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 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 2, or (at your option)
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; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
42 #include "termhooks.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
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 /* Nonzero upon entry to redisplay means do not assume anything about
196 current contents of actual terminal frame; clear and redraw it. */
200 /* Nonzero means last display completed. Zero means it was preempted. */
202 int display_completed
;
204 /* Lisp variable visible-bell; enables use of screen-flash instead of
209 /* Invert the color of the whole frame, at a low level. */
213 /* Line speed of the terminal. */
217 /* Either nil or a symbol naming the window system under which Emacs
218 creates the first frame. */
220 Lisp_Object Vinitial_window_system
;
222 /* Version number of X windows: 10, 11 or nil. */
224 Lisp_Object Vwindow_system_version
;
226 /* Vector of glyph definitions. Indexed by glyph number, the contents
227 are a string which is how to output the glyph.
229 If Vglyph_table is nil, a glyph is output by using its low 8 bits
232 This is an obsolete feature that is no longer used. The variable
233 is retained for compatibility. */
235 Lisp_Object Vglyph_table
;
237 /* Display table to use for vectors that don't specify their own. */
239 Lisp_Object Vstandard_display_table
;
241 /* Nonzero means reading single-character input with prompt so put
242 cursor on mini-buffer after the prompt. Positive means at end of
243 text in echo area; negative means at beginning of line. */
245 int cursor_in_echo_area
;
247 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
250 /* The currently selected frame. In a single-frame version, this
251 variable always equals the_only_frame. */
253 Lisp_Object selected_frame
;
255 /* A frame which is not just a mini-buffer, or 0 if there are no such
256 frames. This is usually the most recent such frame that was
257 selected. In a single-frame version, this variable always holds
258 the address of the_only_frame. */
260 struct frame
*last_nonminibuf_frame
;
262 /* 1 means SIGWINCH happened when not safe. */
264 int delayed_size_change
;
266 /* 1 means glyph initialization has been completed at startup. */
268 static int glyphs_initialized_initially_p
;
270 /* Updated window if != 0. Set by update_window. */
272 struct window
*updated_window
;
274 /* Glyph row updated in update_window_line, and area that is updated. */
276 struct glyph_row
*updated_row
;
279 /* A glyph for a space. */
281 struct glyph space_glyph
;
283 /* Non-zero means update has been performed directly, so that there's
284 no need for redisplay_internal to do much work. Set by
285 direct_output_for_insert. */
287 int redisplay_performed_directly_p
;
289 /* Counts of allocated structures. These counts serve to diagnose
290 memory leaks and double frees. */
292 int glyph_matrix_count
;
293 int glyph_pool_count
;
295 /* If non-null, the frame whose frame matrices are manipulated. If
296 null, window matrices are worked on. */
298 static struct frame
*frame_matrix_frame
;
300 /* Non-zero means that fonts have been loaded since the last glyph
301 matrix adjustments. Redisplay must stop, and glyph matrices must
302 be adjusted when this flag becomes non-zero during display. The
303 reason fonts can be loaded so late is that fonts of fontsets are
308 /* Convert vpos and hpos from frame to window and vice versa.
309 This may only be used for terminal frames. */
313 static int window_to_frame_vpos
P_ ((struct window
*, int));
314 static int window_to_frame_hpos
P_ ((struct window
*, int));
315 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
316 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
318 /* One element of the ring buffer containing redisplay history
321 struct redisplay_history
323 char trace
[512 + 100];
326 /* The size of the history buffer. */
328 #define REDISPLAY_HISTORY_SIZE 30
330 /* The redisplay history buffer. */
332 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
334 /* Next free entry in redisplay_history. */
336 static int history_idx
;
338 /* A tick that's incremented each time something is added to the
341 static unsigned history_tick
;
343 static void add_frame_display_history
P_ ((struct frame
*, int));
344 static void add_window_display_history
P_ ((struct window
*, char *, int));
347 /* Add to the redisplay history how window W has been displayed.
348 MSG is a trace containing the information how W's glyph matrix
349 has been constructed. PAUSED_P non-zero means that the update
350 has been interrupted for pending input. */
353 add_window_display_history (w
, msg
, paused_p
)
360 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
362 buf
= redisplay_history
[history_idx
].trace
;
365 sprintf (buf
, "%d: window %p (`%s')%s\n",
368 ((BUFFERP (w
->buffer
)
369 && STRINGP (XBUFFER (w
->buffer
)->name
))
370 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
372 paused_p
? " ***paused***" : "");
377 /* Add to the redisplay history that frame F has been displayed.
378 PAUSED_P non-zero means that the update has been interrupted for
382 add_frame_display_history (f
, paused_p
)
388 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
390 buf
= redisplay_history
[history_idx
].trace
;
393 sprintf (buf
, "%d: update frame %p%s",
395 f
, paused_p
? " ***paused***" : "");
399 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
400 Sdump_redisplay_history
, 0, 0, "",
401 doc
: /* Dump redisplay history to stderr. */)
406 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
409 i
= REDISPLAY_HISTORY_SIZE
- 1;
410 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
417 #else /* GLYPH_DEBUG == 0 */
419 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
420 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
422 #endif /* GLYPH_DEBUG == 0 */
425 /* Like bcopy except never gets confused by overlap. Let this be the
426 first function defined in this file, or change emacs.c where the
427 address of this function is used. */
430 safe_bcopy (from
, to
, size
)
435 if (size
<= 0 || from
== to
)
438 /* If the source and destination don't overlap, then bcopy can
439 handle it. If they do overlap, but the destination is lower in
440 memory than the source, we'll assume bcopy can handle that. */
441 if (to
< from
|| from
+ size
<= to
)
442 bcopy (from
, to
, size
);
444 /* Otherwise, we'll copy from the end. */
447 register const char *endf
= from
+ size
;
448 register char *endt
= to
+ size
;
450 /* If TO - FROM is large, then we should break the copy into
451 nonoverlapping chunks of TO - FROM bytes each. However, if
452 TO - FROM is small, then the bcopy function call overhead
453 makes this not worth it. The crossover point could be about
454 anywhere. Since I don't think the obvious copy loop is too
455 bad, I'm trying to err in its favor. */
460 while (endf
!= from
);
472 bcopy (endf
, endt
, to
- from
);
475 /* If SIZE wasn't a multiple of TO - FROM, there will be a
476 little left over. The amount left over is (endt + (to -
477 from)) - to, which is endt - from. */
478 bcopy (from
, to
, endt
- from
);
485 /***********************************************************************
487 ***********************************************************************/
489 /* Allocate and return a glyph_matrix structure. POOL is the glyph
490 pool from which memory for the matrix should be allocated, or null
491 for window-based redisplay where no glyph pools are used. The
492 member `pool' of the glyph matrix structure returned is set to
493 POOL, the structure is otherwise zeroed. */
495 struct glyph_matrix
*
496 new_glyph_matrix (pool
)
497 struct glyph_pool
*pool
;
499 struct glyph_matrix
*result
;
501 /* Allocate and clear. */
502 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
503 bzero (result
, sizeof *result
);
505 /* Increment number of allocated matrices. This count is used
506 to detect memory leaks. */
507 ++glyph_matrix_count
;
509 /* Set pool and return. */
515 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
517 The global counter glyph_matrix_count is decremented when a matrix
518 is freed. If the count gets negative, more structures were freed
519 than allocated, i.e. one matrix was freed more than once or a bogus
520 pointer was passed to this function.
522 If MATRIX->pool is null, this means that the matrix manages its own
523 glyph memory---this is done for matrices on X frames. Freeing the
524 matrix also frees the glyph memory in this case. */
527 free_glyph_matrix (matrix
)
528 struct glyph_matrix
*matrix
;
534 /* Detect the case that more matrices are freed than were
536 if (--glyph_matrix_count
< 0)
539 /* Free glyph memory if MATRIX owns it. */
540 if (matrix
->pool
== NULL
)
541 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
542 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
544 /* Free row structures and the matrix itself. */
545 xfree (matrix
->rows
);
551 /* Return the number of glyphs to reserve for a marginal area of
552 window W. TOTAL_GLYPHS is the number of glyphs in a complete
553 display line of window W. MARGIN gives the width of the marginal
554 area in canonical character units. MARGIN should be an integer
558 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
565 if (NUMBERP (margin
))
567 int width
= XFASTINT (w
->total_cols
);
568 double d
= max (0, XFLOATINT (margin
));
569 d
= min (width
/ 2 - 1, d
);
570 n
= (int) ((double) total_glyphs
/ width
* d
);
579 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
582 W is null if the function is called for a frame glyph matrix.
583 Otherwise it is the window MATRIX is a member of. X and Y are the
584 indices of the first column and row of MATRIX within the frame
585 matrix, if such a matrix exists. They are zero for purely
586 window-based redisplay. DIM is the needed size of the matrix.
588 In window-based redisplay, where no frame matrices exist, glyph
589 matrices manage their own glyph storage. Otherwise, they allocate
590 storage from a common frame glyph pool which can be found in
593 The reason for this memory management strategy is to avoid complete
594 frame redraws if possible. When we allocate from a common pool, a
595 change of the location or size of a sub-matrix within the pool
596 requires a complete redisplay of the frame because we cannot easily
597 make sure that the current matrices of all windows still agree with
598 what is displayed on the screen. While this is usually fast, it
599 leads to screen flickering. */
602 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
604 struct glyph_matrix
*matrix
;
610 int marginal_areas_changed_p
= 0;
611 int header_line_changed_p
= 0;
612 int header_line_p
= 0;
613 int left
= -1, right
= -1;
614 int window_width
= -1, window_height
;
616 /* See if W had a header line that has disappeared now, or vice versa.
620 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
622 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
623 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
625 matrix
->header_line_p
= header_line_p
;
627 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
628 Do nothing if MATRIX' size, position, vscroll, and marginal areas
629 haven't changed. This optimization is important because preserving
630 the matrix means preventing redisplay. */
631 if (matrix
->pool
== NULL
)
633 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
634 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
635 xassert (left
>= 0 && right
>= 0);
636 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
637 || right
!= matrix
->right_margin_glyphs
);
639 if (!marginal_areas_changed_p
641 && !header_line_changed_p
642 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
643 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
644 && matrix
->window_height
== window_height
645 && matrix
->window_vscroll
== w
->vscroll
646 && matrix
->window_width
== window_width
)
650 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
651 if (matrix
->rows_allocated
< dim
.height
)
653 int size
= dim
.height
* sizeof (struct glyph_row
);
654 new_rows
= dim
.height
- matrix
->rows_allocated
;
655 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
656 bzero (matrix
->rows
+ matrix
->rows_allocated
,
657 new_rows
* sizeof *matrix
->rows
);
658 matrix
->rows_allocated
= dim
.height
;
663 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
664 on a frame not using window-based redisplay. Set up pointers for
665 each row into the glyph pool. */
668 xassert (matrix
->pool
->glyphs
);
672 left
= margin_glyphs_to_reserve (w
, dim
.width
,
673 w
->left_margin_cols
);
674 right
= margin_glyphs_to_reserve (w
, dim
.width
,
675 w
->right_margin_cols
);
680 for (i
= 0; i
< dim
.height
; ++i
)
682 struct glyph_row
*row
= &matrix
->rows
[i
];
684 row
->glyphs
[LEFT_MARGIN_AREA
]
685 = (matrix
->pool
->glyphs
686 + (y
+ i
) * matrix
->pool
->ncolumns
690 || row
== matrix
->rows
+ dim
.height
- 1
691 || (row
== matrix
->rows
&& matrix
->header_line_p
))
693 row
->glyphs
[TEXT_AREA
]
694 = row
->glyphs
[LEFT_MARGIN_AREA
];
695 row
->glyphs
[RIGHT_MARGIN_AREA
]
696 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
697 row
->glyphs
[LAST_AREA
]
698 = row
->glyphs
[RIGHT_MARGIN_AREA
];
702 row
->glyphs
[TEXT_AREA
]
703 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
704 row
->glyphs
[RIGHT_MARGIN_AREA
]
705 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
706 row
->glyphs
[LAST_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
711 matrix
->left_margin_glyphs
= left
;
712 matrix
->right_margin_glyphs
= right
;
716 /* If MATRIX->pool is null, MATRIX is responsible for managing
717 its own memory. It is a window matrix for window-based redisplay.
718 Allocate glyph memory from the heap. */
719 if (dim
.width
> matrix
->matrix_w
721 || header_line_changed_p
722 || marginal_areas_changed_p
)
724 struct glyph_row
*row
= matrix
->rows
;
725 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
729 row
->glyphs
[LEFT_MARGIN_AREA
]
730 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
732 * sizeof (struct glyph
)));
734 /* The mode line never has marginal areas. */
735 if (row
== matrix
->rows
+ dim
.height
- 1
736 || (row
== matrix
->rows
&& matrix
->header_line_p
))
738 row
->glyphs
[TEXT_AREA
]
739 = row
->glyphs
[LEFT_MARGIN_AREA
];
740 row
->glyphs
[RIGHT_MARGIN_AREA
]
741 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
742 row
->glyphs
[LAST_AREA
]
743 = row
->glyphs
[RIGHT_MARGIN_AREA
];
747 row
->glyphs
[TEXT_AREA
]
748 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
749 row
->glyphs
[RIGHT_MARGIN_AREA
]
750 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
751 row
->glyphs
[LAST_AREA
]
752 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
758 xassert (left
>= 0 && right
>= 0);
759 matrix
->left_margin_glyphs
= left
;
760 matrix
->right_margin_glyphs
= right
;
763 /* Number of rows to be used by MATRIX. */
764 matrix
->nrows
= dim
.height
;
765 xassert (matrix
->nrows
>= 0);
769 if (matrix
== w
->current_matrix
)
771 /* Mark rows in a current matrix of a window as not having
772 valid contents. It's important to not do this for
773 desired matrices. When Emacs starts, it may already be
774 building desired matrices when this function runs. */
775 if (window_width
< 0)
776 window_width
= window_box_width (w
, -1);
778 /* Optimize the case that only the height has changed (C-x 2,
779 upper window). Invalidate all rows that are no longer part
781 if (!marginal_areas_changed_p
782 && !header_line_changed_p
784 && dim
.width
== matrix
->matrix_w
785 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
786 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
787 && matrix
->window_width
== window_width
)
789 /* Find the last row in the window. */
790 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
791 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
797 /* Window end is invalid, if inside of the rows that
798 are invalidated below. */
799 if (INTEGERP (w
->window_end_vpos
)
800 && XFASTINT (w
->window_end_vpos
) >= i
)
801 w
->window_end_valid
= Qnil
;
803 while (i
< matrix
->nrows
)
804 matrix
->rows
[i
++].enabled_p
= 0;
808 for (i
= 0; i
< matrix
->nrows
; ++i
)
809 matrix
->rows
[i
].enabled_p
= 0;
812 else if (matrix
== w
->desired_matrix
)
814 /* Rows in desired matrices always have to be cleared;
815 redisplay expects this is the case when it runs, so it
816 had better be the case when we adjust matrices between
818 for (i
= 0; i
< matrix
->nrows
; ++i
)
819 matrix
->rows
[i
].enabled_p
= 0;
824 /* Remember last values to be able to optimize frame redraws. */
825 matrix
->matrix_x
= x
;
826 matrix
->matrix_y
= y
;
827 matrix
->matrix_w
= dim
.width
;
828 matrix
->matrix_h
= dim
.height
;
830 /* Record the top y location and height of W at the time the matrix
831 was last adjusted. This is used to optimize redisplay above. */
834 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
835 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
836 matrix
->window_height
= window_height
;
837 matrix
->window_width
= window_width
;
838 matrix
->window_vscroll
= w
->vscroll
;
843 /* Reverse the contents of rows in MATRIX between START and END. The
844 contents of the row at END - 1 end up at START, END - 2 at START +
845 1 etc. This is part of the implementation of rotate_matrix (see
849 reverse_rows (matrix
, start
, end
)
850 struct glyph_matrix
*matrix
;
855 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
857 /* Non-ISO HP/UX compiler doesn't like auto struct
859 struct glyph_row temp
;
860 temp
= matrix
->rows
[i
];
861 matrix
->rows
[i
] = matrix
->rows
[j
];
862 matrix
->rows
[j
] = temp
;
867 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
868 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
869 indices. (Note: this does not copy glyphs, only glyph pointers in
870 row structures are moved around).
872 The algorithm used for rotating the vector was, I believe, first
873 described by Kernighan. See the vector R as consisting of two
874 sub-vectors AB, where A has length BY for BY >= 0. The result
875 after rotating is then BA. Reverse both sub-vectors to get ArBr
876 and reverse the result to get (ArBr)r which is BA. Similar for
880 rotate_matrix (matrix
, first
, last
, by
)
881 struct glyph_matrix
*matrix
;
886 /* Up (rotate left, i.e. towards lower indices). */
888 reverse_rows (matrix
, first
, first
+ by
);
889 reverse_rows (matrix
, first
+ by
, last
);
890 reverse_rows (matrix
, first
, last
);
894 /* Down (rotate right, i.e. towards higher indices). */
895 reverse_rows (matrix
, last
- by
, last
);
896 reverse_rows (matrix
, first
, last
- by
);
897 reverse_rows (matrix
, first
, last
);
902 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
903 with indices START <= index < END. Increment positions by DELTA/
907 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
908 struct glyph_matrix
*matrix
;
909 int start
, end
, delta
, delta_bytes
;
911 /* Check that START and END are reasonable values. */
912 xassert (start
>= 0 && start
<= matrix
->nrows
);
913 xassert (end
>= 0 && end
<= matrix
->nrows
);
914 xassert (start
<= end
);
916 for (; start
< end
; ++start
)
917 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
921 /* Enable a range of rows in glyph matrix MATRIX. START and END are
922 the row indices of the first and last + 1 row to enable. If
923 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
926 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
927 struct glyph_matrix
*matrix
;
931 xassert (start
<= end
);
932 xassert (start
>= 0 && start
< matrix
->nrows
);
933 xassert (end
>= 0 && end
<= matrix
->nrows
);
935 for (; start
< end
; ++start
)
936 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
942 This empties all rows in MATRIX by setting the enabled_p flag for
943 all rows of the matrix to zero. The function prepare_desired_row
944 will eventually really clear a row when it sees one with a zero
947 Resets update hints to defaults value. The only update hint
948 currently present is the flag MATRIX->no_scrolling_p. */
951 clear_glyph_matrix (matrix
)
952 struct glyph_matrix
*matrix
;
956 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
957 matrix
->no_scrolling_p
= 0;
962 /* Shift part of the glyph matrix MATRIX of window W up or down.
963 Increment y-positions in glyph rows between START and END by DY,
964 and recompute their visible height. */
967 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
969 struct glyph_matrix
*matrix
;
974 xassert (start
<= end
);
975 xassert (start
>= 0 && start
< matrix
->nrows
);
976 xassert (end
>= 0 && end
<= matrix
->nrows
);
978 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
979 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
981 for (; start
< end
; ++start
)
983 struct glyph_row
*row
= &matrix
->rows
[start
];
986 row
->visible_height
= row
->height
;
989 row
->visible_height
-= min_y
- row
->y
;
990 if (row
->y
+ row
->height
> max_y
)
991 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
996 /* Mark all rows in current matrices of frame F as invalid. Marking
997 invalid is done by setting enabled_p to zero for all rows in a
1001 clear_current_matrices (f
)
1002 register struct frame
*f
;
1004 /* Clear frame current matrix, if we have one. */
1005 if (f
->current_matrix
)
1006 clear_glyph_matrix (f
->current_matrix
);
1008 /* Clear the matrix of the menu bar window, if such a window exists.
1009 The menu bar window is currently used to display menus on X when
1010 no toolkit support is compiled in. */
1011 if (WINDOWP (f
->menu_bar_window
))
1012 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1014 /* Clear the matrix of the tool-bar window, if any. */
1015 if (WINDOWP (f
->tool_bar_window
))
1016 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1018 /* Clear current window matrices. */
1019 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1020 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1024 /* Clear out all display lines of F for a coming redisplay. */
1027 clear_desired_matrices (f
)
1028 register struct frame
*f
;
1030 if (f
->desired_matrix
)
1031 clear_glyph_matrix (f
->desired_matrix
);
1033 if (WINDOWP (f
->menu_bar_window
))
1034 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1036 if (WINDOWP (f
->tool_bar_window
))
1037 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1039 /* Do it for window matrices. */
1040 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1041 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1045 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1046 non-zero clear desired matrices, otherwise clear current matrices. */
1049 clear_window_matrices (w
, desired_p
)
1055 if (!NILP (w
->hchild
))
1057 xassert (WINDOWP (w
->hchild
));
1058 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1060 else if (!NILP (w
->vchild
))
1062 xassert (WINDOWP (w
->vchild
));
1063 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1068 clear_glyph_matrix (w
->desired_matrix
);
1071 clear_glyph_matrix (w
->current_matrix
);
1072 w
->window_end_valid
= Qnil
;
1076 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1082 /***********************************************************************
1085 See dispextern.h for an overall explanation of glyph rows.
1086 ***********************************************************************/
1088 /* Clear glyph row ROW. Do it in a way that makes it robust against
1089 changes in the glyph_row structure, i.e. addition or removal of
1090 structure members. */
1092 static struct glyph_row null_row
;
1095 clear_glyph_row (row
)
1096 struct glyph_row
*row
;
1098 struct glyph
*p
[1 + LAST_AREA
];
1100 /* Save pointers. */
1101 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1102 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1103 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1104 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1109 /* Restore pointers. */
1110 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1111 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1112 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1113 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1115 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1116 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1117 Redisplay outputs such glyphs, and flickering effects were
1118 the result. This also depended on the contents of memory
1119 returned by xmalloc. If flickering happens again, activate
1120 the code below. If the flickering is gone with that, chances
1121 are that the flickering has the same reason as here. */
1122 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1127 /* Make ROW an empty, enabled row of canonical character height,
1128 in window W starting at y-position Y. */
1131 blank_row (w
, row
, y
)
1133 struct glyph_row
*row
;
1138 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1139 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1141 clear_glyph_row (row
);
1143 row
->ascent
= row
->phys_ascent
= 0;
1144 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1145 row
->visible_height
= row
->height
;
1148 row
->visible_height
-= min_y
- row
->y
;
1149 if (row
->y
+ row
->height
> max_y
)
1150 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1156 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1157 are the amounts by which to change positions. Note that the first
1158 glyph of the text area of a row can have a buffer position even if
1159 the used count of the text area is zero. Such rows display line
1163 increment_row_positions (row
, delta
, delta_bytes
)
1164 struct glyph_row
*row
;
1165 int delta
, delta_bytes
;
1169 /* Increment start and end positions. */
1170 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1171 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1172 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1173 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1175 if (!row
->enabled_p
)
1178 /* Increment positions in glyphs. */
1179 for (area
= 0; area
< LAST_AREA
; ++area
)
1180 for (i
= 0; i
< row
->used
[area
]; ++i
)
1181 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1182 && row
->glyphs
[area
][i
].charpos
> 0)
1183 row
->glyphs
[area
][i
].charpos
+= delta
;
1185 /* Capture the case of rows displaying a line end. */
1186 if (row
->used
[TEXT_AREA
] == 0
1187 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1188 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1193 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1194 contents, i.e. glyph structure contents are exchanged between A and
1195 B without changing glyph pointers in A and B. */
1198 swap_glyphs_in_rows (a
, b
)
1199 struct glyph_row
*a
, *b
;
1203 for (area
= 0; area
< LAST_AREA
; ++area
)
1205 /* Number of glyphs to swap. */
1206 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1208 /* Start of glyphs in area of row A. */
1209 struct glyph
*glyph_a
= a
->glyphs
[area
];
1211 /* End + 1 of glyphs in area of row A. */
1212 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1214 /* Start of glyphs in area of row B. */
1215 struct glyph
*glyph_b
= b
->glyphs
[area
];
1217 while (glyph_a
< glyph_a_end
)
1219 /* Non-ISO HP/UX compiler doesn't like auto struct
1223 *glyph_a
= *glyph_b
;
1233 /* Exchange pointers to glyph memory between glyph rows A and B. */
1236 swap_glyph_pointers (a
, b
)
1237 struct glyph_row
*a
, *b
;
1240 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1242 struct glyph
*temp
= a
->glyphs
[i
];
1243 a
->glyphs
[i
] = b
->glyphs
[i
];
1244 b
->glyphs
[i
] = temp
;
1249 /* Copy glyph row structure FROM to glyph row structure TO, except
1250 that glyph pointers in the structures are left unchanged. */
1253 copy_row_except_pointers (to
, from
)
1254 struct glyph_row
*to
, *from
;
1256 struct glyph
*pointers
[1 + LAST_AREA
];
1258 /* Save glyph pointers of TO. */
1259 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1261 /* Do a structure assignment. */
1264 /* Restore original pointers of TO. */
1265 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1269 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1270 TO and FROM are left unchanged. Glyph contents are copied from the
1271 glyph memory of FROM to the glyph memory of TO. Increment buffer
1272 positions in row TO by DELTA/ DELTA_BYTES. */
1275 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1276 struct glyph_row
*to
, *from
;
1277 int delta
, delta_bytes
;
1281 /* This is like a structure assignment TO = FROM, except that
1282 glyph pointers in the rows are left unchanged. */
1283 copy_row_except_pointers (to
, from
);
1285 /* Copy glyphs from FROM to TO. */
1286 for (area
= 0; area
< LAST_AREA
; ++area
)
1287 if (from
->used
[area
])
1288 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1289 from
->used
[area
] * sizeof (struct glyph
));
1291 /* Increment buffer positions in TO by DELTA. */
1292 increment_row_positions (to
, delta
, delta_bytes
);
1296 /* Assign glyph row FROM to glyph row TO. This works like a structure
1297 assignment TO = FROM, except that glyph pointers are not copied but
1298 exchanged between TO and FROM. Pointers must be exchanged to avoid
1302 assign_row (to
, from
)
1303 struct glyph_row
*to
, *from
;
1305 swap_glyph_pointers (to
, from
);
1306 copy_row_except_pointers (to
, from
);
1310 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1311 a row in a window matrix, is a slice of the glyph memory of the
1312 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1313 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1314 memory of FRAME_ROW. */
1319 glyph_row_slice_p (window_row
, frame_row
)
1320 struct glyph_row
*window_row
, *frame_row
;
1322 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1323 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1324 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1326 return (frame_glyph_start
<= window_glyph_start
1327 && window_glyph_start
< frame_glyph_end
);
1330 #endif /* GLYPH_DEBUG */
1334 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1335 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1336 in WINDOW_MATRIX is found satisfying the condition. */
1338 static struct glyph_row
*
1339 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1340 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1345 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1347 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1348 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1349 frame_matrix
->rows
+ row
))
1352 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1357 /* Prepare ROW for display. Desired rows are cleared lazily,
1358 i.e. they are only marked as to be cleared by setting their
1359 enabled_p flag to zero. When a row is to be displayed, a prior
1360 call to this function really clears it. */
1363 prepare_desired_row (row
)
1364 struct glyph_row
*row
;
1366 if (!row
->enabled_p
)
1368 clear_glyph_row (row
);
1374 /* Return a hash code for glyph row ROW. */
1377 line_hash_code (row
)
1378 struct glyph_row
*row
;
1384 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1385 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1389 int c
= glyph
->u
.ch
;
1390 int face_id
= glyph
->face_id
;
1391 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1393 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1394 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1406 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1407 the number of characters in the line. If must_write_spaces is
1408 zero, leading and trailing spaces are ignored. */
1411 line_draw_cost (matrix
, vpos
)
1412 struct glyph_matrix
*matrix
;
1415 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1416 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1417 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1419 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1420 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1422 /* Ignore trailing and leading spaces if we can. */
1423 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1425 /* Skip from the end over trailing spaces. */
1426 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1429 /* All blank line. */
1433 /* Skip over leading spaces. */
1434 while (CHAR_GLYPH_SPACE_P (*beg
))
1438 /* If we don't have a glyph-table, each glyph is one character,
1439 so return the number of glyphs. */
1440 if (glyph_table_base
== 0)
1444 /* Otherwise, scan the glyphs and accumulate their total length
1449 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1452 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1455 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1465 /* Test two glyph rows A and B for equality. Value is non-zero if A
1466 and B have equal contents. W is the window to which the glyphs
1467 rows A and B belong. It is needed here to test for partial row
1468 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1469 flags of A and B, too. */
1472 row_equal_p (w
, a
, b
, mouse_face_p
)
1474 struct glyph_row
*a
, *b
;
1479 else if (a
->hash
!= b
->hash
)
1483 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1486 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1489 /* Compare glyphs. */
1490 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1492 if (a
->used
[area
] != b
->used
[area
])
1495 a_glyph
= a
->glyphs
[area
];
1496 a_end
= a_glyph
+ a
->used
[area
];
1497 b_glyph
= b
->glyphs
[area
];
1499 while (a_glyph
< a_end
1500 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1501 ++a_glyph
, ++b_glyph
;
1503 if (a_glyph
!= a_end
)
1507 if (a
->fill_line_p
!= b
->fill_line_p
1508 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1509 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1510 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1511 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1512 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1513 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1514 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1515 || a
->overlapped_p
!= b
->overlapped_p
1516 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1517 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1518 /* Different partially visible characters on left margin. */
1520 /* Different height. */
1521 || a
->ascent
!= b
->ascent
1522 || a
->phys_ascent
!= b
->phys_ascent
1523 || a
->phys_height
!= b
->phys_height
1524 || a
->visible_height
!= b
->visible_height
)
1533 /***********************************************************************
1536 See dispextern.h for an overall explanation of glyph pools.
1537 ***********************************************************************/
1539 /* Allocate a glyph_pool structure. The structure returned is
1540 initialized with zeros. The global variable glyph_pool_count is
1541 incremented for each pool allocated. */
1543 static struct glyph_pool
*
1546 struct glyph_pool
*result
;
1548 /* Allocate a new glyph_pool and clear it. */
1549 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1550 bzero (result
, sizeof *result
);
1552 /* For memory leak and double deletion checking. */
1559 /* Free a glyph_pool structure POOL. The function may be called with
1560 a null POOL pointer. The global variable glyph_pool_count is
1561 decremented with every pool structure freed. If this count gets
1562 negative, more structures were freed than allocated, i.e. one
1563 structure must have been freed more than once or a bogus pointer
1564 was passed to free_glyph_pool. */
1567 free_glyph_pool (pool
)
1568 struct glyph_pool
*pool
;
1572 /* More freed than allocated? */
1574 xassert (glyph_pool_count
>= 0);
1576 xfree (pool
->glyphs
);
1582 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1583 columns we need. This function never shrinks a pool. The only
1584 case in which this would make sense, would be when a frame's size
1585 is changed from a large value to a smaller one. But, if someone
1586 does it once, we can expect that he will do it again.
1588 Value is non-zero if the pool changed in a way which makes
1589 re-adjusting window glyph matrices necessary. */
1592 realloc_glyph_pool (pool
, matrix_dim
)
1593 struct glyph_pool
*pool
;
1594 struct dim matrix_dim
;
1599 changed_p
= (pool
->glyphs
== 0
1600 || matrix_dim
.height
!= pool
->nrows
1601 || matrix_dim
.width
!= pool
->ncolumns
);
1603 /* Enlarge the glyph pool. */
1604 needed
= matrix_dim
.width
* matrix_dim
.height
;
1605 if (needed
> pool
->nglyphs
)
1607 int size
= needed
* sizeof (struct glyph
);
1610 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1613 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1614 bzero (pool
->glyphs
, size
);
1617 pool
->nglyphs
= needed
;
1620 /* Remember the number of rows and columns because (a) we use them
1621 to do sanity checks, and (b) the number of columns determines
1622 where rows in the frame matrix start---this must be available to
1623 determine pointers to rows of window sub-matrices. */
1624 pool
->nrows
= matrix_dim
.height
;
1625 pool
->ncolumns
= matrix_dim
.width
;
1632 /***********************************************************************
1634 ***********************************************************************/
1639 /* Flush standard output. This is sometimes useful to call from the debugger.
1640 XXX Maybe this should be changed to flush the current terminal instead of
1651 /* Check that no glyph pointers have been lost in MATRIX. If a
1652 pointer has been lost, e.g. by using a structure assignment between
1653 rows, at least one pointer must occur more than once in the rows of
1657 check_matrix_pointer_lossage (matrix
)
1658 struct glyph_matrix
*matrix
;
1662 for (i
= 0; i
< matrix
->nrows
; ++i
)
1663 for (j
= 0; j
< matrix
->nrows
; ++j
)
1665 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1666 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1670 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1673 matrix_row (matrix
, row
)
1674 struct glyph_matrix
*matrix
;
1677 xassert (matrix
&& matrix
->rows
);
1678 xassert (row
>= 0 && row
< matrix
->nrows
);
1680 /* That's really too slow for normal testing because this function
1681 is called almost everywhere. Although---it's still astonishingly
1682 fast, so it is valuable to have for debugging purposes. */
1684 check_matrix_pointer_lossage (matrix
);
1687 return matrix
->rows
+ row
;
1691 #if 0 /* This function makes invalid assumptions when text is
1692 partially invisible. But it might come handy for debugging
1695 /* Check invariants that must hold for an up to date current matrix of
1699 check_matrix_invariants (w
)
1702 struct glyph_matrix
*matrix
= w
->current_matrix
;
1703 int yb
= window_text_bottom_y (w
);
1704 struct glyph_row
*row
= matrix
->rows
;
1705 struct glyph_row
*last_text_row
= NULL
;
1706 struct buffer
*saved
= current_buffer
;
1707 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1710 /* This can sometimes happen for a fresh window. */
1711 if (matrix
->nrows
< 2)
1714 set_buffer_temp (buffer
);
1716 /* Note: last row is always reserved for the mode line. */
1717 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1718 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1720 struct glyph_row
*next
= row
+ 1;
1722 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1723 last_text_row
= row
;
1725 /* Check that character and byte positions are in sync. */
1726 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1727 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1729 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1730 have such a position temporarily in case of a minibuffer
1731 displaying something like `[Sole completion]' at its end. */
1732 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1733 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1734 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1736 /* Check that end position of `row' is equal to start position
1738 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1740 xassert (MATRIX_ROW_END_CHARPOS (row
)
1741 == MATRIX_ROW_START_CHARPOS (next
));
1742 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1743 == MATRIX_ROW_START_BYTEPOS (next
));
1748 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1749 xassert (w
->desired_matrix
->rows
!= NULL
);
1750 set_buffer_temp (saved
);
1755 #endif /* GLYPH_DEBUG != 0 */
1759 /**********************************************************************
1760 Allocating/ Adjusting Glyph Matrices
1761 **********************************************************************/
1763 /* Allocate glyph matrices over a window tree for a frame-based
1766 X and Y are column/row within the frame glyph matrix where
1767 sub-matrices for the window tree rooted at WINDOW must be
1768 allocated. CH_DIM contains the dimensions of the smallest
1769 character that could be used during display. DIM_ONLY_P non-zero
1770 means that the caller of this function is only interested in the
1771 result matrix dimension, and matrix adjustments should not be
1774 The function returns the total width/height of the sub-matrices of
1775 the window tree. If called on a frame root window, the computation
1776 will take the mini-buffer window into account.
1778 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1780 NEW_LEAF_MATRIX set if any window in the tree did not have a
1781 glyph matrices yet, and
1783 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1784 any window in the tree will be changed or have been changed (see
1787 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1790 Windows are arranged into chains of windows on the same level
1791 through the next fields of window structures. Such a level can be
1792 either a sequence of horizontally adjacent windows from left to
1793 right, or a sequence of vertically adjacent windows from top to
1794 bottom. Each window in a horizontal sequence can be either a leaf
1795 window or a vertical sequence; a window in a vertical sequence can
1796 be either a leaf or a horizontal sequence. All windows in a
1797 horizontal sequence have the same height, and all windows in a
1798 vertical sequence have the same width.
1800 This function uses, for historical reasons, a more general
1801 algorithm to determine glyph matrix dimensions that would be
1804 The matrix height of a horizontal sequence is determined by the
1805 maximum height of any matrix in the sequence. The matrix width of
1806 a horizontal sequence is computed by adding up matrix widths of
1807 windows in the sequence.
1809 |<------- result width ------->|
1810 +---------+----------+---------+ ---
1813 +---------+ | | result height
1818 The matrix width of a vertical sequence is the maximum matrix width
1819 of any window in the sequence. Its height is computed by adding up
1820 matrix heights of windows in the sequence.
1822 |<---- result width -->|
1830 +------------+---------+ |
1833 +------------+---------+ --- */
1835 /* Bit indicating that a new matrix will be allocated or has been
1838 #define NEW_LEAF_MATRIX (1 << 0)
1840 /* Bit indicating that a matrix will or has changed its location or
1843 #define CHANGED_LEAF_MATRIX (1 << 1)
1846 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1847 window_change_flags
)
1851 int *window_change_flags
;
1853 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1855 int wmax
= 0, hmax
= 0;
1859 int in_horz_combination_p
;
1861 /* What combination is WINDOW part of? Compute this once since the
1862 result is the same for all windows in the `next' chain. The
1863 special case of a root window (parent equal to nil) is treated
1864 like a vertical combination because a root window's `next'
1865 points to the mini-buffer window, if any, which is arranged
1866 vertically below other windows. */
1867 in_horz_combination_p
1868 = (!NILP (XWINDOW (window
)->parent
)
1869 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1871 /* For WINDOW and all windows on the same level. */
1874 w
= XWINDOW (window
);
1876 /* Get the dimension of the window sub-matrix for W, depending
1877 on whether this is a combination or a leaf window. */
1878 if (!NILP (w
->hchild
))
1879 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1881 window_change_flags
);
1882 else if (!NILP (w
->vchild
))
1883 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1885 window_change_flags
);
1888 /* If not already done, allocate sub-matrix structures. */
1889 if (w
->desired_matrix
== NULL
)
1891 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1892 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1893 *window_change_flags
|= NEW_LEAF_MATRIX
;
1896 /* Width and height MUST be chosen so that there are no
1897 holes in the frame matrix. */
1898 dim
.width
= required_matrix_width (w
);
1899 dim
.height
= required_matrix_height (w
);
1901 /* Will matrix be re-allocated? */
1902 if (x
!= w
->desired_matrix
->matrix_x
1903 || y
!= w
->desired_matrix
->matrix_y
1904 || dim
.width
!= w
->desired_matrix
->matrix_w
1905 || dim
.height
!= w
->desired_matrix
->matrix_h
1906 || (margin_glyphs_to_reserve (w
, dim
.width
,
1907 w
->left_margin_cols
)
1908 != w
->desired_matrix
->left_margin_glyphs
)
1909 || (margin_glyphs_to_reserve (w
, dim
.width
,
1910 w
->right_margin_cols
)
1911 != w
->desired_matrix
->right_margin_glyphs
))
1912 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1914 /* Actually change matrices, if allowed. Do not consider
1915 CHANGED_LEAF_MATRIX computed above here because the pool
1916 may have been changed which we don't now here. We trust
1917 that we only will be called with DIM_ONLY_P != 0 when
1921 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1922 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1926 /* If we are part of a horizontal combination, advance x for
1927 windows to the right of W; otherwise advance y for windows
1929 if (in_horz_combination_p
)
1934 /* Remember maximum glyph matrix dimensions. */
1935 wmax
= max (wmax
, dim
.width
);
1936 hmax
= max (hmax
, dim
.height
);
1938 /* Next window on same level. */
1941 while (!NILP (window
));
1943 /* Set `total' to the total glyph matrix dimension of this window
1944 level. In a vertical combination, the width is the width of the
1945 widest window; the height is the y we finally reached, corrected
1946 by the y we started with. In a horizontal combination, the total
1947 height is the height of the tallest window, and the width is the
1948 x we finally reached, corrected by the x we started with. */
1949 if (in_horz_combination_p
)
1951 total
.width
= x
- x0
;
1952 total
.height
= hmax
;
1957 total
.height
= y
- y0
;
1964 /* Return the required height of glyph matrices for window W. */
1967 required_matrix_height (w
)
1970 #ifdef HAVE_WINDOW_SYSTEM
1971 struct frame
*f
= XFRAME (w
->frame
);
1973 if (FRAME_WINDOW_P (f
))
1975 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1976 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1977 return (((window_pixel_height
+ ch_height
- 1)
1978 / ch_height
) * w
->nrows_scale_factor
1979 /* One partially visible line at the top and
1980 bottom of the window. */
1982 /* 2 for header and mode line. */
1985 #endif /* HAVE_WINDOW_SYSTEM */
1987 return WINDOW_TOTAL_LINES (w
);
1991 /* Return the required width of glyph matrices for window W. */
1994 required_matrix_width (w
)
1997 #ifdef HAVE_WINDOW_SYSTEM
1998 struct frame
*f
= XFRAME (w
->frame
);
1999 if (FRAME_WINDOW_P (f
))
2001 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2002 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2004 /* Compute number of glyphs needed in a glyph row. */
2005 return (((window_pixel_width
+ ch_width
- 1)
2006 / ch_width
) * w
->ncols_scale_factor
2007 /* 2 partially visible columns in the text area. */
2009 /* One partially visible column at the right
2010 edge of each marginal area. */
2013 #endif /* HAVE_WINDOW_SYSTEM */
2015 return XINT (w
->total_cols
);
2019 /* Allocate window matrices for window-based redisplay. W is the
2020 window whose matrices must be allocated/reallocated. CH_DIM is the
2021 size of the smallest character that could potentially be used on W. */
2024 allocate_matrices_for_window_redisplay (w
)
2029 if (!NILP (w
->vchild
))
2030 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2031 else if (!NILP (w
->hchild
))
2032 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2035 /* W is a leaf window. */
2038 /* If matrices are not yet allocated, allocate them now. */
2039 if (w
->desired_matrix
== NULL
)
2041 w
->desired_matrix
= new_glyph_matrix (NULL
);
2042 w
->current_matrix
= new_glyph_matrix (NULL
);
2045 dim
.width
= required_matrix_width (w
);
2046 dim
.height
= required_matrix_height (w
);
2047 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2048 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2051 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2056 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2057 do it for all frames; otherwise do it just for the given frame.
2058 This function must be called when a new frame is created, its size
2059 changes, or its window configuration changes. */
2065 /* Block input so that expose events and other events that access
2066 glyph matrices are not processed while we are changing them. */
2070 adjust_frame_glyphs (f
);
2073 Lisp_Object tail
, lisp_frame
;
2075 FOR_EACH_FRAME (tail
, lisp_frame
)
2076 adjust_frame_glyphs (XFRAME (lisp_frame
));
2083 /* Adjust frame glyphs when Emacs is initialized.
2085 To be called from init_display.
2087 We need a glyph matrix because redraw will happen soon.
2088 Unfortunately, window sizes on selected_frame are not yet set to
2089 meaningful values. I believe we can assume that there are only two
2090 windows on the frame---the mini-buffer and the root window. Frame
2091 height and width seem to be correct so far. So, set the sizes of
2092 windows to estimated values. */
2095 adjust_frame_glyphs_initially ()
2097 struct frame
*sf
= SELECTED_FRAME ();
2098 struct window
*root
= XWINDOW (sf
->root_window
);
2099 struct window
*mini
= XWINDOW (root
->next
);
2100 int frame_lines
= FRAME_LINES (sf
);
2101 int frame_cols
= FRAME_COLS (sf
);
2102 int top_margin
= FRAME_TOP_MARGIN (sf
);
2104 /* Do it for the root window. */
2105 XSETFASTINT (root
->top_line
, top_margin
);
2106 XSETFASTINT (root
->total_cols
, frame_cols
);
2107 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2109 /* Do it for the mini-buffer window. */
2110 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2111 XSETFASTINT (mini
->total_cols
, frame_cols
);
2112 set_window_height (root
->next
, 1, 0);
2114 adjust_frame_glyphs (sf
);
2115 glyphs_initialized_initially_p
= 1;
2119 /* Allocate/reallocate glyph matrices of a single frame F. */
2122 adjust_frame_glyphs (f
)
2125 if (FRAME_WINDOW_P (f
))
2126 adjust_frame_glyphs_for_window_redisplay (f
);
2128 adjust_frame_glyphs_for_frame_redisplay (f
);
2130 /* Don't forget the message buffer and the buffer for
2131 decode_mode_spec. */
2132 adjust_frame_message_buffer (f
);
2133 adjust_decode_mode_spec_buffer (f
);
2135 f
->glyphs_initialized_p
= 1;
2139 /* In the window tree with root W, build current matrices of leaf
2140 windows from the frame's current matrix. */
2143 fake_current_matrices (window
)
2148 for (; !NILP (window
); window
= w
->next
)
2150 w
= XWINDOW (window
);
2152 if (!NILP (w
->hchild
))
2153 fake_current_matrices (w
->hchild
);
2154 else if (!NILP (w
->vchild
))
2155 fake_current_matrices (w
->vchild
);
2159 struct frame
*f
= XFRAME (w
->frame
);
2160 struct glyph_matrix
*m
= w
->current_matrix
;
2161 struct glyph_matrix
*fm
= f
->current_matrix
;
2163 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2164 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2166 for (i
= 0; i
< m
->matrix_h
; ++i
)
2168 struct glyph_row
*r
= m
->rows
+ i
;
2169 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2171 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2172 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2174 r
->enabled_p
= fr
->enabled_p
;
2177 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2178 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2179 r
->used
[TEXT_AREA
] = (m
->matrix_w
2180 - r
->used
[LEFT_MARGIN_AREA
]
2181 - r
->used
[RIGHT_MARGIN_AREA
]);
2190 /* Save away the contents of frame F's current frame matrix. Value is
2191 a glyph matrix holding the contents of F's current frame matrix. */
2193 static struct glyph_matrix
*
2194 save_current_matrix (f
)
2198 struct glyph_matrix
*saved
;
2200 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2201 bzero (saved
, sizeof *saved
);
2202 saved
->nrows
= f
->current_matrix
->nrows
;
2203 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2204 * sizeof *saved
->rows
);
2205 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2207 for (i
= 0; i
< saved
->nrows
; ++i
)
2209 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2210 struct glyph_row
*to
= saved
->rows
+ i
;
2211 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2212 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2213 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2214 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2221 /* Restore the contents of frame F's current frame matrix from SAVED,
2222 and free memory associated with SAVED. */
2225 restore_current_matrix (f
, saved
)
2227 struct glyph_matrix
*saved
;
2231 for (i
= 0; i
< saved
->nrows
; ++i
)
2233 struct glyph_row
*from
= saved
->rows
+ i
;
2234 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2235 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2236 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2237 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2238 xfree (from
->glyphs
[TEXT_AREA
]);
2241 xfree (saved
->rows
);
2247 /* Allocate/reallocate glyph matrices of a single frame F for
2248 frame-based redisplay. */
2251 adjust_frame_glyphs_for_frame_redisplay (f
)
2255 struct dim matrix_dim
;
2257 int window_change_flags
;
2260 if (!FRAME_LIVE_P (f
))
2263 /* Determine the smallest character in any font for F. On
2264 console windows, all characters have dimension (1, 1). */
2265 ch_dim
.width
= ch_dim
.height
= 1;
2267 top_window_y
= FRAME_TOP_MARGIN (f
);
2269 /* Allocate glyph pool structures if not already done. */
2270 if (f
->desired_pool
== NULL
)
2272 f
->desired_pool
= new_glyph_pool ();
2273 f
->current_pool
= new_glyph_pool ();
2276 /* Allocate frames matrix structures if needed. */
2277 if (f
->desired_matrix
== NULL
)
2279 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2280 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2283 /* Compute window glyph matrices. (This takes the mini-buffer
2284 window into account). The result is the size of the frame glyph
2285 matrix needed. The variable window_change_flags is set to a bit
2286 mask indicating whether new matrices will be allocated or
2287 existing matrices change their size or location within the frame
2289 window_change_flags
= 0;
2291 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2294 &window_change_flags
);
2296 /* Add in menu bar lines, if any. */
2297 matrix_dim
.height
+= top_window_y
;
2299 /* Enlarge pools as necessary. */
2300 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2301 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2303 /* Set up glyph pointers within window matrices. Do this only if
2304 absolutely necessary since it requires a frame redraw. */
2305 if (pool_changed_p
|| window_change_flags
)
2307 /* Do it for window matrices. */
2308 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2310 &window_change_flags
);
2312 /* Size of frame matrices must equal size of frame. Note
2313 that we are called for X frames with window widths NOT equal
2314 to the frame width (from CHANGE_FRAME_SIZE_1). */
2315 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2316 && matrix_dim
.height
== FRAME_LINES (f
));
2318 /* Pointers to glyph memory in glyph rows are exchanged during
2319 the update phase of redisplay, which means in general that a
2320 frame's current matrix consists of pointers into both the
2321 desired and current glyph pool of the frame. Adjusting a
2322 matrix sets the frame matrix up so that pointers are all into
2323 the same pool. If we want to preserve glyph contents of the
2324 current matrix over a call to adjust_glyph_matrix, we must
2325 make a copy of the current glyphs, and restore the current
2326 matrix' contents from that copy. */
2327 if (display_completed
2328 && !FRAME_GARBAGED_P (f
)
2329 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2330 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2332 struct glyph_matrix
*copy
= save_current_matrix (f
);
2333 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2334 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2335 restore_current_matrix (f
, copy
);
2336 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2340 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2341 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2342 SET_FRAME_GARBAGED (f
);
2348 /* Allocate/reallocate glyph matrices of a single frame F for
2349 window-based redisplay. */
2352 adjust_frame_glyphs_for_window_redisplay (f
)
2358 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2360 /* Get minimum sizes. */
2361 #ifdef HAVE_WINDOW_SYSTEM
2362 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2363 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2365 ch_dim
.width
= ch_dim
.height
= 1;
2368 /* Allocate/reallocate window matrices. */
2369 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2371 /* Allocate/ reallocate matrices of the dummy window used to display
2372 the menu bar under X when no X toolkit support is available. */
2373 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2375 /* Allocate a dummy window if not already done. */
2376 if (NILP (f
->menu_bar_window
))
2378 f
->menu_bar_window
= make_window ();
2379 w
= XWINDOW (f
->menu_bar_window
);
2380 XSETFRAME (w
->frame
, f
);
2381 w
->pseudo_window_p
= 1;
2384 w
= XWINDOW (f
->menu_bar_window
);
2386 /* Set window dimensions to frame dimensions and allocate or
2387 adjust glyph matrices of W. */
2388 XSETFASTINT (w
->top_line
, 0);
2389 XSETFASTINT (w
->left_col
, 0);
2390 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2391 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2392 allocate_matrices_for_window_redisplay (w
);
2394 #endif /* not USE_X_TOOLKIT */
2397 /* Allocate/ reallocate matrices of the tool bar window. If we
2398 don't have a tool bar window yet, make one. */
2399 if (NILP (f
->tool_bar_window
))
2401 f
->tool_bar_window
= make_window ();
2402 w
= XWINDOW (f
->tool_bar_window
);
2403 XSETFRAME (w
->frame
, f
);
2404 w
->pseudo_window_p
= 1;
2407 w
= XWINDOW (f
->tool_bar_window
);
2409 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2410 XSETFASTINT (w
->left_col
, 0);
2411 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2412 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2413 allocate_matrices_for_window_redisplay (w
);
2418 /* Adjust/ allocate message buffer of frame F.
2420 Note that the message buffer is never freed. Since I could not
2421 find a free in 19.34, I assume that freeing it would be
2422 problematic in some way and don't do it either.
2424 (Implementation note: It should be checked if we can free it
2425 eventually without causing trouble). */
2428 adjust_frame_message_buffer (f
)
2431 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2433 if (FRAME_MESSAGE_BUF (f
))
2435 char *buffer
= FRAME_MESSAGE_BUF (f
);
2436 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2437 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2440 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2444 /* Re-allocate buffer for decode_mode_spec on frame F. */
2447 adjust_decode_mode_spec_buffer (f
)
2450 f
->decode_mode_spec_buffer
2451 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2452 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2457 /**********************************************************************
2458 Freeing Glyph Matrices
2459 **********************************************************************/
2461 /* Free glyph memory for a frame F. F may be null. This function can
2462 be called for the same frame more than once. The root window of
2463 F may be nil when this function is called. This is the case when
2464 the function is called when F is destroyed. */
2470 if (f
&& f
->glyphs_initialized_p
)
2472 /* Block interrupt input so that we don't get surprised by an X
2473 event while we're in an inconsistent state. */
2475 f
->glyphs_initialized_p
= 0;
2477 /* Release window sub-matrices. */
2478 if (!NILP (f
->root_window
))
2479 free_window_matrices (XWINDOW (f
->root_window
));
2481 /* Free the dummy window for menu bars without X toolkit and its
2483 if (!NILP (f
->menu_bar_window
))
2485 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2486 free_glyph_matrix (w
->desired_matrix
);
2487 free_glyph_matrix (w
->current_matrix
);
2488 w
->desired_matrix
= w
->current_matrix
= NULL
;
2489 f
->menu_bar_window
= Qnil
;
2492 /* Free the tool bar window and its glyph matrices. */
2493 if (!NILP (f
->tool_bar_window
))
2495 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2496 free_glyph_matrix (w
->desired_matrix
);
2497 free_glyph_matrix (w
->current_matrix
);
2498 w
->desired_matrix
= w
->current_matrix
= NULL
;
2499 f
->tool_bar_window
= Qnil
;
2502 /* Release frame glyph matrices. Reset fields to zero in
2503 case we are called a second time. */
2504 if (f
->desired_matrix
)
2506 free_glyph_matrix (f
->desired_matrix
);
2507 free_glyph_matrix (f
->current_matrix
);
2508 f
->desired_matrix
= f
->current_matrix
= NULL
;
2511 /* Release glyph pools. */
2512 if (f
->desired_pool
)
2514 free_glyph_pool (f
->desired_pool
);
2515 free_glyph_pool (f
->current_pool
);
2516 f
->desired_pool
= f
->current_pool
= NULL
;
2524 /* Free glyph sub-matrices in the window tree rooted at W. This
2525 function may be called with a null pointer, and it may be called on
2526 the same tree more than once. */
2529 free_window_matrices (w
)
2534 if (!NILP (w
->hchild
))
2535 free_window_matrices (XWINDOW (w
->hchild
));
2536 else if (!NILP (w
->vchild
))
2537 free_window_matrices (XWINDOW (w
->vchild
));
2540 /* This is a leaf window. Free its memory and reset fields
2541 to zero in case this function is called a second time for
2543 free_glyph_matrix (w
->current_matrix
);
2544 free_glyph_matrix (w
->desired_matrix
);
2545 w
->current_matrix
= w
->desired_matrix
= NULL
;
2548 /* Next window on same level. */
2549 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2554 /* Check glyph memory leaks. This function is called from
2555 shut_down_emacs. Note that frames are not destroyed when Emacs
2556 exits. We therefore free all glyph memory for all active frames
2557 explicitly and check that nothing is left allocated. */
2560 check_glyph_memory ()
2562 Lisp_Object tail
, frame
;
2564 /* Free glyph memory for all frames. */
2565 FOR_EACH_FRAME (tail
, frame
)
2566 free_glyphs (XFRAME (frame
));
2568 /* Check that nothing is left allocated. */
2569 if (glyph_matrix_count
)
2571 if (glyph_pool_count
)
2577 /**********************************************************************
2578 Building a Frame Matrix
2579 **********************************************************************/
2581 /* Most of the redisplay code works on glyph matrices attached to
2582 windows. This is a good solution most of the time, but it is not
2583 suitable for terminal code. Terminal output functions cannot rely
2584 on being able to set an arbitrary terminal window. Instead they
2585 must be provided with a view of the whole frame, i.e. the whole
2586 screen. We build such a view by constructing a frame matrix from
2587 window matrices in this section.
2589 Windows that must be updated have their must_be_update_p flag set.
2590 For all such windows, their desired matrix is made part of the
2591 desired frame matrix. For other windows, their current matrix is
2592 made part of the desired frame matrix.
2594 +-----------------+----------------+
2595 | desired | desired |
2597 +-----------------+----------------+
2600 +----------------------------------+
2602 Desired window matrices can be made part of the frame matrix in a
2603 cheap way: We exploit the fact that the desired frame matrix and
2604 desired window matrices share their glyph memory. This is not
2605 possible for current window matrices. Their glyphs are copied to
2606 the desired frame matrix. The latter is equivalent to
2607 preserve_other_columns in the old redisplay.
2609 Used glyphs counters for frame matrix rows are the result of adding
2610 up glyph lengths of the window matrices. A line in the frame
2611 matrix is enabled, if a corresponding line in a window matrix is
2614 After building the desired frame matrix, it will be passed to
2615 terminal code, which will manipulate both the desired and current
2616 frame matrix. Changes applied to the frame's current matrix have
2617 to be visible in current window matrices afterwards, of course.
2619 This problem is solved like this:
2621 1. Window and frame matrices share glyphs. Window matrices are
2622 constructed in a way that their glyph contents ARE the glyph
2623 contents needed in a frame matrix. Thus, any modification of
2624 glyphs done in terminal code will be reflected in window matrices
2627 2. Exchanges of rows in a frame matrix done by terminal code are
2628 intercepted by hook functions so that corresponding row operations
2629 on window matrices can be performed. This is necessary because we
2630 use pointers to glyphs in glyph row structures. To satisfy the
2631 assumption of point 1 above that glyphs are updated implicitly in
2632 window matrices when they are manipulated via the frame matrix,
2633 window and frame matrix must of course agree where to find the
2634 glyphs for their rows. Possible manipulations that must be
2635 mirrored are assignments of rows of the desired frame matrix to the
2636 current frame matrix and scrolling the current frame matrix. */
2638 /* Build frame F's desired matrix from window matrices. Only windows
2639 which have the flag must_be_updated_p set have to be updated. Menu
2640 bar lines of a frame are not covered by window matrices, so make
2641 sure not to touch them in this function. */
2644 build_frame_matrix (f
)
2649 /* F must have a frame matrix when this function is called. */
2650 xassert (!FRAME_WINDOW_P (f
));
2652 /* Clear all rows in the frame matrix covered by window matrices.
2653 Menu bar lines are not covered by windows. */
2654 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2655 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2657 /* Build the matrix by walking the window tree. */
2658 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2659 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2663 /* Walk a window tree, building a frame matrix MATRIX from window
2664 matrices. W is the root of a window tree. */
2667 build_frame_matrix_from_window_tree (matrix
, w
)
2668 struct glyph_matrix
*matrix
;
2673 if (!NILP (w
->hchild
))
2674 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2675 else if (!NILP (w
->vchild
))
2676 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2678 build_frame_matrix_from_leaf_window (matrix
, w
);
2680 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2685 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2686 desired frame matrix built. W is a leaf window whose desired or
2687 current matrix is to be added to FRAME_MATRIX. W's flag
2688 must_be_updated_p determines which matrix it contributes to
2689 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2690 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2691 Adding a desired matrix means setting up used counters and such in
2692 frame rows, while adding a current window matrix to FRAME_MATRIX
2693 means copying glyphs. The latter case corresponds to
2694 preserve_other_columns in the old redisplay. */
2697 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2698 struct glyph_matrix
*frame_matrix
;
2701 struct glyph_matrix
*window_matrix
;
2702 int window_y
, frame_y
;
2703 /* If non-zero, a glyph to insert at the right border of W. */
2704 GLYPH right_border_glyph
= 0;
2706 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2707 if (w
->must_be_updated_p
)
2709 window_matrix
= w
->desired_matrix
;
2711 /* Decide whether we want to add a vertical border glyph. */
2712 if (!WINDOW_RIGHTMOST_P (w
))
2714 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2717 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2718 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2721 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2723 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2727 window_matrix
= w
->current_matrix
;
2729 /* For all rows in the window matrix and corresponding rows in the
2732 frame_y
= window_matrix
->matrix_y
;
2733 while (window_y
< window_matrix
->nrows
)
2735 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2736 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2737 int current_row_p
= window_matrix
== w
->current_matrix
;
2739 /* Fill up the frame row with spaces up to the left margin of the
2741 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2743 /* Fill up areas in the window matrix row with spaces. */
2744 fill_up_glyph_row_with_spaces (window_row
);
2746 /* If only part of W's desired matrix has been built, and
2747 window_row wasn't displayed, use the corresponding current
2749 if (window_matrix
== w
->desired_matrix
2750 && !window_row
->enabled_p
)
2752 window_row
= w
->current_matrix
->rows
+ window_y
;
2758 /* Copy window row to frame row. */
2759 bcopy (window_row
->glyphs
[0],
2760 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2761 window_matrix
->matrix_w
* sizeof (struct glyph
));
2765 xassert (window_row
->enabled_p
);
2767 /* Only when a desired row has been displayed, we want
2768 the corresponding frame row to be updated. */
2769 frame_row
->enabled_p
= 1;
2771 /* Maybe insert a vertical border between horizontally adjacent
2773 if (right_border_glyph
)
2775 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2776 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2780 /* Window row window_y must be a slice of frame row
2782 xassert (glyph_row_slice_p (window_row
, frame_row
));
2784 /* If rows are in sync, we don't have to copy glyphs because
2785 frame and window share glyphs. */
2787 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2788 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2792 /* Set number of used glyphs in the frame matrix. Since we fill
2793 up with spaces, and visit leaf windows from left to right it
2794 can be done simply. */
2795 frame_row
->used
[TEXT_AREA
]
2796 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2804 /* Given a user-specified glyph, possibly including a Lisp-level face
2805 ID, return a glyph that has a realized face ID.
2806 This is used for glyphs displayed specially and not part of the text;
2807 for instance, vertical separators, truncation markers, etc. */
2810 spec_glyph_lookup_face (w
, glyph
)
2814 int lface_id
= FAST_GLYPH_FACE (glyph
);
2815 /* Convert the glyph's specified face to a realized (cache) face. */
2818 int face_id
= merge_faces (XFRAME (w
->frame
),
2819 Qt
, lface_id
, DEFAULT_FACE_ID
);
2821 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2826 /* Add spaces to a glyph row ROW in a window matrix.
2828 Each row has the form:
2830 +---------+-----------------------------+------------+
2831 | left | text | right |
2832 +---------+-----------------------------+------------+
2834 Left and right marginal areas are optional. This function adds
2835 spaces to areas so that there are no empty holes between areas.
2836 In other words: If the right area is not empty, the text area
2837 is filled up with spaces up to the right area. If the text area
2838 is not empty, the left area is filled up.
2840 To be called for frame-based redisplay, only. */
2843 fill_up_glyph_row_with_spaces (row
)
2844 struct glyph_row
*row
;
2846 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2847 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2848 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2852 /* Fill area AREA of glyph row ROW with spaces. To be called for
2853 frame-based redisplay only. */
2856 fill_up_glyph_row_area_with_spaces (row
, area
)
2857 struct glyph_row
*row
;
2860 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2862 struct glyph
*end
= row
->glyphs
[area
+ 1];
2863 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2866 *text
++ = space_glyph
;
2867 row
->used
[area
] = text
- row
->glyphs
[area
];
2872 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2873 reached. In frame matrices only one area, TEXT_AREA, is used. */
2876 fill_up_frame_row_with_spaces (row
, upto
)
2877 struct glyph_row
*row
;
2880 int i
= row
->used
[TEXT_AREA
];
2881 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2884 glyph
[i
++] = space_glyph
;
2886 row
->used
[TEXT_AREA
] = i
;
2891 /**********************************************************************
2892 Mirroring operations on frame matrices in window matrices
2893 **********************************************************************/
2895 /* Set frame being updated via frame-based redisplay to F. This
2896 function must be called before updates to make explicit that we are
2897 working on frame matrices or not. */
2900 set_frame_matrix_frame (f
)
2903 frame_matrix_frame
= f
;
2907 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2908 DESIRED_MATRIX is the desired matrix corresponding to
2909 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2910 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2911 frame_matrix_frame is non-null, this indicates that the exchange is
2912 done in frame matrices, and that we have to perform analogous
2913 operations in window matrices of frame_matrix_frame. */
2916 make_current (desired_matrix
, current_matrix
, row
)
2917 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2920 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2921 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2922 int mouse_face_p
= current_row
->mouse_face_p
;
2924 /* Do current_row = desired_row. This exchanges glyph pointers
2925 between both rows, and does a structure assignment otherwise. */
2926 assign_row (current_row
, desired_row
);
2928 /* Enable current_row to mark it as valid. */
2929 current_row
->enabled_p
= 1;
2930 current_row
->mouse_face_p
= mouse_face_p
;
2932 /* If we are called on frame matrices, perform analogous operations
2933 for window matrices. */
2934 if (frame_matrix_frame
)
2935 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2939 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2940 W's frame which has been made current (by swapping pointers between
2941 current and desired matrix). Perform analogous operations in the
2942 matrices of leaf windows in the window tree rooted at W. */
2945 mirror_make_current (w
, frame_row
)
2951 if (!NILP (w
->hchild
))
2952 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2953 else if (!NILP (w
->vchild
))
2954 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2957 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2958 here because the checks performed in debug mode there
2959 will not allow the conversion. */
2960 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2962 /* If FRAME_ROW is within W, assign the desired row to the
2963 current row (exchanging glyph pointers). */
2964 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2966 struct glyph_row
*current_row
2967 = MATRIX_ROW (w
->current_matrix
, row
);
2968 struct glyph_row
*desired_row
2969 = MATRIX_ROW (w
->desired_matrix
, row
);
2971 if (desired_row
->enabled_p
)
2972 assign_row (current_row
, desired_row
);
2974 swap_glyph_pointers (desired_row
, current_row
);
2975 current_row
->enabled_p
= 1;
2979 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2984 /* Perform row dance after scrolling. We are working on the range of
2985 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2986 including) in MATRIX. COPY_FROM is a vector containing, for each
2987 row I in the range 0 <= I < NLINES, the index of the original line
2988 to move to I. This index is relative to the row range, i.e. 0 <=
2989 index < NLINES. RETAINED_P is a vector containing zero for each
2990 row 0 <= I < NLINES which is empty.
2992 This function is called from do_scrolling and do_direct_scrolling. */
2995 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2997 struct glyph_matrix
*matrix
;
2998 int unchanged_at_top
, nlines
;
3002 /* A copy of original rows. */
3003 struct glyph_row
*old_rows
;
3005 /* Rows to assign to. */
3006 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3010 /* Make a copy of the original rows. */
3011 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3012 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3014 /* Assign new rows, maybe clear lines. */
3015 for (i
= 0; i
< nlines
; ++i
)
3017 int enabled_before_p
= new_rows
[i
].enabled_p
;
3019 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3020 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3021 new_rows
[i
] = old_rows
[copy_from
[i
]];
3022 new_rows
[i
].enabled_p
= enabled_before_p
;
3024 /* RETAINED_P is zero for empty lines. */
3025 if (!retained_p
[copy_from
[i
]])
3026 new_rows
[i
].enabled_p
= 0;
3029 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3030 if (frame_matrix_frame
)
3031 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3032 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3036 /* Synchronize glyph pointers in the current matrix of window W with
3037 the current frame matrix. */
3040 sync_window_with_frame_matrix_rows (w
)
3043 struct frame
*f
= XFRAME (w
->frame
);
3044 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3045 int left
, right
, x
, width
;
3047 /* Preconditions: W must be a leaf window on a tty frame. */
3048 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3049 xassert (!FRAME_WINDOW_P (f
));
3051 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3052 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3053 x
= w
->current_matrix
->matrix_x
;
3054 width
= w
->current_matrix
->matrix_w
;
3056 window_row
= w
->current_matrix
->rows
;
3057 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3058 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3060 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3062 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3063 = frame_row
->glyphs
[0] + x
;
3064 window_row
->glyphs
[TEXT_AREA
]
3065 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3066 window_row
->glyphs
[LAST_AREA
]
3067 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3068 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3069 = window_row
->glyphs
[LAST_AREA
] - right
;
3074 /* Return the window in the window tree rooted in W containing frame
3075 row ROW. Value is null if none is found. */
3078 frame_row_to_window (w
, row
)
3082 struct window
*found
= NULL
;
3086 if (!NILP (w
->hchild
))
3087 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3088 else if (!NILP (w
->vchild
))
3089 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3090 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3091 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3094 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3101 /* Perform a line dance in the window tree rooted at W, after
3102 scrolling a frame matrix in mirrored_line_dance.
3104 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3105 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3106 COPY_FROM is a vector containing, for each row I in the range 0 <=
3107 I < NLINES, the index of the original line to move to I. This
3108 index is relative to the row range, i.e. 0 <= index < NLINES.
3109 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3113 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3115 int unchanged_at_top
, nlines
;
3121 if (!NILP (w
->hchild
))
3122 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3123 nlines
, copy_from
, retained_p
);
3124 else if (!NILP (w
->vchild
))
3125 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3126 nlines
, copy_from
, retained_p
);
3129 /* W is a leaf window, and we are working on its current
3131 struct glyph_matrix
*m
= w
->current_matrix
;
3133 struct glyph_row
*old_rows
;
3135 /* Make a copy of the original rows of matrix m. */
3136 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3137 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3139 for (i
= 0; i
< nlines
; ++i
)
3141 /* Frame relative line assigned to. */
3142 int frame_to
= i
+ unchanged_at_top
;
3144 /* Frame relative line assigned. */
3145 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3147 /* Window relative line assigned to. */
3148 int window_to
= frame_to
- m
->matrix_y
;
3150 /* Window relative line assigned. */
3151 int window_from
= frame_from
- m
->matrix_y
;
3153 /* Is assigned line inside window? */
3154 int from_inside_window_p
3155 = window_from
>= 0 && window_from
< m
->matrix_h
;
3157 /* Is assigned to line inside window? */
3158 int to_inside_window_p
3159 = window_to
>= 0 && window_to
< m
->matrix_h
;
3161 if (from_inside_window_p
&& to_inside_window_p
)
3163 /* Enabled setting before assignment. */
3164 int enabled_before_p
;
3166 /* Do the assignment. The enabled_p flag is saved
3167 over the assignment because the old redisplay did
3169 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3170 m
->rows
[window_to
] = old_rows
[window_from
];
3171 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3173 /* If frame line is empty, window line is empty, too. */
3174 if (!retained_p
[copy_from
[i
]])
3175 m
->rows
[window_to
].enabled_p
= 0;
3177 else if (to_inside_window_p
)
3179 /* A copy between windows. This is an infrequent
3180 case not worth optimizing. */
3181 struct frame
*f
= XFRAME (w
->frame
);
3182 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3184 struct glyph_matrix
*m2
;
3187 w2
= frame_row_to_window (root
, frame_from
);
3188 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3189 -nw', FROM_FRAME sometimes has no associated window.
3190 This check avoids a segfault if W2 is null. */
3193 m2
= w2
->current_matrix
;
3194 m2_from
= frame_from
- m2
->matrix_y
;
3195 copy_row_except_pointers (m
->rows
+ window_to
,
3196 m2
->rows
+ m2_from
);
3198 /* If frame line is empty, window line is empty, too. */
3199 if (!retained_p
[copy_from
[i
]])
3200 m
->rows
[window_to
].enabled_p
= 0;
3204 else if (from_inside_window_p
)
3208 /* If there was a copy between windows, make sure glyph
3209 pointers are in sync with the frame matrix. */
3211 sync_window_with_frame_matrix_rows (w
);
3213 /* Check that no pointers are lost. */
3217 /* Next window on same level. */
3218 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3225 /* Check that window and frame matrices agree about their
3226 understanding where glyphs of the rows are to find. For each
3227 window in the window tree rooted at W, check that rows in the
3228 matrices of leaf window agree with their frame matrices about
3232 check_window_matrix_pointers (w
)
3237 if (!NILP (w
->hchild
))
3238 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3239 else if (!NILP (w
->vchild
))
3240 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3243 struct frame
*f
= XFRAME (w
->frame
);
3244 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3245 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3248 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3253 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3254 a window and FRAME_MATRIX is the corresponding frame matrix. For
3255 each row in WINDOW_MATRIX check that it's a slice of the
3256 corresponding frame row. If it isn't, abort. */
3259 check_matrix_pointers (window_matrix
, frame_matrix
)
3260 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3262 /* Row number in WINDOW_MATRIX. */
3265 /* Row number corresponding to I in FRAME_MATRIX. */
3266 int j
= window_matrix
->matrix_y
;
3268 /* For all rows check that the row in the window matrix is a
3269 slice of the row in the frame matrix. If it isn't we didn't
3270 mirror an operation on the frame matrix correctly. */
3271 while (i
< window_matrix
->nrows
)
3273 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3274 frame_matrix
->rows
+ j
))
3280 #endif /* GLYPH_DEBUG != 0 */
3284 /**********************************************************************
3285 VPOS and HPOS translations
3286 **********************************************************************/
3290 /* Translate vertical position VPOS which is relative to window W to a
3291 vertical position relative to W's frame. */
3294 window_to_frame_vpos (w
, vpos
)
3298 struct frame
*f
= XFRAME (w
->frame
);
3300 xassert (!FRAME_WINDOW_P (f
));
3301 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3302 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3303 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3308 /* Translate horizontal position HPOS which is relative to window W to
3309 a horizontal position relative to W's frame. */
3312 window_to_frame_hpos (w
, hpos
)
3316 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3317 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3321 #endif /* GLYPH_DEBUG */
3325 /**********************************************************************
3327 **********************************************************************/
3329 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3330 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3336 CHECK_LIVE_FRAME (frame
);
3339 /* Ignore redraw requests, if frame has no glyphs yet.
3340 (Implementation note: It still has to be checked why we are
3341 called so early here). */
3342 if (!glyphs_initialized_initially_p
)
3347 if (FRAME_MSDOS_P (f
))
3348 set_terminal_modes (FRAME_DEVICE (f
));
3351 clear_current_matrices (f
);
3353 if (FRAME_TERMCAP_P (f
))
3354 fflush (FRAME_TTY (f
)->output
);
3355 windows_or_buffers_changed
++;
3356 /* Mark all windows as inaccurate, so that every window will have
3357 its redisplay done. */
3358 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3359 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3365 /* Redraw frame F. This is nothing more than a call to the Lisp
3366 function redraw-frame. */
3373 XSETFRAME (frame
, f
);
3374 Fredraw_frame (frame
);
3378 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3379 doc
: /* Clear and redisplay all visible frames. */)
3382 Lisp_Object tail
, frame
;
3384 FOR_EACH_FRAME (tail
, frame
)
3385 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3386 Fredraw_frame (frame
);
3392 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3393 visible frames marked as garbaged. */
3396 redraw_garbaged_frames ()
3398 Lisp_Object tail
, frame
;
3400 FOR_EACH_FRAME (tail
, frame
)
3401 if (FRAME_VISIBLE_P (XFRAME (frame
))
3402 && FRAME_GARBAGED_P (XFRAME (frame
)))
3403 Fredraw_frame (frame
);
3408 /***********************************************************************
3410 ***********************************************************************/
3412 /* Try to update display and current glyph matrix directly.
3414 This function is called after a character G has been inserted into
3415 current_buffer. It tries to update the current glyph matrix and
3416 perform appropriate screen output to reflect the insertion. If it
3417 succeeds, the global flag redisplay_performed_directly_p will be
3418 set to 1, and thereby prevent the more costly general redisplay
3419 from running (see redisplay_internal).
3421 This function is not called for `hairy' character insertions.
3422 In particular, it is not called when after or before change
3423 functions exist, like they are used by font-lock. See keyboard.c
3424 for details where this function is called. */
3427 direct_output_for_insert (g
)
3430 register struct frame
*f
= SELECTED_FRAME ();
3431 struct window
*w
= XWINDOW (selected_window
);
3433 struct glyph_row
*glyph_row
;
3434 struct glyph
*glyphs
, *glyph
, *end
;
3436 /* Non-null means that redisplay of W is based on window matrices. */
3437 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3438 /* Non-null means we are in overwrite mode. */
3439 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3441 struct text_pos pos
;
3442 int delta
, delta_bytes
;
3444 /* Not done directly. */
3445 redisplay_performed_directly_p
= 0;
3447 /* Quickly give up for some common cases. */
3448 if (cursor_in_echo_area
3449 /* Give up if fonts have changed. */
3451 /* Give up if face attributes have been changed. */
3452 || face_change_count
3453 /* Give up if cursor position not really known. */
3454 || !display_completed
3455 /* Give up if buffer appears in two places. */
3456 || buffer_shared
> 1
3457 /* Give up if currently displaying a message instead of the
3458 minibuffer contents. */
3459 || (EQ (selected_window
, minibuf_window
)
3460 && EQ (minibuf_window
, echo_area_window
))
3461 /* Give up for hscrolled mini-buffer because display of the prompt
3462 is handled specially there (see display_line). */
3463 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3464 /* Give up if overwriting in the middle of a line. */
3467 && FETCH_BYTE (PT
) != '\n')
3468 /* Give up for tabs and line ends. */
3472 /* Give up if unable to display the cursor in the window. */
3473 || w
->cursor
.vpos
< 0
3474 /* Give up if we are showing a message or just cleared the message
3475 because we might need to resize the echo area window. */
3476 || !NILP (echo_area_buffer
[0])
3477 || !NILP (echo_area_buffer
[1])
3478 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3479 /* Can't do it in a continued line because continuation
3480 lines would change. */
3481 (glyph_row
->continued_p
3482 || glyph_row
->exact_window_width_line_p
3483 /* Can't use this method if the line overlaps others or is
3484 overlapped by others because these other lines would
3485 have to be redisplayed. */
3486 || glyph_row
->overlapping_p
3487 || glyph_row
->overlapped_p
))
3488 /* Can't do it for partial width windows on terminal frames
3489 because we can't clear to eol in such a window. */
3490 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3493 /* If we can't insert glyphs, we can use this method only
3494 at the end of a line. */
3495 if (!FRAME_CHAR_INS_DEL_OK (f
))
3496 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3499 /* Set up a display iterator structure for W. Glyphs will be
3500 produced in scratch_glyph_row. Current position is W's cursor
3502 clear_glyph_row (&scratch_glyph_row
);
3503 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3504 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3505 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3508 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3509 if (glyph_row
->mouse_face_p
)
3512 /* Give up if highlighting trailing whitespace and we have trailing
3513 whitespace in glyph_row. We would have to remove the trailing
3514 whitespace face in that case. */
3515 if (!NILP (Vshow_trailing_whitespace
)
3516 && glyph_row
->used
[TEXT_AREA
])
3520 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3521 if (last
->type
== STRETCH_GLYPH
3522 || (last
->type
== CHAR_GLYPH
3523 && last
->u
.ch
== ' '))
3527 /* Give up if there are overlay strings at pos. This would fail
3528 if the overlay string has newlines in it. */
3529 if (STRINGP (it
.string
))
3532 it
.hpos
= w
->cursor
.hpos
;
3533 it
.vpos
= w
->cursor
.vpos
;
3534 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3535 it
.current_y
= w
->cursor
.y
;
3536 it
.end_charpos
= PT
;
3537 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3538 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3540 /* More than one display element may be returned for PT - 1 if
3541 (i) it's a control character which is translated into `\003' or
3542 `^C', or (ii) it has a display table entry, or (iii) it's a
3543 combination of both. */
3544 delta
= delta_bytes
= 0;
3545 while (get_next_display_element (&it
))
3547 PRODUCE_GLYPHS (&it
);
3549 /* Give up if glyph doesn't fit completely on the line. */
3550 if (it
.current_x
>= it
.last_visible_x
)
3553 /* Give up if new glyph has different ascent or descent than
3554 the original row, or if it is not a character glyph. */
3555 if (glyph_row
->ascent
!= it
.ascent
3556 || glyph_row
->height
!= it
.ascent
+ it
.descent
3557 || glyph_row
->phys_ascent
!= it
.phys_ascent
3558 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3559 || it
.what
!= IT_CHARACTER
)
3563 delta_bytes
+= it
.len
;
3564 set_iterator_to_next (&it
, 1);
3567 /* Give up if we hit the right edge of the window. We would have
3568 to insert truncation or continuation glyphs. */
3569 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3570 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3573 /* Give up if there is a \t following in the line. */
3575 it2
.end_charpos
= ZV
;
3576 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3577 while (get_next_display_element (&it2
)
3578 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3582 set_iterator_to_next (&it2
, 1);
3585 /* Number of new glyphs produced. */
3586 n
= it
.glyph_row
->used
[TEXT_AREA
];
3588 /* Start and end of glyphs in original row. */
3589 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3590 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3592 /* Make room for new glyphs, then insert them. */
3593 xassert (end
- glyphs
- n
>= 0);
3594 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3595 (end
- glyphs
- n
) * sizeof (*end
));
3596 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3597 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3598 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3600 /* Compute new line width. */
3601 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3602 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3603 glyph_row
->pixel_width
= glyph_row
->x
;
3606 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3610 /* Increment buffer positions for glyphs following the newly
3612 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3613 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3614 glyph
->charpos
+= delta
;
3616 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3618 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3619 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3622 /* Adjust positions in lines following the one we are in. */
3623 increment_matrix_positions (w
->current_matrix
,
3625 w
->current_matrix
->nrows
,
3626 delta
, delta_bytes
);
3628 glyph_row
->contains_overlapping_glyphs_p
3629 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3631 glyph_row
->displays_text_p
= 1;
3632 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3633 XFASTINT (w
->window_end_vpos
)));
3635 if (!NILP (Vshow_trailing_whitespace
))
3636 highlight_trailing_whitespace (it
.f
, glyph_row
);
3638 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3639 In the middle, we have to insert glyphs. Note that this is now
3640 implemented for X frames. The implementation uses updated_window
3642 updated_row
= glyph_row
;
3643 updated_area
= TEXT_AREA
;
3647 FRAME_RIF (f
)->update_window_begin_hook (w
);
3649 if (glyphs
== end
- n
3650 /* In front of a space added by append_space. */
3651 || (glyphs
== end
- n
- 1
3652 && (end
- n
)->charpos
<= 0))
3653 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3655 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3659 if (glyphs
== end
- n
)
3660 write_glyphs (f
, glyphs
, n
);
3662 insert_glyphs (f
, glyphs
, n
);
3665 w
->cursor
.hpos
+= n
;
3666 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3667 xassert (w
->cursor
.hpos
>= 0
3668 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3670 /* How to set the cursor differs depending on whether we are
3671 using a frame matrix or a window matrix. Note that when
3672 a frame matrix is used, cursor_to expects frame coordinates,
3673 and the X and Y parameters are not used. */
3674 if (window_redisplay_p
)
3675 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3676 w
->cursor
.y
, w
->cursor
.x
);
3680 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3681 + (INTEGERP (w
->left_margin_cols
)
3682 ? XFASTINT (w
->left_margin_cols
)
3684 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3685 cursor_to (f
, y
, x
);
3688 #ifdef HAVE_WINDOW_SYSTEM
3689 update_window_fringes (w
, 0);
3693 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3696 if (FRAME_TERMCAP_P (f
))
3697 fflush (FRAME_TTY (f
)->output
);
3699 TRACE ((stderr
, "direct output for insert\n"));
3700 mark_window_display_accurate (it
.window
, 1);
3701 redisplay_performed_directly_p
= 1;
3706 /* Perform a direct display update for moving PT by N positions
3707 left or right. N < 0 means a movement backwards. This function
3708 is currently only called for N == 1 or N == -1. */
3711 direct_output_forward_char (n
)
3714 struct frame
*f
= SELECTED_FRAME ();
3715 struct window
*w
= XWINDOW (selected_window
);
3716 struct glyph_row
*row
;
3718 /* Give up if point moved out of or into a composition. */
3719 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3720 current_buffer
, PT
))
3723 /* Give up if face attributes have been changed. */
3724 if (face_change_count
)
3727 /* Give up if current matrix is not up to date or we are
3728 displaying a message. */
3729 if (!display_completed
|| cursor_in_echo_area
)
3732 /* Give up if the buffer's direction is reversed. */
3733 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3736 /* Can't use direct output if highlighting a region. */
3737 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3740 /* Can't use direct output if highlighting trailing whitespace. */
3741 if (!NILP (Vshow_trailing_whitespace
))
3744 /* Give up if we are showing a message or just cleared the message
3745 because we might need to resize the echo area window. */
3746 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3749 /* Give up if currently displaying a message instead of the
3750 minibuffer contents. */
3751 if (XWINDOW (minibuf_window
) == w
3752 && EQ (minibuf_window
, echo_area_window
))
3755 /* Give up if we don't know where the cursor is. */
3756 if (w
->cursor
.vpos
< 0)
3759 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3761 /* Give up if PT is outside of the last known cursor row. */
3762 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3763 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3766 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3768 w
->last_cursor
= w
->cursor
;
3769 XSETFASTINT (w
->last_point
, PT
);
3771 xassert (w
->cursor
.hpos
>= 0
3772 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3774 if (FRAME_WINDOW_P (f
))
3775 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3776 w
->cursor
.y
, w
->cursor
.x
);
3780 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3781 + (INTEGERP (w
->left_margin_cols
)
3782 ? XFASTINT (w
->left_margin_cols
)
3784 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3785 cursor_to (f
, y
, x
);
3788 if (FRAME_TERMCAP_P (f
))
3789 fflush (FRAME_TTY (f
)->output
);
3790 redisplay_performed_directly_p
= 1;
3796 /***********************************************************************
3798 ***********************************************************************/
3800 /* Update frame F based on the data in desired matrices.
3802 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3803 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3806 Value is non-zero if redisplay was stopped due to pending input. */
3809 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3812 int inhibit_hairy_id_p
;
3814 /* 1 means display has been paused because of pending input. */
3816 struct window
*root_window
= XWINDOW (f
->root_window
);
3818 if (FRAME_WINDOW_P (f
))
3820 /* We are working on window matrix basis. All windows whose
3821 flag must_be_updated_p is set have to be updated. */
3823 /* Record that we are not working on frame matrices. */
3824 set_frame_matrix_frame (NULL
);
3826 /* Update all windows in the window tree of F, maybe stopping
3827 when pending input is detected. */
3830 /* Update the menu bar on X frames that don't have toolkit
3832 if (WINDOWP (f
->menu_bar_window
))
3833 update_window (XWINDOW (f
->menu_bar_window
), 1);
3835 /* Update the tool-bar window, if present. */
3836 if (WINDOWP (f
->tool_bar_window
))
3838 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3840 /* Update tool-bar window. */
3841 if (w
->must_be_updated_p
)
3845 update_window (w
, 1);
3846 w
->must_be_updated_p
= 0;
3848 /* Swap tool-bar strings. We swap because we want to
3850 tem
= f
->current_tool_bar_string
;
3851 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3852 f
->desired_tool_bar_string
= tem
;
3857 /* Update windows. */
3858 paused_p
= update_window_tree (root_window
, force_p
);
3861 /* This flush is a performance bottleneck under X,
3862 and it doesn't seem to be necessary anyway (in general).
3863 It is necessary when resizing the window with the mouse, or
3864 at least the fringes are not redrawn in a timely manner. ++kfs */
3865 if (f
->force_flush_display_p
)
3867 FRAME_RIF (f
)->flush_display (f
);
3868 f
->force_flush_display_p
= 0;
3873 /* We are working on frame matrix basis. Set the frame on whose
3874 frame matrix we operate. */
3875 set_frame_matrix_frame (f
);
3877 /* Build F's desired matrix from window matrices. */
3878 build_frame_matrix (f
);
3880 /* Update the display */
3882 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3885 if (FRAME_TERMCAP_P (f
))
3887 if (FRAME_TTY (f
)->termscript
)
3888 fflush (FRAME_TTY (f
)->termscript
);
3889 fflush (FRAME_TTY (f
)->output
);
3892 /* Check window matrices for lost pointers. */
3894 check_window_matrix_pointers (root_window
);
3895 add_frame_display_history (f
, paused_p
);
3899 /* Reset flags indicating that a window should be updated. */
3900 set_window_update_flags (root_window
, 0);
3902 display_completed
= !paused_p
;
3908 /************************************************************************
3909 Window-based updates
3910 ************************************************************************/
3912 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3913 don't stop updating when input is pending. */
3916 update_window_tree (w
, force_p
)
3922 while (w
&& !paused_p
)
3924 if (!NILP (w
->hchild
))
3925 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3926 else if (!NILP (w
->vchild
))
3927 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3928 else if (w
->must_be_updated_p
)
3929 paused_p
|= update_window (w
, force_p
);
3931 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3938 /* Update window W if its flag must_be_updated_p is non-zero. If
3939 FORCE_P is non-zero, don't stop updating if input is pending. */
3942 update_single_window (w
, force_p
)
3946 if (w
->must_be_updated_p
)
3948 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3950 /* Record that this is not a frame-based redisplay. */
3951 set_frame_matrix_frame (NULL
);
3955 update_window (w
, force_p
);
3958 /* Reset flag in W. */
3959 w
->must_be_updated_p
= 0;
3963 #ifdef HAVE_WINDOW_SYSTEM
3965 /* Redraw lines from the current matrix of window W that are
3966 overlapped by other rows. YB is bottom-most y-position in W. */
3969 redraw_overlapped_rows (w
, yb
)
3974 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3976 /* If rows overlapping others have been changed, the rows being
3977 overlapped have to be redrawn. This won't draw lines that have
3978 already been drawn in update_window_line because overlapped_p in
3979 desired rows is 0, so after row assignment overlapped_p in
3980 current rows is 0. */
3981 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3983 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3985 if (!row
->enabled_p
)
3987 else if (row
->mode_line_p
)
3990 if (row
->overlapped_p
)
3992 enum glyph_row_area area
;
3994 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3997 updated_area
= area
;
3998 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3999 area
== TEXT_AREA
? row
->x
: 0);
4000 if (row
->used
[area
])
4001 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4003 FRAME_RIF (f
)->clear_end_of_line (-1);
4006 row
->overlapped_p
= 0;
4009 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4015 /* Redraw lines from the current matrix of window W that overlap
4016 others. YB is bottom-most y-position in W. */
4019 redraw_overlapping_rows (w
, yb
)
4024 struct glyph_row
*row
;
4025 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4027 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4029 row
= w
->current_matrix
->rows
+ i
;
4031 if (!row
->enabled_p
)
4033 else if (row
->mode_line_p
)
4036 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4038 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4042 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4043 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4044 overlaps
|= OVERLAPS_PRED
;
4045 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4046 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4047 overlaps
|= OVERLAPS_SUCC
;
4051 if (row
->used
[LEFT_MARGIN_AREA
])
4052 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4054 if (row
->used
[TEXT_AREA
])
4055 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4057 if (row
->used
[RIGHT_MARGIN_AREA
])
4058 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4060 /* Record in neighbour rows that ROW overwrites part of
4062 if (overlaps
& OVERLAPS_PRED
)
4063 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4064 if (overlaps
& OVERLAPS_SUCC
)
4065 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4074 #endif /* HAVE_WINDOW_SYSTEM */
4079 /* Check that no row in the current matrix of window W is enabled
4080 which is below what's displayed in the window. */
4083 check_current_matrix_flags (w
)
4086 int last_seen_p
= 0;
4087 int i
, yb
= window_text_bottom_y (w
);
4089 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4091 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4092 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4094 else if (last_seen_p
&& row
->enabled_p
)
4099 #endif /* GLYPH_DEBUG */
4102 /* Update display of window W. FORCE_P non-zero means that we should
4103 not stop when detecting pending input. */
4106 update_window (w
, force_p
)
4110 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4112 int preempt_count
= baud_rate
/ 2400 + 1;
4113 extern int input_pending
;
4114 extern Lisp_Object do_mouse_tracking
;
4115 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4117 /* Check that W's frame doesn't have glyph matrices. */
4118 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4121 /* Check pending input the first time so that we can quickly return. */
4122 if (redisplay_dont_pause
)
4125 detect_input_pending_ignore_squeezables ();
4127 /* If forced to complete the update, or if no input is pending, do
4129 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4131 struct glyph_row
*row
, *end
;
4132 struct glyph_row
*mode_line_row
;
4133 struct glyph_row
*header_line_row
;
4134 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4136 rif
->update_window_begin_hook (w
);
4137 yb
= window_text_bottom_y (w
);
4139 /* If window has a header line, update it before everything else.
4140 Adjust y-positions of other rows by the header line height. */
4141 row
= desired_matrix
->rows
;
4142 end
= row
+ desired_matrix
->nrows
- 1;
4144 if (row
->mode_line_p
)
4146 header_line_row
= row
;
4150 header_line_row
= NULL
;
4152 /* Update the mode line, if necessary. */
4153 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4154 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4156 mode_line_row
->y
= yb
;
4157 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4159 &mouse_face_overwritten_p
);
4163 /* Find first enabled row. Optimizations in redisplay_internal
4164 may lead to an update with only one row enabled. There may
4165 be also completely empty matrices. */
4166 while (row
< end
&& !row
->enabled_p
)
4169 /* Try reusing part of the display by copying. */
4170 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4172 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4175 /* All rows were found to be equal. */
4181 /* We've scrolled the display. */
4187 /* Update the rest of the lines. */
4188 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4191 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4194 /* We'll have to play a little bit with when to
4195 detect_input_pending. If it's done too often,
4196 scrolling large windows with repeated scroll-up
4197 commands will too quickly pause redisplay. */
4198 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4199 detect_input_pending_ignore_squeezables ();
4201 changed_p
|= update_window_line (w
, vpos
,
4202 &mouse_face_overwritten_p
);
4204 /* Mark all rows below the last visible one in the current
4205 matrix as invalid. This is necessary because of
4206 variable line heights. Consider the case of three
4207 successive redisplays, where the first displays 5
4208 lines, the second 3 lines, and the third 5 lines again.
4209 If the second redisplay wouldn't mark rows in the
4210 current matrix invalid, the third redisplay might be
4211 tempted to optimize redisplay based on lines displayed
4212 in the first redisplay. */
4213 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4214 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4215 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4218 /* Was display preempted? */
4219 paused_p
= row
< end
;
4223 /* Update the header line after scrolling because a new header
4224 line would otherwise overwrite lines at the top of the window
4225 that can be scrolled. */
4226 if (header_line_row
&& header_line_row
->enabled_p
)
4228 header_line_row
->y
= 0;
4229 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4233 /* Fix the appearance of overlapping/overlapped rows. */
4234 if (!paused_p
&& !w
->pseudo_window_p
)
4236 #ifdef HAVE_WINDOW_SYSTEM
4237 if (changed_p
&& rif
->fix_overlapping_area
)
4239 redraw_overlapped_rows (w
, yb
);
4240 redraw_overlapping_rows (w
, yb
);
4244 /* Make cursor visible at cursor position of W. */
4245 set_window_cursor_after_update (w
);
4247 #if 0 /* Check that current matrix invariants are satisfied. This is
4248 for debugging only. See the comment of check_matrix_invariants. */
4249 IF_DEBUG (check_matrix_invariants (w
));
4254 /* Remember the redisplay method used to display the matrix. */
4255 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4258 #ifdef HAVE_WINDOW_SYSTEM
4259 update_window_fringes (w
, 0);
4262 /* End the update of window W. Don't set the cursor if we
4263 paused updating the display because in this case,
4264 set_window_cursor_after_update hasn't been called, and
4265 output_cursor doesn't contain the cursor location. */
4266 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4272 /* check_current_matrix_flags (w); */
4273 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4276 clear_glyph_matrix (desired_matrix
);
4282 /* Update the display of area AREA in window W, row number VPOS.
4283 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4286 update_marginal_area (w
, area
, vpos
)
4290 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4291 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4293 /* Let functions in xterm.c know what area subsequent X positions
4294 will be relative to. */
4295 updated_area
= area
;
4297 /* Set cursor to start of glyphs, write them, and clear to the end
4298 of the area. I don't think that something more sophisticated is
4299 necessary here, since marginal areas will not be the default. */
4300 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4301 if (desired_row
->used
[area
])
4302 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4303 rif
->clear_end_of_line (-1);
4307 /* Update the display of the text area of row VPOS in window W.
4308 Value is non-zero if display has changed. */
4311 update_text_area (w
, vpos
)
4315 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4316 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4317 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4320 /* Let functions in xterm.c know what area subsequent X positions
4321 will be relative to. */
4322 updated_area
= TEXT_AREA
;
4324 /* If rows are at different X or Y, or rows have different height,
4325 or the current row is marked invalid, write the entire line. */
4326 if (!current_row
->enabled_p
4327 || desired_row
->y
!= current_row
->y
4328 || desired_row
->ascent
!= current_row
->ascent
4329 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4330 || desired_row
->phys_height
!= current_row
->phys_height
4331 || desired_row
->visible_height
!= current_row
->visible_height
4332 || current_row
->overlapped_p
4333 || current_row
->mouse_face_p
4334 || current_row
->x
!= desired_row
->x
)
4336 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4338 if (desired_row
->used
[TEXT_AREA
])
4339 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4340 desired_row
->used
[TEXT_AREA
]);
4342 /* Clear to end of window. */
4343 rif
->clear_end_of_line (-1);
4346 /* This erases the cursor. We do this here because
4347 notice_overwritten_cursor cannot easily check this, which
4348 might indicate that the whole functionality of
4349 notice_overwritten_cursor would better be implemented here.
4350 On the other hand, we need notice_overwritten_cursor as long
4351 as mouse highlighting is done asynchronously outside of
4353 if (vpos
== w
->phys_cursor
.vpos
)
4354 w
->phys_cursor_on_p
= 0;
4359 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4360 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4361 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4362 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4364 /* If the desired row extends its face to the text area end,
4365 make sure we write at least one glyph, so that the face
4366 extension actually takes place. */
4367 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4370 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4374 /* Loop over glyphs that current and desired row may have
4380 /* Skip over glyphs that both rows have in common. These
4381 don't have to be written. We can't skip if the last
4382 current glyph overlaps the glyph to its right. For
4383 example, consider a current row of `if ' with the `f' in
4384 Courier bold so that it overlaps the ` ' to its right.
4385 If the desired row is ` ', we would skip over the space
4386 after the `if' and there would remain a pixel from the
4387 `f' on the screen. */
4388 if (overlapping_glyphs_p
&& i
> 0)
4390 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4393 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4395 can_skip_p
= right
== 0;
4401 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4403 x
+= desired_glyph
->pixel_width
;
4404 ++desired_glyph
, ++current_glyph
, ++i
;
4407 /* Consider the case that the current row contains "xxx
4408 ppp ggg" in italic Courier font, and the desired row
4409 is "xxx ggg". The character `p' has lbearing, `g'
4410 has not. The loop above will stop in front of the
4411 first `p' in the current row. If we would start
4412 writing glyphs there, we wouldn't erase the lbearing
4413 of the `p'. The rest of the lbearing problem is then
4414 taken care of by draw_glyphs. */
4415 if (overlapping_glyphs_p
4417 && i
< current_row
->used
[TEXT_AREA
]
4418 && (current_row
->used
[TEXT_AREA
]
4419 != desired_row
->used
[TEXT_AREA
]))
4423 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4425 while (left
> 0 && i
> 0)
4427 --i
, --desired_glyph
, --current_glyph
;
4428 x
-= desired_glyph
->pixel_width
;
4429 left
-= desired_glyph
->pixel_width
;
4434 /* Try to avoid writing the entire rest of the desired row
4435 by looking for a resync point. This mainly prevents
4436 mode line flickering in the case the mode line is in
4437 fixed-pitch font, which it usually will be. */
4438 if (i
< desired_row
->used
[TEXT_AREA
])
4440 int start_x
= x
, start_hpos
= i
;
4441 struct glyph
*start
= desired_glyph
;
4443 int skip_first_p
= !can_skip_p
;
4445 /* Find the next glyph that's equal again. */
4448 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4451 x
+= desired_glyph
->pixel_width
;
4452 current_x
+= current_glyph
->pixel_width
;
4453 ++desired_glyph
, ++current_glyph
, ++i
;
4457 if (i
== start_hpos
|| x
!= current_x
)
4461 desired_glyph
= start
;
4465 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4466 rif
->write_glyphs (start
, i
- start_hpos
);
4471 /* Write the rest. */
4472 if (i
< desired_row
->used
[TEXT_AREA
])
4474 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4475 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4479 /* Maybe clear to end of line. */
4480 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4482 /* If new row extends to the end of the text area, nothing
4483 has to be cleared, if and only if we did a write_glyphs
4484 above. This is made sure by setting desired_stop_pos
4485 appropriately above. */
4486 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4488 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4490 /* If old row extends to the end of the text area, clear. */
4491 if (i
>= desired_row
->used
[TEXT_AREA
])
4492 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4493 desired_row
->pixel_width
);
4494 rif
->clear_end_of_line (-1);
4497 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4499 /* Otherwise clear to the end of the old row. Everything
4500 after that position should be clear already. */
4503 if (i
>= desired_row
->used
[TEXT_AREA
])
4504 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4505 desired_row
->pixel_width
);
4507 /* If cursor is displayed at the end of the line, make sure
4508 it's cleared. Nowadays we don't have a phys_cursor_glyph
4509 with which to erase the cursor (because this method
4510 doesn't work with lbearing/rbearing), so we must do it
4512 if (vpos
== w
->phys_cursor
.vpos
4513 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4515 w
->phys_cursor_on_p
= 0;
4519 x
= current_row
->pixel_width
;
4520 rif
->clear_end_of_line (x
);
4529 /* Update row VPOS in window W. Value is non-zero if display has been
4533 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4535 int vpos
, *mouse_face_overwritten_p
;
4537 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4538 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4539 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4542 /* Set the row being updated. This is important to let xterm.c
4543 know what line height values are in effect. */
4544 updated_row
= desired_row
;
4546 /* A row can be completely invisible in case a desired matrix was
4547 built with a vscroll and then make_cursor_line_fully_visible shifts
4548 the matrix. Make sure to make such rows current anyway, since
4549 we need the correct y-position, for example, in the current matrix. */
4550 if (desired_row
->mode_line_p
4551 || desired_row
->visible_height
> 0)
4553 xassert (desired_row
->enabled_p
);
4555 /* Update display of the left margin area, if there is one. */
4556 if (!desired_row
->full_width_p
4557 && !NILP (w
->left_margin_cols
))
4560 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4563 /* Update the display of the text area. */
4564 if (update_text_area (w
, vpos
))
4567 if (current_row
->mouse_face_p
)
4568 *mouse_face_overwritten_p
= 1;
4571 /* Update display of the right margin area, if there is one. */
4572 if (!desired_row
->full_width_p
4573 && !NILP (w
->right_margin_cols
))
4576 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4579 /* Draw truncation marks etc. */
4580 if (!current_row
->enabled_p
4581 || desired_row
->y
!= current_row
->y
4582 || desired_row
->visible_height
!= current_row
->visible_height
4583 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4584 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4585 || current_row
->redraw_fringe_bitmaps_p
4586 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4587 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4588 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4589 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4590 rif
->after_update_window_line_hook (desired_row
);
4593 /* Update current_row from desired_row. */
4594 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4600 /* Set the cursor after an update of window W. This function may only
4601 be called from update_window. */
4604 set_window_cursor_after_update (w
)
4607 struct frame
*f
= XFRAME (w
->frame
);
4608 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4609 int cx
, cy
, vpos
, hpos
;
4611 /* Not intended for frame matrix updates. */
4612 xassert (FRAME_WINDOW_P (f
));
4614 if (cursor_in_echo_area
4615 && !NILP (echo_area_buffer
[0])
4616 /* If we are showing a message instead of the mini-buffer,
4617 show the cursor for the message instead. */
4618 && XWINDOW (minibuf_window
) == w
4619 && EQ (minibuf_window
, echo_area_window
)
4620 /* These cases apply only to the frame that contains
4621 the active mini-buffer window. */
4622 && FRAME_HAS_MINIBUF_P (f
)
4623 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4625 cx
= cy
= vpos
= hpos
= 0;
4627 if (cursor_in_echo_area
>= 0)
4629 /* If the mini-buffer is several lines high, find the last
4630 line that has any text on it. Note: either all lines
4631 are enabled or none. Otherwise we wouldn't be able to
4633 struct glyph_row
*row
, *last_row
;
4634 struct glyph
*glyph
;
4635 int yb
= window_text_bottom_y (w
);
4638 row
= w
->current_matrix
->rows
;
4639 while (row
->enabled_p
4640 && (last_row
== NULL
4641 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4643 if (row
->used
[TEXT_AREA
]
4644 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4651 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4652 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4654 while (last
> start
&& last
->charpos
< 0)
4657 for (glyph
= start
; glyph
< last
; ++glyph
)
4659 cx
+= glyph
->pixel_width
;
4664 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4672 hpos
= w
->cursor
.hpos
;
4673 vpos
= w
->cursor
.vpos
;
4676 /* Window cursor can be out of sync for horizontally split windows. */
4677 hpos
= max (0, hpos
);
4678 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4679 vpos
= max (0, vpos
);
4680 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4681 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4685 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4686 tree rooted at W. */
4689 set_window_update_flags (w
, on_p
)
4695 if (!NILP (w
->hchild
))
4696 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4697 else if (!NILP (w
->vchild
))
4698 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4700 w
->must_be_updated_p
= on_p
;
4702 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4708 /***********************************************************************
4709 Window-Based Scrolling
4710 ***********************************************************************/
4712 /* Structure describing rows in scrolling_window. */
4716 /* Number of occurrences of this row in desired and current matrix. */
4717 int old_uses
, new_uses
;
4719 /* Vpos of row in new matrix. */
4720 int new_line_number
;
4722 /* Bucket index of this row_entry in the hash table row_table. */
4725 /* The row described by this entry. */
4726 struct glyph_row
*row
;
4728 /* Hash collision chain. */
4729 struct row_entry
*next
;
4732 /* A pool to allocate row_entry structures from, and the size of the
4733 pool. The pool is reallocated in scrolling_window when we find
4734 that we need a larger one. */
4736 static struct row_entry
*row_entry_pool
;
4737 static int row_entry_pool_size
;
4739 /* Index of next free entry in row_entry_pool. */
4741 static int row_entry_idx
;
4743 /* The hash table used during scrolling, and the table's size. This
4744 table is used to quickly identify equal rows in the desired and
4747 static struct row_entry
**row_table
;
4748 static int row_table_size
;
4750 /* Vectors of pointers to row_entry structures belonging to the
4751 current and desired matrix, and the size of the vectors. */
4753 static struct row_entry
**old_lines
, **new_lines
;
4754 static int old_lines_size
, new_lines_size
;
4756 /* A pool to allocate run structures from, and its size. */
4758 static struct run
*run_pool
;
4759 static int runs_size
;
4761 /* A vector of runs of lines found during scrolling. */
4763 static struct run
**runs
;
4765 /* Add glyph row ROW to the scrolling hash table during the scrolling
4768 static INLINE
struct row_entry
*
4769 add_row_entry (w
, row
)
4771 struct glyph_row
*row
;
4773 struct row_entry
*entry
;
4774 int i
= row
->hash
% row_table_size
;
4776 entry
= row_table
[i
];
4777 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4778 entry
= entry
->next
;
4782 entry
= row_entry_pool
+ row_entry_idx
++;
4784 entry
->old_uses
= entry
->new_uses
= 0;
4785 entry
->new_line_number
= 0;
4787 entry
->next
= row_table
[i
];
4788 row_table
[i
] = entry
;
4795 /* Try to reuse part of the current display of W by scrolling lines.
4796 HEADER_LINE_P non-zero means W has a header line.
4798 The algorithm is taken from Communications of the ACM, Apr78 "A
4799 Technique for Isolating Differences Between Files." It should take
4802 A short outline of the steps of the algorithm
4804 1. Skip lines equal at the start and end of both matrices.
4806 2. Enter rows in the current and desired matrix into a symbol
4807 table, counting how often they appear in both matrices.
4809 3. Rows that appear exactly once in both matrices serve as anchors,
4810 i.e. we assume that such lines are likely to have been moved.
4812 4. Starting from anchor lines, extend regions to be scrolled both
4813 forward and backward.
4817 -1 if all rows were found to be equal.
4818 0 to indicate that we did not scroll the display, or
4819 1 if we did scroll. */
4822 scrolling_window (w
, header_line_p
)
4826 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4827 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4828 int yb
= window_text_bottom_y (w
);
4829 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4830 int nruns
, nbytes
, n
, run_idx
;
4831 struct row_entry
*entry
;
4832 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4834 /* Skip over rows equal at the start. */
4835 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4837 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4838 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4842 && !d
->redraw_fringe_bitmaps_p
4844 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4845 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4846 && row_equal_p (w
, c
, d
, 1))
4855 /* Give up if some rows in the desired matrix are not enabled. */
4856 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4859 first_old
= first_new
= i
;
4861 /* Set last_new to the index + 1 of the last enabled row in the
4864 while (i
< desired_matrix
->nrows
- 1
4865 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4866 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4869 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4874 /* Set last_old to the index + 1 of the last enabled row in the
4875 current matrix. We don't look at the enabled flag here because
4876 we plan to reuse part of the display even if other parts are
4879 while (i
< current_matrix
->nrows
- 1)
4881 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4890 /* Skip over rows equal at the bottom. */
4893 while (i
- 1 > first_new
4894 && j
- 1 > first_old
4895 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4896 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4897 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4898 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4900 MATRIX_ROW (desired_matrix
, i
- 1),
4901 MATRIX_ROW (current_matrix
, j
- 1), 1))
4906 /* Nothing to do if all rows are equal. */
4907 if (last_new
== first_new
)
4910 /* Reallocate vectors, tables etc. if necessary. */
4912 if (current_matrix
->nrows
> old_lines_size
)
4914 old_lines_size
= current_matrix
->nrows
;
4915 nbytes
= old_lines_size
* sizeof *old_lines
;
4916 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4919 if (desired_matrix
->nrows
> new_lines_size
)
4921 new_lines_size
= desired_matrix
->nrows
;
4922 nbytes
= new_lines_size
* sizeof *new_lines
;
4923 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4926 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4927 if (3 * n
> row_table_size
)
4929 row_table_size
= next_almost_prime (3 * n
);
4930 nbytes
= row_table_size
* sizeof *row_table
;
4931 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4932 bzero (row_table
, nbytes
);
4935 if (n
> row_entry_pool_size
)
4937 row_entry_pool_size
= n
;
4938 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4939 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4942 if (desired_matrix
->nrows
> runs_size
)
4944 runs_size
= desired_matrix
->nrows
;
4945 nbytes
= runs_size
* sizeof *runs
;
4946 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4947 nbytes
= runs_size
* sizeof *run_pool
;
4948 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4951 nruns
= run_idx
= 0;
4954 /* Add rows from the current and desired matrix to the hash table
4955 row_hash_table to be able to find equal ones quickly. */
4957 for (i
= first_old
; i
< last_old
; ++i
)
4959 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4961 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4962 old_lines
[i
] = entry
;
4966 old_lines
[i
] = NULL
;
4969 for (i
= first_new
; i
< last_new
; ++i
)
4971 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4972 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4974 entry
->new_line_number
= i
;
4975 new_lines
[i
] = entry
;
4978 /* Identify moves based on lines that are unique and equal
4979 in both matrices. */
4980 for (i
= first_old
; i
< last_old
;)
4982 && old_lines
[i
]->old_uses
== 1
4983 && old_lines
[i
]->new_uses
== 1)
4986 int new_line
= old_lines
[i
]->new_line_number
;
4987 struct run
*run
= run_pool
+ run_idx
++;
4990 run
->current_vpos
= i
;
4991 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4992 run
->desired_vpos
= new_line
;
4993 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4995 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4997 /* Extend backward. */
5000 while (j
> first_old
5002 && old_lines
[j
] == new_lines
[k
])
5004 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5005 --run
->current_vpos
;
5006 --run
->desired_vpos
;
5009 run
->desired_y
-= h
;
5010 run
->current_y
-= h
;
5014 /* Extend forward. */
5019 && old_lines
[j
] == new_lines
[k
])
5021 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5027 /* Insert run into list of all runs. Order runs by copied
5028 pixel lines. Note that we record runs that don't have to
5029 be copied because they are already in place. This is done
5030 because we can avoid calling update_window_line in this
5032 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5034 for (k
= nruns
; k
> j
; --k
)
5035 runs
[k
] = runs
[k
- 1];
5044 /* Do the moves. Do it in a way that we don't overwrite something
5045 we want to copy later on. This is not solvable in general
5046 because there is only one display and we don't have a way to
5047 exchange areas on this display. Example:
5049 +-----------+ +-----------+
5051 +-----------+ --> +-----------+
5053 +-----------+ +-----------+
5055 Instead, prefer bigger moves, and invalidate moves that would
5056 copy from where we copied to. */
5058 for (i
= 0; i
< nruns
; ++i
)
5059 if (runs
[i
]->nrows
> 0)
5061 struct run
*r
= runs
[i
];
5063 /* Copy on the display. */
5064 if (r
->current_y
!= r
->desired_y
)
5066 rif
->scroll_run_hook (w
, r
);
5068 /* Invalidate runs that copy from where we copied to. */
5069 for (j
= i
+ 1; j
< nruns
; ++j
)
5071 struct run
*p
= runs
[j
];
5073 if ((p
->current_y
>= r
->desired_y
5074 && p
->current_y
< r
->desired_y
+ r
->height
)
5075 || (p
->current_y
+ p
->height
>= r
->desired_y
5076 && (p
->current_y
+ p
->height
5077 < r
->desired_y
+ r
->height
)))
5082 /* Assign matrix rows. */
5083 for (j
= 0; j
< r
->nrows
; ++j
)
5085 struct glyph_row
*from
, *to
;
5086 int to_overlapped_p
;
5088 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5089 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5090 to_overlapped_p
= to
->overlapped_p
;
5091 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5092 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5093 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5094 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5095 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5096 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5097 from
->redraw_fringe_bitmaps_p
= 1;
5098 assign_row (to
, from
);
5099 to
->enabled_p
= 1, from
->enabled_p
= 0;
5100 to
->overlapped_p
= to_overlapped_p
;
5104 /* Clear the hash table, for the next time. */
5105 for (i
= 0; i
< row_entry_idx
; ++i
)
5106 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5108 /* Value is > 0 to indicate that we scrolled the display. */
5114 /************************************************************************
5116 ************************************************************************/
5118 /* Update the desired frame matrix of frame F.
5120 FORCE_P non-zero means that the update should not be stopped by
5121 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5122 should not be tried.
5124 Value is non-zero if update was stopped due to pending input. */
5127 update_frame_1 (f
, force_p
, inhibit_id_p
)
5132 /* Frame matrices to work on. */
5133 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5134 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5137 int preempt_count
= baud_rate
/ 2400 + 1;
5138 extern int input_pending
;
5140 xassert (current_matrix
&& desired_matrix
);
5142 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5143 calculate_costs (f
);
5145 if (preempt_count
<= 0)
5148 if (redisplay_dont_pause
)
5150 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5156 /* If we cannot insert/delete lines, it's no use trying it. */
5157 if (!FRAME_LINE_INS_DEL_OK (f
))
5160 /* See if any of the desired lines are enabled; don't compute for
5161 i/d line if just want cursor motion. */
5162 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5163 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5166 /* Try doing i/d line, if not yet inhibited. */
5167 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5168 force_p
|= scrolling (f
);
5170 /* Update the individual lines as needed. Do bottom line first. */
5171 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5172 update_frame_line (f
, desired_matrix
->nrows
- 1);
5174 /* Now update the rest of the lines. */
5175 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5177 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5179 if (FRAME_TERMCAP_P (f
))
5181 /* Flush out every so many lines.
5182 Also flush out if likely to have more than 1k buffered
5183 otherwise. I'm told that some telnet connections get
5184 really screwed by more than 1k output at once. */
5185 int outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
)->output
);
5187 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5189 fflush (FRAME_TTY (f
)->output
);
5190 if (preempt_count
== 1)
5192 #ifdef EMACS_OUTQSIZE
5193 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5194 /* Probably not a tty. Ignore the error and reset
5196 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5199 if (baud_rate
<= outq
&& baud_rate
> 0)
5200 sleep (outq
/ baud_rate
);
5205 if ((i
- 1) % preempt_count
== 0)
5206 detect_input_pending_ignore_squeezables ();
5208 update_frame_line (f
, i
);
5212 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5214 /* Now just clean up termcap drivers and set cursor, etc. */
5217 if ((cursor_in_echo_area
5218 /* If we are showing a message instead of the mini-buffer,
5219 show the cursor for the message instead of for the
5220 (now hidden) mini-buffer contents. */
5221 || (EQ (minibuf_window
, selected_window
)
5222 && EQ (minibuf_window
, echo_area_window
)
5223 && !NILP (echo_area_buffer
[0])))
5224 /* These cases apply only to the frame that contains
5225 the active mini-buffer window. */
5226 && FRAME_HAS_MINIBUF_P (f
)
5227 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5229 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5232 if (cursor_in_echo_area
< 0)
5234 /* Negative value of cursor_in_echo_area means put
5235 cursor at beginning of line. */
5241 /* Positive value of cursor_in_echo_area means put
5242 cursor at the end of the prompt. If the mini-buffer
5243 is several lines high, find the last line that has
5245 row
= FRAME_LINES (f
);
5251 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5253 /* Frame rows are filled up with spaces that
5254 must be ignored here. */
5255 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5257 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5258 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5261 && (last
- 1)->charpos
< 0)
5267 while (row
> top
&& col
== 0);
5269 /* Make sure COL is not out of range. */
5270 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5272 /* If we have another row, advance cursor into it. */
5273 if (row
< FRAME_LINES (f
) - 1)
5275 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5278 /* Otherwise move it back in range. */
5280 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5284 cursor_to (f
, row
, col
);
5288 /* We have only one cursor on terminal frames. Use it to
5289 display the cursor of the selected window. */
5290 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5291 if (w
->cursor
.vpos
>= 0
5292 /* The cursor vpos may be temporarily out of bounds
5293 in the following situation: There is one window,
5294 with the cursor in the lower half of it. The window
5295 is split, and a message causes a redisplay before
5296 a new cursor position has been computed. */
5297 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5299 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5300 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5302 if (INTEGERP (w
->left_margin_cols
))
5303 x
+= XFASTINT (w
->left_margin_cols
);
5305 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5306 cursor_to (f
, y
, x
);
5313 clear_desired_matrices (f
);
5318 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5322 struct frame
*frame
;
5324 int unchanged_at_top
, unchanged_at_bottom
;
5327 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5328 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5329 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5330 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5332 int free_at_end_vpos
= FRAME_LINES (frame
);
5333 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5334 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5336 if (!current_matrix
)
5339 /* Compute hash codes of all the lines. Also calculate number of
5340 changed lines, number of unchanged lines at the beginning, and
5341 number of unchanged lines at the end. */
5343 unchanged_at_top
= 0;
5344 unchanged_at_bottom
= FRAME_LINES (frame
);
5345 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5347 /* Give up on this scrolling if some old lines are not enabled. */
5348 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5350 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5351 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5353 /* This line cannot be redrawn, so don't let scrolling mess it. */
5354 new_hash
[i
] = old_hash
[i
];
5355 #define INFINITY 1000000 /* Taken from scroll.c */
5356 draw_cost
[i
] = INFINITY
;
5360 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5361 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5364 if (old_hash
[i
] != new_hash
[i
])
5367 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5369 else if (i
== unchanged_at_top
)
5371 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5374 /* If changed lines are few, don't allow preemption, don't scroll. */
5375 if ((!FRAME_SCROLL_REGION_OK (frame
)
5376 && changed_lines
< baud_rate
/ 2400)
5377 || unchanged_at_bottom
== FRAME_LINES (frame
))
5380 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5381 - unchanged_at_bottom
);
5383 if (FRAME_SCROLL_REGION_OK (frame
))
5384 free_at_end_vpos
-= unchanged_at_bottom
;
5385 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5386 free_at_end_vpos
= -1;
5388 /* If large window, fast terminal and few lines in common between
5389 current frame and desired frame, don't bother with i/d calc. */
5390 if (!FRAME_SCROLL_REGION_OK (frame
)
5391 && window_size
>= 18 && baud_rate
> 2400
5393 10 * scrolling_max_lines_saved (unchanged_at_top
,
5394 FRAME_LINES (frame
) - unchanged_at_bottom
,
5395 old_hash
, new_hash
, draw_cost
)))
5398 if (window_size
< 2)
5401 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5402 draw_cost
+ unchanged_at_top
- 1,
5403 old_draw_cost
+ unchanged_at_top
- 1,
5404 old_hash
+ unchanged_at_top
- 1,
5405 new_hash
+ unchanged_at_top
- 1,
5406 free_at_end_vpos
- unchanged_at_top
);
5412 /* Count the number of blanks at the start of the vector of glyphs R
5413 which is LEN glyphs long. */
5416 count_blanks (r
, len
)
5422 for (i
= 0; i
< len
; ++i
)
5423 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5430 /* Count the number of glyphs in common at the start of the glyph
5431 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5432 of STR2. Value is the number of equal glyphs equal at the start. */
5435 count_match (str1
, end1
, str2
, end2
)
5436 struct glyph
*str1
, *end1
, *str2
, *end2
;
5438 struct glyph
*p1
= str1
;
5439 struct glyph
*p2
= str2
;
5443 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5450 /* Char insertion/deletion cost vector, from term.c */
5452 extern int *char_ins_del_vector
;
5453 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5456 /* Perform a frame-based update on line VPOS in frame FRAME. */
5459 update_frame_line (f
, vpos
)
5463 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5465 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5466 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5467 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5468 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5469 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5470 int must_write_whole_line_p
;
5471 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5472 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5473 != FACE_TTY_DEFAULT_BG_COLOR
);
5475 if (colored_spaces_p
)
5478 /* Current row not enabled means it has unknown contents. We must
5479 write the whole desired line in that case. */
5480 must_write_whole_line_p
= !current_row
->enabled_p
;
5481 if (must_write_whole_line_p
)
5488 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5489 olen
= current_row
->used
[TEXT_AREA
];
5491 /* Ignore trailing spaces, if we can. */
5492 if (!write_spaces_p
)
5493 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5497 current_row
->enabled_p
= 1;
5498 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5500 /* If desired line is empty, just clear the line. */
5501 if (!desired_row
->enabled_p
)
5507 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5508 nlen
= desired_row
->used
[TEXT_AREA
];
5509 nend
= nbody
+ nlen
;
5511 /* If display line has unknown contents, write the whole line. */
5512 if (must_write_whole_line_p
)
5514 /* Ignore spaces at the end, if we can. */
5515 if (!write_spaces_p
)
5516 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5519 /* Write the contents of the desired line. */
5522 cursor_to (f
, vpos
, 0);
5523 write_glyphs (f
, nbody
, nlen
);
5526 /* Don't call clear_end_of_line if we already wrote the whole
5527 line. The cursor will not be at the right margin in that
5528 case but in the line below. */
5529 if (nlen
< FRAME_TOTAL_COLS (f
))
5531 cursor_to (f
, vpos
, nlen
);
5532 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5535 /* Make sure we are in the right row, otherwise cursor movement
5536 with cmgoto might use `ch' in the wrong row. */
5537 cursor_to (f
, vpos
, 0);
5539 make_current (desired_matrix
, current_matrix
, vpos
);
5543 /* Pretend trailing spaces are not there at all,
5544 unless for one reason or another we must write all spaces. */
5545 if (!write_spaces_p
)
5546 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5549 /* If there's no i/d char, quickly do the best we can without it. */
5550 if (!FRAME_CHAR_INS_DEL_OK (f
))
5554 /* Find the first glyph in desired row that doesn't agree with
5555 a glyph in the current row, and write the rest from there on. */
5556 for (i
= 0; i
< nlen
; i
++)
5558 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5560 /* Find the end of the run of different glyphs. */
5564 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5565 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5568 /* Output this run of non-matching chars. */
5569 cursor_to (f
, vpos
, i
);
5570 write_glyphs (f
, nbody
+ i
, j
- i
);
5573 /* Now find the next non-match. */
5577 /* Clear the rest of the line, or the non-clear part of it. */
5580 cursor_to (f
, vpos
, nlen
);
5581 clear_end_of_line (f
, olen
);
5584 /* Make current row = desired row. */
5585 make_current (desired_matrix
, current_matrix
, vpos
);
5589 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5590 characters in a row. */
5594 /* If current line is blank, skip over initial spaces, if
5595 possible, and write the rest. */
5599 nsp
= count_blanks (nbody
, nlen
);
5603 cursor_to (f
, vpos
, nsp
);
5604 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5607 /* Exchange contents between current_frame and new_frame. */
5608 make_current (desired_matrix
, current_matrix
, vpos
);
5612 /* Compute number of leading blanks in old and new contents. */
5613 osp
= count_blanks (obody
, olen
);
5614 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5616 /* Compute number of matching chars starting with first non-blank. */
5617 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5618 nbody
+ nsp
, nbody
+ nlen
);
5620 /* Spaces in new match implicit space past the end of old. */
5621 /* A bug causing this to be a no-op was fixed in 18.29. */
5622 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5625 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5629 /* Avoid doing insert/delete char
5630 just cause number of leading spaces differs
5631 when the following text does not match. */
5632 if (begmatch
== 0 && osp
!= nsp
)
5633 osp
= nsp
= min (osp
, nsp
);
5635 /* Find matching characters at end of line */
5638 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5640 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5645 endmatch
= obody
+ olen
- op1
;
5647 /* tem gets the distance to insert or delete.
5648 endmatch is how many characters we save by doing so.
5651 tem
= (nlen
- nsp
) - (olen
- osp
);
5653 && (!FRAME_CHAR_INS_DEL_OK (f
)
5654 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5657 /* nsp - osp is the distance to insert or delete.
5658 If that is nonzero, begmatch is known to be nonzero also.
5659 begmatch + endmatch is how much we save by doing the ins/del.
5663 && (!FRAME_CHAR_INS_DEL_OK (f
)
5664 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5668 osp
= nsp
= min (osp
, nsp
);
5671 /* Now go through the line, inserting, writing and
5672 deleting as appropriate. */
5676 cursor_to (f
, vpos
, nsp
);
5677 delete_glyphs (f
, osp
- nsp
);
5681 /* If going to delete chars later in line
5682 and insert earlier in the line,
5683 must delete first to avoid losing data in the insert */
5684 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5686 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5687 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5688 olen
= nlen
- (nsp
- osp
);
5690 cursor_to (f
, vpos
, osp
);
5691 insert_glyphs (f
, 0, nsp
- osp
);
5695 tem
= nsp
+ begmatch
+ endmatch
;
5696 if (nlen
!= tem
|| olen
!= tem
)
5698 if (!endmatch
|| nlen
== olen
)
5700 /* If new text being written reaches right margin, there is
5701 no need to do clear-to-eol at the end of this function
5702 (and it would not be safe, since cursor is not going to
5703 be "at the margin" after the text is done). */
5704 if (nlen
== FRAME_TOTAL_COLS (f
))
5707 /* Function write_glyphs is prepared to do nothing
5708 if passed a length <= 0. Check it here to avoid
5709 unnecessary cursor movement. */
5712 cursor_to (f
, vpos
, nsp
+ begmatch
);
5713 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5716 else if (nlen
> olen
)
5718 /* Here, we used to have the following simple code:
5719 ----------------------------------------
5720 write_glyphs (nbody + nsp + begmatch, olen - tem);
5721 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5722 ----------------------------------------
5723 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5724 is a padding glyph. */
5725 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5728 cursor_to (f
, vpos
, nsp
+ begmatch
);
5730 /* Calculate columns we can actually overwrite. */
5731 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5733 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5735 /* If we left columns to be overwritten, we must delete them. */
5736 del
= olen
- tem
- out
;
5738 delete_glyphs (f
, del
);
5740 /* At last, we insert columns not yet written out. */
5741 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5744 else if (olen
> nlen
)
5746 cursor_to (f
, vpos
, nsp
+ begmatch
);
5747 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5748 delete_glyphs (f
, olen
- nlen
);
5754 /* If any unerased characters remain after the new line, erase them. */
5757 cursor_to (f
, vpos
, nlen
);
5758 clear_end_of_line (f
, olen
);
5761 /* Exchange contents between current_frame and new_frame. */
5762 make_current (desired_matrix
, current_matrix
, vpos
);
5767 /***********************************************************************
5768 X/Y Position -> Buffer Position
5769 ***********************************************************************/
5771 /* Determine what's under window-relative pixel position (*X, *Y).
5772 Return the object (string or buffer) that's there.
5773 Return in *POS the position in that object.
5774 Adjust *X and *Y to character positions. */
5777 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5780 struct display_pos
*pos
;
5781 Lisp_Object
*object
;
5783 int *width
, *height
;
5786 struct buffer
*old_current_buffer
= current_buffer
;
5787 struct text_pos startp
;
5789 struct glyph_row
*row
;
5790 #ifdef HAVE_WINDOW_SYSTEM
5791 struct image
*img
= 0;
5795 current_buffer
= XBUFFER (w
->buffer
);
5796 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5797 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5798 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5799 start_display (&it
, w
, startp
);
5801 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5802 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5803 MOVE_TO_X
| MOVE_TO_Y
);
5805 current_buffer
= old_current_buffer
;
5807 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5808 *dy
= *y
- it
.current_y
;
5811 if (STRINGP (it
.string
))
5815 #ifdef HAVE_WINDOW_SYSTEM
5816 if (it
.what
== IT_IMAGE
)
5818 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5819 && !NILP (img
->spec
))
5820 *object
= img
->spec
;
5824 if (it
.vpos
< w
->current_matrix
->nrows
5825 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5828 if (it
.hpos
< row
->used
[TEXT_AREA
])
5830 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5831 #ifdef HAVE_WINDOW_SYSTEM
5834 *dy
-= row
->ascent
- glyph
->ascent
;
5835 *dx
+= glyph
->slice
.x
;
5836 *dy
+= glyph
->slice
.y
;
5837 /* Image slices positions are still relative to the entire image */
5838 *width
= img
->width
;
5839 *height
= img
->height
;
5844 *width
= glyph
->pixel_width
;
5845 *height
= glyph
->ascent
+ glyph
->descent
;
5851 *height
= row
->height
;
5856 *width
= *height
= 0;
5859 /* Add extra (default width) columns if clicked after EOL. */
5860 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5862 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5871 /* Value is the string under window-relative coordinates X/Y in the
5872 mode line or header line (PART says which) of window W, or nil if none.
5873 *CHARPOS is set to the position in the string returned. */
5876 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5878 enum window_part part
;
5881 Lisp_Object
*object
;
5883 int *width
, *height
;
5885 struct glyph_row
*row
;
5886 struct glyph
*glyph
, *end
;
5888 Lisp_Object string
= Qnil
;
5890 if (part
== ON_MODE_LINE
)
5891 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5893 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5895 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5897 if (row
->mode_line_p
&& row
->enabled_p
)
5899 /* Find the glyph under X. If we find one with a string object,
5900 it's the one we were looking for. */
5901 glyph
= row
->glyphs
[TEXT_AREA
];
5902 end
= glyph
+ row
->used
[TEXT_AREA
];
5903 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5904 x0
-= glyph
->pixel_width
;
5905 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5908 string
= glyph
->object
;
5909 *charpos
= glyph
->charpos
;
5910 *width
= glyph
->pixel_width
;
5911 *height
= glyph
->ascent
+ glyph
->descent
;
5912 #ifdef HAVE_WINDOW_SYSTEM
5913 if (glyph
->type
== IMAGE_GLYPH
)
5916 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5918 *object
= img
->spec
;
5919 y0
-= row
->ascent
- glyph
->ascent
;
5925 /* Add extra (default width) columns if clicked after EOL. */
5926 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5928 *height
= row
->height
;
5935 *width
= *height
= 0;
5945 /* Value is the string under window-relative coordinates X/Y in either
5946 marginal area, or nil if none. *CHARPOS is set to the position in
5947 the string returned. */
5950 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5952 enum window_part part
;
5955 Lisp_Object
*object
;
5957 int *width
, *height
;
5959 struct glyph_row
*row
= w
->current_matrix
->rows
;
5960 struct glyph
*glyph
, *end
;
5961 int x0
, y0
, i
, wy
= *y
;
5963 Lisp_Object string
= Qnil
;
5965 if (part
== ON_LEFT_MARGIN
)
5966 area
= LEFT_MARGIN_AREA
;
5967 else if (part
== ON_RIGHT_MARGIN
)
5968 area
= RIGHT_MARGIN_AREA
;
5972 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5973 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5976 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5980 /* Find the glyph under X. If we find one with a string object,
5981 it's the one we were looking for. */
5982 if (area
== RIGHT_MARGIN_AREA
)
5983 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5984 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5985 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5986 + window_box_width (w
, LEFT_MARGIN_AREA
)
5987 + window_box_width (w
, TEXT_AREA
));
5989 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5990 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5993 glyph
= row
->glyphs
[area
];
5994 end
= glyph
+ row
->used
[area
];
5995 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5996 x0
-= glyph
->pixel_width
;
5997 *x
= glyph
- row
->glyphs
[area
];
6000 string
= glyph
->object
;
6001 *charpos
= glyph
->charpos
;
6002 *width
= glyph
->pixel_width
;
6003 *height
= glyph
->ascent
+ glyph
->descent
;
6004 #ifdef HAVE_WINDOW_SYSTEM
6005 if (glyph
->type
== IMAGE_GLYPH
)
6008 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6010 *object
= img
->spec
;
6011 y0
-= row
->ascent
- glyph
->ascent
;
6012 x0
+= glyph
->slice
.x
;
6013 y0
+= glyph
->slice
.y
;
6019 /* Add extra (default width) columns if clicked after EOL. */
6020 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6022 *height
= row
->height
;
6029 *width
= *height
= 0;
6039 /***********************************************************************
6040 Changing Frame Sizes
6041 ***********************************************************************/
6046 window_change_signal (signalnum
) /* If we don't have an argument, */
6047 int signalnum
; /* some compilers complain in signal calls. */
6053 int old_errno
= errno
;x
6055 struct tty_display_info
*tty
;
6057 signal (SIGWINCH
, window_change_signal
);
6058 SIGNAL_THREAD_CHECK (signalnum
);
6060 /* The frame size change obviously applies to a single
6061 termcap-controlled terminal, but we can't decide which.
6062 Therefore, we resize the frames corresponding to each tty.
6064 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6066 if (! tty
->term_initted
)
6069 get_tty_size (fileno (tty
->input
), &width
, &height
);
6071 if (width
> 5 && height
> 2) {
6072 Lisp_Object tail
, frame
;
6074 FOR_EACH_FRAME (tail
, frame
)
6075 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6076 /* Record the new sizes, but don't reallocate the data
6077 structures now. Let that be done later outside of the
6079 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6085 #endif /* SIGWINCH */
6088 /* Do any change in frame size that was requested by a signal. SAFE
6089 non-zero means this function is called from a place where it is
6090 safe to change frame sizes while a redisplay is in progress. */
6093 do_pending_window_change (safe
)
6096 /* If window_change_signal should have run before, run it now. */
6097 if (redisplaying_p
&& !safe
)
6100 while (delayed_size_change
)
6102 Lisp_Object tail
, frame
;
6104 delayed_size_change
= 0;
6106 FOR_EACH_FRAME (tail
, frame
)
6108 struct frame
*f
= XFRAME (frame
);
6110 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6111 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6118 /* Change the frame height and/or width. Values may be given as zero to
6119 indicate no change is to take place.
6121 If DELAY is non-zero, then assume we're being called from a signal
6122 handler, and queue the change for later - perhaps the next
6123 redisplay. Since this tries to resize windows, we can't call it
6124 from a signal handler.
6126 SAFE non-zero means this function is called from a place where it's
6127 safe to change frame sizes while a redisplay is in progress. */
6130 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6131 register struct frame
*f
;
6132 int newheight
, newwidth
, pretend
, delay
, safe
;
6134 Lisp_Object tail
, frame
;
6136 if (FRAME_MSDOS_P (f
))
6138 /* On MS-DOS, all frames use the same screen, so a change in
6139 size affects all frames. Termcap now supports multiple
6141 FOR_EACH_FRAME (tail
, frame
)
6142 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6143 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6144 pretend
, delay
, safe
);
6147 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6151 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6152 register struct frame
*f
;
6153 int newheight
, newwidth
, pretend
, delay
, safe
;
6155 int new_frame_total_cols
;
6156 int count
= SPECPDL_INDEX ();
6158 /* If we can't deal with the change now, queue it for later. */
6159 if (delay
|| (redisplaying_p
&& !safe
))
6161 f
->new_text_lines
= newheight
;
6162 f
->new_text_cols
= newwidth
;
6163 delayed_size_change
= 1;
6167 /* This size-change overrides any pending one for this frame. */
6168 f
->new_text_lines
= 0;
6169 f
->new_text_cols
= 0;
6171 /* If an argument is zero, set it to the current value. */
6173 newheight
= FRAME_LINES (f
);
6175 newwidth
= FRAME_COLS (f
);
6177 /* Compute width of windows in F.
6178 This is the width of the frame without vertical scroll bars. */
6179 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6181 /* Round up to the smallest acceptable size. */
6182 check_frame_size (f
, &newheight
, &newwidth
);
6184 /* If we're not changing the frame size, quit now. */
6185 if (newheight
== FRAME_LINES (f
)
6186 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6192 /* We only can set screen dimensions to certain values supported
6193 by our video hardware. Try to find the smallest size greater
6194 or equal to the requested dimensions. */
6195 dos_set_window_size (&newheight
, &newwidth
);
6198 if (newheight
!= FRAME_LINES (f
))
6200 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6202 /* Frame has both root and mini-buffer. */
6203 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6204 FRAME_TOP_MARGIN (f
));
6205 set_window_height (FRAME_ROOT_WINDOW (f
),
6208 - FRAME_TOP_MARGIN (f
)),
6210 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6212 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6215 /* Frame has just one top-level window. */
6216 set_window_height (FRAME_ROOT_WINDOW (f
),
6217 newheight
- FRAME_TOP_MARGIN (f
), 0);
6219 if (FRAME_TERMCAP_P (f
) && !pretend
)
6220 FrameRows (FRAME_TTY (f
)) = newheight
;
6223 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6225 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6226 if (FRAME_HAS_MINIBUF_P (f
))
6227 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6229 if (FRAME_TERMCAP_P (f
) && !pretend
)
6230 FrameCols (FRAME_TTY (f
)) = newwidth
;
6232 if (WINDOWP (f
->tool_bar_window
))
6233 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6236 FRAME_LINES (f
) = newheight
;
6237 SET_FRAME_COLS (f
, newwidth
);
6240 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6241 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6243 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6245 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6246 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6247 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6248 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6252 calculate_costs (f
);
6253 SET_FRAME_GARBAGED (f
);
6258 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6260 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6261 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6262 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6264 unbind_to (count
, Qnil
);
6269 /***********************************************************************
6270 Terminal Related Lisp Functions
6271 ***********************************************************************/
6273 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6274 1, 1, "FOpen termscript file: ",
6275 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6276 FILE = nil means just close any termscript file currently open. */)
6280 struct tty_display_info
*tty
;
6282 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6283 error ("Current frame is not on a tty device");
6287 if (tty
->termscript
!= 0)
6288 fclose (tty
->termscript
);
6289 tty
->termscript
= 0;
6293 file
= Fexpand_file_name (file
, Qnil
);
6294 tty
->termscript
= fopen (SDATA (file
), "w");
6295 if (tty
->termscript
== 0)
6296 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6302 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6303 Ssend_string_to_terminal
, 1, 2, 0,
6304 doc
: /* Send STRING to the terminal without alteration.
6305 Control characters in STRING will have terminal-dependent effects.
6307 Optional parameter TERMINAL specifies the tty display device to use.
6308 It may be a terminal id, a frame, or nil for the terminal used by the
6309 currently selected frame. */)
6312 Lisp_Object display
;
6314 struct device
*d
= get_tty_device (display
);
6315 struct tty_display_info
*tty
;
6317 /* ??? Perhaps we should do something special for multibyte strings here. */
6318 CHECK_STRING (string
);
6321 error ("Unknown display device");
6323 tty
= d
->display_info
.tty
;
6325 if (tty
->termscript
)
6327 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6328 fflush (tty
->termscript
);
6330 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->output
);
6331 fflush (tty
->output
);
6336 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6337 doc
: /* Beep, or flash the screen.
6338 Also, unless an argument is given,
6339 terminate any keyboard macro currently executing. */)
6348 ring_bell (XFRAME (selected_frame
));
6361 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6362 error ("Keyboard macro terminated by a command ringing the bell");
6364 ring_bell (XFRAME (selected_frame
));
6369 /***********************************************************************
6371 ***********************************************************************/
6373 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6374 doc
: /* Pause, without updating display, for SECONDS seconds.
6375 SECONDS may be a floating-point value, meaning that you can wait for a
6376 fraction of a second. Optional second arg MILLISECONDS specifies an
6377 additional wait period, in milliseconds; this may be useful if your
6378 Emacs was built without floating point support.
6379 \(Not all operating systems support waiting for a fraction of a second.) */)
6380 (seconds
, milliseconds
)
6381 Lisp_Object seconds
, milliseconds
;
6385 if (NILP (milliseconds
))
6386 XSETINT (milliseconds
, 0);
6388 CHECK_NUMBER (milliseconds
);
6389 usec
= XINT (milliseconds
) * 1000;
6392 double duration
= extract_float (seconds
);
6393 sec
= (int) duration
;
6394 usec
+= (duration
- sec
) * 1000000;
6397 #ifndef EMACS_HAS_USECS
6398 if (sec
== 0 && usec
!= 0)
6399 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6402 /* Assure that 0 <= usec < 1000000. */
6405 /* We can't rely on the rounding being correct if usec is negative. */
6406 if (-1000000 < usec
)
6407 sec
--, usec
+= 1000000;
6409 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6412 sec
+= usec
/ 1000000, usec
%= 1000000;
6414 if (sec
< 0 || (sec
== 0 && usec
== 0))
6417 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6423 /* This is just like wait_reading_process_output, except that
6424 it does the redisplay.
6426 It's also much like Fsit_for, except that it can be used for
6427 waiting for input as well. */
6430 sit_for (sec
, usec
, reading
, display
, initial_display
)
6431 int sec
, usec
, reading
, display
, initial_display
;
6433 swallow_events (display
);
6435 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6438 if (initial_display
)
6439 redisplay_preserve_echo_area (2);
6441 if (sec
== 0 && usec
== 0)
6448 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6451 return detect_input_pending () ? Qnil
: Qt
;
6455 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6456 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6457 SECONDS may be a floating-point value, meaning that you can wait for a
6458 fraction of a second.
6459 \(Not all operating systems support waiting for a fraction of a second.)
6460 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6461 Redisplay is preempted as always if input arrives, and does not happen
6462 if input is available before it starts.
6463 Value is t if waited the full time with no input arriving.
6465 An obsolete but still supported form is
6466 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6467 Where the optional arg MILLISECONDS specifies an additional wait period,
6468 in milliseconds; this was useful when Emacs was built without
6469 floating point support.
6470 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6472 /* The `old-nodisp' stuff is there so that the arglist has the correct
6473 length. Otherwise, `defdvice' will redefine it with fewer args. */
6474 (seconds
, milliseconds
, nodisp
)
6475 Lisp_Object seconds
, milliseconds
, nodisp
;
6479 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6481 nodisp
= milliseconds
;
6482 milliseconds
= Qnil
;
6485 if (NILP (milliseconds
))
6486 XSETINT (milliseconds
, 0);
6488 CHECK_NUMBER (milliseconds
);
6489 usec
= XINT (milliseconds
) * 1000;
6492 double duration
= extract_float (seconds
);
6493 sec
= (int) duration
;
6494 usec
+= (duration
- sec
) * 1000000;
6497 #ifndef EMACS_HAS_USECS
6498 if (usec
!= 0 && sec
== 0)
6499 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6502 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6507 /***********************************************************************
6508 Other Lisp Functions
6509 ***********************************************************************/
6511 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6512 session's frames, frame names, buffers, buffer-read-only flags, and
6513 buffer-modified-flags. */
6515 static Lisp_Object frame_and_buffer_state
;
6518 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6519 Sframe_or_buffer_changed_p
, 0, 1, 0,
6520 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6521 VARIABLE is a variable name whose value is either nil or a state vector
6522 that will be updated to contain all frames and buffers,
6523 aside from buffers whose names start with space,
6524 along with the buffers' read-only and modified flags. This allows a fast
6525 check to see whether buffer menus might need to be recomputed.
6526 If this function returns non-nil, it updates the internal vector to reflect
6529 If VARIABLE is nil, an internal variable is used. Users should not
6530 pass nil for VARIABLE. */)
6532 Lisp_Object variable
;
6534 Lisp_Object state
, tail
, frame
, buf
;
6535 Lisp_Object
*vecp
, *end
;
6538 if (! NILP (variable
))
6540 CHECK_SYMBOL (variable
);
6541 state
= Fsymbol_value (variable
);
6542 if (! VECTORP (state
))
6546 state
= frame_and_buffer_state
;
6548 vecp
= XVECTOR (state
)->contents
;
6549 end
= vecp
+ XVECTOR (state
)->size
;
6551 FOR_EACH_FRAME (tail
, frame
)
6555 if (!EQ (*vecp
++, frame
))
6559 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6562 /* Check that the buffer info matches. */
6563 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6565 buf
= XCDR (XCAR (tail
));
6566 /* Ignore buffers that aren't included in buffer lists. */
6567 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6571 if (!EQ (*vecp
++, buf
))
6575 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6579 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6584 /* Detect deletion of a buffer at the end of the list. */
6585 if (EQ (*vecp
, Qlambda
))
6588 /* Come here if we decide the data has changed. */
6590 /* Count the size we will need.
6591 Start with 1 so there is room for at least one lambda at the end. */
6593 FOR_EACH_FRAME (tail
, frame
)
6595 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6597 /* Reallocate the vector if data has grown to need it,
6598 or if it has shrunk a lot. */
6599 if (! VECTORP (state
)
6600 || n
> XVECTOR (state
)->size
6601 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6602 /* Add 20 extra so we grow it less often. */
6604 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6605 if (! NILP (variable
))
6606 Fset (variable
, state
);
6608 frame_and_buffer_state
= state
;
6611 /* Record the new data in the (possibly reallocated) vector. */
6612 vecp
= XVECTOR (state
)->contents
;
6613 FOR_EACH_FRAME (tail
, frame
)
6616 *vecp
++ = XFRAME (frame
)->name
;
6618 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6620 buf
= XCDR (XCAR (tail
));
6621 /* Ignore buffers that aren't included in buffer lists. */
6622 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6625 *vecp
++ = XBUFFER (buf
)->read_only
;
6626 *vecp
++ = Fbuffer_modified_p (buf
);
6628 /* Fill up the vector with lambdas (always at least one). */
6630 while (vecp
- XVECTOR (state
)->contents
6631 < XVECTOR (state
)->size
)
6633 /* Make sure we didn't overflow the vector. */
6634 if (vecp
- XVECTOR (state
)->contents
6635 > XVECTOR (state
)->size
)
6642 /***********************************************************************
6644 ***********************************************************************/
6646 /* Initialization done when Emacs fork is started, before doing stty.
6647 Determine terminal type and set terminal_driver. Then invoke its
6648 decoding routine to set up variables in the terminal package. */
6653 char *terminal_type
;
6655 #ifdef HAVE_X_WINDOWS
6656 extern int display_arg
;
6659 /* Construct the space glyph. */
6660 space_glyph
.type
= CHAR_GLYPH
;
6661 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6662 space_glyph
.charpos
= -1;
6665 cursor_in_echo_area
= 0;
6666 terminal_type
= (char *) 0;
6668 /* Now is the time to initialize this; it's used by init_sys_modes
6670 Vinitial_window_system
= Qnil
;
6672 /* SIGWINCH needs to be handled no matter what display we start
6673 with. Otherwise newly opened tty frames will not resize
6678 #endif /* CANNOT_DUMP */
6679 signal (SIGWINCH
, window_change_signal
);
6680 #endif /* SIGWINCH */
6682 /* If the user wants to use a window system, we shouldn't bother
6683 initializing the terminal. This is especially important when the
6684 terminal is so dumb that emacs gives up before and doesn't bother
6685 using the window system.
6687 If the DISPLAY environment variable is set and nonempty,
6688 try to use X, and die with an error message if that doesn't work. */
6690 #ifdef HAVE_X_WINDOWS
6695 display
= getenv ("DECW$DISPLAY");
6697 display
= getenv ("DISPLAY");
6700 display_arg
= (display
!= 0 && *display
!= 0);
6703 if (!inhibit_window_system
&& display_arg
6709 Vinitial_window_system
= intern ("x");
6711 Vwindow_system_version
= make_number (11);
6713 Vwindow_system_version
= make_number (10);
6715 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6716 /* In some versions of ncurses,
6717 tputs crashes if we have not called tgetent.
6719 { char b
[2044]; tgetent (b
, "xterm");}
6721 adjust_frame_glyphs_initially ();
6724 #endif /* HAVE_X_WINDOWS */
6727 if (!inhibit_window_system
)
6729 Vinitial_window_system
= intern ("w32");
6730 Vwindow_system_version
= make_number (1);
6731 adjust_frame_glyphs_initially ();
6734 #endif /* HAVE_NTGUI */
6737 if (!inhibit_window_system
)
6739 Vinitial_window_system
= intern ("mac");
6740 Vwindow_system_version
= make_number (1);
6741 adjust_frame_glyphs_initially ();
6746 /* If no window system has been specified, try to use the terminal. */
6749 fatal ("standard input is not a tty");
6753 /* Look at the TERM variable. */
6754 terminal_type
= (char *) getenv ("TERM");
6758 fprintf (stderr
, "Please specify your terminal type.\n\
6759 For types defined in VMS, use set term /device=TYPE.\n\
6760 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6761 \(The quotation marks are necessary since terminal types are lower case.)\n");
6763 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6769 /* VMS DCL tends to up-case things, so down-case term type.
6770 Hardly any uppercase letters in terminal types; should be none. */
6772 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6775 strcpy (new, terminal_type
);
6777 for (p
= new; *p
; p
++)
6781 terminal_type
= new;
6787 struct frame
*f
= XFRAME (selected_frame
);
6789 /* Open a display on the controlling tty. */
6790 d
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6792 /* Convert the initial frame to use the new display. */
6793 if (f
->output_method
!= output_initial
)
6795 f
->output_method
= d
->type
;
6798 d
->reference_count
++;
6799 d
->display_info
.tty
->top_frame
= selected_frame
;
6800 change_frame_size (XFRAME (selected_frame
),
6801 FrameRows (d
->display_info
.tty
),
6802 FrameCols (d
->display_info
.tty
), 0, 0, 1);
6804 /* Delete the initial display. */
6805 if (--initial_device
->reference_count
== 0
6806 && initial_device
->delete_device_hook
)
6807 (*initial_device
->delete_device_hook
) (initial_device
);
6809 /* Update frame parameters to reflect the new type. */
6810 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qwindow_system
, Qnil
), Qnil
));
6811 Fmodify_frame_parameters
6812 (selected_frame
, Fcons (Fcons (Qtty_type
,
6813 Fdisplay_tty_type (selected_frame
)), Qnil
));
6814 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
), Qnil
));
6818 struct frame
*sf
= SELECTED_FRAME ();
6819 int width
= FRAME_TOTAL_COLS (sf
);
6820 int height
= FRAME_LINES (sf
);
6822 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6824 /* If these sizes are so big they cause overflow, just ignore the
6825 change. It's not clear what better we could do. */
6826 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6827 fatal ("screen size %dx%d too big", width
, height
);
6830 adjust_frame_glyphs_initially ();
6831 calculate_costs (XFRAME (selected_frame
));
6833 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6837 /* The MSDOS terminal turns on its ``window system'' relatively
6838 late into the startup, so we cannot do the frame faces'
6839 initialization just yet. It will be done later by pc-win.el
6840 and internal_terminal_init. */
6841 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6843 && NILP (Vinitial_window_system
))
6845 /* For the initial frame, we don't have any way of knowing what
6846 are the foreground and background colors of the terminal. */
6847 struct frame
*sf
= SELECTED_FRAME();
6849 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6850 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6851 call0 (intern ("tty-set-up-initial-frame-faces"));
6857 /***********************************************************************
6859 ***********************************************************************/
6861 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6862 Sinternal_show_cursor
, 2, 2, 0,
6863 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6864 WINDOW nil means use the selected window. SHOW non-nil means
6865 show a cursor in WINDOW in the next redisplay. SHOW nil means
6866 don't show a cursor. */)
6868 Lisp_Object window
, show
;
6870 /* Don't change cursor state while redisplaying. This could confuse
6872 if (!redisplaying_p
)
6875 window
= selected_window
;
6877 CHECK_WINDOW (window
);
6879 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6886 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6887 Sinternal_show_cursor_p
, 0, 1, 0,
6888 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6889 WINDOW nil or omitted means report on the selected window. */)
6896 window
= selected_window
;
6898 CHECK_WINDOW (window
);
6900 w
= XWINDOW (window
);
6901 return w
->cursor_off_p
? Qnil
: Qt
;
6905 /***********************************************************************
6907 ***********************************************************************/
6912 defsubr (&Sredraw_frame
);
6913 defsubr (&Sredraw_display
);
6914 defsubr (&Sframe_or_buffer_changed_p
);
6915 defsubr (&Sopen_termscript
);
6917 defsubr (&Ssit_for
);
6918 defsubr (&Ssleep_for
);
6919 defsubr (&Ssend_string_to_terminal
);
6920 defsubr (&Sinternal_show_cursor
);
6921 defsubr (&Sinternal_show_cursor_p
);
6924 defsubr (&Sdump_redisplay_history
);
6927 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6928 staticpro (&frame_and_buffer_state
);
6930 Qdisplay_table
= intern ("display-table");
6931 staticpro (&Qdisplay_table
);
6932 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6933 staticpro (&Qredisplay_dont_pause
);
6935 DEFVAR_INT ("baud-rate", &baud_rate
,
6936 doc
: /* *The output baud rate of the terminal.
6937 On most systems, changing this value will affect the amount of padding
6938 and the other strategic decisions made during redisplay. */);
6940 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6941 doc
: /* *Non-nil means invert the entire frame display.
6942 This means everything is in inverse video which otherwise would not be. */);
6944 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6945 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6947 See also `ring-bell-function'. */);
6949 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6950 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6951 A non-nil value is useful if the terminal can automatically preserve
6952 Emacs's frame display when you reenter Emacs.
6953 It is up to you to set this variable if your terminal can do that. */);
6955 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6956 doc
: /* Name of the window system that Emacs uses for the first frame.
6957 The value is a symbol--for instance, `x' for X windows.
6958 The value is nil if Emacs is using a text-only terminal. */);
6960 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6961 doc
: /* The version number of the window system in use.
6962 For X windows, this is 10 or 11. */);
6964 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6965 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6967 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6968 doc
: /* Table defining how to output a glyph code to the frame.
6969 If not nil, this is a vector indexed by glyph code to define the glyph.
6970 Each element can be:
6971 integer: a glyph code which this glyph is an alias for.
6972 string: output this glyph using that string (not impl. in X windows).
6973 nil: this glyph mod 524288 is the code of a character to output,
6974 and this glyph / 524288 is the face number (see `face-id') to use
6975 while outputting it. */);
6976 Vglyph_table
= Qnil
;
6978 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6979 doc
: /* Display table to use for buffers that specify none.
6980 See `buffer-display-table' for more information. */);
6981 Vstandard_display_table
= Qnil
;
6983 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6984 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6985 redisplay_dont_pause
= 0;
6987 /* Initialize `window-system', unless init_display already decided it. */
6992 Vinitial_window_system
= Qnil
;
6993 Vwindow_system_version
= Qnil
;
6997 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6998 (do not change this comment) */