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 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.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
220 Lisp_Object Vwindow_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 /* Stdio stream being used for copy of all output. */
266 /* Structure for info on cursor positioning. */
270 /* 1 means SIGWINCH happened when not safe. */
272 int delayed_size_change
;
274 /* 1 means glyph initialization has been completed at startup. */
276 static int glyphs_initialized_initially_p
;
278 /* Updated window if != 0. Set by update_window. */
280 struct window
*updated_window
;
282 /* Glyph row updated in update_window_line, and area that is updated. */
284 struct glyph_row
*updated_row
;
287 /* A glyph for a space. */
289 struct glyph space_glyph
;
291 /* Non-zero means update has been performed directly, so that there's
292 no need for redisplay_internal to do much work. Set by
293 direct_output_for_insert. */
295 int redisplay_performed_directly_p
;
297 /* Counts of allocated structures. These counts serve to diagnose
298 memory leaks and double frees. */
300 int glyph_matrix_count
;
301 int glyph_pool_count
;
303 /* If non-null, the frame whose frame matrices are manipulated. If
304 null, window matrices are worked on. */
306 static struct frame
*frame_matrix_frame
;
308 /* Current interface for window-based redisplay. Set from init_xterm.
309 A null value means we are not using window-based redisplay. */
311 struct redisplay_interface
*rif
;
313 /* Non-zero means that fonts have been loaded since the last glyph
314 matrix adjustments. Redisplay must stop, and glyph matrices must
315 be adjusted when this flag becomes non-zero during display. The
316 reason fonts can be loaded so late is that fonts of fontsets are
321 /* Convert vpos and hpos from frame to window and vice versa.
322 This may only be used for terminal frames. */
326 static int window_to_frame_vpos
P_ ((struct window
*, int));
327 static int window_to_frame_hpos
P_ ((struct window
*, int));
328 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
329 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
331 /* One element of the ring buffer containing redisplay history
334 struct redisplay_history
336 char trace
[512 + 100];
339 /* The size of the history buffer. */
341 #define REDISPLAY_HISTORY_SIZE 30
343 /* The redisplay history buffer. */
345 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
347 /* Next free entry in redisplay_history. */
349 static int history_idx
;
351 /* A tick that's incremented each time something is added to the
354 static unsigned history_tick
;
356 static void add_frame_display_history
P_ ((struct frame
*, int));
357 static void add_window_display_history
P_ ((struct window
*, char *, int));
360 /* Add to the redisplay history how window W has been displayed.
361 MSG is a trace containing the information how W's glyph matrix
362 has been constructed. PAUSED_P non-zero means that the update
363 has been interrupted for pending input. */
366 add_window_display_history (w
, msg
, paused_p
)
373 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
375 buf
= redisplay_history
[history_idx
].trace
;
378 sprintf (buf
, "%d: window %p (`%s')%s\n",
381 ((BUFFERP (w
->buffer
)
382 && STRINGP (XBUFFER (w
->buffer
)->name
))
383 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
385 paused_p
? " ***paused***" : "");
390 /* Add to the redisplay history that frame F has been displayed.
391 PAUSED_P non-zero means that the update has been interrupted for
395 add_frame_display_history (f
, paused_p
)
401 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
403 buf
= redisplay_history
[history_idx
].trace
;
406 sprintf (buf
, "%d: update frame %p%s",
408 f
, paused_p
? " ***paused***" : "");
412 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
413 Sdump_redisplay_history
, 0, 0, "",
414 doc
: /* Dump redisplay history to stderr. */)
419 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
422 i
= REDISPLAY_HISTORY_SIZE
- 1;
423 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
430 #else /* GLYPH_DEBUG == 0 */
432 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
433 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
435 #endif /* GLYPH_DEBUG == 0 */
438 /* Like bcopy except never gets confused by overlap. Let this be the
439 first function defined in this file, or change emacs.c where the
440 address of this function is used. */
443 safe_bcopy (from
, to
, size
)
448 if (size
<= 0 || from
== to
)
451 /* If the source and destination don't overlap, then bcopy can
452 handle it. If they do overlap, but the destination is lower in
453 memory than the source, we'll assume bcopy can handle that. */
454 if (to
< from
|| from
+ size
<= to
)
455 bcopy (from
, to
, size
);
457 /* Otherwise, we'll copy from the end. */
460 register const char *endf
= from
+ size
;
461 register char *endt
= to
+ size
;
463 /* If TO - FROM is large, then we should break the copy into
464 nonoverlapping chunks of TO - FROM bytes each. However, if
465 TO - FROM is small, then the bcopy function call overhead
466 makes this not worth it. The crossover point could be about
467 anywhere. Since I don't think the obvious copy loop is too
468 bad, I'm trying to err in its favor. */
473 while (endf
!= from
);
485 bcopy (endf
, endt
, to
- from
);
488 /* If SIZE wasn't a multiple of TO - FROM, there will be a
489 little left over. The amount left over is (endt + (to -
490 from)) - to, which is endt - from. */
491 bcopy (from
, to
, endt
- from
);
498 /***********************************************************************
500 ***********************************************************************/
502 /* Allocate and return a glyph_matrix structure. POOL is the glyph
503 pool from which memory for the matrix should be allocated, or null
504 for window-based redisplay where no glyph pools are used. The
505 member `pool' of the glyph matrix structure returned is set to
506 POOL, the structure is otherwise zeroed. */
508 struct glyph_matrix
*
509 new_glyph_matrix (pool
)
510 struct glyph_pool
*pool
;
512 struct glyph_matrix
*result
;
514 /* Allocate and clear. */
515 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
516 bzero (result
, sizeof *result
);
518 /* Increment number of allocated matrices. This count is used
519 to detect memory leaks. */
520 ++glyph_matrix_count
;
522 /* Set pool and return. */
528 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
530 The global counter glyph_matrix_count is decremented when a matrix
531 is freed. If the count gets negative, more structures were freed
532 than allocated, i.e. one matrix was freed more than once or a bogus
533 pointer was passed to this function.
535 If MATRIX->pool is null, this means that the matrix manages its own
536 glyph memory---this is done for matrices on X frames. Freeing the
537 matrix also frees the glyph memory in this case. */
540 free_glyph_matrix (matrix
)
541 struct glyph_matrix
*matrix
;
547 /* Detect the case that more matrices are freed than were
549 if (--glyph_matrix_count
< 0)
552 /* Free glyph memory if MATRIX owns it. */
553 if (matrix
->pool
== NULL
)
554 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
555 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
557 /* Free row structures and the matrix itself. */
558 xfree (matrix
->rows
);
564 /* Return the number of glyphs to reserve for a marginal area of
565 window W. TOTAL_GLYPHS is the number of glyphs in a complete
566 display line of window W. MARGIN gives the width of the marginal
567 area in canonical character units. MARGIN should be an integer
571 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
578 if (NUMBERP (margin
))
580 int width
= XFASTINT (w
->total_cols
);
581 double d
= max (0, XFLOATINT (margin
));
582 d
= min (width
/ 2 - 1, d
);
583 n
= (int) ((double) total_glyphs
/ width
* d
);
592 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
595 W is null if the function is called for a frame glyph matrix.
596 Otherwise it is the window MATRIX is a member of. X and Y are the
597 indices of the first column and row of MATRIX within the frame
598 matrix, if such a matrix exists. They are zero for purely
599 window-based redisplay. DIM is the needed size of the matrix.
601 In window-based redisplay, where no frame matrices exist, glyph
602 matrices manage their own glyph storage. Otherwise, they allocate
603 storage from a common frame glyph pool which can be found in
606 The reason for this memory management strategy is to avoid complete
607 frame redraws if possible. When we allocate from a common pool, a
608 change of the location or size of a sub-matrix within the pool
609 requires a complete redisplay of the frame because we cannot easily
610 make sure that the current matrices of all windows still agree with
611 what is displayed on the screen. While this is usually fast, it
612 leads to screen flickering. */
615 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
617 struct glyph_matrix
*matrix
;
623 int marginal_areas_changed_p
= 0;
624 int header_line_changed_p
= 0;
625 int header_line_p
= 0;
626 int left
= -1, right
= -1;
627 int window_width
= -1, window_height
;
629 /* See if W had a header line that has disappeared now, or vice versa.
633 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
635 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
636 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
638 matrix
->header_line_p
= header_line_p
;
640 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
641 Do nothing if MATRIX' size, position, vscroll, and marginal areas
642 haven't changed. This optimization is important because preserving
643 the matrix means preventing redisplay. */
644 if (matrix
->pool
== NULL
)
646 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
647 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
648 xassert (left
>= 0 && right
>= 0);
649 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
650 || right
!= matrix
->right_margin_glyphs
);
652 if (!marginal_areas_changed_p
654 && !header_line_changed_p
655 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
656 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
657 && matrix
->window_height
== window_height
658 && matrix
->window_vscroll
== w
->vscroll
659 && matrix
->window_width
== window_width
)
663 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
664 if (matrix
->rows_allocated
< dim
.height
)
666 int size
= dim
.height
* sizeof (struct glyph_row
);
667 new_rows
= dim
.height
- matrix
->rows_allocated
;
668 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
669 bzero (matrix
->rows
+ matrix
->rows_allocated
,
670 new_rows
* sizeof *matrix
->rows
);
671 matrix
->rows_allocated
= dim
.height
;
676 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
677 on a frame not using window-based redisplay. Set up pointers for
678 each row into the glyph pool. */
681 xassert (matrix
->pool
->glyphs
);
685 left
= margin_glyphs_to_reserve (w
, dim
.width
,
686 w
->left_margin_cols
);
687 right
= margin_glyphs_to_reserve (w
, dim
.width
,
688 w
->right_margin_cols
);
693 for (i
= 0; i
< dim
.height
; ++i
)
695 struct glyph_row
*row
= &matrix
->rows
[i
];
697 row
->glyphs
[LEFT_MARGIN_AREA
]
698 = (matrix
->pool
->glyphs
699 + (y
+ i
) * matrix
->pool
->ncolumns
703 || row
== matrix
->rows
+ dim
.height
- 1
704 || (row
== matrix
->rows
&& matrix
->header_line_p
))
706 row
->glyphs
[TEXT_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
];
708 row
->glyphs
[RIGHT_MARGIN_AREA
]
709 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
710 row
->glyphs
[LAST_AREA
]
711 = row
->glyphs
[RIGHT_MARGIN_AREA
];
715 row
->glyphs
[TEXT_AREA
]
716 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
717 row
->glyphs
[RIGHT_MARGIN_AREA
]
718 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
719 row
->glyphs
[LAST_AREA
]
720 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
724 matrix
->left_margin_glyphs
= left
;
725 matrix
->right_margin_glyphs
= right
;
729 /* If MATRIX->pool is null, MATRIX is responsible for managing
730 its own memory. It is a window matrix for window-based redisplay.
731 Allocate glyph memory from the heap. */
732 if (dim
.width
> matrix
->matrix_w
734 || header_line_changed_p
735 || marginal_areas_changed_p
)
737 struct glyph_row
*row
= matrix
->rows
;
738 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
742 row
->glyphs
[LEFT_MARGIN_AREA
]
743 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
745 * sizeof (struct glyph
)));
747 /* The mode line never has marginal areas. */
748 if (row
== matrix
->rows
+ dim
.height
- 1
749 || (row
== matrix
->rows
&& matrix
->header_line_p
))
751 row
->glyphs
[TEXT_AREA
]
752 = row
->glyphs
[LEFT_MARGIN_AREA
];
753 row
->glyphs
[RIGHT_MARGIN_AREA
]
754 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
755 row
->glyphs
[LAST_AREA
]
756 = row
->glyphs
[RIGHT_MARGIN_AREA
];
760 row
->glyphs
[TEXT_AREA
]
761 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
762 row
->glyphs
[RIGHT_MARGIN_AREA
]
763 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
764 row
->glyphs
[LAST_AREA
]
765 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
771 xassert (left
>= 0 && right
>= 0);
772 matrix
->left_margin_glyphs
= left
;
773 matrix
->right_margin_glyphs
= right
;
776 /* Number of rows to be used by MATRIX. */
777 matrix
->nrows
= dim
.height
;
778 xassert (matrix
->nrows
>= 0);
782 if (matrix
== w
->current_matrix
)
784 /* Mark rows in a current matrix of a window as not having
785 valid contents. It's important to not do this for
786 desired matrices. When Emacs starts, it may already be
787 building desired matrices when this function runs. */
788 if (window_width
< 0)
789 window_width
= window_box_width (w
, -1);
791 /* Optimize the case that only the height has changed (C-x 2,
792 upper window). Invalidate all rows that are no longer part
794 if (!marginal_areas_changed_p
795 && !header_line_changed_p
797 && dim
.width
== matrix
->matrix_w
798 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
799 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
800 && matrix
->window_width
== window_width
)
802 /* Find the last row in the window. */
803 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
804 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
810 /* Window end is invalid, if inside of the rows that
811 are invalidated below. */
812 if (INTEGERP (w
->window_end_vpos
)
813 && XFASTINT (w
->window_end_vpos
) >= i
)
814 w
->window_end_valid
= Qnil
;
816 while (i
< matrix
->nrows
)
817 matrix
->rows
[i
++].enabled_p
= 0;
821 for (i
= 0; i
< matrix
->nrows
; ++i
)
822 matrix
->rows
[i
].enabled_p
= 0;
825 else if (matrix
== w
->desired_matrix
)
827 /* Rows in desired matrices always have to be cleared;
828 redisplay expects this is the case when it runs, so it
829 had better be the case when we adjust matrices between
831 for (i
= 0; i
< matrix
->nrows
; ++i
)
832 matrix
->rows
[i
].enabled_p
= 0;
837 /* Remember last values to be able to optimize frame redraws. */
838 matrix
->matrix_x
= x
;
839 matrix
->matrix_y
= y
;
840 matrix
->matrix_w
= dim
.width
;
841 matrix
->matrix_h
= dim
.height
;
843 /* Record the top y location and height of W at the time the matrix
844 was last adjusted. This is used to optimize redisplay above. */
847 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
848 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
849 matrix
->window_height
= window_height
;
850 matrix
->window_width
= window_width
;
851 matrix
->window_vscroll
= w
->vscroll
;
856 /* Reverse the contents of rows in MATRIX between START and END. The
857 contents of the row at END - 1 end up at START, END - 2 at START +
858 1 etc. This is part of the implementation of rotate_matrix (see
862 reverse_rows (matrix
, start
, end
)
863 struct glyph_matrix
*matrix
;
868 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
870 /* Non-ISO HP/UX compiler doesn't like auto struct
872 struct glyph_row temp
;
873 temp
= matrix
->rows
[i
];
874 matrix
->rows
[i
] = matrix
->rows
[j
];
875 matrix
->rows
[j
] = temp
;
880 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
881 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
882 indices. (Note: this does not copy glyphs, only glyph pointers in
883 row structures are moved around).
885 The algorithm used for rotating the vector was, I believe, first
886 described by Kernighan. See the vector R as consisting of two
887 sub-vectors AB, where A has length BY for BY >= 0. The result
888 after rotating is then BA. Reverse both sub-vectors to get ArBr
889 and reverse the result to get (ArBr)r which is BA. Similar for
893 rotate_matrix (matrix
, first
, last
, by
)
894 struct glyph_matrix
*matrix
;
899 /* Up (rotate left, i.e. towards lower indices). */
901 reverse_rows (matrix
, first
, first
+ by
);
902 reverse_rows (matrix
, first
+ by
, last
);
903 reverse_rows (matrix
, first
, last
);
907 /* Down (rotate right, i.e. towards higher indices). */
908 reverse_rows (matrix
, last
- by
, last
);
909 reverse_rows (matrix
, first
, last
- by
);
910 reverse_rows (matrix
, first
, last
);
915 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
916 with indices START <= index < END. Increment positions by DELTA/
920 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
921 struct glyph_matrix
*matrix
;
922 int start
, end
, delta
, delta_bytes
;
924 /* Check that START and END are reasonable values. */
925 xassert (start
>= 0 && start
<= matrix
->nrows
);
926 xassert (end
>= 0 && end
<= matrix
->nrows
);
927 xassert (start
<= end
);
929 for (; start
< end
; ++start
)
930 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
934 /* Enable a range of rows in glyph matrix MATRIX. START and END are
935 the row indices of the first and last + 1 row to enable. If
936 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
939 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
940 struct glyph_matrix
*matrix
;
944 xassert (start
<= end
);
945 xassert (start
>= 0 && start
< matrix
->nrows
);
946 xassert (end
>= 0 && end
<= matrix
->nrows
);
948 for (; start
< end
; ++start
)
949 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
955 This empties all rows in MATRIX by setting the enabled_p flag for
956 all rows of the matrix to zero. The function prepare_desired_row
957 will eventually really clear a row when it sees one with a zero
960 Resets update hints to defaults value. The only update hint
961 currently present is the flag MATRIX->no_scrolling_p. */
964 clear_glyph_matrix (matrix
)
965 struct glyph_matrix
*matrix
;
969 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
970 matrix
->no_scrolling_p
= 0;
975 /* Shift part of the glyph matrix MATRIX of window W up or down.
976 Increment y-positions in glyph rows between START and END by DY,
977 and recompute their visible height. */
980 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
982 struct glyph_matrix
*matrix
;
987 xassert (start
<= end
);
988 xassert (start
>= 0 && start
< matrix
->nrows
);
989 xassert (end
>= 0 && end
<= matrix
->nrows
);
991 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
992 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
994 for (; start
< end
; ++start
)
996 struct glyph_row
*row
= &matrix
->rows
[start
];
999 row
->visible_height
= row
->height
;
1002 row
->visible_height
-= min_y
- row
->y
;
1003 if (row
->y
+ row
->height
> max_y
)
1004 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1009 /* Mark all rows in current matrices of frame F as invalid. Marking
1010 invalid is done by setting enabled_p to zero for all rows in a
1014 clear_current_matrices (f
)
1015 register struct frame
*f
;
1017 /* Clear frame current matrix, if we have one. */
1018 if (f
->current_matrix
)
1019 clear_glyph_matrix (f
->current_matrix
);
1021 /* Clear the matrix of the menu bar window, if such a window exists.
1022 The menu bar window is currently used to display menus on X when
1023 no toolkit support is compiled in. */
1024 if (WINDOWP (f
->menu_bar_window
))
1025 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1027 /* Clear the matrix of the tool-bar window, if any. */
1028 if (WINDOWP (f
->tool_bar_window
))
1029 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1031 /* Clear current window matrices. */
1032 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1033 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1037 /* Clear out all display lines of F for a coming redisplay. */
1040 clear_desired_matrices (f
)
1041 register struct frame
*f
;
1043 if (f
->desired_matrix
)
1044 clear_glyph_matrix (f
->desired_matrix
);
1046 if (WINDOWP (f
->menu_bar_window
))
1047 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1049 if (WINDOWP (f
->tool_bar_window
))
1050 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1052 /* Do it for window matrices. */
1053 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1054 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1058 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1059 non-zero clear desired matrices, otherwise clear current matrices. */
1062 clear_window_matrices (w
, desired_p
)
1068 if (!NILP (w
->hchild
))
1070 xassert (WINDOWP (w
->hchild
));
1071 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1073 else if (!NILP (w
->vchild
))
1075 xassert (WINDOWP (w
->vchild
));
1076 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1081 clear_glyph_matrix (w
->desired_matrix
);
1084 clear_glyph_matrix (w
->current_matrix
);
1085 w
->window_end_valid
= Qnil
;
1089 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1095 /***********************************************************************
1098 See dispextern.h for an overall explanation of glyph rows.
1099 ***********************************************************************/
1101 /* Clear glyph row ROW. Do it in a way that makes it robust against
1102 changes in the glyph_row structure, i.e. addition or removal of
1103 structure members. */
1105 static struct glyph_row null_row
;
1108 clear_glyph_row (row
)
1109 struct glyph_row
*row
;
1111 struct glyph
*p
[1 + LAST_AREA
];
1113 /* Save pointers. */
1114 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1115 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1116 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1117 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1122 /* Restore pointers. */
1123 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1124 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1125 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1126 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1128 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1129 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1130 Redisplay outputs such glyphs, and flickering effects were
1131 the result. This also depended on the contents of memory
1132 returned by xmalloc. If flickering happens again, activate
1133 the code below. If the flickering is gone with that, chances
1134 are that the flickering has the same reason as here. */
1135 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1140 /* Make ROW an empty, enabled row of canonical character height,
1141 in window W starting at y-position Y. */
1144 blank_row (w
, row
, y
)
1146 struct glyph_row
*row
;
1151 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1152 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1154 clear_glyph_row (row
);
1156 row
->ascent
= row
->phys_ascent
= 0;
1157 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1158 row
->visible_height
= row
->height
;
1161 row
->visible_height
-= min_y
- row
->y
;
1162 if (row
->y
+ row
->height
> max_y
)
1163 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1169 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1170 are the amounts by which to change positions. Note that the first
1171 glyph of the text area of a row can have a buffer position even if
1172 the used count of the text area is zero. Such rows display line
1176 increment_row_positions (row
, delta
, delta_bytes
)
1177 struct glyph_row
*row
;
1178 int delta
, delta_bytes
;
1182 /* Increment start and end positions. */
1183 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1184 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1185 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1186 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1188 /* Increment positions in glyphs. */
1189 for (area
= 0; area
< LAST_AREA
; ++area
)
1190 for (i
= 0; i
< row
->used
[area
]; ++i
)
1191 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1192 && row
->glyphs
[area
][i
].charpos
> 0)
1193 row
->glyphs
[area
][i
].charpos
+= delta
;
1195 /* Capture the case of rows displaying a line end. */
1196 if (row
->used
[TEXT_AREA
] == 0
1197 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1198 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1203 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1204 contents, i.e. glyph structure contents are exchanged between A and
1205 B without changing glyph pointers in A and B. */
1208 swap_glyphs_in_rows (a
, b
)
1209 struct glyph_row
*a
, *b
;
1213 for (area
= 0; area
< LAST_AREA
; ++area
)
1215 /* Number of glyphs to swap. */
1216 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1218 /* Start of glyphs in area of row A. */
1219 struct glyph
*glyph_a
= a
->glyphs
[area
];
1221 /* End + 1 of glyphs in area of row A. */
1222 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1224 /* Start of glyphs in area of row B. */
1225 struct glyph
*glyph_b
= b
->glyphs
[area
];
1227 while (glyph_a
< glyph_a_end
)
1229 /* Non-ISO HP/UX compiler doesn't like auto struct
1233 *glyph_a
= *glyph_b
;
1243 /* Exchange pointers to glyph memory between glyph rows A and B. */
1246 swap_glyph_pointers (a
, b
)
1247 struct glyph_row
*a
, *b
;
1250 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1252 struct glyph
*temp
= a
->glyphs
[i
];
1253 a
->glyphs
[i
] = b
->glyphs
[i
];
1254 b
->glyphs
[i
] = temp
;
1259 /* Copy glyph row structure FROM to glyph row structure TO, except
1260 that glyph pointers in the structures are left unchanged. */
1263 copy_row_except_pointers (to
, from
)
1264 struct glyph_row
*to
, *from
;
1266 struct glyph
*pointers
[1 + LAST_AREA
];
1268 /* Save glyph pointers of TO. */
1269 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1271 /* Do a structure assignment. */
1274 /* Restore original pointers of TO. */
1275 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1279 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1280 TO and FROM are left unchanged. Glyph contents are copied from the
1281 glyph memory of FROM to the glyph memory of TO. Increment buffer
1282 positions in row TO by DELTA/ DELTA_BYTES. */
1285 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1286 struct glyph_row
*to
, *from
;
1287 int delta
, delta_bytes
;
1291 /* This is like a structure assignment TO = FROM, except that
1292 glyph pointers in the rows are left unchanged. */
1293 copy_row_except_pointers (to
, from
);
1295 /* Copy glyphs from FROM to TO. */
1296 for (area
= 0; area
< LAST_AREA
; ++area
)
1297 if (from
->used
[area
])
1298 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1299 from
->used
[area
] * sizeof (struct glyph
));
1301 /* Increment buffer positions in TO by DELTA. */
1302 increment_row_positions (to
, delta
, delta_bytes
);
1306 /* Assign glyph row FROM to glyph row TO. This works like a structure
1307 assignment TO = FROM, except that glyph pointers are not copied but
1308 exchanged between TO and FROM. Pointers must be exchanged to avoid
1312 assign_row (to
, from
)
1313 struct glyph_row
*to
, *from
;
1315 swap_glyph_pointers (to
, from
);
1316 copy_row_except_pointers (to
, from
);
1320 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1321 a row in a window matrix, is a slice of the glyph memory of the
1322 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1323 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1324 memory of FRAME_ROW. */
1329 glyph_row_slice_p (window_row
, frame_row
)
1330 struct glyph_row
*window_row
, *frame_row
;
1332 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1333 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1334 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1336 return (frame_glyph_start
<= window_glyph_start
1337 && window_glyph_start
< frame_glyph_end
);
1340 #endif /* GLYPH_DEBUG */
1344 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1345 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1346 in WINDOW_MATRIX is found satisfying the condition. */
1348 static struct glyph_row
*
1349 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1350 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1355 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1357 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1358 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1359 frame_matrix
->rows
+ row
))
1362 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1367 /* Prepare ROW for display. Desired rows are cleared lazily,
1368 i.e. they are only marked as to be cleared by setting their
1369 enabled_p flag to zero. When a row is to be displayed, a prior
1370 call to this function really clears it. */
1373 prepare_desired_row (row
)
1374 struct glyph_row
*row
;
1376 if (!row
->enabled_p
)
1378 clear_glyph_row (row
);
1384 /* Return a hash code for glyph row ROW. */
1387 line_hash_code (row
)
1388 struct glyph_row
*row
;
1394 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1395 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1399 int c
= glyph
->u
.ch
;
1400 int face_id
= glyph
->face_id
;
1401 if (must_write_spaces
)
1403 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1404 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1416 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1417 the number of characters in the line. If must_write_spaces is
1418 zero, leading and trailing spaces are ignored. */
1421 line_draw_cost (matrix
, vpos
)
1422 struct glyph_matrix
*matrix
;
1425 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1426 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1427 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1429 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1430 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1432 /* Ignore trailing and leading spaces if we can. */
1433 if (!must_write_spaces
)
1435 /* Skip from the end over trailing spaces. */
1436 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1439 /* All blank line. */
1443 /* Skip over leading spaces. */
1444 while (CHAR_GLYPH_SPACE_P (*beg
))
1448 /* If we don't have a glyph-table, each glyph is one character,
1449 so return the number of glyphs. */
1450 if (glyph_table_base
== 0)
1454 /* Otherwise, scan the glyphs and accumulate their total length
1459 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1462 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1465 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1475 /* Test two glyph rows A and B for equality. Value is non-zero if A
1476 and B have equal contents. W is the window to which the glyphs
1477 rows A and B belong. It is needed here to test for partial row
1478 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1479 flags of A and B, too. */
1482 row_equal_p (w
, a
, b
, mouse_face_p
)
1484 struct glyph_row
*a
, *b
;
1489 else if (a
->hash
!= b
->hash
)
1493 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1496 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1499 /* Compare glyphs. */
1500 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1502 if (a
->used
[area
] != b
->used
[area
])
1505 a_glyph
= a
->glyphs
[area
];
1506 a_end
= a_glyph
+ a
->used
[area
];
1507 b_glyph
= b
->glyphs
[area
];
1509 while (a_glyph
< a_end
1510 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1511 ++a_glyph
, ++b_glyph
;
1513 if (a_glyph
!= a_end
)
1517 if (a
->fill_line_p
!= b
->fill_line_p
1518 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1519 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1520 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1521 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1522 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1523 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1524 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1525 || a
->overlapped_p
!= b
->overlapped_p
1526 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1527 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1528 /* Different partially visible characters on left margin. */
1530 /* Different height. */
1531 || a
->ascent
!= b
->ascent
1532 || a
->phys_ascent
!= b
->phys_ascent
1533 || a
->phys_height
!= b
->phys_height
1534 || a
->visible_height
!= b
->visible_height
)
1543 /***********************************************************************
1546 See dispextern.h for an overall explanation of glyph pools.
1547 ***********************************************************************/
1549 /* Allocate a glyph_pool structure. The structure returned is
1550 initialized with zeros. The global variable glyph_pool_count is
1551 incremented for each pool allocated. */
1553 static struct glyph_pool
*
1556 struct glyph_pool
*result
;
1558 /* Allocate a new glyph_pool and clear it. */
1559 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1560 bzero (result
, sizeof *result
);
1562 /* For memory leak and double deletion checking. */
1569 /* Free a glyph_pool structure POOL. The function may be called with
1570 a null POOL pointer. The global variable glyph_pool_count is
1571 decremented with every pool structure freed. If this count gets
1572 negative, more structures were freed than allocated, i.e. one
1573 structure must have been freed more than once or a bogus pointer
1574 was passed to free_glyph_pool. */
1577 free_glyph_pool (pool
)
1578 struct glyph_pool
*pool
;
1582 /* More freed than allocated? */
1584 xassert (glyph_pool_count
>= 0);
1586 xfree (pool
->glyphs
);
1592 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1593 columns we need. This function never shrinks a pool. The only
1594 case in which this would make sense, would be when a frame's size
1595 is changed from a large value to a smaller one. But, if someone
1596 does it once, we can expect that he will do it again.
1598 Value is non-zero if the pool changed in a way which makes
1599 re-adjusting window glyph matrices necessary. */
1602 realloc_glyph_pool (pool
, matrix_dim
)
1603 struct glyph_pool
*pool
;
1604 struct dim matrix_dim
;
1609 changed_p
= (pool
->glyphs
== 0
1610 || matrix_dim
.height
!= pool
->nrows
1611 || matrix_dim
.width
!= pool
->ncolumns
);
1613 /* Enlarge the glyph pool. */
1614 needed
= matrix_dim
.width
* matrix_dim
.height
;
1615 if (needed
> pool
->nglyphs
)
1617 int size
= needed
* sizeof (struct glyph
);
1620 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1623 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1624 bzero (pool
->glyphs
, size
);
1627 pool
->nglyphs
= needed
;
1630 /* Remember the number of rows and columns because (a) we use them
1631 to do sanity checks, and (b) the number of columns determines
1632 where rows in the frame matrix start---this must be available to
1633 determine pointers to rows of window sub-matrices. */
1634 pool
->nrows
= matrix_dim
.height
;
1635 pool
->ncolumns
= matrix_dim
.width
;
1642 /***********************************************************************
1644 ***********************************************************************/
1649 /* Flush standard output. This is sometimes useful to call from
1659 /* Check that no glyph pointers have been lost in MATRIX. If a
1660 pointer has been lost, e.g. by using a structure assignment between
1661 rows, at least one pointer must occur more than once in the rows of
1665 check_matrix_pointer_lossage (matrix
)
1666 struct glyph_matrix
*matrix
;
1670 for (i
= 0; i
< matrix
->nrows
; ++i
)
1671 for (j
= 0; j
< matrix
->nrows
; ++j
)
1673 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1674 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1678 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1681 matrix_row (matrix
, row
)
1682 struct glyph_matrix
*matrix
;
1685 xassert (matrix
&& matrix
->rows
);
1686 xassert (row
>= 0 && row
< matrix
->nrows
);
1688 /* That's really too slow for normal testing because this function
1689 is called almost everywhere. Although---it's still astonishingly
1690 fast, so it is valuable to have for debugging purposes. */
1692 check_matrix_pointer_lossage (matrix
);
1695 return matrix
->rows
+ row
;
1699 #if 0 /* This function makes invalid assumptions when text is
1700 partially invisible. But it might come handy for debugging
1703 /* Check invariants that must hold for an up to date current matrix of
1707 check_matrix_invariants (w
)
1710 struct glyph_matrix
*matrix
= w
->current_matrix
;
1711 int yb
= window_text_bottom_y (w
);
1712 struct glyph_row
*row
= matrix
->rows
;
1713 struct glyph_row
*last_text_row
= NULL
;
1714 struct buffer
*saved
= current_buffer
;
1715 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1718 /* This can sometimes happen for a fresh window. */
1719 if (matrix
->nrows
< 2)
1722 set_buffer_temp (buffer
);
1724 /* Note: last row is always reserved for the mode line. */
1725 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1726 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1728 struct glyph_row
*next
= row
+ 1;
1730 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1731 last_text_row
= row
;
1733 /* Check that character and byte positions are in sync. */
1734 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1735 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1737 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1738 have such a position temporarily in case of a minibuffer
1739 displaying something like `[Sole completion]' at its end. */
1740 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1741 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1742 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1744 /* Check that end position of `row' is equal to start position
1746 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1748 xassert (MATRIX_ROW_END_CHARPOS (row
)
1749 == MATRIX_ROW_START_CHARPOS (next
));
1750 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1751 == MATRIX_ROW_START_BYTEPOS (next
));
1756 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1757 xassert (w
->desired_matrix
->rows
!= NULL
);
1758 set_buffer_temp (saved
);
1763 #endif /* GLYPH_DEBUG != 0 */
1767 /**********************************************************************
1768 Allocating/ Adjusting Glyph Matrices
1769 **********************************************************************/
1771 /* Allocate glyph matrices over a window tree for a frame-based
1774 X and Y are column/row within the frame glyph matrix where
1775 sub-matrices for the window tree rooted at WINDOW must be
1776 allocated. CH_DIM contains the dimensions of the smallest
1777 character that could be used during display. DIM_ONLY_P non-zero
1778 means that the caller of this function is only interested in the
1779 result matrix dimension, and matrix adjustments should not be
1782 The function returns the total width/height of the sub-matrices of
1783 the window tree. If called on a frame root window, the computation
1784 will take the mini-buffer window into account.
1786 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1788 NEW_LEAF_MATRIX set if any window in the tree did not have a
1789 glyph matrices yet, and
1791 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1792 any window in the tree will be changed or have been changed (see
1795 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1798 Windows are arranged into chains of windows on the same level
1799 through the next fields of window structures. Such a level can be
1800 either a sequence of horizontally adjacent windows from left to
1801 right, or a sequence of vertically adjacent windows from top to
1802 bottom. Each window in a horizontal sequence can be either a leaf
1803 window or a vertical sequence; a window in a vertical sequence can
1804 be either a leaf or a horizontal sequence. All windows in a
1805 horizontal sequence have the same height, and all windows in a
1806 vertical sequence have the same width.
1808 This function uses, for historical reasons, a more general
1809 algorithm to determine glyph matrix dimensions that would be
1812 The matrix height of a horizontal sequence is determined by the
1813 maximum height of any matrix in the sequence. The matrix width of
1814 a horizontal sequence is computed by adding up matrix widths of
1815 windows in the sequence.
1817 |<------- result width ------->|
1818 +---------+----------+---------+ ---
1821 +---------+ | | result height
1826 The matrix width of a vertical sequence is the maximum matrix width
1827 of any window in the sequence. Its height is computed by adding up
1828 matrix heights of windows in the sequence.
1830 |<---- result width -->|
1838 +------------+---------+ |
1841 +------------+---------+ --- */
1843 /* Bit indicating that a new matrix will be allocated or has been
1846 #define NEW_LEAF_MATRIX (1 << 0)
1848 /* Bit indicating that a matrix will or has changed its location or
1851 #define CHANGED_LEAF_MATRIX (1 << 1)
1854 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1855 window_change_flags
)
1859 int *window_change_flags
;
1861 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1863 int wmax
= 0, hmax
= 0;
1867 int in_horz_combination_p
;
1869 /* What combination is WINDOW part of? Compute this once since the
1870 result is the same for all windows in the `next' chain. The
1871 special case of a root window (parent equal to nil) is treated
1872 like a vertical combination because a root window's `next'
1873 points to the mini-buffer window, if any, which is arranged
1874 vertically below other windows. */
1875 in_horz_combination_p
1876 = (!NILP (XWINDOW (window
)->parent
)
1877 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1879 /* For WINDOW and all windows on the same level. */
1882 w
= XWINDOW (window
);
1884 /* Get the dimension of the window sub-matrix for W, depending
1885 on whether this is a combination or a leaf window. */
1886 if (!NILP (w
->hchild
))
1887 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1889 window_change_flags
);
1890 else if (!NILP (w
->vchild
))
1891 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1893 window_change_flags
);
1896 /* If not already done, allocate sub-matrix structures. */
1897 if (w
->desired_matrix
== NULL
)
1899 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1900 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1901 *window_change_flags
|= NEW_LEAF_MATRIX
;
1904 /* Width and height MUST be chosen so that there are no
1905 holes in the frame matrix. */
1906 dim
.width
= required_matrix_width (w
);
1907 dim
.height
= required_matrix_height (w
);
1909 /* Will matrix be re-allocated? */
1910 if (x
!= w
->desired_matrix
->matrix_x
1911 || y
!= w
->desired_matrix
->matrix_y
1912 || dim
.width
!= w
->desired_matrix
->matrix_w
1913 || dim
.height
!= w
->desired_matrix
->matrix_h
1914 || (margin_glyphs_to_reserve (w
, dim
.width
,
1915 w
->left_margin_cols
)
1916 != w
->desired_matrix
->left_margin_glyphs
)
1917 || (margin_glyphs_to_reserve (w
, dim
.width
,
1918 w
->right_margin_cols
)
1919 != w
->desired_matrix
->right_margin_glyphs
))
1920 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1922 /* Actually change matrices, if allowed. Do not consider
1923 CHANGED_LEAF_MATRIX computed above here because the pool
1924 may have been changed which we don't now here. We trust
1925 that we only will be called with DIM_ONLY_P != 0 when
1929 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1930 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1934 /* If we are part of a horizontal combination, advance x for
1935 windows to the right of W; otherwise advance y for windows
1937 if (in_horz_combination_p
)
1942 /* Remember maximum glyph matrix dimensions. */
1943 wmax
= max (wmax
, dim
.width
);
1944 hmax
= max (hmax
, dim
.height
);
1946 /* Next window on same level. */
1949 while (!NILP (window
));
1951 /* Set `total' to the total glyph matrix dimension of this window
1952 level. In a vertical combination, the width is the width of the
1953 widest window; the height is the y we finally reached, corrected
1954 by the y we started with. In a horizontal combination, the total
1955 height is the height of the tallest window, and the width is the
1956 x we finally reached, corrected by the x we started with. */
1957 if (in_horz_combination_p
)
1959 total
.width
= x
- x0
;
1960 total
.height
= hmax
;
1965 total
.height
= y
- y0
;
1972 /* Return the required height of glyph matrices for window W. */
1975 required_matrix_height (w
)
1978 #ifdef HAVE_WINDOW_SYSTEM
1979 struct frame
*f
= XFRAME (w
->frame
);
1981 if (FRAME_WINDOW_P (f
))
1983 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1984 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1985 return (((window_pixel_height
+ ch_height
- 1)
1986 / ch_height
) * w
->nrows_scale_factor
1987 /* One partially visible line at the top and
1988 bottom of the window. */
1990 /* 2 for header and mode line. */
1993 #endif /* HAVE_WINDOW_SYSTEM */
1995 return WINDOW_TOTAL_LINES (w
);
1999 /* Return the required width of glyph matrices for window W. */
2002 required_matrix_width (w
)
2005 #ifdef HAVE_WINDOW_SYSTEM
2006 struct frame
*f
= XFRAME (w
->frame
);
2007 if (FRAME_WINDOW_P (f
))
2009 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2010 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2012 /* Compute number of glyphs needed in a glyph row. */
2013 return (((window_pixel_width
+ ch_width
- 1)
2014 / ch_width
) * w
->ncols_scale_factor
2015 /* 2 partially visible columns in the text area. */
2017 /* One partially visible column at the right
2018 edge of each marginal area. */
2021 #endif /* HAVE_WINDOW_SYSTEM */
2023 return XINT (w
->total_cols
);
2027 /* Allocate window matrices for window-based redisplay. W is the
2028 window whose matrices must be allocated/reallocated. CH_DIM is the
2029 size of the smallest character that could potentially be used on W. */
2032 allocate_matrices_for_window_redisplay (w
)
2037 if (!NILP (w
->vchild
))
2038 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2039 else if (!NILP (w
->hchild
))
2040 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2043 /* W is a leaf window. */
2046 /* If matrices are not yet allocated, allocate them now. */
2047 if (w
->desired_matrix
== NULL
)
2049 w
->desired_matrix
= new_glyph_matrix (NULL
);
2050 w
->current_matrix
= new_glyph_matrix (NULL
);
2053 dim
.width
= required_matrix_width (w
);
2054 dim
.height
= required_matrix_height (w
);
2055 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2056 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2059 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2064 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2065 do it for all frames; otherwise do it just for the given frame.
2066 This function must be called when a new frame is created, its size
2067 changes, or its window configuration changes. */
2073 /* Block input so that expose events and other events that access
2074 glyph matrices are not processed while we are changing them. */
2078 adjust_frame_glyphs (f
);
2081 Lisp_Object tail
, lisp_frame
;
2083 FOR_EACH_FRAME (tail
, lisp_frame
)
2084 adjust_frame_glyphs (XFRAME (lisp_frame
));
2091 /* Adjust frame glyphs when Emacs is initialized.
2093 To be called from init_display.
2095 We need a glyph matrix because redraw will happen soon.
2096 Unfortunately, window sizes on selected_frame are not yet set to
2097 meaningful values. I believe we can assume that there are only two
2098 windows on the frame---the mini-buffer and the root window. Frame
2099 height and width seem to be correct so far. So, set the sizes of
2100 windows to estimated values. */
2103 adjust_frame_glyphs_initially ()
2105 struct frame
*sf
= SELECTED_FRAME ();
2106 struct window
*root
= XWINDOW (sf
->root_window
);
2107 struct window
*mini
= XWINDOW (root
->next
);
2108 int frame_lines
= FRAME_LINES (sf
);
2109 int frame_cols
= FRAME_COLS (sf
);
2110 int top_margin
= FRAME_TOP_MARGIN (sf
);
2112 /* Do it for the root window. */
2113 XSETFASTINT (root
->top_line
, top_margin
);
2114 XSETFASTINT (root
->total_cols
, frame_cols
);
2115 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2117 /* Do it for the mini-buffer window. */
2118 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2119 XSETFASTINT (mini
->total_cols
, frame_cols
);
2120 set_window_height (root
->next
, 1, 0);
2122 adjust_frame_glyphs (sf
);
2123 glyphs_initialized_initially_p
= 1;
2127 /* Allocate/reallocate glyph matrices of a single frame F. */
2130 adjust_frame_glyphs (f
)
2133 if (FRAME_WINDOW_P (f
))
2134 adjust_frame_glyphs_for_window_redisplay (f
);
2136 adjust_frame_glyphs_for_frame_redisplay (f
);
2138 /* Don't forget the message buffer and the buffer for
2139 decode_mode_spec. */
2140 adjust_frame_message_buffer (f
);
2141 adjust_decode_mode_spec_buffer (f
);
2143 f
->glyphs_initialized_p
= 1;
2147 /* In the window tree with root W, build current matrices of leaf
2148 windows from the frame's current matrix. */
2151 fake_current_matrices (window
)
2156 for (; !NILP (window
); window
= w
->next
)
2158 w
= XWINDOW (window
);
2160 if (!NILP (w
->hchild
))
2161 fake_current_matrices (w
->hchild
);
2162 else if (!NILP (w
->vchild
))
2163 fake_current_matrices (w
->vchild
);
2167 struct frame
*f
= XFRAME (w
->frame
);
2168 struct glyph_matrix
*m
= w
->current_matrix
;
2169 struct glyph_matrix
*fm
= f
->current_matrix
;
2171 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2172 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2174 for (i
= 0; i
< m
->matrix_h
; ++i
)
2176 struct glyph_row
*r
= m
->rows
+ i
;
2177 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2179 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2180 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2182 r
->enabled_p
= fr
->enabled_p
;
2185 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2186 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2187 r
->used
[TEXT_AREA
] = (m
->matrix_w
2188 - r
->used
[LEFT_MARGIN_AREA
]
2189 - r
->used
[RIGHT_MARGIN_AREA
]);
2198 /* Save away the contents of frame F's current frame matrix. Value is
2199 a glyph matrix holding the contents of F's current frame matrix. */
2201 static struct glyph_matrix
*
2202 save_current_matrix (f
)
2206 struct glyph_matrix
*saved
;
2208 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2209 bzero (saved
, sizeof *saved
);
2210 saved
->nrows
= f
->current_matrix
->nrows
;
2211 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2212 * sizeof *saved
->rows
);
2213 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2215 for (i
= 0; i
< saved
->nrows
; ++i
)
2217 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2218 struct glyph_row
*to
= saved
->rows
+ i
;
2219 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2220 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2221 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2222 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2229 /* Restore the contents of frame F's current frame matrix from SAVED,
2230 and free memory associated with SAVED. */
2233 restore_current_matrix (f
, saved
)
2235 struct glyph_matrix
*saved
;
2239 for (i
= 0; i
< saved
->nrows
; ++i
)
2241 struct glyph_row
*from
= saved
->rows
+ i
;
2242 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2243 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2244 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2245 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2246 xfree (from
->glyphs
[TEXT_AREA
]);
2249 xfree (saved
->rows
);
2255 /* Allocate/reallocate glyph matrices of a single frame F for
2256 frame-based redisplay. */
2259 adjust_frame_glyphs_for_frame_redisplay (f
)
2263 struct dim matrix_dim
;
2265 int window_change_flags
;
2268 if (!FRAME_LIVE_P (f
))
2271 /* Determine the smallest character in any font for F. On
2272 console windows, all characters have dimension (1, 1). */
2273 ch_dim
.width
= ch_dim
.height
= 1;
2275 top_window_y
= FRAME_TOP_MARGIN (f
);
2277 /* Allocate glyph pool structures if not already done. */
2278 if (f
->desired_pool
== NULL
)
2280 f
->desired_pool
= new_glyph_pool ();
2281 f
->current_pool
= new_glyph_pool ();
2284 /* Allocate frames matrix structures if needed. */
2285 if (f
->desired_matrix
== NULL
)
2287 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2288 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2291 /* Compute window glyph matrices. (This takes the mini-buffer
2292 window into account). The result is the size of the frame glyph
2293 matrix needed. The variable window_change_flags is set to a bit
2294 mask indicating whether new matrices will be allocated or
2295 existing matrices change their size or location within the frame
2297 window_change_flags
= 0;
2299 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2302 &window_change_flags
);
2304 /* Add in menu bar lines, if any. */
2305 matrix_dim
.height
+= top_window_y
;
2307 /* Enlarge pools as necessary. */
2308 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2309 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2311 /* Set up glyph pointers within window matrices. Do this only if
2312 absolutely necessary since it requires a frame redraw. */
2313 if (pool_changed_p
|| window_change_flags
)
2315 /* Do it for window matrices. */
2316 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2318 &window_change_flags
);
2320 /* Size of frame matrices must equal size of frame. Note
2321 that we are called for X frames with window widths NOT equal
2322 to the frame width (from CHANGE_FRAME_SIZE_1). */
2323 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2324 && matrix_dim
.height
== FRAME_LINES (f
));
2326 /* Pointers to glyph memory in glyph rows are exchanged during
2327 the update phase of redisplay, which means in general that a
2328 frame's current matrix consists of pointers into both the
2329 desired and current glyph pool of the frame. Adjusting a
2330 matrix sets the frame matrix up so that pointers are all into
2331 the same pool. If we want to preserve glyph contents of the
2332 current matrix over a call to adjust_glyph_matrix, we must
2333 make a copy of the current glyphs, and restore the current
2334 matrix' contents from that copy. */
2335 if (display_completed
2336 && !FRAME_GARBAGED_P (f
)
2337 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2338 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2340 struct glyph_matrix
*copy
= save_current_matrix (f
);
2341 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2342 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2343 restore_current_matrix (f
, copy
);
2344 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2348 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2349 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2350 SET_FRAME_GARBAGED (f
);
2356 /* Allocate/reallocate glyph matrices of a single frame F for
2357 window-based redisplay. */
2360 adjust_frame_glyphs_for_window_redisplay (f
)
2366 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2368 /* Get minimum sizes. */
2369 #ifdef HAVE_WINDOW_SYSTEM
2370 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2371 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2373 ch_dim
.width
= ch_dim
.height
= 1;
2376 /* Allocate/reallocate window matrices. */
2377 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2379 /* Allocate/ reallocate matrices of the dummy window used to display
2380 the menu bar under X when no X toolkit support is available. */
2381 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2383 /* Allocate a dummy window if not already done. */
2384 if (NILP (f
->menu_bar_window
))
2386 f
->menu_bar_window
= make_window ();
2387 w
= XWINDOW (f
->menu_bar_window
);
2388 XSETFRAME (w
->frame
, f
);
2389 w
->pseudo_window_p
= 1;
2392 w
= XWINDOW (f
->menu_bar_window
);
2394 /* Set window dimensions to frame dimensions and allocate or
2395 adjust glyph matrices of W. */
2396 XSETFASTINT (w
->top_line
, 0);
2397 XSETFASTINT (w
->left_col
, 0);
2398 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2399 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2400 allocate_matrices_for_window_redisplay (w
);
2402 #endif /* not USE_X_TOOLKIT */
2405 /* Allocate/ reallocate matrices of the tool bar window. If we
2406 don't have a tool bar window yet, make one. */
2407 if (NILP (f
->tool_bar_window
))
2409 f
->tool_bar_window
= make_window ();
2410 w
= XWINDOW (f
->tool_bar_window
);
2411 XSETFRAME (w
->frame
, f
);
2412 w
->pseudo_window_p
= 1;
2415 w
= XWINDOW (f
->tool_bar_window
);
2417 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2418 XSETFASTINT (w
->left_col
, 0);
2419 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2420 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2421 allocate_matrices_for_window_redisplay (w
);
2426 /* Adjust/ allocate message buffer of frame F.
2428 Note that the message buffer is never freed. Since I could not
2429 find a free in 19.34, I assume that freeing it would be
2430 problematic in some way and don't do it either.
2432 (Implementation note: It should be checked if we can free it
2433 eventually without causing trouble). */
2436 adjust_frame_message_buffer (f
)
2439 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2441 if (FRAME_MESSAGE_BUF (f
))
2443 char *buffer
= FRAME_MESSAGE_BUF (f
);
2444 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2445 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2448 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2452 /* Re-allocate buffer for decode_mode_spec on frame F. */
2455 adjust_decode_mode_spec_buffer (f
)
2458 f
->decode_mode_spec_buffer
2459 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2460 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2465 /**********************************************************************
2466 Freeing Glyph Matrices
2467 **********************************************************************/
2469 /* Free glyph memory for a frame F. F may be null. This function can
2470 be called for the same frame more than once. The root window of
2471 F may be nil when this function is called. This is the case when
2472 the function is called when F is destroyed. */
2478 if (f
&& f
->glyphs_initialized_p
)
2480 /* Block interrupt input so that we don't get surprised by an X
2481 event while we're in an inconsistent state. */
2483 f
->glyphs_initialized_p
= 0;
2485 /* Release window sub-matrices. */
2486 if (!NILP (f
->root_window
))
2487 free_window_matrices (XWINDOW (f
->root_window
));
2489 /* Free the dummy window for menu bars without X toolkit and its
2491 if (!NILP (f
->menu_bar_window
))
2493 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2494 free_glyph_matrix (w
->desired_matrix
);
2495 free_glyph_matrix (w
->current_matrix
);
2496 w
->desired_matrix
= w
->current_matrix
= NULL
;
2497 f
->menu_bar_window
= Qnil
;
2500 /* Free the tool bar window and its glyph matrices. */
2501 if (!NILP (f
->tool_bar_window
))
2503 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2504 free_glyph_matrix (w
->desired_matrix
);
2505 free_glyph_matrix (w
->current_matrix
);
2506 w
->desired_matrix
= w
->current_matrix
= NULL
;
2507 f
->tool_bar_window
= Qnil
;
2510 /* Release frame glyph matrices. Reset fields to zero in
2511 case we are called a second time. */
2512 if (f
->desired_matrix
)
2514 free_glyph_matrix (f
->desired_matrix
);
2515 free_glyph_matrix (f
->current_matrix
);
2516 f
->desired_matrix
= f
->current_matrix
= NULL
;
2519 /* Release glyph pools. */
2520 if (f
->desired_pool
)
2522 free_glyph_pool (f
->desired_pool
);
2523 free_glyph_pool (f
->current_pool
);
2524 f
->desired_pool
= f
->current_pool
= NULL
;
2532 /* Free glyph sub-matrices in the window tree rooted at W. This
2533 function may be called with a null pointer, and it may be called on
2534 the same tree more than once. */
2537 free_window_matrices (w
)
2542 if (!NILP (w
->hchild
))
2543 free_window_matrices (XWINDOW (w
->hchild
));
2544 else if (!NILP (w
->vchild
))
2545 free_window_matrices (XWINDOW (w
->vchild
));
2548 /* This is a leaf window. Free its memory and reset fields
2549 to zero in case this function is called a second time for
2551 free_glyph_matrix (w
->current_matrix
);
2552 free_glyph_matrix (w
->desired_matrix
);
2553 w
->current_matrix
= w
->desired_matrix
= NULL
;
2556 /* Next window on same level. */
2557 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2562 /* Check glyph memory leaks. This function is called from
2563 shut_down_emacs. Note that frames are not destroyed when Emacs
2564 exits. We therefore free all glyph memory for all active frames
2565 explicitly and check that nothing is left allocated. */
2568 check_glyph_memory ()
2570 Lisp_Object tail
, frame
;
2572 /* Free glyph memory for all frames. */
2573 FOR_EACH_FRAME (tail
, frame
)
2574 free_glyphs (XFRAME (frame
));
2576 /* Check that nothing is left allocated. */
2577 if (glyph_matrix_count
)
2579 if (glyph_pool_count
)
2585 /**********************************************************************
2586 Building a Frame Matrix
2587 **********************************************************************/
2589 /* Most of the redisplay code works on glyph matrices attached to
2590 windows. This is a good solution most of the time, but it is not
2591 suitable for terminal code. Terminal output functions cannot rely
2592 on being able to set an arbitrary terminal window. Instead they
2593 must be provided with a view of the whole frame, i.e. the whole
2594 screen. We build such a view by constructing a frame matrix from
2595 window matrices in this section.
2597 Windows that must be updated have their must_be_update_p flag set.
2598 For all such windows, their desired matrix is made part of the
2599 desired frame matrix. For other windows, their current matrix is
2600 made part of the desired frame matrix.
2602 +-----------------+----------------+
2603 | desired | desired |
2605 +-----------------+----------------+
2608 +----------------------------------+
2610 Desired window matrices can be made part of the frame matrix in a
2611 cheap way: We exploit the fact that the desired frame matrix and
2612 desired window matrices share their glyph memory. This is not
2613 possible for current window matrices. Their glyphs are copied to
2614 the desired frame matrix. The latter is equivalent to
2615 preserve_other_columns in the old redisplay.
2617 Used glyphs counters for frame matrix rows are the result of adding
2618 up glyph lengths of the window matrices. A line in the frame
2619 matrix is enabled, if a corresponding line in a window matrix is
2622 After building the desired frame matrix, it will be passed to
2623 terminal code, which will manipulate both the desired and current
2624 frame matrix. Changes applied to the frame's current matrix have
2625 to be visible in current window matrices afterwards, of course.
2627 This problem is solved like this:
2629 1. Window and frame matrices share glyphs. Window matrices are
2630 constructed in a way that their glyph contents ARE the glyph
2631 contents needed in a frame matrix. Thus, any modification of
2632 glyphs done in terminal code will be reflected in window matrices
2635 2. Exchanges of rows in a frame matrix done by terminal code are
2636 intercepted by hook functions so that corresponding row operations
2637 on window matrices can be performed. This is necessary because we
2638 use pointers to glyphs in glyph row structures. To satisfy the
2639 assumption of point 1 above that glyphs are updated implicitly in
2640 window matrices when they are manipulated via the frame matrix,
2641 window and frame matrix must of course agree where to find the
2642 glyphs for their rows. Possible manipulations that must be
2643 mirrored are assignments of rows of the desired frame matrix to the
2644 current frame matrix and scrolling the current frame matrix. */
2646 /* Build frame F's desired matrix from window matrices. Only windows
2647 which have the flag must_be_updated_p set have to be updated. Menu
2648 bar lines of a frame are not covered by window matrices, so make
2649 sure not to touch them in this function. */
2652 build_frame_matrix (f
)
2657 /* F must have a frame matrix when this function is called. */
2658 xassert (!FRAME_WINDOW_P (f
));
2660 /* Clear all rows in the frame matrix covered by window matrices.
2661 Menu bar lines are not covered by windows. */
2662 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2663 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2665 /* Build the matrix by walking the window tree. */
2666 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2667 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2671 /* Walk a window tree, building a frame matrix MATRIX from window
2672 matrices. W is the root of a window tree. */
2675 build_frame_matrix_from_window_tree (matrix
, w
)
2676 struct glyph_matrix
*matrix
;
2681 if (!NILP (w
->hchild
))
2682 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2683 else if (!NILP (w
->vchild
))
2684 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2686 build_frame_matrix_from_leaf_window (matrix
, w
);
2688 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2693 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2694 desired frame matrix built. W is a leaf window whose desired or
2695 current matrix is to be added to FRAME_MATRIX. W's flag
2696 must_be_updated_p determines which matrix it contributes to
2697 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2698 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2699 Adding a desired matrix means setting up used counters and such in
2700 frame rows, while adding a current window matrix to FRAME_MATRIX
2701 means copying glyphs. The latter case corresponds to
2702 preserve_other_columns in the old redisplay. */
2705 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2706 struct glyph_matrix
*frame_matrix
;
2709 struct glyph_matrix
*window_matrix
;
2710 int window_y
, frame_y
;
2711 /* If non-zero, a glyph to insert at the right border of W. */
2712 GLYPH right_border_glyph
= 0;
2714 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2715 if (w
->must_be_updated_p
)
2717 window_matrix
= w
->desired_matrix
;
2719 /* Decide whether we want to add a vertical border glyph. */
2720 if (!WINDOW_RIGHTMOST_P (w
))
2722 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2725 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2726 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2729 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2731 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2735 window_matrix
= w
->current_matrix
;
2737 /* For all rows in the window matrix and corresponding rows in the
2740 frame_y
= window_matrix
->matrix_y
;
2741 while (window_y
< window_matrix
->nrows
)
2743 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2744 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2745 int current_row_p
= window_matrix
== w
->current_matrix
;
2747 /* Fill up the frame row with spaces up to the left margin of the
2749 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2751 /* Fill up areas in the window matrix row with spaces. */
2752 fill_up_glyph_row_with_spaces (window_row
);
2754 /* If only part of W's desired matrix has been built, and
2755 window_row wasn't displayed, use the corresponding current
2757 if (window_matrix
== w
->desired_matrix
2758 && !window_row
->enabled_p
)
2760 window_row
= w
->current_matrix
->rows
+ window_y
;
2766 /* Copy window row to frame row. */
2767 bcopy (window_row
->glyphs
[0],
2768 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2769 window_matrix
->matrix_w
* sizeof (struct glyph
));
2773 xassert (window_row
->enabled_p
);
2775 /* Only when a desired row has been displayed, we want
2776 the corresponding frame row to be updated. */
2777 frame_row
->enabled_p
= 1;
2779 /* Maybe insert a vertical border between horizontally adjacent
2781 if (right_border_glyph
)
2783 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2784 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2788 /* Window row window_y must be a slice of frame row
2790 xassert (glyph_row_slice_p (window_row
, frame_row
));
2792 /* If rows are in sync, we don't have to copy glyphs because
2793 frame and window share glyphs. */
2795 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2796 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2800 /* Set number of used glyphs in the frame matrix. Since we fill
2801 up with spaces, and visit leaf windows from left to right it
2802 can be done simply. */
2803 frame_row
->used
[TEXT_AREA
]
2804 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2812 /* Given a user-specified glyph, possibly including a Lisp-level face
2813 ID, return a glyph that has a realized face ID.
2814 This is used for glyphs displayed specially and not part of the text;
2815 for instance, vertical separators, truncation markers, etc. */
2818 spec_glyph_lookup_face (w
, glyph
)
2822 int lface_id
= FAST_GLYPH_FACE (glyph
);
2823 /* Convert the glyph's specified face to a realized (cache) face. */
2826 int face_id
= merge_faces (XFRAME (w
->frame
),
2827 Qt
, lface_id
, DEFAULT_FACE_ID
);
2829 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2834 /* Add spaces to a glyph row ROW in a window matrix.
2836 Each row has the form:
2838 +---------+-----------------------------+------------+
2839 | left | text | right |
2840 +---------+-----------------------------+------------+
2842 Left and right marginal areas are optional. This function adds
2843 spaces to areas so that there are no empty holes between areas.
2844 In other words: If the right area is not empty, the text area
2845 is filled up with spaces up to the right area. If the text area
2846 is not empty, the left area is filled up.
2848 To be called for frame-based redisplay, only. */
2851 fill_up_glyph_row_with_spaces (row
)
2852 struct glyph_row
*row
;
2854 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2855 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2856 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2860 /* Fill area AREA of glyph row ROW with spaces. To be called for
2861 frame-based redisplay only. */
2864 fill_up_glyph_row_area_with_spaces (row
, area
)
2865 struct glyph_row
*row
;
2868 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2870 struct glyph
*end
= row
->glyphs
[area
+ 1];
2871 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2874 *text
++ = space_glyph
;
2875 row
->used
[area
] = text
- row
->glyphs
[area
];
2880 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2881 reached. In frame matrices only one area, TEXT_AREA, is used. */
2884 fill_up_frame_row_with_spaces (row
, upto
)
2885 struct glyph_row
*row
;
2888 int i
= row
->used
[TEXT_AREA
];
2889 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2892 glyph
[i
++] = space_glyph
;
2894 row
->used
[TEXT_AREA
] = i
;
2899 /**********************************************************************
2900 Mirroring operations on frame matrices in window matrices
2901 **********************************************************************/
2903 /* Set frame being updated via frame-based redisplay to F. This
2904 function must be called before updates to make explicit that we are
2905 working on frame matrices or not. */
2908 set_frame_matrix_frame (f
)
2911 frame_matrix_frame
= f
;
2915 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2916 DESIRED_MATRIX is the desired matrix corresponding to
2917 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2918 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2919 frame_matrix_frame is non-null, this indicates that the exchange is
2920 done in frame matrices, and that we have to perform analogous
2921 operations in window matrices of frame_matrix_frame. */
2924 make_current (desired_matrix
, current_matrix
, row
)
2925 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2928 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2929 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2930 int mouse_face_p
= current_row
->mouse_face_p
;
2932 /* Do current_row = desired_row. This exchanges glyph pointers
2933 between both rows, and does a structure assignment otherwise. */
2934 assign_row (current_row
, desired_row
);
2936 /* Enable current_row to mark it as valid. */
2937 current_row
->enabled_p
= 1;
2938 current_row
->mouse_face_p
= mouse_face_p
;
2940 /* If we are called on frame matrices, perform analogous operations
2941 for window matrices. */
2942 if (frame_matrix_frame
)
2943 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2947 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2948 W's frame which has been made current (by swapping pointers between
2949 current and desired matrix). Perform analogous operations in the
2950 matrices of leaf windows in the window tree rooted at W. */
2953 mirror_make_current (w
, frame_row
)
2959 if (!NILP (w
->hchild
))
2960 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2961 else if (!NILP (w
->vchild
))
2962 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2965 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2966 here because the checks performed in debug mode there
2967 will not allow the conversion. */
2968 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2970 /* If FRAME_ROW is within W, assign the desired row to the
2971 current row (exchanging glyph pointers). */
2972 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2974 struct glyph_row
*current_row
2975 = MATRIX_ROW (w
->current_matrix
, row
);
2976 struct glyph_row
*desired_row
2977 = MATRIX_ROW (w
->desired_matrix
, row
);
2979 if (desired_row
->enabled_p
)
2980 assign_row (current_row
, desired_row
);
2982 swap_glyph_pointers (desired_row
, current_row
);
2983 current_row
->enabled_p
= 1;
2987 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2992 /* Perform row dance after scrolling. We are working on the range of
2993 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2994 including) in MATRIX. COPY_FROM is a vector containing, for each
2995 row I in the range 0 <= I < NLINES, the index of the original line
2996 to move to I. This index is relative to the row range, i.e. 0 <=
2997 index < NLINES. RETAINED_P is a vector containing zero for each
2998 row 0 <= I < NLINES which is empty.
3000 This function is called from do_scrolling and do_direct_scrolling. */
3003 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3005 struct glyph_matrix
*matrix
;
3006 int unchanged_at_top
, nlines
;
3010 /* A copy of original rows. */
3011 struct glyph_row
*old_rows
;
3013 /* Rows to assign to. */
3014 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3018 /* Make a copy of the original rows. */
3019 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3020 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3022 /* Assign new rows, maybe clear lines. */
3023 for (i
= 0; i
< nlines
; ++i
)
3025 int enabled_before_p
= new_rows
[i
].enabled_p
;
3027 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3028 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3029 new_rows
[i
] = old_rows
[copy_from
[i
]];
3030 new_rows
[i
].enabled_p
= enabled_before_p
;
3032 /* RETAINED_P is zero for empty lines. */
3033 if (!retained_p
[copy_from
[i
]])
3034 new_rows
[i
].enabled_p
= 0;
3037 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3038 if (frame_matrix_frame
)
3039 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3040 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3044 /* Synchronize glyph pointers in the current matrix of window W with
3045 the current frame matrix. */
3048 sync_window_with_frame_matrix_rows (w
)
3051 struct frame
*f
= XFRAME (w
->frame
);
3052 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3053 int left
, right
, x
, width
;
3055 /* Preconditions: W must be a leaf window on a tty frame. */
3056 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3057 xassert (!FRAME_WINDOW_P (f
));
3059 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3060 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3061 x
= w
->current_matrix
->matrix_x
;
3062 width
= w
->current_matrix
->matrix_w
;
3064 window_row
= w
->current_matrix
->rows
;
3065 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3066 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3068 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3070 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3071 = frame_row
->glyphs
[0] + x
;
3072 window_row
->glyphs
[TEXT_AREA
]
3073 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3074 window_row
->glyphs
[LAST_AREA
]
3075 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3076 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3077 = window_row
->glyphs
[LAST_AREA
] - right
;
3082 /* Return the window in the window tree rooted in W containing frame
3083 row ROW. Value is null if none is found. */
3086 frame_row_to_window (w
, row
)
3090 struct window
*found
= NULL
;
3094 if (!NILP (w
->hchild
))
3095 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3096 else if (!NILP (w
->vchild
))
3097 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3098 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3099 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3102 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3109 /* Perform a line dance in the window tree rooted at W, after
3110 scrolling a frame matrix in mirrored_line_dance.
3112 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3113 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3114 COPY_FROM is a vector containing, for each row I in the range 0 <=
3115 I < NLINES, the index of the original line to move to I. This
3116 index is relative to the row range, i.e. 0 <= index < NLINES.
3117 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3121 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3123 int unchanged_at_top
, nlines
;
3129 if (!NILP (w
->hchild
))
3130 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3131 nlines
, copy_from
, retained_p
);
3132 else if (!NILP (w
->vchild
))
3133 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3134 nlines
, copy_from
, retained_p
);
3137 /* W is a leaf window, and we are working on its current
3139 struct glyph_matrix
*m
= w
->current_matrix
;
3141 struct glyph_row
*old_rows
;
3143 /* Make a copy of the original rows of matrix m. */
3144 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3145 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3147 for (i
= 0; i
< nlines
; ++i
)
3149 /* Frame relative line assigned to. */
3150 int frame_to
= i
+ unchanged_at_top
;
3152 /* Frame relative line assigned. */
3153 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3155 /* Window relative line assigned to. */
3156 int window_to
= frame_to
- m
->matrix_y
;
3158 /* Window relative line assigned. */
3159 int window_from
= frame_from
- m
->matrix_y
;
3161 /* Is assigned line inside window? */
3162 int from_inside_window_p
3163 = window_from
>= 0 && window_from
< m
->matrix_h
;
3165 /* Is assigned to line inside window? */
3166 int to_inside_window_p
3167 = window_to
>= 0 && window_to
< m
->matrix_h
;
3169 if (from_inside_window_p
&& to_inside_window_p
)
3171 /* Enabled setting before assignment. */
3172 int enabled_before_p
;
3174 /* Do the assignment. The enabled_p flag is saved
3175 over the assignment because the old redisplay did
3177 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3178 m
->rows
[window_to
] = old_rows
[window_from
];
3179 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3181 /* If frame line is empty, window line is empty, too. */
3182 if (!retained_p
[copy_from
[i
]])
3183 m
->rows
[window_to
].enabled_p
= 0;
3185 else if (to_inside_window_p
)
3187 /* A copy between windows. This is an infrequent
3188 case not worth optimizing. */
3189 struct frame
*f
= XFRAME (w
->frame
);
3190 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3192 struct glyph_matrix
*m2
;
3195 w2
= frame_row_to_window (root
, frame_from
);
3196 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3197 -nw', FROM_FRAME sometimes has no associated window.
3198 This check avoids a segfault if W2 is null. */
3201 m2
= w2
->current_matrix
;
3202 m2_from
= frame_from
- m2
->matrix_y
;
3203 copy_row_except_pointers (m
->rows
+ window_to
,
3204 m2
->rows
+ m2_from
);
3206 /* If frame line is empty, window line is empty, too. */
3207 if (!retained_p
[copy_from
[i
]])
3208 m
->rows
[window_to
].enabled_p
= 0;
3212 else if (from_inside_window_p
)
3216 /* If there was a copy between windows, make sure glyph
3217 pointers are in sync with the frame matrix. */
3219 sync_window_with_frame_matrix_rows (w
);
3221 /* Check that no pointers are lost. */
3225 /* Next window on same level. */
3226 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3233 /* Check that window and frame matrices agree about their
3234 understanding where glyphs of the rows are to find. For each
3235 window in the window tree rooted at W, check that rows in the
3236 matrices of leaf window agree with their frame matrices about
3240 check_window_matrix_pointers (w
)
3245 if (!NILP (w
->hchild
))
3246 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3247 else if (!NILP (w
->vchild
))
3248 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3251 struct frame
*f
= XFRAME (w
->frame
);
3252 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3253 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3256 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3261 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3262 a window and FRAME_MATRIX is the corresponding frame matrix. For
3263 each row in WINDOW_MATRIX check that it's a slice of the
3264 corresponding frame row. If it isn't, abort. */
3267 check_matrix_pointers (window_matrix
, frame_matrix
)
3268 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3270 /* Row number in WINDOW_MATRIX. */
3273 /* Row number corresponding to I in FRAME_MATRIX. */
3274 int j
= window_matrix
->matrix_y
;
3276 /* For all rows check that the row in the window matrix is a
3277 slice of the row in the frame matrix. If it isn't we didn't
3278 mirror an operation on the frame matrix correctly. */
3279 while (i
< window_matrix
->nrows
)
3281 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3282 frame_matrix
->rows
+ j
))
3288 #endif /* GLYPH_DEBUG != 0 */
3292 /**********************************************************************
3293 VPOS and HPOS translations
3294 **********************************************************************/
3298 /* Translate vertical position VPOS which is relative to window W to a
3299 vertical position relative to W's frame. */
3302 window_to_frame_vpos (w
, vpos
)
3306 struct frame
*f
= XFRAME (w
->frame
);
3308 xassert (!FRAME_WINDOW_P (f
));
3309 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3310 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3311 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3316 /* Translate horizontal position HPOS which is relative to window W to
3317 a horizontal position relative to W's frame. */
3320 window_to_frame_hpos (w
, hpos
)
3324 struct frame
*f
= XFRAME (w
->frame
);
3326 xassert (!FRAME_WINDOW_P (f
));
3327 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3331 #endif /* GLYPH_DEBUG */
3335 /**********************************************************************
3337 **********************************************************************/
3339 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3340 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3346 CHECK_LIVE_FRAME (frame
);
3349 /* Ignore redraw requests, if frame has no glyphs yet.
3350 (Implementation note: It still has to be checked why we are
3351 called so early here). */
3352 if (!glyphs_initialized_initially_p
)
3356 if (FRAME_MSDOS_P (f
))
3357 set_terminal_modes ();
3359 clear_current_matrices (f
);
3362 windows_or_buffers_changed
++;
3363 /* Mark all windows as inaccurate, so that every window will have
3364 its redisplay done. */
3365 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3366 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3372 /* Redraw frame F. This is nothing more than a call to the Lisp
3373 function redraw-frame. */
3380 XSETFRAME (frame
, f
);
3381 Fredraw_frame (frame
);
3385 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3386 doc
: /* Clear and redisplay all visible frames. */)
3389 Lisp_Object tail
, frame
;
3391 FOR_EACH_FRAME (tail
, frame
)
3392 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3393 Fredraw_frame (frame
);
3399 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3400 visible frames marked as garbaged. */
3403 redraw_garbaged_frames ()
3405 Lisp_Object tail
, frame
;
3407 FOR_EACH_FRAME (tail
, frame
)
3408 if (FRAME_VISIBLE_P (XFRAME (frame
))
3409 && FRAME_GARBAGED_P (XFRAME (frame
)))
3410 Fredraw_frame (frame
);
3415 /***********************************************************************
3417 ***********************************************************************/
3419 /* Try to update display and current glyph matrix directly.
3421 This function is called after a character G has been inserted into
3422 current_buffer. It tries to update the current glyph matrix and
3423 perform appropriate screen output to reflect the insertion. If it
3424 succeeds, the global flag redisplay_performed_directly_p will be
3425 set to 1, and thereby prevent the more costly general redisplay
3426 from running (see redisplay_internal).
3428 This function is not called for `hairy' character insertions.
3429 In particular, it is not called when after or before change
3430 functions exist, like they are used by font-lock. See keyboard.c
3431 for details where this function is called. */
3434 direct_output_for_insert (g
)
3437 register struct frame
*f
= SELECTED_FRAME ();
3438 struct window
*w
= XWINDOW (selected_window
);
3440 struct glyph_row
*glyph_row
;
3441 struct glyph
*glyphs
, *glyph
, *end
;
3443 /* Non-null means that redisplay of W is based on window matrices. */
3444 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3445 /* Non-null means we are in overwrite mode. */
3446 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3448 struct text_pos pos
;
3449 int delta
, delta_bytes
;
3451 /* Not done directly. */
3452 redisplay_performed_directly_p
= 0;
3454 /* Quickly give up for some common cases. */
3455 if (cursor_in_echo_area
3456 /* Give up if fonts have changed. */
3458 /* Give up if face attributes have been changed. */
3459 || face_change_count
3460 /* Give up if cursor position not really known. */
3461 || !display_completed
3462 /* Give up if buffer appears in two places. */
3463 || buffer_shared
> 1
3464 /* Give up if currently displaying a message instead of the
3465 minibuffer contents. */
3466 || (EQ (selected_window
, minibuf_window
)
3467 && EQ (minibuf_window
, echo_area_window
))
3468 /* Give up for hscrolled mini-buffer because display of the prompt
3469 is handled specially there (see display_line). */
3470 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3471 /* Give up if overwriting in the middle of a line. */
3474 && FETCH_BYTE (PT
) != '\n')
3475 /* Give up for tabs and line ends. */
3479 /* Give up if unable to display the cursor in the window. */
3480 || w
->cursor
.vpos
< 0
3481 /* Give up if we are showing a message or just cleared the message
3482 because we might need to resize the echo area window. */
3483 || !NILP (echo_area_buffer
[0])
3484 || !NILP (echo_area_buffer
[1])
3485 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3486 /* Can't do it in a continued line because continuation
3487 lines would change. */
3488 (glyph_row
->continued_p
3489 || glyph_row
->exact_window_width_line_p
3490 /* Can't use this method if the line overlaps others or is
3491 overlapped by others because these other lines would
3492 have to be redisplayed. */
3493 || glyph_row
->overlapping_p
3494 || glyph_row
->overlapped_p
))
3495 /* Can't do it for partial width windows on terminal frames
3496 because we can't clear to eol in such a window. */
3497 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3500 /* If we can't insert glyphs, we can use this method only
3501 at the end of a line. */
3502 if (!char_ins_del_ok
)
3503 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3506 /* Set up a display iterator structure for W. Glyphs will be
3507 produced in scratch_glyph_row. Current position is W's cursor
3509 clear_glyph_row (&scratch_glyph_row
);
3510 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3511 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3512 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3515 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3516 if (glyph_row
->mouse_face_p
)
3519 /* Give up if highlighting trailing whitespace and we have trailing
3520 whitespace in glyph_row. We would have to remove the trailing
3521 whitespace face in that case. */
3522 if (!NILP (Vshow_trailing_whitespace
)
3523 && glyph_row
->used
[TEXT_AREA
])
3527 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3528 if (last
->type
== STRETCH_GLYPH
3529 || (last
->type
== CHAR_GLYPH
3530 && last
->u
.ch
== ' '))
3534 /* Give up if there are overlay strings at pos. This would fail
3535 if the overlay string has newlines in it. */
3536 if (STRINGP (it
.string
))
3539 it
.hpos
= w
->cursor
.hpos
;
3540 it
.vpos
= w
->cursor
.vpos
;
3541 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3542 it
.current_y
= w
->cursor
.y
;
3543 it
.end_charpos
= PT
;
3544 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3545 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3547 /* More than one display element may be returned for PT - 1 if
3548 (i) it's a control character which is translated into `\003' or
3549 `^C', or (ii) it has a display table entry, or (iii) it's a
3550 combination of both. */
3551 delta
= delta_bytes
= 0;
3552 while (get_next_display_element (&it
))
3554 PRODUCE_GLYPHS (&it
);
3556 /* Give up if glyph doesn't fit completely on the line. */
3557 if (it
.current_x
>= it
.last_visible_x
)
3560 /* Give up if new glyph has different ascent or descent than
3561 the original row, or if it is not a character glyph. */
3562 if (glyph_row
->ascent
!= it
.ascent
3563 || glyph_row
->height
!= it
.ascent
+ it
.descent
3564 || glyph_row
->phys_ascent
!= it
.phys_ascent
3565 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3566 || it
.what
!= IT_CHARACTER
)
3570 delta_bytes
+= it
.len
;
3571 set_iterator_to_next (&it
, 1);
3574 /* Give up if we hit the right edge of the window. We would have
3575 to insert truncation or continuation glyphs. */
3576 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3577 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3580 /* Give up if there is a \t following in the line. */
3582 it2
.end_charpos
= ZV
;
3583 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3584 while (get_next_display_element (&it2
)
3585 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3589 set_iterator_to_next (&it2
, 1);
3592 /* Number of new glyphs produced. */
3593 n
= it
.glyph_row
->used
[TEXT_AREA
];
3595 /* Start and end of glyphs in original row. */
3596 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3597 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3599 /* Make room for new glyphs, then insert them. */
3600 xassert (end
- glyphs
- n
>= 0);
3601 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3602 (end
- glyphs
- n
) * sizeof (*end
));
3603 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3604 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3605 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3607 /* Compute new line width. */
3608 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3609 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3610 glyph_row
->pixel_width
= glyph_row
->x
;
3613 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3617 /* Increment buffer positions for glyphs following the newly
3619 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3620 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3621 glyph
->charpos
+= delta
;
3623 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3625 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3626 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3629 /* Adjust positions in lines following the one we are in. */
3630 increment_matrix_positions (w
->current_matrix
,
3632 w
->current_matrix
->nrows
,
3633 delta
, delta_bytes
);
3635 glyph_row
->contains_overlapping_glyphs_p
3636 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3638 glyph_row
->displays_text_p
= 1;
3639 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3640 XFASTINT (w
->window_end_vpos
)));
3642 if (!NILP (Vshow_trailing_whitespace
))
3643 highlight_trailing_whitespace (it
.f
, glyph_row
);
3645 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3646 In the middle, we have to insert glyphs. Note that this is now
3647 implemented for X frames. The implementation uses updated_window
3649 updated_row
= glyph_row
;
3650 updated_area
= TEXT_AREA
;
3654 rif
->update_window_begin_hook (w
);
3656 if (glyphs
== end
- n
3657 /* In front of a space added by append_space. */
3658 || (glyphs
== end
- n
- 1
3659 && (end
- n
)->charpos
<= 0))
3660 rif
->write_glyphs (glyphs
, n
);
3662 rif
->insert_glyphs (glyphs
, n
);
3666 if (glyphs
== end
- n
)
3667 write_glyphs (glyphs
, n
);
3669 insert_glyphs (glyphs
, n
);
3672 w
->cursor
.hpos
+= n
;
3673 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3674 xassert (w
->cursor
.hpos
>= 0
3675 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3677 /* How to set the cursor differs depending on whether we are
3678 using a frame matrix or a window matrix. Note that when
3679 a frame matrix is used, cursor_to expects frame coordinates,
3680 and the X and Y parameters are not used. */
3681 if (window_redisplay_p
)
3682 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3683 w
->cursor
.y
, w
->cursor
.x
);
3687 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3688 + (INTEGERP (w
->left_margin_cols
)
3689 ? XFASTINT (w
->left_margin_cols
)
3691 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3695 #ifdef HAVE_WINDOW_SYSTEM
3696 update_window_fringes (w
, 0);
3700 rif
->update_window_end_hook (w
, 1, 0);
3705 TRACE ((stderr
, "direct output for insert\n"));
3706 mark_window_display_accurate (it
.window
, 1);
3707 redisplay_performed_directly_p
= 1;
3712 /* Perform a direct display update for moving PT by N positions
3713 left or right. N < 0 means a movement backwards. This function
3714 is currently only called for N == 1 or N == -1. */
3717 direct_output_forward_char (n
)
3720 struct frame
*f
= SELECTED_FRAME ();
3721 struct window
*w
= XWINDOW (selected_window
);
3722 struct glyph_row
*row
;
3724 /* Give up if point moved out of or into a composition. */
3725 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3726 current_buffer
, PT
))
3729 /* Give up if face attributes have been changed. */
3730 if (face_change_count
)
3733 /* Give up if current matrix is not up to date or we are
3734 displaying a message. */
3735 if (!display_completed
|| cursor_in_echo_area
)
3738 /* Give up if the buffer's direction is reversed. */
3739 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3742 /* Can't use direct output if highlighting a region. */
3743 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3746 /* Can't use direct output if highlighting trailing whitespace. */
3747 if (!NILP (Vshow_trailing_whitespace
))
3750 /* Give up if we are showing a message or just cleared the message
3751 because we might need to resize the echo area window. */
3752 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3755 /* Give up if currently displaying a message instead of the
3756 minibuffer contents. */
3757 if (XWINDOW (minibuf_window
) == w
3758 && EQ (minibuf_window
, echo_area_window
))
3761 /* Give up if we don't know where the cursor is. */
3762 if (w
->cursor
.vpos
< 0)
3765 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3767 /* Give up if PT is outside of the last known cursor row. */
3768 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3769 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3772 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3774 w
->last_cursor
= w
->cursor
;
3775 XSETFASTINT (w
->last_point
, PT
);
3777 xassert (w
->cursor
.hpos
>= 0
3778 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3780 if (FRAME_WINDOW_P (f
))
3781 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3782 w
->cursor
.y
, w
->cursor
.x
);
3786 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3787 + (INTEGERP (w
->left_margin_cols
)
3788 ? XFASTINT (w
->left_margin_cols
)
3790 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3795 redisplay_performed_directly_p
= 1;
3801 /***********************************************************************
3803 ***********************************************************************/
3805 /* Update frame F based on the data in desired matrices.
3807 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3808 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3811 Value is non-zero if redisplay was stopped due to pending input. */
3814 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3817 int inhibit_hairy_id_p
;
3819 /* 1 means display has been paused because of pending input. */
3821 struct window
*root_window
= XWINDOW (f
->root_window
);
3823 if (FRAME_WINDOW_P (f
))
3825 /* We are working on window matrix basis. All windows whose
3826 flag must_be_updated_p is set have to be updated. */
3828 /* Record that we are not working on frame matrices. */
3829 set_frame_matrix_frame (NULL
);
3831 /* Update all windows in the window tree of F, maybe stopping
3832 when pending input is detected. */
3835 /* Update the menu bar on X frames that don't have toolkit
3837 if (WINDOWP (f
->menu_bar_window
))
3838 update_window (XWINDOW (f
->menu_bar_window
), 1);
3840 /* Update the tool-bar window, if present. */
3841 if (WINDOWP (f
->tool_bar_window
))
3843 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3845 /* Update tool-bar window. */
3846 if (w
->must_be_updated_p
)
3850 update_window (w
, 1);
3851 w
->must_be_updated_p
= 0;
3853 /* Swap tool-bar strings. We swap because we want to
3855 tem
= f
->current_tool_bar_string
;
3856 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3857 f
->desired_tool_bar_string
= tem
;
3862 /* Update windows. */
3863 paused_p
= update_window_tree (root_window
, force_p
);
3866 /* This flush is a performance bottleneck under X,
3867 and it doesn't seem to be necessary anyway (in general).
3868 It is necessary when resizing the window with the mouse, or
3869 at least the fringes are not redrawn in a timely manner. ++kfs */
3870 if (f
->force_flush_display_p
)
3872 rif
->flush_display (f
);
3873 f
->force_flush_display_p
= 0;
3878 /* We are working on frame matrix basis. Set the frame on whose
3879 frame matrix we operate. */
3880 set_frame_matrix_frame (f
);
3882 /* Build F's desired matrix from window matrices. */
3883 build_frame_matrix (f
);
3885 /* Update the display */
3887 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3891 fflush (termscript
);
3894 /* Check window matrices for lost pointers. */
3896 check_window_matrix_pointers (root_window
);
3897 add_frame_display_history (f
, paused_p
);
3901 /* Reset flags indicating that a window should be updated. */
3902 set_window_update_flags (root_window
, 0);
3904 display_completed
= !paused_p
;
3910 /************************************************************************
3911 Window-based updates
3912 ************************************************************************/
3914 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3915 don't stop updating when input is pending. */
3918 update_window_tree (w
, force_p
)
3924 while (w
&& !paused_p
)
3926 if (!NILP (w
->hchild
))
3927 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3928 else if (!NILP (w
->vchild
))
3929 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3930 else if (w
->must_be_updated_p
)
3931 paused_p
|= update_window (w
, force_p
);
3933 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3940 /* Update window W if its flag must_be_updated_p is non-zero. If
3941 FORCE_P is non-zero, don't stop updating if input is pending. */
3944 update_single_window (w
, force_p
)
3948 if (w
->must_be_updated_p
)
3950 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3952 /* Record that this is not a frame-based redisplay. */
3953 set_frame_matrix_frame (NULL
);
3957 update_window (w
, force_p
);
3960 /* Reset flag in W. */
3961 w
->must_be_updated_p
= 0;
3966 /* Redraw lines from the current matrix of window W that are
3967 overlapped by other rows. YB is bottom-most y-position in W. */
3970 redraw_overlapped_rows (w
, yb
)
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 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3999 if (row
->used
[area
])
4000 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
4001 rif
->clear_end_of_line (-1);
4004 row
->overlapped_p
= 0;
4007 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4013 /* Redraw lines from the current matrix of window W that overlap
4014 others. YB is bottom-most y-position in W. */
4017 redraw_overlapping_rows (w
, yb
)
4022 struct glyph_row
*row
;
4024 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4026 row
= w
->current_matrix
->rows
+ i
;
4028 if (!row
->enabled_p
)
4030 else if (row
->mode_line_p
)
4033 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4035 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4037 if (row
->used
[LEFT_MARGIN_AREA
])
4038 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
4040 if (row
->used
[TEXT_AREA
])
4041 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
4043 if (row
->used
[RIGHT_MARGIN_AREA
])
4044 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4046 /* Record in neighbour rows that ROW overwrites part of their
4048 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4049 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4050 if ((row
->phys_height
- row
->phys_ascent
4051 > row
->height
- row
->ascent
)
4053 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4064 /* Check that no row in the current matrix of window W is enabled
4065 which is below what's displayed in the window. */
4068 check_current_matrix_flags (w
)
4071 int last_seen_p
= 0;
4072 int i
, yb
= window_text_bottom_y (w
);
4074 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4076 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4077 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4079 else if (last_seen_p
&& row
->enabled_p
)
4084 #endif /* GLYPH_DEBUG */
4087 /* Update display of window W. FORCE_P non-zero means that we should
4088 not stop when detecting pending input. */
4091 update_window (w
, force_p
)
4095 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4097 int preempt_count
= baud_rate
/ 2400 + 1;
4098 extern int input_pending
;
4099 extern Lisp_Object do_mouse_tracking
;
4101 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4103 /* Check that W's frame doesn't have glyph matrices. */
4104 xassert (FRAME_WINDOW_P (f
));
4105 xassert (updating_frame
!= NULL
);
4108 /* Check pending input the first time so that we can quickly return. */
4109 if (redisplay_dont_pause
)
4112 detect_input_pending_ignore_squeezables ();
4114 /* If forced to complete the update, or if no input is pending, do
4116 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4118 struct glyph_row
*row
, *end
;
4119 struct glyph_row
*mode_line_row
;
4120 struct glyph_row
*header_line_row
;
4121 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4123 rif
->update_window_begin_hook (w
);
4124 yb
= window_text_bottom_y (w
);
4126 /* If window has a header line, update it before everything else.
4127 Adjust y-positions of other rows by the header line height. */
4128 row
= desired_matrix
->rows
;
4129 end
= row
+ desired_matrix
->nrows
- 1;
4131 if (row
->mode_line_p
)
4133 header_line_row
= row
;
4137 header_line_row
= NULL
;
4139 /* Update the mode line, if necessary. */
4140 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4141 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4143 mode_line_row
->y
= yb
;
4144 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4146 &mouse_face_overwritten_p
);
4150 /* Find first enabled row. Optimizations in redisplay_internal
4151 may lead to an update with only one row enabled. There may
4152 be also completely empty matrices. */
4153 while (row
< end
&& !row
->enabled_p
)
4156 /* Try reusing part of the display by copying. */
4157 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4159 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4162 /* All rows were found to be equal. */
4168 /* We've scrolled the display. */
4174 /* Update the rest of the lines. */
4175 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4178 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4181 /* We'll have to play a little bit with when to
4182 detect_input_pending. If it's done too often,
4183 scrolling large windows with repeated scroll-up
4184 commands will too quickly pause redisplay. */
4185 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4186 detect_input_pending_ignore_squeezables ();
4188 changed_p
|= update_window_line (w
, vpos
,
4189 &mouse_face_overwritten_p
);
4191 /* Mark all rows below the last visible one in the current
4192 matrix as invalid. This is necessary because of
4193 variable line heights. Consider the case of three
4194 successive redisplays, where the first displays 5
4195 lines, the second 3 lines, and the third 5 lines again.
4196 If the second redisplay wouldn't mark rows in the
4197 current matrix invalid, the third redisplay might be
4198 tempted to optimize redisplay based on lines displayed
4199 in the first redisplay. */
4200 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4201 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4202 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4205 /* Was display preempted? */
4206 paused_p
= row
< end
;
4210 /* Update the header line after scrolling because a new header
4211 line would otherwise overwrite lines at the top of the window
4212 that can be scrolled. */
4213 if (header_line_row
&& header_line_row
->enabled_p
)
4215 header_line_row
->y
= 0;
4216 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4220 /* Fix the appearance of overlapping/overlapped rows. */
4221 if (!paused_p
&& !w
->pseudo_window_p
)
4223 if (changed_p
&& rif
->fix_overlapping_area
)
4225 redraw_overlapped_rows (w
, yb
);
4226 redraw_overlapping_rows (w
, yb
);
4229 /* Make cursor visible at cursor position of W. */
4230 set_window_cursor_after_update (w
);
4232 #if 0 /* Check that current matrix invariants are satisfied. This is
4233 for debugging only. See the comment of check_matrix_invariants. */
4234 IF_DEBUG (check_matrix_invariants (w
));
4239 /* Remember the redisplay method used to display the matrix. */
4240 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4243 #ifdef HAVE_WINDOW_SYSTEM
4244 update_window_fringes (w
, 0);
4247 /* End the update of window W. Don't set the cursor if we
4248 paused updating the display because in this case,
4249 set_window_cursor_after_update hasn't been called, and
4250 output_cursor doesn't contain the cursor location. */
4251 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4257 /* check_current_matrix_flags (w); */
4258 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4261 clear_glyph_matrix (desired_matrix
);
4267 /* Update the display of area AREA in window W, row number VPOS.
4268 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4271 update_marginal_area (w
, area
, vpos
)
4275 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4277 /* Let functions in xterm.c know what area subsequent X positions
4278 will be relative to. */
4279 updated_area
= area
;
4281 /* Set cursor to start of glyphs, write them, and clear to the end
4282 of the area. I don't think that something more sophisticated is
4283 necessary here, since marginal areas will not be the default. */
4284 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4285 if (desired_row
->used
[area
])
4286 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4287 rif
->clear_end_of_line (-1);
4291 /* Update the display of the text area of row VPOS in window W.
4292 Value is non-zero if display has changed. */
4295 update_text_area (w
, vpos
)
4299 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4300 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4303 /* Let functions in xterm.c know what area subsequent X positions
4304 will be relative to. */
4305 updated_area
= TEXT_AREA
;
4307 /* If rows are at different X or Y, or rows have different height,
4308 or the current row is marked invalid, write the entire line. */
4309 if (!current_row
->enabled_p
4310 || desired_row
->y
!= current_row
->y
4311 || desired_row
->ascent
!= current_row
->ascent
4312 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4313 || desired_row
->phys_height
!= current_row
->phys_height
4314 || desired_row
->visible_height
!= current_row
->visible_height
4315 || current_row
->overlapped_p
4316 || current_row
->mouse_face_p
4317 || current_row
->x
!= desired_row
->x
)
4319 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4321 if (desired_row
->used
[TEXT_AREA
])
4322 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4323 desired_row
->used
[TEXT_AREA
]);
4325 /* Clear to end of window. */
4326 rif
->clear_end_of_line (-1);
4329 /* This erases the cursor. We do this here because
4330 notice_overwritten_cursor cannot easily check this, which
4331 might indicate that the whole functionality of
4332 notice_overwritten_cursor would better be implemented here.
4333 On the other hand, we need notice_overwritten_cursor as long
4334 as mouse highlighting is done asynchronously outside of
4336 if (vpos
== w
->phys_cursor
.vpos
)
4337 w
->phys_cursor_on_p
= 0;
4342 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4343 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4344 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4345 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4347 /* If the desired row extends its face to the text area end,
4348 make sure we write at least one glyph, so that the face
4349 extension actually takes place. */
4350 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4353 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4357 /* Loop over glyphs that current and desired row may have
4363 /* Skip over glyphs that both rows have in common. These
4364 don't have to be written. We can't skip if the last
4365 current glyph overlaps the glyph to its right. For
4366 example, consider a current row of `if ' with the `f' in
4367 Courier bold so that it overlaps the ` ' to its right.
4368 If the desired row is ` ', we would skip over the space
4369 after the `if' and there would remain a pixel from the
4370 `f' on the screen. */
4371 if (overlapping_glyphs_p
&& i
> 0)
4373 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4376 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4378 can_skip_p
= right
== 0;
4384 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4386 x
+= desired_glyph
->pixel_width
;
4387 ++desired_glyph
, ++current_glyph
, ++i
;
4390 /* Consider the case that the current row contains "xxx
4391 ppp ggg" in italic Courier font, and the desired row
4392 is "xxx ggg". The character `p' has lbearing, `g'
4393 has not. The loop above will stop in front of the
4394 first `p' in the current row. If we would start
4395 writing glyphs there, we wouldn't erase the lbearing
4396 of the `p'. The rest of the lbearing problem is then
4397 taken care of by draw_glyphs. */
4398 if (overlapping_glyphs_p
4400 && i
< current_row
->used
[TEXT_AREA
]
4401 && (current_row
->used
[TEXT_AREA
]
4402 != desired_row
->used
[TEXT_AREA
]))
4406 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4408 while (left
> 0 && i
> 0)
4410 --i
, --desired_glyph
, --current_glyph
;
4411 x
-= desired_glyph
->pixel_width
;
4412 left
-= desired_glyph
->pixel_width
;
4417 /* Try to avoid writing the entire rest of the desired row
4418 by looking for a resync point. This mainly prevents
4419 mode line flickering in the case the mode line is in
4420 fixed-pitch font, which it usually will be. */
4421 if (i
< desired_row
->used
[TEXT_AREA
])
4423 int start_x
= x
, start_hpos
= i
;
4424 struct glyph
*start
= desired_glyph
;
4426 int skip_first_p
= !can_skip_p
;
4428 /* Find the next glyph that's equal again. */
4431 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4434 x
+= desired_glyph
->pixel_width
;
4435 current_x
+= current_glyph
->pixel_width
;
4436 ++desired_glyph
, ++current_glyph
, ++i
;
4440 if (i
== start_hpos
|| x
!= current_x
)
4444 desired_glyph
= start
;
4448 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4449 rif
->write_glyphs (start
, i
- start_hpos
);
4454 /* Write the rest. */
4455 if (i
< desired_row
->used
[TEXT_AREA
])
4457 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4458 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4462 /* Maybe clear to end of line. */
4463 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4465 /* If new row extends to the end of the text area, nothing
4466 has to be cleared, if and only if we did a write_glyphs
4467 above. This is made sure by setting desired_stop_pos
4468 appropriately above. */
4469 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4471 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4473 /* If old row extends to the end of the text area, clear. */
4474 if (i
>= desired_row
->used
[TEXT_AREA
])
4475 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4476 desired_row
->pixel_width
);
4477 rif
->clear_end_of_line (-1);
4480 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4482 /* Otherwise clear to the end of the old row. Everything
4483 after that position should be clear already. */
4486 if (i
>= desired_row
->used
[TEXT_AREA
])
4487 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4488 desired_row
->pixel_width
);
4490 /* If cursor is displayed at the end of the line, make sure
4491 it's cleared. Nowadays we don't have a phys_cursor_glyph
4492 with which to erase the cursor (because this method
4493 doesn't work with lbearing/rbearing), so we must do it
4495 if (vpos
== w
->phys_cursor
.vpos
4496 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4498 w
->phys_cursor_on_p
= 0;
4502 x
= current_row
->pixel_width
;
4503 rif
->clear_end_of_line (x
);
4512 /* Update row VPOS in window W. Value is non-zero if display has been
4516 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4518 int vpos
, *mouse_face_overwritten_p
;
4520 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4521 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4524 /* Set the row being updated. This is important to let xterm.c
4525 know what line height values are in effect. */
4526 updated_row
= desired_row
;
4528 /* A row can be completely invisible in case a desired matrix was
4529 built with a vscroll and then make_cursor_line_fully_visible shifts
4530 the matrix. Make sure to make such rows current anyway, since
4531 we need the correct y-position, for example, in the current matrix. */
4532 if (desired_row
->mode_line_p
4533 || desired_row
->visible_height
> 0)
4535 xassert (desired_row
->enabled_p
);
4537 /* Update display of the left margin area, if there is one. */
4538 if (!desired_row
->full_width_p
4539 && !NILP (w
->left_margin_cols
))
4542 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4545 /* Update the display of the text area. */
4546 if (update_text_area (w
, vpos
))
4549 if (current_row
->mouse_face_p
)
4550 *mouse_face_overwritten_p
= 1;
4553 /* Update display of the right margin area, if there is one. */
4554 if (!desired_row
->full_width_p
4555 && !NILP (w
->right_margin_cols
))
4558 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4561 /* Draw truncation marks etc. */
4562 if (!current_row
->enabled_p
4563 || desired_row
->y
!= current_row
->y
4564 || desired_row
->visible_height
!= current_row
->visible_height
4565 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4566 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4567 || current_row
->redraw_fringe_bitmaps_p
4568 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4569 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4570 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4571 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4572 rif
->after_update_window_line_hook (desired_row
);
4575 /* Update current_row from desired_row. */
4576 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4582 /* Set the cursor after an update of window W. This function may only
4583 be called from update_window. */
4586 set_window_cursor_after_update (w
)
4589 struct frame
*f
= XFRAME (w
->frame
);
4590 int cx
, cy
, vpos
, hpos
;
4592 /* Not intended for frame matrix updates. */
4593 xassert (FRAME_WINDOW_P (f
));
4595 if (cursor_in_echo_area
4596 && !NILP (echo_area_buffer
[0])
4597 /* If we are showing a message instead of the mini-buffer,
4598 show the cursor for the message instead. */
4599 && XWINDOW (minibuf_window
) == w
4600 && EQ (minibuf_window
, echo_area_window
)
4601 /* These cases apply only to the frame that contains
4602 the active mini-buffer window. */
4603 && FRAME_HAS_MINIBUF_P (f
)
4604 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4606 cx
= cy
= vpos
= hpos
= 0;
4608 if (cursor_in_echo_area
>= 0)
4610 /* If the mini-buffer is several lines high, find the last
4611 line that has any text on it. Note: either all lines
4612 are enabled or none. Otherwise we wouldn't be able to
4614 struct glyph_row
*row
, *last_row
;
4615 struct glyph
*glyph
;
4616 int yb
= window_text_bottom_y (w
);
4619 row
= w
->current_matrix
->rows
;
4620 while (row
->enabled_p
4621 && (last_row
== NULL
4622 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4624 if (row
->used
[TEXT_AREA
]
4625 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4632 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4633 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4635 while (last
> start
&& last
->charpos
< 0)
4638 for (glyph
= start
; glyph
< last
; ++glyph
)
4640 cx
+= glyph
->pixel_width
;
4645 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4653 hpos
= w
->cursor
.hpos
;
4654 vpos
= w
->cursor
.vpos
;
4657 /* Window cursor can be out of sync for horizontally split windows. */
4658 hpos
= max (0, hpos
);
4659 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4660 vpos
= max (0, vpos
);
4661 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4662 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4666 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4667 tree rooted at W. */
4670 set_window_update_flags (w
, on_p
)
4676 if (!NILP (w
->hchild
))
4677 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4678 else if (!NILP (w
->vchild
))
4679 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4681 w
->must_be_updated_p
= on_p
;
4683 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4689 /***********************************************************************
4690 Window-Based Scrolling
4691 ***********************************************************************/
4693 /* Structure describing rows in scrolling_window. */
4697 /* Number of occurrences of this row in desired and current matrix. */
4698 int old_uses
, new_uses
;
4700 /* Vpos of row in new matrix. */
4701 int new_line_number
;
4703 /* Bucket index of this row_entry in the hash table row_table. */
4706 /* The row described by this entry. */
4707 struct glyph_row
*row
;
4709 /* Hash collision chain. */
4710 struct row_entry
*next
;
4713 /* A pool to allocate row_entry structures from, and the size of the
4714 pool. The pool is reallocated in scrolling_window when we find
4715 that we need a larger one. */
4717 static struct row_entry
*row_entry_pool
;
4718 static int row_entry_pool_size
;
4720 /* Index of next free entry in row_entry_pool. */
4722 static int row_entry_idx
;
4724 /* The hash table used during scrolling, and the table's size. This
4725 table is used to quickly identify equal rows in the desired and
4728 static struct row_entry
**row_table
;
4729 static int row_table_size
;
4731 /* Vectors of pointers to row_entry structures belonging to the
4732 current and desired matrix, and the size of the vectors. */
4734 static struct row_entry
**old_lines
, **new_lines
;
4735 static int old_lines_size
, new_lines_size
;
4737 /* A pool to allocate run structures from, and its size. */
4739 static struct run
*run_pool
;
4740 static int runs_size
;
4742 /* A vector of runs of lines found during scrolling. */
4744 static struct run
**runs
;
4746 /* Add glyph row ROW to the scrolling hash table during the scrolling
4749 static INLINE
struct row_entry
*
4750 add_row_entry (w
, row
)
4752 struct glyph_row
*row
;
4754 struct row_entry
*entry
;
4755 int i
= row
->hash
% row_table_size
;
4757 entry
= row_table
[i
];
4758 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4759 entry
= entry
->next
;
4763 entry
= row_entry_pool
+ row_entry_idx
++;
4765 entry
->old_uses
= entry
->new_uses
= 0;
4766 entry
->new_line_number
= 0;
4768 entry
->next
= row_table
[i
];
4769 row_table
[i
] = entry
;
4776 /* Try to reuse part of the current display of W by scrolling lines.
4777 HEADER_LINE_P non-zero means W has a header line.
4779 The algorithm is taken from Communications of the ACM, Apr78 "A
4780 Technique for Isolating Differences Between Files." It should take
4783 A short outline of the steps of the algorithm
4785 1. Skip lines equal at the start and end of both matrices.
4787 2. Enter rows in the current and desired matrix into a symbol
4788 table, counting how often they appear in both matrices.
4790 3. Rows that appear exactly once in both matrices serve as anchors,
4791 i.e. we assume that such lines are likely to have been moved.
4793 4. Starting from anchor lines, extend regions to be scrolled both
4794 forward and backward.
4798 -1 if all rows were found to be equal.
4799 0 to indicate that we did not scroll the display, or
4800 1 if we did scroll. */
4803 scrolling_window (w
, header_line_p
)
4807 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4808 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4809 int yb
= window_text_bottom_y (w
);
4810 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4811 int nruns
, nbytes
, n
, run_idx
;
4812 struct row_entry
*entry
;
4814 /* Skip over rows equal at the start. */
4815 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4817 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4818 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4822 && !d
->redraw_fringe_bitmaps_p
4824 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4825 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4826 && row_equal_p (w
, c
, d
, 1))
4835 /* Give up if some rows in the desired matrix are not enabled. */
4836 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4839 first_old
= first_new
= i
;
4841 /* Set last_new to the index + 1 of the last enabled row in the
4844 while (i
< desired_matrix
->nrows
- 1
4845 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4846 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4849 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4854 /* Set last_old to the index + 1 of the last enabled row in the
4855 current matrix. We don't look at the enabled flag here because
4856 we plan to reuse part of the display even if other parts are
4859 while (i
< current_matrix
->nrows
- 1)
4861 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4870 /* Skip over rows equal at the bottom. */
4873 while (i
- 1 > first_new
4874 && j
- 1 > first_old
4875 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4876 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4877 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4878 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4880 MATRIX_ROW (desired_matrix
, i
- 1),
4881 MATRIX_ROW (current_matrix
, j
- 1), 1))
4886 /* Nothing to do if all rows are equal. */
4887 if (last_new
== first_new
)
4890 /* Reallocate vectors, tables etc. if necessary. */
4892 if (current_matrix
->nrows
> old_lines_size
)
4894 old_lines_size
= current_matrix
->nrows
;
4895 nbytes
= old_lines_size
* sizeof *old_lines
;
4896 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4899 if (desired_matrix
->nrows
> new_lines_size
)
4901 new_lines_size
= desired_matrix
->nrows
;
4902 nbytes
= new_lines_size
* sizeof *new_lines
;
4903 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4906 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4907 if (3 * n
> row_table_size
)
4909 row_table_size
= next_almost_prime (3 * n
);
4910 nbytes
= row_table_size
* sizeof *row_table
;
4911 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4912 bzero (row_table
, nbytes
);
4915 if (n
> row_entry_pool_size
)
4917 row_entry_pool_size
= n
;
4918 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4919 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4922 if (desired_matrix
->nrows
> runs_size
)
4924 runs_size
= desired_matrix
->nrows
;
4925 nbytes
= runs_size
* sizeof *runs
;
4926 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4927 nbytes
= runs_size
* sizeof *run_pool
;
4928 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4931 nruns
= run_idx
= 0;
4934 /* Add rows from the current and desired matrix to the hash table
4935 row_hash_table to be able to find equal ones quickly. */
4937 for (i
= first_old
; i
< last_old
; ++i
)
4939 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4941 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4942 old_lines
[i
] = entry
;
4946 old_lines
[i
] = NULL
;
4949 for (i
= first_new
; i
< last_new
; ++i
)
4951 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4952 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4954 entry
->new_line_number
= i
;
4955 new_lines
[i
] = entry
;
4958 /* Identify moves based on lines that are unique and equal
4959 in both matrices. */
4960 for (i
= first_old
; i
< last_old
;)
4962 && old_lines
[i
]->old_uses
== 1
4963 && old_lines
[i
]->new_uses
== 1)
4966 int new_line
= old_lines
[i
]->new_line_number
;
4967 struct run
*run
= run_pool
+ run_idx
++;
4970 run
->current_vpos
= i
;
4971 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4972 run
->desired_vpos
= new_line
;
4973 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4975 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4977 /* Extend backward. */
4980 while (j
> first_old
4982 && old_lines
[j
] == new_lines
[k
])
4984 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4985 --run
->current_vpos
;
4986 --run
->desired_vpos
;
4989 run
->desired_y
-= h
;
4990 run
->current_y
-= h
;
4994 /* Extend forward. */
4999 && old_lines
[j
] == new_lines
[k
])
5001 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5007 /* Insert run into list of all runs. Order runs by copied
5008 pixel lines. Note that we record runs that don't have to
5009 be copied because they are already in place. This is done
5010 because we can avoid calling update_window_line in this
5012 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5014 for (k
= nruns
; k
> j
; --k
)
5015 runs
[k
] = runs
[k
- 1];
5024 /* Do the moves. Do it in a way that we don't overwrite something
5025 we want to copy later on. This is not solvable in general
5026 because there is only one display and we don't have a way to
5027 exchange areas on this display. Example:
5029 +-----------+ +-----------+
5031 +-----------+ --> +-----------+
5033 +-----------+ +-----------+
5035 Instead, prefer bigger moves, and invalidate moves that would
5036 copy from where we copied to. */
5038 for (i
= 0; i
< nruns
; ++i
)
5039 if (runs
[i
]->nrows
> 0)
5041 struct run
*r
= runs
[i
];
5043 /* Copy on the display. */
5044 if (r
->current_y
!= r
->desired_y
)
5046 rif
->scroll_run_hook (w
, r
);
5048 /* Invalidate runs that copy from where we copied to. */
5049 for (j
= i
+ 1; j
< nruns
; ++j
)
5051 struct run
*p
= runs
[j
];
5053 if ((p
->current_y
>= r
->desired_y
5054 && p
->current_y
< r
->desired_y
+ r
->height
)
5055 || (p
->current_y
+ p
->height
>= r
->desired_y
5056 && (p
->current_y
+ p
->height
5057 < r
->desired_y
+ r
->height
)))
5062 /* Assign matrix rows. */
5063 for (j
= 0; j
< r
->nrows
; ++j
)
5065 struct glyph_row
*from
, *to
;
5066 int to_overlapped_p
;
5068 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5069 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5070 to_overlapped_p
= to
->overlapped_p
;
5071 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5072 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5073 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5074 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5075 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5076 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5077 from
->redraw_fringe_bitmaps_p
= 1;
5078 assign_row (to
, from
);
5079 to
->enabled_p
= 1, from
->enabled_p
= 0;
5080 to
->overlapped_p
= to_overlapped_p
;
5084 /* Clear the hash table, for the next time. */
5085 for (i
= 0; i
< row_entry_idx
; ++i
)
5086 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5088 /* Value is > 0 to indicate that we scrolled the display. */
5094 /************************************************************************
5096 ************************************************************************/
5098 /* Update the desired frame matrix of frame F.
5100 FORCE_P non-zero means that the update should not be stopped by
5101 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5102 should not be tried.
5104 Value is non-zero if update was stopped due to pending input. */
5107 update_frame_1 (f
, force_p
, inhibit_id_p
)
5112 /* Frame matrices to work on. */
5113 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5114 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5117 int preempt_count
= baud_rate
/ 2400 + 1;
5118 extern int input_pending
;
5120 xassert (current_matrix
&& desired_matrix
);
5122 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5123 calculate_costs (f
);
5125 if (preempt_count
<= 0)
5128 if (redisplay_dont_pause
)
5130 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5136 /* If we cannot insert/delete lines, it's no use trying it. */
5137 if (!line_ins_del_ok
)
5140 /* See if any of the desired lines are enabled; don't compute for
5141 i/d line if just want cursor motion. */
5142 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5143 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5146 /* Try doing i/d line, if not yet inhibited. */
5147 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5148 force_p
|= scrolling (f
);
5150 /* Update the individual lines as needed. Do bottom line first. */
5151 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5152 update_frame_line (f
, desired_matrix
->nrows
- 1);
5154 /* Now update the rest of the lines. */
5155 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5157 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5159 if (FRAME_TERMCAP_P (f
))
5161 /* Flush out every so many lines.
5162 Also flush out if likely to have more than 1k buffered
5163 otherwise. I'm told that some telnet connections get
5164 really screwed by more than 1k output at once. */
5165 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5167 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5170 if (preempt_count
== 1)
5172 #ifdef EMACS_OUTQSIZE
5173 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5174 /* Probably not a tty. Ignore the error and reset
5176 outq
= PENDING_OUTPUT_COUNT (stdout
);
5179 if (baud_rate
<= outq
&& baud_rate
> 0)
5180 sleep (outq
/ baud_rate
);
5185 if ((i
- 1) % preempt_count
== 0)
5186 detect_input_pending_ignore_squeezables ();
5188 update_frame_line (f
, i
);
5192 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5194 /* Now just clean up termcap drivers and set cursor, etc. */
5197 if ((cursor_in_echo_area
5198 /* If we are showing a message instead of the mini-buffer,
5199 show the cursor for the message instead of for the
5200 (now hidden) mini-buffer contents. */
5201 || (EQ (minibuf_window
, selected_window
)
5202 && EQ (minibuf_window
, echo_area_window
)
5203 && !NILP (echo_area_buffer
[0])))
5204 /* These cases apply only to the frame that contains
5205 the active mini-buffer window. */
5206 && FRAME_HAS_MINIBUF_P (f
)
5207 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5209 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5212 if (cursor_in_echo_area
< 0)
5214 /* Negative value of cursor_in_echo_area means put
5215 cursor at beginning of line. */
5221 /* Positive value of cursor_in_echo_area means put
5222 cursor at the end of the prompt. If the mini-buffer
5223 is several lines high, find the last line that has
5225 row
= FRAME_LINES (f
);
5231 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5233 /* Frame rows are filled up with spaces that
5234 must be ignored here. */
5235 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5237 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5238 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5241 && (last
- 1)->charpos
< 0)
5247 while (row
> top
&& col
== 0);
5249 /* Make sure COL is not out of range. */
5250 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5252 /* If we have another row, advance cursor into it. */
5253 if (row
< FRAME_LINES (f
) - 1)
5255 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5258 /* Otherwise move it back in range. */
5260 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5264 cursor_to (row
, col
);
5268 /* We have only one cursor on terminal frames. Use it to
5269 display the cursor of the selected window. */
5270 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5271 if (w
->cursor
.vpos
>= 0
5272 /* The cursor vpos may be temporarily out of bounds
5273 in the following situation: There is one window,
5274 with the cursor in the lower half of it. The window
5275 is split, and a message causes a redisplay before
5276 a new cursor position has been computed. */
5277 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5279 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5280 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5282 if (INTEGERP (w
->left_margin_cols
))
5283 x
+= XFASTINT (w
->left_margin_cols
);
5285 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5293 clear_desired_matrices (f
);
5298 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5302 struct frame
*frame
;
5304 int unchanged_at_top
, unchanged_at_bottom
;
5307 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5308 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5309 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5310 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5312 int free_at_end_vpos
= FRAME_LINES (frame
);
5313 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5314 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5316 if (!current_matrix
)
5319 /* Compute hash codes of all the lines. Also calculate number of
5320 changed lines, number of unchanged lines at the beginning, and
5321 number of unchanged lines at the end. */
5323 unchanged_at_top
= 0;
5324 unchanged_at_bottom
= FRAME_LINES (frame
);
5325 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5327 /* Give up on this scrolling if some old lines are not enabled. */
5328 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5330 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5331 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5333 /* This line cannot be redrawn, so don't let scrolling mess it. */
5334 new_hash
[i
] = old_hash
[i
];
5335 #define INFINITY 1000000 /* Taken from scroll.c */
5336 draw_cost
[i
] = INFINITY
;
5340 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5341 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5344 if (old_hash
[i
] != new_hash
[i
])
5347 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5349 else if (i
== unchanged_at_top
)
5351 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5354 /* If changed lines are few, don't allow preemption, don't scroll. */
5355 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5356 || unchanged_at_bottom
== FRAME_LINES (frame
))
5359 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5360 - unchanged_at_bottom
);
5362 if (scroll_region_ok
)
5363 free_at_end_vpos
-= unchanged_at_bottom
;
5364 else if (memory_below_frame
)
5365 free_at_end_vpos
= -1;
5367 /* If large window, fast terminal and few lines in common between
5368 current frame and desired frame, don't bother with i/d calc. */
5369 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5371 10 * scrolling_max_lines_saved (unchanged_at_top
,
5372 FRAME_LINES (frame
) - unchanged_at_bottom
,
5373 old_hash
, new_hash
, draw_cost
)))
5376 if (window_size
< 2)
5379 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5380 draw_cost
+ unchanged_at_top
- 1,
5381 old_draw_cost
+ unchanged_at_top
- 1,
5382 old_hash
+ unchanged_at_top
- 1,
5383 new_hash
+ unchanged_at_top
- 1,
5384 free_at_end_vpos
- unchanged_at_top
);
5390 /* Count the number of blanks at the start of the vector of glyphs R
5391 which is LEN glyphs long. */
5394 count_blanks (r
, len
)
5400 for (i
= 0; i
< len
; ++i
)
5401 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5408 /* Count the number of glyphs in common at the start of the glyph
5409 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5410 of STR2. Value is the number of equal glyphs equal at the start. */
5413 count_match (str1
, end1
, str2
, end2
)
5414 struct glyph
*str1
, *end1
, *str2
, *end2
;
5416 struct glyph
*p1
= str1
;
5417 struct glyph
*p2
= str2
;
5421 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5428 /* Char insertion/deletion cost vector, from term.c */
5430 extern int *char_ins_del_vector
;
5431 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5434 /* Perform a frame-based update on line VPOS in frame FRAME. */
5437 update_frame_line (f
, vpos
)
5441 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5443 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5444 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5445 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5446 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5447 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5448 int must_write_whole_line_p
;
5449 int write_spaces_p
= must_write_spaces
;
5450 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5451 != FACE_TTY_DEFAULT_BG_COLOR
);
5453 if (colored_spaces_p
)
5456 /* Current row not enabled means it has unknown contents. We must
5457 write the whole desired line in that case. */
5458 must_write_whole_line_p
= !current_row
->enabled_p
;
5459 if (must_write_whole_line_p
)
5466 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5467 olen
= current_row
->used
[TEXT_AREA
];
5469 /* Ignore trailing spaces, if we can. */
5470 if (!write_spaces_p
)
5471 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5475 current_row
->enabled_p
= 1;
5476 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5478 /* If desired line is empty, just clear the line. */
5479 if (!desired_row
->enabled_p
)
5485 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5486 nlen
= desired_row
->used
[TEXT_AREA
];
5487 nend
= nbody
+ nlen
;
5489 /* If display line has unknown contents, write the whole line. */
5490 if (must_write_whole_line_p
)
5492 /* Ignore spaces at the end, if we can. */
5493 if (!write_spaces_p
)
5494 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5497 /* Write the contents of the desired line. */
5500 cursor_to (vpos
, 0);
5501 write_glyphs (nbody
, nlen
);
5504 /* Don't call clear_end_of_line if we already wrote the whole
5505 line. The cursor will not be at the right margin in that
5506 case but in the line below. */
5507 if (nlen
< FRAME_TOTAL_COLS (f
))
5509 cursor_to (vpos
, nlen
);
5510 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5513 /* Make sure we are in the right row, otherwise cursor movement
5514 with cmgoto might use `ch' in the wrong row. */
5515 cursor_to (vpos
, 0);
5517 make_current (desired_matrix
, current_matrix
, vpos
);
5521 /* Pretend trailing spaces are not there at all,
5522 unless for one reason or another we must write all spaces. */
5523 if (!write_spaces_p
)
5524 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5527 /* If there's no i/d char, quickly do the best we can without it. */
5528 if (!char_ins_del_ok
)
5532 /* Find the first glyph in desired row that doesn't agree with
5533 a glyph in the current row, and write the rest from there on. */
5534 for (i
= 0; i
< nlen
; i
++)
5536 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5538 /* Find the end of the run of different glyphs. */
5542 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5543 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5546 /* Output this run of non-matching chars. */
5547 cursor_to (vpos
, i
);
5548 write_glyphs (nbody
+ i
, j
- i
);
5551 /* Now find the next non-match. */
5555 /* Clear the rest of the line, or the non-clear part of it. */
5558 cursor_to (vpos
, nlen
);
5559 clear_end_of_line (olen
);
5562 /* Make current row = desired row. */
5563 make_current (desired_matrix
, current_matrix
, vpos
);
5567 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5568 characters in a row. */
5572 /* If current line is blank, skip over initial spaces, if
5573 possible, and write the rest. */
5577 nsp
= count_blanks (nbody
, nlen
);
5581 cursor_to (vpos
, nsp
);
5582 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5585 /* Exchange contents between current_frame and new_frame. */
5586 make_current (desired_matrix
, current_matrix
, vpos
);
5590 /* Compute number of leading blanks in old and new contents. */
5591 osp
= count_blanks (obody
, olen
);
5592 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5594 /* Compute number of matching chars starting with first non-blank. */
5595 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5596 nbody
+ nsp
, nbody
+ nlen
);
5598 /* Spaces in new match implicit space past the end of old. */
5599 /* A bug causing this to be a no-op was fixed in 18.29. */
5600 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5603 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5607 /* Avoid doing insert/delete char
5608 just cause number of leading spaces differs
5609 when the following text does not match. */
5610 if (begmatch
== 0 && osp
!= nsp
)
5611 osp
= nsp
= min (osp
, nsp
);
5613 /* Find matching characters at end of line */
5616 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5618 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5623 endmatch
= obody
+ olen
- op1
;
5625 /* tem gets the distance to insert or delete.
5626 endmatch is how many characters we save by doing so.
5629 tem
= (nlen
- nsp
) - (olen
- osp
);
5631 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5634 /* nsp - osp is the distance to insert or delete.
5635 If that is nonzero, begmatch is known to be nonzero also.
5636 begmatch + endmatch is how much we save by doing the ins/del.
5640 && (!char_ins_del_ok
5641 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5645 osp
= nsp
= min (osp
, nsp
);
5648 /* Now go through the line, inserting, writing and
5649 deleting as appropriate. */
5653 cursor_to (vpos
, nsp
);
5654 delete_glyphs (osp
- nsp
);
5658 /* If going to delete chars later in line
5659 and insert earlier in the line,
5660 must delete first to avoid losing data in the insert */
5661 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5663 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5664 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5665 olen
= nlen
- (nsp
- osp
);
5667 cursor_to (vpos
, osp
);
5668 insert_glyphs (0, nsp
- osp
);
5672 tem
= nsp
+ begmatch
+ endmatch
;
5673 if (nlen
!= tem
|| olen
!= tem
)
5675 if (!endmatch
|| nlen
== olen
)
5677 /* If new text being written reaches right margin, there is
5678 no need to do clear-to-eol at the end of this function
5679 (and it would not be safe, since cursor is not going to
5680 be "at the margin" after the text is done). */
5681 if (nlen
== FRAME_TOTAL_COLS (f
))
5684 /* Function write_glyphs is prepared to do nothing
5685 if passed a length <= 0. Check it here to avoid
5686 unnecessary cursor movement. */
5689 cursor_to (vpos
, nsp
+ begmatch
);
5690 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5693 else if (nlen
> olen
)
5695 /* Here, we used to have the following simple code:
5696 ----------------------------------------
5697 write_glyphs (nbody + nsp + begmatch, olen - tem);
5698 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5699 ----------------------------------------
5700 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5701 is a padding glyph. */
5702 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5705 cursor_to (vpos
, nsp
+ begmatch
);
5707 /* Calculate columns we can actually overwrite. */
5708 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5710 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5712 /* If we left columns to be overwritten, we must delete them. */
5713 del
= olen
- tem
- out
;
5715 delete_glyphs (del
);
5717 /* At last, we insert columns not yet written out. */
5718 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5721 else if (olen
> nlen
)
5723 cursor_to (vpos
, nsp
+ begmatch
);
5724 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5725 delete_glyphs (olen
- nlen
);
5731 /* If any unerased characters remain after the new line, erase them. */
5734 cursor_to (vpos
, nlen
);
5735 clear_end_of_line (olen
);
5738 /* Exchange contents between current_frame and new_frame. */
5739 make_current (desired_matrix
, current_matrix
, vpos
);
5744 /***********************************************************************
5745 X/Y Position -> Buffer Position
5746 ***********************************************************************/
5748 /* Determine what's under window-relative pixel position (*X, *Y).
5749 Return the object (string or buffer) that's there.
5750 Return in *POS the position in that object.
5751 Adjust *X and *Y to character positions. */
5754 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5757 struct display_pos
*pos
;
5758 Lisp_Object
*object
;
5760 int *width
, *height
;
5763 struct buffer
*old_current_buffer
= current_buffer
;
5764 struct text_pos startp
;
5766 struct glyph_row
*row
;
5767 #ifdef HAVE_WINDOW_SYSTEM
5768 struct image
*img
= 0;
5772 current_buffer
= XBUFFER (w
->buffer
);
5773 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5774 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5775 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5776 start_display (&it
, w
, startp
);
5778 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5779 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5780 MOVE_TO_X
| MOVE_TO_Y
);
5782 current_buffer
= old_current_buffer
;
5784 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5785 *dy
= *y
- it
.current_y
;
5788 if (STRINGP (it
.string
))
5792 #ifdef HAVE_WINDOW_SYSTEM
5793 if (it
.what
== IT_IMAGE
)
5795 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5796 && !NILP (img
->spec
))
5797 *object
= img
->spec
;
5801 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5804 if (it
.hpos
< row
->used
[TEXT_AREA
])
5806 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5807 #ifdef HAVE_WINDOW_SYSTEM
5810 *dy
-= row
->ascent
- glyph
->ascent
;
5811 *dx
+= glyph
->slice
.x
;
5812 *dy
+= glyph
->slice
.y
;
5813 /* Image slices positions are still relative to the entire image */
5814 *width
= img
->width
;
5815 *height
= img
->height
;
5820 *width
= glyph
->pixel_width
;
5821 *height
= glyph
->ascent
+ glyph
->descent
;
5827 *height
= row
->height
;
5832 *width
= *height
= 0;
5835 /* Add extra (default width) columns if clicked after EOL. */
5836 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5838 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5847 /* Value is the string under window-relative coordinates X/Y in the
5848 mode line or header line (PART says which) of window W, or nil if none.
5849 *CHARPOS is set to the position in the string returned. */
5852 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5854 enum window_part part
;
5857 Lisp_Object
*object
;
5859 int *width
, *height
;
5861 struct glyph_row
*row
;
5862 struct glyph
*glyph
, *end
;
5864 Lisp_Object string
= Qnil
;
5866 if (part
== ON_MODE_LINE
)
5867 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5869 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5871 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5873 if (row
->mode_line_p
&& row
->enabled_p
)
5875 /* Find the glyph under X. If we find one with a string object,
5876 it's the one we were looking for. */
5877 glyph
= row
->glyphs
[TEXT_AREA
];
5878 end
= glyph
+ row
->used
[TEXT_AREA
];
5879 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5880 x0
-= glyph
->pixel_width
;
5881 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5884 string
= glyph
->object
;
5885 *charpos
= glyph
->charpos
;
5886 *width
= glyph
->pixel_width
;
5887 *height
= glyph
->ascent
+ glyph
->descent
;
5888 #ifdef HAVE_WINDOW_SYSTEM
5889 if (glyph
->type
== IMAGE_GLYPH
)
5892 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5894 *object
= img
->spec
;
5895 y0
-= row
->ascent
- glyph
->ascent
;
5901 /* Add extra (default width) columns if clicked after EOL. */
5902 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5904 *height
= row
->height
;
5911 *width
= *height
= 0;
5921 /* Value is the string under window-relative coordinates X/Y in either
5922 marginal area, or nil if none. *CHARPOS is set to the position in
5923 the string returned. */
5926 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5928 enum window_part part
;
5931 Lisp_Object
*object
;
5933 int *width
, *height
;
5935 struct glyph_row
*row
= w
->current_matrix
->rows
;
5936 struct glyph
*glyph
, *end
;
5937 int x0
, y0
, i
, wy
= *y
;
5939 Lisp_Object string
= Qnil
;
5941 if (part
== ON_LEFT_MARGIN
)
5942 area
= LEFT_MARGIN_AREA
;
5943 else if (part
== ON_RIGHT_MARGIN
)
5944 area
= RIGHT_MARGIN_AREA
;
5948 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5949 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5952 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5956 /* Find the glyph under X. If we find one with a string object,
5957 it's the one we were looking for. */
5958 if (area
== RIGHT_MARGIN_AREA
)
5959 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5960 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5961 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5962 + window_box_width (w
, LEFT_MARGIN_AREA
)
5963 + window_box_width (w
, TEXT_AREA
));
5965 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5966 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5969 glyph
= row
->glyphs
[area
];
5970 end
= glyph
+ row
->used
[area
];
5971 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5972 x0
-= glyph
->pixel_width
;
5973 *x
= glyph
- row
->glyphs
[area
];
5976 string
= glyph
->object
;
5977 *charpos
= glyph
->charpos
;
5978 *width
= glyph
->pixel_width
;
5979 *height
= glyph
->ascent
+ glyph
->descent
;
5980 #ifdef HAVE_WINDOW_SYSTEM
5981 if (glyph
->type
== IMAGE_GLYPH
)
5984 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5986 *object
= img
->spec
;
5987 y0
-= row
->ascent
- glyph
->ascent
;
5988 x0
+= glyph
->slice
.x
;
5989 y0
+= glyph
->slice
.y
;
5995 /* Add extra (default width) columns if clicked after EOL. */
5996 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5998 *height
= row
->height
;
6005 *width
= *height
= 0;
6015 /***********************************************************************
6016 Changing Frame Sizes
6017 ***********************************************************************/
6022 window_change_signal (signalnum
) /* If we don't have an argument, */
6023 int signalnum
; /* some compilers complain in signal calls. */
6029 int old_errno
= errno
;
6031 signal (SIGWINCH
, window_change_signal
);
6032 SIGNAL_THREAD_CHECK (signalnum
);
6034 get_frame_size (&width
, &height
);
6036 /* The frame size change obviously applies to a termcap-controlled
6037 frame. Find such a frame in the list, and assume it's the only
6038 one (since the redisplay code always writes to stdout, not a
6039 FILE * specified in the frame structure). Record the new size,
6040 but don't reallocate the data structures now. Let that be done
6041 later outside of the signal handler. */
6044 Lisp_Object tail
, frame
;
6046 FOR_EACH_FRAME (tail
, frame
)
6048 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6050 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6058 #endif /* SIGWINCH */
6061 /* Do any change in frame size that was requested by a signal. SAFE
6062 non-zero means this function is called from a place where it is
6063 safe to change frame sizes while a redisplay is in progress. */
6066 do_pending_window_change (safe
)
6069 /* If window_change_signal should have run before, run it now. */
6070 if (redisplaying_p
&& !safe
)
6073 while (delayed_size_change
)
6075 Lisp_Object tail
, frame
;
6077 delayed_size_change
= 0;
6079 FOR_EACH_FRAME (tail
, frame
)
6081 struct frame
*f
= XFRAME (frame
);
6083 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6084 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6091 /* Change the frame height and/or width. Values may be given as zero to
6092 indicate no change is to take place.
6094 If DELAY is non-zero, then assume we're being called from a signal
6095 handler, and queue the change for later - perhaps the next
6096 redisplay. Since this tries to resize windows, we can't call it
6097 from a signal handler.
6099 SAFE non-zero means this function is called from a place where it's
6100 safe to change frame sizes while a redisplay is in progress. */
6103 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6104 register struct frame
*f
;
6105 int newheight
, newwidth
, pretend
, delay
, safe
;
6107 Lisp_Object tail
, frame
;
6109 if (! FRAME_WINDOW_P (f
))
6111 /* When using termcap, or on MS-DOS, all frames use
6112 the same screen, so a change in size affects all frames. */
6113 FOR_EACH_FRAME (tail
, frame
)
6114 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6115 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6116 pretend
, delay
, safe
);
6119 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6123 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6124 register struct frame
*f
;
6125 int newheight
, newwidth
, pretend
, delay
, safe
;
6127 int new_frame_total_cols
;
6128 int count
= SPECPDL_INDEX ();
6130 /* If we can't deal with the change now, queue it for later. */
6131 if (delay
|| (redisplaying_p
&& !safe
))
6133 f
->new_text_lines
= newheight
;
6134 f
->new_text_cols
= newwidth
;
6135 delayed_size_change
= 1;
6139 /* This size-change overrides any pending one for this frame. */
6140 f
->new_text_lines
= 0;
6141 f
->new_text_cols
= 0;
6143 /* If an argument is zero, set it to the current value. */
6145 newheight
= FRAME_LINES (f
);
6147 newwidth
= FRAME_COLS (f
);
6149 /* Compute width of windows in F.
6150 This is the width of the frame without vertical scroll bars. */
6151 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6153 /* Round up to the smallest acceptable size. */
6154 check_frame_size (f
, &newheight
, &newwidth
);
6156 /* If we're not changing the frame size, quit now. */
6157 if (newheight
== FRAME_LINES (f
)
6158 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6164 /* We only can set screen dimensions to certain values supported
6165 by our video hardware. Try to find the smallest size greater
6166 or equal to the requested dimensions. */
6167 dos_set_window_size (&newheight
, &newwidth
);
6170 if (newheight
!= FRAME_LINES (f
))
6172 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6174 /* Frame has both root and mini-buffer. */
6175 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6176 FRAME_TOP_MARGIN (f
));
6177 set_window_height (FRAME_ROOT_WINDOW (f
),
6180 - FRAME_TOP_MARGIN (f
)),
6182 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6184 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6187 /* Frame has just one top-level window. */
6188 set_window_height (FRAME_ROOT_WINDOW (f
),
6189 newheight
- FRAME_TOP_MARGIN (f
), 0);
6191 if (FRAME_TERMCAP_P (f
) && !pretend
)
6192 FrameRows
= newheight
;
6195 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6197 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6198 if (FRAME_HAS_MINIBUF_P (f
))
6199 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6201 if (FRAME_TERMCAP_P (f
) && !pretend
)
6202 FrameCols
= newwidth
;
6204 if (WINDOWP (f
->tool_bar_window
))
6205 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6208 FRAME_LINES (f
) = newheight
;
6209 SET_FRAME_COLS (f
, newwidth
);
6212 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6213 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6215 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6217 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6218 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6219 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6220 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6224 calculate_costs (f
);
6225 SET_FRAME_GARBAGED (f
);
6230 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6232 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6233 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6234 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6236 unbind_to (count
, Qnil
);
6241 /***********************************************************************
6242 Terminal Related Lisp Functions
6243 ***********************************************************************/
6245 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6246 1, 1, "FOpen termscript file: ",
6247 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6248 FILE = nil means just close any termscript file currently open. */)
6252 if (termscript
!= 0) fclose (termscript
);
6257 file
= Fexpand_file_name (file
, Qnil
);
6258 termscript
= fopen (SDATA (file
), "w");
6259 if (termscript
== 0)
6260 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6266 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6267 Ssend_string_to_terminal
, 1, 1, 0,
6268 doc
: /* Send STRING to the terminal without alteration.
6269 Control characters in STRING will have terminal-dependent effects. */)
6273 /* ??? Perhaps we should do something special for multibyte strings here. */
6274 CHECK_STRING (string
);
6275 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6279 fwrite (SDATA (string
), 1, SBYTES (string
),
6281 fflush (termscript
);
6287 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6288 doc
: /* Beep, or flash the screen.
6289 Also, unless an argument is given,
6290 terminate any keyboard macro currently executing. */)
6313 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6314 error ("Keyboard macro terminated by a command ringing the bell");
6322 /***********************************************************************
6324 ***********************************************************************/
6326 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6327 doc
: /* Pause, without updating display, for SECONDS seconds.
6328 SECONDS may be a floating-point value, meaning that you can wait for a
6329 fraction of a second. Optional second arg MILLISECONDS specifies an
6330 additional wait period, in milliseconds; this may be useful if your
6331 Emacs was built without floating point support.
6332 \(Not all operating systems support waiting for a fraction of a second.) */)
6333 (seconds
, milliseconds
)
6334 Lisp_Object seconds
, milliseconds
;
6338 if (NILP (milliseconds
))
6339 XSETINT (milliseconds
, 0);
6341 CHECK_NUMBER (milliseconds
);
6342 usec
= XINT (milliseconds
) * 1000;
6345 double duration
= extract_float (seconds
);
6346 sec
= (int) duration
;
6347 usec
+= (duration
- sec
) * 1000000;
6350 #ifndef EMACS_HAS_USECS
6351 if (sec
== 0 && usec
!= 0)
6352 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6355 /* Assure that 0 <= usec < 1000000. */
6358 /* We can't rely on the rounding being correct if usec is negative. */
6359 if (-1000000 < usec
)
6360 sec
--, usec
+= 1000000;
6362 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6365 sec
+= usec
/ 1000000, usec
%= 1000000;
6367 if (sec
< 0 || (sec
== 0 && usec
== 0))
6370 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6376 /* This is just like wait_reading_process_output, except that
6377 it does the redisplay.
6379 It's also much like Fsit_for, except that it can be used for
6380 waiting for input as well. */
6383 sit_for (sec
, usec
, reading
, display
, initial_display
)
6384 int sec
, usec
, reading
, display
, initial_display
;
6386 swallow_events (display
);
6388 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6391 if (initial_display
)
6392 redisplay_preserve_echo_area (2);
6394 if (sec
== 0 && usec
== 0)
6401 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6404 return detect_input_pending () ? Qnil
: Qt
;
6408 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6409 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6410 SECONDS may be a floating-point value, meaning that you can wait for a
6411 fraction of a second.
6412 \(Not all operating systems support waiting for a fraction of a second.)
6413 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6414 Redisplay is preempted as always if input arrives, and does not happen
6415 if input is available before it starts.
6416 Value is t if waited the full time with no input arriving.
6418 An obsolete but still supported form is
6419 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6420 Where the optional arg MILLISECONDS specifies an additional wait period,
6421 in milliseconds; this was useful when Emacs was built without
6422 floating point support.
6423 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6425 /* The `old-nodisp' stuff is there so that the arglist has the correct
6426 length. Otherwise, `defdvice' will redefine it with fewer args. */
6427 (seconds
, milliseconds
, nodisp
)
6428 Lisp_Object seconds
, milliseconds
, nodisp
;
6432 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6434 nodisp
= milliseconds
;
6435 milliseconds
= Qnil
;
6438 if (NILP (milliseconds
))
6439 XSETINT (milliseconds
, 0);
6441 CHECK_NUMBER (milliseconds
);
6442 usec
= XINT (milliseconds
) * 1000;
6445 double duration
= extract_float (seconds
);
6446 sec
= (int) duration
;
6447 usec
+= (duration
- sec
) * 1000000;
6450 #ifndef EMACS_HAS_USECS
6451 if (usec
!= 0 && sec
== 0)
6452 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6455 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6460 /***********************************************************************
6461 Other Lisp Functions
6462 ***********************************************************************/
6464 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6465 session's frames, frame names, buffers, buffer-read-only flags, and
6466 buffer-modified-flags, and a trailing sentinel (so we don't need to
6467 add length checks). */
6469 static Lisp_Object frame_and_buffer_state
;
6472 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6473 Sframe_or_buffer_changed_p
, 0, 0, 0,
6474 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6475 The state variable is an internal vector containing all frames and buffers,
6476 aside from buffers whose names start with space,
6477 along with the buffers' read-only and modified flags, which allows a fast
6478 check to see whether the menu bars might need to be recomputed.
6479 If this function returns non-nil, it updates the internal vector to reflect
6480 the current state. */)
6483 Lisp_Object tail
, frame
, buf
;
6487 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6488 FOR_EACH_FRAME (tail
, frame
)
6490 if (!EQ (*vecp
++, frame
))
6492 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6495 /* Check that the buffer info matches.
6496 No need to test for the end of the vector
6497 because the last element of the vector is lambda
6498 and that will always cause a mismatch. */
6499 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6501 buf
= XCDR (XCAR (tail
));
6502 /* Ignore buffers that aren't included in buffer lists. */
6503 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6505 if (!EQ (*vecp
++, buf
))
6507 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6509 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6512 /* Detect deletion of a buffer at the end of the list. */
6513 if (EQ (*vecp
, Qlambda
))
6516 /* Start with 1 so there is room for at least one lambda at the end. */
6518 FOR_EACH_FRAME (tail
, frame
)
6520 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6522 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6523 if (n
> XVECTOR (frame_and_buffer_state
)->size
6524 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6525 /* Add 20 extra so we grow it less often. */
6526 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6527 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6528 FOR_EACH_FRAME (tail
, frame
)
6531 *vecp
++ = XFRAME (frame
)->name
;
6533 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6535 buf
= XCDR (XCAR (tail
));
6536 /* Ignore buffers that aren't included in buffer lists. */
6537 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6540 *vecp
++ = XBUFFER (buf
)->read_only
;
6541 *vecp
++ = Fbuffer_modified_p (buf
);
6543 /* Fill up the vector with lambdas (always at least one). */
6545 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6546 < XVECTOR (frame_and_buffer_state
)->size
)
6548 /* Make sure we didn't overflow the vector. */
6549 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6550 > XVECTOR (frame_and_buffer_state
)->size
)
6557 /***********************************************************************
6559 ***********************************************************************/
6561 char *terminal_type
;
6563 /* Initialization done when Emacs fork is started, before doing stty.
6564 Determine terminal type and set terminal_driver. Then invoke its
6565 decoding routine to set up variables in the terminal package. */
6570 #ifdef HAVE_X_WINDOWS
6571 extern int display_arg
;
6574 /* Construct the space glyph. */
6575 space_glyph
.type
= CHAR_GLYPH
;
6576 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6577 space_glyph
.charpos
= -1;
6581 cursor_in_echo_area
= 0;
6582 terminal_type
= (char *) 0;
6584 /* Now is the time to initialize this; it's used by init_sys_modes
6586 Vwindow_system
= Qnil
;
6588 /* If the user wants to use a window system, we shouldn't bother
6589 initializing the terminal. This is especially important when the
6590 terminal is so dumb that emacs gives up before and doesn't bother
6591 using the window system.
6593 If the DISPLAY environment variable is set and nonempty,
6594 try to use X, and die with an error message if that doesn't work. */
6596 #ifdef HAVE_X_WINDOWS
6601 display
= getenv ("DECW$DISPLAY");
6603 display
= getenv ("DISPLAY");
6606 display_arg
= (display
!= 0 && *display
!= 0);
6609 if (!inhibit_window_system
&& display_arg
6615 Vwindow_system
= intern ("x");
6617 Vwindow_system_version
= make_number (11);
6619 Vwindow_system_version
= make_number (10);
6621 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6622 /* In some versions of ncurses,
6623 tputs crashes if we have not called tgetent.
6625 { char b
[2044]; tgetent (b
, "xterm");}
6627 adjust_frame_glyphs_initially ();
6630 #endif /* HAVE_X_WINDOWS */
6633 if (!inhibit_window_system
)
6635 Vwindow_system
= intern ("w32");
6636 Vwindow_system_version
= make_number (1);
6637 adjust_frame_glyphs_initially ();
6640 #endif /* HAVE_NTGUI */
6643 if (!inhibit_window_system
)
6645 Vwindow_system
= intern ("mac");
6646 Vwindow_system_version
= make_number (1);
6647 adjust_frame_glyphs_initially ();
6652 /* If no window system has been specified, try to use the terminal. */
6655 fatal ("standard input is not a tty");
6659 /* Look at the TERM variable. */
6660 terminal_type
= (char *) getenv ("TERM");
6664 fprintf (stderr
, "Please specify your terminal type.\n\
6665 For types defined in VMS, use set term /device=TYPE.\n\
6666 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6667 \(The quotation marks are necessary since terminal types are lower case.)\n");
6669 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6675 /* VMS DCL tends to up-case things, so down-case term type.
6676 Hardly any uppercase letters in terminal types; should be none. */
6678 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6681 strcpy (new, terminal_type
);
6683 for (p
= new; *p
; p
++)
6687 terminal_type
= new;
6691 term_init (terminal_type
);
6694 struct frame
*sf
= SELECTED_FRAME ();
6695 int width
= FRAME_TOTAL_COLS (sf
);
6696 int height
= FRAME_LINES (sf
);
6698 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6700 /* If these sizes are so big they cause overflow, just ignore the
6701 change. It's not clear what better we could do. */
6702 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6703 fatal ("screen size %dx%d too big", width
, height
);
6706 adjust_frame_glyphs_initially ();
6707 calculate_costs (XFRAME (selected_frame
));
6712 #endif /* CANNOT_DUMP */
6713 signal (SIGWINCH
, window_change_signal
);
6714 #endif /* SIGWINCH */
6716 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6720 /* The MSDOS terminal turns on its ``window system'' relatively
6721 late into the startup, so we cannot do the frame faces'
6722 initialization just yet. It will be done later by pc-win.el
6723 and internal_terminal_init. */
6724 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6726 && NILP (Vwindow_system
))
6728 /* For the initial frame, we don't have any way of knowing what
6729 are the foreground and background colors of the terminal. */
6730 struct frame
*sf
= SELECTED_FRAME();
6732 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6733 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6734 call0 (intern ("tty-set-up-initial-frame-faces"));
6740 /***********************************************************************
6742 ***********************************************************************/
6744 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6745 Sinternal_show_cursor
, 2, 2, 0,
6746 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6747 WINDOW nil means use the selected window. SHOW non-nil means
6748 show a cursor in WINDOW in the next redisplay. SHOW nil means
6749 don't show a cursor. */)
6751 Lisp_Object window
, show
;
6753 /* Don't change cursor state while redisplaying. This could confuse
6755 if (!redisplaying_p
)
6758 window
= selected_window
;
6760 CHECK_WINDOW (window
);
6762 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6769 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6770 Sinternal_show_cursor_p
, 0, 1, 0,
6771 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6772 WINDOW nil or omitted means report on the selected window. */)
6779 window
= selected_window
;
6781 CHECK_WINDOW (window
);
6783 w
= XWINDOW (window
);
6784 return w
->cursor_off_p
? Qnil
: Qt
;
6788 /***********************************************************************
6790 ***********************************************************************/
6795 defsubr (&Sredraw_frame
);
6796 defsubr (&Sredraw_display
);
6797 defsubr (&Sframe_or_buffer_changed_p
);
6798 defsubr (&Sopen_termscript
);
6800 defsubr (&Ssit_for
);
6801 defsubr (&Ssleep_for
);
6802 defsubr (&Ssend_string_to_terminal
);
6803 defsubr (&Sinternal_show_cursor
);
6804 defsubr (&Sinternal_show_cursor_p
);
6807 defsubr (&Sdump_redisplay_history
);
6810 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6811 staticpro (&frame_and_buffer_state
);
6813 Qdisplay_table
= intern ("display-table");
6814 staticpro (&Qdisplay_table
);
6815 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6816 staticpro (&Qredisplay_dont_pause
);
6818 DEFVAR_INT ("baud-rate", &baud_rate
,
6819 doc
: /* *The output baud rate of the terminal.
6820 On most systems, changing this value will affect the amount of padding
6821 and the other strategic decisions made during redisplay. */);
6823 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6824 doc
: /* *Non-nil means invert the entire frame display.
6825 This means everything is in inverse video which otherwise would not be. */);
6827 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6828 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6830 See also `ring-bell-function'. */);
6832 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6833 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6834 A non-nil value is useful if the terminal can automatically preserve
6835 Emacs's frame display when you reenter Emacs.
6836 It is up to you to set this variable if your terminal can do that. */);
6838 DEFVAR_LISP ("window-system", &Vwindow_system
,
6839 doc
: /* Name of window system that Emacs is displaying through.
6840 The value is a symbol--for instance, `x' for X windows.
6841 The value is nil if Emacs is using a text-only terminal. */);
6843 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6844 doc
: /* The version number of the window system in use.
6845 For X windows, this is 10 or 11. */);
6847 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6848 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6850 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6851 doc
: /* Table defining how to output a glyph code to the frame.
6852 If not nil, this is a vector indexed by glyph code to define the glyph.
6853 Each element can be:
6854 integer: a glyph code which this glyph is an alias for.
6855 string: output this glyph using that string (not impl. in X windows).
6856 nil: this glyph mod 524288 is the code of a character to output,
6857 and this glyph / 524288 is the face number (see `face-id') to use
6858 while outputting it. */);
6859 Vglyph_table
= Qnil
;
6861 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6862 doc
: /* Display table to use for buffers that specify none.
6863 See `buffer-display-table' for more information. */);
6864 Vstandard_display_table
= Qnil
;
6866 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6867 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6868 redisplay_dont_pause
= 0;
6870 /* Initialize `window-system', unless init_display already decided it. */
6875 Vwindow_system
= Qnil
;
6876 Vwindow_system_version
= Qnil
;
6880 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6881 (do not change this comment) */