1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 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"
40 #include "character.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 if (!row
->enabled_p
)
1191 /* Increment positions in glyphs. */
1192 for (area
= 0; area
< LAST_AREA
; ++area
)
1193 for (i
= 0; i
< row
->used
[area
]; ++i
)
1194 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1195 && row
->glyphs
[area
][i
].charpos
> 0)
1196 row
->glyphs
[area
][i
].charpos
+= delta
;
1198 /* Capture the case of rows displaying a line end. */
1199 if (row
->used
[TEXT_AREA
] == 0
1200 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1201 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1206 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1207 contents, i.e. glyph structure contents are exchanged between A and
1208 B without changing glyph pointers in A and B. */
1211 swap_glyphs_in_rows (a
, b
)
1212 struct glyph_row
*a
, *b
;
1216 for (area
= 0; area
< LAST_AREA
; ++area
)
1218 /* Number of glyphs to swap. */
1219 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1221 /* Start of glyphs in area of row A. */
1222 struct glyph
*glyph_a
= a
->glyphs
[area
];
1224 /* End + 1 of glyphs in area of row A. */
1225 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1227 /* Start of glyphs in area of row B. */
1228 struct glyph
*glyph_b
= b
->glyphs
[area
];
1230 while (glyph_a
< glyph_a_end
)
1232 /* Non-ISO HP/UX compiler doesn't like auto struct
1236 *glyph_a
= *glyph_b
;
1246 /* Exchange pointers to glyph memory between glyph rows A and B. */
1249 swap_glyph_pointers (a
, b
)
1250 struct glyph_row
*a
, *b
;
1253 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1255 struct glyph
*temp
= a
->glyphs
[i
];
1256 a
->glyphs
[i
] = b
->glyphs
[i
];
1257 b
->glyphs
[i
] = temp
;
1262 /* Copy glyph row structure FROM to glyph row structure TO, except
1263 that glyph pointers in the structures are left unchanged. */
1266 copy_row_except_pointers (to
, from
)
1267 struct glyph_row
*to
, *from
;
1269 struct glyph
*pointers
[1 + LAST_AREA
];
1271 /* Save glyph pointers of TO. */
1272 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1274 /* Do a structure assignment. */
1277 /* Restore original pointers of TO. */
1278 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1282 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1283 TO and FROM are left unchanged. Glyph contents are copied from the
1284 glyph memory of FROM to the glyph memory of TO. Increment buffer
1285 positions in row TO by DELTA/ DELTA_BYTES. */
1288 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1289 struct glyph_row
*to
, *from
;
1290 int delta
, delta_bytes
;
1294 /* This is like a structure assignment TO = FROM, except that
1295 glyph pointers in the rows are left unchanged. */
1296 copy_row_except_pointers (to
, from
);
1298 /* Copy glyphs from FROM to TO. */
1299 for (area
= 0; area
< LAST_AREA
; ++area
)
1300 if (from
->used
[area
])
1301 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1302 from
->used
[area
] * sizeof (struct glyph
));
1304 /* Increment buffer positions in TO by DELTA. */
1305 increment_row_positions (to
, delta
, delta_bytes
);
1309 /* Assign glyph row FROM to glyph row TO. This works like a structure
1310 assignment TO = FROM, except that glyph pointers are not copied but
1311 exchanged between TO and FROM. Pointers must be exchanged to avoid
1315 assign_row (to
, from
)
1316 struct glyph_row
*to
, *from
;
1318 swap_glyph_pointers (to
, from
);
1319 copy_row_except_pointers (to
, from
);
1323 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1324 a row in a window matrix, is a slice of the glyph memory of the
1325 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1326 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1327 memory of FRAME_ROW. */
1332 glyph_row_slice_p (window_row
, frame_row
)
1333 struct glyph_row
*window_row
, *frame_row
;
1335 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1336 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1337 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1339 return (frame_glyph_start
<= window_glyph_start
1340 && window_glyph_start
< frame_glyph_end
);
1343 #endif /* GLYPH_DEBUG */
1347 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1348 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1349 in WINDOW_MATRIX is found satisfying the condition. */
1351 static struct glyph_row
*
1352 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1353 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1358 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1360 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1361 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1362 frame_matrix
->rows
+ row
))
1365 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1370 /* Prepare ROW for display. Desired rows are cleared lazily,
1371 i.e. they are only marked as to be cleared by setting their
1372 enabled_p flag to zero. When a row is to be displayed, a prior
1373 call to this function really clears it. */
1376 prepare_desired_row (row
)
1377 struct glyph_row
*row
;
1379 if (!row
->enabled_p
)
1381 clear_glyph_row (row
);
1387 /* Return a hash code for glyph row ROW. */
1390 line_hash_code (row
)
1391 struct glyph_row
*row
;
1397 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1398 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1402 int c
= glyph
->u
.ch
;
1403 int face_id
= glyph
->face_id
;
1404 if (must_write_spaces
)
1406 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1407 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1419 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1420 the number of characters in the line. If must_write_spaces is
1421 zero, leading and trailing spaces are ignored. */
1424 line_draw_cost (matrix
, vpos
)
1425 struct glyph_matrix
*matrix
;
1428 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1429 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1430 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1432 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1433 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1435 /* Ignore trailing and leading spaces if we can. */
1436 if (!must_write_spaces
)
1438 /* Skip from the end over trailing spaces. */
1439 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1442 /* All blank line. */
1446 /* Skip over leading spaces. */
1447 while (CHAR_GLYPH_SPACE_P (*beg
))
1451 /* If we don't have a glyph-table, each glyph is one character,
1452 so return the number of glyphs. */
1453 if (glyph_table_base
== 0)
1457 /* Otherwise, scan the glyphs and accumulate their total length
1462 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1465 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1468 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1478 /* Test two glyph rows A and B for equality. Value is non-zero if A
1479 and B have equal contents. W is the window to which the glyphs
1480 rows A and B belong. It is needed here to test for partial row
1481 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1482 flags of A and B, too. */
1485 row_equal_p (w
, a
, b
, mouse_face_p
)
1487 struct glyph_row
*a
, *b
;
1492 else if (a
->hash
!= b
->hash
)
1496 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1499 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1502 /* Compare glyphs. */
1503 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1505 if (a
->used
[area
] != b
->used
[area
])
1508 a_glyph
= a
->glyphs
[area
];
1509 a_end
= a_glyph
+ a
->used
[area
];
1510 b_glyph
= b
->glyphs
[area
];
1512 while (a_glyph
< a_end
1513 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1514 ++a_glyph
, ++b_glyph
;
1516 if (a_glyph
!= a_end
)
1520 if (a
->fill_line_p
!= b
->fill_line_p
1521 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1522 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1523 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1524 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1525 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1526 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1527 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1528 || a
->overlapped_p
!= b
->overlapped_p
1529 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1530 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1531 /* Different partially visible characters on left margin. */
1533 /* Different height. */
1534 || a
->ascent
!= b
->ascent
1535 || a
->phys_ascent
!= b
->phys_ascent
1536 || a
->phys_height
!= b
->phys_height
1537 || a
->visible_height
!= b
->visible_height
)
1546 /***********************************************************************
1549 See dispextern.h for an overall explanation of glyph pools.
1550 ***********************************************************************/
1552 /* Allocate a glyph_pool structure. The structure returned is
1553 initialized with zeros. The global variable glyph_pool_count is
1554 incremented for each pool allocated. */
1556 static struct glyph_pool
*
1559 struct glyph_pool
*result
;
1561 /* Allocate a new glyph_pool and clear it. */
1562 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1563 bzero (result
, sizeof *result
);
1565 /* For memory leak and double deletion checking. */
1572 /* Free a glyph_pool structure POOL. The function may be called with
1573 a null POOL pointer. The global variable glyph_pool_count is
1574 decremented with every pool structure freed. If this count gets
1575 negative, more structures were freed than allocated, i.e. one
1576 structure must have been freed more than once or a bogus pointer
1577 was passed to free_glyph_pool. */
1580 free_glyph_pool (pool
)
1581 struct glyph_pool
*pool
;
1585 /* More freed than allocated? */
1587 xassert (glyph_pool_count
>= 0);
1589 xfree (pool
->glyphs
);
1595 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1596 columns we need. This function never shrinks a pool. The only
1597 case in which this would make sense, would be when a frame's size
1598 is changed from a large value to a smaller one. But, if someone
1599 does it once, we can expect that he will do it again.
1601 Value is non-zero if the pool changed in a way which makes
1602 re-adjusting window glyph matrices necessary. */
1605 realloc_glyph_pool (pool
, matrix_dim
)
1606 struct glyph_pool
*pool
;
1607 struct dim matrix_dim
;
1612 changed_p
= (pool
->glyphs
== 0
1613 || matrix_dim
.height
!= pool
->nrows
1614 || matrix_dim
.width
!= pool
->ncolumns
);
1616 /* Enlarge the glyph pool. */
1617 needed
= matrix_dim
.width
* matrix_dim
.height
;
1618 if (needed
> pool
->nglyphs
)
1620 int size
= needed
* sizeof (struct glyph
);
1623 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1626 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1627 bzero (pool
->glyphs
, size
);
1630 pool
->nglyphs
= needed
;
1633 /* Remember the number of rows and columns because (a) we use them
1634 to do sanity checks, and (b) the number of columns determines
1635 where rows in the frame matrix start---this must be available to
1636 determine pointers to rows of window sub-matrices. */
1637 pool
->nrows
= matrix_dim
.height
;
1638 pool
->ncolumns
= matrix_dim
.width
;
1645 /***********************************************************************
1647 ***********************************************************************/
1652 /* Flush standard output. This is sometimes useful to call from
1662 /* Check that no glyph pointers have been lost in MATRIX. If a
1663 pointer has been lost, e.g. by using a structure assignment between
1664 rows, at least one pointer must occur more than once in the rows of
1668 check_matrix_pointer_lossage (matrix
)
1669 struct glyph_matrix
*matrix
;
1673 for (i
= 0; i
< matrix
->nrows
; ++i
)
1674 for (j
= 0; j
< matrix
->nrows
; ++j
)
1676 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1677 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1681 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1684 matrix_row (matrix
, row
)
1685 struct glyph_matrix
*matrix
;
1688 xassert (matrix
&& matrix
->rows
);
1689 xassert (row
>= 0 && row
< matrix
->nrows
);
1691 /* That's really too slow for normal testing because this function
1692 is called almost everywhere. Although---it's still astonishingly
1693 fast, so it is valuable to have for debugging purposes. */
1695 check_matrix_pointer_lossage (matrix
);
1698 return matrix
->rows
+ row
;
1702 #if 0 /* This function makes invalid assumptions when text is
1703 partially invisible. But it might come handy for debugging
1706 /* Check invariants that must hold for an up to date current matrix of
1710 check_matrix_invariants (w
)
1713 struct glyph_matrix
*matrix
= w
->current_matrix
;
1714 int yb
= window_text_bottom_y (w
);
1715 struct glyph_row
*row
= matrix
->rows
;
1716 struct glyph_row
*last_text_row
= NULL
;
1717 struct buffer
*saved
= current_buffer
;
1718 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1721 /* This can sometimes happen for a fresh window. */
1722 if (matrix
->nrows
< 2)
1725 set_buffer_temp (buffer
);
1727 /* Note: last row is always reserved for the mode line. */
1728 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1729 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1731 struct glyph_row
*next
= row
+ 1;
1733 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1734 last_text_row
= row
;
1736 /* Check that character and byte positions are in sync. */
1737 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1738 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1740 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1741 have such a position temporarily in case of a minibuffer
1742 displaying something like `[Sole completion]' at its end. */
1743 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1744 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1745 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1747 /* Check that end position of `row' is equal to start position
1749 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1751 xassert (MATRIX_ROW_END_CHARPOS (row
)
1752 == MATRIX_ROW_START_CHARPOS (next
));
1753 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1754 == MATRIX_ROW_START_BYTEPOS (next
));
1759 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1760 xassert (w
->desired_matrix
->rows
!= NULL
);
1761 set_buffer_temp (saved
);
1766 #endif /* GLYPH_DEBUG != 0 */
1770 /**********************************************************************
1771 Allocating/ Adjusting Glyph Matrices
1772 **********************************************************************/
1774 /* Allocate glyph matrices over a window tree for a frame-based
1777 X and Y are column/row within the frame glyph matrix where
1778 sub-matrices for the window tree rooted at WINDOW must be
1779 allocated. CH_DIM contains the dimensions of the smallest
1780 character that could be used during display. DIM_ONLY_P non-zero
1781 means that the caller of this function is only interested in the
1782 result matrix dimension, and matrix adjustments should not be
1785 The function returns the total width/height of the sub-matrices of
1786 the window tree. If called on a frame root window, the computation
1787 will take the mini-buffer window into account.
1789 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1791 NEW_LEAF_MATRIX set if any window in the tree did not have a
1792 glyph matrices yet, and
1794 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1795 any window in the tree will be changed or have been changed (see
1798 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1801 Windows are arranged into chains of windows on the same level
1802 through the next fields of window structures. Such a level can be
1803 either a sequence of horizontally adjacent windows from left to
1804 right, or a sequence of vertically adjacent windows from top to
1805 bottom. Each window in a horizontal sequence can be either a leaf
1806 window or a vertical sequence; a window in a vertical sequence can
1807 be either a leaf or a horizontal sequence. All windows in a
1808 horizontal sequence have the same height, and all windows in a
1809 vertical sequence have the same width.
1811 This function uses, for historical reasons, a more general
1812 algorithm to determine glyph matrix dimensions that would be
1815 The matrix height of a horizontal sequence is determined by the
1816 maximum height of any matrix in the sequence. The matrix width of
1817 a horizontal sequence is computed by adding up matrix widths of
1818 windows in the sequence.
1820 |<------- result width ------->|
1821 +---------+----------+---------+ ---
1824 +---------+ | | result height
1829 The matrix width of a vertical sequence is the maximum matrix width
1830 of any window in the sequence. Its height is computed by adding up
1831 matrix heights of windows in the sequence.
1833 |<---- result width -->|
1841 +------------+---------+ |
1844 +------------+---------+ --- */
1846 /* Bit indicating that a new matrix will be allocated or has been
1849 #define NEW_LEAF_MATRIX (1 << 0)
1851 /* Bit indicating that a matrix will or has changed its location or
1854 #define CHANGED_LEAF_MATRIX (1 << 1)
1857 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1858 window_change_flags
)
1862 int *window_change_flags
;
1864 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1866 int wmax
= 0, hmax
= 0;
1870 int in_horz_combination_p
;
1872 /* What combination is WINDOW part of? Compute this once since the
1873 result is the same for all windows in the `next' chain. The
1874 special case of a root window (parent equal to nil) is treated
1875 like a vertical combination because a root window's `next'
1876 points to the mini-buffer window, if any, which is arranged
1877 vertically below other windows. */
1878 in_horz_combination_p
1879 = (!NILP (XWINDOW (window
)->parent
)
1880 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1882 /* For WINDOW and all windows on the same level. */
1885 w
= XWINDOW (window
);
1887 /* Get the dimension of the window sub-matrix for W, depending
1888 on whether this is a combination or a leaf window. */
1889 if (!NILP (w
->hchild
))
1890 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1892 window_change_flags
);
1893 else if (!NILP (w
->vchild
))
1894 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1896 window_change_flags
);
1899 /* If not already done, allocate sub-matrix structures. */
1900 if (w
->desired_matrix
== NULL
)
1902 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1903 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1904 *window_change_flags
|= NEW_LEAF_MATRIX
;
1907 /* Width and height MUST be chosen so that there are no
1908 holes in the frame matrix. */
1909 dim
.width
= required_matrix_width (w
);
1910 dim
.height
= required_matrix_height (w
);
1912 /* Will matrix be re-allocated? */
1913 if (x
!= w
->desired_matrix
->matrix_x
1914 || y
!= w
->desired_matrix
->matrix_y
1915 || dim
.width
!= w
->desired_matrix
->matrix_w
1916 || dim
.height
!= w
->desired_matrix
->matrix_h
1917 || (margin_glyphs_to_reserve (w
, dim
.width
,
1918 w
->left_margin_cols
)
1919 != w
->desired_matrix
->left_margin_glyphs
)
1920 || (margin_glyphs_to_reserve (w
, dim
.width
,
1921 w
->right_margin_cols
)
1922 != w
->desired_matrix
->right_margin_glyphs
))
1923 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1925 /* Actually change matrices, if allowed. Do not consider
1926 CHANGED_LEAF_MATRIX computed above here because the pool
1927 may have been changed which we don't now here. We trust
1928 that we only will be called with DIM_ONLY_P != 0 when
1932 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1933 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1937 /* If we are part of a horizontal combination, advance x for
1938 windows to the right of W; otherwise advance y for windows
1940 if (in_horz_combination_p
)
1945 /* Remember maximum glyph matrix dimensions. */
1946 wmax
= max (wmax
, dim
.width
);
1947 hmax
= max (hmax
, dim
.height
);
1949 /* Next window on same level. */
1952 while (!NILP (window
));
1954 /* Set `total' to the total glyph matrix dimension of this window
1955 level. In a vertical combination, the width is the width of the
1956 widest window; the height is the y we finally reached, corrected
1957 by the y we started with. In a horizontal combination, the total
1958 height is the height of the tallest window, and the width is the
1959 x we finally reached, corrected by the x we started with. */
1960 if (in_horz_combination_p
)
1962 total
.width
= x
- x0
;
1963 total
.height
= hmax
;
1968 total
.height
= y
- y0
;
1975 /* Return the required height of glyph matrices for window W. */
1978 required_matrix_height (w
)
1981 #ifdef HAVE_WINDOW_SYSTEM
1982 struct frame
*f
= XFRAME (w
->frame
);
1984 if (FRAME_WINDOW_P (f
))
1986 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1987 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1988 return (((window_pixel_height
+ ch_height
- 1)
1989 / ch_height
) * w
->nrows_scale_factor
1990 /* One partially visible line at the top and
1991 bottom of the window. */
1993 /* 2 for header and mode line. */
1996 #endif /* HAVE_WINDOW_SYSTEM */
1998 return WINDOW_TOTAL_LINES (w
);
2002 /* Return the required width of glyph matrices for window W. */
2005 required_matrix_width (w
)
2008 #ifdef HAVE_WINDOW_SYSTEM
2009 struct frame
*f
= XFRAME (w
->frame
);
2010 if (FRAME_WINDOW_P (f
))
2012 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2013 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2015 /* Compute number of glyphs needed in a glyph row. */
2016 return (((window_pixel_width
+ ch_width
- 1)
2017 / ch_width
) * w
->ncols_scale_factor
2018 /* 2 partially visible columns in the text area. */
2020 /* One partially visible column at the right
2021 edge of each marginal area. */
2024 #endif /* HAVE_WINDOW_SYSTEM */
2026 return XINT (w
->total_cols
);
2030 /* Allocate window matrices for window-based redisplay. W is the
2031 window whose matrices must be allocated/reallocated. CH_DIM is the
2032 size of the smallest character that could potentially be used on W. */
2035 allocate_matrices_for_window_redisplay (w
)
2040 if (!NILP (w
->vchild
))
2041 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2042 else if (!NILP (w
->hchild
))
2043 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2046 /* W is a leaf window. */
2049 /* If matrices are not yet allocated, allocate them now. */
2050 if (w
->desired_matrix
== NULL
)
2052 w
->desired_matrix
= new_glyph_matrix (NULL
);
2053 w
->current_matrix
= new_glyph_matrix (NULL
);
2056 dim
.width
= required_matrix_width (w
);
2057 dim
.height
= required_matrix_height (w
);
2058 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2059 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2062 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2067 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2068 do it for all frames; otherwise do it just for the given frame.
2069 This function must be called when a new frame is created, its size
2070 changes, or its window configuration changes. */
2076 /* Block input so that expose events and other events that access
2077 glyph matrices are not processed while we are changing them. */
2081 adjust_frame_glyphs (f
);
2084 Lisp_Object tail
, lisp_frame
;
2086 FOR_EACH_FRAME (tail
, lisp_frame
)
2087 adjust_frame_glyphs (XFRAME (lisp_frame
));
2094 /* Adjust frame glyphs when Emacs is initialized.
2096 To be called from init_display.
2098 We need a glyph matrix because redraw will happen soon.
2099 Unfortunately, window sizes on selected_frame are not yet set to
2100 meaningful values. I believe we can assume that there are only two
2101 windows on the frame---the mini-buffer and the root window. Frame
2102 height and width seem to be correct so far. So, set the sizes of
2103 windows to estimated values. */
2106 adjust_frame_glyphs_initially ()
2108 struct frame
*sf
= SELECTED_FRAME ();
2109 struct window
*root
= XWINDOW (sf
->root_window
);
2110 struct window
*mini
= XWINDOW (root
->next
);
2111 int frame_lines
= FRAME_LINES (sf
);
2112 int frame_cols
= FRAME_COLS (sf
);
2113 int top_margin
= FRAME_TOP_MARGIN (sf
);
2115 /* Do it for the root window. */
2116 XSETFASTINT (root
->top_line
, top_margin
);
2117 XSETFASTINT (root
->total_cols
, frame_cols
);
2118 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2120 /* Do it for the mini-buffer window. */
2121 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2122 XSETFASTINT (mini
->total_cols
, frame_cols
);
2123 set_window_height (root
->next
, 1, 0);
2125 adjust_frame_glyphs (sf
);
2126 glyphs_initialized_initially_p
= 1;
2130 /* Allocate/reallocate glyph matrices of a single frame F. */
2133 adjust_frame_glyphs (f
)
2136 if (FRAME_WINDOW_P (f
))
2137 adjust_frame_glyphs_for_window_redisplay (f
);
2139 adjust_frame_glyphs_for_frame_redisplay (f
);
2141 /* Don't forget the message buffer and the buffer for
2142 decode_mode_spec. */
2143 adjust_frame_message_buffer (f
);
2144 adjust_decode_mode_spec_buffer (f
);
2146 f
->glyphs_initialized_p
= 1;
2150 /* In the window tree with root W, build current matrices of leaf
2151 windows from the frame's current matrix. */
2154 fake_current_matrices (window
)
2159 for (; !NILP (window
); window
= w
->next
)
2161 w
= XWINDOW (window
);
2163 if (!NILP (w
->hchild
))
2164 fake_current_matrices (w
->hchild
);
2165 else if (!NILP (w
->vchild
))
2166 fake_current_matrices (w
->vchild
);
2170 struct frame
*f
= XFRAME (w
->frame
);
2171 struct glyph_matrix
*m
= w
->current_matrix
;
2172 struct glyph_matrix
*fm
= f
->current_matrix
;
2174 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2175 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2177 for (i
= 0; i
< m
->matrix_h
; ++i
)
2179 struct glyph_row
*r
= m
->rows
+ i
;
2180 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2182 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2183 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2185 r
->enabled_p
= fr
->enabled_p
;
2188 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2189 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2190 r
->used
[TEXT_AREA
] = (m
->matrix_w
2191 - r
->used
[LEFT_MARGIN_AREA
]
2192 - r
->used
[RIGHT_MARGIN_AREA
]);
2201 /* Save away the contents of frame F's current frame matrix. Value is
2202 a glyph matrix holding the contents of F's current frame matrix. */
2204 static struct glyph_matrix
*
2205 save_current_matrix (f
)
2209 struct glyph_matrix
*saved
;
2211 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2212 bzero (saved
, sizeof *saved
);
2213 saved
->nrows
= f
->current_matrix
->nrows
;
2214 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2215 * sizeof *saved
->rows
);
2216 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2218 for (i
= 0; i
< saved
->nrows
; ++i
)
2220 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2221 struct glyph_row
*to
= saved
->rows
+ i
;
2222 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2223 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2224 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2225 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2232 /* Restore the contents of frame F's current frame matrix from SAVED,
2233 and free memory associated with SAVED. */
2236 restore_current_matrix (f
, saved
)
2238 struct glyph_matrix
*saved
;
2242 for (i
= 0; i
< saved
->nrows
; ++i
)
2244 struct glyph_row
*from
= saved
->rows
+ i
;
2245 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2246 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2247 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2248 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2249 xfree (from
->glyphs
[TEXT_AREA
]);
2252 xfree (saved
->rows
);
2258 /* Allocate/reallocate glyph matrices of a single frame F for
2259 frame-based redisplay. */
2262 adjust_frame_glyphs_for_frame_redisplay (f
)
2265 struct dim matrix_dim
;
2267 int window_change_flags
;
2270 if (!FRAME_LIVE_P (f
))
2273 top_window_y
= FRAME_TOP_MARGIN (f
);
2275 /* Allocate glyph pool structures if not already done. */
2276 if (f
->desired_pool
== NULL
)
2278 f
->desired_pool
= new_glyph_pool ();
2279 f
->current_pool
= new_glyph_pool ();
2282 /* Allocate frames matrix structures if needed. */
2283 if (f
->desired_matrix
== NULL
)
2285 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2286 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2289 /* Compute window glyph matrices. (This takes the mini-buffer
2290 window into account). The result is the size of the frame glyph
2291 matrix needed. The variable window_change_flags is set to a bit
2292 mask indicating whether new matrices will be allocated or
2293 existing matrices change their size or location within the frame
2295 window_change_flags
= 0;
2297 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2300 &window_change_flags
);
2302 /* Add in menu bar lines, if any. */
2303 matrix_dim
.height
+= top_window_y
;
2305 /* Enlarge pools as necessary. */
2306 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2307 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2309 /* Set up glyph pointers within window matrices. Do this only if
2310 absolutely necessary since it requires a frame redraw. */
2311 if (pool_changed_p
|| window_change_flags
)
2313 /* Do it for window matrices. */
2314 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2316 &window_change_flags
);
2318 /* Size of frame matrices must equal size of frame. Note
2319 that we are called for X frames with window widths NOT equal
2320 to the frame width (from CHANGE_FRAME_SIZE_1). */
2321 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2322 && matrix_dim
.height
== FRAME_LINES (f
));
2324 /* Pointers to glyph memory in glyph rows are exchanged during
2325 the update phase of redisplay, which means in general that a
2326 frame's current matrix consists of pointers into both the
2327 desired and current glyph pool of the frame. Adjusting a
2328 matrix sets the frame matrix up so that pointers are all into
2329 the same pool. If we want to preserve glyph contents of the
2330 current matrix over a call to adjust_glyph_matrix, we must
2331 make a copy of the current glyphs, and restore the current
2332 matrix' contents from that copy. */
2333 if (display_completed
2334 && !FRAME_GARBAGED_P (f
)
2335 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2336 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2338 struct glyph_matrix
*copy
= save_current_matrix (f
);
2339 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2340 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2341 restore_current_matrix (f
, copy
);
2342 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2346 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2347 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2348 SET_FRAME_GARBAGED (f
);
2354 /* Allocate/reallocate glyph matrices of a single frame F for
2355 window-based redisplay. */
2358 adjust_frame_glyphs_for_window_redisplay (f
)
2363 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2365 /* Allocate/reallocate window matrices. */
2366 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2368 /* Allocate/ reallocate matrices of the dummy window used to display
2369 the menu bar under X when no X toolkit support is available. */
2370 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2372 /* Allocate a dummy window if not already done. */
2373 if (NILP (f
->menu_bar_window
))
2375 f
->menu_bar_window
= make_window ();
2376 w
= XWINDOW (f
->menu_bar_window
);
2377 XSETFRAME (w
->frame
, f
);
2378 w
->pseudo_window_p
= 1;
2381 w
= XWINDOW (f
->menu_bar_window
);
2383 /* Set window dimensions to frame dimensions and allocate or
2384 adjust glyph matrices of W. */
2385 XSETFASTINT (w
->top_line
, 0);
2386 XSETFASTINT (w
->left_col
, 0);
2387 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2388 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2389 allocate_matrices_for_window_redisplay (w
);
2391 #endif /* not USE_X_TOOLKIT */
2394 /* Allocate/ reallocate matrices of the tool bar window. If we
2395 don't have a tool bar window yet, make one. */
2396 if (NILP (f
->tool_bar_window
))
2398 f
->tool_bar_window
= make_window ();
2399 w
= XWINDOW (f
->tool_bar_window
);
2400 XSETFRAME (w
->frame
, f
);
2401 w
->pseudo_window_p
= 1;
2404 w
= XWINDOW (f
->tool_bar_window
);
2406 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2407 XSETFASTINT (w
->left_col
, 0);
2408 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2409 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2410 allocate_matrices_for_window_redisplay (w
);
2415 /* Adjust/ allocate message buffer of frame F.
2417 Note that the message buffer is never freed. Since I could not
2418 find a free in 19.34, I assume that freeing it would be
2419 problematic in some way and don't do it either.
2421 (Implementation note: It should be checked if we can free it
2422 eventually without causing trouble). */
2425 adjust_frame_message_buffer (f
)
2428 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2430 if (FRAME_MESSAGE_BUF (f
))
2432 char *buffer
= FRAME_MESSAGE_BUF (f
);
2433 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2434 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2437 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2441 /* Re-allocate buffer for decode_mode_spec on frame F. */
2444 adjust_decode_mode_spec_buffer (f
)
2447 f
->decode_mode_spec_buffer
2448 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2449 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2454 /**********************************************************************
2455 Freeing Glyph Matrices
2456 **********************************************************************/
2458 /* Free glyph memory for a frame F. F may be null. This function can
2459 be called for the same frame more than once. The root window of
2460 F may be nil when this function is called. This is the case when
2461 the function is called when F is destroyed. */
2467 if (f
&& f
->glyphs_initialized_p
)
2469 /* Block interrupt input so that we don't get surprised by an X
2470 event while we're in an inconsistent state. */
2472 f
->glyphs_initialized_p
= 0;
2474 /* Release window sub-matrices. */
2475 if (!NILP (f
->root_window
))
2476 free_window_matrices (XWINDOW (f
->root_window
));
2478 /* Free the dummy window for menu bars without X toolkit and its
2480 if (!NILP (f
->menu_bar_window
))
2482 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2483 free_glyph_matrix (w
->desired_matrix
);
2484 free_glyph_matrix (w
->current_matrix
);
2485 w
->desired_matrix
= w
->current_matrix
= NULL
;
2486 f
->menu_bar_window
= Qnil
;
2489 /* Free the tool bar window and its glyph matrices. */
2490 if (!NILP (f
->tool_bar_window
))
2492 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2493 free_glyph_matrix (w
->desired_matrix
);
2494 free_glyph_matrix (w
->current_matrix
);
2495 w
->desired_matrix
= w
->current_matrix
= NULL
;
2496 f
->tool_bar_window
= Qnil
;
2499 /* Release frame glyph matrices. Reset fields to zero in
2500 case we are called a second time. */
2501 if (f
->desired_matrix
)
2503 free_glyph_matrix (f
->desired_matrix
);
2504 free_glyph_matrix (f
->current_matrix
);
2505 f
->desired_matrix
= f
->current_matrix
= NULL
;
2508 /* Release glyph pools. */
2509 if (f
->desired_pool
)
2511 free_glyph_pool (f
->desired_pool
);
2512 free_glyph_pool (f
->current_pool
);
2513 f
->desired_pool
= f
->current_pool
= NULL
;
2521 /* Free glyph sub-matrices in the window tree rooted at W. This
2522 function may be called with a null pointer, and it may be called on
2523 the same tree more than once. */
2526 free_window_matrices (w
)
2531 if (!NILP (w
->hchild
))
2532 free_window_matrices (XWINDOW (w
->hchild
));
2533 else if (!NILP (w
->vchild
))
2534 free_window_matrices (XWINDOW (w
->vchild
));
2537 /* This is a leaf window. Free its memory and reset fields
2538 to zero in case this function is called a second time for
2540 free_glyph_matrix (w
->current_matrix
);
2541 free_glyph_matrix (w
->desired_matrix
);
2542 w
->current_matrix
= w
->desired_matrix
= NULL
;
2545 /* Next window on same level. */
2546 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2551 /* Check glyph memory leaks. This function is called from
2552 shut_down_emacs. Note that frames are not destroyed when Emacs
2553 exits. We therefore free all glyph memory for all active frames
2554 explicitly and check that nothing is left allocated. */
2557 check_glyph_memory ()
2559 Lisp_Object tail
, frame
;
2561 /* Free glyph memory for all frames. */
2562 FOR_EACH_FRAME (tail
, frame
)
2563 free_glyphs (XFRAME (frame
));
2565 /* Check that nothing is left allocated. */
2566 if (glyph_matrix_count
)
2568 if (glyph_pool_count
)
2574 /**********************************************************************
2575 Building a Frame Matrix
2576 **********************************************************************/
2578 /* Most of the redisplay code works on glyph matrices attached to
2579 windows. This is a good solution most of the time, but it is not
2580 suitable for terminal code. Terminal output functions cannot rely
2581 on being able to set an arbitrary terminal window. Instead they
2582 must be provided with a view of the whole frame, i.e. the whole
2583 screen. We build such a view by constructing a frame matrix from
2584 window matrices in this section.
2586 Windows that must be updated have their must_be_update_p flag set.
2587 For all such windows, their desired matrix is made part of the
2588 desired frame matrix. For other windows, their current matrix is
2589 made part of the desired frame matrix.
2591 +-----------------+----------------+
2592 | desired | desired |
2594 +-----------------+----------------+
2597 +----------------------------------+
2599 Desired window matrices can be made part of the frame matrix in a
2600 cheap way: We exploit the fact that the desired frame matrix and
2601 desired window matrices share their glyph memory. This is not
2602 possible for current window matrices. Their glyphs are copied to
2603 the desired frame matrix. The latter is equivalent to
2604 preserve_other_columns in the old redisplay.
2606 Used glyphs counters for frame matrix rows are the result of adding
2607 up glyph lengths of the window matrices. A line in the frame
2608 matrix is enabled, if a corresponding line in a window matrix is
2611 After building the desired frame matrix, it will be passed to
2612 terminal code, which will manipulate both the desired and current
2613 frame matrix. Changes applied to the frame's current matrix have
2614 to be visible in current window matrices afterwards, of course.
2616 This problem is solved like this:
2618 1. Window and frame matrices share glyphs. Window matrices are
2619 constructed in a way that their glyph contents ARE the glyph
2620 contents needed in a frame matrix. Thus, any modification of
2621 glyphs done in terminal code will be reflected in window matrices
2624 2. Exchanges of rows in a frame matrix done by terminal code are
2625 intercepted by hook functions so that corresponding row operations
2626 on window matrices can be performed. This is necessary because we
2627 use pointers to glyphs in glyph row structures. To satisfy the
2628 assumption of point 1 above that glyphs are updated implicitly in
2629 window matrices when they are manipulated via the frame matrix,
2630 window and frame matrix must of course agree where to find the
2631 glyphs for their rows. Possible manipulations that must be
2632 mirrored are assignments of rows of the desired frame matrix to the
2633 current frame matrix and scrolling the current frame matrix. */
2635 /* Build frame F's desired matrix from window matrices. Only windows
2636 which have the flag must_be_updated_p set have to be updated. Menu
2637 bar lines of a frame are not covered by window matrices, so make
2638 sure not to touch them in this function. */
2641 build_frame_matrix (f
)
2646 /* F must have a frame matrix when this function is called. */
2647 xassert (!FRAME_WINDOW_P (f
));
2649 /* Clear all rows in the frame matrix covered by window matrices.
2650 Menu bar lines are not covered by windows. */
2651 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2652 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2654 /* Build the matrix by walking the window tree. */
2655 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2656 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2660 /* Walk a window tree, building a frame matrix MATRIX from window
2661 matrices. W is the root of a window tree. */
2664 build_frame_matrix_from_window_tree (matrix
, w
)
2665 struct glyph_matrix
*matrix
;
2670 if (!NILP (w
->hchild
))
2671 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2672 else if (!NILP (w
->vchild
))
2673 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2675 build_frame_matrix_from_leaf_window (matrix
, w
);
2677 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2682 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2683 desired frame matrix built. W is a leaf window whose desired or
2684 current matrix is to be added to FRAME_MATRIX. W's flag
2685 must_be_updated_p determines which matrix it contributes to
2686 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2687 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2688 Adding a desired matrix means setting up used counters and such in
2689 frame rows, while adding a current window matrix to FRAME_MATRIX
2690 means copying glyphs. The latter case corresponds to
2691 preserve_other_columns in the old redisplay. */
2694 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2695 struct glyph_matrix
*frame_matrix
;
2698 struct glyph_matrix
*window_matrix
;
2699 int window_y
, frame_y
;
2700 /* If non-zero, a glyph to insert at the right border of W. */
2701 GLYPH right_border_glyph
= 0;
2703 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2704 if (w
->must_be_updated_p
)
2706 window_matrix
= w
->desired_matrix
;
2708 /* Decide whether we want to add a vertical border glyph. */
2709 if (!WINDOW_RIGHTMOST_P (w
))
2711 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2714 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2715 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2718 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2720 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2724 window_matrix
= w
->current_matrix
;
2726 /* For all rows in the window matrix and corresponding rows in the
2729 frame_y
= window_matrix
->matrix_y
;
2730 while (window_y
< window_matrix
->nrows
)
2732 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2733 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2734 int current_row_p
= window_matrix
== w
->current_matrix
;
2736 /* Fill up the frame row with spaces up to the left margin of the
2738 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2740 /* Fill up areas in the window matrix row with spaces. */
2741 fill_up_glyph_row_with_spaces (window_row
);
2743 /* If only part of W's desired matrix has been built, and
2744 window_row wasn't displayed, use the corresponding current
2746 if (window_matrix
== w
->desired_matrix
2747 && !window_row
->enabled_p
)
2749 window_row
= w
->current_matrix
->rows
+ window_y
;
2755 /* Copy window row to frame row. */
2756 bcopy (window_row
->glyphs
[0],
2757 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2758 window_matrix
->matrix_w
* sizeof (struct glyph
));
2762 xassert (window_row
->enabled_p
);
2764 /* Only when a desired row has been displayed, we want
2765 the corresponding frame row to be updated. */
2766 frame_row
->enabled_p
= 1;
2768 /* Maybe insert a vertical border between horizontally adjacent
2770 if (right_border_glyph
)
2772 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2773 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2777 /* Window row window_y must be a slice of frame row
2779 xassert (glyph_row_slice_p (window_row
, frame_row
));
2781 /* If rows are in sync, we don't have to copy glyphs because
2782 frame and window share glyphs. */
2784 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2785 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2789 /* Set number of used glyphs in the frame matrix. Since we fill
2790 up with spaces, and visit leaf windows from left to right it
2791 can be done simply. */
2792 frame_row
->used
[TEXT_AREA
]
2793 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2801 /* Given a user-specified glyph, possibly including a Lisp-level face
2802 ID, return a glyph that has a realized face ID.
2803 This is used for glyphs displayed specially and not part of the text;
2804 for instance, vertical separators, truncation markers, etc. */
2807 spec_glyph_lookup_face (w
, glyph
)
2811 int lface_id
= FAST_GLYPH_FACE (glyph
);
2812 /* Convert the glyph's specified face to a realized (cache) face. */
2815 int face_id
= merge_faces (XFRAME (w
->frame
),
2816 Qt
, lface_id
, DEFAULT_FACE_ID
);
2818 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2823 /* Add spaces to a glyph row ROW in a window matrix.
2825 Each row has the form:
2827 +---------+-----------------------------+------------+
2828 | left | text | right |
2829 +---------+-----------------------------+------------+
2831 Left and right marginal areas are optional. This function adds
2832 spaces to areas so that there are no empty holes between areas.
2833 In other words: If the right area is not empty, the text area
2834 is filled up with spaces up to the right area. If the text area
2835 is not empty, the left area is filled up.
2837 To be called for frame-based redisplay, only. */
2840 fill_up_glyph_row_with_spaces (row
)
2841 struct glyph_row
*row
;
2843 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2844 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2845 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2849 /* Fill area AREA of glyph row ROW with spaces. To be called for
2850 frame-based redisplay only. */
2853 fill_up_glyph_row_area_with_spaces (row
, area
)
2854 struct glyph_row
*row
;
2857 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2859 struct glyph
*end
= row
->glyphs
[area
+ 1];
2860 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2863 *text
++ = space_glyph
;
2864 row
->used
[area
] = text
- row
->glyphs
[area
];
2869 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2870 reached. In frame matrices only one area, TEXT_AREA, is used. */
2873 fill_up_frame_row_with_spaces (row
, upto
)
2874 struct glyph_row
*row
;
2877 int i
= row
->used
[TEXT_AREA
];
2878 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2881 glyph
[i
++] = space_glyph
;
2883 row
->used
[TEXT_AREA
] = i
;
2888 /**********************************************************************
2889 Mirroring operations on frame matrices in window matrices
2890 **********************************************************************/
2892 /* Set frame being updated via frame-based redisplay to F. This
2893 function must be called before updates to make explicit that we are
2894 working on frame matrices or not. */
2897 set_frame_matrix_frame (f
)
2900 frame_matrix_frame
= f
;
2904 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2905 DESIRED_MATRIX is the desired matrix corresponding to
2906 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2907 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2908 frame_matrix_frame is non-null, this indicates that the exchange is
2909 done in frame matrices, and that we have to perform analogous
2910 operations in window matrices of frame_matrix_frame. */
2913 make_current (desired_matrix
, current_matrix
, row
)
2914 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2917 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2918 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2919 int mouse_face_p
= current_row
->mouse_face_p
;
2921 /* Do current_row = desired_row. This exchanges glyph pointers
2922 between both rows, and does a structure assignment otherwise. */
2923 assign_row (current_row
, desired_row
);
2925 /* Enable current_row to mark it as valid. */
2926 current_row
->enabled_p
= 1;
2927 current_row
->mouse_face_p
= mouse_face_p
;
2929 /* If we are called on frame matrices, perform analogous operations
2930 for window matrices. */
2931 if (frame_matrix_frame
)
2932 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2936 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2937 W's frame which has been made current (by swapping pointers between
2938 current and desired matrix). Perform analogous operations in the
2939 matrices of leaf windows in the window tree rooted at W. */
2942 mirror_make_current (w
, frame_row
)
2948 if (!NILP (w
->hchild
))
2949 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2950 else if (!NILP (w
->vchild
))
2951 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2954 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2955 here because the checks performed in debug mode there
2956 will not allow the conversion. */
2957 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2959 /* If FRAME_ROW is within W, assign the desired row to the
2960 current row (exchanging glyph pointers). */
2961 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2963 struct glyph_row
*current_row
2964 = MATRIX_ROW (w
->current_matrix
, row
);
2965 struct glyph_row
*desired_row
2966 = MATRIX_ROW (w
->desired_matrix
, row
);
2968 if (desired_row
->enabled_p
)
2969 assign_row (current_row
, desired_row
);
2971 swap_glyph_pointers (desired_row
, current_row
);
2972 current_row
->enabled_p
= 1;
2976 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2981 /* Perform row dance after scrolling. We are working on the range of
2982 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2983 including) in MATRIX. COPY_FROM is a vector containing, for each
2984 row I in the range 0 <= I < NLINES, the index of the original line
2985 to move to I. This index is relative to the row range, i.e. 0 <=
2986 index < NLINES. RETAINED_P is a vector containing zero for each
2987 row 0 <= I < NLINES which is empty.
2989 This function is called from do_scrolling and do_direct_scrolling. */
2992 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2994 struct glyph_matrix
*matrix
;
2995 int unchanged_at_top
, nlines
;
2999 /* A copy of original rows. */
3000 struct glyph_row
*old_rows
;
3002 /* Rows to assign to. */
3003 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3007 /* Make a copy of the original rows. */
3008 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3009 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3011 /* Assign new rows, maybe clear lines. */
3012 for (i
= 0; i
< nlines
; ++i
)
3014 int enabled_before_p
= new_rows
[i
].enabled_p
;
3016 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3017 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3018 new_rows
[i
] = old_rows
[copy_from
[i
]];
3019 new_rows
[i
].enabled_p
= enabled_before_p
;
3021 /* RETAINED_P is zero for empty lines. */
3022 if (!retained_p
[copy_from
[i
]])
3023 new_rows
[i
].enabled_p
= 0;
3026 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3027 if (frame_matrix_frame
)
3028 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3029 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3033 /* Synchronize glyph pointers in the current matrix of window W with
3034 the current frame matrix. */
3037 sync_window_with_frame_matrix_rows (w
)
3040 struct frame
*f
= XFRAME (w
->frame
);
3041 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3042 int left
, right
, x
, width
;
3044 /* Preconditions: W must be a leaf window on a tty frame. */
3045 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3046 xassert (!FRAME_WINDOW_P (f
));
3048 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3049 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3050 x
= w
->current_matrix
->matrix_x
;
3051 width
= w
->current_matrix
->matrix_w
;
3053 window_row
= w
->current_matrix
->rows
;
3054 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3055 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3057 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3059 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3060 = frame_row
->glyphs
[0] + x
;
3061 window_row
->glyphs
[TEXT_AREA
]
3062 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3063 window_row
->glyphs
[LAST_AREA
]
3064 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3065 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3066 = window_row
->glyphs
[LAST_AREA
] - right
;
3071 /* Return the window in the window tree rooted in W containing frame
3072 row ROW. Value is null if none is found. */
3075 frame_row_to_window (w
, row
)
3079 struct window
*found
= NULL
;
3083 if (!NILP (w
->hchild
))
3084 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3085 else if (!NILP (w
->vchild
))
3086 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3087 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3088 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3091 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3098 /* Perform a line dance in the window tree rooted at W, after
3099 scrolling a frame matrix in mirrored_line_dance.
3101 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3102 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3103 COPY_FROM is a vector containing, for each row I in the range 0 <=
3104 I < NLINES, the index of the original line to move to I. This
3105 index is relative to the row range, i.e. 0 <= index < NLINES.
3106 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3110 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3112 int unchanged_at_top
, nlines
;
3118 if (!NILP (w
->hchild
))
3119 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3120 nlines
, copy_from
, retained_p
);
3121 else if (!NILP (w
->vchild
))
3122 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3123 nlines
, copy_from
, retained_p
);
3126 /* W is a leaf window, and we are working on its current
3128 struct glyph_matrix
*m
= w
->current_matrix
;
3130 struct glyph_row
*old_rows
;
3132 /* Make a copy of the original rows of matrix m. */
3133 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3134 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3136 for (i
= 0; i
< nlines
; ++i
)
3138 /* Frame relative line assigned to. */
3139 int frame_to
= i
+ unchanged_at_top
;
3141 /* Frame relative line assigned. */
3142 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3144 /* Window relative line assigned to. */
3145 int window_to
= frame_to
- m
->matrix_y
;
3147 /* Window relative line assigned. */
3148 int window_from
= frame_from
- m
->matrix_y
;
3150 /* Is assigned line inside window? */
3151 int from_inside_window_p
3152 = window_from
>= 0 && window_from
< m
->matrix_h
;
3154 /* Is assigned to line inside window? */
3155 int to_inside_window_p
3156 = window_to
>= 0 && window_to
< m
->matrix_h
;
3158 if (from_inside_window_p
&& to_inside_window_p
)
3160 /* Enabled setting before assignment. */
3161 int enabled_before_p
;
3163 /* Do the assignment. The enabled_p flag is saved
3164 over the assignment because the old redisplay did
3166 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3167 m
->rows
[window_to
] = old_rows
[window_from
];
3168 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3170 /* If frame line is empty, window line is empty, too. */
3171 if (!retained_p
[copy_from
[i
]])
3172 m
->rows
[window_to
].enabled_p
= 0;
3174 else if (to_inside_window_p
)
3176 /* A copy between windows. This is an infrequent
3177 case not worth optimizing. */
3178 struct frame
*f
= XFRAME (w
->frame
);
3179 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3181 struct glyph_matrix
*m2
;
3184 w2
= frame_row_to_window (root
, frame_from
);
3185 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3186 -nw', FROM_FRAME sometimes has no associated window.
3187 This check avoids a segfault if W2 is null. */
3190 m2
= w2
->current_matrix
;
3191 m2_from
= frame_from
- m2
->matrix_y
;
3192 copy_row_except_pointers (m
->rows
+ window_to
,
3193 m2
->rows
+ m2_from
);
3195 /* If frame line is empty, window line is empty, too. */
3196 if (!retained_p
[copy_from
[i
]])
3197 m
->rows
[window_to
].enabled_p
= 0;
3201 else if (from_inside_window_p
)
3205 /* If there was a copy between windows, make sure glyph
3206 pointers are in sync with the frame matrix. */
3208 sync_window_with_frame_matrix_rows (w
);
3210 /* Check that no pointers are lost. */
3214 /* Next window on same level. */
3215 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3222 /* Check that window and frame matrices agree about their
3223 understanding where glyphs of the rows are to find. For each
3224 window in the window tree rooted at W, check that rows in the
3225 matrices of leaf window agree with their frame matrices about
3229 check_window_matrix_pointers (w
)
3234 if (!NILP (w
->hchild
))
3235 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3236 else if (!NILP (w
->vchild
))
3237 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3240 struct frame
*f
= XFRAME (w
->frame
);
3241 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3242 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3245 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3250 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3251 a window and FRAME_MATRIX is the corresponding frame matrix. For
3252 each row in WINDOW_MATRIX check that it's a slice of the
3253 corresponding frame row. If it isn't, abort. */
3256 check_matrix_pointers (window_matrix
, frame_matrix
)
3257 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3259 /* Row number in WINDOW_MATRIX. */
3262 /* Row number corresponding to I in FRAME_MATRIX. */
3263 int j
= window_matrix
->matrix_y
;
3265 /* For all rows check that the row in the window matrix is a
3266 slice of the row in the frame matrix. If it isn't we didn't
3267 mirror an operation on the frame matrix correctly. */
3268 while (i
< window_matrix
->nrows
)
3270 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3271 frame_matrix
->rows
+ j
))
3277 #endif /* GLYPH_DEBUG != 0 */
3281 /**********************************************************************
3282 VPOS and HPOS translations
3283 **********************************************************************/
3287 /* Translate vertical position VPOS which is relative to window W to a
3288 vertical position relative to W's frame. */
3291 window_to_frame_vpos (w
, vpos
)
3295 struct frame
*f
= XFRAME (w
->frame
);
3297 xassert (!FRAME_WINDOW_P (f
));
3298 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3299 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3300 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3305 /* Translate horizontal position HPOS which is relative to window W to
3306 a horizontal position relative to W's frame. */
3309 window_to_frame_hpos (w
, hpos
)
3313 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3314 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3318 #endif /* GLYPH_DEBUG */
3322 /**********************************************************************
3324 **********************************************************************/
3326 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3327 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3333 CHECK_LIVE_FRAME (frame
);
3336 /* Ignore redraw requests, if frame has no glyphs yet.
3337 (Implementation note: It still has to be checked why we are
3338 called so early here). */
3339 if (!glyphs_initialized_initially_p
)
3343 if (FRAME_MSDOS_P (f
))
3344 set_terminal_modes ();
3346 clear_current_matrices (f
);
3349 windows_or_buffers_changed
++;
3350 /* Mark all windows as inaccurate, so that every window will have
3351 its redisplay done. */
3352 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3353 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3359 /* Redraw frame F. This is nothing more than a call to the Lisp
3360 function redraw-frame. */
3367 XSETFRAME (frame
, f
);
3368 Fredraw_frame (frame
);
3372 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3373 doc
: /* Clear and redisplay all visible frames. */)
3376 Lisp_Object tail
, frame
;
3378 FOR_EACH_FRAME (tail
, frame
)
3379 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3380 Fredraw_frame (frame
);
3386 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3387 visible frames marked as garbaged. */
3390 redraw_garbaged_frames ()
3392 Lisp_Object tail
, frame
;
3394 FOR_EACH_FRAME (tail
, frame
)
3395 if (FRAME_VISIBLE_P (XFRAME (frame
))
3396 && FRAME_GARBAGED_P (XFRAME (frame
)))
3397 Fredraw_frame (frame
);
3402 /***********************************************************************
3404 ***********************************************************************/
3406 /* Try to update display and current glyph matrix directly.
3408 This function is called after a character G has been inserted into
3409 current_buffer. It tries to update the current glyph matrix and
3410 perform appropriate screen output to reflect the insertion. If it
3411 succeeds, the global flag redisplay_performed_directly_p will be
3412 set to 1, and thereby prevent the more costly general redisplay
3413 from running (see redisplay_internal).
3415 This function is not called for `hairy' character insertions.
3416 In particular, it is not called when after or before change
3417 functions exist, like they are used by font-lock. See keyboard.c
3418 for details where this function is called. */
3421 direct_output_for_insert (g
)
3424 register struct frame
*f
= SELECTED_FRAME ();
3425 struct window
*w
= XWINDOW (selected_window
);
3427 struct glyph_row
*glyph_row
;
3428 struct glyph
*glyphs
, *glyph
, *end
;
3430 /* Non-null means that redisplay of W is based on window matrices. */
3431 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3432 /* Non-null means we are in overwrite mode. */
3433 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3435 struct text_pos pos
;
3436 int delta
, delta_bytes
;
3438 /* Not done directly. */
3439 redisplay_performed_directly_p
= 0;
3441 /* Quickly give up for some common cases. */
3442 if (cursor_in_echo_area
3443 /* Give up if fonts have changed. */
3445 /* Give up if face attributes have been changed. */
3446 || face_change_count
3447 /* Give up if cursor position not really known. */
3448 || !display_completed
3449 /* Give up if buffer appears in two places. */
3450 || buffer_shared
> 1
3451 /* Give up if currently displaying a message instead of the
3452 minibuffer contents. */
3453 || (EQ (selected_window
, minibuf_window
)
3454 && EQ (minibuf_window
, echo_area_window
))
3455 /* Give up for hscrolled mini-buffer because display of the prompt
3456 is handled specially there (see display_line). */
3457 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3458 /* Give up if overwriting in the middle of a line. */
3461 && FETCH_BYTE (PT
) != '\n')
3462 /* Give up for tabs and line ends. */
3466 /* Give up if unable to display the cursor in the window. */
3467 || w
->cursor
.vpos
< 0
3468 /* Give up if we are showing a message or just cleared the message
3469 because we might need to resize the echo area window. */
3470 || !NILP (echo_area_buffer
[0])
3471 || !NILP (echo_area_buffer
[1])
3472 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3473 /* Can't do it in a continued line because continuation
3474 lines would change. */
3475 (glyph_row
->continued_p
3476 || glyph_row
->exact_window_width_line_p
3477 /* Can't use this method if the line overlaps others or is
3478 overlapped by others because these other lines would
3479 have to be redisplayed. */
3480 || glyph_row
->overlapping_p
3481 || glyph_row
->overlapped_p
))
3482 /* Can't do it for partial width windows on terminal frames
3483 because we can't clear to eol in such a window. */
3484 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3487 /* If we can't insert glyphs, we can use this method only
3488 at the end of a line. */
3489 if (!char_ins_del_ok
)
3490 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3493 /* Set up a display iterator structure for W. Glyphs will be
3494 produced in scratch_glyph_row. Current position is W's cursor
3496 clear_glyph_row (&scratch_glyph_row
);
3497 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3498 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3499 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3502 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3503 if (glyph_row
->mouse_face_p
)
3506 /* Give up if highlighting trailing whitespace and we have trailing
3507 whitespace in glyph_row. We would have to remove the trailing
3508 whitespace face in that case. */
3509 if (!NILP (Vshow_trailing_whitespace
)
3510 && glyph_row
->used
[TEXT_AREA
])
3514 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3515 if (last
->type
== STRETCH_GLYPH
3516 || (last
->type
== CHAR_GLYPH
3517 && last
->u
.ch
== ' '))
3521 /* Give up if there are overlay strings at pos. This would fail
3522 if the overlay string has newlines in it. */
3523 if (STRINGP (it
.string
))
3526 it
.hpos
= w
->cursor
.hpos
;
3527 it
.vpos
= w
->cursor
.vpos
;
3528 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3529 it
.current_y
= w
->cursor
.y
;
3530 it
.end_charpos
= PT
;
3531 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3532 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3534 /* More than one display element may be returned for PT - 1 if
3535 (i) it's a control character which is translated into `\003' or
3536 `^C', or (ii) it has a display table entry, or (iii) it's a
3537 combination of both. */
3538 delta
= delta_bytes
= 0;
3539 while (get_next_display_element (&it
))
3541 PRODUCE_GLYPHS (&it
);
3543 /* Give up if glyph doesn't fit completely on the line. */
3544 if (it
.current_x
>= it
.last_visible_x
)
3547 /* Give up if new glyph has different ascent or descent than
3548 the original row, or if it is not a character glyph. */
3549 if (glyph_row
->ascent
!= it
.ascent
3550 || glyph_row
->height
!= it
.ascent
+ it
.descent
3551 || glyph_row
->phys_ascent
!= it
.phys_ascent
3552 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3553 || it
.what
!= IT_CHARACTER
)
3557 delta_bytes
+= it
.len
;
3558 set_iterator_to_next (&it
, 1);
3561 /* Give up if we hit the right edge of the window. We would have
3562 to insert truncation or continuation glyphs. */
3563 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3564 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3567 /* Give up if there is a \t following in the line. */
3569 it2
.end_charpos
= ZV
;
3570 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3571 while (get_next_display_element (&it2
)
3572 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3576 set_iterator_to_next (&it2
, 1);
3579 /* Number of new glyphs produced. */
3580 n
= it
.glyph_row
->used
[TEXT_AREA
];
3582 /* Start and end of glyphs in original row. */
3583 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3584 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3586 /* Make room for new glyphs, then insert them. */
3587 xassert (end
- glyphs
- n
>= 0);
3588 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3589 (end
- glyphs
- n
) * sizeof (*end
));
3590 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3591 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3592 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3594 /* Compute new line width. */
3595 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3596 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3597 glyph_row
->pixel_width
= glyph_row
->x
;
3600 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3604 /* Increment buffer positions for glyphs following the newly
3606 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3607 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3608 glyph
->charpos
+= delta
;
3610 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3612 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3613 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3616 /* Adjust positions in lines following the one we are in. */
3617 increment_matrix_positions (w
->current_matrix
,
3619 w
->current_matrix
->nrows
,
3620 delta
, delta_bytes
);
3622 glyph_row
->contains_overlapping_glyphs_p
3623 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3625 glyph_row
->displays_text_p
= 1;
3626 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3627 XFASTINT (w
->window_end_vpos
)));
3629 if (!NILP (Vshow_trailing_whitespace
))
3630 highlight_trailing_whitespace (it
.f
, glyph_row
);
3632 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3633 In the middle, we have to insert glyphs. Note that this is now
3634 implemented for X frames. The implementation uses updated_window
3636 updated_row
= glyph_row
;
3637 updated_area
= TEXT_AREA
;
3641 rif
->update_window_begin_hook (w
);
3643 if (glyphs
== end
- n
3644 /* In front of a space added by append_space. */
3645 || (glyphs
== end
- n
- 1
3646 && (end
- n
)->charpos
<= 0))
3647 rif
->write_glyphs (glyphs
, n
);
3649 rif
->insert_glyphs (glyphs
, n
);
3653 if (glyphs
== end
- n
)
3654 write_glyphs (glyphs
, n
);
3656 insert_glyphs (glyphs
, n
);
3659 w
->cursor
.hpos
+= n
;
3660 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3661 xassert (w
->cursor
.hpos
>= 0
3662 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3664 /* How to set the cursor differs depending on whether we are
3665 using a frame matrix or a window matrix. Note that when
3666 a frame matrix is used, cursor_to expects frame coordinates,
3667 and the X and Y parameters are not used. */
3668 if (window_redisplay_p
)
3669 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3670 w
->cursor
.y
, w
->cursor
.x
);
3674 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3675 + (INTEGERP (w
->left_margin_cols
)
3676 ? XFASTINT (w
->left_margin_cols
)
3678 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3682 #ifdef HAVE_WINDOW_SYSTEM
3683 update_window_fringes (w
, 0);
3687 rif
->update_window_end_hook (w
, 1, 0);
3692 TRACE ((stderr
, "direct output for insert\n"));
3693 mark_window_display_accurate (it
.window
, 1);
3694 redisplay_performed_directly_p
= 1;
3699 /* Perform a direct display update for moving PT by N positions
3700 left or right. N < 0 means a movement backwards. This function
3701 is currently only called for N == 1 or N == -1. */
3704 direct_output_forward_char (n
)
3707 struct frame
*f
= SELECTED_FRAME ();
3708 struct window
*w
= XWINDOW (selected_window
);
3709 struct glyph_row
*row
;
3711 /* Give up if point moved out of or into a composition. */
3712 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3713 current_buffer
, PT
))
3716 /* Give up if face attributes have been changed. */
3717 if (face_change_count
)
3720 /* Give up if current matrix is not up to date or we are
3721 displaying a message. */
3722 if (!display_completed
|| cursor_in_echo_area
)
3725 /* Give up if the buffer's direction is reversed. */
3726 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3729 /* Can't use direct output if highlighting a region. */
3730 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3733 /* Can't use direct output if highlighting trailing whitespace. */
3734 if (!NILP (Vshow_trailing_whitespace
))
3737 /* Give up if we are showing a message or just cleared the message
3738 because we might need to resize the echo area window. */
3739 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3742 /* Give up if currently displaying a message instead of the
3743 minibuffer contents. */
3744 if (XWINDOW (minibuf_window
) == w
3745 && EQ (minibuf_window
, echo_area_window
))
3748 /* Give up if we don't know where the cursor is. */
3749 if (w
->cursor
.vpos
< 0)
3752 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3754 /* Give up if PT is outside of the last known cursor row. */
3755 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3756 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3759 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3761 w
->last_cursor
= w
->cursor
;
3762 XSETFASTINT (w
->last_point
, PT
);
3764 xassert (w
->cursor
.hpos
>= 0
3765 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3767 if (FRAME_WINDOW_P (f
))
3768 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3769 w
->cursor
.y
, w
->cursor
.x
);
3773 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3774 + (INTEGERP (w
->left_margin_cols
)
3775 ? XFASTINT (w
->left_margin_cols
)
3777 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3782 redisplay_performed_directly_p
= 1;
3788 /***********************************************************************
3790 ***********************************************************************/
3792 /* Update frame F based on the data in desired matrices.
3794 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3795 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3798 Value is non-zero if redisplay was stopped due to pending input. */
3801 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3804 int inhibit_hairy_id_p
;
3806 /* 1 means display has been paused because of pending input. */
3808 struct window
*root_window
= XWINDOW (f
->root_window
);
3810 if (FRAME_WINDOW_P (f
))
3812 /* We are working on window matrix basis. All windows whose
3813 flag must_be_updated_p is set have to be updated. */
3815 /* Record that we are not working on frame matrices. */
3816 set_frame_matrix_frame (NULL
);
3818 /* Update all windows in the window tree of F, maybe stopping
3819 when pending input is detected. */
3822 /* Update the menu bar on X frames that don't have toolkit
3824 if (WINDOWP (f
->menu_bar_window
))
3825 update_window (XWINDOW (f
->menu_bar_window
), 1);
3827 /* Update the tool-bar window, if present. */
3828 if (WINDOWP (f
->tool_bar_window
))
3830 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3832 /* Update tool-bar window. */
3833 if (w
->must_be_updated_p
)
3837 update_window (w
, 1);
3838 w
->must_be_updated_p
= 0;
3840 /* Swap tool-bar strings. We swap because we want to
3842 tem
= f
->current_tool_bar_string
;
3843 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3844 f
->desired_tool_bar_string
= tem
;
3849 /* Update windows. */
3850 paused_p
= update_window_tree (root_window
, force_p
);
3853 /* This flush is a performance bottleneck under X,
3854 and it doesn't seem to be necessary anyway (in general).
3855 It is necessary when resizing the window with the mouse, or
3856 at least the fringes are not redrawn in a timely manner. ++kfs */
3857 if (f
->force_flush_display_p
)
3859 rif
->flush_display (f
);
3860 f
->force_flush_display_p
= 0;
3865 /* We are working on frame matrix basis. Set the frame on whose
3866 frame matrix we operate. */
3867 set_frame_matrix_frame (f
);
3869 /* Build F's desired matrix from window matrices. */
3870 build_frame_matrix (f
);
3872 /* Update the display */
3874 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3878 fflush (termscript
);
3881 /* Check window matrices for lost pointers. */
3883 check_window_matrix_pointers (root_window
);
3884 add_frame_display_history (f
, paused_p
);
3888 /* Reset flags indicating that a window should be updated. */
3889 set_window_update_flags (root_window
, 0);
3891 display_completed
= !paused_p
;
3897 /************************************************************************
3898 Window-based updates
3899 ************************************************************************/
3901 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3902 don't stop updating when input is pending. */
3905 update_window_tree (w
, force_p
)
3911 while (w
&& !paused_p
)
3913 if (!NILP (w
->hchild
))
3914 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3915 else if (!NILP (w
->vchild
))
3916 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3917 else if (w
->must_be_updated_p
)
3918 paused_p
|= update_window (w
, force_p
);
3920 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3927 /* Update window W if its flag must_be_updated_p is non-zero. If
3928 FORCE_P is non-zero, don't stop updating if input is pending. */
3931 update_single_window (w
, force_p
)
3935 if (w
->must_be_updated_p
)
3937 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3939 /* Record that this is not a frame-based redisplay. */
3940 set_frame_matrix_frame (NULL
);
3944 update_window (w
, force_p
);
3947 /* Reset flag in W. */
3948 w
->must_be_updated_p
= 0;
3952 #ifdef HAVE_WINDOW_SYSTEM
3954 /* Redraw lines from the current matrix of window W that are
3955 overlapped by other rows. YB is bottom-most y-position in W. */
3958 redraw_overlapped_rows (w
, yb
)
3964 /* If rows overlapping others have been changed, the rows being
3965 overlapped have to be redrawn. This won't draw lines that have
3966 already been drawn in update_window_line because overlapped_p in
3967 desired rows is 0, so after row assignment overlapped_p in
3968 current rows is 0. */
3969 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3971 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3973 if (!row
->enabled_p
)
3975 else if (row
->mode_line_p
)
3978 if (row
->overlapped_p
)
3980 enum glyph_row_area area
;
3982 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3985 updated_area
= area
;
3986 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3987 if (row
->used
[area
])
3988 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3989 rif
->clear_end_of_line (-1);
3992 row
->overlapped_p
= 0;
3995 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4001 /* Redraw lines from the current matrix of window W that overlap
4002 others. YB is bottom-most y-position in W. */
4005 redraw_overlapping_rows (w
, yb
)
4010 struct glyph_row
*row
;
4012 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4014 row
= w
->current_matrix
->rows
+ i
;
4016 if (!row
->enabled_p
)
4018 else if (row
->mode_line_p
)
4021 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4023 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4027 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4028 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4029 overlaps
|= OVERLAPS_PRED
;
4030 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4031 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4032 overlaps
|= OVERLAPS_SUCC
;
4036 if (row
->used
[LEFT_MARGIN_AREA
])
4037 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4039 if (row
->used
[TEXT_AREA
])
4040 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4042 if (row
->used
[RIGHT_MARGIN_AREA
])
4043 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4045 /* Record in neighbour rows that ROW overwrites part of
4047 if (overlaps
& OVERLAPS_PRED
)
4048 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4049 if (overlaps
& OVERLAPS_SUCC
)
4050 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4059 #endif /* HAVE_WINDOW_SYSTEM */
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 /* Check that W's frame doesn't have glyph matrices. */
4102 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4103 xassert (updating_frame
!= NULL
);
4106 /* Check pending input the first time so that we can quickly return. */
4107 if (redisplay_dont_pause
)
4110 detect_input_pending_ignore_squeezables ();
4112 /* If forced to complete the update, or if no input is pending, do
4114 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4116 struct glyph_row
*row
, *end
;
4117 struct glyph_row
*mode_line_row
;
4118 struct glyph_row
*header_line_row
;
4119 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4121 rif
->update_window_begin_hook (w
);
4122 yb
= window_text_bottom_y (w
);
4124 /* If window has a header line, update it before everything else.
4125 Adjust y-positions of other rows by the header line height. */
4126 row
= desired_matrix
->rows
;
4127 end
= row
+ desired_matrix
->nrows
- 1;
4129 if (row
->mode_line_p
)
4131 header_line_row
= row
;
4135 header_line_row
= NULL
;
4137 /* Update the mode line, if necessary. */
4138 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4139 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4141 mode_line_row
->y
= yb
;
4142 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4144 &mouse_face_overwritten_p
);
4148 /* Find first enabled row. Optimizations in redisplay_internal
4149 may lead to an update with only one row enabled. There may
4150 be also completely empty matrices. */
4151 while (row
< end
&& !row
->enabled_p
)
4154 /* Try reusing part of the display by copying. */
4155 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4157 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4160 /* All rows were found to be equal. */
4166 /* We've scrolled the display. */
4172 /* Update the rest of the lines. */
4173 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4176 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4179 /* We'll have to play a little bit with when to
4180 detect_input_pending. If it's done too often,
4181 scrolling large windows with repeated scroll-up
4182 commands will too quickly pause redisplay. */
4183 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4184 detect_input_pending_ignore_squeezables ();
4186 changed_p
|= update_window_line (w
, vpos
,
4187 &mouse_face_overwritten_p
);
4189 /* Mark all rows below the last visible one in the current
4190 matrix as invalid. This is necessary because of
4191 variable line heights. Consider the case of three
4192 successive redisplays, where the first displays 5
4193 lines, the second 3 lines, and the third 5 lines again.
4194 If the second redisplay wouldn't mark rows in the
4195 current matrix invalid, the third redisplay might be
4196 tempted to optimize redisplay based on lines displayed
4197 in the first redisplay. */
4198 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4199 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4200 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4203 /* Was display preempted? */
4204 paused_p
= row
< end
;
4208 /* Update the header line after scrolling because a new header
4209 line would otherwise overwrite lines at the top of the window
4210 that can be scrolled. */
4211 if (header_line_row
&& header_line_row
->enabled_p
)
4213 header_line_row
->y
= 0;
4214 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4218 /* Fix the appearance of overlapping/overlapped rows. */
4219 if (!paused_p
&& !w
->pseudo_window_p
)
4221 #ifdef HAVE_WINDOW_SYSTEM
4222 if (changed_p
&& rif
->fix_overlapping_area
)
4224 redraw_overlapped_rows (w
, yb
);
4225 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 if (it
.vpos
< w
->current_matrix
->nrows
5802 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5805 if (it
.hpos
< row
->used
[TEXT_AREA
])
5807 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5808 #ifdef HAVE_WINDOW_SYSTEM
5811 *dy
-= row
->ascent
- glyph
->ascent
;
5812 *dx
+= glyph
->slice
.x
;
5813 *dy
+= glyph
->slice
.y
;
5814 /* Image slices positions are still relative to the entire image */
5815 *width
= img
->width
;
5816 *height
= img
->height
;
5821 *width
= glyph
->pixel_width
;
5822 *height
= glyph
->ascent
+ glyph
->descent
;
5828 *height
= row
->height
;
5833 *width
= *height
= 0;
5836 /* Add extra (default width) columns if clicked after EOL. */
5837 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5839 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5848 /* Value is the string under window-relative coordinates X/Y in the
5849 mode line or header line (PART says which) of window W, or nil if none.
5850 *CHARPOS is set to the position in the string returned. */
5853 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5855 enum window_part part
;
5858 Lisp_Object
*object
;
5860 int *width
, *height
;
5862 struct glyph_row
*row
;
5863 struct glyph
*glyph
, *end
;
5865 Lisp_Object string
= Qnil
;
5867 if (part
== ON_MODE_LINE
)
5868 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5870 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5872 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5874 if (row
->mode_line_p
&& row
->enabled_p
)
5876 /* Find the glyph under X. If we find one with a string object,
5877 it's the one we were looking for. */
5878 glyph
= row
->glyphs
[TEXT_AREA
];
5879 end
= glyph
+ row
->used
[TEXT_AREA
];
5880 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5881 x0
-= glyph
->pixel_width
;
5882 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5885 string
= glyph
->object
;
5886 *charpos
= glyph
->charpos
;
5887 *width
= glyph
->pixel_width
;
5888 *height
= glyph
->ascent
+ glyph
->descent
;
5889 #ifdef HAVE_WINDOW_SYSTEM
5890 if (glyph
->type
== IMAGE_GLYPH
)
5893 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5895 *object
= img
->spec
;
5896 y0
-= row
->ascent
- glyph
->ascent
;
5902 /* Add extra (default width) columns if clicked after EOL. */
5903 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5905 *height
= row
->height
;
5912 *width
= *height
= 0;
5922 /* Value is the string under window-relative coordinates X/Y in either
5923 marginal area, or nil if none. *CHARPOS is set to the position in
5924 the string returned. */
5927 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5929 enum window_part part
;
5932 Lisp_Object
*object
;
5934 int *width
, *height
;
5936 struct glyph_row
*row
= w
->current_matrix
->rows
;
5937 struct glyph
*glyph
, *end
;
5938 int x0
, y0
, i
, wy
= *y
;
5940 Lisp_Object string
= Qnil
;
5942 if (part
== ON_LEFT_MARGIN
)
5943 area
= LEFT_MARGIN_AREA
;
5944 else if (part
== ON_RIGHT_MARGIN
)
5945 area
= RIGHT_MARGIN_AREA
;
5949 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5950 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5953 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5957 /* Find the glyph under X. If we find one with a string object,
5958 it's the one we were looking for. */
5959 if (area
== RIGHT_MARGIN_AREA
)
5960 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5961 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5962 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5963 + window_box_width (w
, LEFT_MARGIN_AREA
)
5964 + window_box_width (w
, TEXT_AREA
));
5966 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5967 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5970 glyph
= row
->glyphs
[area
];
5971 end
= glyph
+ row
->used
[area
];
5972 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5973 x0
-= glyph
->pixel_width
;
5974 *x
= glyph
- row
->glyphs
[area
];
5977 string
= glyph
->object
;
5978 *charpos
= glyph
->charpos
;
5979 *width
= glyph
->pixel_width
;
5980 *height
= glyph
->ascent
+ glyph
->descent
;
5981 #ifdef HAVE_WINDOW_SYSTEM
5982 if (glyph
->type
== IMAGE_GLYPH
)
5985 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5987 *object
= img
->spec
;
5988 y0
-= row
->ascent
- glyph
->ascent
;
5989 x0
+= glyph
->slice
.x
;
5990 y0
+= glyph
->slice
.y
;
5996 /* Add extra (default width) columns if clicked after EOL. */
5997 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5999 *height
= row
->height
;
6006 *width
= *height
= 0;
6016 /***********************************************************************
6017 Changing Frame Sizes
6018 ***********************************************************************/
6023 window_change_signal (signalnum
) /* If we don't have an argument, */
6024 int signalnum
; /* some compilers complain in signal calls. */
6030 int old_errno
= errno
;
6032 signal (SIGWINCH
, window_change_signal
);
6033 SIGNAL_THREAD_CHECK (signalnum
);
6035 get_frame_size (&width
, &height
);
6037 /* The frame size change obviously applies to a termcap-controlled
6038 frame. Find such a frame in the list, and assume it's the only
6039 one (since the redisplay code always writes to stdout, not a
6040 FILE * specified in the frame structure). Record the new size,
6041 but don't reallocate the data structures now. Let that be done
6042 later outside of the signal handler. */
6045 Lisp_Object tail
, frame
;
6047 FOR_EACH_FRAME (tail
, frame
)
6049 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6051 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6059 #endif /* SIGWINCH */
6062 /* Do any change in frame size that was requested by a signal. SAFE
6063 non-zero means this function is called from a place where it is
6064 safe to change frame sizes while a redisplay is in progress. */
6067 do_pending_window_change (safe
)
6070 /* If window_change_signal should have run before, run it now. */
6071 if (redisplaying_p
&& !safe
)
6074 while (delayed_size_change
)
6076 Lisp_Object tail
, frame
;
6078 delayed_size_change
= 0;
6080 FOR_EACH_FRAME (tail
, frame
)
6082 struct frame
*f
= XFRAME (frame
);
6084 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6085 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6092 /* Change the frame height and/or width. Values may be given as zero to
6093 indicate no change is to take place.
6095 If DELAY is non-zero, then assume we're being called from a signal
6096 handler, and queue the change for later - perhaps the next
6097 redisplay. Since this tries to resize windows, we can't call it
6098 from a signal handler.
6100 SAFE non-zero means this function is called from a place where it's
6101 safe to change frame sizes while a redisplay is in progress. */
6104 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6105 register struct frame
*f
;
6106 int newheight
, newwidth
, pretend
, delay
, safe
;
6108 Lisp_Object tail
, frame
;
6110 if (! FRAME_WINDOW_P (f
))
6112 /* When using termcap, or on MS-DOS, all frames use
6113 the same screen, so a change in size affects all frames. */
6114 FOR_EACH_FRAME (tail
, frame
)
6115 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6116 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6117 pretend
, delay
, safe
);
6120 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6124 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6125 register struct frame
*f
;
6126 int newheight
, newwidth
, pretend
, delay
, safe
;
6128 int new_frame_total_cols
;
6129 int count
= SPECPDL_INDEX ();
6131 /* If we can't deal with the change now, queue it for later. */
6132 if (delay
|| (redisplaying_p
&& !safe
))
6134 f
->new_text_lines
= newheight
;
6135 f
->new_text_cols
= newwidth
;
6136 delayed_size_change
= 1;
6140 /* This size-change overrides any pending one for this frame. */
6141 f
->new_text_lines
= 0;
6142 f
->new_text_cols
= 0;
6144 /* If an argument is zero, set it to the current value. */
6146 newheight
= FRAME_LINES (f
);
6148 newwidth
= FRAME_COLS (f
);
6150 /* Compute width of windows in F.
6151 This is the width of the frame without vertical scroll bars. */
6152 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6154 /* Round up to the smallest acceptable size. */
6155 check_frame_size (f
, &newheight
, &newwidth
);
6157 /* If we're not changing the frame size, quit now. */
6158 if (newheight
== FRAME_LINES (f
)
6159 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6165 /* We only can set screen dimensions to certain values supported
6166 by our video hardware. Try to find the smallest size greater
6167 or equal to the requested dimensions. */
6168 dos_set_window_size (&newheight
, &newwidth
);
6171 if (newheight
!= FRAME_LINES (f
))
6173 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6175 /* Frame has both root and mini-buffer. */
6176 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6177 FRAME_TOP_MARGIN (f
));
6178 set_window_height (FRAME_ROOT_WINDOW (f
),
6181 - FRAME_TOP_MARGIN (f
)),
6183 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6185 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6188 /* Frame has just one top-level window. */
6189 set_window_height (FRAME_ROOT_WINDOW (f
),
6190 newheight
- FRAME_TOP_MARGIN (f
), 0);
6192 if (FRAME_TERMCAP_P (f
) && !pretend
)
6193 FrameRows
= newheight
;
6196 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6198 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6199 if (FRAME_HAS_MINIBUF_P (f
))
6200 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6202 if (FRAME_TERMCAP_P (f
) && !pretend
)
6203 FrameCols
= newwidth
;
6205 if (WINDOWP (f
->tool_bar_window
))
6206 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6209 FRAME_LINES (f
) = newheight
;
6210 SET_FRAME_COLS (f
, newwidth
);
6213 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6214 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6216 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6218 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6219 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6220 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6221 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6225 calculate_costs (f
);
6226 SET_FRAME_GARBAGED (f
);
6231 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6233 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6234 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6235 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6237 unbind_to (count
, Qnil
);
6242 /***********************************************************************
6243 Terminal Related Lisp Functions
6244 ***********************************************************************/
6246 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6247 1, 1, "FOpen termscript file: ",
6248 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6249 FILE = nil means just close any termscript file currently open. */)
6253 if (termscript
!= 0) fclose (termscript
);
6258 file
= Fexpand_file_name (file
, Qnil
);
6259 termscript
= fopen (SDATA (file
), "w");
6260 if (termscript
== 0)
6261 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6267 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6268 Ssend_string_to_terminal
, 1, 1, 0,
6269 doc
: /* Send STRING to the terminal without alteration.
6270 Control characters in STRING will have terminal-dependent effects. */)
6274 /* ??? Perhaps we should do something special for multibyte strings here. */
6275 CHECK_STRING (string
);
6276 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6280 fwrite (SDATA (string
), 1, SBYTES (string
),
6282 fflush (termscript
);
6288 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6289 doc
: /* Beep, or flash the screen.
6290 Also, unless an argument is given,
6291 terminate any keyboard macro currently executing. */)
6314 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6315 error ("Keyboard macro terminated by a command ringing the bell");
6323 /***********************************************************************
6325 ***********************************************************************/
6327 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6328 doc
: /* Pause, without updating display, for SECONDS seconds.
6329 SECONDS may be a floating-point value, meaning that you can wait for a
6330 fraction of a second. Optional second arg MILLISECONDS specifies an
6331 additional wait period, in milliseconds; this may be useful if your
6332 Emacs was built without floating point support.
6333 \(Not all operating systems support waiting for a fraction of a second.) */)
6334 (seconds
, milliseconds
)
6335 Lisp_Object seconds
, milliseconds
;
6339 if (NILP (milliseconds
))
6340 XSETINT (milliseconds
, 0);
6342 CHECK_NUMBER (milliseconds
);
6343 usec
= XINT (milliseconds
) * 1000;
6346 double duration
= extract_float (seconds
);
6347 sec
= (int) duration
;
6348 usec
+= (duration
- sec
) * 1000000;
6351 #ifndef EMACS_HAS_USECS
6352 if (sec
== 0 && usec
!= 0)
6353 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6356 /* Assure that 0 <= usec < 1000000. */
6359 /* We can't rely on the rounding being correct if usec is negative. */
6360 if (-1000000 < usec
)
6361 sec
--, usec
+= 1000000;
6363 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6366 sec
+= usec
/ 1000000, usec
%= 1000000;
6368 if (sec
< 0 || (sec
== 0 && usec
== 0))
6371 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6377 /* This is just like wait_reading_process_output, except that
6378 it does the redisplay.
6380 It's also much like Fsit_for, except that it can be used for
6381 waiting for input as well. */
6384 sit_for (sec
, usec
, reading
, display
, initial_display
)
6385 int sec
, usec
, reading
, display
, initial_display
;
6387 swallow_events (display
);
6389 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_kbd_macro
))
6392 if (initial_display
)
6393 redisplay_preserve_echo_area (2);
6395 if (sec
== 0 && usec
== 0)
6402 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6405 return detect_input_pending () ? Qnil
: Qt
;
6409 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6410 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6411 SECONDS may be a floating-point value, meaning that you can wait for a
6412 fraction of a second.
6413 \(Not all operating systems support waiting for a fraction of a second.)
6414 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6415 Redisplay is preempted as always if input arrives, and does not happen
6416 if input is available before it starts.
6417 Value is t if waited the full time with no input arriving.
6419 An obsolete but still supported form is
6420 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6421 Where the optional arg MILLISECONDS specifies an additional wait period,
6422 in milliseconds; this was useful when Emacs was built without
6423 floating point support.
6424 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6426 /* The `old-nodisp' stuff is there so that the arglist has the correct
6427 length. Otherwise, `defdvice' will redefine it with fewer args. */
6428 (seconds
, milliseconds
, nodisp
)
6429 Lisp_Object seconds
, milliseconds
, nodisp
;
6433 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6435 nodisp
= milliseconds
;
6436 milliseconds
= Qnil
;
6439 if (NILP (milliseconds
))
6440 XSETINT (milliseconds
, 0);
6442 CHECK_NUMBER (milliseconds
);
6443 usec
= XINT (milliseconds
) * 1000;
6446 double duration
= extract_float (seconds
);
6447 sec
= (int) duration
;
6448 usec
+= (duration
- sec
) * 1000000;
6451 #ifndef EMACS_HAS_USECS
6452 if (usec
!= 0 && sec
== 0)
6453 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6456 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6461 /***********************************************************************
6462 Other Lisp Functions
6463 ***********************************************************************/
6465 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6466 session's frames, frame names, buffers, buffer-read-only flags, and
6467 buffer-modified-flags. */
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, 1, 0,
6474 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6475 VARIABLE is a variable name whose value is either nil or a state vector
6476 that will be updated to contain all frames and buffers,
6477 aside from buffers whose names start with space,
6478 along with the buffers' read-only and modified flags. This allows a fast
6479 check to see whether buffer menus might need to be recomputed.
6480 If this function returns non-nil, it updates the internal vector to reflect
6483 If VARIABLE is nil, an internal variable is used. Users should not
6484 pass nil for VARIABLE. */)
6486 Lisp_Object variable
;
6488 Lisp_Object state
, tail
, frame
, buf
;
6489 Lisp_Object
*vecp
, *end
;
6492 if (! NILP (variable
))
6494 CHECK_SYMBOL (variable
);
6495 state
= Fsymbol_value (variable
);
6496 if (! VECTORP (state
))
6500 state
= frame_and_buffer_state
;
6502 vecp
= XVECTOR (state
)->contents
;
6503 end
= vecp
+ XVECTOR (state
)->size
;
6505 FOR_EACH_FRAME (tail
, frame
)
6509 if (!EQ (*vecp
++, frame
))
6513 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6516 /* Check that the buffer info matches. */
6517 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6519 buf
= XCDR (XCAR (tail
));
6520 /* Ignore buffers that aren't included in buffer lists. */
6521 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6525 if (!EQ (*vecp
++, buf
))
6529 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6533 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6538 /* Detect deletion of a buffer at the end of the list. */
6539 if (EQ (*vecp
, Qlambda
))
6542 /* Come here if we decide the data has changed. */
6544 /* Count the size we will need.
6545 Start with 1 so there is room for at least one lambda at the end. */
6547 FOR_EACH_FRAME (tail
, frame
)
6549 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6551 /* Reallocate the vector if data has grown to need it,
6552 or if it has shrunk a lot. */
6553 if (! VECTORP (state
)
6554 || n
> XVECTOR (state
)->size
6555 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6556 /* Add 20 extra so we grow it less often. */
6558 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6559 if (! NILP (variable
))
6560 Fset (variable
, state
);
6562 frame_and_buffer_state
= state
;
6565 /* Record the new data in the (possibly reallocated) vector. */
6566 vecp
= XVECTOR (state
)->contents
;
6567 FOR_EACH_FRAME (tail
, frame
)
6570 *vecp
++ = XFRAME (frame
)->name
;
6572 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6574 buf
= XCDR (XCAR (tail
));
6575 /* Ignore buffers that aren't included in buffer lists. */
6576 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6579 *vecp
++ = XBUFFER (buf
)->read_only
;
6580 *vecp
++ = Fbuffer_modified_p (buf
);
6582 /* Fill up the vector with lambdas (always at least one). */
6584 while (vecp
- XVECTOR (state
)->contents
6585 < XVECTOR (state
)->size
)
6587 /* Make sure we didn't overflow the vector. */
6588 if (vecp
- XVECTOR (state
)->contents
6589 > XVECTOR (state
)->size
)
6596 /***********************************************************************
6598 ***********************************************************************/
6600 char *terminal_type
;
6602 /* Initialization done when Emacs fork is started, before doing stty.
6603 Determine terminal type and set terminal_driver. Then invoke its
6604 decoding routine to set up variables in the terminal package. */
6609 #ifdef HAVE_X_WINDOWS
6610 extern int display_arg
;
6613 /* Construct the space glyph. */
6614 space_glyph
.type
= CHAR_GLYPH
;
6615 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6616 space_glyph
.charpos
= -1;
6620 cursor_in_echo_area
= 0;
6621 terminal_type
= (char *) 0;
6623 /* Now is the time to initialize this; it's used by init_sys_modes
6625 Vwindow_system
= Qnil
;
6627 /* If the user wants to use a window system, we shouldn't bother
6628 initializing the terminal. This is especially important when the
6629 terminal is so dumb that emacs gives up before and doesn't bother
6630 using the window system.
6632 If the DISPLAY environment variable is set and nonempty,
6633 try to use X, and die with an error message if that doesn't work. */
6635 #ifdef HAVE_X_WINDOWS
6640 display
= getenv ("DECW$DISPLAY");
6642 display
= getenv ("DISPLAY");
6645 display_arg
= (display
!= 0 && *display
!= 0);
6648 if (!inhibit_window_system
&& display_arg
6654 Vwindow_system
= intern ("x");
6656 Vwindow_system_version
= make_number (11);
6658 Vwindow_system_version
= make_number (10);
6660 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6661 /* In some versions of ncurses,
6662 tputs crashes if we have not called tgetent.
6664 { char b
[2044]; tgetent (b
, "xterm");}
6666 adjust_frame_glyphs_initially ();
6669 #endif /* HAVE_X_WINDOWS */
6672 if (!inhibit_window_system
)
6674 Vwindow_system
= intern ("w32");
6675 Vwindow_system_version
= make_number (1);
6676 adjust_frame_glyphs_initially ();
6679 #endif /* HAVE_NTGUI */
6682 if (!inhibit_window_system
)
6684 Vwindow_system
= intern ("mac");
6685 Vwindow_system_version
= make_number (1);
6686 adjust_frame_glyphs_initially ();
6691 /* If no window system has been specified, try to use the terminal. */
6694 fatal ("standard input is not a tty");
6698 /* Look at the TERM variable. */
6699 terminal_type
= (char *) getenv ("TERM");
6703 fprintf (stderr
, "Please specify your terminal type.\n\
6704 For types defined in VMS, use set term /device=TYPE.\n\
6705 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6706 \(The quotation marks are necessary since terminal types are lower case.)\n");
6708 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6714 /* VMS DCL tends to up-case things, so down-case term type.
6715 Hardly any uppercase letters in terminal types; should be none. */
6717 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6720 strcpy (new, terminal_type
);
6722 for (p
= new; *p
; p
++)
6726 terminal_type
= new;
6730 term_init (terminal_type
);
6733 struct frame
*sf
= SELECTED_FRAME ();
6734 int width
= FRAME_TOTAL_COLS (sf
);
6735 int height
= FRAME_LINES (sf
);
6737 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6739 /* If these sizes are so big they cause overflow, just ignore the
6740 change. It's not clear what better we could do. */
6741 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6742 fatal ("screen size %dx%d too big", width
, height
);
6745 adjust_frame_glyphs_initially ();
6746 calculate_costs (XFRAME (selected_frame
));
6751 #endif /* CANNOT_DUMP */
6752 signal (SIGWINCH
, window_change_signal
);
6753 #endif /* SIGWINCH */
6755 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6759 /* The MSDOS terminal turns on its ``window system'' relatively
6760 late into the startup, so we cannot do the frame faces'
6761 initialization just yet. It will be done later by pc-win.el
6762 and internal_terminal_init. */
6763 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6765 && NILP (Vwindow_system
))
6767 /* For the initial frame, we don't have any way of knowing what
6768 are the foreground and background colors of the terminal. */
6769 struct frame
*sf
= SELECTED_FRAME();
6771 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6772 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6773 call0 (intern ("tty-set-up-initial-frame-faces"));
6779 /***********************************************************************
6781 ***********************************************************************/
6783 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6784 Sinternal_show_cursor
, 2, 2, 0,
6785 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6786 WINDOW nil means use the selected window. SHOW non-nil means
6787 show a cursor in WINDOW in the next redisplay. SHOW nil means
6788 don't show a cursor. */)
6790 Lisp_Object window
, show
;
6792 /* Don't change cursor state while redisplaying. This could confuse
6794 if (!redisplaying_p
)
6797 window
= selected_window
;
6799 CHECK_WINDOW (window
);
6801 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6808 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6809 Sinternal_show_cursor_p
, 0, 1, 0,
6810 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6811 WINDOW nil or omitted means report on the selected window. */)
6818 window
= selected_window
;
6820 CHECK_WINDOW (window
);
6822 w
= XWINDOW (window
);
6823 return w
->cursor_off_p
? Qnil
: Qt
;
6827 /***********************************************************************
6829 ***********************************************************************/
6834 defsubr (&Sredraw_frame
);
6835 defsubr (&Sredraw_display
);
6836 defsubr (&Sframe_or_buffer_changed_p
);
6837 defsubr (&Sopen_termscript
);
6839 defsubr (&Ssit_for
);
6840 defsubr (&Ssleep_for
);
6841 defsubr (&Ssend_string_to_terminal
);
6842 defsubr (&Sinternal_show_cursor
);
6843 defsubr (&Sinternal_show_cursor_p
);
6846 defsubr (&Sdump_redisplay_history
);
6849 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6850 staticpro (&frame_and_buffer_state
);
6852 Qdisplay_table
= intern ("display-table");
6853 staticpro (&Qdisplay_table
);
6854 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6855 staticpro (&Qredisplay_dont_pause
);
6857 DEFVAR_INT ("baud-rate", &baud_rate
,
6858 doc
: /* *The output baud rate of the terminal.
6859 On most systems, changing this value will affect the amount of padding
6860 and the other strategic decisions made during redisplay. */);
6862 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6863 doc
: /* *Non-nil means invert the entire frame display.
6864 This means everything is in inverse video which otherwise would not be. */);
6866 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6867 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6869 See also `ring-bell-function'. */);
6871 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6872 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6873 A non-nil value is useful if the terminal can automatically preserve
6874 Emacs's frame display when you reenter Emacs.
6875 It is up to you to set this variable if your terminal can do that. */);
6877 DEFVAR_LISP ("window-system", &Vwindow_system
,
6878 doc
: /* Name of window system that Emacs is displaying through.
6879 The value is a symbol--for instance, `x' for X windows.
6880 The value is nil if Emacs is using a text-only terminal. */);
6882 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6883 doc
: /* The version number of the window system in use.
6884 For X windows, this is 10 or 11. */);
6886 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6887 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6889 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6890 doc
: /* Table defining how to output a glyph code to the frame.
6891 If not nil, this is a vector indexed by glyph code to define the glyph.
6892 Each element can be:
6893 integer: a glyph code which this glyph is an alias for.
6894 string: output this glyph using that string (not impl. in X windows).
6895 nil: this glyph mod 524288 is the code of a character to output,
6896 and this glyph / 524288 is the face number (see `face-id') to use
6897 while outputting it. */);
6898 Vglyph_table
= Qnil
;
6900 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6901 doc
: /* Display table to use for buffers that specify none.
6902 See `buffer-display-table' for more information. */);
6903 Vstandard_display_table
= Qnil
;
6905 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6906 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6907 redisplay_dont_pause
= 0;
6909 /* Initialize `window-system', unless init_display already decided it. */
6914 Vwindow_system
= Qnil
;
6915 Vwindow_system_version
= Qnil
;
6919 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6920 (do not change this comment) */