1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static int showing_window_margins_p
P_ ((struct window
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
196 are supported, so we can check for input during redisplay at
197 regular intervals. */
198 #ifdef EMACS_HAS_USECS
199 #define PERIODIC_PREEMPTION_CHECKING 1
201 #define PERIODIC_PREEMPTION_CHECKING 0
204 #if PERIODIC_PREEMPTION_CHECKING
206 /* If a number (float), check for user input every N seconds. */
208 Lisp_Object Vredisplay_preemption_period
;
210 /* Redisplay preemption timers. */
212 static EMACS_TIME preemption_period
;
213 static EMACS_TIME preemption_next_check
;
217 /* Nonzero upon entry to redisplay means do not assume anything about
218 current contents of actual terminal frame; clear and redraw it. */
222 /* Nonzero means last display completed. Zero means it was preempted. */
224 int display_completed
;
226 /* Lisp variable visible-bell; enables use of screen-flash instead of
231 /* Invert the color of the whole frame, at a low level. */
235 /* Line speed of the terminal. */
239 /* Either nil or a symbol naming the window system under which Emacs
240 creates the first frame. */
242 Lisp_Object Vinitial_window_system
;
244 /* Version number of X windows: 10, 11 or nil. */
246 Lisp_Object Vwindow_system_version
;
248 /* Vector of glyph definitions. Indexed by glyph number, the contents
249 are a string which is how to output the glyph.
251 If Vglyph_table is nil, a glyph is output by using its low 8 bits
254 This is an obsolete feature that is no longer used. The variable
255 is retained for compatibility. */
257 Lisp_Object Vglyph_table
;
259 /* Display table to use for vectors that don't specify their own. */
261 Lisp_Object Vstandard_display_table
;
263 /* Nonzero means reading single-character input with prompt so put
264 cursor on mini-buffer after the prompt. Positive means at end of
265 text in echo area; negative means at beginning of line. */
267 int cursor_in_echo_area
;
269 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
272 /* The currently selected frame. In a single-frame version, this
273 variable always equals the_only_frame. */
275 Lisp_Object selected_frame
;
277 /* A frame which is not just a mini-buffer, or 0 if there are no such
278 frames. This is usually the most recent such frame that was
279 selected. In a single-frame version, this variable always holds
280 the address of the_only_frame. */
282 struct frame
*last_nonminibuf_frame
;
284 /* 1 means SIGWINCH happened when not safe. */
286 int delayed_size_change
;
288 /* 1 means glyph initialization has been completed at startup. */
290 static int glyphs_initialized_initially_p
;
292 /* Updated window if != 0. Set by update_window. */
294 struct window
*updated_window
;
296 /* Glyph row updated in update_window_line, and area that is updated. */
298 struct glyph_row
*updated_row
;
301 /* A glyph for a space. */
303 struct glyph space_glyph
;
305 /* Non-zero means update has been performed directly, so that there's
306 no need for redisplay_internal to do much work. Set by
307 direct_output_for_insert. */
309 int redisplay_performed_directly_p
;
311 /* Counts of allocated structures. These counts serve to diagnose
312 memory leaks and double frees. */
314 int glyph_matrix_count
;
315 int glyph_pool_count
;
317 /* If non-null, the frame whose frame matrices are manipulated. If
318 null, window matrices are worked on. */
320 static struct frame
*frame_matrix_frame
;
322 /* Non-zero means that fonts have been loaded since the last glyph
323 matrix adjustments. Redisplay must stop, and glyph matrices must
324 be adjusted when this flag becomes non-zero during display. The
325 reason fonts can be loaded so late is that fonts of fontsets are
326 loaded on demand. Another reason is that a line contains many
327 characters displayed by zero width or very narrow glyphs of
328 variable-width fonts. */
332 /* Convert vpos and hpos from frame to window and vice versa.
333 This may only be used for terminal frames. */
337 static int window_to_frame_vpos
P_ ((struct window
*, int));
338 static int window_to_frame_hpos
P_ ((struct window
*, int));
339 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
340 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
342 /* One element of the ring buffer containing redisplay history
345 struct redisplay_history
347 char trace
[512 + 100];
350 /* The size of the history buffer. */
352 #define REDISPLAY_HISTORY_SIZE 30
354 /* The redisplay history buffer. */
356 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
358 /* Next free entry in redisplay_history. */
360 static int history_idx
;
362 /* A tick that's incremented each time something is added to the
365 static unsigned history_tick
;
367 static void add_frame_display_history
P_ ((struct frame
*, int));
368 static void add_window_display_history
P_ ((struct window
*, char *, int));
370 /* Add to the redisplay history how window W has been displayed.
371 MSG is a trace containing the information how W's glyph matrix
372 has been constructed. PAUSED_P non-zero means that the update
373 has been interrupted for pending input. */
376 add_window_display_history (w
, msg
, paused_p
)
383 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
385 buf
= redisplay_history
[history_idx
].trace
;
388 sprintf (buf
, "%d: window %p (`%s')%s\n",
391 ((BUFFERP (w
->buffer
)
392 && STRINGP (XBUFFER (w
->buffer
)->name
))
393 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
395 paused_p
? " ***paused***" : "");
400 /* Add to the redisplay history that frame F has been displayed.
401 PAUSED_P non-zero means that the update has been interrupted for
405 add_frame_display_history (f
, paused_p
)
411 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
413 buf
= redisplay_history
[history_idx
].trace
;
416 sprintf (buf
, "%d: update frame %p%s",
418 f
, paused_p
? " ***paused***" : "");
422 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
423 Sdump_redisplay_history
, 0, 0, "",
424 doc
: /* Dump redisplay history to stderr. */)
429 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
432 i
= REDISPLAY_HISTORY_SIZE
- 1;
433 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
440 #else /* GLYPH_DEBUG == 0 */
442 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
443 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
445 #endif /* GLYPH_DEBUG == 0 */
448 /* Like bcopy except never gets confused by overlap. Let this be the
449 first function defined in this file, or change emacs.c where the
450 address of this function is used. */
453 safe_bcopy (from
, to
, size
)
458 if (size
<= 0 || from
== to
)
461 /* If the source and destination don't overlap, then bcopy can
462 handle it. If they do overlap, but the destination is lower in
463 memory than the source, we'll assume bcopy can handle that. */
464 if (to
< from
|| from
+ size
<= to
)
465 bcopy (from
, to
, size
);
467 /* Otherwise, we'll copy from the end. */
470 register const char *endf
= from
+ size
;
471 register char *endt
= to
+ size
;
473 /* If TO - FROM is large, then we should break the copy into
474 nonoverlapping chunks of TO - FROM bytes each. However, if
475 TO - FROM is small, then the bcopy function call overhead
476 makes this not worth it. The crossover point could be about
477 anywhere. Since I don't think the obvious copy loop is too
478 bad, I'm trying to err in its favor. */
483 while (endf
!= from
);
495 bcopy (endf
, endt
, to
- from
);
498 /* If SIZE wasn't a multiple of TO - FROM, there will be a
499 little left over. The amount left over is (endt + (to -
500 from)) - to, which is endt - from. */
501 bcopy (from
, to
, endt
- from
);
508 /***********************************************************************
510 ***********************************************************************/
512 /* Allocate and return a glyph_matrix structure. POOL is the glyph
513 pool from which memory for the matrix should be allocated, or null
514 for window-based redisplay where no glyph pools are used. The
515 member `pool' of the glyph matrix structure returned is set to
516 POOL, the structure is otherwise zeroed. */
518 struct glyph_matrix
*
519 new_glyph_matrix (pool
)
520 struct glyph_pool
*pool
;
522 struct glyph_matrix
*result
;
524 /* Allocate and clear. */
525 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
526 bzero (result
, sizeof *result
);
528 /* Increment number of allocated matrices. This count is used
529 to detect memory leaks. */
530 ++glyph_matrix_count
;
532 /* Set pool and return. */
538 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
540 The global counter glyph_matrix_count is decremented when a matrix
541 is freed. If the count gets negative, more structures were freed
542 than allocated, i.e. one matrix was freed more than once or a bogus
543 pointer was passed to this function.
545 If MATRIX->pool is null, this means that the matrix manages its own
546 glyph memory---this is done for matrices on X frames. Freeing the
547 matrix also frees the glyph memory in this case. */
550 free_glyph_matrix (matrix
)
551 struct glyph_matrix
*matrix
;
557 /* Detect the case that more matrices are freed than were
559 if (--glyph_matrix_count
< 0)
562 /* Free glyph memory if MATRIX owns it. */
563 if (matrix
->pool
== NULL
)
564 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
565 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
567 /* Free row structures and the matrix itself. */
568 xfree (matrix
->rows
);
574 /* Return the number of glyphs to reserve for a marginal area of
575 window W. TOTAL_GLYPHS is the number of glyphs in a complete
576 display line of window W. MARGIN gives the width of the marginal
577 area in canonical character units. MARGIN should be an integer
581 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
588 if (NUMBERP (margin
))
590 int width
= XFASTINT (w
->total_cols
);
591 double d
= max (0, XFLOATINT (margin
));
592 d
= min (width
/ 2 - 1, d
);
593 n
= (int) ((double) total_glyphs
/ width
* d
);
602 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
605 W is null if the function is called for a frame glyph matrix.
606 Otherwise it is the window MATRIX is a member of. X and Y are the
607 indices of the first column and row of MATRIX within the frame
608 matrix, if such a matrix exists. They are zero for purely
609 window-based redisplay. DIM is the needed size of the matrix.
611 In window-based redisplay, where no frame matrices exist, glyph
612 matrices manage their own glyph storage. Otherwise, they allocate
613 storage from a common frame glyph pool which can be found in
616 The reason for this memory management strategy is to avoid complete
617 frame redraws if possible. When we allocate from a common pool, a
618 change of the location or size of a sub-matrix within the pool
619 requires a complete redisplay of the frame because we cannot easily
620 make sure that the current matrices of all windows still agree with
621 what is displayed on the screen. While this is usually fast, it
622 leads to screen flickering. */
625 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
627 struct glyph_matrix
*matrix
;
633 int marginal_areas_changed_p
= 0;
634 int header_line_changed_p
= 0;
635 int header_line_p
= 0;
636 int left
= -1, right
= -1;
637 int window_width
= -1, window_height
= -1;
639 /* See if W had a header line that has disappeared now, or vice versa.
643 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
645 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
646 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
648 matrix
->header_line_p
= header_line_p
;
650 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
651 Do nothing if MATRIX' size, position, vscroll, and marginal areas
652 haven't changed. This optimization is important because preserving
653 the matrix means preventing redisplay. */
654 if (matrix
->pool
== NULL
)
656 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
657 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
658 xassert (left
>= 0 && right
>= 0);
659 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
660 || right
!= matrix
->right_margin_glyphs
);
662 if (!marginal_areas_changed_p
664 && !header_line_changed_p
665 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
666 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
667 && matrix
->window_height
== window_height
668 && matrix
->window_vscroll
== w
->vscroll
669 && matrix
->window_width
== window_width
)
673 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
674 if (matrix
->rows_allocated
< dim
.height
)
676 int size
= dim
.height
* sizeof (struct glyph_row
);
677 new_rows
= dim
.height
- matrix
->rows_allocated
;
678 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
679 bzero (matrix
->rows
+ matrix
->rows_allocated
,
680 new_rows
* sizeof *matrix
->rows
);
681 matrix
->rows_allocated
= dim
.height
;
686 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
687 on a frame not using window-based redisplay. Set up pointers for
688 each row into the glyph pool. */
691 xassert (matrix
->pool
->glyphs
);
695 left
= margin_glyphs_to_reserve (w
, dim
.width
,
696 w
->left_margin_cols
);
697 right
= margin_glyphs_to_reserve (w
, dim
.width
,
698 w
->right_margin_cols
);
703 for (i
= 0; i
< dim
.height
; ++i
)
705 struct glyph_row
*row
= &matrix
->rows
[i
];
707 row
->glyphs
[LEFT_MARGIN_AREA
]
708 = (matrix
->pool
->glyphs
709 + (y
+ i
) * matrix
->pool
->ncolumns
713 || row
== matrix
->rows
+ dim
.height
- 1
714 || (row
== matrix
->rows
&& matrix
->header_line_p
))
716 row
->glyphs
[TEXT_AREA
]
717 = row
->glyphs
[LEFT_MARGIN_AREA
];
718 row
->glyphs
[RIGHT_MARGIN_AREA
]
719 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
720 row
->glyphs
[LAST_AREA
]
721 = row
->glyphs
[RIGHT_MARGIN_AREA
];
725 row
->glyphs
[TEXT_AREA
]
726 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
727 row
->glyphs
[RIGHT_MARGIN_AREA
]
728 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
729 row
->glyphs
[LAST_AREA
]
730 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
734 matrix
->left_margin_glyphs
= left
;
735 matrix
->right_margin_glyphs
= right
;
739 /* If MATRIX->pool is null, MATRIX is responsible for managing
740 its own memory. It is a window matrix for window-based redisplay.
741 Allocate glyph memory from the heap. */
742 if (dim
.width
> matrix
->matrix_w
744 || header_line_changed_p
745 || marginal_areas_changed_p
)
747 struct glyph_row
*row
= matrix
->rows
;
748 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
752 row
->glyphs
[LEFT_MARGIN_AREA
]
753 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
755 * sizeof (struct glyph
)));
757 /* The mode line never has marginal areas. */
758 if (row
== matrix
->rows
+ dim
.height
- 1
759 || (row
== matrix
->rows
&& matrix
->header_line_p
))
761 row
->glyphs
[TEXT_AREA
]
762 = row
->glyphs
[LEFT_MARGIN_AREA
];
763 row
->glyphs
[RIGHT_MARGIN_AREA
]
764 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
765 row
->glyphs
[LAST_AREA
]
766 = row
->glyphs
[RIGHT_MARGIN_AREA
];
770 row
->glyphs
[TEXT_AREA
]
771 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
772 row
->glyphs
[RIGHT_MARGIN_AREA
]
773 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
774 row
->glyphs
[LAST_AREA
]
775 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
781 xassert (left
>= 0 && right
>= 0);
782 matrix
->left_margin_glyphs
= left
;
783 matrix
->right_margin_glyphs
= right
;
786 /* Number of rows to be used by MATRIX. */
787 matrix
->nrows
= dim
.height
;
788 xassert (matrix
->nrows
>= 0);
792 if (matrix
== w
->current_matrix
)
794 /* Mark rows in a current matrix of a window as not having
795 valid contents. It's important to not do this for
796 desired matrices. When Emacs starts, it may already be
797 building desired matrices when this function runs. */
798 if (window_width
< 0)
799 window_width
= window_box_width (w
, -1);
801 /* Optimize the case that only the height has changed (C-x 2,
802 upper window). Invalidate all rows that are no longer part
804 if (!marginal_areas_changed_p
805 && !header_line_changed_p
807 && dim
.width
== matrix
->matrix_w
808 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
809 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
810 && matrix
->window_width
== window_width
)
812 /* Find the last row in the window. */
813 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
814 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
820 /* Window end is invalid, if inside of the rows that
821 are invalidated below. */
822 if (INTEGERP (w
->window_end_vpos
)
823 && XFASTINT (w
->window_end_vpos
) >= i
)
824 w
->window_end_valid
= Qnil
;
826 while (i
< matrix
->nrows
)
827 matrix
->rows
[i
++].enabled_p
= 0;
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
835 else if (matrix
== w
->desired_matrix
)
837 /* Rows in desired matrices always have to be cleared;
838 redisplay expects this is the case when it runs, so it
839 had better be the case when we adjust matrices between
841 for (i
= 0; i
< matrix
->nrows
; ++i
)
842 matrix
->rows
[i
].enabled_p
= 0;
847 /* Remember last values to be able to optimize frame redraws. */
848 matrix
->matrix_x
= x
;
849 matrix
->matrix_y
= y
;
850 matrix
->matrix_w
= dim
.width
;
851 matrix
->matrix_h
= dim
.height
;
853 /* Record the top y location and height of W at the time the matrix
854 was last adjusted. This is used to optimize redisplay above. */
857 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
858 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
859 matrix
->window_height
= window_height
;
860 matrix
->window_width
= window_width
;
861 matrix
->window_vscroll
= w
->vscroll
;
866 /* Reverse the contents of rows in MATRIX between START and END. The
867 contents of the row at END - 1 end up at START, END - 2 at START +
868 1 etc. This is part of the implementation of rotate_matrix (see
872 reverse_rows (matrix
, start
, end
)
873 struct glyph_matrix
*matrix
;
878 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
880 /* Non-ISO HP/UX compiler doesn't like auto struct
882 struct glyph_row temp
;
883 temp
= matrix
->rows
[i
];
884 matrix
->rows
[i
] = matrix
->rows
[j
];
885 matrix
->rows
[j
] = temp
;
890 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
891 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
892 indices. (Note: this does not copy glyphs, only glyph pointers in
893 row structures are moved around).
895 The algorithm used for rotating the vector was, I believe, first
896 described by Kernighan. See the vector R as consisting of two
897 sub-vectors AB, where A has length BY for BY >= 0. The result
898 after rotating is then BA. Reverse both sub-vectors to get ArBr
899 and reverse the result to get (ArBr)r which is BA. Similar for
903 rotate_matrix (matrix
, first
, last
, by
)
904 struct glyph_matrix
*matrix
;
909 /* Up (rotate left, i.e. towards lower indices). */
911 reverse_rows (matrix
, first
, first
+ by
);
912 reverse_rows (matrix
, first
+ by
, last
);
913 reverse_rows (matrix
, first
, last
);
917 /* Down (rotate right, i.e. towards higher indices). */
918 reverse_rows (matrix
, last
- by
, last
);
919 reverse_rows (matrix
, first
, last
- by
);
920 reverse_rows (matrix
, first
, last
);
925 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
926 with indices START <= index < END. Increment positions by DELTA/
930 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
931 struct glyph_matrix
*matrix
;
932 int start
, end
, delta
, delta_bytes
;
934 /* Check that START and END are reasonable values. */
935 xassert (start
>= 0 && start
<= matrix
->nrows
);
936 xassert (end
>= 0 && end
<= matrix
->nrows
);
937 xassert (start
<= end
);
939 for (; start
< end
; ++start
)
940 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
944 /* Enable a range of rows in glyph matrix MATRIX. START and END are
945 the row indices of the first and last + 1 row to enable. If
946 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
949 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
950 struct glyph_matrix
*matrix
;
954 xassert (start
<= end
);
955 xassert (start
>= 0 && start
< matrix
->nrows
);
956 xassert (end
>= 0 && end
<= matrix
->nrows
);
958 for (; start
< end
; ++start
)
959 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
965 This empties all rows in MATRIX by setting the enabled_p flag for
966 all rows of the matrix to zero. The function prepare_desired_row
967 will eventually really clear a row when it sees one with a zero
970 Resets update hints to defaults value. The only update hint
971 currently present is the flag MATRIX->no_scrolling_p. */
974 clear_glyph_matrix (matrix
)
975 struct glyph_matrix
*matrix
;
979 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
980 matrix
->no_scrolling_p
= 0;
985 /* Shift part of the glyph matrix MATRIX of window W up or down.
986 Increment y-positions in glyph rows between START and END by DY,
987 and recompute their visible height. */
990 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
992 struct glyph_matrix
*matrix
;
997 xassert (start
<= end
);
998 xassert (start
>= 0 && start
< matrix
->nrows
);
999 xassert (end
>= 0 && end
<= matrix
->nrows
);
1001 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1002 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1004 for (; start
< end
; ++start
)
1006 struct glyph_row
*row
= &matrix
->rows
[start
];
1009 row
->visible_height
= row
->height
;
1012 row
->visible_height
-= min_y
- row
->y
;
1013 if (row
->y
+ row
->height
> max_y
)
1014 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1019 /* Mark all rows in current matrices of frame F as invalid. Marking
1020 invalid is done by setting enabled_p to zero for all rows in a
1024 clear_current_matrices (f
)
1025 register struct frame
*f
;
1027 /* Clear frame current matrix, if we have one. */
1028 if (f
->current_matrix
)
1029 clear_glyph_matrix (f
->current_matrix
);
1031 /* Clear the matrix of the menu bar window, if such a window exists.
1032 The menu bar window is currently used to display menus on X when
1033 no toolkit support is compiled in. */
1034 if (WINDOWP (f
->menu_bar_window
))
1035 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1037 /* Clear the matrix of the tool-bar window, if any. */
1038 if (WINDOWP (f
->tool_bar_window
))
1039 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1041 /* Clear current window matrices. */
1042 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1043 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1047 /* Clear out all display lines of F for a coming redisplay. */
1050 clear_desired_matrices (f
)
1051 register struct frame
*f
;
1053 if (f
->desired_matrix
)
1054 clear_glyph_matrix (f
->desired_matrix
);
1056 if (WINDOWP (f
->menu_bar_window
))
1057 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1059 if (WINDOWP (f
->tool_bar_window
))
1060 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1062 /* Do it for window matrices. */
1063 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1064 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1068 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1069 non-zero clear desired matrices, otherwise clear current matrices. */
1072 clear_window_matrices (w
, desired_p
)
1078 if (!NILP (w
->hchild
))
1080 xassert (WINDOWP (w
->hchild
));
1081 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1083 else if (!NILP (w
->vchild
))
1085 xassert (WINDOWP (w
->vchild
));
1086 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1091 clear_glyph_matrix (w
->desired_matrix
);
1094 clear_glyph_matrix (w
->current_matrix
);
1095 w
->window_end_valid
= Qnil
;
1099 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1105 /***********************************************************************
1108 See dispextern.h for an overall explanation of glyph rows.
1109 ***********************************************************************/
1111 /* Clear glyph row ROW. Do it in a way that makes it robust against
1112 changes in the glyph_row structure, i.e. addition or removal of
1113 structure members. */
1115 static struct glyph_row null_row
;
1118 clear_glyph_row (row
)
1119 struct glyph_row
*row
;
1121 struct glyph
*p
[1 + LAST_AREA
];
1123 /* Save pointers. */
1124 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1125 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1126 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1127 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1132 /* Restore pointers. */
1133 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1134 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1135 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1136 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1138 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1139 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1140 Redisplay outputs such glyphs, and flickering effects were
1141 the result. This also depended on the contents of memory
1142 returned by xmalloc. If flickering happens again, activate
1143 the code below. If the flickering is gone with that, chances
1144 are that the flickering has the same reason as here. */
1145 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1150 /* Make ROW an empty, enabled row of canonical character height,
1151 in window W starting at y-position Y. */
1154 blank_row (w
, row
, y
)
1156 struct glyph_row
*row
;
1161 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1162 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1164 clear_glyph_row (row
);
1166 row
->ascent
= row
->phys_ascent
= 0;
1167 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1168 row
->visible_height
= row
->height
;
1171 row
->visible_height
-= min_y
- row
->y
;
1172 if (row
->y
+ row
->height
> max_y
)
1173 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1179 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1180 are the amounts by which to change positions. Note that the first
1181 glyph of the text area of a row can have a buffer position even if
1182 the used count of the text area is zero. Such rows display line
1186 increment_row_positions (row
, delta
, delta_bytes
)
1187 struct glyph_row
*row
;
1188 int delta
, delta_bytes
;
1192 /* Increment start and end positions. */
1193 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1194 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1195 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1196 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1198 if (!row
->enabled_p
)
1201 /* Increment positions in glyphs. */
1202 for (area
= 0; area
< LAST_AREA
; ++area
)
1203 for (i
= 0; i
< row
->used
[area
]; ++i
)
1204 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1205 && row
->glyphs
[area
][i
].charpos
> 0)
1206 row
->glyphs
[area
][i
].charpos
+= delta
;
1208 /* Capture the case of rows displaying a line end. */
1209 if (row
->used
[TEXT_AREA
] == 0
1210 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1211 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1216 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1217 contents, i.e. glyph structure contents are exchanged between A and
1218 B without changing glyph pointers in A and B. */
1221 swap_glyphs_in_rows (a
, b
)
1222 struct glyph_row
*a
, *b
;
1226 for (area
= 0; area
< LAST_AREA
; ++area
)
1228 /* Number of glyphs to swap. */
1229 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1231 /* Start of glyphs in area of row A. */
1232 struct glyph
*glyph_a
= a
->glyphs
[area
];
1234 /* End + 1 of glyphs in area of row A. */
1235 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1237 /* Start of glyphs in area of row B. */
1238 struct glyph
*glyph_b
= b
->glyphs
[area
];
1240 while (glyph_a
< glyph_a_end
)
1242 /* Non-ISO HP/UX compiler doesn't like auto struct
1246 *glyph_a
= *glyph_b
;
1256 /* Exchange pointers to glyph memory between glyph rows A and B. */
1259 swap_glyph_pointers (a
, b
)
1260 struct glyph_row
*a
, *b
;
1263 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1265 struct glyph
*temp
= a
->glyphs
[i
];
1266 a
->glyphs
[i
] = b
->glyphs
[i
];
1267 b
->glyphs
[i
] = temp
;
1272 /* Copy glyph row structure FROM to glyph row structure TO, except
1273 that glyph pointers in the structures are left unchanged. */
1276 copy_row_except_pointers (to
, from
)
1277 struct glyph_row
*to
, *from
;
1279 struct glyph
*pointers
[1 + LAST_AREA
];
1281 /* Save glyph pointers of TO. */
1282 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1284 /* Do a structure assignment. */
1287 /* Restore original pointers of TO. */
1288 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1292 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1293 TO and FROM are left unchanged. Glyph contents are copied from the
1294 glyph memory of FROM to the glyph memory of TO. Increment buffer
1295 positions in row TO by DELTA/ DELTA_BYTES. */
1298 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1299 struct glyph_row
*to
, *from
;
1300 int delta
, delta_bytes
;
1304 /* This is like a structure assignment TO = FROM, except that
1305 glyph pointers in the rows are left unchanged. */
1306 copy_row_except_pointers (to
, from
);
1308 /* Copy glyphs from FROM to TO. */
1309 for (area
= 0; area
< LAST_AREA
; ++area
)
1310 if (from
->used
[area
])
1311 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1312 from
->used
[area
] * sizeof (struct glyph
));
1314 /* Increment buffer positions in TO by DELTA. */
1315 increment_row_positions (to
, delta
, delta_bytes
);
1319 /* Assign glyph row FROM to glyph row TO. This works like a structure
1320 assignment TO = FROM, except that glyph pointers are not copied but
1321 exchanged between TO and FROM. Pointers must be exchanged to avoid
1325 assign_row (to
, from
)
1326 struct glyph_row
*to
, *from
;
1328 swap_glyph_pointers (to
, from
);
1329 copy_row_except_pointers (to
, from
);
1333 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1334 a row in a window matrix, is a slice of the glyph memory of the
1335 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1336 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1337 memory of FRAME_ROW. */
1342 glyph_row_slice_p (window_row
, frame_row
)
1343 struct glyph_row
*window_row
, *frame_row
;
1345 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1346 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1347 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1349 return (frame_glyph_start
<= window_glyph_start
1350 && window_glyph_start
< frame_glyph_end
);
1353 #endif /* GLYPH_DEBUG */
1357 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1358 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1359 in WINDOW_MATRIX is found satisfying the condition. */
1361 static struct glyph_row
*
1362 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1363 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1368 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1370 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1371 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1372 frame_matrix
->rows
+ row
))
1375 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1380 /* Prepare ROW for display. Desired rows are cleared lazily,
1381 i.e. they are only marked as to be cleared by setting their
1382 enabled_p flag to zero. When a row is to be displayed, a prior
1383 call to this function really clears it. */
1386 prepare_desired_row (row
)
1387 struct glyph_row
*row
;
1389 if (!row
->enabled_p
)
1391 clear_glyph_row (row
);
1397 /* Return a hash code for glyph row ROW. */
1400 line_hash_code (row
)
1401 struct glyph_row
*row
;
1407 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1408 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1412 int c
= glyph
->u
.ch
;
1413 int face_id
= glyph
->face_id
;
1414 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1416 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1417 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1429 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1430 the number of characters in the line. If must_write_spaces is
1431 zero, leading and trailing spaces are ignored. */
1434 line_draw_cost (matrix
, vpos
)
1435 struct glyph_matrix
*matrix
;
1438 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1439 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1440 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1442 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1443 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1445 /* Ignore trailing and leading spaces if we can. */
1446 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1448 /* Skip from the end over trailing spaces. */
1449 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1452 /* All blank line. */
1456 /* Skip over leading spaces. */
1457 while (CHAR_GLYPH_SPACE_P (*beg
))
1461 /* If we don't have a glyph-table, each glyph is one character,
1462 so return the number of glyphs. */
1463 if (glyph_table_base
== 0)
1467 /* Otherwise, scan the glyphs and accumulate their total length
1474 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1476 if (GLYPH_INVALID_P (g
)
1477 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1480 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1490 /* Test two glyph rows A and B for equality. Value is non-zero if A
1491 and B have equal contents. W is the window to which the glyphs
1492 rows A and B belong. It is needed here to test for partial row
1493 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1494 flags of A and B, too. */
1497 row_equal_p (w
, a
, b
, mouse_face_p
)
1499 struct glyph_row
*a
, *b
;
1504 else if (a
->hash
!= b
->hash
)
1508 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1511 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1514 /* Compare glyphs. */
1515 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1517 if (a
->used
[area
] != b
->used
[area
])
1520 a_glyph
= a
->glyphs
[area
];
1521 a_end
= a_glyph
+ a
->used
[area
];
1522 b_glyph
= b
->glyphs
[area
];
1524 while (a_glyph
< a_end
1525 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1526 ++a_glyph
, ++b_glyph
;
1528 if (a_glyph
!= a_end
)
1532 if (a
->fill_line_p
!= b
->fill_line_p
1533 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1534 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1535 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1536 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1537 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1538 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1539 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1540 || a
->overlapped_p
!= b
->overlapped_p
1541 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1542 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1543 /* Different partially visible characters on left margin. */
1545 /* Different height. */
1546 || a
->ascent
!= b
->ascent
1547 || a
->phys_ascent
!= b
->phys_ascent
1548 || a
->phys_height
!= b
->phys_height
1549 || a
->visible_height
!= b
->visible_height
)
1558 /***********************************************************************
1561 See dispextern.h for an overall explanation of glyph pools.
1562 ***********************************************************************/
1564 /* Allocate a glyph_pool structure. The structure returned is
1565 initialized with zeros. The global variable glyph_pool_count is
1566 incremented for each pool allocated. */
1568 static struct glyph_pool
*
1571 struct glyph_pool
*result
;
1573 /* Allocate a new glyph_pool and clear it. */
1574 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1575 bzero (result
, sizeof *result
);
1577 /* For memory leak and double deletion checking. */
1584 /* Free a glyph_pool structure POOL. The function may be called with
1585 a null POOL pointer. The global variable glyph_pool_count is
1586 decremented with every pool structure freed. If this count gets
1587 negative, more structures were freed than allocated, i.e. one
1588 structure must have been freed more than once or a bogus pointer
1589 was passed to free_glyph_pool. */
1592 free_glyph_pool (pool
)
1593 struct glyph_pool
*pool
;
1597 /* More freed than allocated? */
1599 xassert (glyph_pool_count
>= 0);
1601 xfree (pool
->glyphs
);
1607 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1608 columns we need. This function never shrinks a pool. The only
1609 case in which this would make sense, would be when a frame's size
1610 is changed from a large value to a smaller one. But, if someone
1611 does it once, we can expect that he will do it again.
1613 Value is non-zero if the pool changed in a way which makes
1614 re-adjusting window glyph matrices necessary. */
1617 realloc_glyph_pool (pool
, matrix_dim
)
1618 struct glyph_pool
*pool
;
1619 struct dim matrix_dim
;
1624 changed_p
= (pool
->glyphs
== 0
1625 || matrix_dim
.height
!= pool
->nrows
1626 || matrix_dim
.width
!= pool
->ncolumns
);
1628 /* Enlarge the glyph pool. */
1629 needed
= matrix_dim
.width
* matrix_dim
.height
;
1630 if (needed
> pool
->nglyphs
)
1632 int size
= needed
* sizeof (struct glyph
);
1635 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1638 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1639 bzero (pool
->glyphs
, size
);
1642 pool
->nglyphs
= needed
;
1645 /* Remember the number of rows and columns because (a) we use them
1646 to do sanity checks, and (b) the number of columns determines
1647 where rows in the frame matrix start---this must be available to
1648 determine pointers to rows of window sub-matrices. */
1649 pool
->nrows
= matrix_dim
.height
;
1650 pool
->ncolumns
= matrix_dim
.width
;
1657 /***********************************************************************
1659 ***********************************************************************/
1664 /* Flush standard output. This is sometimes useful to call from the debugger.
1665 XXX Maybe this should be changed to flush the current terminal instead of
1676 /* Check that no glyph pointers have been lost in MATRIX. If a
1677 pointer has been lost, e.g. by using a structure assignment between
1678 rows, at least one pointer must occur more than once in the rows of
1682 check_matrix_pointer_lossage (matrix
)
1683 struct glyph_matrix
*matrix
;
1687 for (i
= 0; i
< matrix
->nrows
; ++i
)
1688 for (j
= 0; j
< matrix
->nrows
; ++j
)
1690 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1691 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1695 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1698 matrix_row (matrix
, row
)
1699 struct glyph_matrix
*matrix
;
1702 xassert (matrix
&& matrix
->rows
);
1703 xassert (row
>= 0 && row
< matrix
->nrows
);
1705 /* That's really too slow for normal testing because this function
1706 is called almost everywhere. Although---it's still astonishingly
1707 fast, so it is valuable to have for debugging purposes. */
1709 check_matrix_pointer_lossage (matrix
);
1712 return matrix
->rows
+ row
;
1716 #if 0 /* This function makes invalid assumptions when text is
1717 partially invisible. But it might come handy for debugging
1720 /* Check invariants that must hold for an up to date current matrix of
1724 check_matrix_invariants (w
)
1727 struct glyph_matrix
*matrix
= w
->current_matrix
;
1728 int yb
= window_text_bottom_y (w
);
1729 struct glyph_row
*row
= matrix
->rows
;
1730 struct glyph_row
*last_text_row
= NULL
;
1731 struct buffer
*saved
= current_buffer
;
1732 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1735 /* This can sometimes happen for a fresh window. */
1736 if (matrix
->nrows
< 2)
1739 set_buffer_temp (buffer
);
1741 /* Note: last row is always reserved for the mode line. */
1742 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1743 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1745 struct glyph_row
*next
= row
+ 1;
1747 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1748 last_text_row
= row
;
1750 /* Check that character and byte positions are in sync. */
1751 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1752 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1754 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1755 have such a position temporarily in case of a minibuffer
1756 displaying something like `[Sole completion]' at its end. */
1757 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1758 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1759 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1761 /* Check that end position of `row' is equal to start position
1763 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1765 xassert (MATRIX_ROW_END_CHARPOS (row
)
1766 == MATRIX_ROW_START_CHARPOS (next
));
1767 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1768 == MATRIX_ROW_START_BYTEPOS (next
));
1773 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1774 xassert (w
->desired_matrix
->rows
!= NULL
);
1775 set_buffer_temp (saved
);
1780 #endif /* GLYPH_DEBUG != 0 */
1784 /**********************************************************************
1785 Allocating/ Adjusting Glyph Matrices
1786 **********************************************************************/
1788 /* Allocate glyph matrices over a window tree for a frame-based
1791 X and Y are column/row within the frame glyph matrix where
1792 sub-matrices for the window tree rooted at WINDOW must be
1793 allocated. DIM_ONLY_P non-zero means that the caller of this
1794 function is only interested in the result matrix dimension, and
1795 matrix adjustments should not be performed.
1797 The function returns the total width/height of the sub-matrices of
1798 the window tree. If called on a frame root window, the computation
1799 will take the mini-buffer window into account.
1801 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1803 NEW_LEAF_MATRIX set if any window in the tree did not have a
1804 glyph matrices yet, and
1806 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1807 any window in the tree will be changed or have been changed (see
1810 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1813 Windows are arranged into chains of windows on the same level
1814 through the next fields of window structures. Such a level can be
1815 either a sequence of horizontally adjacent windows from left to
1816 right, or a sequence of vertically adjacent windows from top to
1817 bottom. Each window in a horizontal sequence can be either a leaf
1818 window or a vertical sequence; a window in a vertical sequence can
1819 be either a leaf or a horizontal sequence. All windows in a
1820 horizontal sequence have the same height, and all windows in a
1821 vertical sequence have the same width.
1823 This function uses, for historical reasons, a more general
1824 algorithm to determine glyph matrix dimensions that would be
1827 The matrix height of a horizontal sequence is determined by the
1828 maximum height of any matrix in the sequence. The matrix width of
1829 a horizontal sequence is computed by adding up matrix widths of
1830 windows in the sequence.
1832 |<------- result width ------->|
1833 +---------+----------+---------+ ---
1836 +---------+ | | result height
1841 The matrix width of a vertical sequence is the maximum matrix width
1842 of any window in the sequence. Its height is computed by adding up
1843 matrix heights of windows in the sequence.
1845 |<---- result width -->|
1853 +------------+---------+ |
1856 +------------+---------+ --- */
1858 /* Bit indicating that a new matrix will be allocated or has been
1861 #define NEW_LEAF_MATRIX (1 << 0)
1863 /* Bit indicating that a matrix will or has changed its location or
1866 #define CHANGED_LEAF_MATRIX (1 << 1)
1869 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1870 window_change_flags
)
1874 int *window_change_flags
;
1876 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1878 int wmax
= 0, hmax
= 0;
1882 int in_horz_combination_p
;
1884 /* What combination is WINDOW part of? Compute this once since the
1885 result is the same for all windows in the `next' chain. The
1886 special case of a root window (parent equal to nil) is treated
1887 like a vertical combination because a root window's `next'
1888 points to the mini-buffer window, if any, which is arranged
1889 vertically below other windows. */
1890 in_horz_combination_p
1891 = (!NILP (XWINDOW (window
)->parent
)
1892 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1894 /* For WINDOW and all windows on the same level. */
1897 w
= XWINDOW (window
);
1899 /* Get the dimension of the window sub-matrix for W, depending
1900 on whether this is a combination or a leaf window. */
1901 if (!NILP (w
->hchild
))
1902 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1904 window_change_flags
);
1905 else if (!NILP (w
->vchild
))
1906 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1908 window_change_flags
);
1911 /* If not already done, allocate sub-matrix structures. */
1912 if (w
->desired_matrix
== NULL
)
1914 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1915 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1916 *window_change_flags
|= NEW_LEAF_MATRIX
;
1919 /* Width and height MUST be chosen so that there are no
1920 holes in the frame matrix. */
1921 dim
.width
= required_matrix_width (w
);
1922 dim
.height
= required_matrix_height (w
);
1924 /* Will matrix be re-allocated? */
1925 if (x
!= w
->desired_matrix
->matrix_x
1926 || y
!= w
->desired_matrix
->matrix_y
1927 || dim
.width
!= w
->desired_matrix
->matrix_w
1928 || dim
.height
!= w
->desired_matrix
->matrix_h
1929 || (margin_glyphs_to_reserve (w
, dim
.width
,
1930 w
->left_margin_cols
)
1931 != w
->desired_matrix
->left_margin_glyphs
)
1932 || (margin_glyphs_to_reserve (w
, dim
.width
,
1933 w
->right_margin_cols
)
1934 != w
->desired_matrix
->right_margin_glyphs
))
1935 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1937 /* Actually change matrices, if allowed. Do not consider
1938 CHANGED_LEAF_MATRIX computed above here because the pool
1939 may have been changed which we don't now here. We trust
1940 that we only will be called with DIM_ONLY_P != 0 when
1944 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1945 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1949 /* If we are part of a horizontal combination, advance x for
1950 windows to the right of W; otherwise advance y for windows
1952 if (in_horz_combination_p
)
1957 /* Remember maximum glyph matrix dimensions. */
1958 wmax
= max (wmax
, dim
.width
);
1959 hmax
= max (hmax
, dim
.height
);
1961 /* Next window on same level. */
1964 while (!NILP (window
));
1966 /* Set `total' to the total glyph matrix dimension of this window
1967 level. In a vertical combination, the width is the width of the
1968 widest window; the height is the y we finally reached, corrected
1969 by the y we started with. In a horizontal combination, the total
1970 height is the height of the tallest window, and the width is the
1971 x we finally reached, corrected by the x we started with. */
1972 if (in_horz_combination_p
)
1974 total
.width
= x
- x0
;
1975 total
.height
= hmax
;
1980 total
.height
= y
- y0
;
1987 /* Return the required height of glyph matrices for window W. */
1990 required_matrix_height (w
)
1993 #ifdef HAVE_WINDOW_SYSTEM
1994 struct frame
*f
= XFRAME (w
->frame
);
1996 if (FRAME_WINDOW_P (f
))
1998 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1999 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
2000 return (((window_pixel_height
+ ch_height
- 1)
2001 / ch_height
) * w
->nrows_scale_factor
2002 /* One partially visible line at the top and
2003 bottom of the window. */
2005 /* 2 for header and mode line. */
2008 #endif /* HAVE_WINDOW_SYSTEM */
2010 return WINDOW_TOTAL_LINES (w
);
2014 /* Return the required width of glyph matrices for window W. */
2017 required_matrix_width (w
)
2020 #ifdef HAVE_WINDOW_SYSTEM
2021 struct frame
*f
= XFRAME (w
->frame
);
2022 if (FRAME_WINDOW_P (f
))
2024 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2025 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2027 /* Compute number of glyphs needed in a glyph row. */
2028 return (((window_pixel_width
+ ch_width
- 1)
2029 / ch_width
) * w
->ncols_scale_factor
2030 /* 2 partially visible columns in the text area. */
2032 /* One partially visible column at the right
2033 edge of each marginal area. */
2036 #endif /* HAVE_WINDOW_SYSTEM */
2038 return XINT (w
->total_cols
);
2042 /* Allocate window matrices for window-based redisplay. W is the
2043 window whose matrices must be allocated/reallocated. */
2046 allocate_matrices_for_window_redisplay (w
)
2051 if (!NILP (w
->vchild
))
2052 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2053 else if (!NILP (w
->hchild
))
2054 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2057 /* W is a leaf window. */
2060 /* If matrices are not yet allocated, allocate them now. */
2061 if (w
->desired_matrix
== NULL
)
2063 w
->desired_matrix
= new_glyph_matrix (NULL
);
2064 w
->current_matrix
= new_glyph_matrix (NULL
);
2067 dim
.width
= required_matrix_width (w
);
2068 dim
.height
= required_matrix_height (w
);
2069 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2070 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2073 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2078 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2079 do it for all frames; otherwise do it just for the given frame.
2080 This function must be called when a new frame is created, its size
2081 changes, or its window configuration changes. */
2087 /* Block input so that expose events and other events that access
2088 glyph matrices are not processed while we are changing them. */
2092 adjust_frame_glyphs (f
);
2095 Lisp_Object tail
, lisp_frame
;
2097 FOR_EACH_FRAME (tail
, lisp_frame
)
2098 adjust_frame_glyphs (XFRAME (lisp_frame
));
2105 /* Adjust frame glyphs when Emacs is initialized.
2107 To be called from init_display.
2109 We need a glyph matrix because redraw will happen soon.
2110 Unfortunately, window sizes on selected_frame are not yet set to
2111 meaningful values. I believe we can assume that there are only two
2112 windows on the frame---the mini-buffer and the root window. Frame
2113 height and width seem to be correct so far. So, set the sizes of
2114 windows to estimated values. */
2117 adjust_frame_glyphs_initially ()
2119 struct frame
*sf
= SELECTED_FRAME ();
2120 struct window
*root
= XWINDOW (sf
->root_window
);
2121 struct window
*mini
= XWINDOW (root
->next
);
2122 int frame_lines
= FRAME_LINES (sf
);
2123 int frame_cols
= FRAME_COLS (sf
);
2124 int top_margin
= FRAME_TOP_MARGIN (sf
);
2126 /* Do it for the root window. */
2127 XSETFASTINT (root
->top_line
, top_margin
);
2128 XSETFASTINT (root
->total_cols
, frame_cols
);
2129 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2131 /* Do it for the mini-buffer window. */
2132 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2133 XSETFASTINT (mini
->total_cols
, frame_cols
);
2134 set_window_height (root
->next
, 1, 0);
2136 adjust_frame_glyphs (sf
);
2137 glyphs_initialized_initially_p
= 1;
2141 /* Allocate/reallocate glyph matrices of a single frame F. */
2144 adjust_frame_glyphs (f
)
2147 if (FRAME_WINDOW_P (f
))
2148 adjust_frame_glyphs_for_window_redisplay (f
);
2150 adjust_frame_glyphs_for_frame_redisplay (f
);
2152 /* Don't forget the message buffer and the buffer for
2153 decode_mode_spec. */
2154 adjust_frame_message_buffer (f
);
2155 adjust_decode_mode_spec_buffer (f
);
2157 f
->glyphs_initialized_p
= 1;
2160 /* Return 1 if any window in the tree has nonzero window margins. See
2161 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2163 showing_window_margins_p (w
)
2168 if (!NILP (w
->hchild
))
2170 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2173 else if (!NILP (w
->vchild
))
2175 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2178 else if (!NILP (w
->left_margin_cols
)
2179 || !NILP (w
->right_margin_cols
))
2182 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2188 /* In the window tree with root W, build current matrices of leaf
2189 windows from the frame's current matrix. */
2192 fake_current_matrices (window
)
2197 for (; !NILP (window
); window
= w
->next
)
2199 w
= XWINDOW (window
);
2201 if (!NILP (w
->hchild
))
2202 fake_current_matrices (w
->hchild
);
2203 else if (!NILP (w
->vchild
))
2204 fake_current_matrices (w
->vchild
);
2208 struct frame
*f
= XFRAME (w
->frame
);
2209 struct glyph_matrix
*m
= w
->current_matrix
;
2210 struct glyph_matrix
*fm
= f
->current_matrix
;
2212 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2213 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2215 for (i
= 0; i
< m
->matrix_h
; ++i
)
2217 struct glyph_row
*r
= m
->rows
+ i
;
2218 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2220 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2221 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2223 r
->enabled_p
= fr
->enabled_p
;
2226 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2227 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2228 r
->used
[TEXT_AREA
] = (m
->matrix_w
2229 - r
->used
[LEFT_MARGIN_AREA
]
2230 - r
->used
[RIGHT_MARGIN_AREA
]);
2239 /* Save away the contents of frame F's current frame matrix. Value is
2240 a glyph matrix holding the contents of F's current frame matrix. */
2242 static struct glyph_matrix
*
2243 save_current_matrix (f
)
2247 struct glyph_matrix
*saved
;
2249 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2250 bzero (saved
, sizeof *saved
);
2251 saved
->nrows
= f
->current_matrix
->nrows
;
2252 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2253 * sizeof *saved
->rows
);
2254 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2256 for (i
= 0; i
< saved
->nrows
; ++i
)
2258 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2259 struct glyph_row
*to
= saved
->rows
+ i
;
2260 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2261 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2262 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2263 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2270 /* Restore the contents of frame F's current frame matrix from SAVED,
2271 and free memory associated with SAVED. */
2274 restore_current_matrix (f
, saved
)
2276 struct glyph_matrix
*saved
;
2280 for (i
= 0; i
< saved
->nrows
; ++i
)
2282 struct glyph_row
*from
= saved
->rows
+ i
;
2283 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2284 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2285 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2286 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2287 xfree (from
->glyphs
[TEXT_AREA
]);
2290 xfree (saved
->rows
);
2296 /* Allocate/reallocate glyph matrices of a single frame F for
2297 frame-based redisplay. */
2300 adjust_frame_glyphs_for_frame_redisplay (f
)
2303 struct dim matrix_dim
;
2305 int window_change_flags
;
2308 if (!FRAME_LIVE_P (f
))
2311 top_window_y
= FRAME_TOP_MARGIN (f
);
2313 /* Allocate glyph pool structures if not already done. */
2314 if (f
->desired_pool
== NULL
)
2316 f
->desired_pool
= new_glyph_pool ();
2317 f
->current_pool
= new_glyph_pool ();
2320 /* Allocate frames matrix structures if needed. */
2321 if (f
->desired_matrix
== NULL
)
2323 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2324 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2327 /* Compute window glyph matrices. (This takes the mini-buffer
2328 window into account). The result is the size of the frame glyph
2329 matrix needed. The variable window_change_flags is set to a bit
2330 mask indicating whether new matrices will be allocated or
2331 existing matrices change their size or location within the frame
2333 window_change_flags
= 0;
2335 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2338 &window_change_flags
);
2340 /* Add in menu bar lines, if any. */
2341 matrix_dim
.height
+= top_window_y
;
2343 /* Enlarge pools as necessary. */
2344 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2345 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2347 /* Set up glyph pointers within window matrices. Do this only if
2348 absolutely necessary since it requires a frame redraw. */
2349 if (pool_changed_p
|| window_change_flags
)
2351 /* Do it for window matrices. */
2352 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2354 &window_change_flags
);
2356 /* Size of frame matrices must equal size of frame. Note
2357 that we are called for X frames with window widths NOT equal
2358 to the frame width (from CHANGE_FRAME_SIZE_1). */
2359 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2360 && matrix_dim
.height
== FRAME_LINES (f
));
2362 /* Pointers to glyph memory in glyph rows are exchanged during
2363 the update phase of redisplay, which means in general that a
2364 frame's current matrix consists of pointers into both the
2365 desired and current glyph pool of the frame. Adjusting a
2366 matrix sets the frame matrix up so that pointers are all into
2367 the same pool. If we want to preserve glyph contents of the
2368 current matrix over a call to adjust_glyph_matrix, we must
2369 make a copy of the current glyphs, and restore the current
2370 matrix' contents from that copy. */
2371 if (display_completed
2372 && !FRAME_GARBAGED_P (f
)
2373 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2374 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2375 /* For some reason, the frame glyph matrix gets corrupted if
2376 any of the windows contain margins. I haven't been able
2377 to hunt down the reason, but for the moment this prevents
2378 the problem from manifesting. -- cyd */
2379 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2381 struct glyph_matrix
*copy
= save_current_matrix (f
);
2382 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2383 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2384 restore_current_matrix (f
, copy
);
2385 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2389 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2390 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2391 SET_FRAME_GARBAGED (f
);
2397 /* Allocate/reallocate glyph matrices of a single frame F for
2398 window-based redisplay. */
2401 adjust_frame_glyphs_for_window_redisplay (f
)
2406 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2408 /* Allocate/reallocate window matrices. */
2409 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2411 #ifdef HAVE_X_WINDOWS
2412 /* Allocate/ reallocate matrices of the dummy window used to display
2413 the menu bar under X when no X toolkit support is available. */
2414 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2416 /* Allocate a dummy window if not already done. */
2417 if (NILP (f
->menu_bar_window
))
2419 f
->menu_bar_window
= make_window ();
2420 w
= XWINDOW (f
->menu_bar_window
);
2421 XSETFRAME (w
->frame
, f
);
2422 w
->pseudo_window_p
= 1;
2425 w
= XWINDOW (f
->menu_bar_window
);
2427 /* Set window dimensions to frame dimensions and allocate or
2428 adjust glyph matrices of W. */
2429 XSETFASTINT (w
->top_line
, 0);
2430 XSETFASTINT (w
->left_col
, 0);
2431 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2432 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2433 allocate_matrices_for_window_redisplay (w
);
2435 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2436 #endif /* HAVE_X_WINDOWS */
2439 /* Allocate/ reallocate matrices of the tool bar window. If we
2440 don't have a tool bar window yet, make one. */
2441 if (NILP (f
->tool_bar_window
))
2443 f
->tool_bar_window
= make_window ();
2444 w
= XWINDOW (f
->tool_bar_window
);
2445 XSETFRAME (w
->frame
, f
);
2446 w
->pseudo_window_p
= 1;
2449 w
= XWINDOW (f
->tool_bar_window
);
2451 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2452 XSETFASTINT (w
->left_col
, 0);
2453 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2454 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2455 allocate_matrices_for_window_redisplay (w
);
2460 /* Adjust/ allocate message buffer of frame F.
2462 Note that the message buffer is never freed. Since I could not
2463 find a free in 19.34, I assume that freeing it would be
2464 problematic in some way and don't do it either.
2466 (Implementation note: It should be checked if we can free it
2467 eventually without causing trouble). */
2470 adjust_frame_message_buffer (f
)
2473 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2475 if (FRAME_MESSAGE_BUF (f
))
2477 char *buffer
= FRAME_MESSAGE_BUF (f
);
2478 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2479 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2482 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2486 /* Re-allocate buffer for decode_mode_spec on frame F. */
2489 adjust_decode_mode_spec_buffer (f
)
2492 f
->decode_mode_spec_buffer
2493 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2494 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2499 /**********************************************************************
2500 Freeing Glyph Matrices
2501 **********************************************************************/
2503 /* Free glyph memory for a frame F. F may be null. This function can
2504 be called for the same frame more than once. The root window of
2505 F may be nil when this function is called. This is the case when
2506 the function is called when F is destroyed. */
2512 if (f
&& f
->glyphs_initialized_p
)
2514 /* Block interrupt input so that we don't get surprised by an X
2515 event while we're in an inconsistent state. */
2517 f
->glyphs_initialized_p
= 0;
2519 /* Release window sub-matrices. */
2520 if (!NILP (f
->root_window
))
2521 free_window_matrices (XWINDOW (f
->root_window
));
2523 /* Free the dummy window for menu bars without X toolkit and its
2525 if (!NILP (f
->menu_bar_window
))
2527 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2528 free_glyph_matrix (w
->desired_matrix
);
2529 free_glyph_matrix (w
->current_matrix
);
2530 w
->desired_matrix
= w
->current_matrix
= NULL
;
2531 f
->menu_bar_window
= Qnil
;
2534 /* Free the tool bar window and its glyph matrices. */
2535 if (!NILP (f
->tool_bar_window
))
2537 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2538 free_glyph_matrix (w
->desired_matrix
);
2539 free_glyph_matrix (w
->current_matrix
);
2540 w
->desired_matrix
= w
->current_matrix
= NULL
;
2541 f
->tool_bar_window
= Qnil
;
2544 /* Release frame glyph matrices. Reset fields to zero in
2545 case we are called a second time. */
2546 if (f
->desired_matrix
)
2548 free_glyph_matrix (f
->desired_matrix
);
2549 free_glyph_matrix (f
->current_matrix
);
2550 f
->desired_matrix
= f
->current_matrix
= NULL
;
2553 /* Release glyph pools. */
2554 if (f
->desired_pool
)
2556 free_glyph_pool (f
->desired_pool
);
2557 free_glyph_pool (f
->current_pool
);
2558 f
->desired_pool
= f
->current_pool
= NULL
;
2566 /* Free glyph sub-matrices in the window tree rooted at W. This
2567 function may be called with a null pointer, and it may be called on
2568 the same tree more than once. */
2571 free_window_matrices (w
)
2576 if (!NILP (w
->hchild
))
2577 free_window_matrices (XWINDOW (w
->hchild
));
2578 else if (!NILP (w
->vchild
))
2579 free_window_matrices (XWINDOW (w
->vchild
));
2582 /* This is a leaf window. Free its memory and reset fields
2583 to zero in case this function is called a second time for
2585 free_glyph_matrix (w
->current_matrix
);
2586 free_glyph_matrix (w
->desired_matrix
);
2587 w
->current_matrix
= w
->desired_matrix
= NULL
;
2590 /* Next window on same level. */
2591 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2596 /* Check glyph memory leaks. This function is called from
2597 shut_down_emacs. Note that frames are not destroyed when Emacs
2598 exits. We therefore free all glyph memory for all active frames
2599 explicitly and check that nothing is left allocated. */
2602 check_glyph_memory ()
2604 Lisp_Object tail
, frame
;
2606 /* Free glyph memory for all frames. */
2607 FOR_EACH_FRAME (tail
, frame
)
2608 free_glyphs (XFRAME (frame
));
2610 /* Check that nothing is left allocated. */
2611 if (glyph_matrix_count
)
2613 if (glyph_pool_count
)
2619 /**********************************************************************
2620 Building a Frame Matrix
2621 **********************************************************************/
2623 /* Most of the redisplay code works on glyph matrices attached to
2624 windows. This is a good solution most of the time, but it is not
2625 suitable for terminal code. Terminal output functions cannot rely
2626 on being able to set an arbitrary terminal window. Instead they
2627 must be provided with a view of the whole frame, i.e. the whole
2628 screen. We build such a view by constructing a frame matrix from
2629 window matrices in this section.
2631 Windows that must be updated have their must_be_update_p flag set.
2632 For all such windows, their desired matrix is made part of the
2633 desired frame matrix. For other windows, their current matrix is
2634 made part of the desired frame matrix.
2636 +-----------------+----------------+
2637 | desired | desired |
2639 +-----------------+----------------+
2642 +----------------------------------+
2644 Desired window matrices can be made part of the frame matrix in a
2645 cheap way: We exploit the fact that the desired frame matrix and
2646 desired window matrices share their glyph memory. This is not
2647 possible for current window matrices. Their glyphs are copied to
2648 the desired frame matrix. The latter is equivalent to
2649 preserve_other_columns in the old redisplay.
2651 Used glyphs counters for frame matrix rows are the result of adding
2652 up glyph lengths of the window matrices. A line in the frame
2653 matrix is enabled, if a corresponding line in a window matrix is
2656 After building the desired frame matrix, it will be passed to
2657 terminal code, which will manipulate both the desired and current
2658 frame matrix. Changes applied to the frame's current matrix have
2659 to be visible in current window matrices afterwards, of course.
2661 This problem is solved like this:
2663 1. Window and frame matrices share glyphs. Window matrices are
2664 constructed in a way that their glyph contents ARE the glyph
2665 contents needed in a frame matrix. Thus, any modification of
2666 glyphs done in terminal code will be reflected in window matrices
2669 2. Exchanges of rows in a frame matrix done by terminal code are
2670 intercepted by hook functions so that corresponding row operations
2671 on window matrices can be performed. This is necessary because we
2672 use pointers to glyphs in glyph row structures. To satisfy the
2673 assumption of point 1 above that glyphs are updated implicitly in
2674 window matrices when they are manipulated via the frame matrix,
2675 window and frame matrix must of course agree where to find the
2676 glyphs for their rows. Possible manipulations that must be
2677 mirrored are assignments of rows of the desired frame matrix to the
2678 current frame matrix and scrolling the current frame matrix. */
2680 /* Build frame F's desired matrix from window matrices. Only windows
2681 which have the flag must_be_updated_p set have to be updated. Menu
2682 bar lines of a frame are not covered by window matrices, so make
2683 sure not to touch them in this function. */
2686 build_frame_matrix (f
)
2691 /* F must have a frame matrix when this function is called. */
2692 xassert (!FRAME_WINDOW_P (f
));
2694 /* Clear all rows in the frame matrix covered by window matrices.
2695 Menu bar lines are not covered by windows. */
2696 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2697 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2699 /* Build the matrix by walking the window tree. */
2700 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2701 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2705 /* Walk a window tree, building a frame matrix MATRIX from window
2706 matrices. W is the root of a window tree. */
2709 build_frame_matrix_from_window_tree (matrix
, w
)
2710 struct glyph_matrix
*matrix
;
2715 if (!NILP (w
->hchild
))
2716 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2717 else if (!NILP (w
->vchild
))
2718 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2720 build_frame_matrix_from_leaf_window (matrix
, w
);
2722 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2727 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2728 desired frame matrix built. W is a leaf window whose desired or
2729 current matrix is to be added to FRAME_MATRIX. W's flag
2730 must_be_updated_p determines which matrix it contributes to
2731 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2732 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2733 Adding a desired matrix means setting up used counters and such in
2734 frame rows, while adding a current window matrix to FRAME_MATRIX
2735 means copying glyphs. The latter case corresponds to
2736 preserve_other_columns in the old redisplay. */
2739 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2740 struct glyph_matrix
*frame_matrix
;
2743 struct glyph_matrix
*window_matrix
;
2744 int window_y
, frame_y
;
2745 /* If non-zero, a glyph to insert at the right border of W. */
2746 GLYPH right_border_glyph
;
2748 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2750 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2751 if (w
->must_be_updated_p
)
2753 window_matrix
= w
->desired_matrix
;
2755 /* Decide whether we want to add a vertical border glyph. */
2756 if (!WINDOW_RIGHTMOST_P (w
))
2758 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2761 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2763 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2764 && GLYPH_CODE_CHAR_VALID_P (gc
))
2766 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2767 spec_glyph_lookup_face (w
, &right_border_glyph
);
2770 if (GLYPH_FACE (right_border_glyph
) <= 0)
2771 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2775 window_matrix
= w
->current_matrix
;
2777 /* For all rows in the window matrix and corresponding rows in the
2780 frame_y
= window_matrix
->matrix_y
;
2781 while (window_y
< window_matrix
->nrows
)
2783 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2784 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2785 int current_row_p
= window_matrix
== w
->current_matrix
;
2787 /* Fill up the frame row with spaces up to the left margin of the
2789 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2791 /* Fill up areas in the window matrix row with spaces. */
2792 fill_up_glyph_row_with_spaces (window_row
);
2794 /* If only part of W's desired matrix has been built, and
2795 window_row wasn't displayed, use the corresponding current
2797 if (window_matrix
== w
->desired_matrix
2798 && !window_row
->enabled_p
)
2800 window_row
= w
->current_matrix
->rows
+ window_y
;
2806 /* Copy window row to frame row. */
2807 bcopy (window_row
->glyphs
[0],
2808 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2809 window_matrix
->matrix_w
* sizeof (struct glyph
));
2813 xassert (window_row
->enabled_p
);
2815 /* Only when a desired row has been displayed, we want
2816 the corresponding frame row to be updated. */
2817 frame_row
->enabled_p
= 1;
2819 /* Maybe insert a vertical border between horizontally adjacent
2821 if (GLYPH_CHAR (right_border_glyph
) != 0)
2823 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2824 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2828 /* Window row window_y must be a slice of frame row
2830 xassert (glyph_row_slice_p (window_row
, frame_row
));
2832 /* If rows are in sync, we don't have to copy glyphs because
2833 frame and window share glyphs. */
2835 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2836 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2840 /* Set number of used glyphs in the frame matrix. Since we fill
2841 up with spaces, and visit leaf windows from left to right it
2842 can be done simply. */
2843 frame_row
->used
[TEXT_AREA
]
2844 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2852 /* Given a user-specified glyph, possibly including a Lisp-level face
2853 ID, return a glyph that has a realized face ID.
2854 This is used for glyphs displayed specially and not part of the text;
2855 for instance, vertical separators, truncation markers, etc. */
2858 spec_glyph_lookup_face (w
, glyph
)
2862 int lface_id
= GLYPH_FACE (*glyph
);
2863 /* Convert the glyph's specified face to a realized (cache) face. */
2866 int face_id
= merge_faces (XFRAME (w
->frame
),
2867 Qt
, lface_id
, DEFAULT_FACE_ID
);
2868 SET_GLYPH_FACE (*glyph
, face_id
);
2872 /* Add spaces to a glyph row ROW in a window matrix.
2874 Each row has the form:
2876 +---------+-----------------------------+------------+
2877 | left | text | right |
2878 +---------+-----------------------------+------------+
2880 Left and right marginal areas are optional. This function adds
2881 spaces to areas so that there are no empty holes between areas.
2882 In other words: If the right area is not empty, the text area
2883 is filled up with spaces up to the right area. If the text area
2884 is not empty, the left area is filled up.
2886 To be called for frame-based redisplay, only. */
2889 fill_up_glyph_row_with_spaces (row
)
2890 struct glyph_row
*row
;
2892 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2893 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2894 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2898 /* Fill area AREA of glyph row ROW with spaces. To be called for
2899 frame-based redisplay only. */
2902 fill_up_glyph_row_area_with_spaces (row
, area
)
2903 struct glyph_row
*row
;
2906 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2908 struct glyph
*end
= row
->glyphs
[area
+ 1];
2909 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2912 *text
++ = space_glyph
;
2913 row
->used
[area
] = text
- row
->glyphs
[area
];
2918 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2919 reached. In frame matrices only one area, TEXT_AREA, is used. */
2922 fill_up_frame_row_with_spaces (row
, upto
)
2923 struct glyph_row
*row
;
2926 int i
= row
->used
[TEXT_AREA
];
2927 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2930 glyph
[i
++] = space_glyph
;
2932 row
->used
[TEXT_AREA
] = i
;
2937 /**********************************************************************
2938 Mirroring operations on frame matrices in window matrices
2939 **********************************************************************/
2941 /* Set frame being updated via frame-based redisplay to F. This
2942 function must be called before updates to make explicit that we are
2943 working on frame matrices or not. */
2946 set_frame_matrix_frame (f
)
2949 frame_matrix_frame
= f
;
2953 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2954 DESIRED_MATRIX is the desired matrix corresponding to
2955 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2956 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2957 frame_matrix_frame is non-null, this indicates that the exchange is
2958 done in frame matrices, and that we have to perform analogous
2959 operations in window matrices of frame_matrix_frame. */
2962 make_current (desired_matrix
, current_matrix
, row
)
2963 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2966 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2967 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2968 int mouse_face_p
= current_row
->mouse_face_p
;
2970 /* Do current_row = desired_row. This exchanges glyph pointers
2971 between both rows, and does a structure assignment otherwise. */
2972 assign_row (current_row
, desired_row
);
2974 /* Enable current_row to mark it as valid. */
2975 current_row
->enabled_p
= 1;
2976 current_row
->mouse_face_p
= mouse_face_p
;
2978 /* If we are called on frame matrices, perform analogous operations
2979 for window matrices. */
2980 if (frame_matrix_frame
)
2981 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2985 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2986 W's frame which has been made current (by swapping pointers between
2987 current and desired matrix). Perform analogous operations in the
2988 matrices of leaf windows in the window tree rooted at W. */
2991 mirror_make_current (w
, frame_row
)
2997 if (!NILP (w
->hchild
))
2998 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2999 else if (!NILP (w
->vchild
))
3000 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3003 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3004 here because the checks performed in debug mode there
3005 will not allow the conversion. */
3006 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3008 /* If FRAME_ROW is within W, assign the desired row to the
3009 current row (exchanging glyph pointers). */
3010 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3012 struct glyph_row
*current_row
3013 = MATRIX_ROW (w
->current_matrix
, row
);
3014 struct glyph_row
*desired_row
3015 = MATRIX_ROW (w
->desired_matrix
, row
);
3017 if (desired_row
->enabled_p
)
3018 assign_row (current_row
, desired_row
);
3020 swap_glyph_pointers (desired_row
, current_row
);
3021 current_row
->enabled_p
= 1;
3025 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3030 /* Perform row dance after scrolling. We are working on the range of
3031 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3032 including) in MATRIX. COPY_FROM is a vector containing, for each
3033 row I in the range 0 <= I < NLINES, the index of the original line
3034 to move to I. This index is relative to the row range, i.e. 0 <=
3035 index < NLINES. RETAINED_P is a vector containing zero for each
3036 row 0 <= I < NLINES which is empty.
3038 This function is called from do_scrolling and do_direct_scrolling. */
3041 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3043 struct glyph_matrix
*matrix
;
3044 int unchanged_at_top
, nlines
;
3048 /* A copy of original rows. */
3049 struct glyph_row
*old_rows
;
3051 /* Rows to assign to. */
3052 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3056 /* Make a copy of the original rows. */
3057 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3058 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3060 /* Assign new rows, maybe clear lines. */
3061 for (i
= 0; i
< nlines
; ++i
)
3063 int enabled_before_p
= new_rows
[i
].enabled_p
;
3065 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3066 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3067 new_rows
[i
] = old_rows
[copy_from
[i
]];
3068 new_rows
[i
].enabled_p
= enabled_before_p
;
3070 /* RETAINED_P is zero for empty lines. */
3071 if (!retained_p
[copy_from
[i
]])
3072 new_rows
[i
].enabled_p
= 0;
3075 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3076 if (frame_matrix_frame
)
3077 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3078 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3082 /* Synchronize glyph pointers in the current matrix of window W with
3083 the current frame matrix. */
3086 sync_window_with_frame_matrix_rows (w
)
3089 struct frame
*f
= XFRAME (w
->frame
);
3090 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3091 int left
, right
, x
, width
;
3093 /* Preconditions: W must be a leaf window on a tty frame. */
3094 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3095 xassert (!FRAME_WINDOW_P (f
));
3097 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3098 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3099 x
= w
->current_matrix
->matrix_x
;
3100 width
= w
->current_matrix
->matrix_w
;
3102 window_row
= w
->current_matrix
->rows
;
3103 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3104 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3106 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3108 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3109 = frame_row
->glyphs
[0] + x
;
3110 window_row
->glyphs
[TEXT_AREA
]
3111 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3112 window_row
->glyphs
[LAST_AREA
]
3113 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3114 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3115 = window_row
->glyphs
[LAST_AREA
] - right
;
3120 /* Return the window in the window tree rooted in W containing frame
3121 row ROW. Value is null if none is found. */
3124 frame_row_to_window (w
, row
)
3128 struct window
*found
= NULL
;
3132 if (!NILP (w
->hchild
))
3133 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3134 else if (!NILP (w
->vchild
))
3135 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3136 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3137 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3140 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3147 /* Perform a line dance in the window tree rooted at W, after
3148 scrolling a frame matrix in mirrored_line_dance.
3150 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3151 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3152 COPY_FROM is a vector containing, for each row I in the range 0 <=
3153 I < NLINES, the index of the original line to move to I. This
3154 index is relative to the row range, i.e. 0 <= index < NLINES.
3155 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3159 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3161 int unchanged_at_top
, nlines
;
3167 if (!NILP (w
->hchild
))
3168 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3169 nlines
, copy_from
, retained_p
);
3170 else if (!NILP (w
->vchild
))
3171 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3172 nlines
, copy_from
, retained_p
);
3175 /* W is a leaf window, and we are working on its current
3177 struct glyph_matrix
*m
= w
->current_matrix
;
3179 struct glyph_row
*old_rows
;
3181 /* Make a copy of the original rows of matrix m. */
3182 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3183 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3185 for (i
= 0; i
< nlines
; ++i
)
3187 /* Frame relative line assigned to. */
3188 int frame_to
= i
+ unchanged_at_top
;
3190 /* Frame relative line assigned. */
3191 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3193 /* Window relative line assigned to. */
3194 int window_to
= frame_to
- m
->matrix_y
;
3196 /* Window relative line assigned. */
3197 int window_from
= frame_from
- m
->matrix_y
;
3199 /* Is assigned line inside window? */
3200 int from_inside_window_p
3201 = window_from
>= 0 && window_from
< m
->matrix_h
;
3203 /* Is assigned to line inside window? */
3204 int to_inside_window_p
3205 = window_to
>= 0 && window_to
< m
->matrix_h
;
3207 if (from_inside_window_p
&& to_inside_window_p
)
3209 /* Enabled setting before assignment. */
3210 int enabled_before_p
;
3212 /* Do the assignment. The enabled_p flag is saved
3213 over the assignment because the old redisplay did
3215 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3216 m
->rows
[window_to
] = old_rows
[window_from
];
3217 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3219 /* If frame line is empty, window line is empty, too. */
3220 if (!retained_p
[copy_from
[i
]])
3221 m
->rows
[window_to
].enabled_p
= 0;
3223 else if (to_inside_window_p
)
3225 /* A copy between windows. This is an infrequent
3226 case not worth optimizing. */
3227 struct frame
*f
= XFRAME (w
->frame
);
3228 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3230 struct glyph_matrix
*m2
;
3233 w2
= frame_row_to_window (root
, frame_from
);
3234 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3235 -nw', FROM_FRAME sometimes has no associated window.
3236 This check avoids a segfault if W2 is null. */
3239 m2
= w2
->current_matrix
;
3240 m2_from
= frame_from
- m2
->matrix_y
;
3241 copy_row_except_pointers (m
->rows
+ window_to
,
3242 m2
->rows
+ m2_from
);
3244 /* If frame line is empty, window line is empty, too. */
3245 if (!retained_p
[copy_from
[i
]])
3246 m
->rows
[window_to
].enabled_p
= 0;
3250 else if (from_inside_window_p
)
3254 /* If there was a copy between windows, make sure glyph
3255 pointers are in sync with the frame matrix. */
3257 sync_window_with_frame_matrix_rows (w
);
3259 /* Check that no pointers are lost. */
3263 /* Next window on same level. */
3264 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3271 /* Check that window and frame matrices agree about their
3272 understanding where glyphs of the rows are to find. For each
3273 window in the window tree rooted at W, check that rows in the
3274 matrices of leaf window agree with their frame matrices about
3278 check_window_matrix_pointers (w
)
3283 if (!NILP (w
->hchild
))
3284 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3285 else if (!NILP (w
->vchild
))
3286 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3289 struct frame
*f
= XFRAME (w
->frame
);
3290 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3291 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3294 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3299 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3300 a window and FRAME_MATRIX is the corresponding frame matrix. For
3301 each row in WINDOW_MATRIX check that it's a slice of the
3302 corresponding frame row. If it isn't, abort. */
3305 check_matrix_pointers (window_matrix
, frame_matrix
)
3306 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3308 /* Row number in WINDOW_MATRIX. */
3311 /* Row number corresponding to I in FRAME_MATRIX. */
3312 int j
= window_matrix
->matrix_y
;
3314 /* For all rows check that the row in the window matrix is a
3315 slice of the row in the frame matrix. If it isn't we didn't
3316 mirror an operation on the frame matrix correctly. */
3317 while (i
< window_matrix
->nrows
)
3319 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3320 frame_matrix
->rows
+ j
))
3326 #endif /* GLYPH_DEBUG != 0 */
3330 /**********************************************************************
3331 VPOS and HPOS translations
3332 **********************************************************************/
3336 /* Translate vertical position VPOS which is relative to window W to a
3337 vertical position relative to W's frame. */
3340 window_to_frame_vpos (w
, vpos
)
3344 struct frame
*f
= XFRAME (w
->frame
);
3346 xassert (!FRAME_WINDOW_P (f
));
3347 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3348 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3349 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3354 /* Translate horizontal position HPOS which is relative to window W to
3355 a horizontal position relative to W's frame. */
3358 window_to_frame_hpos (w
, hpos
)
3362 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3363 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3367 #endif /* GLYPH_DEBUG */
3371 /**********************************************************************
3373 **********************************************************************/
3375 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3376 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3382 CHECK_LIVE_FRAME (frame
);
3385 /* Ignore redraw requests, if frame has no glyphs yet.
3386 (Implementation note: It still has to be checked why we are
3387 called so early here). */
3388 if (!glyphs_initialized_initially_p
)
3393 if (FRAME_MSDOS_P (f
))
3394 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3397 clear_current_matrices (f
);
3399 if (FRAME_TERMCAP_P (f
))
3400 fflush (FRAME_TTY (f
)->output
);
3401 windows_or_buffers_changed
++;
3402 /* Mark all windows as inaccurate, so that every window will have
3403 its redisplay done. */
3404 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3405 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3411 /* Redraw frame F. This is nothing more than a call to the Lisp
3412 function redraw-frame. */
3419 XSETFRAME (frame
, f
);
3420 Fredraw_frame (frame
);
3424 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3425 doc
: /* Clear and redisplay all visible frames. */)
3428 Lisp_Object tail
, frame
;
3430 FOR_EACH_FRAME (tail
, frame
)
3431 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3432 Fredraw_frame (frame
);
3438 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3439 visible frames marked as garbaged. */
3442 redraw_garbaged_frames ()
3444 Lisp_Object tail
, frame
;
3446 FOR_EACH_FRAME (tail
, frame
)
3447 if (FRAME_VISIBLE_P (XFRAME (frame
))
3448 && FRAME_GARBAGED_P (XFRAME (frame
)))
3449 Fredraw_frame (frame
);
3454 /***********************************************************************
3456 ***********************************************************************/
3458 /* Try to update display and current glyph matrix directly.
3460 This function is called after a character G has been inserted into
3461 current_buffer. It tries to update the current glyph matrix and
3462 perform appropriate screen output to reflect the insertion. If it
3463 succeeds, the global flag redisplay_performed_directly_p will be
3464 set to 1, and thereby prevent the more costly general redisplay
3465 from running (see redisplay_internal).
3467 This function is not called for `hairy' character insertions.
3468 In particular, it is not called when after or before change
3469 functions exist, like they are used by font-lock. See keyboard.c
3470 for details where this function is called. */
3473 direct_output_for_insert (g
)
3476 register struct frame
*f
= SELECTED_FRAME ();
3477 struct window
*w
= XWINDOW (selected_window
);
3479 struct glyph_row
*glyph_row
;
3480 struct glyph
*glyphs
, *glyph
, *end
;
3482 /* Non-null means that redisplay of W is based on window matrices. */
3483 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3484 /* Non-null means we are in overwrite mode. */
3485 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3487 struct text_pos pos
;
3488 int delta
, delta_bytes
;
3490 /* Not done directly. */
3491 redisplay_performed_directly_p
= 0;
3493 /* Quickly give up for some common cases. */
3494 if (cursor_in_echo_area
3495 /* Give up if fonts have changed. */
3497 /* Give up if face attributes have been changed. */
3498 || face_change_count
3499 /* Give up if cursor position not really known. */
3500 || !display_completed
3501 /* Give up if buffer appears in two places. */
3502 || buffer_shared
> 1
3503 /* Give up if currently displaying a message instead of the
3504 minibuffer contents. */
3505 || (EQ (selected_window
, minibuf_window
)
3506 && EQ (minibuf_window
, echo_area_window
))
3507 /* Give up for hscrolled mini-buffer because display of the prompt
3508 is handled specially there (see display_line). */
3509 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3510 /* Give up if overwriting in the middle of a line. */
3513 && FETCH_BYTE (PT
) != '\n')
3514 /* Give up for tabs and line ends. */
3518 || (g
== ' ' && !NILP (current_buffer
->word_wrap
))
3519 /* Give up if unable to display the cursor in the window. */
3520 || w
->cursor
.vpos
< 0
3521 /* Give up if we are showing a message or just cleared the message
3522 because we might need to resize the echo area window. */
3523 || !NILP (echo_area_buffer
[0])
3524 || !NILP (echo_area_buffer
[1])
3525 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3526 /* Can't do it in a continued line because continuation
3527 lines would change. */
3528 (glyph_row
->continued_p
3529 || glyph_row
->exact_window_width_line_p
3530 /* Can't use this method if the line overlaps others or is
3531 overlapped by others because these other lines would
3532 have to be redisplayed. */
3533 || glyph_row
->overlapping_p
3534 || glyph_row
->overlapped_p
))
3535 /* Can't do it for partial width windows on terminal frames
3536 because we can't clear to eol in such a window. */
3537 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3540 /* If we can't insert glyphs, we can use this method only
3541 at the end of a line. */
3542 if (!FRAME_CHAR_INS_DEL_OK (f
))
3543 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3546 /* Set up a display iterator structure for W. Glyphs will be
3547 produced in scratch_glyph_row. Current position is W's cursor
3549 clear_glyph_row (&scratch_glyph_row
);
3550 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3551 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3552 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3555 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3556 if (glyph_row
->mouse_face_p
)
3559 /* Give up if highlighting trailing whitespace and we have trailing
3560 whitespace in glyph_row. We would have to remove the trailing
3561 whitespace face in that case. */
3562 if (!NILP (Vshow_trailing_whitespace
)
3563 && glyph_row
->used
[TEXT_AREA
])
3567 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3568 if (last
->type
== STRETCH_GLYPH
3569 || (last
->type
== CHAR_GLYPH
3570 && last
->u
.ch
== ' '))
3574 /* Give up if there are overlay strings at pos. This would fail
3575 if the overlay string has newlines in it. */
3576 if (STRINGP (it
.string
))
3579 it
.hpos
= w
->cursor
.hpos
;
3580 it
.vpos
= w
->cursor
.vpos
;
3581 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3582 it
.current_y
= w
->cursor
.y
;
3583 it
.end_charpos
= PT
;
3584 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3585 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3587 /* More than one display element may be returned for PT - 1 if
3588 (i) it's a control character which is translated into `\003' or
3589 `^C', or (ii) it has a display table entry, or (iii) it's a
3590 combination of both. */
3591 delta
= delta_bytes
= 0;
3592 while (get_next_display_element (&it
))
3594 PRODUCE_GLYPHS (&it
);
3596 /* Give up if glyph doesn't fit completely on the line. */
3597 if (it
.current_x
>= it
.last_visible_x
)
3600 /* Give up if new glyph has different ascent or descent than
3601 the original row, or if it is not a character glyph. */
3602 if (glyph_row
->ascent
!= it
.ascent
3603 || glyph_row
->height
!= it
.ascent
+ it
.descent
3604 || glyph_row
->phys_ascent
!= it
.phys_ascent
3605 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3606 || it
.what
!= IT_CHARACTER
)
3610 delta_bytes
+= it
.len
;
3611 set_iterator_to_next (&it
, 1);
3614 /* Give up if we hit the right edge of the window. We would have
3615 to insert truncation or continuation glyphs. */
3616 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3617 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3620 /* Give up if there is a \t following in the line. */
3622 it2
.end_charpos
= ZV
;
3623 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3624 while (get_next_display_element (&it2
)
3625 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3629 set_iterator_to_next (&it2
, 1);
3632 /* Number of new glyphs produced. */
3633 n
= it
.glyph_row
->used
[TEXT_AREA
];
3635 /* Start and end of glyphs in original row. */
3636 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3637 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3639 /* Make room for new glyphs, then insert them. */
3640 xassert (end
- glyphs
- n
>= 0);
3641 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3642 (end
- glyphs
- n
) * sizeof (*end
));
3643 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3644 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3645 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3647 /* Compute new line width. */
3648 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3649 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3650 glyph_row
->pixel_width
= glyph_row
->x
;
3653 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3657 /* Increment buffer positions for glyphs following the newly
3659 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3660 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3661 glyph
->charpos
+= delta
;
3663 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3665 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3666 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3669 /* Adjust positions in lines following the one we are in. */
3670 increment_matrix_positions (w
->current_matrix
,
3672 w
->current_matrix
->nrows
,
3673 delta
, delta_bytes
);
3675 glyph_row
->contains_overlapping_glyphs_p
3676 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3678 glyph_row
->displays_text_p
= 1;
3679 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3680 XFASTINT (w
->window_end_vpos
)));
3682 if (!NILP (Vshow_trailing_whitespace
))
3683 highlight_trailing_whitespace (it
.f
, glyph_row
);
3685 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3686 In the middle, we have to insert glyphs. Note that this is now
3687 implemented for X frames. The implementation uses updated_window
3689 updated_row
= glyph_row
;
3690 updated_area
= TEXT_AREA
;
3694 FRAME_RIF (f
)->update_window_begin_hook (w
);
3696 if (glyphs
== end
- n
3697 /* In front of a space added by append_space. */
3698 || (glyphs
== end
- n
- 1
3699 && (end
- n
)->charpos
<= 0))
3700 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3702 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3706 if (glyphs
== end
- n
)
3707 write_glyphs (f
, glyphs
, n
);
3709 insert_glyphs (f
, glyphs
, n
);
3712 w
->cursor
.hpos
+= n
;
3713 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3714 xassert (w
->cursor
.hpos
>= 0
3715 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3717 /* How to set the cursor differs depending on whether we are
3718 using a frame matrix or a window matrix. Note that when
3719 a frame matrix is used, cursor_to expects frame coordinates,
3720 and the X and Y parameters are not used. */
3721 if (window_redisplay_p
)
3722 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3723 w
->cursor
.y
, w
->cursor
.x
);
3727 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3728 + (INTEGERP (w
->left_margin_cols
)
3729 ? XFASTINT (w
->left_margin_cols
)
3731 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3732 cursor_to (f
, y
, x
);
3735 #ifdef HAVE_WINDOW_SYSTEM
3736 update_window_fringes (w
, 0);
3740 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3743 if (FRAME_TERMCAP_P (f
))
3744 fflush (FRAME_TTY (f
)->output
);
3746 TRACE ((stderr
, "direct output for insert\n"));
3747 mark_window_display_accurate (it
.window
, 1);
3748 redisplay_performed_directly_p
= 1;
3753 /* Perform a direct display update for moving PT by N positions
3754 left or right. N < 0 means a movement backwards. This function
3755 is currently only called for N == 1 or N == -1. */
3758 direct_output_forward_char (n
)
3761 struct frame
*f
= SELECTED_FRAME ();
3762 struct window
*w
= XWINDOW (selected_window
);
3763 struct glyph_row
*row
;
3765 /* Give up if point moved out of or into a composition. */
3766 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3767 current_buffer
, PT
))
3770 /* Give up if face attributes have been changed. */
3771 if (face_change_count
)
3774 /* Give up if current matrix is not up to date or we are
3775 displaying a message. */
3776 if (!display_completed
|| cursor_in_echo_area
)
3779 /* Give up if we need bidi display. */
3780 if (!NILP (XBUFFER (w
->buffer
)->enable_bidi_display
))
3783 /* Give up if the buffer's orientation is reversed. */
3784 if (!NILP (XBUFFER (w
->buffer
)->orientation_reversed
))
3787 /* Can't use direct output if highlighting a region. */
3788 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3791 /* Can't use direct output if highlighting trailing whitespace. */
3792 if (!NILP (Vshow_trailing_whitespace
))
3795 /* Give up if we are showing a message or just cleared the message
3796 because we might need to resize the echo area window. */
3797 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3800 /* Give up if currently displaying a message instead of the
3801 minibuffer contents. */
3802 if (XWINDOW (minibuf_window
) == w
3803 && EQ (minibuf_window
, echo_area_window
))
3806 /* Give up if we don't know where the cursor is. */
3807 if (w
->cursor
.vpos
< 0)
3810 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3812 /* Give up if PT is outside of the last known cursor row. */
3813 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3814 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3817 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3819 w
->last_cursor
= w
->cursor
;
3820 XSETFASTINT (w
->last_point
, PT
);
3822 xassert (w
->cursor
.hpos
>= 0
3823 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3825 if (FRAME_WINDOW_P (f
))
3826 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3827 w
->cursor
.y
, w
->cursor
.x
);
3831 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3832 + (INTEGERP (w
->left_margin_cols
)
3833 ? XFASTINT (w
->left_margin_cols
)
3835 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3836 cursor_to (f
, y
, x
);
3839 if (FRAME_TERMCAP_P (f
))
3840 fflush (FRAME_TTY (f
)->output
);
3841 redisplay_performed_directly_p
= 1;
3847 /***********************************************************************
3849 ***********************************************************************/
3851 /* Update frame F based on the data in desired matrices.
3853 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3854 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3857 Value is non-zero if redisplay was stopped due to pending input. */
3860 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3863 int inhibit_hairy_id_p
;
3865 /* 1 means display has been paused because of pending input. */
3867 struct window
*root_window
= XWINDOW (f
->root_window
);
3869 if (redisplay_dont_pause
)
3871 #if PERIODIC_PREEMPTION_CHECKING
3872 else if (NILP (Vredisplay_preemption_period
))
3874 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3877 double p
= XFLOATINT (Vredisplay_preemption_period
);
3880 if (detect_input_pending_ignore_squeezables ())
3887 usec
= (p
- sec
) * 1000000;
3889 EMACS_GET_TIME (tm
);
3890 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3891 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3895 if (FRAME_WINDOW_P (f
))
3897 /* We are working on window matrix basis. All windows whose
3898 flag must_be_updated_p is set have to be updated. */
3900 /* Record that we are not working on frame matrices. */
3901 set_frame_matrix_frame (NULL
);
3903 /* Update all windows in the window tree of F, maybe stopping
3904 when pending input is detected. */
3907 /* Update the menu bar on X frames that don't have toolkit
3909 if (WINDOWP (f
->menu_bar_window
))
3910 update_window (XWINDOW (f
->menu_bar_window
), 1);
3912 /* Update the tool-bar window, if present. */
3913 if (WINDOWP (f
->tool_bar_window
))
3915 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3917 /* Update tool-bar window. */
3918 if (w
->must_be_updated_p
)
3922 update_window (w
, 1);
3923 w
->must_be_updated_p
= 0;
3925 /* Swap tool-bar strings. We swap because we want to
3927 tem
= f
->current_tool_bar_string
;
3928 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3929 f
->desired_tool_bar_string
= tem
;
3934 /* Update windows. */
3935 paused_p
= update_window_tree (root_window
, force_p
);
3938 /* This flush is a performance bottleneck under X,
3939 and it doesn't seem to be necessary anyway (in general).
3940 It is necessary when resizing the window with the mouse, or
3941 at least the fringes are not redrawn in a timely manner. ++kfs */
3942 if (f
->force_flush_display_p
)
3944 FRAME_RIF (f
)->flush_display (f
);
3945 f
->force_flush_display_p
= 0;
3950 /* We are working on frame matrix basis. Set the frame on whose
3951 frame matrix we operate. */
3952 set_frame_matrix_frame (f
);
3954 /* Build F's desired matrix from window matrices. */
3955 build_frame_matrix (f
);
3957 /* Update the display */
3959 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3962 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3964 if (FRAME_TTY (f
)->termscript
)
3965 fflush (FRAME_TTY (f
)->termscript
);
3966 if (FRAME_TERMCAP_P (f
))
3967 fflush (FRAME_TTY (f
)->output
);
3970 /* Check window matrices for lost pointers. */
3972 check_window_matrix_pointers (root_window
);
3973 add_frame_display_history (f
, paused_p
);
3978 /* Reset flags indicating that a window should be updated. */
3979 set_window_update_flags (root_window
, 0);
3981 display_completed
= !paused_p
;
3987 /************************************************************************
3988 Window-based updates
3989 ************************************************************************/
3991 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3992 don't stop updating when input is pending. */
3995 update_window_tree (w
, force_p
)
4001 while (w
&& !paused_p
)
4003 if (!NILP (w
->hchild
))
4004 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
4005 else if (!NILP (w
->vchild
))
4006 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
4007 else if (w
->must_be_updated_p
)
4008 paused_p
|= update_window (w
, force_p
);
4010 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4017 /* Update window W if its flag must_be_updated_p is non-zero. If
4018 FORCE_P is non-zero, don't stop updating if input is pending. */
4021 update_single_window (w
, force_p
)
4025 if (w
->must_be_updated_p
)
4027 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4029 /* Record that this is not a frame-based redisplay. */
4030 set_frame_matrix_frame (NULL
);
4032 if (redisplay_dont_pause
)
4034 #if PERIODIC_PREEMPTION_CHECKING
4035 else if (NILP (Vredisplay_preemption_period
))
4037 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4040 double p
= XFLOATINT (Vredisplay_preemption_period
);
4044 usec
= (p
- sec
) * 1000000;
4046 EMACS_GET_TIME (tm
);
4047 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4048 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4054 update_window (w
, force_p
);
4057 /* Reset flag in W. */
4058 w
->must_be_updated_p
= 0;
4062 #ifdef HAVE_WINDOW_SYSTEM
4064 /* Redraw lines from the current matrix of window W that are
4065 overlapped by other rows. YB is bottom-most y-position in W. */
4068 redraw_overlapped_rows (w
, yb
)
4073 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4075 /* If rows overlapping others have been changed, the rows being
4076 overlapped have to be redrawn. This won't draw lines that have
4077 already been drawn in update_window_line because overlapped_p in
4078 desired rows is 0, so after row assignment overlapped_p in
4079 current rows is 0. */
4080 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4082 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4084 if (!row
->enabled_p
)
4086 else if (row
->mode_line_p
)
4089 if (row
->overlapped_p
)
4091 enum glyph_row_area area
;
4093 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4096 updated_area
= area
;
4097 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
4098 area
== TEXT_AREA
? row
->x
: 0);
4099 if (row
->used
[area
])
4100 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4102 FRAME_RIF (f
)->clear_end_of_line (-1);
4105 row
->overlapped_p
= 0;
4108 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4114 /* Redraw lines from the current matrix of window W that overlap
4115 others. YB is bottom-most y-position in W. */
4118 redraw_overlapping_rows (w
, yb
)
4123 struct glyph_row
*row
;
4124 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4126 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4128 row
= w
->current_matrix
->rows
+ i
;
4130 if (!row
->enabled_p
)
4132 else if (row
->mode_line_p
)
4135 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4137 if (row
->overlapping_p
)
4141 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
4142 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4143 overlaps
|= OVERLAPS_PRED
;
4144 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
4145 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4146 overlaps
|= OVERLAPS_SUCC
;
4150 if (row
->used
[LEFT_MARGIN_AREA
])
4151 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4153 if (row
->used
[TEXT_AREA
])
4154 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4156 if (row
->used
[RIGHT_MARGIN_AREA
])
4157 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4159 /* Record in neighbour rows that ROW overwrites part of
4161 if (overlaps
& OVERLAPS_PRED
)
4162 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4163 if (overlaps
& OVERLAPS_SUCC
)
4164 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4173 #endif /* HAVE_WINDOW_SYSTEM */
4178 /* Check that no row in the current matrix of window W is enabled
4179 which is below what's displayed in the window. */
4182 check_current_matrix_flags (w
)
4185 int last_seen_p
= 0;
4186 int i
, yb
= window_text_bottom_y (w
);
4188 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4190 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4191 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4193 else if (last_seen_p
&& row
->enabled_p
)
4198 #endif /* GLYPH_DEBUG */
4201 /* Update display of window W. FORCE_P non-zero means that we should
4202 not stop when detecting pending input. */
4205 update_window (w
, force_p
)
4209 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4211 #if !PERIODIC_PREEMPTION_CHECKING
4212 int preempt_count
= baud_rate
/ 2400 + 1;
4214 extern int input_pending
;
4215 extern Lisp_Object do_mouse_tracking
;
4216 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4218 /* Check that W's frame doesn't have glyph matrices. */
4219 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4222 /* Check pending input the first time so that we can quickly return. */
4223 #if !PERIODIC_PREEMPTION_CHECKING
4225 detect_input_pending_ignore_squeezables ();
4228 /* If forced to complete the update, or if no input is pending, do
4230 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4232 struct glyph_row
*row
, *end
;
4233 struct glyph_row
*mode_line_row
;
4234 struct glyph_row
*header_line_row
;
4235 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4237 rif
->update_window_begin_hook (w
);
4238 yb
= window_text_bottom_y (w
);
4240 /* If window has a header line, update it before everything else.
4241 Adjust y-positions of other rows by the header line height. */
4242 row
= desired_matrix
->rows
;
4243 end
= row
+ desired_matrix
->nrows
- 1;
4245 if (row
->mode_line_p
)
4247 header_line_row
= row
;
4251 header_line_row
= NULL
;
4253 /* Update the mode line, if necessary. */
4254 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4255 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4257 mode_line_row
->y
= yb
;
4258 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4260 &mouse_face_overwritten_p
);
4263 /* Find first enabled row. Optimizations in redisplay_internal
4264 may lead to an update with only one row enabled. There may
4265 be also completely empty matrices. */
4266 while (row
< end
&& !row
->enabled_p
)
4269 /* Try reusing part of the display by copying. */
4270 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4272 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4275 /* All rows were found to be equal. */
4281 /* We've scrolled the display. */
4287 /* Update the rest of the lines. */
4288 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4291 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4294 /* We'll have to play a little bit with when to
4295 detect_input_pending. If it's done too often,
4296 scrolling large windows with repeated scroll-up
4297 commands will too quickly pause redisplay. */
4298 #if PERIODIC_PREEMPTION_CHECKING
4302 EMACS_GET_TIME (tm
);
4303 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4304 if (EMACS_TIME_NEG_P (dif
))
4306 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4307 if (detect_input_pending_ignore_squeezables ())
4312 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4313 detect_input_pending_ignore_squeezables ();
4315 changed_p
|= update_window_line (w
, vpos
,
4316 &mouse_face_overwritten_p
);
4318 /* Mark all rows below the last visible one in the current
4319 matrix as invalid. This is necessary because of
4320 variable line heights. Consider the case of three
4321 successive redisplays, where the first displays 5
4322 lines, the second 3 lines, and the third 5 lines again.
4323 If the second redisplay wouldn't mark rows in the
4324 current matrix invalid, the third redisplay might be
4325 tempted to optimize redisplay based on lines displayed
4326 in the first redisplay. */
4327 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4328 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4329 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4332 /* Was display preempted? */
4333 paused_p
= row
< end
;
4337 /* Update the header line after scrolling because a new header
4338 line would otherwise overwrite lines at the top of the window
4339 that can be scrolled. */
4340 if (header_line_row
&& header_line_row
->enabled_p
)
4342 header_line_row
->y
= 0;
4343 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4346 /* Fix the appearance of overlapping/overlapped rows. */
4347 if (!paused_p
&& !w
->pseudo_window_p
)
4349 #ifdef HAVE_WINDOW_SYSTEM
4350 if (changed_p
&& rif
->fix_overlapping_area
)
4352 redraw_overlapped_rows (w
, yb
);
4353 redraw_overlapping_rows (w
, yb
);
4357 /* Make cursor visible at cursor position of W. */
4358 set_window_cursor_after_update (w
);
4360 #if 0 /* Check that current matrix invariants are satisfied. This is
4361 for debugging only. See the comment of check_matrix_invariants. */
4362 IF_DEBUG (check_matrix_invariants (w
));
4367 /* Remember the redisplay method used to display the matrix. */
4368 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4371 #ifdef HAVE_WINDOW_SYSTEM
4372 update_window_fringes (w
, 0);
4375 /* End the update of window W. Don't set the cursor if we
4376 paused updating the display because in this case,
4377 set_window_cursor_after_update hasn't been called, and
4378 output_cursor doesn't contain the cursor location. */
4379 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4385 /* check_current_matrix_flags (w); */
4386 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4389 clear_glyph_matrix (desired_matrix
);
4395 /* Update the display of area AREA in window W, row number VPOS.
4396 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4399 update_marginal_area (w
, area
, vpos
)
4403 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4404 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4406 /* Let functions in xterm.c know what area subsequent X positions
4407 will be relative to. */
4408 updated_area
= area
;
4410 /* Set cursor to start of glyphs, write them, and clear to the end
4411 of the area. I don't think that something more sophisticated is
4412 necessary here, since marginal areas will not be the default. */
4413 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4414 if (desired_row
->used
[area
])
4415 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4416 rif
->clear_end_of_line (-1);
4420 /* Update the display of the text area of row VPOS in window W.
4421 Value is non-zero if display has changed. */
4424 update_text_area (w
, vpos
)
4428 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4429 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4430 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4433 /* Let functions in xterm.c know what area subsequent X positions
4434 will be relative to. */
4435 updated_area
= TEXT_AREA
;
4437 /* If rows are at different X or Y, or rows have different height,
4438 or the current row is marked invalid, write the entire line. */
4439 if (!current_row
->enabled_p
4440 || desired_row
->y
!= current_row
->y
4441 || desired_row
->ascent
!= current_row
->ascent
4442 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4443 || desired_row
->phys_height
!= current_row
->phys_height
4444 || desired_row
->visible_height
!= current_row
->visible_height
4445 || current_row
->overlapped_p
4446 /* This next line is necessary for correctly redrawing
4447 mouse-face areas after scrolling and other operations.
4448 However, it causes excessive flickering when mouse is moved
4449 across the mode line. Luckily, turning it off for the mode
4450 line doesn't seem to hurt anything. -- cyd.
4451 But it is still needed for the header line. -- kfs. */
4452 || (current_row
->mouse_face_p
4453 && !(current_row
->mode_line_p
&& vpos
> 0))
4454 || current_row
->x
!= desired_row
->x
)
4456 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4458 if (desired_row
->used
[TEXT_AREA
])
4459 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4460 desired_row
->used
[TEXT_AREA
]);
4462 /* Clear to end of window. */
4463 rif
->clear_end_of_line (-1);
4466 /* This erases the cursor. We do this here because
4467 notice_overwritten_cursor cannot easily check this, which
4468 might indicate that the whole functionality of
4469 notice_overwritten_cursor would better be implemented here.
4470 On the other hand, we need notice_overwritten_cursor as long
4471 as mouse highlighting is done asynchronously outside of
4473 if (vpos
== w
->phys_cursor
.vpos
)
4474 w
->phys_cursor_on_p
= 0;
4479 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4480 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4481 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4482 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4483 int abort_skipping
= 0;
4485 /* If the desired row extends its face to the text area end, and
4486 unless the current row also does so at the same position,
4487 make sure we write at least one glyph, so that the face
4488 extension actually takes place. */
4489 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4490 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4491 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4492 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4495 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4499 /* Loop over glyphs that current and desired row may have
4503 int can_skip_p
= !abort_skipping
;
4505 /* Skip over glyphs that both rows have in common. These
4506 don't have to be written. We can't skip if the last
4507 current glyph overlaps the glyph to its right. For
4508 example, consider a current row of `if ' with the `f' in
4509 Courier bold so that it overlaps the ` ' to its right.
4510 If the desired row is ` ', we would skip over the space
4511 after the `if' and there would remain a pixel from the
4512 `f' on the screen. */
4513 if (overlapping_glyphs_p
&& i
> 0)
4515 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4518 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4520 can_skip_p
= (right
== 0 && !abort_skipping
);
4528 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4530 x
+= desired_glyph
->pixel_width
;
4531 ++desired_glyph
, ++current_glyph
, ++i
;
4534 /* Consider the case that the current row contains "xxx
4535 ppp ggg" in italic Courier font, and the desired row
4536 is "xxx ggg". The character `p' has lbearing, `g'
4537 has not. The loop above will stop in front of the
4538 first `p' in the current row. If we would start
4539 writing glyphs there, we wouldn't erase the lbearing
4540 of the `p'. The rest of the lbearing problem is then
4541 taken care of by draw_glyphs. */
4542 if (overlapping_glyphs_p
4544 && i
< current_row
->used
[TEXT_AREA
]
4545 && (current_row
->used
[TEXT_AREA
]
4546 != desired_row
->used
[TEXT_AREA
]))
4550 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4552 while (left
> 0 && i
> 0)
4554 --i
, --desired_glyph
, --current_glyph
;
4555 x
-= desired_glyph
->pixel_width
;
4556 left
-= desired_glyph
->pixel_width
;
4559 /* Abort the skipping algorithm if we end up before
4560 our starting point, to avoid looping (bug#1070).
4561 This can happen when the lbearing is larger than
4563 abort_skipping
= (i
< start_hpos
);
4567 /* Try to avoid writing the entire rest of the desired row
4568 by looking for a resync point. This mainly prevents
4569 mode line flickering in the case the mode line is in
4570 fixed-pitch font, which it usually will be. */
4571 if (i
< desired_row
->used
[TEXT_AREA
])
4573 int start_x
= x
, start_hpos
= i
;
4574 struct glyph
*start
= desired_glyph
;
4576 int skip_first_p
= !can_skip_p
;
4578 /* Find the next glyph that's equal again. */
4581 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4584 x
+= desired_glyph
->pixel_width
;
4585 current_x
+= current_glyph
->pixel_width
;
4586 ++desired_glyph
, ++current_glyph
, ++i
;
4590 if (i
== start_hpos
|| x
!= current_x
)
4594 desired_glyph
= start
;
4598 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4599 rif
->write_glyphs (start
, i
- start_hpos
);
4604 /* Write the rest. */
4605 if (i
< desired_row
->used
[TEXT_AREA
])
4607 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4608 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4612 /* Maybe clear to end of line. */
4613 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4615 /* If new row extends to the end of the text area, nothing
4616 has to be cleared, if and only if we did a write_glyphs
4617 above. This is made sure by setting desired_stop_pos
4618 appropriately above. */
4619 xassert (i
< desired_row
->used
[TEXT_AREA
]
4620 || ((desired_row
->used
[TEXT_AREA
]
4621 == current_row
->used
[TEXT_AREA
])
4622 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4624 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4626 /* If old row extends to the end of the text area, clear. */
4627 if (i
>= desired_row
->used
[TEXT_AREA
])
4628 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4629 desired_row
->pixel_width
);
4630 rif
->clear_end_of_line (-1);
4633 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4635 /* Otherwise clear to the end of the old row. Everything
4636 after that position should be clear already. */
4639 if (i
>= desired_row
->used
[TEXT_AREA
])
4640 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4641 desired_row
->pixel_width
);
4643 /* If cursor is displayed at the end of the line, make sure
4644 it's cleared. Nowadays we don't have a phys_cursor_glyph
4645 with which to erase the cursor (because this method
4646 doesn't work with lbearing/rbearing), so we must do it
4648 if (vpos
== w
->phys_cursor
.vpos
4649 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4651 w
->phys_cursor_on_p
= 0;
4655 x
= current_row
->pixel_width
;
4656 rif
->clear_end_of_line (x
);
4665 /* Update row VPOS in window W. Value is non-zero if display has been
4669 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4671 int vpos
, *mouse_face_overwritten_p
;
4673 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4674 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4675 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4678 /* Set the row being updated. This is important to let xterm.c
4679 know what line height values are in effect. */
4680 updated_row
= desired_row
;
4682 /* A row can be completely invisible in case a desired matrix was
4683 built with a vscroll and then make_cursor_line_fully_visible shifts
4684 the matrix. Make sure to make such rows current anyway, since
4685 we need the correct y-position, for example, in the current matrix. */
4686 if (desired_row
->mode_line_p
4687 || desired_row
->visible_height
> 0)
4689 xassert (desired_row
->enabled_p
);
4691 /* Update display of the left margin area, if there is one. */
4692 if (!desired_row
->full_width_p
4693 && !NILP (w
->left_margin_cols
))
4696 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4699 /* Update the display of the text area. */
4700 if (update_text_area (w
, vpos
))
4703 if (current_row
->mouse_face_p
)
4704 *mouse_face_overwritten_p
= 1;
4707 /* Update display of the right margin area, if there is one. */
4708 if (!desired_row
->full_width_p
4709 && !NILP (w
->right_margin_cols
))
4712 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4715 /* Draw truncation marks etc. */
4716 if (!current_row
->enabled_p
4717 || desired_row
->y
!= current_row
->y
4718 || desired_row
->visible_height
!= current_row
->visible_height
4719 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4720 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4721 || current_row
->redraw_fringe_bitmaps_p
4722 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4723 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4724 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4725 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4726 rif
->after_update_window_line_hook (desired_row
);
4729 /* Update current_row from desired_row. */
4730 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4736 /* Set the cursor after an update of window W. This function may only
4737 be called from update_window. */
4740 set_window_cursor_after_update (w
)
4743 struct frame
*f
= XFRAME (w
->frame
);
4744 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4745 int cx
, cy
, vpos
, hpos
;
4747 /* Not intended for frame matrix updates. */
4748 xassert (FRAME_WINDOW_P (f
));
4750 if (cursor_in_echo_area
4751 && !NILP (echo_area_buffer
[0])
4752 /* If we are showing a message instead of the mini-buffer,
4753 show the cursor for the message instead. */
4754 && XWINDOW (minibuf_window
) == w
4755 && EQ (minibuf_window
, echo_area_window
)
4756 /* These cases apply only to the frame that contains
4757 the active mini-buffer window. */
4758 && FRAME_HAS_MINIBUF_P (f
)
4759 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4761 cx
= cy
= vpos
= hpos
= 0;
4763 if (cursor_in_echo_area
>= 0)
4765 /* If the mini-buffer is several lines high, find the last
4766 line that has any text on it. Note: either all lines
4767 are enabled or none. Otherwise we wouldn't be able to
4769 struct glyph_row
*row
, *last_row
;
4770 struct glyph
*glyph
;
4771 int yb
= window_text_bottom_y (w
);
4774 row
= w
->current_matrix
->rows
;
4775 while (row
->enabled_p
4776 && (last_row
== NULL
4777 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4779 if (row
->used
[TEXT_AREA
]
4780 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4787 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4788 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4790 while (last
> start
&& last
->charpos
< 0)
4793 for (glyph
= start
; glyph
< last
; ++glyph
)
4795 cx
+= glyph
->pixel_width
;
4800 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4808 hpos
= w
->cursor
.hpos
;
4809 vpos
= w
->cursor
.vpos
;
4812 /* Window cursor can be out of sync for horizontally split windows. */
4813 hpos
= max (0, hpos
);
4814 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4815 vpos
= max (0, vpos
);
4816 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4817 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4821 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4822 tree rooted at W. */
4825 set_window_update_flags (w
, on_p
)
4831 if (!NILP (w
->hchild
))
4832 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4833 else if (!NILP (w
->vchild
))
4834 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4836 w
->must_be_updated_p
= on_p
;
4838 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4844 /***********************************************************************
4845 Window-Based Scrolling
4846 ***********************************************************************/
4848 /* Structure describing rows in scrolling_window. */
4852 /* Number of occurrences of this row in desired and current matrix. */
4853 int old_uses
, new_uses
;
4855 /* Vpos of row in new matrix. */
4856 int new_line_number
;
4858 /* Bucket index of this row_entry in the hash table row_table. */
4861 /* The row described by this entry. */
4862 struct glyph_row
*row
;
4864 /* Hash collision chain. */
4865 struct row_entry
*next
;
4868 /* A pool to allocate row_entry structures from, and the size of the
4869 pool. The pool is reallocated in scrolling_window when we find
4870 that we need a larger one. */
4872 static struct row_entry
*row_entry_pool
;
4873 static int row_entry_pool_size
;
4875 /* Index of next free entry in row_entry_pool. */
4877 static int row_entry_idx
;
4879 /* The hash table used during scrolling, and the table's size. This
4880 table is used to quickly identify equal rows in the desired and
4883 static struct row_entry
**row_table
;
4884 static int row_table_size
;
4886 /* Vectors of pointers to row_entry structures belonging to the
4887 current and desired matrix, and the size of the vectors. */
4889 static struct row_entry
**old_lines
, **new_lines
;
4890 static int old_lines_size
, new_lines_size
;
4892 /* A pool to allocate run structures from, and its size. */
4894 static struct run
*run_pool
;
4895 static int runs_size
;
4897 /* A vector of runs of lines found during scrolling. */
4899 static struct run
**runs
;
4901 /* Add glyph row ROW to the scrolling hash table during the scrolling
4904 static INLINE
struct row_entry
*
4905 add_row_entry (w
, row
)
4907 struct glyph_row
*row
;
4909 struct row_entry
*entry
;
4910 int i
= row
->hash
% row_table_size
;
4912 entry
= row_table
[i
];
4913 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4914 entry
= entry
->next
;
4918 entry
= row_entry_pool
+ row_entry_idx
++;
4920 entry
->old_uses
= entry
->new_uses
= 0;
4921 entry
->new_line_number
= 0;
4923 entry
->next
= row_table
[i
];
4924 row_table
[i
] = entry
;
4931 /* Try to reuse part of the current display of W by scrolling lines.
4932 HEADER_LINE_P non-zero means W has a header line.
4934 The algorithm is taken from Communications of the ACM, Apr78 "A
4935 Technique for Isolating Differences Between Files." It should take
4938 A short outline of the steps of the algorithm
4940 1. Skip lines equal at the start and end of both matrices.
4942 2. Enter rows in the current and desired matrix into a symbol
4943 table, counting how often they appear in both matrices.
4945 3. Rows that appear exactly once in both matrices serve as anchors,
4946 i.e. we assume that such lines are likely to have been moved.
4948 4. Starting from anchor lines, extend regions to be scrolled both
4949 forward and backward.
4953 -1 if all rows were found to be equal.
4954 0 to indicate that we did not scroll the display, or
4955 1 if we did scroll. */
4958 scrolling_window (w
, header_line_p
)
4962 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4963 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4964 int yb
= window_text_bottom_y (w
);
4965 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4966 int nruns
, nbytes
, n
, run_idx
;
4967 struct row_entry
*entry
;
4968 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4970 /* Skip over rows equal at the start. */
4971 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4973 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4974 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4978 && !d
->redraw_fringe_bitmaps_p
4980 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4981 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4982 && row_equal_p (w
, c
, d
, 1))
4991 /* Give up if some rows in the desired matrix are not enabled. */
4992 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4995 first_old
= first_new
= i
;
4997 /* Set last_new to the index + 1 of the last enabled row in the
5000 while (i
< desired_matrix
->nrows
- 1
5001 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
5002 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
5005 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
5010 /* Set last_old to the index + 1 of the last enabled row in the
5011 current matrix. We don't look at the enabled flag here because
5012 we plan to reuse part of the display even if other parts are
5015 while (i
< current_matrix
->nrows
- 1)
5017 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
5026 /* Skip over rows equal at the bottom. */
5029 while (i
- 1 > first_new
5030 && j
- 1 > first_old
5031 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
5032 && (MATRIX_ROW (current_matrix
, i
- 1)->y
5033 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
5034 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
5036 MATRIX_ROW (desired_matrix
, i
- 1),
5037 MATRIX_ROW (current_matrix
, j
- 1), 1))
5042 /* Nothing to do if all rows are equal. */
5043 if (last_new
== first_new
)
5046 /* Reallocate vectors, tables etc. if necessary. */
5048 if (current_matrix
->nrows
> old_lines_size
)
5050 old_lines_size
= current_matrix
->nrows
;
5051 nbytes
= old_lines_size
* sizeof *old_lines
;
5052 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5055 if (desired_matrix
->nrows
> new_lines_size
)
5057 new_lines_size
= desired_matrix
->nrows
;
5058 nbytes
= new_lines_size
* sizeof *new_lines
;
5059 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5062 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5063 if (3 * n
> row_table_size
)
5065 row_table_size
= next_almost_prime (3 * n
);
5066 nbytes
= row_table_size
* sizeof *row_table
;
5067 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5068 bzero (row_table
, nbytes
);
5071 if (n
> row_entry_pool_size
)
5073 row_entry_pool_size
= n
;
5074 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5075 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5078 if (desired_matrix
->nrows
> runs_size
)
5080 runs_size
= desired_matrix
->nrows
;
5081 nbytes
= runs_size
* sizeof *runs
;
5082 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5083 nbytes
= runs_size
* sizeof *run_pool
;
5084 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5087 nruns
= run_idx
= 0;
5090 /* Add rows from the current and desired matrix to the hash table
5091 row_hash_table to be able to find equal ones quickly. */
5093 for (i
= first_old
; i
< last_old
; ++i
)
5095 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5097 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5098 old_lines
[i
] = entry
;
5102 old_lines
[i
] = NULL
;
5105 for (i
= first_new
; i
< last_new
; ++i
)
5107 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5108 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5110 entry
->new_line_number
= i
;
5111 new_lines
[i
] = entry
;
5114 /* Identify moves based on lines that are unique and equal
5115 in both matrices. */
5116 for (i
= first_old
; i
< last_old
;)
5118 && old_lines
[i
]->old_uses
== 1
5119 && old_lines
[i
]->new_uses
== 1)
5122 int new_line
= old_lines
[i
]->new_line_number
;
5123 struct run
*run
= run_pool
+ run_idx
++;
5126 run
->current_vpos
= i
;
5127 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5128 run
->desired_vpos
= new_line
;
5129 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5131 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5133 /* Extend backward. */
5136 while (j
> first_old
5138 && old_lines
[j
] == new_lines
[k
])
5140 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5141 --run
->current_vpos
;
5142 --run
->desired_vpos
;
5145 run
->desired_y
-= h
;
5146 run
->current_y
-= h
;
5150 /* Extend forward. */
5155 && old_lines
[j
] == new_lines
[k
])
5157 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5163 /* Insert run into list of all runs. Order runs by copied
5164 pixel lines. Note that we record runs that don't have to
5165 be copied because they are already in place. This is done
5166 because we can avoid calling update_window_line in this
5168 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5170 for (k
= nruns
; k
> j
; --k
)
5171 runs
[k
] = runs
[k
- 1];
5180 /* Do the moves. Do it in a way that we don't overwrite something
5181 we want to copy later on. This is not solvable in general
5182 because there is only one display and we don't have a way to
5183 exchange areas on this display. Example:
5185 +-----------+ +-----------+
5187 +-----------+ --> +-----------+
5189 +-----------+ +-----------+
5191 Instead, prefer bigger moves, and invalidate moves that would
5192 copy from where we copied to. */
5194 for (i
= 0; i
< nruns
; ++i
)
5195 if (runs
[i
]->nrows
> 0)
5197 struct run
*r
= runs
[i
];
5199 /* Copy on the display. */
5200 if (r
->current_y
!= r
->desired_y
)
5202 rif
->scroll_run_hook (w
, r
);
5204 /* Invalidate runs that copy from where we copied to. */
5205 for (j
= i
+ 1; j
< nruns
; ++j
)
5207 struct run
*p
= runs
[j
];
5209 if ((p
->current_y
>= r
->desired_y
5210 && p
->current_y
< r
->desired_y
+ r
->height
)
5211 || (p
->current_y
+ p
->height
>= r
->desired_y
5212 && (p
->current_y
+ p
->height
5213 < r
->desired_y
+ r
->height
)))
5218 /* Assign matrix rows. */
5219 for (j
= 0; j
< r
->nrows
; ++j
)
5221 struct glyph_row
*from
, *to
;
5222 int to_overlapped_p
;
5224 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5225 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5226 to_overlapped_p
= to
->overlapped_p
;
5227 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5228 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5229 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5230 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5231 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5232 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5233 from
->redraw_fringe_bitmaps_p
= 1;
5234 assign_row (to
, from
);
5235 to
->enabled_p
= 1, from
->enabled_p
= 0;
5236 to
->overlapped_p
= to_overlapped_p
;
5240 /* Clear the hash table, for the next time. */
5241 for (i
= 0; i
< row_entry_idx
; ++i
)
5242 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5244 /* Value is > 0 to indicate that we scrolled the display. */
5250 /************************************************************************
5252 ************************************************************************/
5254 /* Update the desired frame matrix of frame F.
5256 FORCE_P non-zero means that the update should not be stopped by
5257 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5258 should not be tried.
5260 Value is non-zero if update was stopped due to pending input. */
5263 update_frame_1 (f
, force_p
, inhibit_id_p
)
5268 /* Frame matrices to work on. */
5269 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5270 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5273 int preempt_count
= baud_rate
/ 2400 + 1;
5274 extern int input_pending
;
5276 xassert (current_matrix
&& desired_matrix
);
5278 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5279 calculate_costs (f
);
5281 if (preempt_count
<= 0)
5284 #if !PERIODIC_PREEMPTION_CHECKING
5285 if (!force_p
&& detect_input_pending_ignore_squeezables ())
5292 /* If we cannot insert/delete lines, it's no use trying it. */
5293 if (!FRAME_LINE_INS_DEL_OK (f
))
5296 /* See if any of the desired lines are enabled; don't compute for
5297 i/d line if just want cursor motion. */
5298 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5299 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5302 /* Try doing i/d line, if not yet inhibited. */
5303 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5304 force_p
|= scrolling (f
);
5306 /* Update the individual lines as needed. Do bottom line first. */
5307 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5308 update_frame_line (f
, desired_matrix
->nrows
- 1);
5310 /* Now update the rest of the lines. */
5311 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5313 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5315 if (FRAME_TERMCAP_P (f
))
5317 /* Flush out every so many lines.
5318 Also flush out if likely to have more than 1k buffered
5319 otherwise. I'm told that some telnet connections get
5320 really screwed by more than 1k output at once. */
5321 FILE *display_output
= FRAME_TTY (f
)->output
;
5324 int outq
= PENDING_OUTPUT_COUNT (display_output
);
5326 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5328 fflush (display_output
);
5329 if (preempt_count
== 1)
5331 #ifdef EMACS_OUTQSIZE
5332 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5333 /* Probably not a tty. Ignore the error and reset
5335 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5338 if (baud_rate
<= outq
&& baud_rate
> 0)
5339 sleep (outq
/ baud_rate
);
5345 #if PERIODIC_PREEMPTION_CHECKING
5349 EMACS_GET_TIME (tm
);
5350 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5351 if (EMACS_TIME_NEG_P (dif
))
5353 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5354 if (detect_input_pending_ignore_squeezables ())
5359 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5360 detect_input_pending_ignore_squeezables ();
5363 update_frame_line (f
, i
);
5367 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5369 /* Now just clean up termcap drivers and set cursor, etc. */
5372 if ((cursor_in_echo_area
5373 /* If we are showing a message instead of the mini-buffer,
5374 show the cursor for the message instead of for the
5375 (now hidden) mini-buffer contents. */
5376 || (EQ (minibuf_window
, selected_window
)
5377 && EQ (minibuf_window
, echo_area_window
)
5378 && !NILP (echo_area_buffer
[0])))
5379 /* These cases apply only to the frame that contains
5380 the active mini-buffer window. */
5381 && FRAME_HAS_MINIBUF_P (f
)
5382 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5384 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5387 if (cursor_in_echo_area
< 0)
5389 /* Negative value of cursor_in_echo_area means put
5390 cursor at beginning of line. */
5396 /* Positive value of cursor_in_echo_area means put
5397 cursor at the end of the prompt. If the mini-buffer
5398 is several lines high, find the last line that has
5400 row
= FRAME_LINES (f
);
5406 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5408 /* Frame rows are filled up with spaces that
5409 must be ignored here. */
5410 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5412 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5413 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5416 && (last
- 1)->charpos
< 0)
5422 while (row
> top
&& col
== 0);
5424 /* Make sure COL is not out of range. */
5425 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5427 /* If we have another row, advance cursor into it. */
5428 if (row
< FRAME_LINES (f
) - 1)
5430 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5433 /* Otherwise move it back in range. */
5435 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5439 cursor_to (f
, row
, col
);
5443 /* We have only one cursor on terminal frames. Use it to
5444 display the cursor of the selected window. */
5445 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5446 if (w
->cursor
.vpos
>= 0
5447 /* The cursor vpos may be temporarily out of bounds
5448 in the following situation: There is one window,
5449 with the cursor in the lower half of it. The window
5450 is split, and a message causes a redisplay before
5451 a new cursor position has been computed. */
5452 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5454 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5455 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5457 if (INTEGERP (w
->left_margin_cols
))
5458 x
+= XFASTINT (w
->left_margin_cols
);
5460 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5461 cursor_to (f
, y
, x
);
5468 clear_desired_matrices (f
);
5473 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5477 struct frame
*frame
;
5479 int unchanged_at_top
, unchanged_at_bottom
;
5482 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5483 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5484 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5485 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5487 int free_at_end_vpos
= FRAME_LINES (frame
);
5488 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5489 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5491 if (!current_matrix
)
5494 /* Compute hash codes of all the lines. Also calculate number of
5495 changed lines, number of unchanged lines at the beginning, and
5496 number of unchanged lines at the end. */
5498 unchanged_at_top
= 0;
5499 unchanged_at_bottom
= FRAME_LINES (frame
);
5500 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5502 /* Give up on this scrolling if some old lines are not enabled. */
5503 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5505 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5506 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5508 /* This line cannot be redrawn, so don't let scrolling mess it. */
5509 new_hash
[i
] = old_hash
[i
];
5510 #define INFINITY 1000000 /* Taken from scroll.c */
5511 draw_cost
[i
] = INFINITY
;
5515 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5516 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5519 if (old_hash
[i
] != new_hash
[i
])
5522 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5524 else if (i
== unchanged_at_top
)
5526 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5529 /* If changed lines are few, don't allow preemption, don't scroll. */
5530 if ((!FRAME_SCROLL_REGION_OK (frame
)
5531 && changed_lines
< baud_rate
/ 2400)
5532 || unchanged_at_bottom
== FRAME_LINES (frame
))
5535 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5536 - unchanged_at_bottom
);
5538 if (FRAME_SCROLL_REGION_OK (frame
))
5539 free_at_end_vpos
-= unchanged_at_bottom
;
5540 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5541 free_at_end_vpos
= -1;
5543 /* If large window, fast terminal and few lines in common between
5544 current frame and desired frame, don't bother with i/d calc. */
5545 if (!FRAME_SCROLL_REGION_OK (frame
)
5546 && window_size
>= 18 && baud_rate
> 2400
5548 10 * scrolling_max_lines_saved (unchanged_at_top
,
5549 FRAME_LINES (frame
) - unchanged_at_bottom
,
5550 old_hash
, new_hash
, draw_cost
)))
5553 if (window_size
< 2)
5556 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5557 draw_cost
+ unchanged_at_top
- 1,
5558 old_draw_cost
+ unchanged_at_top
- 1,
5559 old_hash
+ unchanged_at_top
- 1,
5560 new_hash
+ unchanged_at_top
- 1,
5561 free_at_end_vpos
- unchanged_at_top
);
5567 /* Count the number of blanks at the start of the vector of glyphs R
5568 which is LEN glyphs long. */
5571 count_blanks (r
, len
)
5577 for (i
= 0; i
< len
; ++i
)
5578 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5585 /* Count the number of glyphs in common at the start of the glyph
5586 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5587 of STR2. Value is the number of equal glyphs equal at the start. */
5590 count_match (str1
, end1
, str2
, end2
)
5591 struct glyph
*str1
, *end1
, *str2
, *end2
;
5593 struct glyph
*p1
= str1
;
5594 struct glyph
*p2
= str2
;
5598 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5605 /* Char insertion/deletion cost vector, from term.c */
5607 extern int *char_ins_del_vector
;
5608 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5611 /* Perform a frame-based update on line VPOS in frame FRAME. */
5614 update_frame_line (f
, vpos
)
5618 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5620 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5621 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5622 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5623 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5624 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5625 int must_write_whole_line_p
;
5626 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5627 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5628 != FACE_TTY_DEFAULT_BG_COLOR
);
5630 if (colored_spaces_p
)
5633 /* Current row not enabled means it has unknown contents. We must
5634 write the whole desired line in that case. */
5635 must_write_whole_line_p
= !current_row
->enabled_p
;
5636 if (must_write_whole_line_p
)
5643 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5644 olen
= current_row
->used
[TEXT_AREA
];
5646 /* Ignore trailing spaces, if we can. */
5647 if (!write_spaces_p
)
5648 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5652 current_row
->enabled_p
= 1;
5653 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5655 /* If desired line is empty, just clear the line. */
5656 if (!desired_row
->enabled_p
)
5662 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5663 nlen
= desired_row
->used
[TEXT_AREA
];
5664 nend
= nbody
+ nlen
;
5666 /* If display line has unknown contents, write the whole line. */
5667 if (must_write_whole_line_p
)
5669 /* Ignore spaces at the end, if we can. */
5670 if (!write_spaces_p
)
5671 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5674 /* Write the contents of the desired line. */
5677 cursor_to (f
, vpos
, 0);
5678 write_glyphs (f
, nbody
, nlen
);
5681 /* Don't call clear_end_of_line if we already wrote the whole
5682 line. The cursor will not be at the right margin in that
5683 case but in the line below. */
5684 if (nlen
< FRAME_TOTAL_COLS (f
))
5686 cursor_to (f
, vpos
, nlen
);
5687 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5690 /* Make sure we are in the right row, otherwise cursor movement
5691 with cmgoto might use `ch' in the wrong row. */
5692 cursor_to (f
, vpos
, 0);
5694 make_current (desired_matrix
, current_matrix
, vpos
);
5698 /* Pretend trailing spaces are not there at all,
5699 unless for one reason or another we must write all spaces. */
5700 if (!write_spaces_p
)
5701 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5704 /* If there's no i/d char, quickly do the best we can without it. */
5705 if (!FRAME_CHAR_INS_DEL_OK (f
))
5709 /* Find the first glyph in desired row that doesn't agree with
5710 a glyph in the current row, and write the rest from there on. */
5711 for (i
= 0; i
< nlen
; i
++)
5713 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5715 /* Find the end of the run of different glyphs. */
5719 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5720 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5723 /* Output this run of non-matching chars. */
5724 cursor_to (f
, vpos
, i
);
5725 write_glyphs (f
, nbody
+ i
, j
- i
);
5728 /* Now find the next non-match. */
5732 /* Clear the rest of the line, or the non-clear part of it. */
5735 cursor_to (f
, vpos
, nlen
);
5736 clear_end_of_line (f
, olen
);
5739 /* Make current row = desired row. */
5740 make_current (desired_matrix
, current_matrix
, vpos
);
5744 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5745 characters in a row. */
5749 /* If current line is blank, skip over initial spaces, if
5750 possible, and write the rest. */
5754 nsp
= count_blanks (nbody
, nlen
);
5758 cursor_to (f
, vpos
, nsp
);
5759 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5762 /* Exchange contents between current_frame and new_frame. */
5763 make_current (desired_matrix
, current_matrix
, vpos
);
5767 /* Compute number of leading blanks in old and new contents. */
5768 osp
= count_blanks (obody
, olen
);
5769 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5771 /* Compute number of matching chars starting with first non-blank. */
5772 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5773 nbody
+ nsp
, nbody
+ nlen
);
5775 /* Spaces in new match implicit space past the end of old. */
5776 /* A bug causing this to be a no-op was fixed in 18.29. */
5777 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5780 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5784 /* Avoid doing insert/delete char
5785 just cause number of leading spaces differs
5786 when the following text does not match. */
5787 if (begmatch
== 0 && osp
!= nsp
)
5788 osp
= nsp
= min (osp
, nsp
);
5790 /* Find matching characters at end of line */
5793 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5795 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5800 endmatch
= obody
+ olen
- op1
;
5802 /* tem gets the distance to insert or delete.
5803 endmatch is how many characters we save by doing so.
5806 tem
= (nlen
- nsp
) - (olen
- osp
);
5808 && (!FRAME_CHAR_INS_DEL_OK (f
)
5809 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5812 /* nsp - osp is the distance to insert or delete.
5813 If that is nonzero, begmatch is known to be nonzero also.
5814 begmatch + endmatch is how much we save by doing the ins/del.
5818 && (!FRAME_CHAR_INS_DEL_OK (f
)
5819 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5823 osp
= nsp
= min (osp
, nsp
);
5826 /* Now go through the line, inserting, writing and
5827 deleting as appropriate. */
5831 cursor_to (f
, vpos
, nsp
);
5832 delete_glyphs (f
, osp
- nsp
);
5836 /* If going to delete chars later in line
5837 and insert earlier in the line,
5838 must delete first to avoid losing data in the insert */
5839 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5841 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5842 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5843 olen
= nlen
- (nsp
- osp
);
5845 cursor_to (f
, vpos
, osp
);
5846 insert_glyphs (f
, 0, nsp
- osp
);
5850 tem
= nsp
+ begmatch
+ endmatch
;
5851 if (nlen
!= tem
|| olen
!= tem
)
5853 if (!endmatch
|| nlen
== olen
)
5855 /* If new text being written reaches right margin, there is
5856 no need to do clear-to-eol at the end of this function
5857 (and it would not be safe, since cursor is not going to
5858 be "at the margin" after the text is done). */
5859 if (nlen
== FRAME_TOTAL_COLS (f
))
5862 /* Function write_glyphs is prepared to do nothing
5863 if passed a length <= 0. Check it here to avoid
5864 unnecessary cursor movement. */
5867 cursor_to (f
, vpos
, nsp
+ begmatch
);
5868 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5871 else if (nlen
> olen
)
5873 /* Here, we used to have the following simple code:
5874 ----------------------------------------
5875 write_glyphs (nbody + nsp + begmatch, olen - tem);
5876 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5877 ----------------------------------------
5878 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5879 is a padding glyph. */
5880 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5883 cursor_to (f
, vpos
, nsp
+ begmatch
);
5885 /* Calculate columns we can actually overwrite. */
5886 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5888 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5890 /* If we left columns to be overwritten, we must delete them. */
5891 del
= olen
- tem
- out
;
5893 delete_glyphs (f
, del
);
5895 /* At last, we insert columns not yet written out. */
5896 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5899 else if (olen
> nlen
)
5901 cursor_to (f
, vpos
, nsp
+ begmatch
);
5902 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5903 delete_glyphs (f
, olen
- nlen
);
5909 /* If any unerased characters remain after the new line, erase them. */
5912 cursor_to (f
, vpos
, nlen
);
5913 clear_end_of_line (f
, olen
);
5916 /* Exchange contents between current_frame and new_frame. */
5917 make_current (desired_matrix
, current_matrix
, vpos
);
5922 /***********************************************************************
5923 X/Y Position -> Buffer Position
5924 ***********************************************************************/
5926 /* Determine what's under window-relative pixel position (*X, *Y).
5927 Return the object (string or buffer) that's there.
5928 Return in *POS the position in that object.
5929 Adjust *X and *Y to character positions. */
5932 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5935 struct display_pos
*pos
;
5936 Lisp_Object
*object
;
5938 int *width
, *height
;
5941 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5942 struct text_pos startp
;
5944 struct glyph_row
*row
;
5945 #ifdef HAVE_WINDOW_SYSTEM
5946 struct image
*img
= 0;
5950 /* We used to set current_buffer directly here, but that does the
5951 wrong thing with `face-remapping-alist' (bug#2044). */
5952 Fset_buffer (w
->buffer
);
5953 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5954 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5955 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5956 start_display (&it
, w
, startp
);
5958 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5959 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5960 MOVE_TO_X
| MOVE_TO_Y
);
5962 Fset_buffer (old_current_buffer
);
5964 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5965 *dy
= *y
- it
.current_y
;
5968 if (STRINGP (it
.string
))
5972 #ifdef HAVE_WINDOW_SYSTEM
5973 if (it
.what
== IT_IMAGE
)
5975 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5976 && !NILP (img
->spec
))
5977 *object
= img
->spec
;
5981 if (it
.vpos
< w
->current_matrix
->nrows
5982 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5985 if (it
.hpos
< row
->used
[TEXT_AREA
])
5987 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5988 #ifdef HAVE_WINDOW_SYSTEM
5991 *dy
-= row
->ascent
- glyph
->ascent
;
5992 *dx
+= glyph
->slice
.x
;
5993 *dy
+= glyph
->slice
.y
;
5994 /* Image slices positions are still relative to the entire image */
5995 *width
= img
->width
;
5996 *height
= img
->height
;
6001 *width
= glyph
->pixel_width
;
6002 *height
= glyph
->ascent
+ glyph
->descent
;
6008 *height
= row
->height
;
6013 *width
= *height
= 0;
6016 /* Add extra (default width) columns if clicked after EOL. */
6017 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
6019 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
6028 /* Value is the string under window-relative coordinates X/Y in the
6029 mode line or header line (PART says which) of window W, or nil if none.
6030 *CHARPOS is set to the position in the string returned. */
6033 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6035 enum window_part part
;
6038 Lisp_Object
*object
;
6040 int *width
, *height
;
6042 struct glyph_row
*row
;
6043 struct glyph
*glyph
, *end
;
6045 Lisp_Object string
= Qnil
;
6047 if (part
== ON_MODE_LINE
)
6048 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
6050 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
6052 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6054 if (row
->mode_line_p
&& row
->enabled_p
)
6056 /* Find the glyph under X. If we find one with a string object,
6057 it's the one we were looking for. */
6058 glyph
= row
->glyphs
[TEXT_AREA
];
6059 end
= glyph
+ row
->used
[TEXT_AREA
];
6060 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6061 x0
-= glyph
->pixel_width
;
6062 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6065 string
= glyph
->object
;
6066 *charpos
= glyph
->charpos
;
6067 *width
= glyph
->pixel_width
;
6068 *height
= glyph
->ascent
+ glyph
->descent
;
6069 #ifdef HAVE_WINDOW_SYSTEM
6070 if (glyph
->type
== IMAGE_GLYPH
)
6073 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6075 *object
= img
->spec
;
6076 y0
-= row
->ascent
- glyph
->ascent
;
6082 /* Add extra (default width) columns if clicked after EOL. */
6083 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6085 *height
= row
->height
;
6092 *width
= *height
= 0;
6102 /* Value is the string under window-relative coordinates X/Y in either
6103 marginal area, or nil if none. *CHARPOS is set to the position in
6104 the string returned. */
6107 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6109 enum window_part part
;
6112 Lisp_Object
*object
;
6114 int *width
, *height
;
6116 struct glyph_row
*row
= w
->current_matrix
->rows
;
6117 struct glyph
*glyph
, *end
;
6118 int x0
, y0
, i
, wy
= *y
;
6120 Lisp_Object string
= Qnil
;
6122 if (part
== ON_LEFT_MARGIN
)
6123 area
= LEFT_MARGIN_AREA
;
6124 else if (part
== ON_RIGHT_MARGIN
)
6125 area
= RIGHT_MARGIN_AREA
;
6129 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6130 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6133 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6137 /* Find the glyph under X. If we find one with a string object,
6138 it's the one we were looking for. */
6139 if (area
== RIGHT_MARGIN_AREA
)
6140 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6141 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6142 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6143 + window_box_width (w
, LEFT_MARGIN_AREA
)
6144 + window_box_width (w
, TEXT_AREA
));
6146 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6147 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6150 glyph
= row
->glyphs
[area
];
6151 end
= glyph
+ row
->used
[area
];
6152 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6153 x0
-= glyph
->pixel_width
;
6154 *x
= glyph
- row
->glyphs
[area
];
6157 string
= glyph
->object
;
6158 *charpos
= glyph
->charpos
;
6159 *width
= glyph
->pixel_width
;
6160 *height
= glyph
->ascent
+ glyph
->descent
;
6161 #ifdef HAVE_WINDOW_SYSTEM
6162 if (glyph
->type
== IMAGE_GLYPH
)
6165 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6167 *object
= img
->spec
;
6168 y0
-= row
->ascent
- glyph
->ascent
;
6169 x0
+= glyph
->slice
.x
;
6170 y0
+= glyph
->slice
.y
;
6176 /* Add extra (default width) columns if clicked after EOL. */
6177 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6179 *height
= row
->height
;
6186 *width
= *height
= 0;
6196 /***********************************************************************
6197 Changing Frame Sizes
6198 ***********************************************************************/
6203 window_change_signal (signalnum
) /* If we don't have an argument, */
6204 int signalnum
; /* some compilers complain in signal calls. */
6210 int old_errno
= errno
;
6212 struct tty_display_info
*tty
;
6214 signal (SIGWINCH
, window_change_signal
);
6215 SIGNAL_THREAD_CHECK (signalnum
);
6217 /* The frame size change obviously applies to a single
6218 termcap-controlled terminal, but we can't decide which.
6219 Therefore, we resize the frames corresponding to each tty.
6221 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6223 if (! tty
->term_initted
)
6226 /* Suspended tty frames have tty->input == NULL avoid trying to
6231 get_tty_size (fileno (tty
->input
), &width
, &height
);
6233 if (width
> 5 && height
> 2) {
6234 Lisp_Object tail
, frame
;
6236 FOR_EACH_FRAME (tail
, frame
)
6237 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6238 /* Record the new sizes, but don't reallocate the data
6239 structures now. Let that be done later outside of the
6241 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6247 #endif /* SIGWINCH */
6250 /* Do any change in frame size that was requested by a signal. SAFE
6251 non-zero means this function is called from a place where it is
6252 safe to change frame sizes while a redisplay is in progress. */
6255 do_pending_window_change (safe
)
6258 /* If window_change_signal should have run before, run it now. */
6259 if (redisplaying_p
&& !safe
)
6262 while (delayed_size_change
)
6264 Lisp_Object tail
, frame
;
6266 delayed_size_change
= 0;
6268 FOR_EACH_FRAME (tail
, frame
)
6270 struct frame
*f
= XFRAME (frame
);
6272 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6273 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6280 /* Change the frame height and/or width. Values may be given as zero to
6281 indicate no change is to take place.
6283 If DELAY is non-zero, then assume we're being called from a signal
6284 handler, and queue the change for later - perhaps the next
6285 redisplay. Since this tries to resize windows, we can't call it
6286 from a signal handler.
6288 SAFE non-zero means this function is called from a place where it's
6289 safe to change frame sizes while a redisplay is in progress. */
6292 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6293 register struct frame
*f
;
6294 int newheight
, newwidth
, pretend
, delay
, safe
;
6296 Lisp_Object tail
, frame
;
6298 if (FRAME_MSDOS_P (f
))
6300 /* On MS-DOS, all frames use the same screen, so a change in
6301 size affects all frames. Termcap now supports multiple
6303 FOR_EACH_FRAME (tail
, frame
)
6304 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6305 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6306 pretend
, delay
, safe
);
6309 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6313 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6314 register struct frame
*f
;
6315 int newheight
, newwidth
, pretend
, delay
, safe
;
6317 int new_frame_total_cols
;
6318 int count
= SPECPDL_INDEX ();
6320 /* If we can't deal with the change now, queue it for later. */
6321 if (delay
|| (redisplaying_p
&& !safe
))
6323 f
->new_text_lines
= newheight
;
6324 f
->new_text_cols
= newwidth
;
6325 delayed_size_change
= 1;
6329 /* This size-change overrides any pending one for this frame. */
6330 f
->new_text_lines
= 0;
6331 f
->new_text_cols
= 0;
6333 /* If an argument is zero, set it to the current value. */
6335 newheight
= FRAME_LINES (f
);
6337 newwidth
= FRAME_COLS (f
);
6339 /* Compute width of windows in F.
6340 This is the width of the frame without vertical scroll bars. */
6341 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6343 /* Round up to the smallest acceptable size. */
6344 check_frame_size (f
, &newheight
, &newwidth
);
6346 /* If we're not changing the frame size, quit now. */
6347 if (newheight
== FRAME_LINES (f
)
6348 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6354 /* We only can set screen dimensions to certain values supported
6355 by our video hardware. Try to find the smallest size greater
6356 or equal to the requested dimensions. */
6357 dos_set_window_size (&newheight
, &newwidth
);
6360 if (newheight
!= FRAME_LINES (f
))
6362 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6364 /* Frame has both root and mini-buffer. */
6365 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6366 FRAME_TOP_MARGIN (f
));
6367 set_window_height (FRAME_ROOT_WINDOW (f
),
6370 - FRAME_TOP_MARGIN (f
)),
6372 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6374 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6377 /* Frame has just one top-level window. */
6378 set_window_height (FRAME_ROOT_WINDOW (f
),
6379 newheight
- FRAME_TOP_MARGIN (f
), 2);
6381 /* MSDOS frames cannot PRETEND, as they change frame size by
6382 manipulating video hardware. */
6383 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6384 FrameRows (FRAME_TTY (f
)) = newheight
;
6387 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6389 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6390 if (FRAME_HAS_MINIBUF_P (f
))
6391 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6393 /* MSDOS frames cannot PRETEND, as they change frame size by
6394 manipulating video hardware. */
6395 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
6396 FrameCols (FRAME_TTY (f
)) = newwidth
;
6398 if (WINDOWP (f
->tool_bar_window
))
6399 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6402 FRAME_LINES (f
) = newheight
;
6403 SET_FRAME_COLS (f
, newwidth
);
6406 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6407 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6409 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6411 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6412 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6413 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6414 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6418 calculate_costs (f
);
6419 SET_FRAME_GARBAGED (f
);
6424 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6426 run_window_configuration_change_hook (f
);
6428 unbind_to (count
, Qnil
);
6433 /***********************************************************************
6434 Terminal Related Lisp Functions
6435 ***********************************************************************/
6437 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6438 1, 1, "FOpen termscript file: ",
6439 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6440 FILE = nil means just close any termscript file currently open. */)
6444 struct tty_display_info
*tty
;
6446 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
6447 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
6448 error ("Current frame is not on a tty device");
6452 if (tty
->termscript
!= 0)
6455 fclose (tty
->termscript
);
6458 tty
->termscript
= 0;
6462 file
= Fexpand_file_name (file
, Qnil
);
6463 tty
->termscript
= fopen (SDATA (file
), "w");
6464 if (tty
->termscript
== 0)
6465 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6471 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6472 Ssend_string_to_terminal
, 1, 2, 0,
6473 doc
: /* Send STRING to the terminal without alteration.
6474 Control characters in STRING will have terminal-dependent effects.
6476 Optional parameter TERMINAL specifies the tty terminal device to use.
6477 It may be a terminal object, a frame, or nil for the terminal used by
6478 the currently selected frame. In batch mode, STRING is sent to stdout
6479 when TERMINAL is nil. */)
6482 Lisp_Object terminal
;
6484 struct terminal
*t
= get_terminal (terminal
, 1);
6487 /* ??? Perhaps we should do something special for multibyte strings here. */
6488 CHECK_STRING (string
);
6492 error ("Unknown terminal device");
6494 if (t
->type
== output_initial
)
6496 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
6497 error ("Device %d is not a termcap terminal device", t
->id
);
6500 struct tty_display_info
*tty
= t
->display_info
.tty
;
6503 error ("Terminal is currently suspended");
6505 if (tty
->termscript
)
6507 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6508 fflush (tty
->termscript
);
6512 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
6519 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6520 doc
: /* Beep, or flash the screen.
6521 Also, unless an argument is given,
6522 terminate any keyboard macro currently executing. */)
6531 ring_bell (XFRAME (selected_frame
));
6544 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6545 error ("Keyboard macro terminated by a command ringing the bell");
6547 ring_bell (XFRAME (selected_frame
));
6552 /***********************************************************************
6554 ***********************************************************************/
6556 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6557 doc
: /* Pause, without updating display, for SECONDS seconds.
6558 SECONDS may be a floating-point value, meaning that you can wait for a
6559 fraction of a second. Optional second arg MILLISECONDS specifies an
6560 additional wait period, in milliseconds; this may be useful if your
6561 Emacs was built without floating point support.
6562 \(Not all operating systems support waiting for a fraction of a second.) */)
6563 (seconds
, milliseconds
)
6564 Lisp_Object seconds
, milliseconds
;
6568 if (NILP (milliseconds
))
6569 XSETINT (milliseconds
, 0);
6571 CHECK_NUMBER (milliseconds
);
6572 usec
= XINT (milliseconds
) * 1000;
6575 double duration
= extract_float (seconds
);
6576 sec
= (int) duration
;
6577 usec
+= (duration
- sec
) * 1000000;
6580 #ifndef EMACS_HAS_USECS
6581 if (sec
== 0 && usec
!= 0)
6582 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6585 /* Assure that 0 <= usec < 1000000. */
6588 /* We can't rely on the rounding being correct if usec is negative. */
6589 if (-1000000 < usec
)
6590 sec
--, usec
+= 1000000;
6592 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6595 sec
+= usec
/ 1000000, usec
%= 1000000;
6597 if (sec
< 0 || (sec
== 0 && usec
== 0))
6600 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6606 /* This is just like wait_reading_process_output, except that
6609 TIMEOUT is number of seconds to wait (float or integer),
6610 or t to wait forever.
6611 READING is 1 if reading input.
6612 If DO_DISPLAY is >0 display process output while waiting.
6613 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6617 sit_for (timeout
, reading
, do_display
)
6618 Lisp_Object timeout
;
6619 int reading
, do_display
;
6623 swallow_events (do_display
);
6625 if ((detect_input_pending_run_timers (do_display
))
6626 || !NILP (Vexecuting_kbd_macro
))
6629 if (do_display
>= 2)
6630 redisplay_preserve_echo_area (2);
6632 if (INTEGERP (timeout
))
6634 sec
= XINT (timeout
);
6637 else if (FLOATP (timeout
))
6639 double seconds
= XFLOAT_DATA (timeout
);
6640 sec
= (int) seconds
;
6641 usec
= (int) ((seconds
- sec
) * 1000000);
6643 else if (EQ (timeout
, Qt
))
6649 wrong_type_argument (Qnumberp
, timeout
);
6651 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6658 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6661 return detect_input_pending () ? Qnil
: Qt
;
6665 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6666 doc
: /* Perform redisplay if no input is available.
6667 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6668 perform a full redisplay even if input is available.
6669 Return t if redisplay was performed, nil otherwise. */)
6676 if ((detect_input_pending_run_timers (1)
6677 && NILP (force
) && !redisplay_dont_pause
)
6678 || !NILP (Vexecuting_kbd_macro
))
6681 count
= SPECPDL_INDEX ();
6682 if (!NILP (force
) && !redisplay_dont_pause
)
6683 specbind (Qredisplay_dont_pause
, Qt
);
6684 redisplay_preserve_echo_area (2);
6685 unbind_to (count
, Qnil
);
6691 /***********************************************************************
6692 Other Lisp Functions
6693 ***********************************************************************/
6695 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6696 session's frames, frame names, buffers, buffer-read-only flags, and
6697 buffer-modified-flags. */
6699 static Lisp_Object frame_and_buffer_state
;
6702 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6703 Sframe_or_buffer_changed_p
, 0, 1, 0,
6704 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6705 VARIABLE is a variable name whose value is either nil or a state vector
6706 that will be updated to contain all frames and buffers,
6707 aside from buffers whose names start with space,
6708 along with the buffers' read-only and modified flags. This allows a fast
6709 check to see whether buffer menus might need to be recomputed.
6710 If this function returns non-nil, it updates the internal vector to reflect
6713 If VARIABLE is nil, an internal variable is used. Users should not
6714 pass nil for VARIABLE. */)
6716 Lisp_Object variable
;
6718 Lisp_Object state
, tail
, frame
, buf
;
6719 Lisp_Object
*vecp
, *end
;
6722 if (! NILP (variable
))
6724 CHECK_SYMBOL (variable
);
6725 state
= Fsymbol_value (variable
);
6726 if (! VECTORP (state
))
6730 state
= frame_and_buffer_state
;
6732 vecp
= XVECTOR (state
)->contents
;
6733 end
= vecp
+ XVECTOR (state
)->size
;
6735 FOR_EACH_FRAME (tail
, frame
)
6739 if (!EQ (*vecp
++, frame
))
6743 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6746 /* Check that the buffer info matches. */
6747 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6749 buf
= XCDR (XCAR (tail
));
6750 /* Ignore buffers that aren't included in buffer lists. */
6751 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6755 if (!EQ (*vecp
++, buf
))
6759 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6763 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6768 /* Detect deletion of a buffer at the end of the list. */
6769 if (EQ (*vecp
, Qlambda
))
6772 /* Come here if we decide the data has changed. */
6774 /* Count the size we will need.
6775 Start with 1 so there is room for at least one lambda at the end. */
6777 FOR_EACH_FRAME (tail
, frame
)
6779 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6781 /* Reallocate the vector if data has grown to need it,
6782 or if it has shrunk a lot. */
6783 if (! VECTORP (state
)
6784 || n
> XVECTOR (state
)->size
6785 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6786 /* Add 20 extra so we grow it less often. */
6788 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6789 if (! NILP (variable
))
6790 Fset (variable
, state
);
6792 frame_and_buffer_state
= state
;
6795 /* Record the new data in the (possibly reallocated) vector. */
6796 vecp
= XVECTOR (state
)->contents
;
6797 FOR_EACH_FRAME (tail
, frame
)
6800 *vecp
++ = XFRAME (frame
)->name
;
6802 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6804 buf
= XCDR (XCAR (tail
));
6805 /* Ignore buffers that aren't included in buffer lists. */
6806 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6809 *vecp
++ = XBUFFER (buf
)->read_only
;
6810 *vecp
++ = Fbuffer_modified_p (buf
);
6812 /* Fill up the vector with lambdas (always at least one). */
6814 while (vecp
- XVECTOR (state
)->contents
6815 < XVECTOR (state
)->size
)
6817 /* Make sure we didn't overflow the vector. */
6818 if (vecp
- XVECTOR (state
)->contents
6819 > XVECTOR (state
)->size
)
6826 /***********************************************************************
6828 ***********************************************************************/
6830 /* Initialization done when Emacs fork is started, before doing stty.
6831 Determine terminal type and set terminal_driver. Then invoke its
6832 decoding routine to set up variables in the terminal package. */
6837 char *terminal_type
;
6839 #ifdef HAVE_X_WINDOWS
6840 extern int display_arg
;
6843 /* Construct the space glyph. */
6844 space_glyph
.type
= CHAR_GLYPH
;
6845 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6846 space_glyph
.charpos
= -1;
6849 cursor_in_echo_area
= 0;
6850 terminal_type
= (char *) 0;
6852 /* Now is the time to initialize this; it's used by init_sys_modes
6854 Vinitial_window_system
= Qnil
;
6856 /* SIGWINCH needs to be handled no matter what display we start
6857 with. Otherwise newly opened tty frames will not resize
6862 #endif /* CANNOT_DUMP */
6863 signal (SIGWINCH
, window_change_signal
);
6864 #endif /* SIGWINCH */
6866 /* If running as a daemon, no need to initialize any frames/terminal. */
6870 /* If the user wants to use a window system, we shouldn't bother
6871 initializing the terminal. This is especially important when the
6872 terminal is so dumb that emacs gives up before and doesn't bother
6873 using the window system.
6875 If the DISPLAY environment variable is set and nonempty,
6876 try to use X, and die with an error message if that doesn't work. */
6878 #ifdef HAVE_X_WINDOWS
6879 if (! inhibit_window_system
&& ! display_arg
)
6882 display
= getenv ("DISPLAY");
6883 display_arg
= (display
!= 0 && *display
!= 0);
6885 if (display_arg
&& !x_display_ok (display
))
6887 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6889 inhibit_window_system
= 1;
6893 if (!inhibit_window_system
&& display_arg
6899 Vinitial_window_system
= Qx
;
6901 Vwindow_system_version
= make_number (11);
6903 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6904 /* In some versions of ncurses,
6905 tputs crashes if we have not called tgetent.
6907 { char b
[2044]; tgetent (b
, "xterm");}
6909 adjust_frame_glyphs_initially ();
6912 #endif /* HAVE_X_WINDOWS */
6915 if (!inhibit_window_system
)
6917 Vinitial_window_system
= Qw32
;
6918 Vwindow_system_version
= make_number (1);
6919 adjust_frame_glyphs_initially ();
6922 #endif /* HAVE_NTGUI */
6925 if (!inhibit_window_system
6931 Vinitial_window_system
= Qns
;
6932 Vwindow_system_version
= make_number(10);
6933 adjust_frame_glyphs_initially ();
6938 /* If no window system has been specified, try to use the terminal. */
6941 fatal ("standard input is not a tty");
6946 terminal_type
= "w32console";
6948 /* Look at the TERM variable. */
6949 terminal_type
= (char *) getenv ("TERM");
6953 #ifdef HAVE_WINDOW_SYSTEM
6954 if (! inhibit_window_system
)
6955 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6957 #endif /* HAVE_WINDOW_SYSTEM */
6958 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6964 struct frame
*f
= XFRAME (selected_frame
);
6966 /* Open a display on the controlling tty. */
6967 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6969 /* Convert the initial frame to use the new display. */
6970 if (f
->output_method
!= output_initial
)
6972 f
->output_method
= t
->type
;
6975 t
->reference_count
++;
6976 t
->display_info
.tty
->top_frame
= selected_frame
;
6977 change_frame_size (XFRAME (selected_frame
),
6978 FrameRows (t
->display_info
.tty
),
6979 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6981 /* Delete the initial terminal. */
6982 if (--initial_terminal
->reference_count
== 0
6983 && initial_terminal
->delete_terminal_hook
)
6984 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6986 /* Update frame parameters to reflect the new type. */
6987 Fmodify_frame_parameters
6988 (selected_frame
, Fcons (Fcons (Qtty_type
,
6989 Ftty_type (selected_frame
)), Qnil
));
6990 if (t
->display_info
.tty
->name
)
6991 Fmodify_frame_parameters (selected_frame
,
6992 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6995 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
7000 struct frame
*sf
= SELECTED_FRAME ();
7001 int width
= FRAME_TOTAL_COLS (sf
);
7002 int height
= FRAME_LINES (sf
);
7004 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
7006 /* If these sizes are so big they cause overflow, just ignore the
7007 change. It's not clear what better we could do. */
7008 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
7009 fatal ("screen size %dx%d too big", width
, height
);
7012 adjust_frame_glyphs_initially ();
7013 calculate_costs (XFRAME (selected_frame
));
7015 /* Set up faces of the initial terminal frame of a dumped Emacs. */
7018 && NILP (Vinitial_window_system
))
7020 /* For the initial frame, we don't have any way of knowing what
7021 are the foreground and background colors of the terminal. */
7022 struct frame
*sf
= SELECTED_FRAME();
7024 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
7025 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
7026 call0 (intern ("tty-set-up-initial-frame-faces"));
7032 /***********************************************************************
7034 ***********************************************************************/
7036 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
7037 Sinternal_show_cursor
, 2, 2, 0,
7038 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
7039 WINDOW nil means use the selected window. SHOW non-nil means
7040 show a cursor in WINDOW in the next redisplay. SHOW nil means
7041 don't show a cursor. */)
7043 Lisp_Object window
, show
;
7045 /* Don't change cursor state while redisplaying. This could confuse
7047 if (!redisplaying_p
)
7050 window
= selected_window
;
7052 CHECK_WINDOW (window
);
7054 XWINDOW (window
)->cursor_off_p
= NILP (show
);
7061 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
7062 Sinternal_show_cursor_p
, 0, 1, 0,
7063 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
7064 WINDOW nil or omitted means report on the selected window. */)
7071 window
= selected_window
;
7073 CHECK_WINDOW (window
);
7075 w
= XWINDOW (window
);
7076 return w
->cursor_off_p
? Qnil
: Qt
;
7079 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
7080 Slast_nonminibuf_frame
, 0, 0, 0,
7081 doc
: /* Value is last nonminibuffer frame. */)
7084 Lisp_Object frame
= Qnil
;
7086 if (last_nonminibuf_frame
)
7087 XSETFRAME (frame
, last_nonminibuf_frame
);
7092 /***********************************************************************
7094 ***********************************************************************/
7099 defsubr (&Sredraw_frame
);
7100 defsubr (&Sredraw_display
);
7101 defsubr (&Sframe_or_buffer_changed_p
);
7102 defsubr (&Sopen_termscript
);
7104 defsubr (&Sredisplay
);
7105 defsubr (&Ssleep_for
);
7106 defsubr (&Ssend_string_to_terminal
);
7107 defsubr (&Sinternal_show_cursor
);
7108 defsubr (&Sinternal_show_cursor_p
);
7109 defsubr (&Slast_nonminibuf_frame
);
7112 defsubr (&Sdump_redisplay_history
);
7115 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
7116 staticpro (&frame_and_buffer_state
);
7118 Qdisplay_table
= intern_c_string ("display-table");
7119 staticpro (&Qdisplay_table
);
7120 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
7121 staticpro (&Qredisplay_dont_pause
);
7123 DEFVAR_INT ("baud-rate", &baud_rate
,
7124 doc
: /* *The output baud rate of the terminal.
7125 On most systems, changing this value will affect the amount of padding
7126 and the other strategic decisions made during redisplay. */);
7128 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7129 doc
: /* *Non-nil means invert the entire frame display.
7130 This means everything is in inverse video which otherwise would not be. */);
7132 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7133 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7135 See also `ring-bell-function'. */);
7137 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7138 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7139 A non-nil value is useful if the terminal can automatically preserve
7140 Emacs's frame display when you reenter Emacs.
7141 It is up to you to set this variable if your terminal can do that. */);
7143 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
7144 doc
: /* Name of the window system that Emacs uses for the first frame.
7145 The value is a symbol--for instance, `x' for X windows.
7146 The value is nil if Emacs is using a text-only terminal. */);
7148 DEFVAR_KBOARD ("window-system", Vwindow_system
,
7149 doc
: /* Name of window system through which the selected frame is displayed.
7150 The value is a symbol--for instance, `x' for X windows.
7151 The value is nil if the selected frame is on a text-only-terminal. */);
7153 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7154 doc
: /* The version number of the window system in use.
7155 For X windows, this is 11. */);
7157 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7158 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7160 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7161 doc
: /* Table defining how to output a glyph code to the frame.
7162 If not nil, this is a vector indexed by glyph code to define the glyph.
7163 Each element can be:
7164 integer: a glyph code which this glyph is an alias for.
7165 string: output this glyph using that string (not impl. in X windows).
7166 nil: this glyph mod 524288 is the code of a character to output,
7167 and this glyph / 524288 is the face number (see `face-id') to use
7168 while outputting it. */);
7169 Vglyph_table
= Qnil
;
7171 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7172 doc
: /* Display table to use for buffers that specify none.
7173 See `buffer-display-table' for more information. */);
7174 Vstandard_display_table
= Qnil
;
7176 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7177 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7178 redisplay_dont_pause
= 0;
7180 #if PERIODIC_PREEMPTION_CHECKING
7181 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7182 doc
: /* *The period in seconds between checking for input during redisplay.
7183 If input is detected, redisplay is pre-empted, and the input is processed.
7184 If nil, never pre-empt redisplay. */);
7185 Vredisplay_preemption_period
= make_float (0.10);
7192 Vinitial_window_system
= Qnil
;
7193 Vwindow_system_version
= Qnil
;
7197 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7198 (do not change this comment) */