GLYPH_DEBUG != 0 */
3332 /**********************************************************************
3333 VPOS and HPOS translations
3334 **********************************************************************/
3338 /* Translate vertical position VPOS which is relative to window W to a
3339 vertical position relative to W's frame. */
3342 window_to_frame_vpos (w
, vpos
)
3346 struct frame
*f
= XFRAME (w
->frame
);
3348 xassert (!FRAME_WINDOW_P (f
));
3349 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3350 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3351 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3356 /* Translate horizontal position HPOS which is relative to window W to
3357 a horizontal position relative to W's frame. */
3360 window_to_frame_hpos (w
, hpos
)
3364 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3365 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3369 #endif /* GLYPH_DEBUG */
3373 /**********************************************************************
3375 **********************************************************************/
3377 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3378 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3384 CHECK_LIVE_FRAME (frame
);
3387 /* Ignore redraw requests, if frame has no glyphs yet.
3388 (Implementation note: It still has to be checked why we are
3389 called so early here). */
3390 if (!glyphs_initialized_initially_p
)
3395 if (FRAME_MSDOS_P (f
))
3396 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3399 clear_current_matrices (f
);
3401 if (FRAME_TERMCAP_P (f
))
3402 fflush (FRAME_TTY (f
)->output
);
3403 windows_or_buffers_changed
++;
3404 /* Mark all windows as inaccurate, so that every window will have
3405 its redisplay done. */
3406 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3407 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3413 /* Redraw frame F. This is nothing more than a call to the Lisp
3414 function redraw-frame. */
3421 XSETFRAME (frame
, f
);
3422 Fredraw_frame (frame
);
3426 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3427 doc
: /* Clear and redisplay all visible frames. */)
3430 Lisp_Object tail
, frame
;
3432 FOR_EACH_FRAME (tail
, frame
)
3433 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3434 Fredraw_frame (frame
);
3440 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3441 visible frames marked as garbaged. */
3444 redraw_garbaged_frames ()
3446 Lisp_Object tail
, frame
;
3448 FOR_EACH_FRAME (tail
, frame
)
3449 if (FRAME_VISIBLE_P (XFRAME (frame
))
3450 && FRAME_GARBAGED_P (XFRAME (frame
)))
3451 Fredraw_frame (frame
);
3456 /***********************************************************************
3458 ***********************************************************************/
3460 /* Try to update display and current glyph matrix directly.
3462 This function is called after a character G has been inserted into
3463 current_buffer. It tries to update the current glyph matrix and
3464 perform appropriate screen output to reflect the insertion. If it
3465 succeeds, the global flag redisplay_performed_directly_p will be
3466 set to 1, and thereby prevent the more costly general redisplay
3467 from running (see redisplay_internal).
3469 This function is not called for `hairy' character insertions.
3470 In particular, it is not called when after or before change
3471 functions exist, like they are used by font-lock. See keyboard.c
3472 for details where this function is called. */
3475 direct_output_for_insert (g
)
3478 register struct frame
*f
= SELECTED_FRAME ();
3479 struct window
*w
= XWINDOW (selected_window
);
3481 struct glyph_row
*glyph_row
;
3482 struct glyph
*glyphs
, *glyph
, *end
;
3484 /* Non-null means that redisplay of W is based on window matrices. */
3485 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3486 /* Non-null means we are in overwrite mode. */
3487 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3489 struct text_pos pos
;
3490 int delta
, delta_bytes
;
3492 /* Not done directly. */
3493 redisplay_performed_directly_p
= 0;
3495 /* Quickly give up for some common cases. */
3496 if (cursor_in_echo_area
3497 /* Give up if fonts have changed. */
3499 /* Give up if face attributes have been changed. */
3500 || face_change_count
3501 /* Give up if cursor position not really known. */
3502 || !display_completed
3503 /* Give up if buffer appears in two places. */
3504 || buffer_shared
> 1
3505 /* Give up if we need to reorder bidirectional text. */
3506 || !NILP (current_buffer
->bidi_display_reordering
)
3507 /* Give up if currently displaying a message instead of the
3508 minibuffer contents. */
3509 || (EQ (selected_window
, minibuf_window
)
3510 && EQ (minibuf_window
, echo_area_window
))
3511 /* Give up for hscrolled mini-buffer because display of the prompt
3512 is handled specially there (see display_line). */
3513 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3514 /* Give up if overwriting in the middle of a line. */
3517 && FETCH_BYTE (PT
) != '\n')
3518 /* Give up for tabs and line ends. */
3522 || (g
== ' ' && !NILP (current_buffer
->word_wrap
))
3523 /* Give up if unable to display the cursor in the window. */
3524 || w
->cursor
.vpos
< 0
3525 /* Give up if we are showing a message or just cleared the message
3526 because we might need to resize the echo area window. */
3527 || !NILP (echo_area_buffer
[0])
3528 || !NILP (echo_area_buffer
[1])
3529 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3530 /* Can't do it in a continued line because continuation
3531 lines would change. */
3532 (glyph_row
->continued_p
3533 || glyph_row
->exact_window_width_line_p
3534 /* Can't use this method if the line overlaps others or is
3535 overlapped by others because these other lines would
3536 have to be redisplayed. */
3537 || glyph_row
->overlapping_p
3538 || glyph_row
->overlapped_p
))
3539 /* Can't do it for partial width windows on terminal frames
3540 because we can't clear to eol in such a window. */
3541 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3544 /* If we can't insert glyphs, we can use this method only
3545 at the end of a line. */
3546 if (!FRAME_CHAR_INS_DEL_OK (f
))
3547 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3550 /* Set up a display iterator structure for W. Glyphs will be
3551 produced in scratch_glyph_row. Current position is W's cursor
3553 clear_glyph_row (&scratch_glyph_row
);
3554 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3555 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3556 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3559 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3560 if (glyph_row
->mouse_face_p
)
3563 /* Give up if highlighting trailing whitespace and we have trailing
3564 whitespace in glyph_row. We would have to remove the trailing
3565 whitespace face in that case. */
3566 if (!NILP (Vshow_trailing_whitespace
)
3567 && glyph_row
->used
[TEXT_AREA
])
3571 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3572 if (last
->type
== STRETCH_GLYPH
3573 || (last
->type
== CHAR_GLYPH
3574 && last
->u
.ch
== ' '))
3578 /* Give up if there are overlay strings at pos. This would fail
3579 if the overlay string has newlines in it. */
3580 if (STRINGP (it
.string
))
3583 it
.hpos
= w
->cursor
.hpos
;
3584 it
.vpos
= w
->cursor
.vpos
;
3585 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3586 it
.current_y
= w
->cursor
.y
;
3587 it
.end_charpos
= PT
;
3588 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3589 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3591 /* More than one display element may be returned for PT - 1 if
3592 (i) it's a control character which is translated into `\003' or
3593 `^C', or (ii) it has a display table entry, or (iii) it's a
3594 combination of both. */
3595 delta
= delta_bytes
= 0;
3596 while (get_next_display_element (&it
))
3598 PRODUCE_GLYPHS (&it
);
3600 /* Give up if glyph doesn't fit completely on the line. */
3601 if (it
.current_x
>= it
.last_visible_x
)
3604 /* Give up if new glyph has different ascent or descent than
3605 the original row, or if it is not a character glyph. */
3606 if (glyph_row
->ascent
!= it
.ascent
3607 || glyph_row
->height
!= it
.ascent
+ it
.descent
3608 || glyph_row
->phys_ascent
!= it
.phys_ascent
3609 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3610 || it
.what
!= IT_CHARACTER
)
3614 delta_bytes
+= it
.len
;
3615 set_iterator_to_next (&it
, 1, 0);
3618 /* Give up if we hit the right edge of the window. We would have
3619 to insert truncation or continuation glyphs. */
3620 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3621 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3624 /* Give up if there is a \t following in the line. */
3626 it2
.end_charpos
= ZV
;
3627 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3628 while (get_next_display_element (&it2
)
3629 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3633 set_iterator_to_next (&it2
, 1, 0);
3636 /* Number of new glyphs produced. */
3637 n
= it
.glyph_row
->used
[TEXT_AREA
];
3639 /* Start and end of glyphs in original row. */
3640 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3641 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3643 /* Make room for new glyphs, then insert them. */
3644 xassert (end
- glyphs
- n
>= 0);
3645 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3646 (end
- glyphs
- n
) * sizeof (*end
));
3647 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3648 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3649 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3651 /* Compute new line width. */
3652 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3653 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3654 glyph_row
->pixel_width
= glyph_row
->x
;
3657 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3661 /* Increment buffer positions for glyphs following the newly
3663 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3664 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3665 glyph
->charpos
+= delta
;
3667 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3669 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3670 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3673 /* Adjust positions in lines following the one we are in. */
3674 increment_matrix_positions (w
->current_matrix
,
3676 w
->current_matrix
->nrows
,
3677 delta
, delta_bytes
);
3679 glyph_row
->contains_overlapping_glyphs_p
3680 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3682 glyph_row
->displays_text_p
= 1;
3683 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3684 XFASTINT (w
->window_end_vpos
)));
3686 if (!NILP (Vshow_trailing_whitespace
))
3687 highlight_trailing_whitespace (it
.f
, glyph_row
);
3689 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3690 In the middle, we have to insert glyphs. Note that this is now
3691 implemented for X frames. The implementation uses updated_window
3693 updated_row
= glyph_row
;
3694 updated_area
= TEXT_AREA
;
3698 FRAME_RIF (f
)->update_window_begin_hook (w
);
3700 if (glyphs
== end
- n
3701 /* In front of a space added by append_space. */
3702 || (glyphs
== end
- n
- 1
3703 && (end
- n
)->charpos
<= 0))
3704 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3706 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3710 if (glyphs
== end
- n
)
3711 write_glyphs (f
, glyphs
, n
);
3713 insert_glyphs (f
, glyphs
, n
);
3716 w
->cursor
.hpos
+= n
;
3717 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3718 xassert (w
->cursor
.hpos
>= 0
3719 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3721 /* How to set the cursor differs depending on whether we are
3722 using a frame matrix or a window matrix. Note that when
3723 a frame matrix is used, cursor_to expects frame coordinates,
3724 and the X and Y parameters are not used. */
3725 if (window_redisplay_p
)
3726 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3727 w
->cursor
.y
, w
->cursor
.x
);
3731 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3732 + (INTEGERP (w
->left_margin_cols
)
3733 ? XFASTINT (w
->left_margin_cols
)
3735 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3736 cursor_to (f
, y
, x
);
3739 #ifdef HAVE_WINDOW_SYSTEM
3740 update_window_fringes (w
, 0);
3744 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3747 if (FRAME_TERMCAP_P (f
))
3748 fflush (FRAME_TTY (f
)->output
);
3750 TRACE ((stderr
, "direct output for insert\n"));
3751 mark_window_display_accurate (it
.window
, 1);
3752 redisplay_performed_directly_p
= 1;
3757 /* Perform a direct display update for moving PT by N positions
3758 left or right. N < 0 means a movement backwards. This function
3759 is currently only called for N == 1 or N == -1. */
3762 direct_output_forward_char (n
)
3765 struct frame
*f
= SELECTED_FRAME ();
3766 struct window
*w
= XWINDOW (selected_window
);
3767 struct glyph_row
*row
;
3769 /* Give up if point moved out of or into a composition. */
3770 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3771 current_buffer
, PT
))
3774 /* Give up if face attributes have been changed. */
3775 if (face_change_count
)
3778 /* Give up if current matrix is not up to date or we are
3779 displaying a message. */
3780 if (!display_completed
|| cursor_in_echo_area
)
3783 /* Give up if we need to reorder bidirectional text. */
3784 if (!NILP (XBUFFER (w
->buffer
)->bidi_display_reordering
))
3787 /* Give up if the buffer's direction is reversed. */
3788 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3791 /* Can't use direct output if highlighting a region. */
3792 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3795 /* Can't use direct output if highlighting trailing whitespace. */
3796 if (!NILP (Vshow_trailing_whitespace
))
3799 /* Give up if we are showing a message or just cleared the message
3800 because we might need to resize the echo area window. */
3801 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3804 /* Give up if currently displaying a message instead of the
3805 minibuffer contents. */
3806 if (XWINDOW (minibuf_window
) == w
3807 && EQ (minibuf_window
, echo_area_window
))
3810 /* Give up if we don't know where the cursor is. */
3811 if (w
->cursor
.vpos
< 0)
3814 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3816 /* Give up if PT is outside of the last known cursor row. */
3817 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3818 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3821 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3823 w
->last_cursor
= w
->cursor
;
3824 XSETFASTINT (w
->last_point
, PT
);
3826 xassert (w
->cursor
.hpos
>= 0
3827 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3829 if (FRAME_WINDOW_P (f
))
3830 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3831 w
->cursor
.y
, w
->cursor
.x
);
3835 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3836 + (INTEGERP (w
->left_margin_cols
)
3837 ? XFASTINT (w
->left_margin_cols
)
3839 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3840 cursor_to (f
, y
, x
);
3843 if (FRAME_TERMCAP_P (f
))
3844 fflush (FRAME_TTY (f
)->output
);
3845 redisplay_performed_directly_p
= 1;
3851 /***********************************************************************
3853 ***********************************************************************/
3855 /* Update frame F based on the data in desired matrices.
3857 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3858 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3861 Value is non-zero if redisplay was stopped due to pending input. */
3864 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3867 int inhibit_hairy_id_p
;
3869 /* 1 means display has been paused because of pending input. */
3871 struct window
*root_window
= XWINDOW (f
->root_window
);
3873 if (redisplay_dont_pause
)
3875 #if PERIODIC_PREEMPTION_CHECKING
3876 else if (NILP (Vredisplay_preemption_period
))
3878 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3881 double p
= XFLOATINT (Vredisplay_preemption_period
);
3884 if (detect_input_pending_ignore_squeezables ())
3891 usec
= (p
- sec
) * 1000000;
3893 EMACS_GET_TIME (tm
);
3894 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3895 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3899 if (FRAME_WINDOW_P (f
))
3901 /* We are working on window matrix basis. All windows whose
3902 flag must_be_updated_p is set have to be updated. */
3904 /* Record that we are not working on frame matrices. */
3905 set_frame_matrix_frame (NULL
);
3907 /* Update all windows in the window tree of F, maybe stopping
3908 when pending input is detected. */
3911 /* Update the menu bar on X frames that don't have toolkit
3913 if (WINDOWP (f
->menu_bar_window
))
3914 update_window (XWINDOW (f
->menu_bar_window
), 1);
3916 /* Update the tool-bar window, if present. */
3917 if (WINDOWP (f
->tool_bar_window
))
3919 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3921 /* Update tool-bar window. */
3922 if (w
->must_be_updated_p
)
3926 update_window (w
, 1);
3927 w
->must_be_updated_p
= 0;
3929 /* Swap tool-bar strings. We swap because we want to
3931 tem
= f
->current_tool_bar_string
;
3932 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3933 f
->desired_tool_bar_string
= tem
;
3938 /* Update windows. */
3939 paused_p
= update_window_tree (root_window
, force_p
);
3942 /* This flush is a performance bottleneck under X,
3943 and it doesn't seem to be necessary anyway (in general).
3944 It is necessary when resizing the window with the mouse, or
3945 at least the fringes are not redrawn in a timely manner. ++kfs */
3946 if (f
->force_flush_display_p
)
3948 FRAME_RIF (f
)->flush_display (f
);
3949 f
->force_flush_display_p
= 0;
3954 /* We are working on frame matrix basis. Set the frame on whose
3955 frame matrix we operate. */
3956 set_frame_matrix_frame (f
);
3958 /* Build F's desired matrix from window matrices. */
3959 build_frame_matrix (f
);
3961 /* Update the display */
3963 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3966 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3968 if (FRAME_TTY (f
)->termscript
)
3969 fflush (FRAME_TTY (f
)->termscript
);
3970 if (FRAME_TERMCAP_P (f
))
3971 fflush (FRAME_TTY (f
)->output
);
3974 /* Check window matrices for lost pointers. */
3976 check_window_matrix_pointers (root_window
);
3977 add_frame_display_history (f
, paused_p
);
3982 /* Reset flags indicating that a window should be updated. */
3983 set_window_update_flags (root_window
, 0);
3985 display_completed
= !paused_p
;
3991 /************************************************************************
3992 Window-based updates
3993 ************************************************************************/
3995 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3996 don't stop updating when input is pending. */
3999 update_window_tree (w
, force_p
)
4005 while (w
&& !paused_p
)
4007 if (!NILP (w
->hchild
))
4008 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
4009 else if (!NILP (w
->vchild
))
4010 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
4011 else if (w
->must_be_updated_p
)
4012 paused_p
|= update_window (w
, force_p
);
4014 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4021 /* Update window W if its flag must_be_updated_p is non-zero. If
4022 FORCE_P is non-zero, don't stop updating if input is pending. */
4025 update_single_window (w
, force_p
)
4029 if (w
->must_be_updated_p
)
4031 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4033 /* Record that this is not a frame-based redisplay. */
4034 set_frame_matrix_frame (NULL
);
4036 if (redisplay_dont_pause
)
4038 #if PERIODIC_PREEMPTION_CHECKING
4039 else if (NILP (Vredisplay_preemption_period
))
4041 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4044 double p
= XFLOATINT (Vredisplay_preemption_period
);
4048 usec
= (p
- sec
) * 1000000;
4050 EMACS_GET_TIME (tm
);
4051 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4052 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4058 update_window (w
, force_p
);
4061 /* Reset flag in W. */
4062 w
->must_be_updated_p
= 0;
4066 #ifdef HAVE_WINDOW_SYSTEM
4068 /* Redraw lines from the current matrix of window W that are
4069 overlapped by other rows. YB is bottom-most y-position in W. */
4072 redraw_overlapped_rows (w
, yb
)
4077 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4079 /* If rows overlapping others have been changed, the rows being
4080 overlapped have to be redrawn. This won't draw lines that have
4081 already been drawn in update_window_line because overlapped_p in
4082 desired rows is 0, so after row assignment overlapped_p in
4083 current rows is 0. */
4084 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4086 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4088 if (!row
->enabled_p
)
4090 else if (row
->mode_line_p
)
4093 if (row
->overlapped_p
)
4095 enum glyph_row_area area
;
4097 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4100 updated_area
= area
;
4101 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
4102 area
== TEXT_AREA
? row
->x
: 0);
4103 if (row
->used
[area
])
4104 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4106 FRAME_RIF (f
)->clear_end_of_line (-1);
4109 row
->overlapped_p
= 0;
4112 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4118 /* Redraw lines from the current matrix of window W that overlap
4119 others. YB is bottom-most y-position in W. */
4122 redraw_overlapping_rows (w
, yb
)
4127 struct glyph_row
*row
;
4128 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4130 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4132 row
= w
->current_matrix
->rows
+ i
;
4134 if (!row
->enabled_p
)
4136 else if (row
->mode_line_p
)
4139 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4141 if (row
->overlapping_p
)
4145 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
4146 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4147 overlaps
|= OVERLAPS_PRED
;
4148 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
4149 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4150 overlaps
|= OVERLAPS_SUCC
;
4154 if (row
->used
[LEFT_MARGIN_AREA
])
4155 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4157 if (row
->used
[TEXT_AREA
])
4158 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4160 if (row
->used
[RIGHT_MARGIN_AREA
])
4161 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4163 /* Record in neighbour rows that ROW overwrites part of
4165 if (overlaps
& OVERLAPS_PRED
)
4166 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4167 if (overlaps
& OVERLAPS_SUCC
)
4168 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4177 #endif /* HAVE_WINDOW_SYSTEM */
4182 /* Check that no row in the current matrix of window W is enabled
4183 which is below what's displayed in the window. */
4186 check_current_matrix_flags (w
)
4189 int last_seen_p
= 0;
4190 int i
, yb
= window_text_bottom_y (w
);
4192 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4194 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4195 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4197 else if (last_seen_p
&& row
->enabled_p
)
4202 #endif /* GLYPH_DEBUG */
4205 /* Update display of window W. FORCE_P non-zero means that we should
4206 not stop when detecting pending input. */
4209 update_window (w
, force_p
)
4213 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4215 #if !PERIODIC_PREEMPTION_CHECKING
4216 int preempt_count
= baud_rate
/ 2400 + 1;
4218 extern int input_pending
;
4219 extern Lisp_Object do_mouse_tracking
;
4220 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4222 /* Check that W's frame doesn't have glyph matrices. */
4223 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4226 /* Check pending input the first time so that we can quickly return. */
4227 #if !PERIODIC_PREEMPTION_CHECKING
4229 detect_input_pending_ignore_squeezables ();
4232 /* If forced to complete the update, or if no input is pending, do
4234 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4236 struct glyph_row
*row
, *end
;
4237 struct glyph_row
*mode_line_row
;
4238 struct glyph_row
*header_line_row
;
4239 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4241 rif
->update_window_begin_hook (w
);
4242 yb
= window_text_bottom_y (w
);
4244 /* If window has a header line, update it before everything else.
4245 Adjust y-positions of other rows by the header line height. */
4246 row
= desired_matrix
->rows
;
4247 end
= row
+ desired_matrix
->nrows
- 1;
4249 if (row
->mode_line_p
)
4251 header_line_row
= row
;
4255 header_line_row
= NULL
;
4257 /* Update the mode line, if necessary. */
4258 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4259 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4261 mode_line_row
->y
= yb
;
4262 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4264 &mouse_face_overwritten_p
);
4267 /* Find first enabled row. Optimizations in redisplay_internal
4268 may lead to an update with only one row enabled. There may
4269 be also completely empty matrices. */
4270 while (row
< end
&& !row
->enabled_p
)
4273 /* Try reusing part of the display by copying. */
4274 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4276 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4279 /* All rows were found to be equal. */
4285 /* We've scrolled the display. */
4291 /* Update the rest of the lines. */
4292 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4295 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4298 /* We'll have to play a little bit with when to
4299 detect_input_pending. If it's done too often,
4300 scrolling large windows with repeated scroll-up
4301 commands will too quickly pause redisplay. */
4302 #if PERIODIC_PREEMPTION_CHECKING
4306 EMACS_GET_TIME (tm
);
4307 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4308 if (EMACS_TIME_NEG_P (dif
))
4310 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4311 if (detect_input_pending_ignore_squeezables ())
4316 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4317 detect_input_pending_ignore_squeezables ();
4319 changed_p
|= update_window_line (w
, vpos
,
4320 &mouse_face_overwritten_p
);
4322 /* Mark all rows below the last visible one in the current
4323 matrix as invalid. This is necessary because of
4324 variable line heights. Consider the case of three
4325 successive redisplays, where the first displays 5
4326 lines, the second 3 lines, and the third 5 lines again.
4327 If the second redisplay wouldn't mark rows in the
4328 current matrix invalid, the third redisplay might be
4329 tempted to optimize redisplay based on lines displayed
4330 in the first redisplay. */
4331 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4332 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4333 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4336 /* Was display preempted? */
4337 paused_p
= row
< end
;
4341 /* Update the header line after scrolling because a new header
4342 line would otherwise overwrite lines at the top of the window
4343 that can be scrolled. */
4344 if (header_line_row
&& header_line_row
->enabled_p
)
4346 header_line_row
->y
= 0;
4347 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4350 /* Fix the appearance of overlapping/overlapped rows. */
4351 if (!paused_p
&& !w
->pseudo_window_p
)
4353 #ifdef HAVE_WINDOW_SYSTEM
4354 if (changed_p
&& rif
->fix_overlapping_area
)
4356 redraw_overlapped_rows (w
, yb
);
4357 redraw_overlapping_rows (w
, yb
);
4361 /* Make cursor visible at cursor position of W. */
4362 set_window_cursor_after_update (w
);
4364 #if 0 /* Check that current matrix invariants are satisfied. This is
4365 for debugging only. See the comment of check_matrix_invariants. */
4366 IF_DEBUG (check_matrix_invariants (w
));
4371 /* Remember the redisplay method used to display the matrix. */
4372 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4375 #ifdef HAVE_WINDOW_SYSTEM
4376 update_window_fringes (w
, 0);
4379 /* End the update of window W. Don't set the cursor if we
4380 paused updating the display because in this case,
4381 set_window_cursor_after_update hasn't been called, and
4382 output_cursor doesn't contain the cursor location. */
4383 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4389 /* check_current_matrix_flags (w); */
4390 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4393 clear_glyph_matrix (desired_matrix
);
4399 /* Update the display of area AREA in window W, row number VPOS.
4400 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4403 update_marginal_area (w
, area
, vpos
)
4407 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4408 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4410 /* Let functions in xterm.c know what area subsequent X positions
4411 will be relative to. */
4412 updated_area
= area
;
4414 /* Set cursor to start of glyphs, write them, and clear to the end
4415 of the area. I don't think that something more sophisticated is
4416 necessary here, since marginal areas will not be the default. */
4417 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4418 if (desired_row
->used
[area
])
4419 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4420 rif
->clear_end_of_line (-1);
4424 /* Update the display of the text area of row VPOS in window W.
4425 Value is non-zero if display has changed. */
4428 update_text_area (w
, vpos
)
4432 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4433 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4434 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4437 /* Let functions in xterm.c know what area subsequent X positions
4438 will be relative to. */
4439 updated_area
= TEXT_AREA
;
4441 /* If rows are at different X or Y, or rows have different height,
4442 or the current row is marked invalid, write the entire line. */
4443 if (!current_row
->enabled_p
4444 || desired_row
->y
!= current_row
->y
4445 || desired_row
->ascent
!= current_row
->ascent
4446 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4447 || desired_row
->phys_height
!= current_row
->phys_height
4448 || desired_row
->visible_height
!= current_row
->visible_height
4449 || current_row
->overlapped_p
4450 /* This next line is necessary for correctly redrawing
4451 mouse-face areas after scrolling and other operations.
4452 However, it causes excessive flickering when mouse is moved
4453 across the mode line. Luckily, turning it off for the mode
4454 line doesn't seem to hurt anything. -- cyd.
4455 But it is still needed for the header line. -- kfs. */
4456 || (current_row
->mouse_face_p
4457 && !(current_row
->mode_line_p
&& vpos
> 0))
4458 || current_row
->x
!= desired_row
->x
)
4460 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4462 if (desired_row
->used
[TEXT_AREA
])
4463 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4464 desired_row
->used
[TEXT_AREA
]);
4466 /* Clear to end of window. */
4467 rif
->clear_end_of_line (-1);
4470 /* This erases the cursor. We do this here because
4471 notice_overwritten_cursor cannot easily check this, which
4472 might indicate that the whole functionality of
4473 notice_overwritten_cursor would better be implemented here.
4474 On the other hand, we need notice_overwritten_cursor as long
4475 as mouse highlighting is done asynchronously outside of
4477 if (vpos
== w
->phys_cursor
.vpos
)
4478 w
->phys_cursor_on_p
= 0;
4483 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4484 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4485 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4486 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4487 int abort_skipping
= 0;
4489 /* If the desired row extends its face to the text area end, and
4490 unless the current row also does so at the same position,
4491 make sure we write at least one glyph, so that the face
4492 extension actually takes place. */
4493 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4494 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4495 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4496 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4499 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4503 /* Loop over glyphs that current and desired row may have
4507 int can_skip_p
= !abort_skipping
;
4509 /* Skip over glyphs that both rows have in common. These
4510 don't have to be written. We can't skip if the last
4511 current glyph overlaps the glyph to its right. For
4512 example, consider a current row of `if ' with the `f' in
4513 Courier bold so that it overlaps the ` ' to its right.
4514 If the desired row is ` ', we would skip over the space
4515 after the `if' and there would remain a pixel from the
4516 `f' on the screen. */
4517 if (overlapping_glyphs_p
&& i
> 0)
4519 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4522 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4524 can_skip_p
= (right
== 0 && !abort_skipping
);
4532 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4534 x
+= desired_glyph
->pixel_width
;
4535 ++desired_glyph
, ++current_glyph
, ++i
;
4538 /* Consider the case that the current row contains "xxx
4539 ppp ggg" in italic Courier font, and the desired row
4540 is "xxx ggg". The character `p' has lbearing, `g'
4541 has not. The loop above will stop in front of the
4542 first `p' in the current row. If we would start
4543 writing glyphs there, we wouldn't erase the lbearing
4544 of the `p'. The rest of the lbearing problem is then
4545 taken care of by draw_glyphs. */
4546 if (overlapping_glyphs_p
4548 && i
< current_row
->used
[TEXT_AREA
]
4549 && (current_row
->used
[TEXT_AREA
]
4550 != desired_row
->used
[TEXT_AREA
]))
4554 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4556 while (left
> 0 && i
> 0)
4558 --i
, --desired_glyph
, --current_glyph
;
4559 x
-= desired_glyph
->pixel_width
;
4560 left
-= desired_glyph
->pixel_width
;
4563 /* Abort the skipping algorithm if we end up before
4564 our starting point, to avoid looping (bug#1070).
4565 This can happen when the lbearing is larger than
4567 abort_skipping
= (i
< start_hpos
);
4571 /* Try to avoid writing the entire rest of the desired row
4572 by looking for a resync point. This mainly prevents
4573 mode line flickering in the case the mode line is in
4574 fixed-pitch font, which it usually will be. */
4575 if (i
< desired_row
->used
[TEXT_AREA
])
4577 int start_x
= x
, start_hpos
= i
;
4578 struct glyph
*start
= desired_glyph
;
4580 int skip_first_p
= !can_skip_p
;
4582 /* Find the next glyph that's equal again. */
4585 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4588 x
+= desired_glyph
->pixel_width
;
4589 current_x
+= current_glyph
->pixel_width
;
4590 ++desired_glyph
, ++current_glyph
, ++i
;
4594 if (i
== start_hpos
|| x
!= current_x
)
4598 desired_glyph
= start
;
4602 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4603 rif
->write_glyphs (start
, i
- start_hpos
);
4608 /* Write the rest. */
4609 if (i
< desired_row
->used
[TEXT_AREA
])
4611 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4612 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4616 /* Maybe clear to end of line. */
4617 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4619 /* If new row extends to the end of the text area, nothing
4620 has to be cleared, if and only if we did a write_glyphs
4621 above. This is made sure by setting desired_stop_pos
4622 appropriately above. */
4623 xassert (i
< desired_row
->used
[TEXT_AREA
]
4624 || ((desired_row
->used
[TEXT_AREA
]
4625 == current_row
->used
[TEXT_AREA
])
4626 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4628 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4630 /* If old row extends to the end of the text area, clear. */
4631 if (i
>= desired_row
->used
[TEXT_AREA
])
4632 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4633 desired_row
->pixel_width
);
4634 rif
->clear_end_of_line (-1);
4637 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4639 /* Otherwise clear to the end of the old row. Everything
4640 after that position should be clear already. */
4643 if (i
>= desired_row
->used
[TEXT_AREA
])
4644 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4645 desired_row
->pixel_width
);
4647 /* If cursor is displayed at the end of the line, make sure
4648 it's cleared. Nowadays we don't have a phys_cursor_glyph
4649 with which to erase the cursor (because this method
4650 doesn't work with lbearing/rbearing), so we must do it
4652 if (vpos
== w
->phys_cursor
.vpos
4653 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4655 w
->phys_cursor_on_p
= 0;
4659 x
= current_row
->pixel_width
;
4660 rif
->clear_end_of_line (x
);
4669 /* Update row VPOS in window W. Value is non-zero if display has been
4673 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4675 int vpos
, *mouse_face_overwritten_p
;
4677 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4678 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4679 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4682 /* Set the row being updated. This is important to let xterm.c
4683 know what line height values are in effect. */
4684 updated_row
= desired_row
;
4686 /* A row can be completely invisible in case a desired matrix was
4687 built with a vscroll and then make_cursor_line_fully_visible shifts
4688 the matrix. Make sure to make such rows current anyway, since
4689 we need the correct y-position, for example, in the current matrix. */
4690 if (desired_row
->mode_line_p
4691 || desired_row
->visible_height
> 0)
4693 xassert (desired_row
->enabled_p
);
4695 /* Update display of the left margin area, if there is one. */
4696 if (!desired_row
->full_width_p
4697 && !NILP (w
->left_margin_cols
))
4700 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4703 /* Update the display of the text area. */
4704 if (update_text_area (w
, vpos
))
4707 if (current_row
->mouse_face_p
)
4708 *mouse_face_overwritten_p
= 1;
4711 /* Update display of the right margin area, if there is one. */
4712 if (!desired_row
->full_width_p
4713 && !NILP (w
->right_margin_cols
))
4716 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4719 /* Draw truncation marks etc. */
4720 if (!current_row
->enabled_p
4721 || desired_row
->y
!= current_row
->y
4722 || desired_row
->visible_height
!= current_row
->visible_height
4723 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4724 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4725 || current_row
->redraw_fringe_bitmaps_p
4726 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4727 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4728 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4729 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4730 rif
->after_update_window_line_hook (desired_row
);
4733 /* Update current_row from desired_row. */
4734 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4740 /* Set the cursor after an update of window W. This function may only
4741 be called from update_window. */
4744 set_window_cursor_after_update (w
)
4747 struct frame
*f
= XFRAME (w
->frame
);
4748 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4749 int cx
, cy
, vpos
, hpos
;
4751 /* Not intended for frame matrix updates. */
4752 xassert (FRAME_WINDOW_P (f
));
4754 if (cursor_in_echo_area
4755 && !NILP (echo_area_buffer
[0])
4756 /* If we are showing a message instead of the mini-buffer,
4757 show the cursor for the message instead. */
4758 && XWINDOW (minibuf_window
) == w
4759 && EQ (minibuf_window
, echo_area_window
)
4760 /* These cases apply only to the frame that contains
4761 the active mini-buffer window. */
4762 && FRAME_HAS_MINIBUF_P (f
)
4763 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4765 cx
= cy
= vpos
= hpos
= 0;
4767 if (cursor_in_echo_area
>= 0)
4769 /* If the mini-buffer is several lines high, find the last
4770 line that has any text on it. Note: either all lines
4771 are enabled or none. Otherwise we wouldn't be able to
4773 struct glyph_row
*row
, *last_row
;
4774 struct glyph
*glyph
;
4775 int yb
= window_text_bottom_y (w
);
4778 row
= w
->current_matrix
->rows
;
4779 while (row
->enabled_p
4780 && (last_row
== NULL
4781 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4783 if (row
->used
[TEXT_AREA
]
4784 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4791 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4792 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4794 while (last
> start
&& last
->charpos
< 0)
4797 for (glyph
= start
; glyph
< last
; ++glyph
)
4799 cx
+= glyph
->pixel_width
;
4804 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4812 hpos
= w
->cursor
.hpos
;
4813 vpos
= w
->cursor
.vpos
;
4816 /* Window cursor can be out of sync for horizontally split windows. */
4817 hpos
= max (0, hpos
);
4818 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4819 vpos
= max (0, vpos
);
4820 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4821 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4825 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4826 tree rooted at W. */
4829 set_window_update_flags (w
, on_p
)
4835 if (!NILP (w
->hchild
))
4836 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4837 else if (!NILP (w
->vchild
))
4838 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4840 w
->must_be_updated_p
= on_p
;
4842 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4848 /***********************************************************************
4849 Window-Based Scrolling
4850 ***********************************************************************/
4852 /* Structure describing rows in scrolling_window. */
4856 /* Number of occurrences of this row in desired and current matrix. */
4857 int old_uses
, new_uses
;
4859 /* Vpos of row in new matrix. */
4860 int new_line_number
;
4862 /* Bucket index of this row_entry in the hash table row_table. */
4865 /* The row described by this entry. */
4866 struct glyph_row
*row
;
4868 /* Hash collision chain. */
4869 struct row_entry
*next
;
4872 /* A pool to allocate row_entry structures from, and the size of the
4873 pool. The pool is reallocated in scrolling_window when we find
4874 that we need a larger one. */
4876 static struct row_entry
*row_entry_pool
;
4877 static int row_entry_pool_size
;
4879 /* Index of next free entry in row_entry_pool. */
4881 static int row_entry_idx
;
4883 /* The hash table used during scrolling, and the table's size. This
4884 table is used to quickly identify equal rows in the desired and
4887 static struct row_entry
**row_table
;
4888 static int row_table_size
;
4890 /* Vectors of pointers to row_entry structures belonging to the
4891 current and desired matrix, and the size of the vectors. */
4893 static struct row_entry
**old_lines
, **new_lines
;
4894 static int old_lines_size
, new_lines_size
;
4896 /* A pool to allocate run structures from, and its size. */
4898 static struct run
*run_pool
;
4899 static int runs_size
;
4901 /* A vector of runs of lines found during scrolling. */
4903 static struct run
**runs
;
4905 /* Add glyph row ROW to the scrolling hash table during the scrolling
4908 static INLINE
struct row_entry
*
4909 add_row_entry (w
, row
)
4911 struct glyph_row
*row
;
4913 struct row_entry
*entry
;
4914 int i
= row
->hash
% row_table_size
;
4916 entry
= row_table
[i
];
4917 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4918 entry
= entry
->next
;
4922 entry
= row_entry_pool
+ row_entry_idx
++;
4924 entry
->old_uses
= entry
->new_uses
= 0;
4925 entry
->new_line_number
= 0;
4927 entry
->next
= row_table
[i
];
4928 row_table
[i
] = entry
;
4935 /* Try to reuse part of the current display of W by scrolling lines.
4936 HEADER_LINE_P non-zero means W has a header line.
4938 The algorithm is taken from Communications of the ACM, Apr78 "A
4939 Technique for Isolating Differences Between Files." It should take
4942 A short outline of the steps of the algorithm
4944 1. Skip lines equal at the start and end of both matrices.
4946 2. Enter rows in the current and desired matrix into a symbol
4947 table, counting how often they appear in both matrices.
4949 3. Rows that appear exactly once in both matrices serve as anchors,
4950 i.e. we assume that such lines are likely to have been moved.
4952 4. Starting from anchor lines, extend regions to be scrolled both
4953 forward and backward.
4957 -1 if all rows were found to be equal.
4958 0 to indicate that we did not scroll the display, or
4959 1 if we did scroll. */
4962 scrolling_window (w
, header_line_p
)
4966 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4967 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4968 int yb
= window_text_bottom_y (w
);
4969 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4970 int nruns
, nbytes
, n
, run_idx
;
4971 struct row_entry
*entry
;
4972 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4974 /* Skip over rows equal at the start. */
4975 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4977 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4978 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4982 && !d
->redraw_fringe_bitmaps_p
4984 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4985 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4986 && row_equal_p (w
, c
, d
, 1))
4995 /* Give up if some rows in the desired matrix are not enabled. */
4996 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4999 first_old
= first_new
= i
;
5001 /* Set last_new to the index + 1 of the last enabled row in the
5004 while (i
< desired_matrix
->nrows
- 1
5005 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
5006 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
5009 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5014 /* Set last_old to the index + 1 of the last enabled row in the
5015 current matrix. We don't look at the enabled flag here because
5016 we plan to reuse part of the display even if other parts are
5019 while (i
< current_matrix
->nrows
- 1)
5021 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
5030 /* Skip over rows equal at the bottom. */
5033 while (i
- 1 > first_new
5034 && j
- 1 > first_old
5035 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
5036 && (MATRIX_ROW (current_matrix
, i
- 1)->y
5037 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
5038 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
5040 MATRIX_ROW (desired_matrix
, i
- 1),
5041 MATRIX_ROW (current_matrix
, j
- 1), 1))
5046 /* Nothing to do if all rows are equal. */
5047 if (last_new
== first_new
)
5050 /* Reallocate vectors, tables etc. if necessary. */
5052 if (current_matrix
->nrows
> old_lines_size
)
5054 old_lines_size
= current_matrix
->nrows
;
5055 nbytes
= old_lines_size
* sizeof *old_lines
;
5056 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5059 if (desired_matrix
->nrows
> new_lines_size
)
5061 new_lines_size
= desired_matrix
->nrows
;
5062 nbytes
= new_lines_size
* sizeof *new_lines
;
5063 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5066 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5067 if (3 * n
> row_table_size
)
5069 row_table_size
= next_almost_prime (3 * n
);
5070 nbytes
= row_table_size
* sizeof *row_table
;
5071 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5072 bzero (row_table
, nbytes
);
5075 if (n
> row_entry_pool_size
)
5077 row_entry_pool_size
= n
;
5078 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5079 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5082 if (desired_matrix
->nrows
> runs_size
)
5084 runs_size
= desired_matrix
->nrows
;
5085 nbytes
= runs_size
* sizeof *runs
;
5086 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5087 nbytes
= runs_size
* sizeof *run_pool
;
5088 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5091 nruns
= run_idx
= 0;
5094 /* Add rows from the current and desired matrix to the hash table
5095 row_hash_table to be able to find equal ones quickly. */
5097 for (i
= first_old
; i
< last_old
; ++i
)
5099 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5101 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5102 old_lines
[i
] = entry
;
5106 old_lines
[i
] = NULL
;
5109 for (i
= first_new
; i
< last_new
; ++i
)
5111 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5112 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5114 entry
->new_line_number
= i
;
5115 new_lines
[i
] = entry
;
5118 /* Identify moves based on lines that are unique and equal
5119 in both matrices. */
5120 for (i
= first_old
; i
< last_old
;)
5122 && old_lines
[i
]->old_uses
== 1
5123 && old_lines
[i
]->new_uses
== 1)
5126 int new_line
= old_lines
[i
]->new_line_number
;
5127 struct run
*run
= run_pool
+ run_idx
++;
5130 run
->current_vpos
= i
;
5131 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5132 run
->desired_vpos
= new_line
;
5133 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5135 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5137 /* Extend backward. */
5140 while (j
> first_old
5142 && old_lines
[j
] == new_lines
[k
])
5144 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5145 --run
->current_vpos
;
5146 --run
->desired_vpos
;
5149 run
->desired_y
-= h
;
5150 run
->current_y
-= h
;
5154 /* Extend forward. */
5159 && old_lines
[j
] == new_lines
[k
])
5161 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5167 /* Insert run into list of all runs. Order runs by copied
5168 pixel lines. Note that we record runs that don't have to
5169 be copied because they are already in place. This is done
5170 because we can avoid calling update_window_line in this
5172 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5174 for (k
= nruns
; k
> j
; --k
)
5175 runs
[k
] = runs
[k
- 1];
5184 /* Do the moves. Do it in a way that we don't overwrite something
5185 we want to copy later on. This is not solvable in general
5186 because there is only one display and we don't have a way to
5187 exchange areas on this display. Example:
5189 +-----------+ +-----------+
5191 +-----------+ --> +-----------+
5193 +-----------+ +-----------+
5195 Instead, prefer bigger moves, and invalidate moves that would
5196 copy from where we copied to. */
5198 for (i
= 0; i
< nruns
; ++i
)
5199 if (runs
[i
]->nrows
> 0)
5201 struct run
*r
= runs
[i
];
5203 /* Copy on the display. */
5204 if (r
->current_y
!= r
->desired_y
)
5206 rif
->scroll_run_hook (w
, r
);
5208 /* Invalidate runs that copy from where we copied to. */
5209 for (j
= i
+ 1; j
< nruns
; ++j
)
5211 struct run
*p
= runs
[j
];
5213 if ((p
->current_y
>= r
->desired_y
5214 && p
->current_y
< r
->desired_y
+ r
->height
)
5215 || (p
->current_y
+ p
->height
>= r
->desired_y
5216 && (p
->current_y
+ p
->height
5217 < r
->desired_y
+ r
->height
)))
5222 /* Assign matrix rows. */
5223 for (j
= 0; j
< r
->nrows
; ++j
)
5225 struct glyph_row
*from
, *to
;
5226 int to_overlapped_p
;
5228 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5229 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5230 to_overlapped_p
= to
->overlapped_p
;
5231 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5232 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5233 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5234 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5235 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5236 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5237 from
->redraw_fringe_bitmaps_p
= 1;
5238 assign_row (to
, from
);
5239 to
->enabled_p
= 1, from
->enabled_p
= 0;
5240 to
->overlapped_p
= to_overlapped_p
;
5244 /* Clear the hash table, for the next time. */
5245 for (i
= 0; i
< row_entry_idx
; ++i
)
5246 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5248 /* Value is > 0 to indicate that we scrolled the display. */
5254 /************************************************************************
5256 ************************************************************************/
5258 /* Update the desired frame matrix of frame F.
5260 FORCE_P non-zero means that the update should not be stopped by
5261 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5262 should not be tried.
5264 Value is non-zero if update was stopped due to pending input. */
5267 update_frame_1 (f
, force_p
, inhibit_id_p
)
5272 /* Frame matrices to work on. */
5273 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5274 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5277 int preempt_count
= baud_rate
/ 2400 + 1;
5278 extern int input_pending
;
5280 xassert (current_matrix
&& desired_matrix
);
5282 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5283 calculate_costs (f
);
5285 if (preempt_count
<= 0)
5288 #if !PERIODIC_PREEMPTION_CHECKING
5289 if (!force_p
&& detect_input_pending_ignore_squeezables ())
5296 /* If we cannot insert/delete lines, it's no use trying it. */
5297 if (!FRAME_LINE_INS_DEL_OK (f
))
5300 /* See if any of the desired lines are enabled; don't compute for
5301 i/d line if just want cursor motion. */
5302 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5303 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5306 /* Try doing i/d line, if not yet inhibited. */
5307 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5308 force_p
|= scrolling (f
);
5310 /* Update the individual lines as needed. Do bottom line first. */
5311 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5312 update_frame_line (f
, desired_matrix
->nrows
- 1);
5314 /* Now update the rest of the lines. */
5315 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5317 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5319 if (FRAME_TERMCAP_P (f
))
5321 /* Flush out every so many lines.
5322 Also flush out if likely to have more than 1k buffered
5323 otherwise. I'm told that some telnet connections get
5324 really screwed by more than 1k output at once. */
5325 FILE *display_output
= FRAME_TTY (f
)->output
;
5328 int outq
= PENDING_OUTPUT_COUNT (display_output
);
5330 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5332 fflush (display_output
);
5333 if (preempt_count
== 1)
5335 #ifdef EMACS_OUTQSIZE
5336 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5337 /* Probably not a tty. Ignore the error and reset
5339 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5342 if (baud_rate
<= outq
&& baud_rate
> 0)
5343 sleep (outq
/ baud_rate
);
5349 #if PERIODIC_PREEMPTION_CHECKING
5353 EMACS_GET_TIME (tm
);
5354 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5355 if (EMACS_TIME_NEG_P (dif
))
5357 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5358 if (detect_input_pending_ignore_squeezables ())
5363 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5364 detect_input_pending_ignore_squeezables ();
5367 update_frame_line (f
, i
);
5371 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5373 /* Now just clean up termcap drivers and set cursor, etc. */
5376 if ((cursor_in_echo_area
5377 /* If we are showing a message instead of the mini-buffer,
5378 show the cursor for the message instead of for the
5379 (now hidden) mini-buffer contents. */
5380 || (EQ (minibuf_window
, selected_window
)
5381 && EQ (minibuf_window
, echo_area_window
)
5382 && !NILP (echo_area_buffer
[0])))
5383 /* These cases apply only to the frame that contains
5384 the active mini-buffer window. */
5385 && FRAME_HAS_MINIBUF_P (f
)
5386 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5388 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5391 if (cursor_in_echo_area
< 0)
5393 /* Negative value of cursor_in_echo_area means put
5394 cursor at beginning of line. */
5400 /* Positive value of cursor_in_echo_area means put
5401 cursor at the end of the prompt. If the mini-buffer
5402 is several lines high, find the last line that has
5404 row
= FRAME_LINES (f
);
5410 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5412 /* Frame rows are filled up with spaces that
5413 must be ignored here. */
5414 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5416 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5417 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5420 && (last
- 1)->charpos
< 0)
5426 while (row
> top
&& col
== 0);
5428 /* Make sure COL is not out of range. */
5429 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5431 /* If we have another row, advance cursor into it. */
5432 if (row
< FRAME_LINES (f
) - 1)
5434 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5437 /* Otherwise move it back in range. */
5439 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5443 cursor_to (f
, row
, col
);
5447 /* We have only one cursor on terminal frames. Use it to
5448 display the cursor of the selected window. */
5449 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5450 if (w
->cursor
.vpos
>= 0
5451 /* The cursor vpos may be temporarily out of bounds
5452 in the following situation: There is one window,
5453 with the cursor in the lower half of it. The window
5454 is split, and a message causes a redisplay before
5455 a new cursor position has been computed. */
5456 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5458 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5459 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5461 if (INTEGERP (w
->left_margin_cols
))
5462 x
+= XFASTINT (w
->left_margin_cols
);
5464 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5465 cursor_to (f
, y
, x
);
5472 clear_desired_matrices (f
);
5477 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5481 struct frame
*frame
;
5483 int unchanged_at_top
, unchanged_at_bottom
;
5486 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5487 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5488 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5489 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5491 int free_at_end_vpos
= FRAME_LINES (frame
);
5492 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5493 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5495 if (!current_matrix
)
5498 /* Compute hash codes of all the lines. Also calculate number of
5499 changed lines, number of unchanged lines at the beginning, and
5500 number of unchanged lines at the end. */
5502 unchanged_at_top
= 0;
5503 unchanged_at_bottom
= FRAME_LINES (frame
);
5504 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5506 /* Give up on this scrolling if some old lines are not enabled. */
5507 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5509 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5510 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5512 /* This line cannot be redrawn, so don't let scrolling mess it. */
5513 new_hash
[i
] = old_hash
[i
];
5514 #define INFINITY 1000000 /* Taken from scroll.c */
5515 draw_cost
[i
] = INFINITY
;
5519 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5520 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5523 if (old_hash
[i
] != new_hash
[i
])
5526 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5528 else if (i
== unchanged_at_top
)
5530 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5533 /* If changed lines are few, don't allow preemption, don't scroll. */
5534 if ((!FRAME_SCROLL_REGION_OK (frame
)
5535 && changed_lines
< baud_rate
/ 2400)
5536 || unchanged_at_bottom
== FRAME_LINES (frame
))
5539 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5540 - unchanged_at_bottom
);
5542 if (FRAME_SCROLL_REGION_OK (frame
))
5543 free_at_end_vpos
-= unchanged_at_bottom
;
5544 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5545 free_at_end_vpos
= -1;
5547 /* If large window, fast terminal and few lines in common between
5548 current frame and desired frame, don't bother with i/d calc. */
5549 if (!FRAME_SCROLL_REGION_OK (frame
)
5550 && window_size
>= 18 && baud_rate
> 2400
5552 10 * scrolling_max_lines_saved (unchanged_at_top
,
5553 FRAME_LINES (frame
) - unchanged_at_bottom
,
5554 old_hash
, new_hash
, draw_cost
)))
5557 if (window_size
< 2)
5560 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5561 draw_cost
+ unchanged_at_top
- 1,
5562 old_draw_cost
+ unchanged_at_top
- 1,
5563 old_hash
+ unchanged_at_top
- 1,
5564 new_hash
+ unchanged_at_top
- 1,
5565 free_at_end_vpos
- unchanged_at_top
);
5571 /* Count the number of blanks at the start of the vector of glyphs R
5572 which is LEN glyphs long. */
5575 count_blanks (r
, len
)
5581 for (i
= 0; i
< len
; ++i
)
5582 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5589 /* Count the number of glyphs in common at the start of the glyph
5590 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5591 of STR2. Value is the number of equal glyphs equal at the start. */
5594 count_match (str1
, end1
, str2
, end2
)
5595 struct glyph
*str1
, *end1
, *str2
, *end2
;
5597 struct glyph
*p1
= str1
;
5598 struct glyph
*p2
= str2
;
5602 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5609 /* Char insertion/deletion cost vector, from term.c */
5611 extern int *char_ins_del_vector
;
5612 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5615 /* Perform a frame-based update on line VPOS in frame FRAME. */
5618 update_frame_line (f
, vpos
)
5622 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5624 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5625 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5626 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5627 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5628 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5629 int must_write_whole_line_p
;
5630 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5631 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5632 != FACE_TTY_DEFAULT_BG_COLOR
);
5634 if (colored_spaces_p
)
5637 /* Current row not enabled means it has unknown contents. We must
5638 write the whole desired line in that case. */
5639 must_write_whole_line_p
= !current_row
->enabled_p
;
5640 if (must_write_whole_line_p
)
5647 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5648 olen
= current_row
->used
[TEXT_AREA
];
5650 /* Ignore trailing spaces, if we can. */
5651 if (!write_spaces_p
)
5652 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5656 current_row
->enabled_p
= 1;
5657 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5659 /* If desired line is empty, just clear the line. */
5660 if (!desired_row
->enabled_p
)
5666 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5667 nlen
= desired_row
->used
[TEXT_AREA
];
5668 nend
= nbody
+ nlen
;
5670 /* If display line has unknown contents, write the whole line. */
5671 if (must_write_whole_line_p
)
5673 /* Ignore spaces at the end, if we can. */
5674 if (!write_spaces_p
)
5675 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5678 /* Write the contents of the desired line. */
5681 cursor_to (f
, vpos
, 0);
5682 write_glyphs (f
, nbody
, nlen
);
5685 /* Don't call clear_end_of_line if we already wrote the whole
5686 line. The cursor will not be at the right margin in that
5687 case but in the line below. */
5688 if (nlen
< FRAME_TOTAL_COLS (f
))
5690 cursor_to (f
, vpos
, nlen
);
5691 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5694 /* Make sure we are in the right row, otherwise cursor movement
5695 with cmgoto might use `ch' in the wrong row. */
5696 cursor_to (f
, vpos
, 0);
5698 make_current (desired_matrix
, current_matrix
, vpos
);
5702 /* Pretend trailing spaces are not there at all,
5703 unless for one reason or another we must write all spaces. */
5704 if (!write_spaces_p
)
5705 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5708 /* If there's no i/d char, quickly do the best we can without it. */
5709 if (!FRAME_CHAR_INS_DEL_OK (f
))
5713 /* Find the first glyph in desired row that doesn't agree with
5714 a glyph in the current row, and write the rest from there on. */
5715 for (i
= 0; i
< nlen
; i
++)
5717 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5719 /* Find the end of the run of different glyphs. */
5723 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5724 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5727 /* Output this run of non-matching chars. */
5728 cursor_to (f
, vpos
, i
);
5729 write_glyphs (f
, nbody
+ i
, j
- i
);
5732 /* Now find the next non-match. */
5736 /* Clear the rest of the line, or the non-clear part of it. */
5739 cursor_to (f
, vpos
, nlen
);
5740 clear_end_of_line (f
, olen
);
5743 /* Make current row = desired row. */
5744 make_current (desired_matrix
, current_matrix
, vpos
);
5748 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5749 characters in a row. */
5753 /* If current line is blank, skip over initial spaces, if
5754 possible, and write the rest. */
5758 nsp
= count_blanks (nbody
, nlen
);
5762 cursor_to (f
, vpos
, nsp
);
5763 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5766 /* Exchange contents between current_frame and new_frame. */
5767 make_current (desired_matrix
, current_matrix
, vpos
);
5771 /* Compute number of leading blanks in old and new contents. */
5772 osp
= count_blanks (obody
, olen
);
5773 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5775 /* Compute number of matching chars starting with first non-blank. */
5776 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5777 nbody
+ nsp
, nbody
+ nlen
);
5779 /* Spaces in new match implicit space past the end of old. */
5780 /* A bug causing this to be a no-op was fixed in 18.29. */
5781 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5784 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5788 /* Avoid doing insert/delete char
5789 just cause number of leading spaces differs
5790 when the following text does not match. */
5791 if (begmatch
== 0 && osp
!= nsp
)
5792 osp
= nsp
= min (osp
, nsp
);
5794 /* Find matching characters at end of line */
5797 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5799 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5804 endmatch
= obody
+ olen
- op1
;
5806 /* tem gets the distance to insert or delete.
5807 endmatch is how many characters we save by doing so.
5810 tem
= (nlen
- nsp
) - (olen
- osp
);
5812 && (!FRAME_CHAR_INS_DEL_OK (f
)
5813 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5816 /* nsp - osp is the distance to insert or delete.
5817 If that is nonzero, begmatch is known to be nonzero also.
5818 begmatch + endmatch is how much we save by doing the ins/del.
5822 && (!FRAME_CHAR_INS_DEL_OK (f
)
5823 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5827 osp
= nsp
= min (osp
, nsp
);
5830 /* Now go through the line, inserting, writing and
5831 deleting as appropriate. */
5835 cursor_to (f
, vpos
, nsp
);
5836 delete_glyphs (f
, osp
- nsp
);
5840 /* If going to delete chars later in line
5841 and insert earlier in the line,
5842 must delete first to avoid losing data in the insert */
5843 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5845 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5846 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5847 olen
= nlen
- (nsp
- osp
);
5849 cursor_to (f
, vpos
, osp
);
5850 insert_glyphs (f
, 0, nsp
- osp
);
5854 tem
= nsp
+ begmatch
+ endmatch
;
5855 if (nlen
!= tem
|| olen
!= tem
)
5857 if (!endmatch
|| nlen
== olen
)
5859 /* If new text being written reaches right margin, there is
5860 no need to do clear-to-eol at the end of this function
5861 (and it would not be safe, since cursor is not going to
5862 be "at the margin" after the text is done). */
5863 if (nlen
== FRAME_TOTAL_COLS (f
))
5866 /* Function write_glyphs is prepared to do nothing
5867 if passed a length <= 0. Check it here to avoid
5868 unnecessary cursor movement. */
5871 cursor_to (f
, vpos
, nsp
+ begmatch
);
5872 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5875 else if (nlen
> olen
)
5877 /* Here, we used to have the following simple code:
5878 ----------------------------------------
5879 write_glyphs (nbody + nsp + begmatch, olen - tem);
5880 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5881 ----------------------------------------
5882 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5883 is a padding glyph. */
5884 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5887 cursor_to (f
, vpos
, nsp
+ begmatch
);
5889 /* Calculate columns we can actually overwrite. */
5890 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5892 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5894 /* If we left columns to be overwritten, we must delete them. */
5895 del
= olen
- tem
- out
;
5897 delete_glyphs (f
, del
);
5899 /* At last, we insert columns not yet written out. */
5900 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5903 else if (olen
> nlen
)
5905 cursor_to (f
, vpos
, nsp
+ begmatch
);
5906 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5907 delete_glyphs (f
, olen
- nlen
);
5913 /* If any unerased characters remain after the new line, erase them. */
5916 cursor_to (f
, vpos
, nlen
);
5917 clear_end_of_line (f
, olen
);
5920 /* Exchange contents between current_frame and new_frame. */
5921 make_current (desired_matrix
, current_matrix
, vpos
);
5926 /***********************************************************************
5927 X/Y Position -> Buffer Position
5928 ***********************************************************************/
5930 /* Determine what's under window-relative pixel position (*X, *Y).
5931 Return the object (string or buffer) that's there.
5932 Return in *POS the position in that object.
5933 Adjust *X and *Y to character positions. */
5936 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5939 struct display_pos
*pos
;
5940 Lisp_Object
*object
;
5942 int *width
, *height
;
5945 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5946 struct text_pos startp
;
5948 struct glyph_row
*row
;
5949 #ifdef HAVE_WINDOW_SYSTEM
5950 struct image
*img
= 0;
5954 /* We used to set current_buffer directly here, but that does the
5955 wrong thing with `face-remapping-alist' (bug#2044). */
5956 Fset_buffer (w
->buffer
);
5957 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5958 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5959 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5960 start_display (&it
, w
, startp
);
5962 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5963 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5964 MOVE_TO_X
| MOVE_TO_Y
);
5966 Fset_buffer (old_current_buffer
);
5968 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5969 *dy
= *y
- it
.current_y
;
5972 if (STRINGP (it
.string
))
5976 #ifdef HAVE_WINDOW_SYSTEM
5977 if (it
.what
== IT_IMAGE
)
5979 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5980 && !NILP (img
->spec
))
5981 *object
= img
->spec
;
5985 if (it
.vpos
< w
->current_matrix
->nrows
5986 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5989 if (it
.hpos
< row
->used
[TEXT_AREA
])
5991 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5992 #ifdef HAVE_WINDOW_SYSTEM
5995 *dy
-= row
->ascent
- glyph
->ascent
;
5996 *dx
+= glyph
->slice
.x
;
5997 *dy
+= glyph
->slice
.y
;
5998 /* Image slices positions are still relative to the entire image */
5999 *width
= img
->width
;
6000 *height
= img
->height
;
6005 *width
= glyph
->pixel_width
;
6006 *height
= glyph
->ascent
+ glyph
->descent
;
6012 *height
= row
->height
;
6017 *width
= *height
= 0;
6020 /* Add extra (default width) columns if clicked after EOL. */
6021 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
6023 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
6032 /* Value is the string under window-relative coordinates X/Y in the
6033 mode line or header line (PART says which) of window W, or nil if none.
6034 *CHARPOS is set to the position in the string returned. */
6037 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6039 enum window_part part
;
6042 Lisp_Object
*object
;
6044 int *width
, *height
;
6046 struct glyph_row
*row
;
6047 struct glyph
*glyph
, *end
;
6049 Lisp_Object string
= Qnil
;
6051 if (part
== ON_MODE_LINE
)
6052 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
6054 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
6056 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6058 if (row
->mode_line_p
&& row
->enabled_p
)
6060 /* Find the glyph under X. If we find one with a string object,
6061 it's the one we were looking for. */
6062 glyph
= row
->glyphs
[TEXT_AREA
];
6063 end
= glyph
+ row
->used
[TEXT_AREA
];
6064 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6065 x0
-= glyph
->pixel_width
;
6066 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6069 string
= glyph
->object
;
6070 *charpos
= glyph
->charpos
;
6071 *width
= glyph
->pixel_width
;
6072 *height
= glyph
->ascent
+ glyph
->descent
;
6073 #ifdef HAVE_WINDOW_SYSTEM
6074 if (glyph
->type
== IMAGE_GLYPH
)
6077 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6079 *object
= img
->spec
;
6080 y0
-= row
->ascent
- glyph
->ascent
;
6086 /* Add extra (default width) columns if clicked after EOL. */
6087 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6089 *height
= row
->height
;
6096 *width
= *height
= 0;
6106 /* Value is the string under window-relative coordinates X/Y in either
6107 marginal area, or nil if none. *CHARPOS is set to the position in
6108 the string returned. */
6111 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6113 enum window_part part
;
6116 Lisp_Object
*object
;
6118 int *width
, *height
;
6120 struct glyph_row
*row
= w
->current_matrix
->rows
;
6121 struct glyph
*glyph
, *end
;
6122 int x0
, y0
, i
, wy
= *y
;
6124 Lisp_Object string
= Qnil
;
6126 if (part
== ON_LEFT_MARGIN
)
6127 area
= LEFT_MARGIN_AREA
;
6128 else if (part
== ON_RIGHT_MARGIN
)
6129 area
= RIGHT_MARGIN_AREA
;
6133 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6134 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6137 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6141 /* Find the glyph under X. If we find one with a string object,
6142 it's the one we were looking for. */
6143 if (area
== RIGHT_MARGIN_AREA
)
6144 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6145 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6146 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6147 + window_box_width (w
, LEFT_MARGIN_AREA
)
6148 + window_box_width (w
, TEXT_AREA
));
6150 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6151 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6154 glyph
= row
->glyphs
[area
];
6155 end
= glyph
+ row
->used
[area
];
6156 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6157 x0
-= glyph
->pixel_width
;
6158 *x
= glyph
- row
->glyphs
[area
];
6161 string
= glyph
->object
;
6162 *charpos
= glyph
->charpos
;
6163 *width
= glyph
->pixel_width
;
6164 *height
= glyph
->ascent
+ glyph
->descent
;
6165 #ifdef HAVE_WINDOW_SYSTEM
6166 if (glyph
->type
== IMAGE_GLYPH
)
6169 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6171 *object
= img
->spec
;
6172 y0
-= row
->ascent
- glyph
->ascent
;
6173 x0
+= glyph
->slice
.x
;
6174 y0
+= glyph
->slice
.y
;
6180 /* Add extra (default width) columns if clicked after EOL. */
6181 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6183 *height
= row
->height
;
6190 *width
= *height
= 0;
6200 /***********************************************************************
6201 Changing Frame Sizes
6202 ***********************************************************************/
6207 window_change_signal (signalnum
) /* If we don't have an argument, */
6208 int signalnum
; /* some compilers complain in signal calls. */
6214 int old_errno
= errno
;
6216 struct tty_display_info
*tty
;
6218 signal (SIGWINCH
, window_change_signal
);
6219 SIGNAL_THREAD_CHECK (signalnum
);
6221 /* The frame size change obviously applies to a single
6222 termcap-controlled terminal, but we can't decide which.
6223 Therefore, we resize the frames corresponding to each tty.
6225 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6227 if (! tty
->term_initted
)
6230 /* Suspended tty frames have tty->input == NULL avoid trying to
6235 get_tty_size (fileno (tty
->input
), &width
, &height
);
6237 if (width
> 5 && height
> 2) {
6238 Lisp_Object tail
, frame
;
6240 FOR_EACH_FRAME (tail
, frame
)
6241 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6242 /* Record the new sizes, but don't reallocate the data
6243 structures now. Let that be done later outside of the
6245 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6251 #endif /* SIGWINCH */
6254 /* Do any change in frame size that was requested by a signal. SAFE
6255 non-zero means this function is called from a place where it is
6256 safe to change frame sizes while a redisplay is in progress. */
6259 do_pending_window_change (safe
)
6262 /* If window_change_signal should have run before, run it now. */
6263 if (redisplaying_p
&& !safe
)
6266 while (delayed_size_change
)
6268 Lisp_Object tail
, frame
;
6270 delayed_size_change
= 0;
6272 FOR_EACH_FRAME (tail
, frame
)
6274 struct frame
*f
= XFRAME (frame
);
6276 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6277 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6284 /* Change the frame height and/or width. Values may be given as zero to
6285 indicate no change is to take place.
6287 If DELAY is non-zero, then assume we're being called from a signal
6288 handler, and queue the change for later - perhaps the next
6289 redisplay. Since this tries to resize windows, we can't call it
6290 from a signal handler.
6292 SAFE non-zero means this function is called from a place where it's
6293 safe to change frame sizes while a redisplay is in progress. */
6296 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6297 register struct frame
*f
;
6298 int newheight
, newwidth
, pretend
, delay
, safe
;
6300 Lisp_Object tail
, frame
;
6302 if (FRAME_MSDOS_P (f
))
6304 /* On MS-DOS, all frames use the same screen, so a change in
6305 size affects all frames. Termcap now supports multiple
6307 FOR_EACH_FRAME (tail
, frame
)
6308 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6309 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6310 pretend
, delay
, safe
);
6313 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6317 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6318 register struct frame
*f
;
6319 int newheight
, newwidth
, pretend
, delay
, safe
;
6321 int new_frame_total_cols
;
6322 int count
= SPECPDL_INDEX ();
6324 /* If we can't deal with the change now, queue it for later. */
6325 if (delay
|| (redisplaying_p
&& !safe
))
6327 f
->new_text_lines
= newheight
;
6328 f
->new_text_cols
= newwidth
;
6329 delayed_size_change
= 1;
6333 /* This size-change overrides any pending one for this frame. */
6334 f
->new_text_lines
= 0;
6335 f
->new_text_cols
= 0;
6337 /* If an argument is zero, set it to the current value. */
6339 newheight
= FRAME_LINES (f
);
6341 newwidth
= FRAME_COLS (f
);
6343 /* Compute width of windows in F.
6344 This is the width of the frame without vertical scroll bars. */
6345 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6347 /* Round up to the smallest acceptable size. */
6348 check_frame_size (f
, &newheight
, &newwidth
);
6350 /* If we're not changing the frame size, quit now. */
6351 if (newheight
== FRAME_LINES (f
)
6352 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6358 /* We only can set screen dimensions to certain values supported
6359 by our video hardware. Try to find the smallest size greater
6360 or equal to the requested dimensions. */
6361 dos_set_window_size (&newheight
, &newwidth
);
6364 if (newheight
!= FRAME_LINES (f
))
6366 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6368 /* Frame has both root and mini-buffer. */
6369 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6370 FRAME_TOP_MARGIN (f
));
6371 set_window_height (FRAME_ROOT_WINDOW (f
),
6374 - FRAME_TOP_MARGIN (f
)),
6376 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6378 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6381 /* Frame has just one top-level window. */
6382 set_window_height (FRAME_ROOT_WINDOW (f
),
6383 newheight
- FRAME_TOP_MARGIN (f
), 2);
6385 /* MSDOS frames cannot PRETEND, as they change frame size by
6386 manipulating video hardware. */
6387 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6388 FrameRows (FRAME_TTY (f
)) = newheight
;
6391 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6393 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6394 if (FRAME_HAS_MINIBUF_P (f
))
6395 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6397 /* MSDOS frames cannot PRETEND, as they change frame size by
6398 manipulating video hardware. */
6399 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6400 FrameCols (FRAME_TTY (f
)) = newwidth
;
6402 if (WINDOWP (f
->tool_bar_window
))
6403 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6406 FRAME_LINES (f
) = newheight
;
6407 SET_FRAME_COLS (f
, newwidth
);
6410 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6411 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6413 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6415 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6416 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6417 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6418 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6422 calculate_costs (f
);
6423 SET_FRAME_GARBAGED (f
);
6428 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6430 run_window_configuration_change_hook (f
);
6432 unbind_to (count
, Qnil
);
6437 /***********************************************************************
6438 Terminal Related Lisp Functions
6439 ***********************************************************************/
6441 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6442 1, 1, "FOpen termscript file: ",
6443 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6444 FILE = nil means just close any termscript file currently open. */)
6448 struct tty_display_info
*tty
;
6450 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
6451 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
6452 error ("Current frame is not on a tty device");
6456 if (tty
->termscript
!= 0)
6459 fclose (tty
->termscript
);
6462 tty
->termscript
= 0;
6466 file
= Fexpand_file_name (file
, Qnil
);
6467 tty
->termscript
= fopen (SDATA (file
), "w");
6468 if (tty
->termscript
== 0)
6469 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6475 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6476 Ssend_string_to_terminal
, 1, 2, 0,
6477 doc
: /* Send STRING to the terminal without alteration.
6478 Control characters in STRING will have terminal-dependent effects.
6480 Optional parameter TERMINAL specifies the tty terminal device to use.
6481 It may be a terminal object, a frame, or nil for the terminal used by
6482 the currently selected frame. In batch mode, STRING is sent to stdout
6483 when TERMINAL is nil. */)
6486 Lisp_Object terminal
;
6488 struct terminal
*t
= get_terminal (terminal
, 1);
6491 /* ??? Perhaps we should do something special for multibyte strings here. */
6492 CHECK_STRING (string
);
6496 error ("Unknown terminal device");
6498 if (t
->type
== output_initial
)
6500 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
6501 error ("Device %d is not a termcap terminal device", t
->id
);
6504 struct tty_display_info
*tty
= t
->display_info
.tty
;
6507 error ("Terminal is currently suspended");
6509 if (tty
->termscript
)
6511 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6512 fflush (tty
->termscript
);
6516 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
6523 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6524 doc
: /* Beep, or flash the screen.
6525 Also, unless an argument is given,
6526 terminate any keyboard macro currently executing. */)
6535 ring_bell (XFRAME (selected_frame
));
6548 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6549 error ("Keyboard macro terminated by a command ringing the bell");
6551 ring_bell (XFRAME (selected_frame
));
6556 /***********************************************************************
6558 ***********************************************************************/
6560 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6561 doc
: /* Pause, without updating display, for SECONDS seconds.
6562 SECONDS may be a floating-point value, meaning that you can wait for a
6563 fraction of a second. Optional second arg MILLISECONDS specifies an
6564 additional wait period, in milliseconds; this may be useful if your
6565 Emacs was built without floating point support.
6566 \(Not all operating systems support waiting for a fraction of a second.) */)
6567 (seconds
, milliseconds
)
6568 Lisp_Object seconds
, milliseconds
;
6572 if (NILP (milliseconds
))
6573 XSETINT (milliseconds
, 0);
6575 CHECK_NUMBER (milliseconds
);
6576 usec
= XINT (milliseconds
) * 1000;
6579 double duration
= extract_float (seconds
);
6580 sec
= (int) duration
;
6581 usec
+= (duration
- sec
) * 1000000;
6584 #ifndef EMACS_HAS_USECS
6585 if (sec
== 0 && usec
!= 0)
6586 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6589 /* Assure that 0 <= usec < 1000000. */
6592 /* We can't rely on the rounding being correct if usec is negative. */
6593 if (-1000000 < usec
)
6594 sec
--, usec
+= 1000000;
6596 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6599 sec
+= usec
/ 1000000, usec
%= 1000000;
6601 if (sec
< 0 || (sec
== 0 && usec
== 0))
6604 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6610 /* This is just like wait_reading_process_output, except that
6613 TIMEOUT is number of seconds to wait (float or integer),
6614 or t to wait forever.
6615 READING is 1 if reading input.
6616 If DO_DISPLAY is >0 display process output while waiting.
6617 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6621 sit_for (timeout
, reading
, do_display
)
6622 Lisp_Object timeout
;
6623 int reading
, do_display
;
6627 swallow_events (do_display
);
6629 if ((detect_input_pending_run_timers (do_display
))
6630 || !NILP (Vexecuting_kbd_macro
))
6633 if (do_display
>= 2)
6634 redisplay_preserve_echo_area (2);
6636 if (INTEGERP (timeout
))
6638 sec
= XINT (timeout
);
6641 else if (FLOATP (timeout
))
6643 double seconds
= XFLOAT_DATA (timeout
);
6644 sec
= (int) seconds
;
6645 usec
= (int) ((seconds
- sec
) * 1000000);
6647 else if (EQ (timeout
, Qt
))
6653 wrong_type_argument (Qnumberp
, timeout
);
6655 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6662 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6665 return detect_input_pending () ? Qnil
: Qt
;
6669 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6670 doc
: /* Perform redisplay if no input is available.
6671 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6672 perform a full redisplay even if input is available.
6673 Return t if redisplay was performed, nil otherwise. */)
6680 if ((detect_input_pending_run_timers (1)
6681 && NILP (force
) && !redisplay_dont_pause
)
6682 || !NILP (Vexecuting_kbd_macro
))
6685 count
= SPECPDL_INDEX ();
6686 if (!NILP (force
) && !redisplay_dont_pause
)
6687 specbind (Qredisplay_dont_pause
, Qt
);
6688 redisplay_preserve_echo_area (2);
6689 unbind_to (count
, Qnil
);
6695 /***********************************************************************
6696 Other Lisp Functions
6697 ***********************************************************************/
6699 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6700 session's frames, frame names, buffers, buffer-read-only flags, and
6701 buffer-modified-flags. */
6703 static Lisp_Object frame_and_buffer_state
;
6706 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6707 Sframe_or_buffer_changed_p
, 0, 1, 0,
6708 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6709 VARIABLE is a variable name whose value is either nil or a state vector
6710 that will be updated to contain all frames and buffers,
6711 aside from buffers whose names start with space,
6712 along with the buffers' read-only and modified flags. This allows a fast
6713 check to see whether buffer menus might need to be recomputed.
6714 If this function returns non-nil, it updates the internal vector to reflect
6717 If VARIABLE is nil, an internal variable is used. Users should not
6718 pass nil for VARIABLE. */)
6720 Lisp_Object variable
;
6722 Lisp_Object state
, tail
, frame
, buf
;
6723 Lisp_Object
*vecp
, *end
;
6726 if (! NILP (variable
))
6728 CHECK_SYMBOL (variable
);
6729 state
= Fsymbol_value (variable
);
6730 if (! VECTORP (state
))
6734 state
= frame_and_buffer_state
;
6736 vecp
= XVECTOR (state
)->contents
;
6737 end
= vecp
+ XVECTOR (state
)->size
;
6739 FOR_EACH_FRAME (tail
, frame
)
6743 if (!EQ (*vecp
++, frame
))
6747 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6750 /* Check that the buffer info matches. */
6751 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6753 buf
= XCDR (XCAR (tail
));
6754 /* Ignore buffers that aren't included in buffer lists. */
6755 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6759 if (!EQ (*vecp
++, buf
))
6763 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6767 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6772 /* Detect deletion of a buffer at the end of the list. */
6773 if (EQ (*vecp
, Qlambda
))
6776 /* Come here if we decide the data has changed. */
6778 /* Count the size we will need.
6779 Start with 1 so there is room for at least one lambda at the end. */
6781 FOR_EACH_FRAME (tail
, frame
)
6783 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6785 /* Reallocate the vector if data has grown to need it,
6786 or if it has shrunk a lot. */
6787 if (! VECTORP (state
)
6788 || n
> XVECTOR (state
)->size
6789 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6790 /* Add 20 extra so we grow it less often. */
6792 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6793 if (! NILP (variable
))
6794 Fset (variable
, state
);
6796 frame_and_buffer_state
= state
;
6799 /* Record the new data in the (possibly reallocated) vector. */
6800 vecp
= XVECTOR (state
)->contents
;
6801 FOR_EACH_FRAME (tail
, frame
)
6804 *vecp
++ = XFRAME (frame
)->name
;
6806 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6808 buf
= XCDR (XCAR (tail
));
6809 /* Ignore buffers that aren't included in buffer lists. */
6810 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6813 *vecp
++ = XBUFFER (buf
)->read_only
;
6814 *vecp
++ = Fbuffer_modified_p (buf
);
6816 /* Fill up the vector with lambdas (always at least one). */
6818 while (vecp
- XVECTOR (state
)->contents
6819 < XVECTOR (state
)->size
)
6821 /* Make sure we didn't overflow the vector. */
6822 if (vecp
- XVECTOR (state
)->contents
6823 > XVECTOR (state
)->size
)
6830 /***********************************************************************
6832 ***********************************************************************/
6834 /* Initialization done when Emacs fork is started, before doing stty.
6835 Determine terminal type and set terminal_driver. Then invoke its
6836 decoding routine to set up variables in the terminal package. */
6841 char *terminal_type
;
6843 #ifdef HAVE_X_WINDOWS
6844 extern int display_arg
;
6847 /* Construct the space glyph. */
6848 space_glyph
.type
= CHAR_GLYPH
;
6849 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6850 space_glyph
.charpos
= -1;
6853 cursor_in_echo_area
= 0;
6854 terminal_type
= (char *) 0;
6856 /* Now is the time to initialize this; it's used by init_sys_modes
6858 Vinitial_window_system
= Qnil
;
6860 /* SIGWINCH needs to be handled no matter what display we start
6861 with. Otherwise newly opened tty frames will not resize
6866 #endif /* CANNOT_DUMP */
6867 signal (SIGWINCH
, window_change_signal
);
6868 #endif /* SIGWINCH */
6870 /* If running as a daemon, no need to initialize any frames/terminal. */
6874 /* If the user wants to use a window system, we shouldn't bother
6875 initializing the terminal. This is especially important when the
6876 terminal is so dumb that emacs gives up before and doesn't bother
6877 using the window system.
6879 If the DISPLAY environment variable is set and nonempty,
6880 try to use X, and die with an error message if that doesn't work. */
6882 #ifdef HAVE_X_WINDOWS
6883 if (! inhibit_window_system
&& ! display_arg
)
6886 display
= getenv ("DISPLAY");
6887 display_arg
= (display
!= 0 && *display
!= 0);
6889 if (display_arg
&& !x_display_ok (display
))
6891 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6893 inhibit_window_system
= 1;
6897 if (!inhibit_window_system
&& display_arg
6903 Vinitial_window_system
= Qx
;
6905 Vwindow_system_version
= make_number (11);
6907 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6908 /* In some versions of ncurses,
6909 tputs crashes if we have not called tgetent.
6911 { char b
[2044]; tgetent (b
, "xterm");}
6913 adjust_frame_glyphs_initially ();
6916 #endif /* HAVE_X_WINDOWS */
6919 if (!inhibit_window_system
)
6921 Vinitial_window_system
= Qw32
;
6922 Vwindow_system_version
= make_number (1);
6923 adjust_frame_glyphs_initially ();
6926 #endif /* HAVE_NTGUI */
6929 if (!inhibit_window_system
6935 Vinitial_window_system
= Qns
;
6936 Vwindow_system_version
= make_number(10);
6937 adjust_frame_glyphs_initially ();
6942 /* If no window system has been specified, try to use the terminal. */
6945 fatal ("standard input is not a tty");
6950 terminal_type
= "w32console";
6952 /* Look at the TERM variable. */
6953 terminal_type
= (char *) getenv ("TERM");
6957 #ifdef HAVE_WINDOW_SYSTEM
6958 if (! inhibit_window_system
)
6959 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6961 #endif /* HAVE_WINDOW_SYSTEM */
6962 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6968 struct frame
*f
= XFRAME (selected_frame
);
6970 /* Open a display on the controlling tty. */
6971 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6973 /* Convert the initial frame to use the new display. */
6974 if (f
->output_method
!= output_initial
)
6976 f
->output_method
= t
->type
;
6979 t
->reference_count
++;
6980 t
->display_info
.tty
->top_frame
= selected_frame
;
6981 change_frame_size (XFRAME (selected_frame
),
6982 FrameRows (t
->display_info
.tty
),
6983 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6985 /* Delete the initial terminal. */
6986 if (--initial_terminal
->reference_count
== 0
6987 && initial_terminal
->delete_terminal_hook
)
6988 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6990 /* Update frame parameters to reflect the new type. */
6991 Fmodify_frame_parameters
6992 (selected_frame
, Fcons (Fcons (Qtty_type
,
6993 Ftty_type (selected_frame
)), Qnil
));
6994 if (t
->display_info
.tty
->name
)
6995 Fmodify_frame_parameters (selected_frame
,
6996 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6999 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
7004 struct frame
*sf
= SELECTED_FRAME ();
7005 int width
= FRAME_TOTAL_COLS (sf
);
7006 int height
= FRAME_LINES (sf
);
7008 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
7010 /* If these sizes are so big they cause overflow, just ignore the
7011 change. It's not clear what better we could do. */
7012 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
7013 fatal ("screen size %dx%d too big", width
, height
);
7016 adjust_frame_glyphs_initially ();
7017 calculate_costs (XFRAME (selected_frame
));
7019 /* Set up faces of the initial terminal frame of a dumped Emacs. */
7022 && NILP (Vinitial_window_system
))
7024 /* For the initial frame, we don't have any way of knowing what
7025 are the foreground and background colors of the terminal. */
7026 struct frame
*sf
= SELECTED_FRAME();
7028 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
7029 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
7030 call0 (intern ("tty-set-up-initial-frame-faces"));
7036 /***********************************************************************
7038 ***********************************************************************/
7040 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
7041 Sinternal_show_cursor
, 2, 2, 0,
7042 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
7043 WINDOW nil means use the selected window. SHOW non-nil means
7044 show a cursor in WINDOW in the next redisplay. SHOW nil means
7045 don't show a cursor. */)
7047 Lisp_Object window
, show
;
7049 /* Don't change cursor state while redisplaying. This could confuse
7051 if (!redisplaying_p
)
7054 window
= selected_window
;
7056 CHECK_WINDOW (window
);
7058 XWINDOW (window
)->cursor_off_p
= NILP (show
);
7065 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
7066 Sinternal_show_cursor_p
, 0, 1, 0,
7067 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
7068 WINDOW nil or omitted means report on the selected window. */)
7075 window
= selected_window
;
7077 CHECK_WINDOW (window
);
7079 w
= XWINDOW (window
);
7080 return w
->cursor_off_p
? Qnil
: Qt
;
7083 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
7084 Slast_nonminibuf_frame
, 0, 0, 0,
7085 doc
: /* Value is last nonminibuffer frame. */)
7088 Lisp_Object frame
= Qnil
;
7090 if (last_nonminibuf_frame
)
7091 XSETFRAME (frame
, last_nonminibuf_frame
);
7096 /***********************************************************************
7098 ***********************************************************************/
7103 defsubr (&Sredraw_frame
);
7104 defsubr (&Sredraw_display
);
7105 defsubr (&Sframe_or_buffer_changed_p
);
7106 defsubr (&Sopen_termscript
);
7108 defsubr (&Sredisplay
);
7109 defsubr (&Ssleep_for
);
7110 defsubr (&Ssend_string_to_terminal
);
7111 defsubr (&Sinternal_show_cursor
);
7112 defsubr (&Sinternal_show_cursor_p
);
7113 defsubr (&Slast_nonminibuf_frame
);
7116 defsubr (&Sdump_redisplay_history
);
7119 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
7120 staticpro (&frame_and_buffer_state
);
7122 Qdisplay_table
= intern_c_string ("display-table");
7123 staticpro (&Qdisplay_table
);
7124 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
7125 staticpro (&Qredisplay_dont_pause
);
7127 DEFVAR_INT ("baud-rate", &baud_rate
,
7128 doc
: /* *The output baud rate of the terminal.
7129 On most systems, changing this value will affect the amount of padding
7130 and the other strategic decisions made during redisplay. */);
7132 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7133 doc
: /* *Non-nil means invert the entire frame display.
7134 This means everything is in inverse video which otherwise would not be. */);
7136 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7137 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7139 See also `ring-bell-function'. */);
7141 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7142 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7143 A non-nil value is useful if the terminal can automatically preserve
7144 Emacs's frame display when you reenter Emacs.
7145 It is up to you to set this variable if your terminal can do that. */);
7147 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
7148 doc
: /* Name of the window system that Emacs uses for the first frame.
7149 The value is a symbol--for instance, `x' for X windows.
7150 The value is nil if Emacs is using a text-only terminal. */);
7152 DEFVAR_KBOARD ("window-system", Vwindow_system
,
7153 doc
: /* Name of window system through which the selected frame is displayed.
7154 The value is a symbol--for instance, `x' for X windows.
7155 The value is nil if the selected frame is on a text-only-terminal. */);
7157 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7158 doc
: /* The version number of the window system in use.
7159 For X windows, this is 11. */);
7161 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7162 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7164 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7165 doc
: /* Table defining how to output a glyph code to the frame.
7166 If not nil, this is a vector indexed by glyph code to define the glyph.
7167 Each element can be:
7168 integer: a glyph code which this glyph is an alias for.
7169 string: output this glyph using that string (not impl. in X windows).
7170 nil: this glyph mod 524288 is the code of a character to output,
7171 and this glyph / 524288 is the face number (see `face-id') to use
7172 while outputting it. */);
7173 Vglyph_table
= Qnil
;
7175 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7176 doc
: /* Display table to use for buffers that specify none.
7177 See `buffer-display-table' for more information. */);
7178 Vstandard_display_table
= Qnil
;
7180 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7181 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7182 redisplay_dont_pause
= 0;
7184 #if PERIODIC_PREEMPTION_CHECKING
7185 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7186 doc
: /* *The period in seconds between checking for input during redisplay.
7187 If input is detected, redisplay is pre-empted, and the input is processed.
7188 If nil, never pre-empt redisplay. */);
7189 Vredisplay_preemption_period
= make_float (0.10);
7196 Vinitial_window_system
= Qnil
;
7197 Vwindow_system_version
= Qnil
;
7201 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7202 (do not change this comment) */