1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* 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 unsigned rp
= row
->reversed_p
;
1393 clear_glyph_row (row
);
1395 row
->reversed_p
= rp
;
1400 /* Return a hash code for glyph row ROW. */
1403 line_hash_code (row
)
1404 struct glyph_row
*row
;
1410 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1411 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1415 int c
= glyph
->u
.ch
;
1416 int face_id
= glyph
->face_id
;
1417 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1419 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1420 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1432 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1433 the number of characters in the line. If must_write_spaces is
1434 zero, leading and trailing spaces are ignored. */
1437 line_draw_cost (matrix
, vpos
)
1438 struct glyph_matrix
*matrix
;
1441 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1442 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1443 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1445 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1446 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1448 /* Ignore trailing and leading spaces if we can. */
1449 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1451 /* Skip from the end over trailing spaces. */
1452 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1455 /* All blank line. */
1459 /* Skip over leading spaces. */
1460 while (CHAR_GLYPH_SPACE_P (*beg
))
1464 /* If we don't have a glyph-table, each glyph is one character,
1465 so return the number of glyphs. */
1466 if (glyph_table_base
== 0)
1470 /* Otherwise, scan the glyphs and accumulate their total length
1477 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1479 if (GLYPH_INVALID_P (g
)
1480 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1483 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1493 /* Test two glyph rows A and B for equality. Value is non-zero if A
1494 and B have equal contents. W is the window to which the glyphs
1495 rows A and B belong. It is needed here to test for partial row
1496 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1497 flags of A and B, too. */
1500 row_equal_p (w
, a
, b
, mouse_face_p
)
1502 struct glyph_row
*a
, *b
;
1507 else if (a
->hash
!= b
->hash
)
1511 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1514 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1517 /* Compare glyphs. */
1518 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1520 if (a
->used
[area
] != b
->used
[area
])
1523 a_glyph
= a
->glyphs
[area
];
1524 a_end
= a_glyph
+ a
->used
[area
];
1525 b_glyph
= b
->glyphs
[area
];
1527 while (a_glyph
< a_end
1528 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1529 ++a_glyph
, ++b_glyph
;
1531 if (a_glyph
!= a_end
)
1535 if (a
->fill_line_p
!= b
->fill_line_p
1536 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1537 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1538 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1539 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1540 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1541 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1542 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1543 || a
->overlapped_p
!= b
->overlapped_p
1544 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1545 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1546 /* Different partially visible characters on left margin. */
1548 /* Different height. */
1549 || a
->ascent
!= b
->ascent
1550 || a
->phys_ascent
!= b
->phys_ascent
1551 || a
->phys_height
!= b
->phys_height
1552 || a
->visible_height
!= b
->visible_height
)
1561 /***********************************************************************
1564 See dispextern.h for an overall explanation of glyph pools.
1565 ***********************************************************************/
1567 /* Allocate a glyph_pool structure. The structure returned is
1568 initialized with zeros. The global variable glyph_pool_count is
1569 incremented for each pool allocated. */
1571 static struct glyph_pool
*
1574 struct glyph_pool
*result
;
1576 /* Allocate a new glyph_pool and clear it. */
1577 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1578 bzero (result
, sizeof *result
);
1580 /* For memory leak and double deletion checking. */
1587 /* Free a glyph_pool structure POOL. The function may be called with
1588 a null POOL pointer. The global variable glyph_pool_count is
1589 decremented with every pool structure freed. If this count gets
1590 negative, more structures were freed than allocated, i.e. one
1591 structure must have been freed more than once or a bogus pointer
1592 was passed to free_glyph_pool. */
1595 free_glyph_pool (pool
)
1596 struct glyph_pool
*pool
;
1600 /* More freed than allocated? */
1602 xassert (glyph_pool_count
>= 0);
1604 xfree (pool
->glyphs
);
1610 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1611 columns we need. This function never shrinks a pool. The only
1612 case in which this would make sense, would be when a frame's size
1613 is changed from a large value to a smaller one. But, if someone
1614 does it once, we can expect that he will do it again.
1616 Value is non-zero if the pool changed in a way which makes
1617 re-adjusting window glyph matrices necessary. */
1620 realloc_glyph_pool (pool
, matrix_dim
)
1621 struct glyph_pool
*pool
;
1622 struct dim matrix_dim
;
1627 changed_p
= (pool
->glyphs
== 0
1628 || matrix_dim
.height
!= pool
->nrows
1629 || matrix_dim
.width
!= pool
->ncolumns
);
1631 /* Enlarge the glyph pool. */
1632 needed
= matrix_dim
.width
* matrix_dim
.height
;
1633 if (needed
> pool
->nglyphs
)
1635 int size
= needed
* sizeof (struct glyph
);
1638 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1641 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1642 bzero (pool
->glyphs
, size
);
1645 pool
->nglyphs
= needed
;
1648 /* Remember the number of rows and columns because (a) we use them
1649 to do sanity checks, and (b) the number of columns determines
1650 where rows in the frame matrix start---this must be available to
1651 determine pointers to rows of window sub-matrices. */
1652 pool
->nrows
= matrix_dim
.height
;
1653 pool
->ncolumns
= matrix_dim
.width
;
1660 /***********************************************************************
1662 ***********************************************************************/
1667 /* Flush standard output. This is sometimes useful to call from the debugger.
1668 XXX Maybe this should be changed to flush the current terminal instead of
1679 /* Check that no glyph pointers have been lost in MATRIX. If a
1680 pointer has been lost, e.g. by using a structure assignment between
1681 rows, at least one pointer must occur more than once in the rows of
1685 check_matrix_pointer_lossage (matrix
)
1686 struct glyph_matrix
*matrix
;
1690 for (i
= 0; i
< matrix
->nrows
; ++i
)
1691 for (j
= 0; j
< matrix
->nrows
; ++j
)
1693 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1694 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1698 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1701 matrix_row (matrix
, row
)
1702 struct glyph_matrix
*matrix
;
1705 xassert (matrix
&& matrix
->rows
);
1706 xassert (row
>= 0 && row
< matrix
->nrows
);
1708 /* That's really too slow for normal testing because this function
1709 is called almost everywhere. Although---it's still astonishingly
1710 fast, so it is valuable to have for debugging purposes. */
1712 check_matrix_pointer_lossage (matrix
);
1715 return matrix
->rows
+ row
;
1719 #if 0 /* This function makes invalid assumptions when text is
1720 partially invisible. But it might come handy for debugging
1723 /* Check invariants that must hold for an up to date current matrix of
1727 check_matrix_invariants (w
)
1730 struct glyph_matrix
*matrix
= w
->current_matrix
;
1731 int yb
= window_text_bottom_y (w
);
1732 struct glyph_row
*row
= matrix
->rows
;
1733 struct glyph_row
*last_text_row
= NULL
;
1734 struct buffer
*saved
= current_buffer
;
1735 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1738 /* This can sometimes happen for a fresh window. */
1739 if (matrix
->nrows
< 2)
1742 set_buffer_temp (buffer
);
1744 /* Note: last row is always reserved for the mode line. */
1745 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1746 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1748 struct glyph_row
*next
= row
+ 1;
1750 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1751 last_text_row
= row
;
1753 /* Check that character and byte positions are in sync. */
1754 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1755 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1757 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1758 have such a position temporarily in case of a minibuffer
1759 displaying something like `[Sole completion]' at its end. */
1760 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1761 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1762 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1764 /* Check that end position of `row' is equal to start position
1766 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1768 xassert (MATRIX_ROW_END_CHARPOS (row
)
1769 == MATRIX_ROW_START_CHARPOS (next
));
1770 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1771 == MATRIX_ROW_START_BYTEPOS (next
));
1776 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1777 xassert (w
->desired_matrix
->rows
!= NULL
);
1778 set_buffer_temp (saved
);
1783 #endif /* GLYPH_DEBUG != 0 */
1787 /**********************************************************************
1788 Allocating/ Adjusting Glyph Matrices
1789 **********************************************************************/
1791 /* Allocate glyph matrices over a window tree for a frame-based
1794 X and Y are column/row within the frame glyph matrix where
1795 sub-matrices for the window tree rooted at WINDOW must be
1796 allocated. DIM_ONLY_P non-zero means that the caller of this
1797 function is only interested in the result matrix dimension, and
1798 matrix adjustments should not be performed.
1800 The function returns the total width/height of the sub-matrices of
1801 the window tree. If called on a frame root window, the computation
1802 will take the mini-buffer window into account.
1804 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1806 NEW_LEAF_MATRIX set if any window in the tree did not have a
1807 glyph matrices yet, and
1809 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1810 any window in the tree will be changed or have been changed (see
1813 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1816 Windows are arranged into chains of windows on the same level
1817 through the next fields of window structures. Such a level can be
1818 either a sequence of horizontally adjacent windows from left to
1819 right, or a sequence of vertically adjacent windows from top to
1820 bottom. Each window in a horizontal sequence can be either a leaf
1821 window or a vertical sequence; a window in a vertical sequence can
1822 be either a leaf or a horizontal sequence. All windows in a
1823 horizontal sequence have the same height, and all windows in a
1824 vertical sequence have the same width.
1826 This function uses, for historical reasons, a more general
1827 algorithm to determine glyph matrix dimensions that would be
1830 The matrix height of a horizontal sequence is determined by the
1831 maximum height of any matrix in the sequence. The matrix width of
1832 a horizontal sequence is computed by adding up matrix widths of
1833 windows in the sequence.
1835 |<------- result width ------->|
1836 +---------+----------+---------+ ---
1839 +---------+ | | result height
1844 The matrix width of a vertical sequence is the maximum matrix width
1845 of any window in the sequence. Its height is computed by adding up
1846 matrix heights of windows in the sequence.
1848 |<---- result width -->|
1856 +------------+---------+ |
1859 +------------+---------+ --- */
1861 /* Bit indicating that a new matrix will be allocated or has been
1864 #define NEW_LEAF_MATRIX (1 << 0)
1866 /* Bit indicating that a matrix will or has changed its location or
1869 #define CHANGED_LEAF_MATRIX (1 << 1)
1872 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1873 window_change_flags
)
1877 int *window_change_flags
;
1879 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1881 int wmax
= 0, hmax
= 0;
1885 int in_horz_combination_p
;
1887 /* What combination is WINDOW part of? Compute this once since the
1888 result is the same for all windows in the `next' chain. The
1889 special case of a root window (parent equal to nil) is treated
1890 like a vertical combination because a root window's `next'
1891 points to the mini-buffer window, if any, which is arranged
1892 vertically below other windows. */
1893 in_horz_combination_p
1894 = (!NILP (XWINDOW (window
)->parent
)
1895 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1897 /* For WINDOW and all windows on the same level. */
1900 w
= XWINDOW (window
);
1902 /* Get the dimension of the window sub-matrix for W, depending
1903 on whether this is a combination or a leaf window. */
1904 if (!NILP (w
->hchild
))
1905 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1907 window_change_flags
);
1908 else if (!NILP (w
->vchild
))
1909 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1911 window_change_flags
);
1914 /* If not already done, allocate sub-matrix structures. */
1915 if (w
->desired_matrix
== NULL
)
1917 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1918 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1919 *window_change_flags
|= NEW_LEAF_MATRIX
;
1922 /* Width and height MUST be chosen so that there are no
1923 holes in the frame matrix. */
1924 dim
.width
= required_matrix_width (w
);
1925 dim
.height
= required_matrix_height (w
);
1927 /* Will matrix be re-allocated? */
1928 if (x
!= w
->desired_matrix
->matrix_x
1929 || y
!= w
->desired_matrix
->matrix_y
1930 || dim
.width
!= w
->desired_matrix
->matrix_w
1931 || dim
.height
!= w
->desired_matrix
->matrix_h
1932 || (margin_glyphs_to_reserve (w
, dim
.width
,
1933 w
->left_margin_cols
)
1934 != w
->desired_matrix
->left_margin_glyphs
)
1935 || (margin_glyphs_to_reserve (w
, dim
.width
,
1936 w
->right_margin_cols
)
1937 != w
->desired_matrix
->right_margin_glyphs
))
1938 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1940 /* Actually change matrices, if allowed. Do not consider
1941 CHANGED_LEAF_MATRIX computed above here because the pool
1942 may have been changed which we don't now here. We trust
1943 that we only will be called with DIM_ONLY_P != 0 when
1947 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1948 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1952 /* If we are part of a horizontal combination, advance x for
1953 windows to the right of W; otherwise advance y for windows
1955 if (in_horz_combination_p
)
1960 /* Remember maximum glyph matrix dimensions. */
1961 wmax
= max (wmax
, dim
.width
);
1962 hmax
= max (hmax
, dim
.height
);
1964 /* Next window on same level. */
1967 while (!NILP (window
));
1969 /* Set `total' to the total glyph matrix dimension of this window
1970 level. In a vertical combination, the width is the width of the
1971 widest window; the height is the y we finally reached, corrected
1972 by the y we started with. In a horizontal combination, the total
1973 height is the height of the tallest window, and the width is the
1974 x we finally reached, corrected by the x we started with. */
1975 if (in_horz_combination_p
)
1977 total
.width
= x
- x0
;
1978 total
.height
= hmax
;
1983 total
.height
= y
- y0
;
1990 /* Return the required height of glyph matrices for window W. */
1993 required_matrix_height (w
)
1996 #ifdef HAVE_WINDOW_SYSTEM
1997 struct frame
*f
= XFRAME (w
->frame
);
1999 if (FRAME_WINDOW_P (f
))
2001 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2002 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
2003 return (((window_pixel_height
+ ch_height
- 1)
2004 / ch_height
) * w
->nrows_scale_factor
2005 /* One partially visible line at the top and
2006 bottom of the window. */
2008 /* 2 for header and mode line. */
2011 #endif /* HAVE_WINDOW_SYSTEM */
2013 return WINDOW_TOTAL_LINES (w
);
2017 /* Return the required width of glyph matrices for window W. */
2020 required_matrix_width (w
)
2023 #ifdef HAVE_WINDOW_SYSTEM
2024 struct frame
*f
= XFRAME (w
->frame
);
2025 if (FRAME_WINDOW_P (f
))
2027 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2028 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2030 /* Compute number of glyphs needed in a glyph row. */
2031 return (((window_pixel_width
+ ch_width
- 1)
2032 / ch_width
) * w
->ncols_scale_factor
2033 /* 2 partially visible columns in the text area. */
2035 /* One partially visible column at the right
2036 edge of each marginal area. */
2039 #endif /* HAVE_WINDOW_SYSTEM */
2041 return XINT (w
->total_cols
);
2045 /* Allocate window matrices for window-based redisplay. W is the
2046 window whose matrices must be allocated/reallocated. */
2049 allocate_matrices_for_window_redisplay (w
)
2054 if (!NILP (w
->vchild
))
2055 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2056 else if (!NILP (w
->hchild
))
2057 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2060 /* W is a leaf window. */
2063 /* If matrices are not yet allocated, allocate them now. */
2064 if (w
->desired_matrix
== NULL
)
2066 w
->desired_matrix
= new_glyph_matrix (NULL
);
2067 w
->current_matrix
= new_glyph_matrix (NULL
);
2070 dim
.width
= required_matrix_width (w
);
2071 dim
.height
= required_matrix_height (w
);
2072 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2073 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2076 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2081 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2082 do it for all frames; otherwise do it just for the given frame.
2083 This function must be called when a new frame is created, its size
2084 changes, or its window configuration changes. */
2090 /* Block input so that expose events and other events that access
2091 glyph matrices are not processed while we are changing them. */
2095 adjust_frame_glyphs (f
);
2098 Lisp_Object tail
, lisp_frame
;
2100 FOR_EACH_FRAME (tail
, lisp_frame
)
2101 adjust_frame_glyphs (XFRAME (lisp_frame
));
2108 /* Adjust frame glyphs when Emacs is initialized.
2110 To be called from init_display.
2112 We need a glyph matrix because redraw will happen soon.
2113 Unfortunately, window sizes on selected_frame are not yet set to
2114 meaningful values. I believe we can assume that there are only two
2115 windows on the frame---the mini-buffer and the root window. Frame
2116 height and width seem to be correct so far. So, set the sizes of
2117 windows to estimated values. */
2120 adjust_frame_glyphs_initially ()
2122 struct frame
*sf
= SELECTED_FRAME ();
2123 struct window
*root
= XWINDOW (sf
->root_window
);
2124 struct window
*mini
= XWINDOW (root
->next
);
2125 int frame_lines
= FRAME_LINES (sf
);
2126 int frame_cols
= FRAME_COLS (sf
);
2127 int top_margin
= FRAME_TOP_MARGIN (sf
);
2129 /* Do it for the root window. */
2130 XSETFASTINT (root
->top_line
, top_margin
);
2131 XSETFASTINT (root
->total_cols
, frame_cols
);
2132 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2134 /* Do it for the mini-buffer window. */
2135 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2136 XSETFASTINT (mini
->total_cols
, frame_cols
);
2137 set_window_height (root
->next
, 1, 0);
2139 adjust_frame_glyphs (sf
);
2140 glyphs_initialized_initially_p
= 1;
2144 /* Allocate/reallocate glyph matrices of a single frame F. */
2147 adjust_frame_glyphs (f
)
2150 if (FRAME_WINDOW_P (f
))
2151 adjust_frame_glyphs_for_window_redisplay (f
);
2153 adjust_frame_glyphs_for_frame_redisplay (f
);
2155 /* Don't forget the message buffer and the buffer for
2156 decode_mode_spec. */
2157 adjust_frame_message_buffer (f
);
2158 adjust_decode_mode_spec_buffer (f
);
2160 f
->glyphs_initialized_p
= 1;
2163 /* Return 1 if any window in the tree has nonzero window margins. See
2164 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2166 showing_window_margins_p (w
)
2171 if (!NILP (w
->hchild
))
2173 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2176 else if (!NILP (w
->vchild
))
2178 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2181 else if (!NILP (w
->left_margin_cols
)
2182 || !NILP (w
->right_margin_cols
))
2185 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2191 /* In the window tree with root W, build current matrices of leaf
2192 windows from the frame's current matrix. */
2195 fake_current_matrices (window
)
2200 for (; !NILP (window
); window
= w
->next
)
2202 w
= XWINDOW (window
);
2204 if (!NILP (w
->hchild
))
2205 fake_current_matrices (w
->hchild
);
2206 else if (!NILP (w
->vchild
))
2207 fake_current_matrices (w
->vchild
);
2211 struct frame
*f
= XFRAME (w
->frame
);
2212 struct glyph_matrix
*m
= w
->current_matrix
;
2213 struct glyph_matrix
*fm
= f
->current_matrix
;
2215 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2216 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2218 for (i
= 0; i
< m
->matrix_h
; ++i
)
2220 struct glyph_row
*r
= m
->rows
+ i
;
2221 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2223 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2224 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2226 r
->enabled_p
= fr
->enabled_p
;
2229 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2230 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2231 r
->used
[TEXT_AREA
] = (m
->matrix_w
2232 - r
->used
[LEFT_MARGIN_AREA
]
2233 - r
->used
[RIGHT_MARGIN_AREA
]);
2242 /* Save away the contents of frame F's current frame matrix. Value is
2243 a glyph matrix holding the contents of F's current frame matrix. */
2245 static struct glyph_matrix
*
2246 save_current_matrix (f
)
2250 struct glyph_matrix
*saved
;
2252 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2253 bzero (saved
, sizeof *saved
);
2254 saved
->nrows
= f
->current_matrix
->nrows
;
2255 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2256 * sizeof *saved
->rows
);
2257 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2259 for (i
= 0; i
< saved
->nrows
; ++i
)
2261 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2262 struct glyph_row
*to
= saved
->rows
+ i
;
2263 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2264 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2265 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2266 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2273 /* Restore the contents of frame F's current frame matrix from SAVED,
2274 and free memory associated with SAVED. */
2277 restore_current_matrix (f
, saved
)
2279 struct glyph_matrix
*saved
;
2283 for (i
= 0; i
< saved
->nrows
; ++i
)
2285 struct glyph_row
*from
= saved
->rows
+ i
;
2286 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2287 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2288 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2289 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2290 xfree (from
->glyphs
[TEXT_AREA
]);
2293 xfree (saved
->rows
);
2299 /* Allocate/reallocate glyph matrices of a single frame F for
2300 frame-based redisplay. */
2303 adjust_frame_glyphs_for_frame_redisplay (f
)
2306 struct dim matrix_dim
;
2308 int window_change_flags
;
2311 if (!FRAME_LIVE_P (f
))
2314 top_window_y
= FRAME_TOP_MARGIN (f
);
2316 /* Allocate glyph pool structures if not already done. */
2317 if (f
->desired_pool
== NULL
)
2319 f
->desired_pool
= new_glyph_pool ();
2320 f
->current_pool
= new_glyph_pool ();
2323 /* Allocate frames matrix structures if needed. */
2324 if (f
->desired_matrix
== NULL
)
2326 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2327 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2330 /* Compute window glyph matrices. (This takes the mini-buffer
2331 window into account). The result is the size of the frame glyph
2332 matrix needed. The variable window_change_flags is set to a bit
2333 mask indicating whether new matrices will be allocated or
2334 existing matrices change their size or location within the frame
2336 window_change_flags
= 0;
2338 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2341 &window_change_flags
);
2343 /* Add in menu bar lines, if any. */
2344 matrix_dim
.height
+= top_window_y
;
2346 /* Enlarge pools as necessary. */
2347 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2348 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2350 /* Set up glyph pointers within window matrices. Do this only if
2351 absolutely necessary since it requires a frame redraw. */
2352 if (pool_changed_p
|| window_change_flags
)
2354 /* Do it for window matrices. */
2355 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2357 &window_change_flags
);
2359 /* Size of frame matrices must equal size of frame. Note
2360 that we are called for X frames with window widths NOT equal
2361 to the frame width (from CHANGE_FRAME_SIZE_1). */
2362 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2363 && matrix_dim
.height
== FRAME_LINES (f
));
2365 /* Pointers to glyph memory in glyph rows are exchanged during
2366 the update phase of redisplay, which means in general that a
2367 frame's current matrix consists of pointers into both the
2368 desired and current glyph pool of the frame. Adjusting a
2369 matrix sets the frame matrix up so that pointers are all into
2370 the same pool. If we want to preserve glyph contents of the
2371 current matrix over a call to adjust_glyph_matrix, we must
2372 make a copy of the current glyphs, and restore the current
2373 matrix' contents from that copy. */
2374 if (display_completed
2375 && !FRAME_GARBAGED_P (f
)
2376 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2377 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2378 /* For some reason, the frame glyph matrix gets corrupted if
2379 any of the windows contain margins. I haven't been able
2380 to hunt down the reason, but for the moment this prevents
2381 the problem from manifesting. -- cyd */
2382 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2384 struct glyph_matrix
*copy
= save_current_matrix (f
);
2385 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2386 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2387 restore_current_matrix (f
, copy
);
2388 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2392 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2393 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2394 SET_FRAME_GARBAGED (f
);
2400 /* Allocate/reallocate glyph matrices of a single frame F for
2401 window-based redisplay. */
2404 adjust_frame_glyphs_for_window_redisplay (f
)
2409 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2411 /* Allocate/reallocate window matrices. */
2412 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2414 #ifdef HAVE_X_WINDOWS
2415 /* Allocate/ reallocate matrices of the dummy window used to display
2416 the menu bar under X when no X toolkit support is available. */
2417 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2419 /* Allocate a dummy window if not already done. */
2420 if (NILP (f
->menu_bar_window
))
2422 f
->menu_bar_window
= make_window ();
2423 w
= XWINDOW (f
->menu_bar_window
);
2424 XSETFRAME (w
->frame
, f
);
2425 w
->pseudo_window_p
= 1;
2428 w
= XWINDOW (f
->menu_bar_window
);
2430 /* Set window dimensions to frame dimensions and allocate or
2431 adjust glyph matrices of W. */
2432 XSETFASTINT (w
->top_line
, 0);
2433 XSETFASTINT (w
->left_col
, 0);
2434 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2435 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2436 allocate_matrices_for_window_redisplay (w
);
2438 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2439 #endif /* HAVE_X_WINDOWS */
2442 /* Allocate/ reallocate matrices of the tool bar window. If we
2443 don't have a tool bar window yet, make one. */
2444 if (NILP (f
->tool_bar_window
))
2446 f
->tool_bar_window
= make_window ();
2447 w
= XWINDOW (f
->tool_bar_window
);
2448 XSETFRAME (w
->frame
, f
);
2449 w
->pseudo_window_p
= 1;
2452 w
= XWINDOW (f
->tool_bar_window
);
2454 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2455 XSETFASTINT (w
->left_col
, 0);
2456 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2457 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2458 allocate_matrices_for_window_redisplay (w
);
2463 /* Adjust/ allocate message buffer of frame F.
2465 Note that the message buffer is never freed. Since I could not
2466 find a free in 19.34, I assume that freeing it would be
2467 problematic in some way and don't do it either.
2469 (Implementation note: It should be checked if we can free it
2470 eventually without causing trouble). */
2473 adjust_frame_message_buffer (f
)
2476 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2478 if (FRAME_MESSAGE_BUF (f
))
2480 char *buffer
= FRAME_MESSAGE_BUF (f
);
2481 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2482 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2485 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2489 /* Re-allocate buffer for decode_mode_spec on frame F. */
2492 adjust_decode_mode_spec_buffer (f
)
2495 f
->decode_mode_spec_buffer
2496 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2497 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2502 /**********************************************************************
2503 Freeing Glyph Matrices
2504 **********************************************************************/
2506 /* Free glyph memory for a frame F. F may be null. This function can
2507 be called for the same frame more than once. The root window of
2508 F may be nil when this function is called. This is the case when
2509 the function is called when F is destroyed. */
2515 if (f
&& f
->glyphs_initialized_p
)
2517 /* Block interrupt input so that we don't get surprised by an X
2518 event while we're in an inconsistent state. */
2520 f
->glyphs_initialized_p
= 0;
2522 /* Release window sub-matrices. */
2523 if (!NILP (f
->root_window
))
2524 free_window_matrices (XWINDOW (f
->root_window
));
2526 /* Free the dummy window for menu bars without X toolkit and its
2528 if (!NILP (f
->menu_bar_window
))
2530 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2531 free_glyph_matrix (w
->desired_matrix
);
2532 free_glyph_matrix (w
->current_matrix
);
2533 w
->desired_matrix
= w
->current_matrix
= NULL
;
2534 f
->menu_bar_window
= Qnil
;
2537 /* Free the tool bar window and its glyph matrices. */
2538 if (!NILP (f
->tool_bar_window
))
2540 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2541 free_glyph_matrix (w
->desired_matrix
);
2542 free_glyph_matrix (w
->current_matrix
);
2543 w
->desired_matrix
= w
->current_matrix
= NULL
;
2544 f
->tool_bar_window
= Qnil
;
2547 /* Release frame glyph matrices. Reset fields to zero in
2548 case we are called a second time. */
2549 if (f
->desired_matrix
)
2551 free_glyph_matrix (f
->desired_matrix
);
2552 free_glyph_matrix (f
->current_matrix
);
2553 f
->desired_matrix
= f
->current_matrix
= NULL
;
2556 /* Release glyph pools. */
2557 if (f
->desired_pool
)
2559 free_glyph_pool (f
->desired_pool
);
2560 free_glyph_pool (f
->current_pool
);
2561 f
->desired_pool
= f
->current_pool
= NULL
;
2569 /* Free glyph sub-matrices in the window tree rooted at W. This
2570 function may be called with a null pointer, and it may be called on
2571 the same tree more than once. */
2574 free_window_matrices (w
)
2579 if (!NILP (w
->hchild
))
2580 free_window_matrices (XWINDOW (w
->hchild
));
2581 else if (!NILP (w
->vchild
))
2582 free_window_matrices (XWINDOW (w
->vchild
));
2585 /* This is a leaf window. Free its memory and reset fields
2586 to zero in case this function is called a second time for
2588 free_glyph_matrix (w
->current_matrix
);
2589 free_glyph_matrix (w
->desired_matrix
);
2590 w
->current_matrix
= w
->desired_matrix
= NULL
;
2593 /* Next window on same level. */
2594 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2599 /* Check glyph memory leaks. This function is called from
2600 shut_down_emacs. Note that frames are not destroyed when Emacs
2601 exits. We therefore free all glyph memory for all active frames
2602 explicitly and check that nothing is left allocated. */
2605 check_glyph_memory ()
2607 Lisp_Object tail
, frame
;
2609 /* Free glyph memory for all frames. */
2610 FOR_EACH_FRAME (tail
, frame
)
2611 free_glyphs (XFRAME (frame
));
2613 /* Check that nothing is left allocated. */
2614 if (glyph_matrix_count
)
2616 if (glyph_pool_count
)
2622 /**********************************************************************
2623 Building a Frame Matrix
2624 **********************************************************************/
2626 /* Most of the redisplay code works on glyph matrices attached to
2627 windows. This is a good solution most of the time, but it is not
2628 suitable for terminal code. Terminal output functions cannot rely
2629 on being able to set an arbitrary terminal window. Instead they
2630 must be provided with a view of the whole frame, i.e. the whole
2631 screen. We build such a view by constructing a frame matrix from
2632 window matrices in this section.
2634 Windows that must be updated have their must_be_update_p flag set.
2635 For all such windows, their desired matrix is made part of the
2636 desired frame matrix. For other windows, their current matrix is
2637 made part of the desired frame matrix.
2639 +-----------------+----------------+
2640 | desired | desired |
2642 +-----------------+----------------+
2645 +----------------------------------+
2647 Desired window matrices can be made part of the frame matrix in a
2648 cheap way: We exploit the fact that the desired frame matrix and
2649 desired window matrices share their glyph memory. This is not
2650 possible for current window matrices. Their glyphs are copied to
2651 the desired frame matrix. The latter is equivalent to
2652 preserve_other_columns in the old redisplay.
2654 Used glyphs counters for frame matrix rows are the result of adding
2655 up glyph lengths of the window matrices. A line in the frame
2656 matrix is enabled, if a corresponding line in a window matrix is
2659 After building the desired frame matrix, it will be passed to
2660 terminal code, which will manipulate both the desired and current
2661 frame matrix. Changes applied to the frame's current matrix have
2662 to be visible in current window matrices afterwards, of course.
2664 This problem is solved like this:
2666 1. Window and frame matrices share glyphs. Window matrices are
2667 constructed in a way that their glyph contents ARE the glyph
2668 contents needed in a frame matrix. Thus, any modification of
2669 glyphs done in terminal code will be reflected in window matrices
2672 2. Exchanges of rows in a frame matrix done by terminal code are
2673 intercepted by hook functions so that corresponding row operations
2674 on window matrices can be performed. This is necessary because we
2675 use pointers to glyphs in glyph row structures. To satisfy the
2676 assumption of point 1 above that glyphs are updated implicitly in
2677 window matrices when they are manipulated via the frame matrix,
2678 window and frame matrix must of course agree where to find the
2679 glyphs for their rows. Possible manipulations that must be
2680 mirrored are assignments of rows of the desired frame matrix to the
2681 current frame matrix and scrolling the current frame matrix. */
2683 /* Build frame F's desired matrix from window matrices. Only windows
2684 which have the flag must_be_updated_p set have to be updated. Menu
2685 bar lines of a frame are not covered by window matrices, so make
2686 sure not to touch them in this function. */
2689 build_frame_matrix (f
)
2694 /* F must have a frame matrix when this function is called. */
2695 xassert (!FRAME_WINDOW_P (f
));
2697 /* Clear all rows in the frame matrix covered by window matrices.
2698 Menu bar lines are not covered by windows. */
2699 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2700 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2702 /* Build the matrix by walking the window tree. */
2703 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2704 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2708 /* Walk a window tree, building a frame matrix MATRIX from window
2709 matrices. W is the root of a window tree. */
2712 build_frame_matrix_from_window_tree (matrix
, w
)
2713 struct glyph_matrix
*matrix
;
2718 if (!NILP (w
->hchild
))
2719 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2720 else if (!NILP (w
->vchild
))
2721 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2723 build_frame_matrix_from_leaf_window (matrix
, w
);
2725 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2730 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2731 desired frame matrix built. W is a leaf window whose desired or
2732 current matrix is to be added to FRAME_MATRIX. W's flag
2733 must_be_updated_p determines which matrix it contributes to
2734 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2735 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2736 Adding a desired matrix means setting up used counters and such in
2737 frame rows, while adding a current window matrix to FRAME_MATRIX
2738 means copying glyphs. The latter case corresponds to
2739 preserve_other_columns in the old redisplay. */
2742 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2743 struct glyph_matrix
*frame_matrix
;
2746 struct glyph_matrix
*window_matrix
;
2747 int window_y
, frame_y
;
2748 /* If non-zero, a glyph to insert at the right border of W. */
2749 GLYPH right_border_glyph
;
2751 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2753 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2754 if (w
->must_be_updated_p
)
2756 window_matrix
= w
->desired_matrix
;
2758 /* Decide whether we want to add a vertical border glyph. */
2759 if (!WINDOW_RIGHTMOST_P (w
))
2761 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2764 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2766 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2767 && GLYPH_CODE_CHAR_VALID_P (gc
))
2769 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2770 spec_glyph_lookup_face (w
, &right_border_glyph
);
2773 if (GLYPH_FACE (right_border_glyph
) <= 0)
2774 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2778 window_matrix
= w
->current_matrix
;
2780 /* For all rows in the window matrix and corresponding rows in the
2783 frame_y
= window_matrix
->matrix_y
;
2784 while (window_y
< window_matrix
->nrows
)
2786 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2787 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2788 int current_row_p
= window_matrix
== w
->current_matrix
;
2790 /* Fill up the frame row with spaces up to the left margin of the
2792 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2794 /* Fill up areas in the window matrix row with spaces. */
2795 fill_up_glyph_row_with_spaces (window_row
);
2797 /* If only part of W's desired matrix has been built, and
2798 window_row wasn't displayed, use the corresponding current
2800 if (window_matrix
== w
->desired_matrix
2801 && !window_row
->enabled_p
)
2803 window_row
= w
->current_matrix
->rows
+ window_y
;
2809 /* Copy window row to frame row. */
2810 bcopy (window_row
->glyphs
[0],
2811 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2812 window_matrix
->matrix_w
* sizeof (struct glyph
));
2816 xassert (window_row
->enabled_p
);
2818 /* Only when a desired row has been displayed, we want
2819 the corresponding frame row to be updated. */
2820 frame_row
->enabled_p
= 1;
2822 /* Maybe insert a vertical border between horizontally adjacent
2824 if (GLYPH_CHAR (right_border_glyph
) != 0)
2826 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2827 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2831 /* Window row window_y must be a slice of frame row
2833 xassert (glyph_row_slice_p (window_row
, frame_row
));
2835 /* If rows are in sync, we don't have to copy glyphs because
2836 frame and window share glyphs. */
2838 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2839 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2843 /* Set number of used glyphs in the frame matrix. Since we fill
2844 up with spaces, and visit leaf windows from left to right it
2845 can be done simply. */
2846 frame_row
->used
[TEXT_AREA
]
2847 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2855 /* Given a user-specified glyph, possibly including a Lisp-level face
2856 ID, return a glyph that has a realized face ID.
2857 This is used for glyphs displayed specially and not part of the text;
2858 for instance, vertical separators, truncation markers, etc. */
2861 spec_glyph_lookup_face (w
, glyph
)
2865 int lface_id
= GLYPH_FACE (*glyph
);
2866 /* Convert the glyph's specified face to a realized (cache) face. */
2869 int face_id
= merge_faces (XFRAME (w
->frame
),
2870 Qt
, lface_id
, DEFAULT_FACE_ID
);
2871 SET_GLYPH_FACE (*glyph
, face_id
);
2875 /* Add spaces to a glyph row ROW in a window matrix.
2877 Each row has the form:
2879 +---------+-----------------------------+------------+
2880 | left | text | right |
2881 +---------+-----------------------------+------------+
2883 Left and right marginal areas are optional. This function adds
2884 spaces to areas so that there are no empty holes between areas.
2885 In other words: If the right area is not empty, the text area
2886 is filled up with spaces up to the right area. If the text area
2887 is not empty, the left area is filled up.
2889 To be called for frame-based redisplay, only. */
2892 fill_up_glyph_row_with_spaces (row
)
2893 struct glyph_row
*row
;
2895 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2896 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2897 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2901 /* Fill area AREA of glyph row ROW with spaces. To be called for
2902 frame-based redisplay only. */
2905 fill_up_glyph_row_area_with_spaces (row
, area
)
2906 struct glyph_row
*row
;
2909 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2911 struct glyph
*end
= row
->glyphs
[area
+ 1];
2912 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2915 *text
++ = space_glyph
;
2916 row
->used
[area
] = text
- row
->glyphs
[area
];
2921 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2922 reached. In frame matrices only one area, TEXT_AREA, is used. */
2925 fill_up_frame_row_with_spaces (row
, upto
)
2926 struct glyph_row
*row
;
2929 int i
= row
->used
[TEXT_AREA
];
2930 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2933 glyph
[i
++] = space_glyph
;
2935 row
->used
[TEXT_AREA
] = i
;
2940 /**********************************************************************
2941 Mirroring operations on frame matrices in window matrices
2942 **********************************************************************/
2944 /* Set frame being updated via frame-based redisplay to F. This
2945 function must be called before updates to make explicit that we are
2946 working on frame matrices or not. */
2949 set_frame_matrix_frame (f
)
2952 frame_matrix_frame
= f
;
2956 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2957 DESIRED_MATRIX is the desired matrix corresponding to
2958 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2959 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2960 frame_matrix_frame is non-null, this indicates that the exchange is
2961 done in frame matrices, and that we have to perform analogous
2962 operations in window matrices of frame_matrix_frame. */
2965 make_current (desired_matrix
, current_matrix
, row
)
2966 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2969 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2970 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2971 int mouse_face_p
= current_row
->mouse_face_p
;
2973 /* Do current_row = desired_row. This exchanges glyph pointers
2974 between both rows, and does a structure assignment otherwise. */
2975 assign_row (current_row
, desired_row
);
2977 /* Enable current_row to mark it as valid. */
2978 current_row
->enabled_p
= 1;
2979 current_row
->mouse_face_p
= mouse_face_p
;
2981 /* If we are called on frame matrices, perform analogous operations
2982 for window matrices. */
2983 if (frame_matrix_frame
)
2984 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2988 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2989 W's frame which has been made current (by swapping pointers between
2990 current and desired matrix). Perform analogous operations in the
2991 matrices of leaf windows in the window tree rooted at W. */
2994 mirror_make_current (w
, frame_row
)
3000 if (!NILP (w
->hchild
))
3001 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
3002 else if (!NILP (w
->vchild
))
3003 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3006 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3007 here because the checks performed in debug mode there
3008 will not allow the conversion. */
3009 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3011 /* If FRAME_ROW is within W, assign the desired row to the
3012 current row (exchanging glyph pointers). */
3013 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3015 struct glyph_row
*current_row
3016 = MATRIX_ROW (w
->current_matrix
, row
);
3017 struct glyph_row
*desired_row
3018 = MATRIX_ROW (w
->desired_matrix
, row
);
3020 if (desired_row
->enabled_p
)
3021 assign_row (current_row
, desired_row
);
3023 swap_glyph_pointers (desired_row
, current_row
);
3024 current_row
->enabled_p
= 1;
3028 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3033 /* Perform row dance after scrolling. We are working on the range of
3034 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3035 including) in MATRIX. COPY_FROM is a vector containing, for each
3036 row I in the range 0 <= I < NLINES, the index of the original line
3037 to move to I. This index is relative to the row range, i.e. 0 <=
3038 index < NLINES. RETAINED_P is a vector containing zero for each
3039 row 0 <= I < NLINES which is empty.
3041 This function is called from do_scrolling and do_direct_scrolling. */
3044 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3046 struct glyph_matrix
*matrix
;
3047 int unchanged_at_top
, nlines
;
3051 /* A copy of original rows. */
3052 struct glyph_row
*old_rows
;
3054 /* Rows to assign to. */
3055 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3059 /* Make a copy of the original rows. */
3060 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3061 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3063 /* Assign new rows, maybe clear lines. */
3064 for (i
= 0; i
< nlines
; ++i
)
3066 int enabled_before_p
= new_rows
[i
].enabled_p
;
3068 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3069 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3070 new_rows
[i
] = old_rows
[copy_from
[i
]];
3071 new_rows
[i
].enabled_p
= enabled_before_p
;
3073 /* RETAINED_P is zero for empty lines. */
3074 if (!retained_p
[copy_from
[i
]])
3075 new_rows
[i
].enabled_p
= 0;
3078 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3079 if (frame_matrix_frame
)
3080 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3081 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3085 /* Synchronize glyph pointers in the current matrix of window W with
3086 the current frame matrix. */
3089 sync_window_with_frame_matrix_rows (w
)
3092 struct frame
*f
= XFRAME (w
->frame
);
3093 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3094 int left
, right
, x
, width
;
3096 /* Preconditions: W must be a leaf window on a tty frame. */
3097 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3098 xassert (!FRAME_WINDOW_P (f
));
3100 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3101 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3102 x
= w
->current_matrix
->matrix_x
;
3103 width
= w
->current_matrix
->matrix_w
;
3105 window_row
= w
->current_matrix
->rows
;
3106 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3107 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3109 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3111 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3112 = frame_row
->glyphs
[0] + x
;
3113 window_row
->glyphs
[TEXT_AREA
]
3114 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3115 window_row
->glyphs
[LAST_AREA
]
3116 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3117 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3118 = window_row
->glyphs
[LAST_AREA
] - right
;
3123 /* Return the window in the window tree rooted in W containing frame
3124 row ROW. Value is null if none is found. */
3127 frame_row_to_window (w
, row
)
3131 struct window
*found
= NULL
;
3135 if (!NILP (w
->hchild
))
3136 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3137 else if (!NILP (w
->vchild
))
3138 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3139 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3140 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3143 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3150 /* Perform a line dance in the window tree rooted at W, after
3151 scrolling a frame matrix in mirrored_line_dance.
3153 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3154 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3155 COPY_FROM is a vector containing, for each row I in the range 0 <=
3156 I < NLINES, the index of the original line to move to I. This
3157 index is relative to the row range, i.e. 0 <= index < NLINES.
3158 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3162 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3164 int unchanged_at_top
, nlines
;
3170 if (!NILP (w
->hchild
))
3171 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3172 nlines
, copy_from
, retained_p
);
3173 else if (!NILP (w
->vchild
))
3174 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3175 nlines
, copy_from
, retained_p
);
3178 /* W is a leaf window, and we are working on its current
3180 struct glyph_matrix
*m
= w
->current_matrix
;
3182 struct glyph_row
*old_rows
;
3184 /* Make a copy of the original rows of matrix m. */
3185 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3186 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3188 for (i
= 0; i
< nlines
; ++i
)
3190 /* Frame relative line assigned to. */
3191 int frame_to
= i
+ unchanged_at_top
;
3193 /* Frame relative line assigned. */
3194 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3196 /* Window relative line assigned to. */
3197 int window_to
= frame_to
- m
->matrix_y
;
3199 /* Window relative line assigned. */
3200 int window_from
= frame_from
- m
->matrix_y
;
3202 /* Is assigned line inside window? */
3203 int from_inside_window_p
3204 = window_from
>= 0 && window_from
< m
->matrix_h
;
3206 /* Is assigned to line inside window? */
3207 int to_inside_window_p
3208 = window_to
>= 0 && window_to
< m
->matrix_h
;
3210 if (from_inside_window_p
&& to_inside_window_p
)
3212 /* Enabled setting before assignment. */
3213 int enabled_before_p
;
3215 /* Do the assignment. The enabled_p flag is saved
3216 over the assignment because the old redisplay did
3218 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3219 m
->rows
[window_to
] = old_rows
[window_from
];
3220 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3222 /* If frame line is empty, window line is empty, too. */
3223 if (!retained_p
[copy_from
[i
]])
3224 m
->rows
[window_to
].enabled_p
= 0;
3226 else if (to_inside_window_p
)
3228 /* A copy between windows. This is an infrequent
3229 case not worth optimizing. */
3230 struct frame
*f
= XFRAME (w
->frame
);
3231 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3233 struct glyph_matrix
*m2
;
3236 w2
= frame_row_to_window (root
, frame_from
);
3237 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3238 -nw', FROM_FRAME sometimes has no associated window.
3239 This check avoids a segfault if W2 is null. */
3242 m2
= w2
->current_matrix
;
3243 m2_from
= frame_from
- m2
->matrix_y
;
3244 copy_row_except_pointers (m
->rows
+ window_to
,
3245 m2
->rows
+ m2_from
);
3247 /* If frame line is empty, window line is empty, too. */
3248 if (!retained_p
[copy_from
[i
]])
3249 m
->rows
[window_to
].enabled_p
= 0;
3253 else if (from_inside_window_p
)
3257 /* If there was a copy between windows, make sure glyph
3258 pointers are in sync with the frame matrix. */
3260 sync_window_with_frame_matrix_rows (w
);
3262 /* Check that no pointers are lost. */
3266 /* Next window on same level. */
3267 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3274 /* Check that window and frame matrices agree about their
3275 understanding where glyphs of the rows are to find. For each
3276 window in the window tree rooted at W, check that rows in the
3277 matrices of leaf window agree with their frame matrices about
3281 check_window_matrix_pointers (w
)
3286 if (!NILP (w
->hchild
))
3287 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3288 else if (!NILP (w
->vchild
))
3289 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3292 struct frame
*f
= XFRAME (w
->frame
);
3293 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3294 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3297 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3302 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3303 a window and FRAME_MATRIX is the corresponding frame matrix. For
3304 each row in WINDOW_MATRIX check that it's a slice of the
3305 corresponding frame row. If it isn't, abort. */
3308 check_matrix_pointers (window_matrix
, frame_matrix
)
3309 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3311 /* Row number in WINDOW_MATRIX. */
3314 /* Row number corresponding to I in FRAME_MATRIX. */
3315 int j
= window_matrix
->matrix_y
;
3317 /* For all rows check that the row in the window matrix is a
3318 slice of the row in the frame matrix. If it isn't we didn't
3319 mirror an operation on the frame matrix correctly. */
3320 while (i
< window_matrix
->nrows
)
3322 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3323 frame_matrix
->rows
+ j
))
3329 #endif /* GLYPH_DEBUG != 0 */
3333 /**********************************************************************
3334 VPOS and HPOS translations
3335 **********************************************************************/
3339 /* Translate vertical position VPOS which is relative to window W to a
3340 vertical position relative to W's frame. */
3343 window_to_frame_vpos (w
, vpos
)
3347 struct frame
*f
= XFRAME (w
->frame
);
3349 xassert (!FRAME_WINDOW_P (f
));
3350 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3351 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3352 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3357 /* Translate horizontal position HPOS which is relative to window W to
3358 a horizontal position relative to W's frame. */
3361 window_to_frame_hpos (w
, hpos
)
3365 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3366 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3370 #endif /* GLYPH_DEBUG */
3374 /**********************************************************************
3376 **********************************************************************/
3378 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3379 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3385 CHECK_LIVE_FRAME (frame
);
3388 /* Ignore redraw requests, if frame has no glyphs yet.
3389 (Implementation note: It still has to be checked why we are
3390 called so early here). */
3391 if (!glyphs_initialized_initially_p
)
3396 if (FRAME_MSDOS_P (f
))
3397 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3400 clear_current_matrices (f
);
3402 if (FRAME_TERMCAP_P (f
))
3403 fflush (FRAME_TTY (f
)->output
);
3404 windows_or_buffers_changed
++;
3405 /* Mark all windows as inaccurate, so that every window will have
3406 its redisplay done. */
3407 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3408 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3414 /* Redraw frame F. This is nothing more than a call to the Lisp
3415 function redraw-frame. */
3422 XSETFRAME (frame
, f
);
3423 Fredraw_frame (frame
);
3427 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3428 doc
: /* Clear and redisplay all visible frames. */)
3431 Lisp_Object tail
, frame
;
3433 FOR_EACH_FRAME (tail
, frame
)
3434 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3435 Fredraw_frame (frame
);
3441 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3442 visible frames marked as garbaged. */
3445 redraw_garbaged_frames ()
3447 Lisp_Object tail
, frame
;
3449 FOR_EACH_FRAME (tail
, frame
)
3450 if (FRAME_VISIBLE_P (XFRAME (frame
))
3451 && FRAME_GARBAGED_P (XFRAME (frame
)))
3452 Fredraw_frame (frame
);
3457 /***********************************************************************
3459 ***********************************************************************/
3461 /* Try to update display and current glyph matrix directly.
3463 This function is called after a character G has been inserted into
3464 current_buffer. It tries to update the current glyph matrix and
3465 perform appropriate screen output to reflect the insertion. If it
3466 succeeds, the global flag redisplay_performed_directly_p will be
3467 set to 1, and thereby prevent the more costly general redisplay
3468 from running (see redisplay_internal).
3470 This function is not called for `hairy' character insertions.
3471 In particular, it is not called when after or before change
3472 functions exist, like they are used by font-lock. See keyboard.c
3473 for details where this function is called. */
3476 direct_output_for_insert (g
)
3479 register struct frame
*f
= SELECTED_FRAME ();
3480 struct window
*w
= XWINDOW (selected_window
);
3482 struct glyph_row
*glyph_row
;
3483 struct glyph
*glyphs
, *glyph
, *end
;
3485 /* Non-null means that redisplay of W is based on window matrices. */
3486 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3487 /* Non-null means we are in overwrite mode. */
3488 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3490 struct text_pos pos
;
3491 int delta
, delta_bytes
;
3493 /* Not done directly. */
3494 redisplay_performed_directly_p
= 0;
3496 /* Quickly give up for some common cases. */
3497 if (cursor_in_echo_area
3498 /* Give up if fonts have changed. */
3500 /* Give up if face attributes have been changed. */
3501 || face_change_count
3502 /* Give up if cursor position not really known. */
3503 || !display_completed
3504 /* Give up if buffer appears in two places. */
3505 || buffer_shared
> 1
3506 /* Give up if we need to reorder bidirectional text. */
3507 || !NILP (current_buffer
->bidi_display_reordering
)
3508 /* Give up if currently displaying a message instead of the
3509 minibuffer contents. */
3510 || (EQ (selected_window
, minibuf_window
)
3511 && EQ (minibuf_window
, echo_area_window
))
3512 /* Give up for hscrolled mini-buffer because display of the prompt
3513 is handled specially there (see display_line). */
3514 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3515 /* Give up if overwriting in the middle of a line. */
3518 && FETCH_BYTE (PT
) != '\n')
3519 /* Give up for tabs and line ends. */
3523 || (g
== ' ' && !NILP (current_buffer
->word_wrap
))
3524 /* Give up if unable to display the cursor in the window. */
3525 || w
->cursor
.vpos
< 0
3526 /* Give up if we are showing a message or just cleared the message
3527 because we might need to resize the echo area window. */
3528 || !NILP (echo_area_buffer
[0])
3529 || !NILP (echo_area_buffer
[1])
3530 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3531 /* Can't do it in a continued line because continuation
3532 lines would change. */
3533 (glyph_row
->continued_p
3534 || glyph_row
->exact_window_width_line_p
3535 /* Can't use this method if the line overlaps others or is
3536 overlapped by others because these other lines would
3537 have to be redisplayed. */
3538 || glyph_row
->overlapping_p
3539 || glyph_row
->overlapped_p
))
3540 /* Can't do it for partial width windows on terminal frames
3541 because we can't clear to eol in such a window. */
3542 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3545 /* If we can't insert glyphs, we can use this method only
3546 at the end of a line. */
3547 if (!FRAME_CHAR_INS_DEL_OK (f
))
3548 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3551 /* Set up a display iterator structure for W. Glyphs will be
3552 produced in scratch_glyph_row. Current position is W's cursor
3554 clear_glyph_row (&scratch_glyph_row
);
3555 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3556 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3557 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3560 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3561 if (glyph_row
->mouse_face_p
)
3564 /* Give up if highlighting trailing whitespace and we have trailing
3565 whitespace in glyph_row. We would have to remove the trailing
3566 whitespace face in that case. */
3567 if (!NILP (Vshow_trailing_whitespace
)
3568 && glyph_row
->used
[TEXT_AREA
])
3572 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3573 if (last
->type
== STRETCH_GLYPH
3574 || (last
->type
== CHAR_GLYPH
3575 && last
->u
.ch
== ' '))
3579 /* Give up if there are overlay strings at pos. This would fail
3580 if the overlay string has newlines in it. */
3581 if (STRINGP (it
.string
))
3584 it
.hpos
= w
->cursor
.hpos
;
3585 it
.vpos
= w
->cursor
.vpos
;
3586 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3587 it
.current_y
= w
->cursor
.y
;
3588 it
.end_charpos
= PT
;
3589 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3590 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3592 /* More than one display element may be returned for PT - 1 if
3593 (i) it's a control character which is translated into `\003' or
3594 `^C', or (ii) it has a display table entry, or (iii) it's a
3595 combination of both. */
3596 delta
= delta_bytes
= 0;
3597 while (get_next_display_element (&it
))
3599 PRODUCE_GLYPHS (&it
);
3601 /* Give up if glyph doesn't fit completely on the line. */
3602 if (it
.current_x
>= it
.last_visible_x
)
3605 /* Give up if new glyph has different ascent or descent than
3606 the original row, or if it is not a character glyph. */
3607 if (glyph_row
->ascent
!= it
.ascent
3608 || glyph_row
->height
!= it
.ascent
+ it
.descent
3609 || glyph_row
->phys_ascent
!= it
.phys_ascent
3610 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3611 || it
.what
!= IT_CHARACTER
)
3615 delta_bytes
+= it
.len
;
3616 set_iterator_to_next (&it
, 1);
3619 /* Give up if we hit the right edge of the window. We would have
3620 to insert truncation or continuation glyphs. */
3621 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3622 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3625 /* Give up if there is a \t following in the line. */
3627 it2
.end_charpos
= ZV
;
3628 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3629 while (get_next_display_element (&it2
)
3630 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3634 set_iterator_to_next (&it2
, 1);
3637 /* Number of new glyphs produced. */
3638 n
= it
.glyph_row
->used
[TEXT_AREA
];
3640 /* Start and end of glyphs in original row. */
3641 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3642 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3644 /* Make room for new glyphs, then insert them. */
3645 xassert (end
- glyphs
- n
>= 0);
3646 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3647 (end
- glyphs
- n
) * sizeof (*end
));
3648 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3649 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3650 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3652 /* Compute new line width. */
3653 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3654 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3655 glyph_row
->pixel_width
= glyph_row
->x
;
3658 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3662 /* Increment buffer positions for glyphs following the newly
3664 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3665 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3666 glyph
->charpos
+= delta
;
3668 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3670 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3671 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3674 /* Adjust positions in lines following the one we are in. */
3675 increment_matrix_positions (w
->current_matrix
,
3677 w
->current_matrix
->nrows
,
3678 delta
, delta_bytes
);
3680 glyph_row
->contains_overlapping_glyphs_p
3681 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3683 glyph_row
->displays_text_p
= 1;
3684 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3685 XFASTINT (w
->window_end_vpos
)));
3687 if (!NILP (Vshow_trailing_whitespace
))
3688 highlight_trailing_whitespace (it
.f
, glyph_row
);
3690 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3691 In the middle, we have to insert glyphs. Note that this is now
3692 implemented for X frames. The implementation uses updated_window
3694 updated_row
= glyph_row
;
3695 updated_area
= TEXT_AREA
;
3699 FRAME_RIF (f
)->update_window_begin_hook (w
);
3701 if (glyphs
== end
- n
3702 /* In front of a space added by append_space. */
3703 || (glyphs
== end
- n
- 1
3704 && (end
- n
)->charpos
<= 0))
3705 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3707 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3711 if (glyphs
== end
- n
)
3712 write_glyphs (f
, glyphs
, n
);
3714 insert_glyphs (f
, glyphs
, n
);
3717 w
->cursor
.hpos
+= n
;
3718 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3719 xassert (w
->cursor
.hpos
>= 0
3720 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3722 /* How to set the cursor differs depending on whether we are
3723 using a frame matrix or a window matrix. Note that when
3724 a frame matrix is used, cursor_to expects frame coordinates,
3725 and the X and Y parameters are not used. */
3726 if (window_redisplay_p
)
3727 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3728 w
->cursor
.y
, w
->cursor
.x
);
3732 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3733 + (INTEGERP (w
->left_margin_cols
)
3734 ? XFASTINT (w
->left_margin_cols
)
3736 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3737 cursor_to (f
, y
, x
);
3740 #ifdef HAVE_WINDOW_SYSTEM
3741 update_window_fringes (w
, 0);
3745 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3748 if (FRAME_TERMCAP_P (f
))
3749 fflush (FRAME_TTY (f
)->output
);
3751 TRACE ((stderr
, "direct output for insert\n"));
3752 mark_window_display_accurate (it
.window
, 1);
3753 redisplay_performed_directly_p
= 1;
3758 /* Perform a direct display update for moving PT by N positions
3759 left or right. N < 0 means a movement backwards. This function
3760 is currently only called for N == 1 or N == -1. */
3763 direct_output_forward_char (n
)
3766 struct frame
*f
= SELECTED_FRAME ();
3767 struct window
*w
= XWINDOW (selected_window
);
3768 struct glyph_row
*row
;
3770 /* Give up if point moved out of or into a composition. */
3771 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3772 current_buffer
, PT
))
3775 /* Give up if face attributes have been changed. */
3776 if (face_change_count
)
3779 /* Give up if current matrix is not up to date or we are
3780 displaying a message. */
3781 if (!display_completed
|| cursor_in_echo_area
)
3784 /* Give up if we need to reorder bidirectional text. */
3785 if (!NILP (XBUFFER (w
->buffer
)->bidi_display_reordering
))
3788 /* Give up if the buffer's direction is reversed. */
3789 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3792 /* Can't use direct output if highlighting a region. */
3793 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3796 /* Can't use direct output if highlighting trailing whitespace. */
3797 if (!NILP (Vshow_trailing_whitespace
))
3800 /* Give up if we are showing a message or just cleared the message
3801 because we might need to resize the echo area window. */
3802 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3805 /* Give up if currently displaying a message instead of the
3806 minibuffer contents. */
3807 if (XWINDOW (minibuf_window
) == w
3808 && EQ (minibuf_window
, echo_area_window
))
3811 /* Give up if we don't know where the cursor is. */
3812 if (w
->cursor
.vpos
< 0)
3815 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3817 /* Give up if PT is outside of the last known cursor row. */
3818 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3819 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3822 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3824 w
->last_cursor
= w
->cursor
;
3825 XSETFASTINT (w
->last_point
, PT
);
3827 xassert (w
->cursor
.hpos
>= 0
3828 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3830 if (FRAME_WINDOW_P (f
))
3831 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3832 w
->cursor
.y
, w
->cursor
.x
);
3836 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3837 + (INTEGERP (w
->left_margin_cols
)
3838 ? XFASTINT (w
->left_margin_cols
)
3840 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3841 cursor_to (f
, y
, x
);
3844 if (FRAME_TERMCAP_P (f
))
3845 fflush (FRAME_TTY (f
)->output
);
3846 redisplay_performed_directly_p
= 1;
3852 /***********************************************************************
3854 ***********************************************************************/
3856 /* Update frame F based on the data in desired matrices.
3858 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3859 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3862 Value is non-zero if redisplay was stopped due to pending input. */
3865 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3868 int inhibit_hairy_id_p
;
3870 /* 1 means display has been paused because of pending input. */
3872 struct window
*root_window
= XWINDOW (f
->root_window
);
3874 if (redisplay_dont_pause
)
3876 #if PERIODIC_PREEMPTION_CHECKING
3877 else if (NILP (Vredisplay_preemption_period
))
3879 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3882 double p
= XFLOATINT (Vredisplay_preemption_period
);
3885 if (detect_input_pending_ignore_squeezables ())
3892 usec
= (p
- sec
) * 1000000;
3894 EMACS_GET_TIME (tm
);
3895 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3896 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3900 if (FRAME_WINDOW_P (f
))
3902 /* We are working on window matrix basis. All windows whose
3903 flag must_be_updated_p is set have to be updated. */
3905 /* Record that we are not working on frame matrices. */
3906 set_frame_matrix_frame (NULL
);
3908 /* Update all windows in the window tree of F, maybe stopping
3909 when pending input is detected. */
3912 /* Update the menu bar on X frames that don't have toolkit
3914 if (WINDOWP (f
->menu_bar_window
))
3915 update_window (XWINDOW (f
->menu_bar_window
), 1);
3917 /* Update the tool-bar window, if present. */
3918 if (WINDOWP (f
->tool_bar_window
))
3920 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3922 /* Update tool-bar window. */
3923 if (w
->must_be_updated_p
)
3927 update_window (w
, 1);
3928 w
->must_be_updated_p
= 0;
3930 /* Swap tool-bar strings. We swap because we want to
3932 tem
= f
->current_tool_bar_string
;
3933 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3934 f
->desired_tool_bar_string
= tem
;
3939 /* Update windows. */
3940 paused_p
= update_window_tree (root_window
, force_p
);
3943 /* This flush is a performance bottleneck under X,
3944 and it doesn't seem to be necessary anyway (in general).
3945 It is necessary when resizing the window with the mouse, or
3946 at least the fringes are not redrawn in a timely manner. ++kfs */
3947 if (f
->force_flush_display_p
)
3949 FRAME_RIF (f
)->flush_display (f
);
3950 f
->force_flush_display_p
= 0;
3955 /* We are working on frame matrix basis. Set the frame on whose
3956 frame matrix we operate. */
3957 set_frame_matrix_frame (f
);
3959 /* Build F's desired matrix from window matrices. */
3960 build_frame_matrix (f
);
3962 /* Update the display */
3964 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3967 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3969 if (FRAME_TTY (f
)->termscript
)
3970 fflush (FRAME_TTY (f
)->termscript
);
3971 if (FRAME_TERMCAP_P (f
))
3972 fflush (FRAME_TTY (f
)->output
);
3975 /* Check window matrices for lost pointers. */
3977 check_window_matrix_pointers (root_window
);
3978 add_frame_display_history (f
, paused_p
);
3983 /* Reset flags indicating that a window should be updated. */
3984 set_window_update_flags (root_window
, 0);
3986 display_completed
= !paused_p
;
3992 /************************************************************************
3993 Window-based updates
3994 ************************************************************************/
3996 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3997 don't stop updating when input is pending. */
4000 update_window_tree (w
, force_p
)
4006 while (w
&& !paused_p
)
4008 if (!NILP (w
->hchild
))
4009 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
4010 else if (!NILP (w
->vchild
))
4011 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
4012 else if (w
->must_be_updated_p
)
4013 paused_p
|= update_window (w
, force_p
);
4015 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4022 /* Update window W if its flag must_be_updated_p is non-zero. If
4023 FORCE_P is non-zero, don't stop updating if input is pending. */
4026 update_single_window (w
, force_p
)
4030 if (w
->must_be_updated_p
)
4032 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4034 /* Record that this is not a frame-based redisplay. */
4035 set_frame_matrix_frame (NULL
);
4037 if (redisplay_dont_pause
)
4039 #if PERIODIC_PREEMPTION_CHECKING
4040 else if (NILP (Vredisplay_preemption_period
))
4042 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4045 double p
= XFLOATINT (Vredisplay_preemption_period
);
4049 usec
= (p
- sec
) * 1000000;
4051 EMACS_GET_TIME (tm
);
4052 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4053 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4059 update_window (w
, force_p
);
4062 /* Reset flag in W. */
4063 w
->must_be_updated_p
= 0;
4067 #ifdef HAVE_WINDOW_SYSTEM
4069 /* Redraw lines from the current matrix of window W that are
4070 overlapped by other rows. YB is bottom-most y-position in W. */
4073 redraw_overlapped_rows (w
, yb
)
4078 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4080 /* If rows overlapping others have been changed, the rows being
4081 overlapped have to be redrawn. This won't draw lines that have
4082 already been drawn in update_window_line because overlapped_p in
4083 desired rows is 0, so after row assignment overlapped_p in
4084 current rows is 0. */
4085 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4087 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4089 if (!row
->enabled_p
)
4091 else if (row
->mode_line_p
)
4094 if (row
->overlapped_p
)
4096 enum glyph_row_area area
;
4098 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4101 updated_area
= area
;
4102 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
4103 area
== TEXT_AREA
? row
->x
: 0);
4104 if (row
->used
[area
])
4105 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4107 FRAME_RIF (f
)->clear_end_of_line (-1);
4110 row
->overlapped_p
= 0;
4113 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4119 /* Redraw lines from the current matrix of window W that overlap
4120 others. YB is bottom-most y-position in W. */
4123 redraw_overlapping_rows (w
, yb
)
4128 struct glyph_row
*row
;
4129 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4131 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4133 row
= w
->current_matrix
->rows
+ i
;
4135 if (!row
->enabled_p
)
4137 else if (row
->mode_line_p
)
4140 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4142 if (row
->overlapping_p
)
4146 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
4147 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4148 overlaps
|= OVERLAPS_PRED
;
4149 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
4150 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4151 overlaps
|= OVERLAPS_SUCC
;
4155 if (row
->used
[LEFT_MARGIN_AREA
])
4156 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4158 if (row
->used
[TEXT_AREA
])
4159 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4161 if (row
->used
[RIGHT_MARGIN_AREA
])
4162 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4164 /* Record in neighbour rows that ROW overwrites part of
4166 if (overlaps
& OVERLAPS_PRED
)
4167 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4168 if (overlaps
& OVERLAPS_SUCC
)
4169 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4178 #endif /* HAVE_WINDOW_SYSTEM */
4183 /* Check that no row in the current matrix of window W is enabled
4184 which is below what's displayed in the window. */
4187 check_current_matrix_flags (w
)
4190 int last_seen_p
= 0;
4191 int i
, yb
= window_text_bottom_y (w
);
4193 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4195 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4196 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4198 else if (last_seen_p
&& row
->enabled_p
)
4203 #endif /* GLYPH_DEBUG */
4206 /* Update display of window W. FORCE_P non-zero means that we should
4207 not stop when detecting pending input. */
4210 update_window (w
, force_p
)
4214 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4216 #if !PERIODIC_PREEMPTION_CHECKING
4217 int preempt_count
= baud_rate
/ 2400 + 1;
4219 extern int input_pending
;
4220 extern Lisp_Object do_mouse_tracking
;
4221 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4223 /* Check that W's frame doesn't have glyph matrices. */
4224 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4227 /* Check pending input the first time so that we can quickly return. */
4228 #if !PERIODIC_PREEMPTION_CHECKING
4230 detect_input_pending_ignore_squeezables ();
4233 /* If forced to complete the update, or if no input is pending, do
4235 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4237 struct glyph_row
*row
, *end
;
4238 struct glyph_row
*mode_line_row
;
4239 struct glyph_row
*header_line_row
;
4240 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4242 rif
->update_window_begin_hook (w
);
4243 yb
= window_text_bottom_y (w
);
4245 /* If window has a header line, update it before everything else.
4246 Adjust y-positions of other rows by the header line height. */
4247 row
= desired_matrix
->rows
;
4248 end
= row
+ desired_matrix
->nrows
- 1;
4250 if (row
->mode_line_p
)
4252 header_line_row
= row
;
4256 header_line_row
= NULL
;
4258 /* Update the mode line, if necessary. */
4259 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4260 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4262 mode_line_row
->y
= yb
;
4263 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4265 &mouse_face_overwritten_p
);
4268 /* Find first enabled row. Optimizations in redisplay_internal
4269 may lead to an update with only one row enabled. There may
4270 be also completely empty matrices. */
4271 while (row
< end
&& !row
->enabled_p
)
4274 /* Try reusing part of the display by copying. */
4275 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4277 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4280 /* All rows were found to be equal. */
4286 /* We've scrolled the display. */
4292 /* Update the rest of the lines. */
4293 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4296 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4299 /* We'll have to play a little bit with when to
4300 detect_input_pending. If it's done too often,
4301 scrolling large windows with repeated scroll-up
4302 commands will too quickly pause redisplay. */
4303 #if PERIODIC_PREEMPTION_CHECKING
4307 EMACS_GET_TIME (tm
);
4308 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4309 if (EMACS_TIME_NEG_P (dif
))
4311 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4312 if (detect_input_pending_ignore_squeezables ())
4317 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4318 detect_input_pending_ignore_squeezables ();
4320 changed_p
|= update_window_line (w
, vpos
,
4321 &mouse_face_overwritten_p
);
4323 /* Mark all rows below the last visible one in the current
4324 matrix as invalid. This is necessary because of
4325 variable line heights. Consider the case of three
4326 successive redisplays, where the first displays 5
4327 lines, the second 3 lines, and the third 5 lines again.
4328 If the second redisplay wouldn't mark rows in the
4329 current matrix invalid, the third redisplay might be
4330 tempted to optimize redisplay based on lines displayed
4331 in the first redisplay. */
4332 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4333 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4334 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4337 /* Was display preempted? */
4338 paused_p
= row
< end
;
4342 /* Update the header line after scrolling because a new header
4343 line would otherwise overwrite lines at the top of the window
4344 that can be scrolled. */
4345 if (header_line_row
&& header_line_row
->enabled_p
)
4347 header_line_row
->y
= 0;
4348 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4351 /* Fix the appearance of overlapping/overlapped rows. */
4352 if (!paused_p
&& !w
->pseudo_window_p
)
4354 #ifdef HAVE_WINDOW_SYSTEM
4355 if (changed_p
&& rif
->fix_overlapping_area
)
4357 redraw_overlapped_rows (w
, yb
);
4358 redraw_overlapping_rows (w
, yb
);
4362 /* Make cursor visible at cursor position of W. */
4363 set_window_cursor_after_update (w
);
4365 #if 0 /* Check that current matrix invariants are satisfied. This is
4366 for debugging only. See the comment of check_matrix_invariants. */
4367 IF_DEBUG (check_matrix_invariants (w
));
4372 /* Remember the redisplay method used to display the matrix. */
4373 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4376 #ifdef HAVE_WINDOW_SYSTEM
4377 update_window_fringes (w
, 0);
4380 /* End the update of window W. Don't set the cursor if we
4381 paused updating the display because in this case,
4382 set_window_cursor_after_update hasn't been called, and
4383 output_cursor doesn't contain the cursor location. */
4384 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4390 /* check_current_matrix_flags (w); */
4391 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4394 clear_glyph_matrix (desired_matrix
);
4400 /* Update the display of area AREA in window W, row number VPOS.
4401 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4404 update_marginal_area (w
, area
, vpos
)
4408 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4409 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4411 /* Let functions in xterm.c know what area subsequent X positions
4412 will be relative to. */
4413 updated_area
= area
;
4415 /* Set cursor to start of glyphs, write them, and clear to the end
4416 of the area. I don't think that something more sophisticated is
4417 necessary here, since marginal areas will not be the default. */
4418 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4419 if (desired_row
->used
[area
])
4420 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4421 rif
->clear_end_of_line (-1);
4425 /* Update the display of the text area of row VPOS in window W.
4426 Value is non-zero if display has changed. */
4429 update_text_area (w
, vpos
)
4433 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4434 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4435 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4438 /* Let functions in xterm.c know what area subsequent X positions
4439 will be relative to. */
4440 updated_area
= TEXT_AREA
;
4442 /* If rows are at different X or Y, or rows have different height,
4443 or the current row is marked invalid, write the entire line. */
4444 if (!current_row
->enabled_p
4445 || desired_row
->y
!= current_row
->y
4446 || desired_row
->ascent
!= current_row
->ascent
4447 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4448 || desired_row
->phys_height
!= current_row
->phys_height
4449 || desired_row
->visible_height
!= current_row
->visible_height
4450 || current_row
->overlapped_p
4451 /* This next line is necessary for correctly redrawing
4452 mouse-face areas after scrolling and other operations.
4453 However, it causes excessive flickering when mouse is moved
4454 across the mode line. Luckily, turning it off for the mode
4455 line doesn't seem to hurt anything. -- cyd.
4456 But it is still needed for the header line. -- kfs. */
4457 || (current_row
->mouse_face_p
4458 && !(current_row
->mode_line_p
&& vpos
> 0))
4459 || current_row
->x
!= desired_row
->x
)
4461 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4463 if (desired_row
->used
[TEXT_AREA
])
4464 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4465 desired_row
->used
[TEXT_AREA
]);
4467 /* Clear to end of window. */
4468 rif
->clear_end_of_line (-1);
4471 /* This erases the cursor. We do this here because
4472 notice_overwritten_cursor cannot easily check this, which
4473 might indicate that the whole functionality of
4474 notice_overwritten_cursor would better be implemented here.
4475 On the other hand, we need notice_overwritten_cursor as long
4476 as mouse highlighting is done asynchronously outside of
4478 if (vpos
== w
->phys_cursor
.vpos
)
4479 w
->phys_cursor_on_p
= 0;
4484 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4485 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4486 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4487 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4488 int abort_skipping
= 0;
4490 /* If the desired row extends its face to the text area end, and
4491 unless the current row also does so at the same position,
4492 make sure we write at least one glyph, so that the face
4493 extension actually takes place. */
4494 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4495 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4496 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4497 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4500 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4504 /* Loop over glyphs that current and desired row may have
4508 int can_skip_p
= !abort_skipping
;
4510 /* Skip over glyphs that both rows have in common. These
4511 don't have to be written. We can't skip if the last
4512 current glyph overlaps the glyph to its right. For
4513 example, consider a current row of `if ' with the `f' in
4514 Courier bold so that it overlaps the ` ' to its right.
4515 If the desired row is ` ', we would skip over the space
4516 after the `if' and there would remain a pixel from the
4517 `f' on the screen. */
4518 if (overlapping_glyphs_p
&& i
> 0)
4520 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4523 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4525 can_skip_p
= (right
== 0 && !abort_skipping
);
4533 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4535 x
+= desired_glyph
->pixel_width
;
4536 ++desired_glyph
, ++current_glyph
, ++i
;
4539 /* Consider the case that the current row contains "xxx
4540 ppp ggg" in italic Courier font, and the desired row
4541 is "xxx ggg". The character `p' has lbearing, `g'
4542 has not. The loop above will stop in front of the
4543 first `p' in the current row. If we would start
4544 writing glyphs there, we wouldn't erase the lbearing
4545 of the `p'. The rest of the lbearing problem is then
4546 taken care of by draw_glyphs. */
4547 if (overlapping_glyphs_p
4549 && i
< current_row
->used
[TEXT_AREA
]
4550 && (current_row
->used
[TEXT_AREA
]
4551 != desired_row
->used
[TEXT_AREA
]))
4555 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4557 while (left
> 0 && i
> 0)
4559 --i
, --desired_glyph
, --current_glyph
;
4560 x
-= desired_glyph
->pixel_width
;
4561 left
-= desired_glyph
->pixel_width
;
4564 /* Abort the skipping algorithm if we end up before
4565 our starting point, to avoid looping (bug#1070).
4566 This can happen when the lbearing is larger than
4568 abort_skipping
= (i
< start_hpos
);
4572 /* Try to avoid writing the entire rest of the desired row
4573 by looking for a resync point. This mainly prevents
4574 mode line flickering in the case the mode line is in
4575 fixed-pitch font, which it usually will be. */
4576 if (i
< desired_row
->used
[TEXT_AREA
])
4578 int start_x
= x
, start_hpos
= i
;
4579 struct glyph
*start
= desired_glyph
;
4581 int skip_first_p
= !can_skip_p
;
4583 /* Find the next glyph that's equal again. */
4586 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4589 x
+= desired_glyph
->pixel_width
;
4590 current_x
+= current_glyph
->pixel_width
;
4591 ++desired_glyph
, ++current_glyph
, ++i
;
4595 if (i
== start_hpos
|| x
!= current_x
)
4599 desired_glyph
= start
;
4603 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4604 rif
->write_glyphs (start
, i
- start_hpos
);
4609 /* Write the rest. */
4610 if (i
< desired_row
->used
[TEXT_AREA
])
4612 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4613 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4617 /* Maybe clear to end of line. */
4618 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4620 /* If new row extends to the end of the text area, nothing
4621 has to be cleared, if and only if we did a write_glyphs
4622 above. This is made sure by setting desired_stop_pos
4623 appropriately above. */
4624 xassert (i
< desired_row
->used
[TEXT_AREA
]
4625 || ((desired_row
->used
[TEXT_AREA
]
4626 == current_row
->used
[TEXT_AREA
])
4627 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4629 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4631 /* If old row extends to the end of the text area, clear. */
4632 if (i
>= desired_row
->used
[TEXT_AREA
])
4633 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4634 desired_row
->pixel_width
);
4635 rif
->clear_end_of_line (-1);
4638 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4640 /* Otherwise clear to the end of the old row. Everything
4641 after that position should be clear already. */
4644 if (i
>= desired_row
->used
[TEXT_AREA
])
4645 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4646 desired_row
->pixel_width
);
4648 /* If cursor is displayed at the end of the line, make sure
4649 it's cleared. Nowadays we don't have a phys_cursor_glyph
4650 with which to erase the cursor (because this method
4651 doesn't work with lbearing/rbearing), so we must do it
4653 if (vpos
== w
->phys_cursor
.vpos
4654 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4656 w
->phys_cursor_on_p
= 0;
4660 x
= current_row
->pixel_width
;
4661 rif
->clear_end_of_line (x
);
4670 /* Update row VPOS in window W. Value is non-zero if display has been
4674 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4676 int vpos
, *mouse_face_overwritten_p
;
4678 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4679 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4680 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4683 /* Set the row being updated. This is important to let xterm.c
4684 know what line height values are in effect. */
4685 updated_row
= desired_row
;
4687 /* A row can be completely invisible in case a desired matrix was
4688 built with a vscroll and then make_cursor_line_fully_visible shifts
4689 the matrix. Make sure to make such rows current anyway, since
4690 we need the correct y-position, for example, in the current matrix. */
4691 if (desired_row
->mode_line_p
4692 || desired_row
->visible_height
> 0)
4694 xassert (desired_row
->enabled_p
);
4696 /* Update display of the left margin area, if there is one. */
4697 if (!desired_row
->full_width_p
4698 && !NILP (w
->left_margin_cols
))
4701 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4704 /* Update the display of the text area. */
4705 if (update_text_area (w
, vpos
))
4708 if (current_row
->mouse_face_p
)
4709 *mouse_face_overwritten_p
= 1;
4712 /* Update display of the right margin area, if there is one. */
4713 if (!desired_row
->full_width_p
4714 && !NILP (w
->right_margin_cols
))
4717 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4720 /* Draw truncation marks etc. */
4721 if (!current_row
->enabled_p
4722 || desired_row
->y
!= current_row
->y
4723 || desired_row
->visible_height
!= current_row
->visible_height
4724 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4725 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4726 || current_row
->redraw_fringe_bitmaps_p
4727 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4728 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4729 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4730 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4731 rif
->after_update_window_line_hook (desired_row
);
4734 /* Update current_row from desired_row. */
4735 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4741 /* Set the cursor after an update of window W. This function may only
4742 be called from update_window. */
4745 set_window_cursor_after_update (w
)
4748 struct frame
*f
= XFRAME (w
->frame
);
4749 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4750 int cx
, cy
, vpos
, hpos
;
4752 /* Not intended for frame matrix updates. */
4753 xassert (FRAME_WINDOW_P (f
));
4755 if (cursor_in_echo_area
4756 && !NILP (echo_area_buffer
[0])
4757 /* If we are showing a message instead of the mini-buffer,
4758 show the cursor for the message instead. */
4759 && XWINDOW (minibuf_window
) == w
4760 && EQ (minibuf_window
, echo_area_window
)
4761 /* These cases apply only to the frame that contains
4762 the active mini-buffer window. */
4763 && FRAME_HAS_MINIBUF_P (f
)
4764 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4766 cx
= cy
= vpos
= hpos
= 0;
4768 if (cursor_in_echo_area
>= 0)
4770 /* If the mini-buffer is several lines high, find the last
4771 line that has any text on it. Note: either all lines
4772 are enabled or none. Otherwise we wouldn't be able to
4774 struct glyph_row
*row
, *last_row
;
4775 struct glyph
*glyph
;
4776 int yb
= window_text_bottom_y (w
);
4779 row
= w
->current_matrix
->rows
;
4780 while (row
->enabled_p
4781 && (last_row
== NULL
4782 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4784 if (row
->used
[TEXT_AREA
]
4785 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4792 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4793 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4795 while (last
> start
&& last
->charpos
< 0)
4798 for (glyph
= start
; glyph
< last
; ++glyph
)
4800 cx
+= glyph
->pixel_width
;
4805 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4813 hpos
= w
->cursor
.hpos
;
4814 vpos
= w
->cursor
.vpos
;
4817 /* Window cursor can be out of sync for horizontally split windows. */
4818 hpos
= max (0, hpos
);
4819 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4820 vpos
= max (0, vpos
);
4821 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4822 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4826 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4827 tree rooted at W. */
4830 set_window_update_flags (w
, on_p
)
4836 if (!NILP (w
->hchild
))
4837 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4838 else if (!NILP (w
->vchild
))
4839 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4841 w
->must_be_updated_p
= on_p
;
4843 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4849 /***********************************************************************
4850 Window-Based Scrolling
4851 ***********************************************************************/
4853 /* Structure describing rows in scrolling_window. */
4857 /* Number of occurrences of this row in desired and current matrix. */
4858 int old_uses
, new_uses
;
4860 /* Vpos of row in new matrix. */
4861 int new_line_number
;
4863 /* Bucket index of this row_entry in the hash table row_table. */
4866 /* The row described by this entry. */
4867 struct glyph_row
*row
;
4869 /* Hash collision chain. */
4870 struct row_entry
*next
;
4873 /* A pool to allocate row_entry structures from, and the size of the
4874 pool. The pool is reallocated in scrolling_window when we find
4875 that we need a larger one. */
4877 static struct row_entry
*row_entry_pool
;
4878 static int row_entry_pool_size
;
4880 /* Index of next free entry in row_entry_pool. */
4882 static int row_entry_idx
;
4884 /* The hash table used during scrolling, and the table's size. This
4885 table is used to quickly identify equal rows in the desired and
4888 static struct row_entry
**row_table
;
4889 static int row_table_size
;
4891 /* Vectors of pointers to row_entry structures belonging to the
4892 current and desired matrix, and the size of the vectors. */
4894 static struct row_entry
**old_lines
, **new_lines
;
4895 static int old_lines_size
, new_lines_size
;
4897 /* A pool to allocate run structures from, and its size. */
4899 static struct run
*run_pool
;
4900 static int runs_size
;
4902 /* A vector of runs of lines found during scrolling. */
4904 static struct run
**runs
;
4906 /* Add glyph row ROW to the scrolling hash table during the scrolling
4909 static INLINE
struct row_entry
*
4910 add_row_entry (w
, row
)
4912 struct glyph_row
*row
;
4914 struct row_entry
*entry
;
4915 int i
= row
->hash
% row_table_size
;
4917 entry
= row_table
[i
];
4918 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4919 entry
= entry
->next
;
4923 entry
= row_entry_pool
+ row_entry_idx
++;
4925 entry
->old_uses
= entry
->new_uses
= 0;
4926 entry
->new_line_number
= 0;
4928 entry
->next
= row_table
[i
];
4929 row_table
[i
] = entry
;
4936 /* Try to reuse part of the current display of W by scrolling lines.
4937 HEADER_LINE_P non-zero means W has a header line.
4939 The algorithm is taken from Communications of the ACM, Apr78 "A
4940 Technique for Isolating Differences Between Files." It should take
4943 A short outline of the steps of the algorithm
4945 1. Skip lines equal at the start and end of both matrices.
4947 2. Enter rows in the current and desired matrix into a symbol
4948 table, counting how often they appear in both matrices.
4950 3. Rows that appear exactly once in both matrices serve as anchors,
4951 i.e. we assume that such lines are likely to have been moved.
4953 4. Starting from anchor lines, extend regions to be scrolled both
4954 forward and backward.
4958 -1 if all rows were found to be equal.
4959 0 to indicate that we did not scroll the display, or
4960 1 if we did scroll. */
4963 scrolling_window (w
, header_line_p
)
4967 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4968 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4969 int yb
= window_text_bottom_y (w
);
4970 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4971 int nruns
, nbytes
, n
, run_idx
;
4972 struct row_entry
*entry
;
4973 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4975 /* Skip over rows equal at the start. */
4976 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4978 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4979 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4983 && !d
->redraw_fringe_bitmaps_p
4985 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4986 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4987 && row_equal_p (w
, c
, d
, 1))
4996 /* Give up if some rows in the desired matrix are not enabled. */
4997 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5000 first_old
= first_new
= i
;
5002 /* Set last_new to the index + 1 of the last enabled row in the
5005 while (i
< desired_matrix
->nrows
- 1
5006 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
5007 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
5010 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5015 /* Set last_old to the index + 1 of the last enabled row in the
5016 current matrix. We don't look at the enabled flag here because
5017 we plan to reuse part of the display even if other parts are
5020 while (i
< current_matrix
->nrows
- 1)
5022 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
5031 /* Skip over rows equal at the bottom. */
5034 while (i
- 1 > first_new
5035 && j
- 1 > first_old
5036 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
5037 && (MATRIX_ROW (current_matrix
, i
- 1)->y
5038 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
5039 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
5041 MATRIX_ROW (desired_matrix
, i
- 1),
5042 MATRIX_ROW (current_matrix
, j
- 1), 1))
5047 /* Nothing to do if all rows are equal. */
5048 if (last_new
== first_new
)
5051 /* Reallocate vectors, tables etc. if necessary. */
5053 if (current_matrix
->nrows
> old_lines_size
)
5055 old_lines_size
= current_matrix
->nrows
;
5056 nbytes
= old_lines_size
* sizeof *old_lines
;
5057 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5060 if (desired_matrix
->nrows
> new_lines_size
)
5062 new_lines_size
= desired_matrix
->nrows
;
5063 nbytes
= new_lines_size
* sizeof *new_lines
;
5064 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5067 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5068 if (3 * n
> row_table_size
)
5070 row_table_size
= next_almost_prime (3 * n
);
5071 nbytes
= row_table_size
* sizeof *row_table
;
5072 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5073 bzero (row_table
, nbytes
);
5076 if (n
> row_entry_pool_size
)
5078 row_entry_pool_size
= n
;
5079 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5080 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5083 if (desired_matrix
->nrows
> runs_size
)
5085 runs_size
= desired_matrix
->nrows
;
5086 nbytes
= runs_size
* sizeof *runs
;
5087 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5088 nbytes
= runs_size
* sizeof *run_pool
;
5089 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5092 nruns
= run_idx
= 0;
5095 /* Add rows from the current and desired matrix to the hash table
5096 row_hash_table to be able to find equal ones quickly. */
5098 for (i
= first_old
; i
< last_old
; ++i
)
5100 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5102 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5103 old_lines
[i
] = entry
;
5107 old_lines
[i
] = NULL
;
5110 for (i
= first_new
; i
< last_new
; ++i
)
5112 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5113 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5115 entry
->new_line_number
= i
;
5116 new_lines
[i
] = entry
;
5119 /* Identify moves based on lines that are unique and equal
5120 in both matrices. */
5121 for (i
= first_old
; i
< last_old
;)
5123 && old_lines
[i
]->old_uses
== 1
5124 && old_lines
[i
]->new_uses
== 1)
5127 int new_line
= old_lines
[i
]->new_line_number
;
5128 struct run
*run
= run_pool
+ run_idx
++;
5131 run
->current_vpos
= i
;
5132 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5133 run
->desired_vpos
= new_line
;
5134 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5136 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5138 /* Extend backward. */
5141 while (j
> first_old
5143 && old_lines
[j
] == new_lines
[k
])
5145 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5146 --run
->current_vpos
;
5147 --run
->desired_vpos
;
5150 run
->desired_y
-= h
;
5151 run
->current_y
-= h
;
5155 /* Extend forward. */
5160 && old_lines
[j
] == new_lines
[k
])
5162 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5168 /* Insert run into list of all runs. Order runs by copied
5169 pixel lines. Note that we record runs that don't have to
5170 be copied because they are already in place. This is done
5171 because we can avoid calling update_window_line in this
5173 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5175 for (k
= nruns
; k
> j
; --k
)
5176 runs
[k
] = runs
[k
- 1];
5185 /* Do the moves. Do it in a way that we don't overwrite something
5186 we want to copy later on. This is not solvable in general
5187 because there is only one display and we don't have a way to
5188 exchange areas on this display. Example:
5190 +-----------+ +-----------+
5192 +-----------+ --> +-----------+
5194 +-----------+ +-----------+
5196 Instead, prefer bigger moves, and invalidate moves that would
5197 copy from where we copied to. */
5199 for (i
= 0; i
< nruns
; ++i
)
5200 if (runs
[i
]->nrows
> 0)
5202 struct run
*r
= runs
[i
];
5204 /* Copy on the display. */
5205 if (r
->current_y
!= r
->desired_y
)
5207 rif
->scroll_run_hook (w
, r
);
5209 /* Invalidate runs that copy from where we copied to. */
5210 for (j
= i
+ 1; j
< nruns
; ++j
)
5212 struct run
*p
= runs
[j
];
5214 if ((p
->current_y
>= r
->desired_y
5215 && p
->current_y
< r
->desired_y
+ r
->height
)
5216 || (p
->current_y
+ p
->height
>= r
->desired_y
5217 && (p
->current_y
+ p
->height
5218 < r
->desired_y
+ r
->height
)))
5223 /* Assign matrix rows. */
5224 for (j
= 0; j
< r
->nrows
; ++j
)
5226 struct glyph_row
*from
, *to
;
5227 int to_overlapped_p
;
5229 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5230 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5231 to_overlapped_p
= to
->overlapped_p
;
5232 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5233 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5234 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5235 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5236 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5237 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5238 from
->redraw_fringe_bitmaps_p
= 1;
5239 assign_row (to
, from
);
5240 to
->enabled_p
= 1, from
->enabled_p
= 0;
5241 to
->overlapped_p
= to_overlapped_p
;
5245 /* Clear the hash table, for the next time. */
5246 for (i
= 0; i
< row_entry_idx
; ++i
)
5247 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5249 /* Value is > 0 to indicate that we scrolled the display. */
5255 /************************************************************************
5257 ************************************************************************/
5259 /* Update the desired frame matrix of frame F.
5261 FORCE_P non-zero means that the update should not be stopped by
5262 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5263 should not be tried.
5265 Value is non-zero if update was stopped due to pending input. */
5268 update_frame_1 (f
, force_p
, inhibit_id_p
)
5273 /* Frame matrices to work on. */
5274 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5275 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5278 int preempt_count
= baud_rate
/ 2400 + 1;
5279 extern int input_pending
;
5281 xassert (current_matrix
&& desired_matrix
);
5283 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5284 calculate_costs (f
);
5286 if (preempt_count
<= 0)
5289 #if !PERIODIC_PREEMPTION_CHECKING
5290 if (!force_p
&& detect_input_pending_ignore_squeezables ())
5297 /* If we cannot insert/delete lines, it's no use trying it. */
5298 if (!FRAME_LINE_INS_DEL_OK (f
))
5301 /* See if any of the desired lines are enabled; don't compute for
5302 i/d line if just want cursor motion. */
5303 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5304 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5307 /* Try doing i/d line, if not yet inhibited. */
5308 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5309 force_p
|= scrolling (f
);
5311 /* Update the individual lines as needed. Do bottom line first. */
5312 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5313 update_frame_line (f
, desired_matrix
->nrows
- 1);
5315 /* Now update the rest of the lines. */
5316 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5318 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5320 if (FRAME_TERMCAP_P (f
))
5322 /* Flush out every so many lines.
5323 Also flush out if likely to have more than 1k buffered
5324 otherwise. I'm told that some telnet connections get
5325 really screwed by more than 1k output at once. */
5326 FILE *display_output
= FRAME_TTY (f
)->output
;
5329 int outq
= PENDING_OUTPUT_COUNT (display_output
);
5331 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5333 fflush (display_output
);
5334 if (preempt_count
== 1)
5336 #ifdef EMACS_OUTQSIZE
5337 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5338 /* Probably not a tty. Ignore the error and reset
5340 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5343 if (baud_rate
<= outq
&& baud_rate
> 0)
5344 sleep (outq
/ baud_rate
);
5350 #if PERIODIC_PREEMPTION_CHECKING
5354 EMACS_GET_TIME (tm
);
5355 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5356 if (EMACS_TIME_NEG_P (dif
))
5358 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5359 if (detect_input_pending_ignore_squeezables ())
5364 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5365 detect_input_pending_ignore_squeezables ();
5368 update_frame_line (f
, i
);
5372 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5374 /* Now just clean up termcap drivers and set cursor, etc. */
5377 if ((cursor_in_echo_area
5378 /* If we are showing a message instead of the mini-buffer,
5379 show the cursor for the message instead of for the
5380 (now hidden) mini-buffer contents. */
5381 || (EQ (minibuf_window
, selected_window
)
5382 && EQ (minibuf_window
, echo_area_window
)
5383 && !NILP (echo_area_buffer
[0])))
5384 /* These cases apply only to the frame that contains
5385 the active mini-buffer window. */
5386 && FRAME_HAS_MINIBUF_P (f
)
5387 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5389 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5392 if (cursor_in_echo_area
< 0)
5394 /* Negative value of cursor_in_echo_area means put
5395 cursor at beginning of line. */
5401 /* Positive value of cursor_in_echo_area means put
5402 cursor at the end of the prompt. If the mini-buffer
5403 is several lines high, find the last line that has
5405 row
= FRAME_LINES (f
);
5411 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5413 /* Frame rows are filled up with spaces that
5414 must be ignored here. */
5415 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5417 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5418 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5421 && (last
- 1)->charpos
< 0)
5427 while (row
> top
&& col
== 0);
5429 /* Make sure COL is not out of range. */
5430 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5432 /* If we have another row, advance cursor into it. */
5433 if (row
< FRAME_LINES (f
) - 1)
5435 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5438 /* Otherwise move it back in range. */
5440 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5444 cursor_to (f
, row
, col
);
5448 /* We have only one cursor on terminal frames. Use it to
5449 display the cursor of the selected window. */
5450 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5451 if (w
->cursor
.vpos
>= 0
5452 /* The cursor vpos may be temporarily out of bounds
5453 in the following situation: There is one window,
5454 with the cursor in the lower half of it. The window
5455 is split, and a message causes a redisplay before
5456 a new cursor position has been computed. */
5457 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5459 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5460 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5462 if (INTEGERP (w
->left_margin_cols
))
5463 x
+= XFASTINT (w
->left_margin_cols
);
5465 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5466 cursor_to (f
, y
, x
);
5473 clear_desired_matrices (f
);
5478 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5482 struct frame
*frame
;
5484 int unchanged_at_top
, unchanged_at_bottom
;
5487 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5488 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5489 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5490 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5492 int free_at_end_vpos
= FRAME_LINES (frame
);
5493 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5494 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5496 if (!current_matrix
)
5499 /* Compute hash codes of all the lines. Also calculate number of
5500 changed lines, number of unchanged lines at the beginning, and
5501 number of unchanged lines at the end. */
5503 unchanged_at_top
= 0;
5504 unchanged_at_bottom
= FRAME_LINES (frame
);
5505 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5507 /* Give up on this scrolling if some old lines are not enabled. */
5508 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5510 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5511 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5513 /* This line cannot be redrawn, so don't let scrolling mess it. */
5514 new_hash
[i
] = old_hash
[i
];
5515 #define INFINITY 1000000 /* Taken from scroll.c */
5516 draw_cost
[i
] = INFINITY
;
5520 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5521 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5524 if (old_hash
[i
] != new_hash
[i
])
5527 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5529 else if (i
== unchanged_at_top
)
5531 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5534 /* If changed lines are few, don't allow preemption, don't scroll. */
5535 if ((!FRAME_SCROLL_REGION_OK (frame
)
5536 && changed_lines
< baud_rate
/ 2400)
5537 || unchanged_at_bottom
== FRAME_LINES (frame
))
5540 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5541 - unchanged_at_bottom
);
5543 if (FRAME_SCROLL_REGION_OK (frame
))
5544 free_at_end_vpos
-= unchanged_at_bottom
;
5545 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5546 free_at_end_vpos
= -1;
5548 /* If large window, fast terminal and few lines in common between
5549 current frame and desired frame, don't bother with i/d calc. */
5550 if (!FRAME_SCROLL_REGION_OK (frame
)
5551 && window_size
>= 18 && baud_rate
> 2400
5553 10 * scrolling_max_lines_saved (unchanged_at_top
,
5554 FRAME_LINES (frame
) - unchanged_at_bottom
,
5555 old_hash
, new_hash
, draw_cost
)))
5558 if (window_size
< 2)
5561 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5562 draw_cost
+ unchanged_at_top
- 1,
5563 old_draw_cost
+ unchanged_at_top
- 1,
5564 old_hash
+ unchanged_at_top
- 1,
5565 new_hash
+ unchanged_at_top
- 1,
5566 free_at_end_vpos
- unchanged_at_top
);
5572 /* Count the number of blanks at the start of the vector of glyphs R
5573 which is LEN glyphs long. */
5576 count_blanks (r
, len
)
5582 for (i
= 0; i
< len
; ++i
)
5583 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5590 /* Count the number of glyphs in common at the start of the glyph
5591 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5592 of STR2. Value is the number of equal glyphs equal at the start. */
5595 count_match (str1
, end1
, str2
, end2
)
5596 struct glyph
*str1
, *end1
, *str2
, *end2
;
5598 struct glyph
*p1
= str1
;
5599 struct glyph
*p2
= str2
;
5603 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5610 /* Char insertion/deletion cost vector, from term.c */
5612 extern int *char_ins_del_vector
;
5613 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5616 /* Perform a frame-based update on line VPOS in frame FRAME. */
5619 update_frame_line (f
, vpos
)
5623 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5625 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5626 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5627 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5628 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5629 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5630 int must_write_whole_line_p
;
5631 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5632 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5633 != FACE_TTY_DEFAULT_BG_COLOR
);
5635 if (colored_spaces_p
)
5638 /* Current row not enabled means it has unknown contents. We must
5639 write the whole desired line in that case. */
5640 must_write_whole_line_p
= !current_row
->enabled_p
;
5641 if (must_write_whole_line_p
)
5648 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5649 olen
= current_row
->used
[TEXT_AREA
];
5651 /* Ignore trailing spaces, if we can. */
5652 if (!write_spaces_p
)
5653 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5657 current_row
->enabled_p
= 1;
5658 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5660 /* If desired line is empty, just clear the line. */
5661 if (!desired_row
->enabled_p
)
5667 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5668 nlen
= desired_row
->used
[TEXT_AREA
];
5669 nend
= nbody
+ nlen
;
5671 /* If display line has unknown contents, write the whole line. */
5672 if (must_write_whole_line_p
)
5674 /* Ignore spaces at the end, if we can. */
5675 if (!write_spaces_p
)
5676 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5679 /* Write the contents of the desired line. */
5682 cursor_to (f
, vpos
, 0);
5683 write_glyphs (f
, nbody
, nlen
);
5686 /* Don't call clear_end_of_line if we already wrote the whole
5687 line. The cursor will not be at the right margin in that
5688 case but in the line below. */
5689 if (nlen
< FRAME_TOTAL_COLS (f
))
5691 cursor_to (f
, vpos
, nlen
);
5692 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5695 /* Make sure we are in the right row, otherwise cursor movement
5696 with cmgoto might use `ch' in the wrong row. */
5697 cursor_to (f
, vpos
, 0);
5699 make_current (desired_matrix
, current_matrix
, vpos
);
5703 /* Pretend trailing spaces are not there at all,
5704 unless for one reason or another we must write all spaces. */
5705 if (!write_spaces_p
)
5706 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5709 /* If there's no i/d char, quickly do the best we can without it. */
5710 if (!FRAME_CHAR_INS_DEL_OK (f
))
5714 /* Find the first glyph in desired row that doesn't agree with
5715 a glyph in the current row, and write the rest from there on. */
5716 for (i
= 0; i
< nlen
; i
++)
5718 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5720 /* Find the end of the run of different glyphs. */
5724 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5725 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5728 /* Output this run of non-matching chars. */
5729 cursor_to (f
, vpos
, i
);
5730 write_glyphs (f
, nbody
+ i
, j
- i
);
5733 /* Now find the next non-match. */
5737 /* Clear the rest of the line, or the non-clear part of it. */
5740 cursor_to (f
, vpos
, nlen
);
5741 clear_end_of_line (f
, olen
);
5744 /* Make current row = desired row. */
5745 make_current (desired_matrix
, current_matrix
, vpos
);
5749 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5750 characters in a row. */
5754 /* If current line is blank, skip over initial spaces, if
5755 possible, and write the rest. */
5759 nsp
= count_blanks (nbody
, nlen
);
5763 cursor_to (f
, vpos
, nsp
);
5764 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5767 /* Exchange contents between current_frame and new_frame. */
5768 make_current (desired_matrix
, current_matrix
, vpos
);
5772 /* Compute number of leading blanks in old and new contents. */
5773 osp
= count_blanks (obody
, olen
);
5774 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5776 /* Compute number of matching chars starting with first non-blank. */
5777 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5778 nbody
+ nsp
, nbody
+ nlen
);
5780 /* Spaces in new match implicit space past the end of old. */
5781 /* A bug causing this to be a no-op was fixed in 18.29. */
5782 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5785 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5789 /* Avoid doing insert/delete char
5790 just cause number of leading spaces differs
5791 when the following text does not match. */
5792 if (begmatch
== 0 && osp
!= nsp
)
5793 osp
= nsp
= min (osp
, nsp
);
5795 /* Find matching characters at end of line */
5798 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5800 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5805 endmatch
= obody
+ olen
- op1
;
5807 /* tem gets the distance to insert or delete.
5808 endmatch is how many characters we save by doing so.
5811 tem
= (nlen
- nsp
) - (olen
- osp
);
5813 && (!FRAME_CHAR_INS_DEL_OK (f
)
5814 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5817 /* nsp - osp is the distance to insert or delete.
5818 If that is nonzero, begmatch is known to be nonzero also.
5819 begmatch + endmatch is how much we save by doing the ins/del.
5823 && (!FRAME_CHAR_INS_DEL_OK (f
)
5824 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5828 osp
= nsp
= min (osp
, nsp
);
5831 /* Now go through the line, inserting, writing and
5832 deleting as appropriate. */
5836 cursor_to (f
, vpos
, nsp
);
5837 delete_glyphs (f
, osp
- nsp
);
5841 /* If going to delete chars later in line
5842 and insert earlier in the line,
5843 must delete first to avoid losing data in the insert */
5844 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5846 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5847 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5848 olen
= nlen
- (nsp
- osp
);
5850 cursor_to (f
, vpos
, osp
);
5851 insert_glyphs (f
, 0, nsp
- osp
);
5855 tem
= nsp
+ begmatch
+ endmatch
;
5856 if (nlen
!= tem
|| olen
!= tem
)
5858 if (!endmatch
|| nlen
== olen
)
5860 /* If new text being written reaches right margin, there is
5861 no need to do clear-to-eol at the end of this function
5862 (and it would not be safe, since cursor is not going to
5863 be "at the margin" after the text is done). */
5864 if (nlen
== FRAME_TOTAL_COLS (f
))
5867 /* Function write_glyphs is prepared to do nothing
5868 if passed a length <= 0. Check it here to avoid
5869 unnecessary cursor movement. */
5872 cursor_to (f
, vpos
, nsp
+ begmatch
);
5873 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5876 else if (nlen
> olen
)
5878 /* Here, we used to have the following simple code:
5879 ----------------------------------------
5880 write_glyphs (nbody + nsp + begmatch, olen - tem);
5881 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5882 ----------------------------------------
5883 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5884 is a padding glyph. */
5885 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5888 cursor_to (f
, vpos
, nsp
+ begmatch
);
5890 /* Calculate columns we can actually overwrite. */
5891 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5893 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5895 /* If we left columns to be overwritten, we must delete them. */
5896 del
= olen
- tem
- out
;
5898 delete_glyphs (f
, del
);
5900 /* At last, we insert columns not yet written out. */
5901 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5904 else if (olen
> nlen
)
5906 cursor_to (f
, vpos
, nsp
+ begmatch
);
5907 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5908 delete_glyphs (f
, olen
- nlen
);
5914 /* If any unerased characters remain after the new line, erase them. */
5917 cursor_to (f
, vpos
, nlen
);
5918 clear_end_of_line (f
, olen
);
5921 /* Exchange contents between current_frame and new_frame. */
5922 make_current (desired_matrix
, current_matrix
, vpos
);
5927 /***********************************************************************
5928 X/Y Position -> Buffer Position
5929 ***********************************************************************/
5931 /* Determine what's under window-relative pixel position (*X, *Y).
5932 Return the object (string or buffer) that's there.
5933 Return in *POS the position in that object.
5934 Adjust *X and *Y to character positions. */
5937 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5940 struct display_pos
*pos
;
5941 Lisp_Object
*object
;
5943 int *width
, *height
;
5946 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5947 struct text_pos startp
;
5949 struct glyph_row
*row
;
5950 #ifdef HAVE_WINDOW_SYSTEM
5951 struct image
*img
= 0;
5955 /* We used to set current_buffer directly here, but that does the
5956 wrong thing with `face-remapping-alist' (bug#2044). */
5957 Fset_buffer (w
->buffer
);
5958 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5959 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5960 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5961 start_display (&it
, w
, startp
);
5963 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5964 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5965 MOVE_TO_X
| MOVE_TO_Y
);
5967 Fset_buffer (old_current_buffer
);
5969 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5970 *dy
= *y
- it
.current_y
;
5973 if (STRINGP (it
.string
))
5977 #ifdef HAVE_WINDOW_SYSTEM
5978 if (it
.what
== IT_IMAGE
)
5980 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5981 && !NILP (img
->spec
))
5982 *object
= img
->spec
;
5986 if (it
.vpos
< w
->current_matrix
->nrows
5987 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5990 if (it
.hpos
< row
->used
[TEXT_AREA
])
5992 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5993 #ifdef HAVE_WINDOW_SYSTEM
5996 *dy
-= row
->ascent
- glyph
->ascent
;
5997 *dx
+= glyph
->slice
.x
;
5998 *dy
+= glyph
->slice
.y
;
5999 /* Image slices positions are still relative to the entire image */
6000 *width
= img
->width
;
6001 *height
= img
->height
;
6006 *width
= glyph
->pixel_width
;
6007 *height
= glyph
->ascent
+ glyph
->descent
;
6013 *height
= row
->height
;
6018 *width
= *height
= 0;
6021 /* Add extra (default width) columns if clicked after EOL. */
6022 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
6024 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
6033 /* Value is the string under window-relative coordinates X/Y in the
6034 mode line or header line (PART says which) of window W, or nil if none.
6035 *CHARPOS is set to the position in the string returned. */
6038 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6040 enum window_part part
;
6043 Lisp_Object
*object
;
6045 int *width
, *height
;
6047 struct glyph_row
*row
;
6048 struct glyph
*glyph
, *end
;
6050 Lisp_Object string
= Qnil
;
6052 if (part
== ON_MODE_LINE
)
6053 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
6055 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
6057 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6059 if (row
->mode_line_p
&& row
->enabled_p
)
6061 /* Find the glyph under X. If we find one with a string object,
6062 it's the one we were looking for. */
6063 glyph
= row
->glyphs
[TEXT_AREA
];
6064 end
= glyph
+ row
->used
[TEXT_AREA
];
6065 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6066 x0
-= glyph
->pixel_width
;
6067 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6070 string
= glyph
->object
;
6071 *charpos
= glyph
->charpos
;
6072 *width
= glyph
->pixel_width
;
6073 *height
= glyph
->ascent
+ glyph
->descent
;
6074 #ifdef HAVE_WINDOW_SYSTEM
6075 if (glyph
->type
== IMAGE_GLYPH
)
6078 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6080 *object
= img
->spec
;
6081 y0
-= row
->ascent
- glyph
->ascent
;
6087 /* Add extra (default width) columns if clicked after EOL. */
6088 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6090 *height
= row
->height
;
6097 *width
= *height
= 0;
6107 /* Value is the string under window-relative coordinates X/Y in either
6108 marginal area, or nil if none. *CHARPOS is set to the position in
6109 the string returned. */
6112 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6114 enum window_part part
;
6117 Lisp_Object
*object
;
6119 int *width
, *height
;
6121 struct glyph_row
*row
= w
->current_matrix
->rows
;
6122 struct glyph
*glyph
, *end
;
6123 int x0
, y0
, i
, wy
= *y
;
6125 Lisp_Object string
= Qnil
;
6127 if (part
== ON_LEFT_MARGIN
)
6128 area
= LEFT_MARGIN_AREA
;
6129 else if (part
== ON_RIGHT_MARGIN
)
6130 area
= RIGHT_MARGIN_AREA
;
6134 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6135 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6138 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6142 /* Find the glyph under X. If we find one with a string object,
6143 it's the one we were looking for. */
6144 if (area
== RIGHT_MARGIN_AREA
)
6145 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6146 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6147 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6148 + window_box_width (w
, LEFT_MARGIN_AREA
)
6149 + window_box_width (w
, TEXT_AREA
));
6151 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6152 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6155 glyph
= row
->glyphs
[area
];
6156 end
= glyph
+ row
->used
[area
];
6157 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6158 x0
-= glyph
->pixel_width
;
6159 *x
= glyph
- row
->glyphs
[area
];
6162 string
= glyph
->object
;
6163 *charpos
= glyph
->charpos
;
6164 *width
= glyph
->pixel_width
;
6165 *height
= glyph
->ascent
+ glyph
->descent
;
6166 #ifdef HAVE_WINDOW_SYSTEM
6167 if (glyph
->type
== IMAGE_GLYPH
)
6170 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6172 *object
= img
->spec
;
6173 y0
-= row
->ascent
- glyph
->ascent
;
6174 x0
+= glyph
->slice
.x
;
6175 y0
+= glyph
->slice
.y
;
6181 /* Add extra (default width) columns if clicked after EOL. */
6182 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6184 *height
= row
->height
;
6191 *width
= *height
= 0;
6201 /***********************************************************************
6202 Changing Frame Sizes
6203 ***********************************************************************/
6208 window_change_signal (signalnum
) /* If we don't have an argument, */
6209 int signalnum
; /* some compilers complain in signal calls. */
6215 int old_errno
= errno
;
6217 struct tty_display_info
*tty
;
6219 signal (SIGWINCH
, window_change_signal
);
6220 SIGNAL_THREAD_CHECK (signalnum
);
6222 /* The frame size change obviously applies to a single
6223 termcap-controlled terminal, but we can't decide which.
6224 Therefore, we resize the frames corresponding to each tty.
6226 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6228 if (! tty
->term_initted
)
6231 /* Suspended tty frames have tty->input == NULL avoid trying to
6236 get_tty_size (fileno (tty
->input
), &width
, &height
);
6238 if (width
> 5 && height
> 2) {
6239 Lisp_Object tail
, frame
;
6241 FOR_EACH_FRAME (tail
, frame
)
6242 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6243 /* Record the new sizes, but don't reallocate the data
6244 structures now. Let that be done later outside of the
6246 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6252 #endif /* SIGWINCH */
6255 /* Do any change in frame size that was requested by a signal. SAFE
6256 non-zero means this function is called from a place where it is
6257 safe to change frame sizes while a redisplay is in progress. */
6260 do_pending_window_change (safe
)
6263 /* If window_change_signal should have run before, run it now. */
6264 if (redisplaying_p
&& !safe
)
6267 while (delayed_size_change
)
6269 Lisp_Object tail
, frame
;
6271 delayed_size_change
= 0;
6273 FOR_EACH_FRAME (tail
, frame
)
6275 struct frame
*f
= XFRAME (frame
);
6277 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6278 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6285 /* Change the frame height and/or width. Values may be given as zero to
6286 indicate no change is to take place.
6288 If DELAY is non-zero, then assume we're being called from a signal
6289 handler, and queue the change for later - perhaps the next
6290 redisplay. Since this tries to resize windows, we can't call it
6291 from a signal handler.
6293 SAFE non-zero means this function is called from a place where it's
6294 safe to change frame sizes while a redisplay is in progress. */
6297 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6298 register struct frame
*f
;
6299 int newheight
, newwidth
, pretend
, delay
, safe
;
6301 Lisp_Object tail
, frame
;
6303 if (FRAME_MSDOS_P (f
))
6305 /* On MS-DOS, all frames use the same screen, so a change in
6306 size affects all frames. Termcap now supports multiple
6308 FOR_EACH_FRAME (tail
, frame
)
6309 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6310 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6311 pretend
, delay
, safe
);
6314 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6318 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6319 register struct frame
*f
;
6320 int newheight
, newwidth
, pretend
, delay
, safe
;
6322 int new_frame_total_cols
;
6323 int count
= SPECPDL_INDEX ();
6325 /* If we can't deal with the change now, queue it for later. */
6326 if (delay
|| (redisplaying_p
&& !safe
))
6328 f
->new_text_lines
= newheight
;
6329 f
->new_text_cols
= newwidth
;
6330 delayed_size_change
= 1;
6334 /* This size-change overrides any pending one for this frame. */
6335 f
->new_text_lines
= 0;
6336 f
->new_text_cols
= 0;
6338 /* If an argument is zero, set it to the current value. */
6340 newheight
= FRAME_LINES (f
);
6342 newwidth
= FRAME_COLS (f
);
6344 /* Compute width of windows in F.
6345 This is the width of the frame without vertical scroll bars. */
6346 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6348 /* Round up to the smallest acceptable size. */
6349 check_frame_size (f
, &newheight
, &newwidth
);
6351 /* If we're not changing the frame size, quit now. */
6352 /* Frame width may be unchanged but the text portion may change, for example,
6353 fullscreen and remove/add scroll bar. */
6354 if (newheight
== FRAME_LINES (f
)
6355 && newwidth
== FRAME_COLS (f
) // text portion unchanged
6356 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
6362 /* We only can set screen dimensions to certain values supported
6363 by our video hardware. Try to find the smallest size greater
6364 or equal to the requested dimensions. */
6365 dos_set_window_size (&newheight
, &newwidth
);
6368 if (newheight
!= FRAME_LINES (f
))
6370 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6372 /* Frame has both root and mini-buffer. */
6373 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6374 FRAME_TOP_MARGIN (f
));
6375 set_window_height (FRAME_ROOT_WINDOW (f
),
6378 - FRAME_TOP_MARGIN (f
)),
6380 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6382 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6385 /* Frame has just one top-level window. */
6386 set_window_height (FRAME_ROOT_WINDOW (f
),
6387 newheight
- FRAME_TOP_MARGIN (f
), 2);
6389 /* MSDOS frames cannot PRETEND, as they change frame size by
6390 manipulating video hardware. */
6391 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6392 FrameRows (FRAME_TTY (f
)) = newheight
;
6395 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6397 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6398 if (FRAME_HAS_MINIBUF_P (f
))
6399 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6401 /* MSDOS frames cannot PRETEND, as they change frame size by
6402 manipulating video hardware. */
6403 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6404 FrameCols (FRAME_TTY (f
)) = newwidth
;
6406 if (WINDOWP (f
->tool_bar_window
))
6407 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6410 FRAME_LINES (f
) = newheight
;
6411 SET_FRAME_COLS (f
, newwidth
);
6414 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6415 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6417 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6419 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6420 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6421 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6422 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6426 calculate_costs (f
);
6427 SET_FRAME_GARBAGED (f
);
6432 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6434 run_window_configuration_change_hook (f
);
6436 unbind_to (count
, Qnil
);
6441 /***********************************************************************
6442 Terminal Related Lisp Functions
6443 ***********************************************************************/
6445 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6446 1, 1, "FOpen termscript file: ",
6447 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6448 FILE = nil means just close any termscript file currently open. */)
6452 struct tty_display_info
*tty
;
6454 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
6455 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
6456 error ("Current frame is not on a tty device");
6460 if (tty
->termscript
!= 0)
6463 fclose (tty
->termscript
);
6466 tty
->termscript
= 0;
6470 file
= Fexpand_file_name (file
, Qnil
);
6471 tty
->termscript
= fopen (SDATA (file
), "w");
6472 if (tty
->termscript
== 0)
6473 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6479 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6480 Ssend_string_to_terminal
, 1, 2, 0,
6481 doc
: /* Send STRING to the terminal without alteration.
6482 Control characters in STRING will have terminal-dependent effects.
6484 Optional parameter TERMINAL specifies the tty terminal device to use.
6485 It may be a terminal object, a frame, or nil for the terminal used by
6486 the currently selected frame. In batch mode, STRING is sent to stdout
6487 when TERMINAL is nil. */)
6490 Lisp_Object terminal
;
6492 struct terminal
*t
= get_terminal (terminal
, 1);
6495 /* ??? Perhaps we should do something special for multibyte strings here. */
6496 CHECK_STRING (string
);
6500 error ("Unknown terminal device");
6502 if (t
->type
== output_initial
)
6504 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
6505 error ("Device %d is not a termcap terminal device", t
->id
);
6508 struct tty_display_info
*tty
= t
->display_info
.tty
;
6511 error ("Terminal is currently suspended");
6513 if (tty
->termscript
)
6515 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6516 fflush (tty
->termscript
);
6520 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
6527 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6528 doc
: /* Beep, or flash the screen.
6529 Also, unless an argument is given,
6530 terminate any keyboard macro currently executing. */)
6539 ring_bell (XFRAME (selected_frame
));
6552 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6553 error ("Keyboard macro terminated by a command ringing the bell");
6555 ring_bell (XFRAME (selected_frame
));
6560 /***********************************************************************
6562 ***********************************************************************/
6564 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6565 doc
: /* Pause, without updating display, for SECONDS seconds.
6566 SECONDS may be a floating-point value, meaning that you can wait for a
6567 fraction of a second. Optional second arg MILLISECONDS specifies an
6568 additional wait period, in milliseconds; this may be useful if your
6569 Emacs was built without floating point support.
6570 \(Not all operating systems support waiting for a fraction of a second.) */)
6571 (seconds
, milliseconds
)
6572 Lisp_Object seconds
, milliseconds
;
6576 if (NILP (milliseconds
))
6577 XSETINT (milliseconds
, 0);
6579 CHECK_NUMBER (milliseconds
);
6580 usec
= XINT (milliseconds
) * 1000;
6583 double duration
= extract_float (seconds
);
6584 sec
= (int) duration
;
6585 usec
+= (duration
- sec
) * 1000000;
6588 #ifndef EMACS_HAS_USECS
6589 if (sec
== 0 && usec
!= 0)
6590 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6593 /* Assure that 0 <= usec < 1000000. */
6596 /* We can't rely on the rounding being correct if usec is negative. */
6597 if (-1000000 < usec
)
6598 sec
--, usec
+= 1000000;
6600 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6603 sec
+= usec
/ 1000000, usec
%= 1000000;
6605 if (sec
< 0 || (sec
== 0 && usec
== 0))
6608 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6614 /* This is just like wait_reading_process_output, except that
6617 TIMEOUT is number of seconds to wait (float or integer),
6618 or t to wait forever.
6619 READING is 1 if reading input.
6620 If DO_DISPLAY is >0 display process output while waiting.
6621 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6625 sit_for (timeout
, reading
, do_display
)
6626 Lisp_Object timeout
;
6627 int reading
, do_display
;
6631 swallow_events (do_display
);
6633 if ((detect_input_pending_run_timers (do_display
))
6634 || !NILP (Vexecuting_kbd_macro
))
6637 if (do_display
>= 2)
6638 redisplay_preserve_echo_area (2);
6640 if (INTEGERP (timeout
))
6642 sec
= XINT (timeout
);
6645 else if (FLOATP (timeout
))
6647 double seconds
= XFLOAT_DATA (timeout
);
6648 sec
= (int) seconds
;
6649 usec
= (int) ((seconds
- sec
) * 1000000);
6651 else if (EQ (timeout
, Qt
))
6657 wrong_type_argument (Qnumberp
, timeout
);
6659 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6666 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6669 return detect_input_pending () ? Qnil
: Qt
;
6673 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6674 doc
: /* Perform redisplay if no input is available.
6675 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6676 perform a full redisplay even if input is available.
6677 Return t if redisplay was performed, nil otherwise. */)
6684 if ((detect_input_pending_run_timers (1)
6685 && NILP (force
) && !redisplay_dont_pause
)
6686 || !NILP (Vexecuting_kbd_macro
))
6689 count
= SPECPDL_INDEX ();
6690 if (!NILP (force
) && !redisplay_dont_pause
)
6691 specbind (Qredisplay_dont_pause
, Qt
);
6692 redisplay_preserve_echo_area (2);
6693 unbind_to (count
, Qnil
);
6699 /***********************************************************************
6700 Other Lisp Functions
6701 ***********************************************************************/
6703 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6704 session's frames, frame names, buffers, buffer-read-only flags, and
6705 buffer-modified-flags. */
6707 static Lisp_Object frame_and_buffer_state
;
6710 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6711 Sframe_or_buffer_changed_p
, 0, 1, 0,
6712 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6713 VARIABLE is a variable name whose value is either nil or a state vector
6714 that will be updated to contain all frames and buffers,
6715 aside from buffers whose names start with space,
6716 along with the buffers' read-only and modified flags. This allows a fast
6717 check to see whether buffer menus might need to be recomputed.
6718 If this function returns non-nil, it updates the internal vector to reflect
6721 If VARIABLE is nil, an internal variable is used. Users should not
6722 pass nil for VARIABLE. */)
6724 Lisp_Object variable
;
6726 Lisp_Object state
, tail
, frame
, buf
;
6727 Lisp_Object
*vecp
, *end
;
6730 if (! NILP (variable
))
6732 CHECK_SYMBOL (variable
);
6733 state
= Fsymbol_value (variable
);
6734 if (! VECTORP (state
))
6738 state
= frame_and_buffer_state
;
6740 vecp
= XVECTOR (state
)->contents
;
6741 end
= vecp
+ XVECTOR (state
)->size
;
6743 FOR_EACH_FRAME (tail
, frame
)
6747 if (!EQ (*vecp
++, frame
))
6751 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6754 /* Check that the buffer info matches. */
6755 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6757 buf
= XCDR (XCAR (tail
));
6758 /* Ignore buffers that aren't included in buffer lists. */
6759 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6763 if (!EQ (*vecp
++, buf
))
6767 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6771 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6776 /* Detect deletion of a buffer at the end of the list. */
6777 if (EQ (*vecp
, Qlambda
))
6780 /* Come here if we decide the data has changed. */
6782 /* Count the size we will need.
6783 Start with 1 so there is room for at least one lambda at the end. */
6785 FOR_EACH_FRAME (tail
, frame
)
6787 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6789 /* Reallocate the vector if data has grown to need it,
6790 or if it has shrunk a lot. */
6791 if (! VECTORP (state
)
6792 || n
> XVECTOR (state
)->size
6793 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6794 /* Add 20 extra so we grow it less often. */
6796 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6797 if (! NILP (variable
))
6798 Fset (variable
, state
);
6800 frame_and_buffer_state
= state
;
6803 /* Record the new data in the (possibly reallocated) vector. */
6804 vecp
= XVECTOR (state
)->contents
;
6805 FOR_EACH_FRAME (tail
, frame
)
6808 *vecp
++ = XFRAME (frame
)->name
;
6810 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6812 buf
= XCDR (XCAR (tail
));
6813 /* Ignore buffers that aren't included in buffer lists. */
6814 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6817 *vecp
++ = XBUFFER (buf
)->read_only
;
6818 *vecp
++ = Fbuffer_modified_p (buf
);
6820 /* Fill up the vector with lambdas (always at least one). */
6822 while (vecp
- XVECTOR (state
)->contents
6823 < XVECTOR (state
)->size
)
6825 /* Make sure we didn't overflow the vector. */
6826 if (vecp
- XVECTOR (state
)->contents
6827 > XVECTOR (state
)->size
)
6834 /***********************************************************************
6836 ***********************************************************************/
6838 /* Initialization done when Emacs fork is started, before doing stty.
6839 Determine terminal type and set terminal_driver. Then invoke its
6840 decoding routine to set up variables in the terminal package. */
6845 char *terminal_type
;
6847 #ifdef HAVE_X_WINDOWS
6848 extern int display_arg
;
6851 /* Construct the space glyph. */
6852 space_glyph
.type
= CHAR_GLYPH
;
6853 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6854 space_glyph
.charpos
= -1;
6857 cursor_in_echo_area
= 0;
6858 terminal_type
= (char *) 0;
6860 /* Now is the time to initialize this; it's used by init_sys_modes
6862 Vinitial_window_system
= Qnil
;
6864 /* SIGWINCH needs to be handled no matter what display we start
6865 with. Otherwise newly opened tty frames will not resize
6870 #endif /* CANNOT_DUMP */
6871 signal (SIGWINCH
, window_change_signal
);
6872 #endif /* SIGWINCH */
6874 /* If running as a daemon, no need to initialize any frames/terminal. */
6878 /* If the user wants to use a window system, we shouldn't bother
6879 initializing the terminal. This is especially important when the
6880 terminal is so dumb that emacs gives up before and doesn't bother
6881 using the window system.
6883 If the DISPLAY environment variable is set and nonempty,
6884 try to use X, and die with an error message if that doesn't work. */
6886 #ifdef HAVE_X_WINDOWS
6887 if (! inhibit_window_system
&& ! display_arg
)
6890 display
= getenv ("DISPLAY");
6891 display_arg
= (display
!= 0 && *display
!= 0);
6893 if (display_arg
&& !x_display_ok (display
))
6895 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6897 inhibit_window_system
= 1;
6901 if (!inhibit_window_system
&& display_arg
6907 Vinitial_window_system
= Qx
;
6909 Vwindow_system_version
= make_number (11);
6911 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6912 /* In some versions of ncurses,
6913 tputs crashes if we have not called tgetent.
6915 { char b
[2044]; tgetent (b
, "xterm");}
6917 adjust_frame_glyphs_initially ();
6920 #endif /* HAVE_X_WINDOWS */
6923 if (!inhibit_window_system
)
6925 Vinitial_window_system
= Qw32
;
6926 Vwindow_system_version
= make_number (1);
6927 adjust_frame_glyphs_initially ();
6930 #endif /* HAVE_NTGUI */
6933 if (!inhibit_window_system
6939 Vinitial_window_system
= Qns
;
6940 Vwindow_system_version
= make_number(10);
6941 adjust_frame_glyphs_initially ();
6946 /* If no window system has been specified, try to use the terminal. */
6949 fatal ("standard input is not a tty");
6954 terminal_type
= "w32console";
6956 /* Look at the TERM variable. */
6957 terminal_type
= (char *) getenv ("TERM");
6961 #ifdef HAVE_WINDOW_SYSTEM
6962 if (! inhibit_window_system
)
6963 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6965 #endif /* HAVE_WINDOW_SYSTEM */
6966 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6972 struct frame
*f
= XFRAME (selected_frame
);
6974 /* Open a display on the controlling tty. */
6975 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6977 /* Convert the initial frame to use the new display. */
6978 if (f
->output_method
!= output_initial
)
6980 f
->output_method
= t
->type
;
6983 t
->reference_count
++;
6984 t
->display_info
.tty
->top_frame
= selected_frame
;
6985 change_frame_size (XFRAME (selected_frame
),
6986 FrameRows (t
->display_info
.tty
),
6987 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6989 /* Delete the initial terminal. */
6990 if (--initial_terminal
->reference_count
== 0
6991 && initial_terminal
->delete_terminal_hook
)
6992 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6994 /* Update frame parameters to reflect the new type. */
6995 Fmodify_frame_parameters
6996 (selected_frame
, Fcons (Fcons (Qtty_type
,
6997 Ftty_type (selected_frame
)), Qnil
));
6998 if (t
->display_info
.tty
->name
)
6999 Fmodify_frame_parameters (selected_frame
,
7000 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
7003 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
7008 struct frame
*sf
= SELECTED_FRAME ();
7009 int width
= FRAME_TOTAL_COLS (sf
);
7010 int height
= FRAME_LINES (sf
);
7012 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
7014 /* If these sizes are so big they cause overflow, just ignore the
7015 change. It's not clear what better we could do. */
7016 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
7017 fatal ("screen size %dx%d too big", width
, height
);
7020 adjust_frame_glyphs_initially ();
7021 calculate_costs (XFRAME (selected_frame
));
7023 /* Set up faces of the initial terminal frame of a dumped Emacs. */
7026 && NILP (Vinitial_window_system
))
7028 /* For the initial frame, we don't have any way of knowing what
7029 are the foreground and background colors of the terminal. */
7030 struct frame
*sf
= SELECTED_FRAME();
7032 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
7033 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
7034 call0 (intern ("tty-set-up-initial-frame-faces"));
7040 /***********************************************************************
7042 ***********************************************************************/
7044 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
7045 Sinternal_show_cursor
, 2, 2, 0,
7046 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
7047 WINDOW nil means use the selected window. SHOW non-nil means
7048 show a cursor in WINDOW in the next redisplay. SHOW nil means
7049 don't show a cursor. */)
7051 Lisp_Object window
, show
;
7053 /* Don't change cursor state while redisplaying. This could confuse
7055 if (!redisplaying_p
)
7058 window
= selected_window
;
7060 CHECK_WINDOW (window
);
7062 XWINDOW (window
)->cursor_off_p
= NILP (show
);
7069 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
7070 Sinternal_show_cursor_p
, 0, 1, 0,
7071 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
7072 WINDOW nil or omitted means report on the selected window. */)
7079 window
= selected_window
;
7081 CHECK_WINDOW (window
);
7083 w
= XWINDOW (window
);
7084 return w
->cursor_off_p
? Qnil
: Qt
;
7087 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
7088 Slast_nonminibuf_frame
, 0, 0, 0,
7089 doc
: /* Value is last nonminibuffer frame. */)
7092 Lisp_Object frame
= Qnil
;
7094 if (last_nonminibuf_frame
)
7095 XSETFRAME (frame
, last_nonminibuf_frame
);
7100 /***********************************************************************
7102 ***********************************************************************/
7107 defsubr (&Sredraw_frame
);
7108 defsubr (&Sredraw_display
);
7109 defsubr (&Sframe_or_buffer_changed_p
);
7110 defsubr (&Sopen_termscript
);
7112 defsubr (&Sredisplay
);
7113 defsubr (&Ssleep_for
);
7114 defsubr (&Ssend_string_to_terminal
);
7115 defsubr (&Sinternal_show_cursor
);
7116 defsubr (&Sinternal_show_cursor_p
);
7117 defsubr (&Slast_nonminibuf_frame
);
7120 defsubr (&Sdump_redisplay_history
);
7123 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
7124 staticpro (&frame_and_buffer_state
);
7126 Qdisplay_table
= intern_c_string ("display-table");
7127 staticpro (&Qdisplay_table
);
7128 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
7129 staticpro (&Qredisplay_dont_pause
);
7131 DEFVAR_INT ("baud-rate", &baud_rate
,
7132 doc
: /* *The output baud rate of the terminal.
7133 On most systems, changing this value will affect the amount of padding
7134 and the other strategic decisions made during redisplay. */);
7136 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7137 doc
: /* *Non-nil means invert the entire frame display.
7138 This means everything is in inverse video which otherwise would not be. */);
7140 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7141 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7143 See also `ring-bell-function'. */);
7145 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7146 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7147 A non-nil value is useful if the terminal can automatically preserve
7148 Emacs's frame display when you reenter Emacs.
7149 It is up to you to set this variable if your terminal can do that. */);
7151 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
7152 doc
: /* Name of the window system that Emacs uses for the first frame.
7153 The value is a symbol--for instance, `x' for X windows.
7154 The value is nil if Emacs is using a text-only terminal. */);
7156 DEFVAR_KBOARD ("window-system", Vwindow_system
,
7157 doc
: /* Name of window system through which the selected frame is displayed.
7158 The value is a symbol--for instance, `x' for X windows.
7159 The value is nil if the selected frame is on a text-only-terminal. */);
7161 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7162 doc
: /* The version number of the window system in use.
7163 For X windows, this is 11. */);
7165 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7166 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7168 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7169 doc
: /* Table defining how to output a glyph code to the frame.
7170 If not nil, this is a vector indexed by glyph code to define the glyph.
7171 Each element can be:
7172 integer: a glyph code which this glyph is an alias for.
7173 string: output this glyph using that string (not impl. in X windows).
7174 nil: this glyph mod 524288 is the code of a character to output,
7175 and this glyph / 524288 is the face number (see `face-id') to use
7176 while outputting it. */);
7177 Vglyph_table
= Qnil
;
7179 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7180 doc
: /* Display table to use for buffers that specify none.
7181 See `buffer-display-table' for more information. */);
7182 Vstandard_display_table
= Qnil
;
7184 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7185 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7186 redisplay_dont_pause
= 0;
7188 #if PERIODIC_PREEMPTION_CHECKING
7189 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7190 doc
: /* *The period in seconds between checking for input during redisplay.
7191 If input is detected, redisplay is pre-empted, and the input is processed.
7192 If nil, never pre-empt redisplay. */);
7193 Vredisplay_preemption_period
= make_float (0.10);
7200 Vinitial_window_system
= Qnil
;
7201 Vwindow_system_version
= Qnil
;
7205 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7206 (do not change this comment) */