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"
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 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
196 are supported, so we can check for input during redisplay at
197 regular intervals. */
198 #ifdef EMACS_HAS_USECS
199 #define PERIODIC_PREEMPTION_CHECKING 1
201 #define PERIODIC_PREEMPTION_CHECKING 0
204 #if PERIODIC_PREEMPTION_CHECKING
206 /* If a number (float), check for user input every N seconds. */
208 Lisp_Object Vredisplay_preemption_period
;
210 /* Redisplay preemption timers. */
212 static EMACS_TIME preemption_period
;
213 static EMACS_TIME preemption_next_check
;
217 /* Nonzero upon entry to redisplay means do not assume anything about
218 current contents of actual terminal frame; clear and redraw it. */
222 /* Nonzero means last display completed. Zero means it was preempted. */
224 int display_completed
;
226 /* Lisp variable visible-bell; enables use of screen-flash instead of
231 /* Invert the color of the whole frame, at a low level. */
235 /* Line speed of the terminal. */
239 /* Either nil or a symbol naming the window system under which Emacs
242 Lisp_Object Vwindow_system
;
244 /* Version number of X windows: 10, 11 or nil. */
246 Lisp_Object Vwindow_system_version
;
248 /* Vector of glyph definitions. Indexed by glyph number, the contents
249 are a string which is how to output the glyph.
251 If Vglyph_table is nil, a glyph is output by using its low 8 bits
254 This is an obsolete feature that is no longer used. The variable
255 is retained for compatibility. */
257 Lisp_Object Vglyph_table
;
259 /* Display table to use for vectors that don't specify their own. */
261 Lisp_Object Vstandard_display_table
;
263 /* Nonzero means reading single-character input with prompt so put
264 cursor on mini-buffer after the prompt. Positive means at end of
265 text in echo area; negative means at beginning of line. */
267 int cursor_in_echo_area
;
269 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
272 /* The currently selected frame. In a single-frame version, this
273 variable always equals the_only_frame. */
275 Lisp_Object selected_frame
;
277 /* A frame which is not just a mini-buffer, or 0 if there are no such
278 frames. This is usually the most recent such frame that was
279 selected. In a single-frame version, this variable always holds
280 the address of the_only_frame. */
282 struct frame
*last_nonminibuf_frame
;
284 /* Stdio stream being used for copy of all output. */
288 /* Structure for info on cursor positioning. */
292 /* 1 means SIGWINCH happened when not safe. */
294 int delayed_size_change
;
296 /* 1 means glyph initialization has been completed at startup. */
298 static int glyphs_initialized_initially_p
;
300 /* Updated window if != 0. Set by update_window. */
302 struct window
*updated_window
;
304 /* Glyph row updated in update_window_line, and area that is updated. */
306 struct glyph_row
*updated_row
;
309 /* A glyph for a space. */
311 struct glyph space_glyph
;
313 /* Non-zero means update has been performed directly, so that there's
314 no need for redisplay_internal to do much work. Set by
315 direct_output_for_insert. */
317 int redisplay_performed_directly_p
;
319 /* Counts of allocated structures. These counts serve to diagnose
320 memory leaks and double frees. */
322 int glyph_matrix_count
;
323 int glyph_pool_count
;
325 /* If non-null, the frame whose frame matrices are manipulated. If
326 null, window matrices are worked on. */
328 static struct frame
*frame_matrix_frame
;
330 /* Current interface for window-based redisplay. Set from init_xterm.
331 A null value means we are not using window-based redisplay. */
333 struct redisplay_interface
*rif
;
335 /* Non-zero means that fonts have been loaded since the last glyph
336 matrix adjustments. Redisplay must stop, and glyph matrices must
337 be adjusted when this flag becomes non-zero during display. The
338 reason fonts can be loaded so late is that fonts of fontsets are
343 /* Convert vpos and hpos from frame to window and vice versa.
344 This may only be used for terminal frames. */
348 static int window_to_frame_vpos
P_ ((struct window
*, int));
349 static int window_to_frame_hpos
P_ ((struct window
*, int));
350 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
351 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
353 /* One element of the ring buffer containing redisplay history
356 struct redisplay_history
358 char trace
[512 + 100];
361 /* The size of the history buffer. */
363 #define REDISPLAY_HISTORY_SIZE 30
365 /* The redisplay history buffer. */
367 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
369 /* Next free entry in redisplay_history. */
371 static int history_idx
;
373 /* A tick that's incremented each time something is added to the
376 static unsigned history_tick
;
378 static void add_frame_display_history
P_ ((struct frame
*, int));
379 static void add_window_display_history
P_ ((struct window
*, char *, int));
381 /* Add to the redisplay history how window W has been displayed.
382 MSG is a trace containing the information how W's glyph matrix
383 has been constructed. PAUSED_P non-zero means that the update
384 has been interrupted for pending input. */
387 add_window_display_history (w
, msg
, paused_p
)
394 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
396 buf
= redisplay_history
[history_idx
].trace
;
399 sprintf (buf
, "%d: window %p (`%s')%s\n",
402 ((BUFFERP (w
->buffer
)
403 && STRINGP (XBUFFER (w
->buffer
)->name
))
404 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
406 paused_p
? " ***paused***" : "");
411 /* Add to the redisplay history that frame F has been displayed.
412 PAUSED_P non-zero means that the update has been interrupted for
416 add_frame_display_history (f
, paused_p
)
422 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
424 buf
= redisplay_history
[history_idx
].trace
;
427 sprintf (buf
, "%d: update frame %p%s",
429 f
, paused_p
? " ***paused***" : "");
433 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
434 Sdump_redisplay_history
, 0, 0, "",
435 doc
: /* Dump redisplay history to stderr. */)
440 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
443 i
= REDISPLAY_HISTORY_SIZE
- 1;
444 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
451 #else /* GLYPH_DEBUG == 0 */
453 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
454 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
456 #endif /* GLYPH_DEBUG == 0 */
459 /* Like bcopy except never gets confused by overlap. Let this be the
460 first function defined in this file, or change emacs.c where the
461 address of this function is used. */
464 safe_bcopy (from
, to
, size
)
469 if (size
<= 0 || from
== to
)
472 /* If the source and destination don't overlap, then bcopy can
473 handle it. If they do overlap, but the destination is lower in
474 memory than the source, we'll assume bcopy can handle that. */
475 if (to
< from
|| from
+ size
<= to
)
476 bcopy (from
, to
, size
);
478 /* Otherwise, we'll copy from the end. */
481 register const char *endf
= from
+ size
;
482 register char *endt
= to
+ size
;
484 /* If TO - FROM is large, then we should break the copy into
485 nonoverlapping chunks of TO - FROM bytes each. However, if
486 TO - FROM is small, then the bcopy function call overhead
487 makes this not worth it. The crossover point could be about
488 anywhere. Since I don't think the obvious copy loop is too
489 bad, I'm trying to err in its favor. */
494 while (endf
!= from
);
506 bcopy (endf
, endt
, to
- from
);
509 /* If SIZE wasn't a multiple of TO - FROM, there will be a
510 little left over. The amount left over is (endt + (to -
511 from)) - to, which is endt - from. */
512 bcopy (from
, to
, endt
- from
);
519 /***********************************************************************
521 ***********************************************************************/
523 /* Allocate and return a glyph_matrix structure. POOL is the glyph
524 pool from which memory for the matrix should be allocated, or null
525 for window-based redisplay where no glyph pools are used. The
526 member `pool' of the glyph matrix structure returned is set to
527 POOL, the structure is otherwise zeroed. */
529 struct glyph_matrix
*
530 new_glyph_matrix (pool
)
531 struct glyph_pool
*pool
;
533 struct glyph_matrix
*result
;
535 /* Allocate and clear. */
536 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
537 bzero (result
, sizeof *result
);
539 /* Increment number of allocated matrices. This count is used
540 to detect memory leaks. */
541 ++glyph_matrix_count
;
543 /* Set pool and return. */
549 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
551 The global counter glyph_matrix_count is decremented when a matrix
552 is freed. If the count gets negative, more structures were freed
553 than allocated, i.e. one matrix was freed more than once or a bogus
554 pointer was passed to this function.
556 If MATRIX->pool is null, this means that the matrix manages its own
557 glyph memory---this is done for matrices on X frames. Freeing the
558 matrix also frees the glyph memory in this case. */
561 free_glyph_matrix (matrix
)
562 struct glyph_matrix
*matrix
;
568 /* Detect the case that more matrices are freed than were
570 if (--glyph_matrix_count
< 0)
573 /* Free glyph memory if MATRIX owns it. */
574 if (matrix
->pool
== NULL
)
575 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
576 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
578 /* Free row structures and the matrix itself. */
579 xfree (matrix
->rows
);
585 /* Return the number of glyphs to reserve for a marginal area of
586 window W. TOTAL_GLYPHS is the number of glyphs in a complete
587 display line of window W. MARGIN gives the width of the marginal
588 area in canonical character units. MARGIN should be an integer
592 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
599 if (NUMBERP (margin
))
601 int width
= XFASTINT (w
->total_cols
);
602 double d
= max (0, XFLOATINT (margin
));
603 d
= min (width
/ 2 - 1, d
);
604 n
= (int) ((double) total_glyphs
/ width
* d
);
613 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
616 W is null if the function is called for a frame glyph matrix.
617 Otherwise it is the window MATRIX is a member of. X and Y are the
618 indices of the first column and row of MATRIX within the frame
619 matrix, if such a matrix exists. They are zero for purely
620 window-based redisplay. DIM is the needed size of the matrix.
622 In window-based redisplay, where no frame matrices exist, glyph
623 matrices manage their own glyph storage. Otherwise, they allocate
624 storage from a common frame glyph pool which can be found in
627 The reason for this memory management strategy is to avoid complete
628 frame redraws if possible. When we allocate from a common pool, a
629 change of the location or size of a sub-matrix within the pool
630 requires a complete redisplay of the frame because we cannot easily
631 make sure that the current matrices of all windows still agree with
632 what is displayed on the screen. While this is usually fast, it
633 leads to screen flickering. */
636 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
638 struct glyph_matrix
*matrix
;
644 int marginal_areas_changed_p
= 0;
645 int header_line_changed_p
= 0;
646 int header_line_p
= 0;
647 int left
= -1, right
= -1;
648 int window_width
= -1, window_height
;
650 /* See if W had a header line that has disappeared now, or vice versa.
654 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
656 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
657 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
659 matrix
->header_line_p
= header_line_p
;
661 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
662 Do nothing if MATRIX' size, position, vscroll, and marginal areas
663 haven't changed. This optimization is important because preserving
664 the matrix means preventing redisplay. */
665 if (matrix
->pool
== NULL
)
667 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
668 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
669 xassert (left
>= 0 && right
>= 0);
670 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
671 || right
!= matrix
->right_margin_glyphs
);
673 if (!marginal_areas_changed_p
675 && !header_line_changed_p
676 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
677 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
678 && matrix
->window_height
== window_height
679 && matrix
->window_vscroll
== w
->vscroll
680 && matrix
->window_width
== window_width
)
684 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
685 if (matrix
->rows_allocated
< dim
.height
)
687 int size
= dim
.height
* sizeof (struct glyph_row
);
688 new_rows
= dim
.height
- matrix
->rows_allocated
;
689 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
690 bzero (matrix
->rows
+ matrix
->rows_allocated
,
691 new_rows
* sizeof *matrix
->rows
);
692 matrix
->rows_allocated
= dim
.height
;
697 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
698 on a frame not using window-based redisplay. Set up pointers for
699 each row into the glyph pool. */
702 xassert (matrix
->pool
->glyphs
);
706 left
= margin_glyphs_to_reserve (w
, dim
.width
,
707 w
->left_margin_cols
);
708 right
= margin_glyphs_to_reserve (w
, dim
.width
,
709 w
->right_margin_cols
);
714 for (i
= 0; i
< dim
.height
; ++i
)
716 struct glyph_row
*row
= &matrix
->rows
[i
];
718 row
->glyphs
[LEFT_MARGIN_AREA
]
719 = (matrix
->pool
->glyphs
720 + (y
+ i
) * matrix
->pool
->ncolumns
724 || row
== matrix
->rows
+ dim
.height
- 1
725 || (row
== matrix
->rows
&& matrix
->header_line_p
))
727 row
->glyphs
[TEXT_AREA
]
728 = row
->glyphs
[LEFT_MARGIN_AREA
];
729 row
->glyphs
[RIGHT_MARGIN_AREA
]
730 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
731 row
->glyphs
[LAST_AREA
]
732 = row
->glyphs
[RIGHT_MARGIN_AREA
];
736 row
->glyphs
[TEXT_AREA
]
737 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
738 row
->glyphs
[RIGHT_MARGIN_AREA
]
739 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
740 row
->glyphs
[LAST_AREA
]
741 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
745 matrix
->left_margin_glyphs
= left
;
746 matrix
->right_margin_glyphs
= right
;
750 /* If MATRIX->pool is null, MATRIX is responsible for managing
751 its own memory. It is a window matrix for window-based redisplay.
752 Allocate glyph memory from the heap. */
753 if (dim
.width
> matrix
->matrix_w
755 || header_line_changed_p
756 || marginal_areas_changed_p
)
758 struct glyph_row
*row
= matrix
->rows
;
759 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
763 row
->glyphs
[LEFT_MARGIN_AREA
]
764 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
766 * sizeof (struct glyph
)));
768 /* The mode line never has marginal areas. */
769 if (row
== matrix
->rows
+ dim
.height
- 1
770 || (row
== matrix
->rows
&& matrix
->header_line_p
))
772 row
->glyphs
[TEXT_AREA
]
773 = row
->glyphs
[LEFT_MARGIN_AREA
];
774 row
->glyphs
[RIGHT_MARGIN_AREA
]
775 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
776 row
->glyphs
[LAST_AREA
]
777 = row
->glyphs
[RIGHT_MARGIN_AREA
];
781 row
->glyphs
[TEXT_AREA
]
782 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
783 row
->glyphs
[RIGHT_MARGIN_AREA
]
784 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
785 row
->glyphs
[LAST_AREA
]
786 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
792 xassert (left
>= 0 && right
>= 0);
793 matrix
->left_margin_glyphs
= left
;
794 matrix
->right_margin_glyphs
= right
;
797 /* Number of rows to be used by MATRIX. */
798 matrix
->nrows
= dim
.height
;
799 xassert (matrix
->nrows
>= 0);
803 if (matrix
== w
->current_matrix
)
805 /* Mark rows in a current matrix of a window as not having
806 valid contents. It's important to not do this for
807 desired matrices. When Emacs starts, it may already be
808 building desired matrices when this function runs. */
809 if (window_width
< 0)
810 window_width
= window_box_width (w
, -1);
812 /* Optimize the case that only the height has changed (C-x 2,
813 upper window). Invalidate all rows that are no longer part
815 if (!marginal_areas_changed_p
816 && !header_line_changed_p
818 && dim
.width
== matrix
->matrix_w
819 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
820 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
821 && matrix
->window_width
== window_width
)
823 /* Find the last row in the window. */
824 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
825 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
831 /* Window end is invalid, if inside of the rows that
832 are invalidated below. */
833 if (INTEGERP (w
->window_end_vpos
)
834 && XFASTINT (w
->window_end_vpos
) >= i
)
835 w
->window_end_valid
= Qnil
;
837 while (i
< matrix
->nrows
)
838 matrix
->rows
[i
++].enabled_p
= 0;
842 for (i
= 0; i
< matrix
->nrows
; ++i
)
843 matrix
->rows
[i
].enabled_p
= 0;
846 else if (matrix
== w
->desired_matrix
)
848 /* Rows in desired matrices always have to be cleared;
849 redisplay expects this is the case when it runs, so it
850 had better be the case when we adjust matrices between
852 for (i
= 0; i
< matrix
->nrows
; ++i
)
853 matrix
->rows
[i
].enabled_p
= 0;
858 /* Remember last values to be able to optimize frame redraws. */
859 matrix
->matrix_x
= x
;
860 matrix
->matrix_y
= y
;
861 matrix
->matrix_w
= dim
.width
;
862 matrix
->matrix_h
= dim
.height
;
864 /* Record the top y location and height of W at the time the matrix
865 was last adjusted. This is used to optimize redisplay above. */
868 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
869 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
870 matrix
->window_height
= window_height
;
871 matrix
->window_width
= window_width
;
872 matrix
->window_vscroll
= w
->vscroll
;
877 /* Reverse the contents of rows in MATRIX between START and END. The
878 contents of the row at END - 1 end up at START, END - 2 at START +
879 1 etc. This is part of the implementation of rotate_matrix (see
883 reverse_rows (matrix
, start
, end
)
884 struct glyph_matrix
*matrix
;
889 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
891 /* Non-ISO HP/UX compiler doesn't like auto struct
893 struct glyph_row temp
;
894 temp
= matrix
->rows
[i
];
895 matrix
->rows
[i
] = matrix
->rows
[j
];
896 matrix
->rows
[j
] = temp
;
901 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
902 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
903 indices. (Note: this does not copy glyphs, only glyph pointers in
904 row structures are moved around).
906 The algorithm used for rotating the vector was, I believe, first
907 described by Kernighan. See the vector R as consisting of two
908 sub-vectors AB, where A has length BY for BY >= 0. The result
909 after rotating is then BA. Reverse both sub-vectors to get ArBr
910 and reverse the result to get (ArBr)r which is BA. Similar for
914 rotate_matrix (matrix
, first
, last
, by
)
915 struct glyph_matrix
*matrix
;
920 /* Up (rotate left, i.e. towards lower indices). */
922 reverse_rows (matrix
, first
, first
+ by
);
923 reverse_rows (matrix
, first
+ by
, last
);
924 reverse_rows (matrix
, first
, last
);
928 /* Down (rotate right, i.e. towards higher indices). */
929 reverse_rows (matrix
, last
- by
, last
);
930 reverse_rows (matrix
, first
, last
- by
);
931 reverse_rows (matrix
, first
, last
);
936 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
937 with indices START <= index < END. Increment positions by DELTA/
941 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
942 struct glyph_matrix
*matrix
;
943 int start
, end
, delta
, delta_bytes
;
945 /* Check that START and END are reasonable values. */
946 xassert (start
>= 0 && start
<= matrix
->nrows
);
947 xassert (end
>= 0 && end
<= matrix
->nrows
);
948 xassert (start
<= end
);
950 for (; start
< end
; ++start
)
951 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
955 /* Enable a range of rows in glyph matrix MATRIX. START and END are
956 the row indices of the first and last + 1 row to enable. If
957 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
960 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
961 struct glyph_matrix
*matrix
;
965 xassert (start
<= end
);
966 xassert (start
>= 0 && start
< matrix
->nrows
);
967 xassert (end
>= 0 && end
<= matrix
->nrows
);
969 for (; start
< end
; ++start
)
970 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
976 This empties all rows in MATRIX by setting the enabled_p flag for
977 all rows of the matrix to zero. The function prepare_desired_row
978 will eventually really clear a row when it sees one with a zero
981 Resets update hints to defaults value. The only update hint
982 currently present is the flag MATRIX->no_scrolling_p. */
985 clear_glyph_matrix (matrix
)
986 struct glyph_matrix
*matrix
;
990 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
991 matrix
->no_scrolling_p
= 0;
996 /* Shift part of the glyph matrix MATRIX of window W up or down.
997 Increment y-positions in glyph rows between START and END by DY,
998 and recompute their visible height. */
1001 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
1003 struct glyph_matrix
*matrix
;
1008 xassert (start
<= end
);
1009 xassert (start
>= 0 && start
< matrix
->nrows
);
1010 xassert (end
>= 0 && end
<= matrix
->nrows
);
1012 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1013 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1015 for (; start
< end
; ++start
)
1017 struct glyph_row
*row
= &matrix
->rows
[start
];
1020 row
->visible_height
= row
->height
;
1023 row
->visible_height
-= min_y
- row
->y
;
1024 if (row
->y
+ row
->height
> max_y
)
1025 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1030 /* Mark all rows in current matrices of frame F as invalid. Marking
1031 invalid is done by setting enabled_p to zero for all rows in a
1035 clear_current_matrices (f
)
1036 register struct frame
*f
;
1038 /* Clear frame current matrix, if we have one. */
1039 if (f
->current_matrix
)
1040 clear_glyph_matrix (f
->current_matrix
);
1042 /* Clear the matrix of the menu bar window, if such a window exists.
1043 The menu bar window is currently used to display menus on X when
1044 no toolkit support is compiled in. */
1045 if (WINDOWP (f
->menu_bar_window
))
1046 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1048 /* Clear the matrix of the tool-bar window, if any. */
1049 if (WINDOWP (f
->tool_bar_window
))
1050 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1052 /* Clear current window matrices. */
1053 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1054 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1058 /* Clear out all display lines of F for a coming redisplay. */
1061 clear_desired_matrices (f
)
1062 register struct frame
*f
;
1064 if (f
->desired_matrix
)
1065 clear_glyph_matrix (f
->desired_matrix
);
1067 if (WINDOWP (f
->menu_bar_window
))
1068 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1070 if (WINDOWP (f
->tool_bar_window
))
1071 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1073 /* Do it for window matrices. */
1074 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1075 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1079 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1080 non-zero clear desired matrices, otherwise clear current matrices. */
1083 clear_window_matrices (w
, desired_p
)
1089 if (!NILP (w
->hchild
))
1091 xassert (WINDOWP (w
->hchild
));
1092 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1094 else if (!NILP (w
->vchild
))
1096 xassert (WINDOWP (w
->vchild
));
1097 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1102 clear_glyph_matrix (w
->desired_matrix
);
1105 clear_glyph_matrix (w
->current_matrix
);
1106 w
->window_end_valid
= Qnil
;
1110 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1116 /***********************************************************************
1119 See dispextern.h for an overall explanation of glyph rows.
1120 ***********************************************************************/
1122 /* Clear glyph row ROW. Do it in a way that makes it robust against
1123 changes in the glyph_row structure, i.e. addition or removal of
1124 structure members. */
1126 static struct glyph_row null_row
;
1129 clear_glyph_row (row
)
1130 struct glyph_row
*row
;
1132 struct glyph
*p
[1 + LAST_AREA
];
1134 /* Save pointers. */
1135 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1136 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1137 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1138 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1143 /* Restore pointers. */
1144 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1145 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1146 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1147 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1149 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1150 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1151 Redisplay outputs such glyphs, and flickering effects were
1152 the result. This also depended on the contents of memory
1153 returned by xmalloc. If flickering happens again, activate
1154 the code below. If the flickering is gone with that, chances
1155 are that the flickering has the same reason as here. */
1156 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1161 /* Make ROW an empty, enabled row of canonical character height,
1162 in window W starting at y-position Y. */
1165 blank_row (w
, row
, y
)
1167 struct glyph_row
*row
;
1172 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1173 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1175 clear_glyph_row (row
);
1177 row
->ascent
= row
->phys_ascent
= 0;
1178 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1179 row
->visible_height
= row
->height
;
1182 row
->visible_height
-= min_y
- row
->y
;
1183 if (row
->y
+ row
->height
> max_y
)
1184 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1190 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1191 are the amounts by which to change positions. Note that the first
1192 glyph of the text area of a row can have a buffer position even if
1193 the used count of the text area is zero. Such rows display line
1197 increment_row_positions (row
, delta
, delta_bytes
)
1198 struct glyph_row
*row
;
1199 int delta
, delta_bytes
;
1203 /* Increment start and end positions. */
1204 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1205 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1206 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1207 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1209 if (!row
->enabled_p
)
1212 /* Increment positions in glyphs. */
1213 for (area
= 0; area
< LAST_AREA
; ++area
)
1214 for (i
= 0; i
< row
->used
[area
]; ++i
)
1215 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1216 && row
->glyphs
[area
][i
].charpos
> 0)
1217 row
->glyphs
[area
][i
].charpos
+= delta
;
1219 /* Capture the case of rows displaying a line end. */
1220 if (row
->used
[TEXT_AREA
] == 0
1221 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1222 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1227 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1228 contents, i.e. glyph structure contents are exchanged between A and
1229 B without changing glyph pointers in A and B. */
1232 swap_glyphs_in_rows (a
, b
)
1233 struct glyph_row
*a
, *b
;
1237 for (area
= 0; area
< LAST_AREA
; ++area
)
1239 /* Number of glyphs to swap. */
1240 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1242 /* Start of glyphs in area of row A. */
1243 struct glyph
*glyph_a
= a
->glyphs
[area
];
1245 /* End + 1 of glyphs in area of row A. */
1246 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1248 /* Start of glyphs in area of row B. */
1249 struct glyph
*glyph_b
= b
->glyphs
[area
];
1251 while (glyph_a
< glyph_a_end
)
1253 /* Non-ISO HP/UX compiler doesn't like auto struct
1257 *glyph_a
= *glyph_b
;
1267 /* Exchange pointers to glyph memory between glyph rows A and B. */
1270 swap_glyph_pointers (a
, b
)
1271 struct glyph_row
*a
, *b
;
1274 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1276 struct glyph
*temp
= a
->glyphs
[i
];
1277 a
->glyphs
[i
] = b
->glyphs
[i
];
1278 b
->glyphs
[i
] = temp
;
1283 /* Copy glyph row structure FROM to glyph row structure TO, except
1284 that glyph pointers in the structures are left unchanged. */
1287 copy_row_except_pointers (to
, from
)
1288 struct glyph_row
*to
, *from
;
1290 struct glyph
*pointers
[1 + LAST_AREA
];
1292 /* Save glyph pointers of TO. */
1293 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1295 /* Do a structure assignment. */
1298 /* Restore original pointers of TO. */
1299 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1303 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1304 TO and FROM are left unchanged. Glyph contents are copied from the
1305 glyph memory of FROM to the glyph memory of TO. Increment buffer
1306 positions in row TO by DELTA/ DELTA_BYTES. */
1309 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1310 struct glyph_row
*to
, *from
;
1311 int delta
, delta_bytes
;
1315 /* This is like a structure assignment TO = FROM, except that
1316 glyph pointers in the rows are left unchanged. */
1317 copy_row_except_pointers (to
, from
);
1319 /* Copy glyphs from FROM to TO. */
1320 for (area
= 0; area
< LAST_AREA
; ++area
)
1321 if (from
->used
[area
])
1322 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1323 from
->used
[area
] * sizeof (struct glyph
));
1325 /* Increment buffer positions in TO by DELTA. */
1326 increment_row_positions (to
, delta
, delta_bytes
);
1330 /* Assign glyph row FROM to glyph row TO. This works like a structure
1331 assignment TO = FROM, except that glyph pointers are not copied but
1332 exchanged between TO and FROM. Pointers must be exchanged to avoid
1336 assign_row (to
, from
)
1337 struct glyph_row
*to
, *from
;
1339 swap_glyph_pointers (to
, from
);
1340 copy_row_except_pointers (to
, from
);
1344 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1345 a row in a window matrix, is a slice of the glyph memory of the
1346 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1347 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1348 memory of FRAME_ROW. */
1353 glyph_row_slice_p (window_row
, frame_row
)
1354 struct glyph_row
*window_row
, *frame_row
;
1356 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1357 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1358 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1360 return (frame_glyph_start
<= window_glyph_start
1361 && window_glyph_start
< frame_glyph_end
);
1364 #endif /* GLYPH_DEBUG */
1368 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1369 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1370 in WINDOW_MATRIX is found satisfying the condition. */
1372 static struct glyph_row
*
1373 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1374 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1379 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1381 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1382 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1383 frame_matrix
->rows
+ row
))
1386 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1391 /* Prepare ROW for display. Desired rows are cleared lazily,
1392 i.e. they are only marked as to be cleared by setting their
1393 enabled_p flag to zero. When a row is to be displayed, a prior
1394 call to this function really clears it. */
1397 prepare_desired_row (row
)
1398 struct glyph_row
*row
;
1400 if (!row
->enabled_p
)
1402 clear_glyph_row (row
);
1408 /* Return a hash code for glyph row ROW. */
1411 line_hash_code (row
)
1412 struct glyph_row
*row
;
1418 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1419 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1423 int c
= glyph
->u
.ch
;
1424 int face_id
= glyph
->face_id
;
1425 if (must_write_spaces
)
1427 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1428 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1440 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1441 the number of characters in the line. If must_write_spaces is
1442 zero, leading and trailing spaces are ignored. */
1445 line_draw_cost (matrix
, vpos
)
1446 struct glyph_matrix
*matrix
;
1449 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1450 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1451 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1453 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1454 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1456 /* Ignore trailing and leading spaces if we can. */
1457 if (!must_write_spaces
)
1459 /* Skip from the end over trailing spaces. */
1460 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1463 /* All blank line. */
1467 /* Skip over leading spaces. */
1468 while (CHAR_GLYPH_SPACE_P (*beg
))
1472 /* If we don't have a glyph-table, each glyph is one character,
1473 so return the number of glyphs. */
1474 if (glyph_table_base
== 0)
1478 /* Otherwise, scan the glyphs and accumulate their total length
1483 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1486 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1489 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1499 /* Test two glyph rows A and B for equality. Value is non-zero if A
1500 and B have equal contents. W is the window to which the glyphs
1501 rows A and B belong. It is needed here to test for partial row
1502 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1503 flags of A and B, too. */
1506 row_equal_p (w
, a
, b
, mouse_face_p
)
1508 struct glyph_row
*a
, *b
;
1513 else if (a
->hash
!= b
->hash
)
1517 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1520 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1523 /* Compare glyphs. */
1524 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1526 if (a
->used
[area
] != b
->used
[area
])
1529 a_glyph
= a
->glyphs
[area
];
1530 a_end
= a_glyph
+ a
->used
[area
];
1531 b_glyph
= b
->glyphs
[area
];
1533 while (a_glyph
< a_end
1534 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1535 ++a_glyph
, ++b_glyph
;
1537 if (a_glyph
!= a_end
)
1541 if (a
->fill_line_p
!= b
->fill_line_p
1542 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1543 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1544 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1545 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1546 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1547 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1548 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1549 || a
->overlapped_p
!= b
->overlapped_p
1550 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1551 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1552 /* Different partially visible characters on left margin. */
1554 /* Different height. */
1555 || a
->ascent
!= b
->ascent
1556 || a
->phys_ascent
!= b
->phys_ascent
1557 || a
->phys_height
!= b
->phys_height
1558 || a
->visible_height
!= b
->visible_height
)
1567 /***********************************************************************
1570 See dispextern.h for an overall explanation of glyph pools.
1571 ***********************************************************************/
1573 /* Allocate a glyph_pool structure. The structure returned is
1574 initialized with zeros. The global variable glyph_pool_count is
1575 incremented for each pool allocated. */
1577 static struct glyph_pool
*
1580 struct glyph_pool
*result
;
1582 /* Allocate a new glyph_pool and clear it. */
1583 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1584 bzero (result
, sizeof *result
);
1586 /* For memory leak and double deletion checking. */
1593 /* Free a glyph_pool structure POOL. The function may be called with
1594 a null POOL pointer. The global variable glyph_pool_count is
1595 decremented with every pool structure freed. If this count gets
1596 negative, more structures were freed than allocated, i.e. one
1597 structure must have been freed more than once or a bogus pointer
1598 was passed to free_glyph_pool. */
1601 free_glyph_pool (pool
)
1602 struct glyph_pool
*pool
;
1606 /* More freed than allocated? */
1608 xassert (glyph_pool_count
>= 0);
1610 xfree (pool
->glyphs
);
1616 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1617 columns we need. This function never shrinks a pool. The only
1618 case in which this would make sense, would be when a frame's size
1619 is changed from a large value to a smaller one. But, if someone
1620 does it once, we can expect that he will do it again.
1622 Value is non-zero if the pool changed in a way which makes
1623 re-adjusting window glyph matrices necessary. */
1626 realloc_glyph_pool (pool
, matrix_dim
)
1627 struct glyph_pool
*pool
;
1628 struct dim matrix_dim
;
1633 changed_p
= (pool
->glyphs
== 0
1634 || matrix_dim
.height
!= pool
->nrows
1635 || matrix_dim
.width
!= pool
->ncolumns
);
1637 /* Enlarge the glyph pool. */
1638 needed
= matrix_dim
.width
* matrix_dim
.height
;
1639 if (needed
> pool
->nglyphs
)
1641 int size
= needed
* sizeof (struct glyph
);
1644 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1647 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1648 bzero (pool
->glyphs
, size
);
1651 pool
->nglyphs
= needed
;
1654 /* Remember the number of rows and columns because (a) we use them
1655 to do sanity checks, and (b) the number of columns determines
1656 where rows in the frame matrix start---this must be available to
1657 determine pointers to rows of window sub-matrices. */
1658 pool
->nrows
= matrix_dim
.height
;
1659 pool
->ncolumns
= matrix_dim
.width
;
1666 /***********************************************************************
1668 ***********************************************************************/
1673 /* Flush standard output. This is sometimes useful to call from
1683 /* Check that no glyph pointers have been lost in MATRIX. If a
1684 pointer has been lost, e.g. by using a structure assignment between
1685 rows, at least one pointer must occur more than once in the rows of
1689 check_matrix_pointer_lossage (matrix
)
1690 struct glyph_matrix
*matrix
;
1694 for (i
= 0; i
< matrix
->nrows
; ++i
)
1695 for (j
= 0; j
< matrix
->nrows
; ++j
)
1697 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1698 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1702 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1705 matrix_row (matrix
, row
)
1706 struct glyph_matrix
*matrix
;
1709 xassert (matrix
&& matrix
->rows
);
1710 xassert (row
>= 0 && row
< matrix
->nrows
);
1712 /* That's really too slow for normal testing because this function
1713 is called almost everywhere. Although---it's still astonishingly
1714 fast, so it is valuable to have for debugging purposes. */
1716 check_matrix_pointer_lossage (matrix
);
1719 return matrix
->rows
+ row
;
1723 #if 0 /* This function makes invalid assumptions when text is
1724 partially invisible. But it might come handy for debugging
1727 /* Check invariants that must hold for an up to date current matrix of
1731 check_matrix_invariants (w
)
1734 struct glyph_matrix
*matrix
= w
->current_matrix
;
1735 int yb
= window_text_bottom_y (w
);
1736 struct glyph_row
*row
= matrix
->rows
;
1737 struct glyph_row
*last_text_row
= NULL
;
1738 struct buffer
*saved
= current_buffer
;
1739 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1742 /* This can sometimes happen for a fresh window. */
1743 if (matrix
->nrows
< 2)
1746 set_buffer_temp (buffer
);
1748 /* Note: last row is always reserved for the mode line. */
1749 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1750 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1752 struct glyph_row
*next
= row
+ 1;
1754 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1755 last_text_row
= row
;
1757 /* Check that character and byte positions are in sync. */
1758 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1759 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1761 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1762 have such a position temporarily in case of a minibuffer
1763 displaying something like `[Sole completion]' at its end. */
1764 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1765 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1766 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1768 /* Check that end position of `row' is equal to start position
1770 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1772 xassert (MATRIX_ROW_END_CHARPOS (row
)
1773 == MATRIX_ROW_START_CHARPOS (next
));
1774 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1775 == MATRIX_ROW_START_BYTEPOS (next
));
1780 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1781 xassert (w
->desired_matrix
->rows
!= NULL
);
1782 set_buffer_temp (saved
);
1787 #endif /* GLYPH_DEBUG != 0 */
1791 /**********************************************************************
1792 Allocating/ Adjusting Glyph Matrices
1793 **********************************************************************/
1795 /* Allocate glyph matrices over a window tree for a frame-based
1798 X and Y are column/row within the frame glyph matrix where
1799 sub-matrices for the window tree rooted at WINDOW must be
1800 allocated. CH_DIM contains the dimensions of the smallest
1801 character that could be used during display. DIM_ONLY_P non-zero
1802 means that the caller of this function is only interested in the
1803 result matrix dimension, and matrix adjustments should not be
1806 The function returns the total width/height of the sub-matrices of
1807 the window tree. If called on a frame root window, the computation
1808 will take the mini-buffer window into account.
1810 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1812 NEW_LEAF_MATRIX set if any window in the tree did not have a
1813 glyph matrices yet, and
1815 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1816 any window in the tree will be changed or have been changed (see
1819 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1822 Windows are arranged into chains of windows on the same level
1823 through the next fields of window structures. Such a level can be
1824 either a sequence of horizontally adjacent windows from left to
1825 right, or a sequence of vertically adjacent windows from top to
1826 bottom. Each window in a horizontal sequence can be either a leaf
1827 window or a vertical sequence; a window in a vertical sequence can
1828 be either a leaf or a horizontal sequence. All windows in a
1829 horizontal sequence have the same height, and all windows in a
1830 vertical sequence have the same width.
1832 This function uses, for historical reasons, a more general
1833 algorithm to determine glyph matrix dimensions that would be
1836 The matrix height of a horizontal sequence is determined by the
1837 maximum height of any matrix in the sequence. The matrix width of
1838 a horizontal sequence is computed by adding up matrix widths of
1839 windows in the sequence.
1841 |<------- result width ------->|
1842 +---------+----------+---------+ ---
1845 +---------+ | | result height
1850 The matrix width of a vertical sequence is the maximum matrix width
1851 of any window in the sequence. Its height is computed by adding up
1852 matrix heights of windows in the sequence.
1854 |<---- result width -->|
1862 +------------+---------+ |
1865 +------------+---------+ --- */
1867 /* Bit indicating that a new matrix will be allocated or has been
1870 #define NEW_LEAF_MATRIX (1 << 0)
1872 /* Bit indicating that a matrix will or has changed its location or
1875 #define CHANGED_LEAF_MATRIX (1 << 1)
1878 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1879 window_change_flags
)
1883 int *window_change_flags
;
1885 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1887 int wmax
= 0, hmax
= 0;
1891 int in_horz_combination_p
;
1893 /* What combination is WINDOW part of? Compute this once since the
1894 result is the same for all windows in the `next' chain. The
1895 special case of a root window (parent equal to nil) is treated
1896 like a vertical combination because a root window's `next'
1897 points to the mini-buffer window, if any, which is arranged
1898 vertically below other windows. */
1899 in_horz_combination_p
1900 = (!NILP (XWINDOW (window
)->parent
)
1901 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1903 /* For WINDOW and all windows on the same level. */
1906 w
= XWINDOW (window
);
1908 /* Get the dimension of the window sub-matrix for W, depending
1909 on whether this is a combination or a leaf window. */
1910 if (!NILP (w
->hchild
))
1911 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1913 window_change_flags
);
1914 else if (!NILP (w
->vchild
))
1915 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1917 window_change_flags
);
1920 /* If not already done, allocate sub-matrix structures. */
1921 if (w
->desired_matrix
== NULL
)
1923 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1924 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1925 *window_change_flags
|= NEW_LEAF_MATRIX
;
1928 /* Width and height MUST be chosen so that there are no
1929 holes in the frame matrix. */
1930 dim
.width
= required_matrix_width (w
);
1931 dim
.height
= required_matrix_height (w
);
1933 /* Will matrix be re-allocated? */
1934 if (x
!= w
->desired_matrix
->matrix_x
1935 || y
!= w
->desired_matrix
->matrix_y
1936 || dim
.width
!= w
->desired_matrix
->matrix_w
1937 || dim
.height
!= w
->desired_matrix
->matrix_h
1938 || (margin_glyphs_to_reserve (w
, dim
.width
,
1939 w
->left_margin_cols
)
1940 != w
->desired_matrix
->left_margin_glyphs
)
1941 || (margin_glyphs_to_reserve (w
, dim
.width
,
1942 w
->right_margin_cols
)
1943 != w
->desired_matrix
->right_margin_glyphs
))
1944 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1946 /* Actually change matrices, if allowed. Do not consider
1947 CHANGED_LEAF_MATRIX computed above here because the pool
1948 may have been changed which we don't now here. We trust
1949 that we only will be called with DIM_ONLY_P != 0 when
1953 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1954 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1958 /* If we are part of a horizontal combination, advance x for
1959 windows to the right of W; otherwise advance y for windows
1961 if (in_horz_combination_p
)
1966 /* Remember maximum glyph matrix dimensions. */
1967 wmax
= max (wmax
, dim
.width
);
1968 hmax
= max (hmax
, dim
.height
);
1970 /* Next window on same level. */
1973 while (!NILP (window
));
1975 /* Set `total' to the total glyph matrix dimension of this window
1976 level. In a vertical combination, the width is the width of the
1977 widest window; the height is the y we finally reached, corrected
1978 by the y we started with. In a horizontal combination, the total
1979 height is the height of the tallest window, and the width is the
1980 x we finally reached, corrected by the x we started with. */
1981 if (in_horz_combination_p
)
1983 total
.width
= x
- x0
;
1984 total
.height
= hmax
;
1989 total
.height
= y
- y0
;
1996 /* Return the required height of glyph matrices for window W. */
1999 required_matrix_height (w
)
2002 #ifdef HAVE_WINDOW_SYSTEM
2003 struct frame
*f
= XFRAME (w
->frame
);
2005 if (FRAME_WINDOW_P (f
))
2007 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2008 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
2009 return (((window_pixel_height
+ ch_height
- 1)
2010 / ch_height
) * w
->nrows_scale_factor
2011 /* One partially visible line at the top and
2012 bottom of the window. */
2014 /* 2 for header and mode line. */
2017 #endif /* HAVE_WINDOW_SYSTEM */
2019 return WINDOW_TOTAL_LINES (w
);
2023 /* Return the required width of glyph matrices for window W. */
2026 required_matrix_width (w
)
2029 #ifdef HAVE_WINDOW_SYSTEM
2030 struct frame
*f
= XFRAME (w
->frame
);
2031 if (FRAME_WINDOW_P (f
))
2033 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2034 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2036 /* Compute number of glyphs needed in a glyph row. */
2037 return (((window_pixel_width
+ ch_width
- 1)
2038 / ch_width
) * w
->ncols_scale_factor
2039 /* 2 partially visible columns in the text area. */
2041 /* One partially visible column at the right
2042 edge of each marginal area. */
2045 #endif /* HAVE_WINDOW_SYSTEM */
2047 return XINT (w
->total_cols
);
2051 /* Allocate window matrices for window-based redisplay. W is the
2052 window whose matrices must be allocated/reallocated. CH_DIM is the
2053 size of the smallest character that could potentially be used on W. */
2056 allocate_matrices_for_window_redisplay (w
)
2061 if (!NILP (w
->vchild
))
2062 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2063 else if (!NILP (w
->hchild
))
2064 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2067 /* W is a leaf window. */
2070 /* If matrices are not yet allocated, allocate them now. */
2071 if (w
->desired_matrix
== NULL
)
2073 w
->desired_matrix
= new_glyph_matrix (NULL
);
2074 w
->current_matrix
= new_glyph_matrix (NULL
);
2077 dim
.width
= required_matrix_width (w
);
2078 dim
.height
= required_matrix_height (w
);
2079 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2080 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2083 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2088 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2089 do it for all frames; otherwise do it just for the given frame.
2090 This function must be called when a new frame is created, its size
2091 changes, or its window configuration changes. */
2097 /* Block input so that expose events and other events that access
2098 glyph matrices are not processed while we are changing them. */
2102 adjust_frame_glyphs (f
);
2105 Lisp_Object tail
, lisp_frame
;
2107 FOR_EACH_FRAME (tail
, lisp_frame
)
2108 adjust_frame_glyphs (XFRAME (lisp_frame
));
2115 /* Adjust frame glyphs when Emacs is initialized.
2117 To be called from init_display.
2119 We need a glyph matrix because redraw will happen soon.
2120 Unfortunately, window sizes on selected_frame are not yet set to
2121 meaningful values. I believe we can assume that there are only two
2122 windows on the frame---the mini-buffer and the root window. Frame
2123 height and width seem to be correct so far. So, set the sizes of
2124 windows to estimated values. */
2127 adjust_frame_glyphs_initially ()
2129 struct frame
*sf
= SELECTED_FRAME ();
2130 struct window
*root
= XWINDOW (sf
->root_window
);
2131 struct window
*mini
= XWINDOW (root
->next
);
2132 int frame_lines
= FRAME_LINES (sf
);
2133 int frame_cols
= FRAME_COLS (sf
);
2134 int top_margin
= FRAME_TOP_MARGIN (sf
);
2136 /* Do it for the root window. */
2137 XSETFASTINT (root
->top_line
, top_margin
);
2138 XSETFASTINT (root
->total_cols
, frame_cols
);
2139 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2141 /* Do it for the mini-buffer window. */
2142 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2143 XSETFASTINT (mini
->total_cols
, frame_cols
);
2144 set_window_height (root
->next
, 1, 0);
2146 adjust_frame_glyphs (sf
);
2147 glyphs_initialized_initially_p
= 1;
2151 /* Allocate/reallocate glyph matrices of a single frame F. */
2154 adjust_frame_glyphs (f
)
2157 if (FRAME_WINDOW_P (f
))
2158 adjust_frame_glyphs_for_window_redisplay (f
);
2160 adjust_frame_glyphs_for_frame_redisplay (f
);
2162 /* Don't forget the message buffer and the buffer for
2163 decode_mode_spec. */
2164 adjust_frame_message_buffer (f
);
2165 adjust_decode_mode_spec_buffer (f
);
2167 f
->glyphs_initialized_p
= 1;
2171 /* In the window tree with root W, build current matrices of leaf
2172 windows from the frame's current matrix. */
2175 fake_current_matrices (window
)
2180 for (; !NILP (window
); window
= w
->next
)
2182 w
= XWINDOW (window
);
2184 if (!NILP (w
->hchild
))
2185 fake_current_matrices (w
->hchild
);
2186 else if (!NILP (w
->vchild
))
2187 fake_current_matrices (w
->vchild
);
2191 struct frame
*f
= XFRAME (w
->frame
);
2192 struct glyph_matrix
*m
= w
->current_matrix
;
2193 struct glyph_matrix
*fm
= f
->current_matrix
;
2195 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2196 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2198 for (i
= 0; i
< m
->matrix_h
; ++i
)
2200 struct glyph_row
*r
= m
->rows
+ i
;
2201 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2203 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2204 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2206 r
->enabled_p
= fr
->enabled_p
;
2209 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2210 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2211 r
->used
[TEXT_AREA
] = (m
->matrix_w
2212 - r
->used
[LEFT_MARGIN_AREA
]
2213 - r
->used
[RIGHT_MARGIN_AREA
]);
2222 /* Save away the contents of frame F's current frame matrix. Value is
2223 a glyph matrix holding the contents of F's current frame matrix. */
2225 static struct glyph_matrix
*
2226 save_current_matrix (f
)
2230 struct glyph_matrix
*saved
;
2232 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2233 bzero (saved
, sizeof *saved
);
2234 saved
->nrows
= f
->current_matrix
->nrows
;
2235 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2236 * sizeof *saved
->rows
);
2237 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2239 for (i
= 0; i
< saved
->nrows
; ++i
)
2241 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2242 struct glyph_row
*to
= saved
->rows
+ i
;
2243 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2244 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2245 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2246 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2253 /* Restore the contents of frame F's current frame matrix from SAVED,
2254 and free memory associated with SAVED. */
2257 restore_current_matrix (f
, saved
)
2259 struct glyph_matrix
*saved
;
2263 for (i
= 0; i
< saved
->nrows
; ++i
)
2265 struct glyph_row
*from
= saved
->rows
+ i
;
2266 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2267 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2268 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2269 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2270 xfree (from
->glyphs
[TEXT_AREA
]);
2273 xfree (saved
->rows
);
2279 /* Allocate/reallocate glyph matrices of a single frame F for
2280 frame-based redisplay. */
2283 adjust_frame_glyphs_for_frame_redisplay (f
)
2287 struct dim matrix_dim
;
2289 int window_change_flags
;
2292 if (!FRAME_LIVE_P (f
))
2295 /* Determine the smallest character in any font for F. On
2296 console windows, all characters have dimension (1, 1). */
2297 ch_dim
.width
= ch_dim
.height
= 1;
2299 top_window_y
= FRAME_TOP_MARGIN (f
);
2301 /* Allocate glyph pool structures if not already done. */
2302 if (f
->desired_pool
== NULL
)
2304 f
->desired_pool
= new_glyph_pool ();
2305 f
->current_pool
= new_glyph_pool ();
2308 /* Allocate frames matrix structures if needed. */
2309 if (f
->desired_matrix
== NULL
)
2311 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2312 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2315 /* Compute window glyph matrices. (This takes the mini-buffer
2316 window into account). The result is the size of the frame glyph
2317 matrix needed. The variable window_change_flags is set to a bit
2318 mask indicating whether new matrices will be allocated or
2319 existing matrices change their size or location within the frame
2321 window_change_flags
= 0;
2323 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2326 &window_change_flags
);
2328 /* Add in menu bar lines, if any. */
2329 matrix_dim
.height
+= top_window_y
;
2331 /* Enlarge pools as necessary. */
2332 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2333 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2335 /* Set up glyph pointers within window matrices. Do this only if
2336 absolutely necessary since it requires a frame redraw. */
2337 if (pool_changed_p
|| window_change_flags
)
2339 /* Do it for window matrices. */
2340 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2342 &window_change_flags
);
2344 /* Size of frame matrices must equal size of frame. Note
2345 that we are called for X frames with window widths NOT equal
2346 to the frame width (from CHANGE_FRAME_SIZE_1). */
2347 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2348 && matrix_dim
.height
== FRAME_LINES (f
));
2350 /* Pointers to glyph memory in glyph rows are exchanged during
2351 the update phase of redisplay, which means in general that a
2352 frame's current matrix consists of pointers into both the
2353 desired and current glyph pool of the frame. Adjusting a
2354 matrix sets the frame matrix up so that pointers are all into
2355 the same pool. If we want to preserve glyph contents of the
2356 current matrix over a call to adjust_glyph_matrix, we must
2357 make a copy of the current glyphs, and restore the current
2358 matrix' contents from that copy. */
2359 if (display_completed
2360 && !FRAME_GARBAGED_P (f
)
2361 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2362 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2364 struct glyph_matrix
*copy
= save_current_matrix (f
);
2365 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2366 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2367 restore_current_matrix (f
, copy
);
2368 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2372 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2373 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2374 SET_FRAME_GARBAGED (f
);
2380 /* Allocate/reallocate glyph matrices of a single frame F for
2381 window-based redisplay. */
2384 adjust_frame_glyphs_for_window_redisplay (f
)
2390 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2392 /* Get minimum sizes. */
2393 #ifdef HAVE_WINDOW_SYSTEM
2394 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2395 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2397 ch_dim
.width
= ch_dim
.height
= 1;
2400 /* Allocate/reallocate window matrices. */
2401 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2403 /* Allocate/ reallocate matrices of the dummy window used to display
2404 the menu bar under X when no X toolkit support is available. */
2405 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2407 /* Allocate a dummy window if not already done. */
2408 if (NILP (f
->menu_bar_window
))
2410 f
->menu_bar_window
= make_window ();
2411 w
= XWINDOW (f
->menu_bar_window
);
2412 XSETFRAME (w
->frame
, f
);
2413 w
->pseudo_window_p
= 1;
2416 w
= XWINDOW (f
->menu_bar_window
);
2418 /* Set window dimensions to frame dimensions and allocate or
2419 adjust glyph matrices of W. */
2420 XSETFASTINT (w
->top_line
, 0);
2421 XSETFASTINT (w
->left_col
, 0);
2422 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2423 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2424 allocate_matrices_for_window_redisplay (w
);
2426 #endif /* not USE_X_TOOLKIT */
2429 /* Allocate/ reallocate matrices of the tool bar window. If we
2430 don't have a tool bar window yet, make one. */
2431 if (NILP (f
->tool_bar_window
))
2433 f
->tool_bar_window
= make_window ();
2434 w
= XWINDOW (f
->tool_bar_window
);
2435 XSETFRAME (w
->frame
, f
);
2436 w
->pseudo_window_p
= 1;
2439 w
= XWINDOW (f
->tool_bar_window
);
2441 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2442 XSETFASTINT (w
->left_col
, 0);
2443 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2444 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2445 allocate_matrices_for_window_redisplay (w
);
2450 /* Adjust/ allocate message buffer of frame F.
2452 Note that the message buffer is never freed. Since I could not
2453 find a free in 19.34, I assume that freeing it would be
2454 problematic in some way and don't do it either.
2456 (Implementation note: It should be checked if we can free it
2457 eventually without causing trouble). */
2460 adjust_frame_message_buffer (f
)
2463 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2465 if (FRAME_MESSAGE_BUF (f
))
2467 char *buffer
= FRAME_MESSAGE_BUF (f
);
2468 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2469 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2472 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2476 /* Re-allocate buffer for decode_mode_spec on frame F. */
2479 adjust_decode_mode_spec_buffer (f
)
2482 f
->decode_mode_spec_buffer
2483 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2484 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2489 /**********************************************************************
2490 Freeing Glyph Matrices
2491 **********************************************************************/
2493 /* Free glyph memory for a frame F. F may be null. This function can
2494 be called for the same frame more than once. The root window of
2495 F may be nil when this function is called. This is the case when
2496 the function is called when F is destroyed. */
2502 if (f
&& f
->glyphs_initialized_p
)
2504 /* Block interrupt input so that we don't get surprised by an X
2505 event while we're in an inconsistent state. */
2507 f
->glyphs_initialized_p
= 0;
2509 /* Release window sub-matrices. */
2510 if (!NILP (f
->root_window
))
2511 free_window_matrices (XWINDOW (f
->root_window
));
2513 /* Free the dummy window for menu bars without X toolkit and its
2515 if (!NILP (f
->menu_bar_window
))
2517 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2518 free_glyph_matrix (w
->desired_matrix
);
2519 free_glyph_matrix (w
->current_matrix
);
2520 w
->desired_matrix
= w
->current_matrix
= NULL
;
2521 f
->menu_bar_window
= Qnil
;
2524 /* Free the tool bar window and its glyph matrices. */
2525 if (!NILP (f
->tool_bar_window
))
2527 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2528 free_glyph_matrix (w
->desired_matrix
);
2529 free_glyph_matrix (w
->current_matrix
);
2530 w
->desired_matrix
= w
->current_matrix
= NULL
;
2531 f
->tool_bar_window
= Qnil
;
2534 /* Release frame glyph matrices. Reset fields to zero in
2535 case we are called a second time. */
2536 if (f
->desired_matrix
)
2538 free_glyph_matrix (f
->desired_matrix
);
2539 free_glyph_matrix (f
->current_matrix
);
2540 f
->desired_matrix
= f
->current_matrix
= NULL
;
2543 /* Release glyph pools. */
2544 if (f
->desired_pool
)
2546 free_glyph_pool (f
->desired_pool
);
2547 free_glyph_pool (f
->current_pool
);
2548 f
->desired_pool
= f
->current_pool
= NULL
;
2556 /* Free glyph sub-matrices in the window tree rooted at W. This
2557 function may be called with a null pointer, and it may be called on
2558 the same tree more than once. */
2561 free_window_matrices (w
)
2566 if (!NILP (w
->hchild
))
2567 free_window_matrices (XWINDOW (w
->hchild
));
2568 else if (!NILP (w
->vchild
))
2569 free_window_matrices (XWINDOW (w
->vchild
));
2572 /* This is a leaf window. Free its memory and reset fields
2573 to zero in case this function is called a second time for
2575 free_glyph_matrix (w
->current_matrix
);
2576 free_glyph_matrix (w
->desired_matrix
);
2577 w
->current_matrix
= w
->desired_matrix
= NULL
;
2580 /* Next window on same level. */
2581 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2586 /* Check glyph memory leaks. This function is called from
2587 shut_down_emacs. Note that frames are not destroyed when Emacs
2588 exits. We therefore free all glyph memory for all active frames
2589 explicitly and check that nothing is left allocated. */
2592 check_glyph_memory ()
2594 Lisp_Object tail
, frame
;
2596 /* Free glyph memory for all frames. */
2597 FOR_EACH_FRAME (tail
, frame
)
2598 free_glyphs (XFRAME (frame
));
2600 /* Check that nothing is left allocated. */
2601 if (glyph_matrix_count
)
2603 if (glyph_pool_count
)
2609 /**********************************************************************
2610 Building a Frame Matrix
2611 **********************************************************************/
2613 /* Most of the redisplay code works on glyph matrices attached to
2614 windows. This is a good solution most of the time, but it is not
2615 suitable for terminal code. Terminal output functions cannot rely
2616 on being able to set an arbitrary terminal window. Instead they
2617 must be provided with a view of the whole frame, i.e. the whole
2618 screen. We build such a view by constructing a frame matrix from
2619 window matrices in this section.
2621 Windows that must be updated have their must_be_update_p flag set.
2622 For all such windows, their desired matrix is made part of the
2623 desired frame matrix. For other windows, their current matrix is
2624 made part of the desired frame matrix.
2626 +-----------------+----------------+
2627 | desired | desired |
2629 +-----------------+----------------+
2632 +----------------------------------+
2634 Desired window matrices can be made part of the frame matrix in a
2635 cheap way: We exploit the fact that the desired frame matrix and
2636 desired window matrices share their glyph memory. This is not
2637 possible for current window matrices. Their glyphs are copied to
2638 the desired frame matrix. The latter is equivalent to
2639 preserve_other_columns in the old redisplay.
2641 Used glyphs counters for frame matrix rows are the result of adding
2642 up glyph lengths of the window matrices. A line in the frame
2643 matrix is enabled, if a corresponding line in a window matrix is
2646 After building the desired frame matrix, it will be passed to
2647 terminal code, which will manipulate both the desired and current
2648 frame matrix. Changes applied to the frame's current matrix have
2649 to be visible in current window matrices afterwards, of course.
2651 This problem is solved like this:
2653 1. Window and frame matrices share glyphs. Window matrices are
2654 constructed in a way that their glyph contents ARE the glyph
2655 contents needed in a frame matrix. Thus, any modification of
2656 glyphs done in terminal code will be reflected in window matrices
2659 2. Exchanges of rows in a frame matrix done by terminal code are
2660 intercepted by hook functions so that corresponding row operations
2661 on window matrices can be performed. This is necessary because we
2662 use pointers to glyphs in glyph row structures. To satisfy the
2663 assumption of point 1 above that glyphs are updated implicitly in
2664 window matrices when they are manipulated via the frame matrix,
2665 window and frame matrix must of course agree where to find the
2666 glyphs for their rows. Possible manipulations that must be
2667 mirrored are assignments of rows of the desired frame matrix to the
2668 current frame matrix and scrolling the current frame matrix. */
2670 /* Build frame F's desired matrix from window matrices. Only windows
2671 which have the flag must_be_updated_p set have to be updated. Menu
2672 bar lines of a frame are not covered by window matrices, so make
2673 sure not to touch them in this function. */
2676 build_frame_matrix (f
)
2681 /* F must have a frame matrix when this function is called. */
2682 xassert (!FRAME_WINDOW_P (f
));
2684 /* Clear all rows in the frame matrix covered by window matrices.
2685 Menu bar lines are not covered by windows. */
2686 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2687 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2689 /* Build the matrix by walking the window tree. */
2690 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2691 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2695 /* Walk a window tree, building a frame matrix MATRIX from window
2696 matrices. W is the root of a window tree. */
2699 build_frame_matrix_from_window_tree (matrix
, w
)
2700 struct glyph_matrix
*matrix
;
2705 if (!NILP (w
->hchild
))
2706 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2707 else if (!NILP (w
->vchild
))
2708 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2710 build_frame_matrix_from_leaf_window (matrix
, w
);
2712 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2717 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2718 desired frame matrix built. W is a leaf window whose desired or
2719 current matrix is to be added to FRAME_MATRIX. W's flag
2720 must_be_updated_p determines which matrix it contributes to
2721 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2722 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2723 Adding a desired matrix means setting up used counters and such in
2724 frame rows, while adding a current window matrix to FRAME_MATRIX
2725 means copying glyphs. The latter case corresponds to
2726 preserve_other_columns in the old redisplay. */
2729 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2730 struct glyph_matrix
*frame_matrix
;
2733 struct glyph_matrix
*window_matrix
;
2734 int window_y
, frame_y
;
2735 /* If non-zero, a glyph to insert at the right border of W. */
2736 GLYPH right_border_glyph
= 0;
2738 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2739 if (w
->must_be_updated_p
)
2741 window_matrix
= w
->desired_matrix
;
2743 /* Decide whether we want to add a vertical border glyph. */
2744 if (!WINDOW_RIGHTMOST_P (w
))
2746 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2749 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2750 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2753 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2755 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2759 window_matrix
= w
->current_matrix
;
2761 /* For all rows in the window matrix and corresponding rows in the
2764 frame_y
= window_matrix
->matrix_y
;
2765 while (window_y
< window_matrix
->nrows
)
2767 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2768 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2769 int current_row_p
= window_matrix
== w
->current_matrix
;
2771 /* Fill up the frame row with spaces up to the left margin of the
2773 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2775 /* Fill up areas in the window matrix row with spaces. */
2776 fill_up_glyph_row_with_spaces (window_row
);
2778 /* If only part of W's desired matrix has been built, and
2779 window_row wasn't displayed, use the corresponding current
2781 if (window_matrix
== w
->desired_matrix
2782 && !window_row
->enabled_p
)
2784 window_row
= w
->current_matrix
->rows
+ window_y
;
2790 /* Copy window row to frame row. */
2791 bcopy (window_row
->glyphs
[0],
2792 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2793 window_matrix
->matrix_w
* sizeof (struct glyph
));
2797 xassert (window_row
->enabled_p
);
2799 /* Only when a desired row has been displayed, we want
2800 the corresponding frame row to be updated. */
2801 frame_row
->enabled_p
= 1;
2803 /* Maybe insert a vertical border between horizontally adjacent
2805 if (right_border_glyph
)
2807 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2808 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2812 /* Window row window_y must be a slice of frame row
2814 xassert (glyph_row_slice_p (window_row
, frame_row
));
2816 /* If rows are in sync, we don't have to copy glyphs because
2817 frame and window share glyphs. */
2819 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2820 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2824 /* Set number of used glyphs in the frame matrix. Since we fill
2825 up with spaces, and visit leaf windows from left to right it
2826 can be done simply. */
2827 frame_row
->used
[TEXT_AREA
]
2828 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2836 /* Given a user-specified glyph, possibly including a Lisp-level face
2837 ID, return a glyph that has a realized face ID.
2838 This is used for glyphs displayed specially and not part of the text;
2839 for instance, vertical separators, truncation markers, etc. */
2842 spec_glyph_lookup_face (w
, glyph
)
2846 int lface_id
= FAST_GLYPH_FACE (glyph
);
2847 /* Convert the glyph's specified face to a realized (cache) face. */
2850 int face_id
= merge_faces (XFRAME (w
->frame
),
2851 Qt
, lface_id
, DEFAULT_FACE_ID
);
2853 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2858 /* Add spaces to a glyph row ROW in a window matrix.
2860 Each row has the form:
2862 +---------+-----------------------------+------------+
2863 | left | text | right |
2864 +---------+-----------------------------+------------+
2866 Left and right marginal areas are optional. This function adds
2867 spaces to areas so that there are no empty holes between areas.
2868 In other words: If the right area is not empty, the text area
2869 is filled up with spaces up to the right area. If the text area
2870 is not empty, the left area is filled up.
2872 To be called for frame-based redisplay, only. */
2875 fill_up_glyph_row_with_spaces (row
)
2876 struct glyph_row
*row
;
2878 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2879 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2880 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2884 /* Fill area AREA of glyph row ROW with spaces. To be called for
2885 frame-based redisplay only. */
2888 fill_up_glyph_row_area_with_spaces (row
, area
)
2889 struct glyph_row
*row
;
2892 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2894 struct glyph
*end
= row
->glyphs
[area
+ 1];
2895 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2898 *text
++ = space_glyph
;
2899 row
->used
[area
] = text
- row
->glyphs
[area
];
2904 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2905 reached. In frame matrices only one area, TEXT_AREA, is used. */
2908 fill_up_frame_row_with_spaces (row
, upto
)
2909 struct glyph_row
*row
;
2912 int i
= row
->used
[TEXT_AREA
];
2913 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2916 glyph
[i
++] = space_glyph
;
2918 row
->used
[TEXT_AREA
] = i
;
2923 /**********************************************************************
2924 Mirroring operations on frame matrices in window matrices
2925 **********************************************************************/
2927 /* Set frame being updated via frame-based redisplay to F. This
2928 function must be called before updates to make explicit that we are
2929 working on frame matrices or not. */
2932 set_frame_matrix_frame (f
)
2935 frame_matrix_frame
= f
;
2939 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2940 DESIRED_MATRIX is the desired matrix corresponding to
2941 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2942 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2943 frame_matrix_frame is non-null, this indicates that the exchange is
2944 done in frame matrices, and that we have to perform analogous
2945 operations in window matrices of frame_matrix_frame. */
2948 make_current (desired_matrix
, current_matrix
, row
)
2949 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2952 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2953 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2954 int mouse_face_p
= current_row
->mouse_face_p
;
2956 /* Do current_row = desired_row. This exchanges glyph pointers
2957 between both rows, and does a structure assignment otherwise. */
2958 assign_row (current_row
, desired_row
);
2960 /* Enable current_row to mark it as valid. */
2961 current_row
->enabled_p
= 1;
2962 current_row
->mouse_face_p
= mouse_face_p
;
2964 /* If we are called on frame matrices, perform analogous operations
2965 for window matrices. */
2966 if (frame_matrix_frame
)
2967 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2971 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2972 W's frame which has been made current (by swapping pointers between
2973 current and desired matrix). Perform analogous operations in the
2974 matrices of leaf windows in the window tree rooted at W. */
2977 mirror_make_current (w
, frame_row
)
2983 if (!NILP (w
->hchild
))
2984 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2985 else if (!NILP (w
->vchild
))
2986 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2989 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2990 here because the checks performed in debug mode there
2991 will not allow the conversion. */
2992 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2994 /* If FRAME_ROW is within W, assign the desired row to the
2995 current row (exchanging glyph pointers). */
2996 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2998 struct glyph_row
*current_row
2999 = MATRIX_ROW (w
->current_matrix
, row
);
3000 struct glyph_row
*desired_row
3001 = MATRIX_ROW (w
->desired_matrix
, row
);
3003 if (desired_row
->enabled_p
)
3004 assign_row (current_row
, desired_row
);
3006 swap_glyph_pointers (desired_row
, current_row
);
3007 current_row
->enabled_p
= 1;
3011 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3016 /* Perform row dance after scrolling. We are working on the range of
3017 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3018 including) in MATRIX. COPY_FROM is a vector containing, for each
3019 row I in the range 0 <= I < NLINES, the index of the original line
3020 to move to I. This index is relative to the row range, i.e. 0 <=
3021 index < NLINES. RETAINED_P is a vector containing zero for each
3022 row 0 <= I < NLINES which is empty.
3024 This function is called from do_scrolling and do_direct_scrolling. */
3027 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3029 struct glyph_matrix
*matrix
;
3030 int unchanged_at_top
, nlines
;
3034 /* A copy of original rows. */
3035 struct glyph_row
*old_rows
;
3037 /* Rows to assign to. */
3038 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3042 /* Make a copy of the original rows. */
3043 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3044 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3046 /* Assign new rows, maybe clear lines. */
3047 for (i
= 0; i
< nlines
; ++i
)
3049 int enabled_before_p
= new_rows
[i
].enabled_p
;
3051 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3052 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3053 new_rows
[i
] = old_rows
[copy_from
[i
]];
3054 new_rows
[i
].enabled_p
= enabled_before_p
;
3056 /* RETAINED_P is zero for empty lines. */
3057 if (!retained_p
[copy_from
[i
]])
3058 new_rows
[i
].enabled_p
= 0;
3061 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3062 if (frame_matrix_frame
)
3063 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3064 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3068 /* Synchronize glyph pointers in the current matrix of window W with
3069 the current frame matrix. */
3072 sync_window_with_frame_matrix_rows (w
)
3075 struct frame
*f
= XFRAME (w
->frame
);
3076 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3077 int left
, right
, x
, width
;
3079 /* Preconditions: W must be a leaf window on a tty frame. */
3080 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3081 xassert (!FRAME_WINDOW_P (f
));
3083 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3084 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3085 x
= w
->current_matrix
->matrix_x
;
3086 width
= w
->current_matrix
->matrix_w
;
3088 window_row
= w
->current_matrix
->rows
;
3089 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3090 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3092 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3094 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3095 = frame_row
->glyphs
[0] + x
;
3096 window_row
->glyphs
[TEXT_AREA
]
3097 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3098 window_row
->glyphs
[LAST_AREA
]
3099 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3100 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3101 = window_row
->glyphs
[LAST_AREA
] - right
;
3106 /* Return the window in the window tree rooted in W containing frame
3107 row ROW. Value is null if none is found. */
3110 frame_row_to_window (w
, row
)
3114 struct window
*found
= NULL
;
3118 if (!NILP (w
->hchild
))
3119 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3120 else if (!NILP (w
->vchild
))
3121 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3122 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3123 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3126 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3133 /* Perform a line dance in the window tree rooted at W, after
3134 scrolling a frame matrix in mirrored_line_dance.
3136 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3137 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3138 COPY_FROM is a vector containing, for each row I in the range 0 <=
3139 I < NLINES, the index of the original line to move to I. This
3140 index is relative to the row range, i.e. 0 <= index < NLINES.
3141 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3145 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3147 int unchanged_at_top
, nlines
;
3153 if (!NILP (w
->hchild
))
3154 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3155 nlines
, copy_from
, retained_p
);
3156 else if (!NILP (w
->vchild
))
3157 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3158 nlines
, copy_from
, retained_p
);
3161 /* W is a leaf window, and we are working on its current
3163 struct glyph_matrix
*m
= w
->current_matrix
;
3165 struct glyph_row
*old_rows
;
3167 /* Make a copy of the original rows of matrix m. */
3168 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3169 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3171 for (i
= 0; i
< nlines
; ++i
)
3173 /* Frame relative line assigned to. */
3174 int frame_to
= i
+ unchanged_at_top
;
3176 /* Frame relative line assigned. */
3177 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3179 /* Window relative line assigned to. */
3180 int window_to
= frame_to
- m
->matrix_y
;
3182 /* Window relative line assigned. */
3183 int window_from
= frame_from
- m
->matrix_y
;
3185 /* Is assigned line inside window? */
3186 int from_inside_window_p
3187 = window_from
>= 0 && window_from
< m
->matrix_h
;
3189 /* Is assigned to line inside window? */
3190 int to_inside_window_p
3191 = window_to
>= 0 && window_to
< m
->matrix_h
;
3193 if (from_inside_window_p
&& to_inside_window_p
)
3195 /* Enabled setting before assignment. */
3196 int enabled_before_p
;
3198 /* Do the assignment. The enabled_p flag is saved
3199 over the assignment because the old redisplay did
3201 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3202 m
->rows
[window_to
] = old_rows
[window_from
];
3203 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3205 /* If frame line is empty, window line is empty, too. */
3206 if (!retained_p
[copy_from
[i
]])
3207 m
->rows
[window_to
].enabled_p
= 0;
3209 else if (to_inside_window_p
)
3211 /* A copy between windows. This is an infrequent
3212 case not worth optimizing. */
3213 struct frame
*f
= XFRAME (w
->frame
);
3214 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3216 struct glyph_matrix
*m2
;
3219 w2
= frame_row_to_window (root
, frame_from
);
3220 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3221 -nw', FROM_FRAME sometimes has no associated window.
3222 This check avoids a segfault if W2 is null. */
3225 m2
= w2
->current_matrix
;
3226 m2_from
= frame_from
- m2
->matrix_y
;
3227 copy_row_except_pointers (m
->rows
+ window_to
,
3228 m2
->rows
+ m2_from
);
3230 /* If frame line is empty, window line is empty, too. */
3231 if (!retained_p
[copy_from
[i
]])
3232 m
->rows
[window_to
].enabled_p
= 0;
3236 else if (from_inside_window_p
)
3240 /* If there was a copy between windows, make sure glyph
3241 pointers are in sync with the frame matrix. */
3243 sync_window_with_frame_matrix_rows (w
);
3245 /* Check that no pointers are lost. */
3249 /* Next window on same level. */
3250 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3257 /* Check that window and frame matrices agree about their
3258 understanding where glyphs of the rows are to find. For each
3259 window in the window tree rooted at W, check that rows in the
3260 matrices of leaf window agree with their frame matrices about
3264 check_window_matrix_pointers (w
)
3269 if (!NILP (w
->hchild
))
3270 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3271 else if (!NILP (w
->vchild
))
3272 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3275 struct frame
*f
= XFRAME (w
->frame
);
3276 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3277 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3280 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3285 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3286 a window and FRAME_MATRIX is the corresponding frame matrix. For
3287 each row in WINDOW_MATRIX check that it's a slice of the
3288 corresponding frame row. If it isn't, abort. */
3291 check_matrix_pointers (window_matrix
, frame_matrix
)
3292 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3294 /* Row number in WINDOW_MATRIX. */
3297 /* Row number corresponding to I in FRAME_MATRIX. */
3298 int j
= window_matrix
->matrix_y
;
3300 /* For all rows check that the row in the window matrix is a
3301 slice of the row in the frame matrix. If it isn't we didn't
3302 mirror an operation on the frame matrix correctly. */
3303 while (i
< window_matrix
->nrows
)
3305 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3306 frame_matrix
->rows
+ j
))
3312 #endif /* GLYPH_DEBUG != 0 */
3316 /**********************************************************************
3317 VPOS and HPOS translations
3318 **********************************************************************/
3322 /* Translate vertical position VPOS which is relative to window W to a
3323 vertical position relative to W's frame. */
3326 window_to_frame_vpos (w
, vpos
)
3330 struct frame
*f
= XFRAME (w
->frame
);
3332 xassert (!FRAME_WINDOW_P (f
));
3333 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3334 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3335 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3340 /* Translate horizontal position HPOS which is relative to window W to
3341 a horizontal position relative to W's frame. */
3344 window_to_frame_hpos (w
, hpos
)
3348 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3349 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3353 #endif /* GLYPH_DEBUG */
3357 /**********************************************************************
3359 **********************************************************************/
3361 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3362 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3368 CHECK_LIVE_FRAME (frame
);
3371 /* Ignore redraw requests, if frame has no glyphs yet.
3372 (Implementation note: It still has to be checked why we are
3373 called so early here). */
3374 if (!glyphs_initialized_initially_p
)
3378 if (FRAME_MSDOS_P (f
))
3379 set_terminal_modes ();
3381 clear_current_matrices (f
);
3384 windows_or_buffers_changed
++;
3385 /* Mark all windows as inaccurate, so that every window will have
3386 its redisplay done. */
3387 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3388 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3394 /* Redraw frame F. This is nothing more than a call to the Lisp
3395 function redraw-frame. */
3402 XSETFRAME (frame
, f
);
3403 Fredraw_frame (frame
);
3407 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3408 doc
: /* Clear and redisplay all visible frames. */)
3411 Lisp_Object tail
, frame
;
3413 FOR_EACH_FRAME (tail
, frame
)
3414 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3415 Fredraw_frame (frame
);
3421 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3422 visible frames marked as garbaged. */
3425 redraw_garbaged_frames ()
3427 Lisp_Object tail
, frame
;
3429 FOR_EACH_FRAME (tail
, frame
)
3430 if (FRAME_VISIBLE_P (XFRAME (frame
))
3431 && FRAME_GARBAGED_P (XFRAME (frame
)))
3432 Fredraw_frame (frame
);
3437 /***********************************************************************
3439 ***********************************************************************/
3441 /* Try to update display and current glyph matrix directly.
3443 This function is called after a character G has been inserted into
3444 current_buffer. It tries to update the current glyph matrix and
3445 perform appropriate screen output to reflect the insertion. If it
3446 succeeds, the global flag redisplay_performed_directly_p will be
3447 set to 1, and thereby prevent the more costly general redisplay
3448 from running (see redisplay_internal).
3450 This function is not called for `hairy' character insertions.
3451 In particular, it is not called when after or before change
3452 functions exist, like they are used by font-lock. See keyboard.c
3453 for details where this function is called. */
3456 direct_output_for_insert (g
)
3459 register struct frame
*f
= SELECTED_FRAME ();
3460 struct window
*w
= XWINDOW (selected_window
);
3462 struct glyph_row
*glyph_row
;
3463 struct glyph
*glyphs
, *glyph
, *end
;
3465 /* Non-null means that redisplay of W is based on window matrices. */
3466 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3467 /* Non-null means we are in overwrite mode. */
3468 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3470 struct text_pos pos
;
3471 int delta
, delta_bytes
;
3473 /* Not done directly. */
3474 redisplay_performed_directly_p
= 0;
3476 /* Quickly give up for some common cases. */
3477 if (cursor_in_echo_area
3478 /* Give up if fonts have changed. */
3480 /* Give up if face attributes have been changed. */
3481 || face_change_count
3482 /* Give up if cursor position not really known. */
3483 || !display_completed
3484 /* Give up if buffer appears in two places. */
3485 || buffer_shared
> 1
3486 /* Give up if currently displaying a message instead of the
3487 minibuffer contents. */
3488 || (EQ (selected_window
, minibuf_window
)
3489 && EQ (minibuf_window
, echo_area_window
))
3490 /* Give up for hscrolled mini-buffer because display of the prompt
3491 is handled specially there (see display_line). */
3492 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3493 /* Give up if overwriting in the middle of a line. */
3496 && FETCH_BYTE (PT
) != '\n')
3497 /* Give up for tabs and line ends. */
3501 /* Give up if unable to display the cursor in the window. */
3502 || w
->cursor
.vpos
< 0
3503 /* Give up if we are showing a message or just cleared the message
3504 because we might need to resize the echo area window. */
3505 || !NILP (echo_area_buffer
[0])
3506 || !NILP (echo_area_buffer
[1])
3507 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3508 /* Can't do it in a continued line because continuation
3509 lines would change. */
3510 (glyph_row
->continued_p
3511 || glyph_row
->exact_window_width_line_p
3512 /* Can't use this method if the line overlaps others or is
3513 overlapped by others because these other lines would
3514 have to be redisplayed. */
3515 || glyph_row
->overlapping_p
3516 || glyph_row
->overlapped_p
))
3517 /* Can't do it for partial width windows on terminal frames
3518 because we can't clear to eol in such a window. */
3519 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3522 /* If we can't insert glyphs, we can use this method only
3523 at the end of a line. */
3524 if (!char_ins_del_ok
)
3525 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3528 /* Set up a display iterator structure for W. Glyphs will be
3529 produced in scratch_glyph_row. Current position is W's cursor
3531 clear_glyph_row (&scratch_glyph_row
);
3532 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3533 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3534 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3537 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3538 if (glyph_row
->mouse_face_p
)
3541 /* Give up if highlighting trailing whitespace and we have trailing
3542 whitespace in glyph_row. We would have to remove the trailing
3543 whitespace face in that case. */
3544 if (!NILP (Vshow_trailing_whitespace
)
3545 && glyph_row
->used
[TEXT_AREA
])
3549 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3550 if (last
->type
== STRETCH_GLYPH
3551 || (last
->type
== CHAR_GLYPH
3552 && last
->u
.ch
== ' '))
3556 /* Give up if there are overlay strings at pos. This would fail
3557 if the overlay string has newlines in it. */
3558 if (STRINGP (it
.string
))
3561 it
.hpos
= w
->cursor
.hpos
;
3562 it
.vpos
= w
->cursor
.vpos
;
3563 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3564 it
.current_y
= w
->cursor
.y
;
3565 it
.end_charpos
= PT
;
3566 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3567 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3569 /* More than one display element may be returned for PT - 1 if
3570 (i) it's a control character which is translated into `\003' or
3571 `^C', or (ii) it has a display table entry, or (iii) it's a
3572 combination of both. */
3573 delta
= delta_bytes
= 0;
3574 while (get_next_display_element (&it
))
3576 PRODUCE_GLYPHS (&it
);
3578 /* Give up if glyph doesn't fit completely on the line. */
3579 if (it
.current_x
>= it
.last_visible_x
)
3582 /* Give up if new glyph has different ascent or descent than
3583 the original row, or if it is not a character glyph. */
3584 if (glyph_row
->ascent
!= it
.ascent
3585 || glyph_row
->height
!= it
.ascent
+ it
.descent
3586 || glyph_row
->phys_ascent
!= it
.phys_ascent
3587 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3588 || it
.what
!= IT_CHARACTER
)
3592 delta_bytes
+= it
.len
;
3593 set_iterator_to_next (&it
, 1);
3596 /* Give up if we hit the right edge of the window. We would have
3597 to insert truncation or continuation glyphs. */
3598 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3599 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3602 /* Give up if there is a \t following in the line. */
3604 it2
.end_charpos
= ZV
;
3605 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3606 while (get_next_display_element (&it2
)
3607 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3611 set_iterator_to_next (&it2
, 1);
3614 /* Number of new glyphs produced. */
3615 n
= it
.glyph_row
->used
[TEXT_AREA
];
3617 /* Start and end of glyphs in original row. */
3618 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3619 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3621 /* Make room for new glyphs, then insert them. */
3622 xassert (end
- glyphs
- n
>= 0);
3623 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3624 (end
- glyphs
- n
) * sizeof (*end
));
3625 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3626 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3627 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3629 /* Compute new line width. */
3630 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3631 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3632 glyph_row
->pixel_width
= glyph_row
->x
;
3635 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3639 /* Increment buffer positions for glyphs following the newly
3641 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3642 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3643 glyph
->charpos
+= delta
;
3645 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3647 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3648 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3651 /* Adjust positions in lines following the one we are in. */
3652 increment_matrix_positions (w
->current_matrix
,
3654 w
->current_matrix
->nrows
,
3655 delta
, delta_bytes
);
3657 glyph_row
->contains_overlapping_glyphs_p
3658 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3660 glyph_row
->displays_text_p
= 1;
3661 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3662 XFASTINT (w
->window_end_vpos
)));
3664 if (!NILP (Vshow_trailing_whitespace
))
3665 highlight_trailing_whitespace (it
.f
, glyph_row
);
3667 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3668 In the middle, we have to insert glyphs. Note that this is now
3669 implemented for X frames. The implementation uses updated_window
3671 updated_row
= glyph_row
;
3672 updated_area
= TEXT_AREA
;
3676 rif
->update_window_begin_hook (w
);
3678 if (glyphs
== end
- n
3679 /* In front of a space added by append_space. */
3680 || (glyphs
== end
- n
- 1
3681 && (end
- n
)->charpos
<= 0))
3682 rif
->write_glyphs (glyphs
, n
);
3684 rif
->insert_glyphs (glyphs
, n
);
3688 if (glyphs
== end
- n
)
3689 write_glyphs (glyphs
, n
);
3691 insert_glyphs (glyphs
, n
);
3694 w
->cursor
.hpos
+= n
;
3695 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3696 xassert (w
->cursor
.hpos
>= 0
3697 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3699 /* How to set the cursor differs depending on whether we are
3700 using a frame matrix or a window matrix. Note that when
3701 a frame matrix is used, cursor_to expects frame coordinates,
3702 and the X and Y parameters are not used. */
3703 if (window_redisplay_p
)
3704 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3705 w
->cursor
.y
, w
->cursor
.x
);
3709 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3710 + (INTEGERP (w
->left_margin_cols
)
3711 ? XFASTINT (w
->left_margin_cols
)
3713 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3717 #ifdef HAVE_WINDOW_SYSTEM
3718 update_window_fringes (w
, 0);
3722 rif
->update_window_end_hook (w
, 1, 0);
3727 TRACE ((stderr
, "direct output for insert\n"));
3728 mark_window_display_accurate (it
.window
, 1);
3729 redisplay_performed_directly_p
= 1;
3734 /* Perform a direct display update for moving PT by N positions
3735 left or right. N < 0 means a movement backwards. This function
3736 is currently only called for N == 1 or N == -1. */
3739 direct_output_forward_char (n
)
3742 struct frame
*f
= SELECTED_FRAME ();
3743 struct window
*w
= XWINDOW (selected_window
);
3744 struct glyph_row
*row
;
3746 /* Give up if point moved out of or into a composition. */
3747 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3748 current_buffer
, PT
))
3751 /* Give up if face attributes have been changed. */
3752 if (face_change_count
)
3755 /* Give up if current matrix is not up to date or we are
3756 displaying a message. */
3757 if (!display_completed
|| cursor_in_echo_area
)
3760 /* Give up if the buffer's direction is reversed. */
3761 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3764 /* Can't use direct output if highlighting a region. */
3765 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3768 /* Can't use direct output if highlighting trailing whitespace. */
3769 if (!NILP (Vshow_trailing_whitespace
))
3772 /* Give up if we are showing a message or just cleared the message
3773 because we might need to resize the echo area window. */
3774 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3777 /* Give up if currently displaying a message instead of the
3778 minibuffer contents. */
3779 if (XWINDOW (minibuf_window
) == w
3780 && EQ (minibuf_window
, echo_area_window
))
3783 /* Give up if we don't know where the cursor is. */
3784 if (w
->cursor
.vpos
< 0)
3787 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3789 /* Give up if PT is outside of the last known cursor row. */
3790 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3791 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3794 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3796 w
->last_cursor
= w
->cursor
;
3797 XSETFASTINT (w
->last_point
, PT
);
3799 xassert (w
->cursor
.hpos
>= 0
3800 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3802 if (FRAME_WINDOW_P (f
))
3803 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3804 w
->cursor
.y
, w
->cursor
.x
);
3808 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3809 + (INTEGERP (w
->left_margin_cols
)
3810 ? XFASTINT (w
->left_margin_cols
)
3812 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3817 redisplay_performed_directly_p
= 1;
3823 /***********************************************************************
3825 ***********************************************************************/
3827 /* Update frame F based on the data in desired matrices.
3829 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3830 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3833 Value is non-zero if redisplay was stopped due to pending input. */
3836 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3839 int inhibit_hairy_id_p
;
3841 /* 1 means display has been paused because of pending input. */
3843 struct window
*root_window
= XWINDOW (f
->root_window
);
3845 #if PERIODIC_PREEMPTION_CHECKING
3846 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3849 double p
= XFLOATINT (Vredisplay_preemption_period
);
3852 if (detect_input_pending_ignore_squeezables ())
3859 usec
= (p
- sec
) * 1000000;
3861 EMACS_GET_TIME (tm
);
3862 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3863 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3867 if (FRAME_WINDOW_P (f
))
3869 /* We are working on window matrix basis. All windows whose
3870 flag must_be_updated_p is set have to be updated. */
3872 /* Record that we are not working on frame matrices. */
3873 set_frame_matrix_frame (NULL
);
3875 /* Update all windows in the window tree of F, maybe stopping
3876 when pending input is detected. */
3879 /* Update the menu bar on X frames that don't have toolkit
3881 if (WINDOWP (f
->menu_bar_window
))
3882 update_window (XWINDOW (f
->menu_bar_window
), 1);
3884 /* Update the tool-bar window, if present. */
3885 if (WINDOWP (f
->tool_bar_window
))
3887 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3889 /* Update tool-bar window. */
3890 if (w
->must_be_updated_p
)
3894 update_window (w
, 1);
3895 w
->must_be_updated_p
= 0;
3897 /* Swap tool-bar strings. We swap because we want to
3899 tem
= f
->current_tool_bar_string
;
3900 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3901 f
->desired_tool_bar_string
= tem
;
3906 /* Update windows. */
3907 paused_p
= update_window_tree (root_window
, force_p
);
3910 /* This flush is a performance bottleneck under X,
3911 and it doesn't seem to be necessary anyway (in general).
3912 It is necessary when resizing the window with the mouse, or
3913 at least the fringes are not redrawn in a timely manner. ++kfs */
3914 if (f
->force_flush_display_p
)
3916 rif
->flush_display (f
);
3917 f
->force_flush_display_p
= 0;
3922 /* We are working on frame matrix basis. Set the frame on whose
3923 frame matrix we operate. */
3924 set_frame_matrix_frame (f
);
3926 /* Build F's desired matrix from window matrices. */
3927 build_frame_matrix (f
);
3929 /* Update the display */
3931 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3935 fflush (termscript
);
3938 /* Check window matrices for lost pointers. */
3940 check_window_matrix_pointers (root_window
);
3941 add_frame_display_history (f
, paused_p
);
3946 /* Reset flags indicating that a window should be updated. */
3947 set_window_update_flags (root_window
, 0);
3949 display_completed
= !paused_p
;
3955 /************************************************************************
3956 Window-based updates
3957 ************************************************************************/
3959 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3960 don't stop updating when input is pending. */
3963 update_window_tree (w
, force_p
)
3969 while (w
&& !paused_p
)
3971 if (!NILP (w
->hchild
))
3972 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3973 else if (!NILP (w
->vchild
))
3974 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3975 else if (w
->must_be_updated_p
)
3976 paused_p
|= update_window (w
, force_p
);
3978 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3985 /* Update window W if its flag must_be_updated_p is non-zero. If
3986 FORCE_P is non-zero, don't stop updating if input is pending. */
3989 update_single_window (w
, force_p
)
3993 if (w
->must_be_updated_p
)
3995 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3997 /* Record that this is not a frame-based redisplay. */
3998 set_frame_matrix_frame (NULL
);
4000 #if PERIODIC_PREEMPTION_CHECKING
4001 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4004 double p
= XFLOATINT (Vredisplay_preemption_period
);
4008 usec
= (p
- sec
) * 1000000;
4010 EMACS_GET_TIME (tm
);
4011 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4012 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4018 update_window (w
, force_p
);
4021 /* Reset flag in W. */
4022 w
->must_be_updated_p
= 0;
4026 #ifdef HAVE_WINDOW_SYSTEM
4028 /* Redraw lines from the current matrix of window W that are
4029 overlapped by other rows. YB is bottom-most y-position in W. */
4032 redraw_overlapped_rows (w
, yb
)
4038 /* If rows overlapping others have been changed, the rows being
4039 overlapped have to be redrawn. This won't draw lines that have
4040 already been drawn in update_window_line because overlapped_p in
4041 desired rows is 0, so after row assignment overlapped_p in
4042 current rows is 0. */
4043 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4045 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4047 if (!row
->enabled_p
)
4049 else if (row
->mode_line_p
)
4052 if (row
->overlapped_p
)
4054 enum glyph_row_area area
;
4056 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4059 updated_area
= area
;
4060 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
4061 if (row
->used
[area
])
4062 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
4063 rif
->clear_end_of_line (-1);
4066 row
->overlapped_p
= 0;
4069 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4075 /* Redraw lines from the current matrix of window W that overlap
4076 others. YB is bottom-most y-position in W. */
4079 redraw_overlapping_rows (w
, yb
)
4084 struct glyph_row
*row
;
4086 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4088 row
= w
->current_matrix
->rows
+ i
;
4090 if (!row
->enabled_p
)
4092 else if (row
->mode_line_p
)
4095 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4097 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4101 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4102 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4103 overlaps
|= OVERLAPS_PRED
;
4104 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4105 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4106 overlaps
|= OVERLAPS_SUCC
;
4110 if (row
->used
[LEFT_MARGIN_AREA
])
4111 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4113 if (row
->used
[TEXT_AREA
])
4114 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4116 if (row
->used
[RIGHT_MARGIN_AREA
])
4117 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4119 /* Record in neighbour rows that ROW overwrites part of
4121 if (overlaps
& OVERLAPS_PRED
)
4122 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4123 if (overlaps
& OVERLAPS_SUCC
)
4124 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4133 #endif /* HAVE_WINDOW_SYSTEM */
4138 /* Check that no row in the current matrix of window W is enabled
4139 which is below what's displayed in the window. */
4142 check_current_matrix_flags (w
)
4145 int last_seen_p
= 0;
4146 int i
, yb
= window_text_bottom_y (w
);
4148 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4150 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4151 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4153 else if (last_seen_p
&& row
->enabled_p
)
4158 #endif /* GLYPH_DEBUG */
4161 /* Update display of window W. FORCE_P non-zero means that we should
4162 not stop when detecting pending input. */
4165 update_window (w
, force_p
)
4169 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4171 #if !PERIODIC_PREEMPTION_CHECKING
4172 int preempt_count
= baud_rate
/ 2400 + 1;
4174 extern int input_pending
;
4175 extern Lisp_Object do_mouse_tracking
;
4177 /* Check that W's frame doesn't have glyph matrices. */
4178 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4179 xassert (updating_frame
!= NULL
);
4182 /* Check pending input the first time so that we can quickly return. */
4183 if (redisplay_dont_pause
)
4185 #if PERIODIC_PREEMPTION_CHECKING
4186 else if (NILP (Vredisplay_preemption_period
))
4190 detect_input_pending_ignore_squeezables ();
4193 /* If forced to complete the update, or if no input is pending, do
4195 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4197 struct glyph_row
*row
, *end
;
4198 struct glyph_row
*mode_line_row
;
4199 struct glyph_row
*header_line_row
;
4200 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4202 rif
->update_window_begin_hook (w
);
4203 yb
= window_text_bottom_y (w
);
4205 /* If window has a header line, update it before everything else.
4206 Adjust y-positions of other rows by the header line height. */
4207 row
= desired_matrix
->rows
;
4208 end
= row
+ desired_matrix
->nrows
- 1;
4210 if (row
->mode_line_p
)
4212 header_line_row
= row
;
4216 header_line_row
= NULL
;
4218 /* Update the mode line, if necessary. */
4219 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4220 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4222 mode_line_row
->y
= yb
;
4223 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4225 &mouse_face_overwritten_p
);
4228 /* Find first enabled row. Optimizations in redisplay_internal
4229 may lead to an update with only one row enabled. There may
4230 be also completely empty matrices. */
4231 while (row
< end
&& !row
->enabled_p
)
4234 /* Try reusing part of the display by copying. */
4235 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4237 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4240 /* All rows were found to be equal. */
4246 /* We've scrolled the display. */
4252 /* Update the rest of the lines. */
4253 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4256 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4259 /* We'll have to play a little bit with when to
4260 detect_input_pending. If it's done too often,
4261 scrolling large windows with repeated scroll-up
4262 commands will too quickly pause redisplay. */
4263 #if PERIODIC_PREEMPTION_CHECKING
4267 EMACS_GET_TIME (tm
);
4268 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4269 if (EMACS_TIME_NEG_P (dif
))
4271 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4272 if (detect_input_pending_ignore_squeezables ())
4277 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4278 detect_input_pending_ignore_squeezables ();
4280 changed_p
|= update_window_line (w
, vpos
,
4281 &mouse_face_overwritten_p
);
4283 /* Mark all rows below the last visible one in the current
4284 matrix as invalid. This is necessary because of
4285 variable line heights. Consider the case of three
4286 successive redisplays, where the first displays 5
4287 lines, the second 3 lines, and the third 5 lines again.
4288 If the second redisplay wouldn't mark rows in the
4289 current matrix invalid, the third redisplay might be
4290 tempted to optimize redisplay based on lines displayed
4291 in the first redisplay. */
4292 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4293 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4294 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4297 /* Was display preempted? */
4298 paused_p
= row
< end
;
4302 /* Update the header line after scrolling because a new header
4303 line would otherwise overwrite lines at the top of the window
4304 that can be scrolled. */
4305 if (header_line_row
&& header_line_row
->enabled_p
)
4307 header_line_row
->y
= 0;
4308 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4311 /* Fix the appearance of overlapping/overlapped rows. */
4312 if (!paused_p
&& !w
->pseudo_window_p
)
4314 #ifdef HAVE_WINDOW_SYSTEM
4315 if (changed_p
&& rif
->fix_overlapping_area
)
4317 redraw_overlapped_rows (w
, yb
);
4318 redraw_overlapping_rows (w
, yb
);
4322 /* Make cursor visible at cursor position of W. */
4323 set_window_cursor_after_update (w
);
4325 #if 0 /* Check that current matrix invariants are satisfied. This is
4326 for debugging only. See the comment of check_matrix_invariants. */
4327 IF_DEBUG (check_matrix_invariants (w
));
4332 /* Remember the redisplay method used to display the matrix. */
4333 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4336 #ifdef HAVE_WINDOW_SYSTEM
4337 update_window_fringes (w
, 0);
4340 /* End the update of window W. Don't set the cursor if we
4341 paused updating the display because in this case,
4342 set_window_cursor_after_update hasn't been called, and
4343 output_cursor doesn't contain the cursor location. */
4344 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4350 /* check_current_matrix_flags (w); */
4351 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4354 clear_glyph_matrix (desired_matrix
);
4360 /* Update the display of area AREA in window W, row number VPOS.
4361 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4364 update_marginal_area (w
, area
, vpos
)
4368 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4370 /* Let functions in xterm.c know what area subsequent X positions
4371 will be relative to. */
4372 updated_area
= area
;
4374 /* Set cursor to start of glyphs, write them, and clear to the end
4375 of the area. I don't think that something more sophisticated is
4376 necessary here, since marginal areas will not be the default. */
4377 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4378 if (desired_row
->used
[area
])
4379 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4380 rif
->clear_end_of_line (-1);
4384 /* Update the display of the text area of row VPOS in window W.
4385 Value is non-zero if display has changed. */
4388 update_text_area (w
, vpos
)
4392 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4393 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4396 /* Let functions in xterm.c know what area subsequent X positions
4397 will be relative to. */
4398 updated_area
= TEXT_AREA
;
4400 /* If rows are at different X or Y, or rows have different height,
4401 or the current row is marked invalid, write the entire line. */
4402 if (!current_row
->enabled_p
4403 || desired_row
->y
!= current_row
->y
4404 || desired_row
->ascent
!= current_row
->ascent
4405 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4406 || desired_row
->phys_height
!= current_row
->phys_height
4407 || desired_row
->visible_height
!= current_row
->visible_height
4408 || current_row
->overlapped_p
4410 /* This causes excessive flickering when mouse is moved across
4411 the mode line. Luckily everything seems to work just fine
4412 without doing this. KFS 2006-09-17. */
4413 || current_row
->mouse_face_p
4415 || current_row
->x
!= desired_row
->x
)
4417 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4419 if (desired_row
->used
[TEXT_AREA
])
4420 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4421 desired_row
->used
[TEXT_AREA
]);
4423 /* Clear to end of window. */
4424 rif
->clear_end_of_line (-1);
4427 /* This erases the cursor. We do this here because
4428 notice_overwritten_cursor cannot easily check this, which
4429 might indicate that the whole functionality of
4430 notice_overwritten_cursor would better be implemented here.
4431 On the other hand, we need notice_overwritten_cursor as long
4432 as mouse highlighting is done asynchronously outside of
4434 if (vpos
== w
->phys_cursor
.vpos
)
4435 w
->phys_cursor_on_p
= 0;
4440 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4441 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4442 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4443 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4445 /* If the desired row extends its face to the text area end, and
4446 unless the current row also does so at the same position,
4447 make sure we write at least one glyph, so that the face
4448 extension actually takes place. */
4449 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4450 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4451 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4452 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4455 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4459 /* Loop over glyphs that current and desired row may have
4465 /* Skip over glyphs that both rows have in common. These
4466 don't have to be written. We can't skip if the last
4467 current glyph overlaps the glyph to its right. For
4468 example, consider a current row of `if ' with the `f' in
4469 Courier bold so that it overlaps the ` ' to its right.
4470 If the desired row is ` ', we would skip over the space
4471 after the `if' and there would remain a pixel from the
4472 `f' on the screen. */
4473 if (overlapping_glyphs_p
&& i
> 0)
4475 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4478 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4480 can_skip_p
= right
== 0;
4486 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4488 x
+= desired_glyph
->pixel_width
;
4489 ++desired_glyph
, ++current_glyph
, ++i
;
4492 /* Consider the case that the current row contains "xxx
4493 ppp ggg" in italic Courier font, and the desired row
4494 is "xxx ggg". The character `p' has lbearing, `g'
4495 has not. The loop above will stop in front of the
4496 first `p' in the current row. If we would start
4497 writing glyphs there, we wouldn't erase the lbearing
4498 of the `p'. The rest of the lbearing problem is then
4499 taken care of by draw_glyphs. */
4500 if (overlapping_glyphs_p
4502 && i
< current_row
->used
[TEXT_AREA
]
4503 && (current_row
->used
[TEXT_AREA
]
4504 != desired_row
->used
[TEXT_AREA
]))
4508 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4510 while (left
> 0 && i
> 0)
4512 --i
, --desired_glyph
, --current_glyph
;
4513 x
-= desired_glyph
->pixel_width
;
4514 left
-= desired_glyph
->pixel_width
;
4519 /* Try to avoid writing the entire rest of the desired row
4520 by looking for a resync point. This mainly prevents
4521 mode line flickering in the case the mode line is in
4522 fixed-pitch font, which it usually will be. */
4523 if (i
< desired_row
->used
[TEXT_AREA
])
4525 int start_x
= x
, start_hpos
= i
;
4526 struct glyph
*start
= desired_glyph
;
4528 int skip_first_p
= !can_skip_p
;
4530 /* Find the next glyph that's equal again. */
4533 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4536 x
+= desired_glyph
->pixel_width
;
4537 current_x
+= current_glyph
->pixel_width
;
4538 ++desired_glyph
, ++current_glyph
, ++i
;
4542 if (i
== start_hpos
|| x
!= current_x
)
4546 desired_glyph
= start
;
4550 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4551 rif
->write_glyphs (start
, i
- start_hpos
);
4556 /* Write the rest. */
4557 if (i
< desired_row
->used
[TEXT_AREA
])
4559 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4560 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4564 /* Maybe clear to end of line. */
4565 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4567 /* If new row extends to the end of the text area, nothing
4568 has to be cleared, if and only if we did a write_glyphs
4569 above. This is made sure by setting desired_stop_pos
4570 appropriately above. */
4571 xassert (i
< desired_row
->used
[TEXT_AREA
]
4572 || ((desired_row
->used
[TEXT_AREA
]
4573 == current_row
->used
[TEXT_AREA
])
4574 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4576 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4578 /* If old row extends to the end of the text area, clear. */
4579 if (i
>= desired_row
->used
[TEXT_AREA
])
4580 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4581 desired_row
->pixel_width
);
4582 rif
->clear_end_of_line (-1);
4585 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4587 /* Otherwise clear to the end of the old row. Everything
4588 after that position should be clear already. */
4591 if (i
>= desired_row
->used
[TEXT_AREA
])
4592 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4593 desired_row
->pixel_width
);
4595 /* If cursor is displayed at the end of the line, make sure
4596 it's cleared. Nowadays we don't have a phys_cursor_glyph
4597 with which to erase the cursor (because this method
4598 doesn't work with lbearing/rbearing), so we must do it
4600 if (vpos
== w
->phys_cursor
.vpos
4601 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4603 w
->phys_cursor_on_p
= 0;
4607 x
= current_row
->pixel_width
;
4608 rif
->clear_end_of_line (x
);
4617 /* Update row VPOS in window W. Value is non-zero if display has been
4621 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4623 int vpos
, *mouse_face_overwritten_p
;
4625 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4626 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4629 /* Set the row being updated. This is important to let xterm.c
4630 know what line height values are in effect. */
4631 updated_row
= desired_row
;
4633 /* A row can be completely invisible in case a desired matrix was
4634 built with a vscroll and then make_cursor_line_fully_visible shifts
4635 the matrix. Make sure to make such rows current anyway, since
4636 we need the correct y-position, for example, in the current matrix. */
4637 if (desired_row
->mode_line_p
4638 || desired_row
->visible_height
> 0)
4640 xassert (desired_row
->enabled_p
);
4642 /* Update display of the left margin area, if there is one. */
4643 if (!desired_row
->full_width_p
4644 && !NILP (w
->left_margin_cols
))
4647 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4650 /* Update the display of the text area. */
4651 if (update_text_area (w
, vpos
))
4654 if (current_row
->mouse_face_p
)
4655 *mouse_face_overwritten_p
= 1;
4658 /* Update display of the right margin area, if there is one. */
4659 if (!desired_row
->full_width_p
4660 && !NILP (w
->right_margin_cols
))
4663 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4666 /* Draw truncation marks etc. */
4667 if (!current_row
->enabled_p
4668 || desired_row
->y
!= current_row
->y
4669 || desired_row
->visible_height
!= current_row
->visible_height
4670 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4671 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4672 || current_row
->redraw_fringe_bitmaps_p
4673 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4674 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4675 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4676 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4677 rif
->after_update_window_line_hook (desired_row
);
4680 /* Update current_row from desired_row. */
4681 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4687 /* Set the cursor after an update of window W. This function may only
4688 be called from update_window. */
4691 set_window_cursor_after_update (w
)
4694 struct frame
*f
= XFRAME (w
->frame
);
4695 int cx
, cy
, vpos
, hpos
;
4697 /* Not intended for frame matrix updates. */
4698 xassert (FRAME_WINDOW_P (f
));
4700 if (cursor_in_echo_area
4701 && !NILP (echo_area_buffer
[0])
4702 /* If we are showing a message instead of the mini-buffer,
4703 show the cursor for the message instead. */
4704 && XWINDOW (minibuf_window
) == w
4705 && EQ (minibuf_window
, echo_area_window
)
4706 /* These cases apply only to the frame that contains
4707 the active mini-buffer window. */
4708 && FRAME_HAS_MINIBUF_P (f
)
4709 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4711 cx
= cy
= vpos
= hpos
= 0;
4713 if (cursor_in_echo_area
>= 0)
4715 /* If the mini-buffer is several lines high, find the last
4716 line that has any text on it. Note: either all lines
4717 are enabled or none. Otherwise we wouldn't be able to
4719 struct glyph_row
*row
, *last_row
;
4720 struct glyph
*glyph
;
4721 int yb
= window_text_bottom_y (w
);
4724 row
= w
->current_matrix
->rows
;
4725 while (row
->enabled_p
4726 && (last_row
== NULL
4727 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4729 if (row
->used
[TEXT_AREA
]
4730 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4737 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4738 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4740 while (last
> start
&& last
->charpos
< 0)
4743 for (glyph
= start
; glyph
< last
; ++glyph
)
4745 cx
+= glyph
->pixel_width
;
4750 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4758 hpos
= w
->cursor
.hpos
;
4759 vpos
= w
->cursor
.vpos
;
4762 /* Window cursor can be out of sync for horizontally split windows. */
4763 hpos
= max (0, hpos
);
4764 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4765 vpos
= max (0, vpos
);
4766 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4767 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4771 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4772 tree rooted at W. */
4775 set_window_update_flags (w
, on_p
)
4781 if (!NILP (w
->hchild
))
4782 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4783 else if (!NILP (w
->vchild
))
4784 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4786 w
->must_be_updated_p
= on_p
;
4788 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4794 /***********************************************************************
4795 Window-Based Scrolling
4796 ***********************************************************************/
4798 /* Structure describing rows in scrolling_window. */
4802 /* Number of occurrences of this row in desired and current matrix. */
4803 int old_uses
, new_uses
;
4805 /* Vpos of row in new matrix. */
4806 int new_line_number
;
4808 /* Bucket index of this row_entry in the hash table row_table. */
4811 /* The row described by this entry. */
4812 struct glyph_row
*row
;
4814 /* Hash collision chain. */
4815 struct row_entry
*next
;
4818 /* A pool to allocate row_entry structures from, and the size of the
4819 pool. The pool is reallocated in scrolling_window when we find
4820 that we need a larger one. */
4822 static struct row_entry
*row_entry_pool
;
4823 static int row_entry_pool_size
;
4825 /* Index of next free entry in row_entry_pool. */
4827 static int row_entry_idx
;
4829 /* The hash table used during scrolling, and the table's size. This
4830 table is used to quickly identify equal rows in the desired and
4833 static struct row_entry
**row_table
;
4834 static int row_table_size
;
4836 /* Vectors of pointers to row_entry structures belonging to the
4837 current and desired matrix, and the size of the vectors. */
4839 static struct row_entry
**old_lines
, **new_lines
;
4840 static int old_lines_size
, new_lines_size
;
4842 /* A pool to allocate run structures from, and its size. */
4844 static struct run
*run_pool
;
4845 static int runs_size
;
4847 /* A vector of runs of lines found during scrolling. */
4849 static struct run
**runs
;
4851 /* Add glyph row ROW to the scrolling hash table during the scrolling
4854 static INLINE
struct row_entry
*
4855 add_row_entry (w
, row
)
4857 struct glyph_row
*row
;
4859 struct row_entry
*entry
;
4860 int i
= row
->hash
% row_table_size
;
4862 entry
= row_table
[i
];
4863 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4864 entry
= entry
->next
;
4868 entry
= row_entry_pool
+ row_entry_idx
++;
4870 entry
->old_uses
= entry
->new_uses
= 0;
4871 entry
->new_line_number
= 0;
4873 entry
->next
= row_table
[i
];
4874 row_table
[i
] = entry
;
4881 /* Try to reuse part of the current display of W by scrolling lines.
4882 HEADER_LINE_P non-zero means W has a header line.
4884 The algorithm is taken from Communications of the ACM, Apr78 "A
4885 Technique for Isolating Differences Between Files." It should take
4888 A short outline of the steps of the algorithm
4890 1. Skip lines equal at the start and end of both matrices.
4892 2. Enter rows in the current and desired matrix into a symbol
4893 table, counting how often they appear in both matrices.
4895 3. Rows that appear exactly once in both matrices serve as anchors,
4896 i.e. we assume that such lines are likely to have been moved.
4898 4. Starting from anchor lines, extend regions to be scrolled both
4899 forward and backward.
4903 -1 if all rows were found to be equal.
4904 0 to indicate that we did not scroll the display, or
4905 1 if we did scroll. */
4908 scrolling_window (w
, header_line_p
)
4912 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4913 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4914 int yb
= window_text_bottom_y (w
);
4915 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4916 int nruns
, nbytes
, n
, run_idx
;
4917 struct row_entry
*entry
;
4919 /* Skip over rows equal at the start. */
4920 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4922 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4923 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4927 && !d
->redraw_fringe_bitmaps_p
4929 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4930 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4931 && row_equal_p (w
, c
, d
, 1))
4940 /* Give up if some rows in the desired matrix are not enabled. */
4941 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4944 first_old
= first_new
= i
;
4946 /* Set last_new to the index + 1 of the last enabled row in the
4949 while (i
< desired_matrix
->nrows
- 1
4950 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4951 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4954 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4959 /* Set last_old to the index + 1 of the last enabled row in the
4960 current matrix. We don't look at the enabled flag here because
4961 we plan to reuse part of the display even if other parts are
4964 while (i
< current_matrix
->nrows
- 1)
4966 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4975 /* Skip over rows equal at the bottom. */
4978 while (i
- 1 > first_new
4979 && j
- 1 > first_old
4980 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4981 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4982 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4983 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4985 MATRIX_ROW (desired_matrix
, i
- 1),
4986 MATRIX_ROW (current_matrix
, j
- 1), 1))
4991 /* Nothing to do if all rows are equal. */
4992 if (last_new
== first_new
)
4995 /* Reallocate vectors, tables etc. if necessary. */
4997 if (current_matrix
->nrows
> old_lines_size
)
4999 old_lines_size
= current_matrix
->nrows
;
5000 nbytes
= old_lines_size
* sizeof *old_lines
;
5001 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5004 if (desired_matrix
->nrows
> new_lines_size
)
5006 new_lines_size
= desired_matrix
->nrows
;
5007 nbytes
= new_lines_size
* sizeof *new_lines
;
5008 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5011 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5012 if (3 * n
> row_table_size
)
5014 row_table_size
= next_almost_prime (3 * n
);
5015 nbytes
= row_table_size
* sizeof *row_table
;
5016 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5017 bzero (row_table
, nbytes
);
5020 if (n
> row_entry_pool_size
)
5022 row_entry_pool_size
= n
;
5023 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5024 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5027 if (desired_matrix
->nrows
> runs_size
)
5029 runs_size
= desired_matrix
->nrows
;
5030 nbytes
= runs_size
* sizeof *runs
;
5031 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5032 nbytes
= runs_size
* sizeof *run_pool
;
5033 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5036 nruns
= run_idx
= 0;
5039 /* Add rows from the current and desired matrix to the hash table
5040 row_hash_table to be able to find equal ones quickly. */
5042 for (i
= first_old
; i
< last_old
; ++i
)
5044 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5046 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5047 old_lines
[i
] = entry
;
5051 old_lines
[i
] = NULL
;
5054 for (i
= first_new
; i
< last_new
; ++i
)
5056 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5057 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5059 entry
->new_line_number
= i
;
5060 new_lines
[i
] = entry
;
5063 /* Identify moves based on lines that are unique and equal
5064 in both matrices. */
5065 for (i
= first_old
; i
< last_old
;)
5067 && old_lines
[i
]->old_uses
== 1
5068 && old_lines
[i
]->new_uses
== 1)
5071 int new_line
= old_lines
[i
]->new_line_number
;
5072 struct run
*run
= run_pool
+ run_idx
++;
5075 run
->current_vpos
= i
;
5076 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5077 run
->desired_vpos
= new_line
;
5078 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5080 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5082 /* Extend backward. */
5085 while (j
> first_old
5087 && old_lines
[j
] == new_lines
[k
])
5089 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5090 --run
->current_vpos
;
5091 --run
->desired_vpos
;
5094 run
->desired_y
-= h
;
5095 run
->current_y
-= h
;
5099 /* Extend forward. */
5104 && old_lines
[j
] == new_lines
[k
])
5106 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5112 /* Insert run into list of all runs. Order runs by copied
5113 pixel lines. Note that we record runs that don't have to
5114 be copied because they are already in place. This is done
5115 because we can avoid calling update_window_line in this
5117 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5119 for (k
= nruns
; k
> j
; --k
)
5120 runs
[k
] = runs
[k
- 1];
5129 /* Do the moves. Do it in a way that we don't overwrite something
5130 we want to copy later on. This is not solvable in general
5131 because there is only one display and we don't have a way to
5132 exchange areas on this display. Example:
5134 +-----------+ +-----------+
5136 +-----------+ --> +-----------+
5138 +-----------+ +-----------+
5140 Instead, prefer bigger moves, and invalidate moves that would
5141 copy from where we copied to. */
5143 for (i
= 0; i
< nruns
; ++i
)
5144 if (runs
[i
]->nrows
> 0)
5146 struct run
*r
= runs
[i
];
5148 /* Copy on the display. */
5149 if (r
->current_y
!= r
->desired_y
)
5151 rif
->scroll_run_hook (w
, r
);
5153 /* Invalidate runs that copy from where we copied to. */
5154 for (j
= i
+ 1; j
< nruns
; ++j
)
5156 struct run
*p
= runs
[j
];
5158 if ((p
->current_y
>= r
->desired_y
5159 && p
->current_y
< r
->desired_y
+ r
->height
)
5160 || (p
->current_y
+ p
->height
>= r
->desired_y
5161 && (p
->current_y
+ p
->height
5162 < r
->desired_y
+ r
->height
)))
5167 /* Assign matrix rows. */
5168 for (j
= 0; j
< r
->nrows
; ++j
)
5170 struct glyph_row
*from
, *to
;
5171 int to_overlapped_p
;
5173 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5174 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5175 to_overlapped_p
= to
->overlapped_p
;
5176 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5177 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5178 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5179 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5180 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5181 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5182 from
->redraw_fringe_bitmaps_p
= 1;
5183 assign_row (to
, from
);
5184 to
->enabled_p
= 1, from
->enabled_p
= 0;
5185 to
->overlapped_p
= to_overlapped_p
;
5189 /* Clear the hash table, for the next time. */
5190 for (i
= 0; i
< row_entry_idx
; ++i
)
5191 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5193 /* Value is > 0 to indicate that we scrolled the display. */
5199 /************************************************************************
5201 ************************************************************************/
5203 /* Update the desired frame matrix of frame F.
5205 FORCE_P non-zero means that the update should not be stopped by
5206 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5207 should not be tried.
5209 Value is non-zero if update was stopped due to pending input. */
5212 update_frame_1 (f
, force_p
, inhibit_id_p
)
5217 /* Frame matrices to work on. */
5218 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5219 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5222 int preempt_count
= baud_rate
/ 2400 + 1;
5223 extern int input_pending
;
5225 xassert (current_matrix
&& desired_matrix
);
5227 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5228 calculate_costs (f
);
5230 if (preempt_count
<= 0)
5233 if (redisplay_dont_pause
)
5235 #if PERIODIC_PREEMPTION_CHECKING
5236 else if (NILP (Vredisplay_preemption_period
))
5239 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5246 /* If we cannot insert/delete lines, it's no use trying it. */
5247 if (!line_ins_del_ok
)
5250 /* See if any of the desired lines are enabled; don't compute for
5251 i/d line if just want cursor motion. */
5252 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5253 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5256 /* Try doing i/d line, if not yet inhibited. */
5257 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5258 force_p
|= scrolling (f
);
5260 /* Update the individual lines as needed. Do bottom line first. */
5261 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5262 update_frame_line (f
, desired_matrix
->nrows
- 1);
5264 /* Now update the rest of the lines. */
5265 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5267 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5269 if (FRAME_TERMCAP_P (f
))
5271 /* Flush out every so many lines.
5272 Also flush out if likely to have more than 1k buffered
5273 otherwise. I'm told that some telnet connections get
5274 really screwed by more than 1k output at once. */
5275 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5277 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5280 if (preempt_count
== 1)
5282 #ifdef EMACS_OUTQSIZE
5283 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5284 /* Probably not a tty. Ignore the error and reset
5286 outq
= PENDING_OUTPUT_COUNT (stdout
);
5289 if (baud_rate
<= outq
&& baud_rate
> 0)
5290 sleep (outq
/ baud_rate
);
5295 #if PERIODIC_PREEMPTION_CHECKING
5299 EMACS_GET_TIME (tm
);
5300 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5301 if (EMACS_TIME_NEG_P (dif
))
5303 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5304 if (detect_input_pending_ignore_squeezables ())
5309 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5310 detect_input_pending_ignore_squeezables ();
5313 update_frame_line (f
, i
);
5317 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5319 /* Now just clean up termcap drivers and set cursor, etc. */
5322 if ((cursor_in_echo_area
5323 /* If we are showing a message instead of the mini-buffer,
5324 show the cursor for the message instead of for the
5325 (now hidden) mini-buffer contents. */
5326 || (EQ (minibuf_window
, selected_window
)
5327 && EQ (minibuf_window
, echo_area_window
)
5328 && !NILP (echo_area_buffer
[0])))
5329 /* These cases apply only to the frame that contains
5330 the active mini-buffer window. */
5331 && FRAME_HAS_MINIBUF_P (f
)
5332 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5334 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5337 if (cursor_in_echo_area
< 0)
5339 /* Negative value of cursor_in_echo_area means put
5340 cursor at beginning of line. */
5346 /* Positive value of cursor_in_echo_area means put
5347 cursor at the end of the prompt. If the mini-buffer
5348 is several lines high, find the last line that has
5350 row
= FRAME_LINES (f
);
5356 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5358 /* Frame rows are filled up with spaces that
5359 must be ignored here. */
5360 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5362 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5363 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5366 && (last
- 1)->charpos
< 0)
5372 while (row
> top
&& col
== 0);
5374 /* Make sure COL is not out of range. */
5375 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5377 /* If we have another row, advance cursor into it. */
5378 if (row
< FRAME_LINES (f
) - 1)
5380 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5383 /* Otherwise move it back in range. */
5385 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5389 cursor_to (row
, col
);
5393 /* We have only one cursor on terminal frames. Use it to
5394 display the cursor of the selected window. */
5395 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5396 if (w
->cursor
.vpos
>= 0
5397 /* The cursor vpos may be temporarily out of bounds
5398 in the following situation: There is one window,
5399 with the cursor in the lower half of it. The window
5400 is split, and a message causes a redisplay before
5401 a new cursor position has been computed. */
5402 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5404 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5405 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5407 if (INTEGERP (w
->left_margin_cols
))
5408 x
+= XFASTINT (w
->left_margin_cols
);
5410 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5418 clear_desired_matrices (f
);
5423 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5427 struct frame
*frame
;
5429 int unchanged_at_top
, unchanged_at_bottom
;
5432 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5433 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5434 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5435 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5437 int free_at_end_vpos
= FRAME_LINES (frame
);
5438 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5439 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5441 if (!current_matrix
)
5444 /* Compute hash codes of all the lines. Also calculate number of
5445 changed lines, number of unchanged lines at the beginning, and
5446 number of unchanged lines at the end. */
5448 unchanged_at_top
= 0;
5449 unchanged_at_bottom
= FRAME_LINES (frame
);
5450 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5452 /* Give up on this scrolling if some old lines are not enabled. */
5453 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5455 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5456 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5458 /* This line cannot be redrawn, so don't let scrolling mess it. */
5459 new_hash
[i
] = old_hash
[i
];
5460 #define INFINITY 1000000 /* Taken from scroll.c */
5461 draw_cost
[i
] = INFINITY
;
5465 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5466 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5469 if (old_hash
[i
] != new_hash
[i
])
5472 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5474 else if (i
== unchanged_at_top
)
5476 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5479 /* If changed lines are few, don't allow preemption, don't scroll. */
5480 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5481 || unchanged_at_bottom
== FRAME_LINES (frame
))
5484 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5485 - unchanged_at_bottom
);
5487 if (scroll_region_ok
)
5488 free_at_end_vpos
-= unchanged_at_bottom
;
5489 else if (memory_below_frame
)
5490 free_at_end_vpos
= -1;
5492 /* If large window, fast terminal and few lines in common between
5493 current frame and desired frame, don't bother with i/d calc. */
5494 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5496 10 * scrolling_max_lines_saved (unchanged_at_top
,
5497 FRAME_LINES (frame
) - unchanged_at_bottom
,
5498 old_hash
, new_hash
, draw_cost
)))
5501 if (window_size
< 2)
5504 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5505 draw_cost
+ unchanged_at_top
- 1,
5506 old_draw_cost
+ unchanged_at_top
- 1,
5507 old_hash
+ unchanged_at_top
- 1,
5508 new_hash
+ unchanged_at_top
- 1,
5509 free_at_end_vpos
- unchanged_at_top
);
5515 /* Count the number of blanks at the start of the vector of glyphs R
5516 which is LEN glyphs long. */
5519 count_blanks (r
, len
)
5525 for (i
= 0; i
< len
; ++i
)
5526 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5533 /* Count the number of glyphs in common at the start of the glyph
5534 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5535 of STR2. Value is the number of equal glyphs equal at the start. */
5538 count_match (str1
, end1
, str2
, end2
)
5539 struct glyph
*str1
, *end1
, *str2
, *end2
;
5541 struct glyph
*p1
= str1
;
5542 struct glyph
*p2
= str2
;
5546 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5553 /* Char insertion/deletion cost vector, from term.c */
5555 extern int *char_ins_del_vector
;
5556 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5559 /* Perform a frame-based update on line VPOS in frame FRAME. */
5562 update_frame_line (f
, vpos
)
5566 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5568 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5569 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5570 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5571 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5572 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5573 int must_write_whole_line_p
;
5574 int write_spaces_p
= must_write_spaces
;
5575 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5576 != FACE_TTY_DEFAULT_BG_COLOR
);
5578 if (colored_spaces_p
)
5581 /* Current row not enabled means it has unknown contents. We must
5582 write the whole desired line in that case. */
5583 must_write_whole_line_p
= !current_row
->enabled_p
;
5584 if (must_write_whole_line_p
)
5591 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5592 olen
= current_row
->used
[TEXT_AREA
];
5594 /* Ignore trailing spaces, if we can. */
5595 if (!write_spaces_p
)
5596 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5600 current_row
->enabled_p
= 1;
5601 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5603 /* If desired line is empty, just clear the line. */
5604 if (!desired_row
->enabled_p
)
5610 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5611 nlen
= desired_row
->used
[TEXT_AREA
];
5612 nend
= nbody
+ nlen
;
5614 /* If display line has unknown contents, write the whole line. */
5615 if (must_write_whole_line_p
)
5617 /* Ignore spaces at the end, if we can. */
5618 if (!write_spaces_p
)
5619 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5622 /* Write the contents of the desired line. */
5625 cursor_to (vpos
, 0);
5626 write_glyphs (nbody
, nlen
);
5629 /* Don't call clear_end_of_line if we already wrote the whole
5630 line. The cursor will not be at the right margin in that
5631 case but in the line below. */
5632 if (nlen
< FRAME_TOTAL_COLS (f
))
5634 cursor_to (vpos
, nlen
);
5635 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5638 /* Make sure we are in the right row, otherwise cursor movement
5639 with cmgoto might use `ch' in the wrong row. */
5640 cursor_to (vpos
, 0);
5642 make_current (desired_matrix
, current_matrix
, vpos
);
5646 /* Pretend trailing spaces are not there at all,
5647 unless for one reason or another we must write all spaces. */
5648 if (!write_spaces_p
)
5649 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5652 /* If there's no i/d char, quickly do the best we can without it. */
5653 if (!char_ins_del_ok
)
5657 /* Find the first glyph in desired row that doesn't agree with
5658 a glyph in the current row, and write the rest from there on. */
5659 for (i
= 0; i
< nlen
; i
++)
5661 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5663 /* Find the end of the run of different glyphs. */
5667 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5668 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5671 /* Output this run of non-matching chars. */
5672 cursor_to (vpos
, i
);
5673 write_glyphs (nbody
+ i
, j
- i
);
5676 /* Now find the next non-match. */
5680 /* Clear the rest of the line, or the non-clear part of it. */
5683 cursor_to (vpos
, nlen
);
5684 clear_end_of_line (olen
);
5687 /* Make current row = desired row. */
5688 make_current (desired_matrix
, current_matrix
, vpos
);
5692 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5693 characters in a row. */
5697 /* If current line is blank, skip over initial spaces, if
5698 possible, and write the rest. */
5702 nsp
= count_blanks (nbody
, nlen
);
5706 cursor_to (vpos
, nsp
);
5707 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5710 /* Exchange contents between current_frame and new_frame. */
5711 make_current (desired_matrix
, current_matrix
, vpos
);
5715 /* Compute number of leading blanks in old and new contents. */
5716 osp
= count_blanks (obody
, olen
);
5717 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5719 /* Compute number of matching chars starting with first non-blank. */
5720 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5721 nbody
+ nsp
, nbody
+ nlen
);
5723 /* Spaces in new match implicit space past the end of old. */
5724 /* A bug causing this to be a no-op was fixed in 18.29. */
5725 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5728 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5732 /* Avoid doing insert/delete char
5733 just cause number of leading spaces differs
5734 when the following text does not match. */
5735 if (begmatch
== 0 && osp
!= nsp
)
5736 osp
= nsp
= min (osp
, nsp
);
5738 /* Find matching characters at end of line */
5741 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5743 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5748 endmatch
= obody
+ olen
- op1
;
5750 /* tem gets the distance to insert or delete.
5751 endmatch is how many characters we save by doing so.
5754 tem
= (nlen
- nsp
) - (olen
- osp
);
5756 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5759 /* nsp - osp is the distance to insert or delete.
5760 If that is nonzero, begmatch is known to be nonzero also.
5761 begmatch + endmatch is how much we save by doing the ins/del.
5765 && (!char_ins_del_ok
5766 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5770 osp
= nsp
= min (osp
, nsp
);
5773 /* Now go through the line, inserting, writing and
5774 deleting as appropriate. */
5778 cursor_to (vpos
, nsp
);
5779 delete_glyphs (osp
- nsp
);
5783 /* If going to delete chars later in line
5784 and insert earlier in the line,
5785 must delete first to avoid losing data in the insert */
5786 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5788 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5789 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5790 olen
= nlen
- (nsp
- osp
);
5792 cursor_to (vpos
, osp
);
5793 insert_glyphs (0, nsp
- osp
);
5797 tem
= nsp
+ begmatch
+ endmatch
;
5798 if (nlen
!= tem
|| olen
!= tem
)
5800 if (!endmatch
|| nlen
== olen
)
5802 /* If new text being written reaches right margin, there is
5803 no need to do clear-to-eol at the end of this function
5804 (and it would not be safe, since cursor is not going to
5805 be "at the margin" after the text is done). */
5806 if (nlen
== FRAME_TOTAL_COLS (f
))
5809 /* Function write_glyphs is prepared to do nothing
5810 if passed a length <= 0. Check it here to avoid
5811 unnecessary cursor movement. */
5814 cursor_to (vpos
, nsp
+ begmatch
);
5815 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5818 else if (nlen
> olen
)
5820 /* Here, we used to have the following simple code:
5821 ----------------------------------------
5822 write_glyphs (nbody + nsp + begmatch, olen - tem);
5823 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5824 ----------------------------------------
5825 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5826 is a padding glyph. */
5827 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5830 cursor_to (vpos
, nsp
+ begmatch
);
5832 /* Calculate columns we can actually overwrite. */
5833 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5835 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5837 /* If we left columns to be overwritten, we must delete them. */
5838 del
= olen
- tem
- out
;
5840 delete_glyphs (del
);
5842 /* At last, we insert columns not yet written out. */
5843 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5846 else if (olen
> nlen
)
5848 cursor_to (vpos
, nsp
+ begmatch
);
5849 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5850 delete_glyphs (olen
- nlen
);
5856 /* If any unerased characters remain after the new line, erase them. */
5859 cursor_to (vpos
, nlen
);
5860 clear_end_of_line (olen
);
5863 /* Exchange contents between current_frame and new_frame. */
5864 make_current (desired_matrix
, current_matrix
, vpos
);
5869 /***********************************************************************
5870 X/Y Position -> Buffer Position
5871 ***********************************************************************/
5873 /* Determine what's under window-relative pixel position (*X, *Y).
5874 Return the object (string or buffer) that's there.
5875 Return in *POS the position in that object.
5876 Adjust *X and *Y to character positions. */
5879 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5882 struct display_pos
*pos
;
5883 Lisp_Object
*object
;
5885 int *width
, *height
;
5888 struct buffer
*old_current_buffer
= current_buffer
;
5889 struct text_pos startp
;
5891 struct glyph_row
*row
;
5892 #ifdef HAVE_WINDOW_SYSTEM
5893 struct image
*img
= 0;
5897 current_buffer
= XBUFFER (w
->buffer
);
5898 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5899 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5900 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5901 start_display (&it
, w
, startp
);
5903 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5904 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5905 MOVE_TO_X
| MOVE_TO_Y
);
5907 current_buffer
= old_current_buffer
;
5909 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5910 *dy
= *y
- it
.current_y
;
5913 if (STRINGP (it
.string
))
5917 #ifdef HAVE_WINDOW_SYSTEM
5918 if (it
.what
== IT_IMAGE
)
5920 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5921 && !NILP (img
->spec
))
5922 *object
= img
->spec
;
5926 if (it
.vpos
< w
->current_matrix
->nrows
5927 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5930 if (it
.hpos
< row
->used
[TEXT_AREA
])
5932 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5933 #ifdef HAVE_WINDOW_SYSTEM
5936 *dy
-= row
->ascent
- glyph
->ascent
;
5937 *dx
+= glyph
->slice
.x
;
5938 *dy
+= glyph
->slice
.y
;
5939 /* Image slices positions are still relative to the entire image */
5940 *width
= img
->width
;
5941 *height
= img
->height
;
5946 *width
= glyph
->pixel_width
;
5947 *height
= glyph
->ascent
+ glyph
->descent
;
5953 *height
= row
->height
;
5958 *width
= *height
= 0;
5961 /* Add extra (default width) columns if clicked after EOL. */
5962 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5964 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5973 /* Value is the string under window-relative coordinates X/Y in the
5974 mode line or header line (PART says which) of window W, or nil if none.
5975 *CHARPOS is set to the position in the string returned. */
5978 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5980 enum window_part part
;
5983 Lisp_Object
*object
;
5985 int *width
, *height
;
5987 struct glyph_row
*row
;
5988 struct glyph
*glyph
, *end
;
5990 Lisp_Object string
= Qnil
;
5992 if (part
== ON_MODE_LINE
)
5993 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5995 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5997 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5999 if (row
->mode_line_p
&& row
->enabled_p
)
6001 /* Find the glyph under X. If we find one with a string object,
6002 it's the one we were looking for. */
6003 glyph
= row
->glyphs
[TEXT_AREA
];
6004 end
= glyph
+ row
->used
[TEXT_AREA
];
6005 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6006 x0
-= glyph
->pixel_width
;
6007 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6010 string
= glyph
->object
;
6011 *charpos
= glyph
->charpos
;
6012 *width
= glyph
->pixel_width
;
6013 *height
= glyph
->ascent
+ glyph
->descent
;
6014 #ifdef HAVE_WINDOW_SYSTEM
6015 if (glyph
->type
== IMAGE_GLYPH
)
6018 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6020 *object
= img
->spec
;
6021 y0
-= row
->ascent
- glyph
->ascent
;
6027 /* Add extra (default width) columns if clicked after EOL. */
6028 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6030 *height
= row
->height
;
6037 *width
= *height
= 0;
6047 /* Value is the string under window-relative coordinates X/Y in either
6048 marginal area, or nil if none. *CHARPOS is set to the position in
6049 the string returned. */
6052 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6054 enum window_part part
;
6057 Lisp_Object
*object
;
6059 int *width
, *height
;
6061 struct glyph_row
*row
= w
->current_matrix
->rows
;
6062 struct glyph
*glyph
, *end
;
6063 int x0
, y0
, i
, wy
= *y
;
6065 Lisp_Object string
= Qnil
;
6067 if (part
== ON_LEFT_MARGIN
)
6068 area
= LEFT_MARGIN_AREA
;
6069 else if (part
== ON_RIGHT_MARGIN
)
6070 area
= RIGHT_MARGIN_AREA
;
6074 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6075 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6078 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6082 /* Find the glyph under X. If we find one with a string object,
6083 it's the one we were looking for. */
6084 if (area
== RIGHT_MARGIN_AREA
)
6085 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6086 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6087 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6088 + window_box_width (w
, LEFT_MARGIN_AREA
)
6089 + window_box_width (w
, TEXT_AREA
));
6091 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6092 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6095 glyph
= row
->glyphs
[area
];
6096 end
= glyph
+ row
->used
[area
];
6097 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6098 x0
-= glyph
->pixel_width
;
6099 *x
= glyph
- row
->glyphs
[area
];
6102 string
= glyph
->object
;
6103 *charpos
= glyph
->charpos
;
6104 *width
= glyph
->pixel_width
;
6105 *height
= glyph
->ascent
+ glyph
->descent
;
6106 #ifdef HAVE_WINDOW_SYSTEM
6107 if (glyph
->type
== IMAGE_GLYPH
)
6110 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6112 *object
= img
->spec
;
6113 y0
-= row
->ascent
- glyph
->ascent
;
6114 x0
+= glyph
->slice
.x
;
6115 y0
+= glyph
->slice
.y
;
6121 /* Add extra (default width) columns if clicked after EOL. */
6122 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6124 *height
= row
->height
;
6131 *width
= *height
= 0;
6141 /***********************************************************************
6142 Changing Frame Sizes
6143 ***********************************************************************/
6148 window_change_signal (signalnum
) /* If we don't have an argument, */
6149 int signalnum
; /* some compilers complain in signal calls. */
6155 int old_errno
= errno
;
6157 signal (SIGWINCH
, window_change_signal
);
6158 SIGNAL_THREAD_CHECK (signalnum
);
6160 get_frame_size (&width
, &height
);
6162 /* The frame size change obviously applies to a termcap-controlled
6163 frame. Find such a frame in the list, and assume it's the only
6164 one (since the redisplay code always writes to stdout, not a
6165 FILE * specified in the frame structure). Record the new size,
6166 but don't reallocate the data structures now. Let that be done
6167 later outside of the signal handler. */
6170 Lisp_Object tail
, frame
;
6172 FOR_EACH_FRAME (tail
, frame
)
6174 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6176 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6184 #endif /* SIGWINCH */
6187 /* Do any change in frame size that was requested by a signal. SAFE
6188 non-zero means this function is called from a place where it is
6189 safe to change frame sizes while a redisplay is in progress. */
6192 do_pending_window_change (safe
)
6195 /* If window_change_signal should have run before, run it now. */
6196 if (redisplaying_p
&& !safe
)
6199 while (delayed_size_change
)
6201 Lisp_Object tail
, frame
;
6203 delayed_size_change
= 0;
6205 FOR_EACH_FRAME (tail
, frame
)
6207 struct frame
*f
= XFRAME (frame
);
6209 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6210 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6217 /* Change the frame height and/or width. Values may be given as zero to
6218 indicate no change is to take place.
6220 If DELAY is non-zero, then assume we're being called from a signal
6221 handler, and queue the change for later - perhaps the next
6222 redisplay. Since this tries to resize windows, we can't call it
6223 from a signal handler.
6225 SAFE non-zero means this function is called from a place where it's
6226 safe to change frame sizes while a redisplay is in progress. */
6229 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6230 register struct frame
*f
;
6231 int newheight
, newwidth
, pretend
, delay
, safe
;
6233 Lisp_Object tail
, frame
;
6235 if (! FRAME_WINDOW_P (f
))
6237 /* When using termcap, or on MS-DOS, all frames use
6238 the same screen, so a change in size affects all frames. */
6239 FOR_EACH_FRAME (tail
, frame
)
6240 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6241 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6242 pretend
, delay
, safe
);
6245 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6249 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6250 register struct frame
*f
;
6251 int newheight
, newwidth
, pretend
, delay
, safe
;
6253 int new_frame_total_cols
;
6254 int count
= SPECPDL_INDEX ();
6256 /* If we can't deal with the change now, queue it for later. */
6257 if (delay
|| (redisplaying_p
&& !safe
))
6259 f
->new_text_lines
= newheight
;
6260 f
->new_text_cols
= newwidth
;
6261 delayed_size_change
= 1;
6265 /* This size-change overrides any pending one for this frame. */
6266 f
->new_text_lines
= 0;
6267 f
->new_text_cols
= 0;
6269 /* If an argument is zero, set it to the current value. */
6271 newheight
= FRAME_LINES (f
);
6273 newwidth
= FRAME_COLS (f
);
6275 /* Compute width of windows in F.
6276 This is the width of the frame without vertical scroll bars. */
6277 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6279 /* Round up to the smallest acceptable size. */
6280 check_frame_size (f
, &newheight
, &newwidth
);
6282 /* If we're not changing the frame size, quit now. */
6283 if (newheight
== FRAME_LINES (f
)
6284 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6290 /* We only can set screen dimensions to certain values supported
6291 by our video hardware. Try to find the smallest size greater
6292 or equal to the requested dimensions. */
6293 dos_set_window_size (&newheight
, &newwidth
);
6296 if (newheight
!= FRAME_LINES (f
))
6298 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6300 /* Frame has both root and mini-buffer. */
6301 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6302 FRAME_TOP_MARGIN (f
));
6303 set_window_height (FRAME_ROOT_WINDOW (f
),
6306 - FRAME_TOP_MARGIN (f
)),
6308 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6310 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6313 /* Frame has just one top-level window. */
6314 set_window_height (FRAME_ROOT_WINDOW (f
),
6315 newheight
- FRAME_TOP_MARGIN (f
), 0);
6317 if (FRAME_TERMCAP_P (f
) && !pretend
)
6318 FrameRows
= newheight
;
6321 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6323 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6324 if (FRAME_HAS_MINIBUF_P (f
))
6325 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6327 if (FRAME_TERMCAP_P (f
) && !pretend
)
6328 FrameCols
= newwidth
;
6330 if (WINDOWP (f
->tool_bar_window
))
6331 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6334 FRAME_LINES (f
) = newheight
;
6335 SET_FRAME_COLS (f
, newwidth
);
6338 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6339 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6341 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6343 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6344 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6345 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6346 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6350 calculate_costs (f
);
6351 SET_FRAME_GARBAGED (f
);
6356 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6358 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6359 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6360 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6362 unbind_to (count
, Qnil
);
6367 /***********************************************************************
6368 Terminal Related Lisp Functions
6369 ***********************************************************************/
6371 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6372 1, 1, "FOpen termscript file: ",
6373 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6374 FILE = nil means just close any termscript file currently open. */)
6378 if (termscript
!= 0) fclose (termscript
);
6383 file
= Fexpand_file_name (file
, Qnil
);
6384 termscript
= fopen (SDATA (file
), "w");
6385 if (termscript
== 0)
6386 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6392 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6393 Ssend_string_to_terminal
, 1, 1, 0,
6394 doc
: /* Send STRING to the terminal without alteration.
6395 Control characters in STRING will have terminal-dependent effects. */)
6399 /* ??? Perhaps we should do something special for multibyte strings here. */
6400 CHECK_STRING (string
);
6401 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6405 fwrite (SDATA (string
), 1, SBYTES (string
),
6407 fflush (termscript
);
6413 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6414 doc
: /* Beep, or flash the screen.
6415 Also, unless an argument is given,
6416 terminate any keyboard macro currently executing. */)
6439 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6440 error ("Keyboard macro terminated by a command ringing the bell");
6448 /***********************************************************************
6450 ***********************************************************************/
6452 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6453 doc
: /* Pause, without updating display, for SECONDS seconds.
6454 SECONDS may be a floating-point value, meaning that you can wait for a
6455 fraction of a second. Optional second arg MILLISECONDS specifies an
6456 additional wait period, in milliseconds; this may be useful if your
6457 Emacs was built without floating point support.
6458 \(Not all operating systems support waiting for a fraction of a second.) */)
6459 (seconds
, milliseconds
)
6460 Lisp_Object seconds
, milliseconds
;
6464 if (NILP (milliseconds
))
6465 XSETINT (milliseconds
, 0);
6467 CHECK_NUMBER (milliseconds
);
6468 usec
= XINT (milliseconds
) * 1000;
6471 double duration
= extract_float (seconds
);
6472 sec
= (int) duration
;
6473 usec
+= (duration
- sec
) * 1000000;
6476 #ifndef EMACS_HAS_USECS
6477 if (sec
== 0 && usec
!= 0)
6478 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6481 /* Assure that 0 <= usec < 1000000. */
6484 /* We can't rely on the rounding being correct if usec is negative. */
6485 if (-1000000 < usec
)
6486 sec
--, usec
+= 1000000;
6488 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6491 sec
+= usec
/ 1000000, usec
%= 1000000;
6493 if (sec
< 0 || (sec
== 0 && usec
== 0))
6496 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6502 /* This is just like wait_reading_process_output, except that
6505 TIMEOUT is number of seconds to wait (float or integer),
6506 or t to wait forever.
6507 READING is 1 if reading input.
6508 If DO_DISPLAY is >0 display process output while waiting.
6509 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6513 sit_for (timeout
, reading
, do_display
)
6514 Lisp_Object timeout
;
6515 int reading
, do_display
;
6519 swallow_events (do_display
);
6521 if ((detect_input_pending_run_timers (do_display
))
6522 || !NILP (Vexecuting_kbd_macro
))
6525 if (do_display
>= 2)
6526 redisplay_preserve_echo_area (2);
6528 if (INTEGERP (timeout
))
6530 sec
= XINT (timeout
);
6533 else if (FLOATP (timeout
))
6535 double seconds
= XFLOAT_DATA (timeout
);
6536 sec
= (int) seconds
;
6537 usec
= (int) ((seconds
- sec
) * 1000000);
6539 else if (EQ (timeout
, Qt
))
6545 wrong_type_argument (Qnumberp
, timeout
);
6547 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6554 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6557 return detect_input_pending () ? Qnil
: Qt
;
6561 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6562 doc
: /* Perform redisplay if no input is available.
6563 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6564 perform a full redisplay even if input is available.
6565 Return t if redisplay was performed, nil otherwise. */)
6572 if ((detect_input_pending_run_timers (1)
6573 && NILP (force
) && !redisplay_dont_pause
)
6574 || !NILP (Vexecuting_kbd_macro
))
6577 count
= SPECPDL_INDEX ();
6578 if (!NILP (force
) && !redisplay_dont_pause
)
6579 specbind (Qredisplay_dont_pause
, Qt
);
6580 redisplay_preserve_echo_area (2);
6581 unbind_to (count
, Qnil
);
6587 /***********************************************************************
6588 Other Lisp Functions
6589 ***********************************************************************/
6591 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6592 session's frames, frame names, buffers, buffer-read-only flags, and
6593 buffer-modified-flags. */
6595 static Lisp_Object frame_and_buffer_state
;
6598 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6599 Sframe_or_buffer_changed_p
, 0, 1, 0,
6600 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6601 VARIABLE is a variable name whose value is either nil or a state vector
6602 that will be updated to contain all frames and buffers,
6603 aside from buffers whose names start with space,
6604 along with the buffers' read-only and modified flags. This allows a fast
6605 check to see whether buffer menus might need to be recomputed.
6606 If this function returns non-nil, it updates the internal vector to reflect
6609 If VARIABLE is nil, an internal variable is used. Users should not
6610 pass nil for VARIABLE. */)
6612 Lisp_Object variable
;
6614 Lisp_Object state
, tail
, frame
, buf
;
6615 Lisp_Object
*vecp
, *end
;
6618 if (! NILP (variable
))
6620 CHECK_SYMBOL (variable
);
6621 state
= Fsymbol_value (variable
);
6622 if (! VECTORP (state
))
6626 state
= frame_and_buffer_state
;
6628 vecp
= XVECTOR (state
)->contents
;
6629 end
= vecp
+ XVECTOR (state
)->size
;
6631 FOR_EACH_FRAME (tail
, frame
)
6635 if (!EQ (*vecp
++, frame
))
6639 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6642 /* Check that the buffer info matches. */
6643 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6645 buf
= XCDR (XCAR (tail
));
6646 /* Ignore buffers that aren't included in buffer lists. */
6647 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6651 if (!EQ (*vecp
++, buf
))
6655 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6659 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6664 /* Detect deletion of a buffer at the end of the list. */
6665 if (EQ (*vecp
, Qlambda
))
6668 /* Come here if we decide the data has changed. */
6670 /* Count the size we will need.
6671 Start with 1 so there is room for at least one lambda at the end. */
6673 FOR_EACH_FRAME (tail
, frame
)
6675 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6677 /* Reallocate the vector if data has grown to need it,
6678 or if it has shrunk a lot. */
6679 if (! VECTORP (state
)
6680 || n
> XVECTOR (state
)->size
6681 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6682 /* Add 20 extra so we grow it less often. */
6684 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6685 if (! NILP (variable
))
6686 Fset (variable
, state
);
6688 frame_and_buffer_state
= state
;
6691 /* Record the new data in the (possibly reallocated) vector. */
6692 vecp
= XVECTOR (state
)->contents
;
6693 FOR_EACH_FRAME (tail
, frame
)
6696 *vecp
++ = XFRAME (frame
)->name
;
6698 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6700 buf
= XCDR (XCAR (tail
));
6701 /* Ignore buffers that aren't included in buffer lists. */
6702 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6705 *vecp
++ = XBUFFER (buf
)->read_only
;
6706 *vecp
++ = Fbuffer_modified_p (buf
);
6708 /* Fill up the vector with lambdas (always at least one). */
6710 while (vecp
- XVECTOR (state
)->contents
6711 < XVECTOR (state
)->size
)
6713 /* Make sure we didn't overflow the vector. */
6714 if (vecp
- XVECTOR (state
)->contents
6715 > XVECTOR (state
)->size
)
6722 /***********************************************************************
6724 ***********************************************************************/
6726 char *terminal_type
;
6728 /* Initialization done when Emacs fork is started, before doing stty.
6729 Determine terminal type and set terminal_driver. Then invoke its
6730 decoding routine to set up variables in the terminal package. */
6735 #ifdef HAVE_X_WINDOWS
6736 extern int display_arg
;
6739 /* Construct the space glyph. */
6740 space_glyph
.type
= CHAR_GLYPH
;
6741 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6742 space_glyph
.charpos
= -1;
6746 cursor_in_echo_area
= 0;
6747 terminal_type
= (char *) 0;
6749 /* Now is the time to initialize this; it's used by init_sys_modes
6751 Vwindow_system
= Qnil
;
6753 /* If the user wants to use a window system, we shouldn't bother
6754 initializing the terminal. This is especially important when the
6755 terminal is so dumb that emacs gives up before and doesn't bother
6756 using the window system.
6758 If the DISPLAY environment variable is set and nonempty,
6759 try to use X, and die with an error message if that doesn't work. */
6761 #ifdef HAVE_X_WINDOWS
6762 if (! inhibit_window_system
&& ! display_arg
)
6766 display
= getenv ("DECW$DISPLAY");
6768 display
= getenv ("DISPLAY");
6771 display_arg
= (display
!= 0 && *display
!= 0);
6773 if (display_arg
&& !x_display_ok (display
))
6775 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6777 inhibit_window_system
= 1;
6781 if (!inhibit_window_system
&& display_arg
6787 Vwindow_system
= intern ("x");
6789 Vwindow_system_version
= make_number (11);
6791 Vwindow_system_version
= make_number (10);
6793 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6794 /* In some versions of ncurses,
6795 tputs crashes if we have not called tgetent.
6797 { char b
[2044]; tgetent (b
, "xterm");}
6799 adjust_frame_glyphs_initially ();
6802 #endif /* HAVE_X_WINDOWS */
6805 if (!inhibit_window_system
)
6807 Vwindow_system
= intern ("w32");
6808 Vwindow_system_version
= make_number (1);
6809 adjust_frame_glyphs_initially ();
6812 #endif /* HAVE_NTGUI */
6815 if (!inhibit_window_system
)
6817 Vwindow_system
= intern ("mac");
6818 Vwindow_system_version
= make_number (1);
6819 adjust_frame_glyphs_initially ();
6824 /* If no window system has been specified, try to use the terminal. */
6827 fatal ("standard input is not a tty");
6831 /* Look at the TERM variable. */
6832 terminal_type
= (char *) getenv ("TERM");
6836 fprintf (stderr
, "Please specify your terminal type.\n\
6837 For types defined in VMS, use set term /device=TYPE.\n\
6838 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6839 \(The quotation marks are necessary since terminal types are lower case.)\n");
6842 #ifdef HAVE_WINDOW_SYSTEM
6843 if (! inhibit_window_system
)
6844 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6846 #endif /* HAVE_WINDOW_SYSTEM */
6847 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6848 #endif /* not VMS */
6853 /* VMS DCL tends to up-case things, so down-case term type.
6854 Hardly any uppercase letters in terminal types; should be none. */
6856 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6859 strcpy (new, terminal_type
);
6861 for (p
= new; *p
; p
++)
6865 terminal_type
= new;
6869 term_init (terminal_type
);
6872 struct frame
*sf
= SELECTED_FRAME ();
6873 int width
= FRAME_TOTAL_COLS (sf
);
6874 int height
= FRAME_LINES (sf
);
6876 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6878 /* If these sizes are so big they cause overflow, just ignore the
6879 change. It's not clear what better we could do. */
6880 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6881 fatal ("screen size %dx%d too big", width
, height
);
6884 adjust_frame_glyphs_initially ();
6885 calculate_costs (XFRAME (selected_frame
));
6890 #endif /* CANNOT_DUMP */
6891 signal (SIGWINCH
, window_change_signal
);
6892 #endif /* SIGWINCH */
6894 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6898 /* The MSDOS terminal turns on its ``window system'' relatively
6899 late into the startup, so we cannot do the frame faces'
6900 initialization just yet. It will be done later by pc-win.el
6901 and internal_terminal_init. */
6902 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6904 && NILP (Vwindow_system
))
6906 /* For the initial frame, we don't have any way of knowing what
6907 are the foreground and background colors of the terminal. */
6908 struct frame
*sf
= SELECTED_FRAME();
6910 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6911 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6912 call0 (intern ("tty-set-up-initial-frame-faces"));
6918 /***********************************************************************
6920 ***********************************************************************/
6922 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6923 Sinternal_show_cursor
, 2, 2, 0,
6924 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6925 WINDOW nil means use the selected window. SHOW non-nil means
6926 show a cursor in WINDOW in the next redisplay. SHOW nil means
6927 don't show a cursor. */)
6929 Lisp_Object window
, show
;
6931 /* Don't change cursor state while redisplaying. This could confuse
6933 if (!redisplaying_p
)
6936 window
= selected_window
;
6938 CHECK_WINDOW (window
);
6940 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6947 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6948 Sinternal_show_cursor_p
, 0, 1, 0,
6949 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6950 WINDOW nil or omitted means report on the selected window. */)
6957 window
= selected_window
;
6959 CHECK_WINDOW (window
);
6961 w
= XWINDOW (window
);
6962 return w
->cursor_off_p
? Qnil
: Qt
;
6966 /***********************************************************************
6968 ***********************************************************************/
6973 defsubr (&Sredraw_frame
);
6974 defsubr (&Sredraw_display
);
6975 defsubr (&Sframe_or_buffer_changed_p
);
6976 defsubr (&Sopen_termscript
);
6978 defsubr (&Sredisplay
);
6979 defsubr (&Ssleep_for
);
6980 defsubr (&Ssend_string_to_terminal
);
6981 defsubr (&Sinternal_show_cursor
);
6982 defsubr (&Sinternal_show_cursor_p
);
6985 defsubr (&Sdump_redisplay_history
);
6988 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6989 staticpro (&frame_and_buffer_state
);
6991 Qdisplay_table
= intern ("display-table");
6992 staticpro (&Qdisplay_table
);
6993 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6994 staticpro (&Qredisplay_dont_pause
);
6996 DEFVAR_INT ("baud-rate", &baud_rate
,
6997 doc
: /* *The output baud rate of the terminal.
6998 On most systems, changing this value will affect the amount of padding
6999 and the other strategic decisions made during redisplay. */);
7001 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7002 doc
: /* *Non-nil means invert the entire frame display.
7003 This means everything is in inverse video which otherwise would not be. */);
7005 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7006 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7008 See also `ring-bell-function'. */);
7010 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7011 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7012 A non-nil value is useful if the terminal can automatically preserve
7013 Emacs's frame display when you reenter Emacs.
7014 It is up to you to set this variable if your terminal can do that. */);
7016 DEFVAR_LISP ("window-system", &Vwindow_system
,
7017 doc
: /* Name of window system that Emacs is displaying through.
7018 The value is a symbol--for instance, `x' for X windows.
7019 The value is nil if Emacs is using a text-only terminal. */);
7021 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7022 doc
: /* The version number of the window system in use.
7023 For X windows, this is 10 or 11. */);
7025 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7026 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7028 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7029 doc
: /* Table defining how to output a glyph code to the frame.
7030 If not nil, this is a vector indexed by glyph code to define the glyph.
7031 Each element can be:
7032 integer: a glyph code which this glyph is an alias for.
7033 string: output this glyph using that string (not impl. in X windows).
7034 nil: this glyph mod 524288 is the code of a character to output,
7035 and this glyph / 524288 is the face number (see `face-id') to use
7036 while outputting it. */);
7037 Vglyph_table
= Qnil
;
7039 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7040 doc
: /* Display table to use for buffers that specify none.
7041 See `buffer-display-table' for more information. */);
7042 Vstandard_display_table
= Qnil
;
7044 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7045 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7046 redisplay_dont_pause
= 0;
7048 #if PERIODIC_PREEMPTION_CHECKING
7049 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7050 doc
: /* *The period in seconds between checking for input during redisplay.
7051 If input is detected, redisplay is pre-empted, and the input is processed.
7052 If nil, never pre-empt redisplay. */);
7053 Vredisplay_preemption_period
= make_float (0.10);
7060 Vwindow_system
= Qnil
;
7061 Vwindow_system_version
= Qnil
;
7065 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7066 (do not change this comment) */