1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
40 #include "character.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* 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
)
2286 struct dim matrix_dim
;
2288 int window_change_flags
;
2291 if (!FRAME_LIVE_P (f
))
2294 top_window_y
= FRAME_TOP_MARGIN (f
);
2296 /* Allocate glyph pool structures if not already done. */
2297 if (f
->desired_pool
== NULL
)
2299 f
->desired_pool
= new_glyph_pool ();
2300 f
->current_pool
= new_glyph_pool ();
2303 /* Allocate frames matrix structures if needed. */
2304 if (f
->desired_matrix
== NULL
)
2306 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2307 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2310 /* Compute window glyph matrices. (This takes the mini-buffer
2311 window into account). The result is the size of the frame glyph
2312 matrix needed. The variable window_change_flags is set to a bit
2313 mask indicating whether new matrices will be allocated or
2314 existing matrices change their size or location within the frame
2316 window_change_flags
= 0;
2318 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2321 &window_change_flags
);
2323 /* Add in menu bar lines, if any. */
2324 matrix_dim
.height
+= top_window_y
;
2326 /* Enlarge pools as necessary. */
2327 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2328 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2330 /* Set up glyph pointers within window matrices. Do this only if
2331 absolutely necessary since it requires a frame redraw. */
2332 if (pool_changed_p
|| window_change_flags
)
2334 /* Do it for window matrices. */
2335 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2337 &window_change_flags
);
2339 /* Size of frame matrices must equal size of frame. Note
2340 that we are called for X frames with window widths NOT equal
2341 to the frame width (from CHANGE_FRAME_SIZE_1). */
2342 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2343 && matrix_dim
.height
== FRAME_LINES (f
));
2345 /* Pointers to glyph memory in glyph rows are exchanged during
2346 the update phase of redisplay, which means in general that a
2347 frame's current matrix consists of pointers into both the
2348 desired and current glyph pool of the frame. Adjusting a
2349 matrix sets the frame matrix up so that pointers are all into
2350 the same pool. If we want to preserve glyph contents of the
2351 current matrix over a call to adjust_glyph_matrix, we must
2352 make a copy of the current glyphs, and restore the current
2353 matrix' contents from that copy. */
2354 if (display_completed
2355 && !FRAME_GARBAGED_P (f
)
2356 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2357 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2359 struct glyph_matrix
*copy
= save_current_matrix (f
);
2360 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2361 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2362 restore_current_matrix (f
, copy
);
2363 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2367 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2368 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2369 SET_FRAME_GARBAGED (f
);
2375 /* Allocate/reallocate glyph matrices of a single frame F for
2376 window-based redisplay. */
2379 adjust_frame_glyphs_for_window_redisplay (f
)
2384 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2386 /* Allocate/reallocate window matrices. */
2387 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2389 /* Allocate/ reallocate matrices of the dummy window used to display
2390 the menu bar under X when no X toolkit support is available. */
2391 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2393 /* Allocate a dummy window if not already done. */
2394 if (NILP (f
->menu_bar_window
))
2396 f
->menu_bar_window
= make_window ();
2397 w
= XWINDOW (f
->menu_bar_window
);
2398 XSETFRAME (w
->frame
, f
);
2399 w
->pseudo_window_p
= 1;
2402 w
= XWINDOW (f
->menu_bar_window
);
2404 /* Set window dimensions to frame dimensions and allocate or
2405 adjust glyph matrices of W. */
2406 XSETFASTINT (w
->top_line
, 0);
2407 XSETFASTINT (w
->left_col
, 0);
2408 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2409 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2410 allocate_matrices_for_window_redisplay (w
);
2412 #endif /* not USE_X_TOOLKIT */
2415 /* Allocate/ reallocate matrices of the tool bar window. If we
2416 don't have a tool bar window yet, make one. */
2417 if (NILP (f
->tool_bar_window
))
2419 f
->tool_bar_window
= make_window ();
2420 w
= XWINDOW (f
->tool_bar_window
);
2421 XSETFRAME (w
->frame
, f
);
2422 w
->pseudo_window_p
= 1;
2425 w
= XWINDOW (f
->tool_bar_window
);
2427 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2428 XSETFASTINT (w
->left_col
, 0);
2429 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2430 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2431 allocate_matrices_for_window_redisplay (w
);
2436 /* Adjust/ allocate message buffer of frame F.
2438 Note that the message buffer is never freed. Since I could not
2439 find a free in 19.34, I assume that freeing it would be
2440 problematic in some way and don't do it either.
2442 (Implementation note: It should be checked if we can free it
2443 eventually without causing trouble). */
2446 adjust_frame_message_buffer (f
)
2449 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2451 if (FRAME_MESSAGE_BUF (f
))
2453 char *buffer
= FRAME_MESSAGE_BUF (f
);
2454 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2455 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2458 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2462 /* Re-allocate buffer for decode_mode_spec on frame F. */
2465 adjust_decode_mode_spec_buffer (f
)
2468 f
->decode_mode_spec_buffer
2469 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2470 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2475 /**********************************************************************
2476 Freeing Glyph Matrices
2477 **********************************************************************/
2479 /* Free glyph memory for a frame F. F may be null. This function can
2480 be called for the same frame more than once. The root window of
2481 F may be nil when this function is called. This is the case when
2482 the function is called when F is destroyed. */
2488 if (f
&& f
->glyphs_initialized_p
)
2490 /* Block interrupt input so that we don't get surprised by an X
2491 event while we're in an inconsistent state. */
2493 f
->glyphs_initialized_p
= 0;
2495 /* Release window sub-matrices. */
2496 if (!NILP (f
->root_window
))
2497 free_window_matrices (XWINDOW (f
->root_window
));
2499 /* Free the dummy window for menu bars without X toolkit and its
2501 if (!NILP (f
->menu_bar_window
))
2503 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2504 free_glyph_matrix (w
->desired_matrix
);
2505 free_glyph_matrix (w
->current_matrix
);
2506 w
->desired_matrix
= w
->current_matrix
= NULL
;
2507 f
->menu_bar_window
= Qnil
;
2510 /* Free the tool bar window and its glyph matrices. */
2511 if (!NILP (f
->tool_bar_window
))
2513 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2514 free_glyph_matrix (w
->desired_matrix
);
2515 free_glyph_matrix (w
->current_matrix
);
2516 w
->desired_matrix
= w
->current_matrix
= NULL
;
2517 f
->tool_bar_window
= Qnil
;
2520 /* Release frame glyph matrices. Reset fields to zero in
2521 case we are called a second time. */
2522 if (f
->desired_matrix
)
2524 free_glyph_matrix (f
->desired_matrix
);
2525 free_glyph_matrix (f
->current_matrix
);
2526 f
->desired_matrix
= f
->current_matrix
= NULL
;
2529 /* Release glyph pools. */
2530 if (f
->desired_pool
)
2532 free_glyph_pool (f
->desired_pool
);
2533 free_glyph_pool (f
->current_pool
);
2534 f
->desired_pool
= f
->current_pool
= NULL
;
2542 /* Free glyph sub-matrices in the window tree rooted at W. This
2543 function may be called with a null pointer, and it may be called on
2544 the same tree more than once. */
2547 free_window_matrices (w
)
2552 if (!NILP (w
->hchild
))
2553 free_window_matrices (XWINDOW (w
->hchild
));
2554 else if (!NILP (w
->vchild
))
2555 free_window_matrices (XWINDOW (w
->vchild
));
2558 /* This is a leaf window. Free its memory and reset fields
2559 to zero in case this function is called a second time for
2561 free_glyph_matrix (w
->current_matrix
);
2562 free_glyph_matrix (w
->desired_matrix
);
2563 w
->current_matrix
= w
->desired_matrix
= NULL
;
2566 /* Next window on same level. */
2567 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2572 /* Check glyph memory leaks. This function is called from
2573 shut_down_emacs. Note that frames are not destroyed when Emacs
2574 exits. We therefore free all glyph memory for all active frames
2575 explicitly and check that nothing is left allocated. */
2578 check_glyph_memory ()
2580 Lisp_Object tail
, frame
;
2582 /* Free glyph memory for all frames. */
2583 FOR_EACH_FRAME (tail
, frame
)
2584 free_glyphs (XFRAME (frame
));
2586 /* Check that nothing is left allocated. */
2587 if (glyph_matrix_count
)
2589 if (glyph_pool_count
)
2595 /**********************************************************************
2596 Building a Frame Matrix
2597 **********************************************************************/
2599 /* Most of the redisplay code works on glyph matrices attached to
2600 windows. This is a good solution most of the time, but it is not
2601 suitable for terminal code. Terminal output functions cannot rely
2602 on being able to set an arbitrary terminal window. Instead they
2603 must be provided with a view of the whole frame, i.e. the whole
2604 screen. We build such a view by constructing a frame matrix from
2605 window matrices in this section.
2607 Windows that must be updated have their must_be_update_p flag set.
2608 For all such windows, their desired matrix is made part of the
2609 desired frame matrix. For other windows, their current matrix is
2610 made part of the desired frame matrix.
2612 +-----------------+----------------+
2613 | desired | desired |
2615 +-----------------+----------------+
2618 +----------------------------------+
2620 Desired window matrices can be made part of the frame matrix in a
2621 cheap way: We exploit the fact that the desired frame matrix and
2622 desired window matrices share their glyph memory. This is not
2623 possible for current window matrices. Their glyphs are copied to
2624 the desired frame matrix. The latter is equivalent to
2625 preserve_other_columns in the old redisplay.
2627 Used glyphs counters for frame matrix rows are the result of adding
2628 up glyph lengths of the window matrices. A line in the frame
2629 matrix is enabled, if a corresponding line in a window matrix is
2632 After building the desired frame matrix, it will be passed to
2633 terminal code, which will manipulate both the desired and current
2634 frame matrix. Changes applied to the frame's current matrix have
2635 to be visible in current window matrices afterwards, of course.
2637 This problem is solved like this:
2639 1. Window and frame matrices share glyphs. Window matrices are
2640 constructed in a way that their glyph contents ARE the glyph
2641 contents needed in a frame matrix. Thus, any modification of
2642 glyphs done in terminal code will be reflected in window matrices
2645 2. Exchanges of rows in a frame matrix done by terminal code are
2646 intercepted by hook functions so that corresponding row operations
2647 on window matrices can be performed. This is necessary because we
2648 use pointers to glyphs in glyph row structures. To satisfy the
2649 assumption of point 1 above that glyphs are updated implicitly in
2650 window matrices when they are manipulated via the frame matrix,
2651 window and frame matrix must of course agree where to find the
2652 glyphs for their rows. Possible manipulations that must be
2653 mirrored are assignments of rows of the desired frame matrix to the
2654 current frame matrix and scrolling the current frame matrix. */
2656 /* Build frame F's desired matrix from window matrices. Only windows
2657 which have the flag must_be_updated_p set have to be updated. Menu
2658 bar lines of a frame are not covered by window matrices, so make
2659 sure not to touch them in this function. */
2662 build_frame_matrix (f
)
2667 /* F must have a frame matrix when this function is called. */
2668 xassert (!FRAME_WINDOW_P (f
));
2670 /* Clear all rows in the frame matrix covered by window matrices.
2671 Menu bar lines are not covered by windows. */
2672 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2673 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2675 /* Build the matrix by walking the window tree. */
2676 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2677 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2681 /* Walk a window tree, building a frame matrix MATRIX from window
2682 matrices. W is the root of a window tree. */
2685 build_frame_matrix_from_window_tree (matrix
, w
)
2686 struct glyph_matrix
*matrix
;
2691 if (!NILP (w
->hchild
))
2692 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2693 else if (!NILP (w
->vchild
))
2694 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2696 build_frame_matrix_from_leaf_window (matrix
, w
);
2698 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2703 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2704 desired frame matrix built. W is a leaf window whose desired or
2705 current matrix is to be added to FRAME_MATRIX. W's flag
2706 must_be_updated_p determines which matrix it contributes to
2707 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2708 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2709 Adding a desired matrix means setting up used counters and such in
2710 frame rows, while adding a current window matrix to FRAME_MATRIX
2711 means copying glyphs. The latter case corresponds to
2712 preserve_other_columns in the old redisplay. */
2715 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2716 struct glyph_matrix
*frame_matrix
;
2719 struct glyph_matrix
*window_matrix
;
2720 int window_y
, frame_y
;
2721 /* If non-zero, a glyph to insert at the right border of W. */
2722 GLYPH right_border_glyph
= 0;
2724 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2725 if (w
->must_be_updated_p
)
2727 window_matrix
= w
->desired_matrix
;
2729 /* Decide whether we want to add a vertical border glyph. */
2730 if (!WINDOW_RIGHTMOST_P (w
))
2732 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2735 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2736 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2739 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2741 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2745 window_matrix
= w
->current_matrix
;
2747 /* For all rows in the window matrix and corresponding rows in the
2750 frame_y
= window_matrix
->matrix_y
;
2751 while (window_y
< window_matrix
->nrows
)
2753 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2754 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2755 int current_row_p
= window_matrix
== w
->current_matrix
;
2757 /* Fill up the frame row with spaces up to the left margin of the
2759 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2761 /* Fill up areas in the window matrix row with spaces. */
2762 fill_up_glyph_row_with_spaces (window_row
);
2764 /* If only part of W's desired matrix has been built, and
2765 window_row wasn't displayed, use the corresponding current
2767 if (window_matrix
== w
->desired_matrix
2768 && !window_row
->enabled_p
)
2770 window_row
= w
->current_matrix
->rows
+ window_y
;
2776 /* Copy window row to frame row. */
2777 bcopy (window_row
->glyphs
[0],
2778 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2779 window_matrix
->matrix_w
* sizeof (struct glyph
));
2783 xassert (window_row
->enabled_p
);
2785 /* Only when a desired row has been displayed, we want
2786 the corresponding frame row to be updated. */
2787 frame_row
->enabled_p
= 1;
2789 /* Maybe insert a vertical border between horizontally adjacent
2791 if (right_border_glyph
)
2793 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2794 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2798 /* Window row window_y must be a slice of frame row
2800 xassert (glyph_row_slice_p (window_row
, frame_row
));
2802 /* If rows are in sync, we don't have to copy glyphs because
2803 frame and window share glyphs. */
2805 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2806 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2810 /* Set number of used glyphs in the frame matrix. Since we fill
2811 up with spaces, and visit leaf windows from left to right it
2812 can be done simply. */
2813 frame_row
->used
[TEXT_AREA
]
2814 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2822 /* Given a user-specified glyph, possibly including a Lisp-level face
2823 ID, return a glyph that has a realized face ID.
2824 This is used for glyphs displayed specially and not part of the text;
2825 for instance, vertical separators, truncation markers, etc. */
2828 spec_glyph_lookup_face (w
, glyph
)
2832 int lface_id
= FAST_GLYPH_FACE (glyph
);
2833 /* Convert the glyph's specified face to a realized (cache) face. */
2836 int face_id
= merge_faces (XFRAME (w
->frame
),
2837 Qt
, lface_id
, DEFAULT_FACE_ID
);
2839 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2844 /* Add spaces to a glyph row ROW in a window matrix.
2846 Each row has the form:
2848 +---------+-----------------------------+------------+
2849 | left | text | right |
2850 +---------+-----------------------------+------------+
2852 Left and right marginal areas are optional. This function adds
2853 spaces to areas so that there are no empty holes between areas.
2854 In other words: If the right area is not empty, the text area
2855 is filled up with spaces up to the right area. If the text area
2856 is not empty, the left area is filled up.
2858 To be called for frame-based redisplay, only. */
2861 fill_up_glyph_row_with_spaces (row
)
2862 struct glyph_row
*row
;
2864 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2865 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2866 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2870 /* Fill area AREA of glyph row ROW with spaces. To be called for
2871 frame-based redisplay only. */
2874 fill_up_glyph_row_area_with_spaces (row
, area
)
2875 struct glyph_row
*row
;
2878 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2880 struct glyph
*end
= row
->glyphs
[area
+ 1];
2881 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2884 *text
++ = space_glyph
;
2885 row
->used
[area
] = text
- row
->glyphs
[area
];
2890 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2891 reached. In frame matrices only one area, TEXT_AREA, is used. */
2894 fill_up_frame_row_with_spaces (row
, upto
)
2895 struct glyph_row
*row
;
2898 int i
= row
->used
[TEXT_AREA
];
2899 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2902 glyph
[i
++] = space_glyph
;
2904 row
->used
[TEXT_AREA
] = i
;
2909 /**********************************************************************
2910 Mirroring operations on frame matrices in window matrices
2911 **********************************************************************/
2913 /* Set frame being updated via frame-based redisplay to F. This
2914 function must be called before updates to make explicit that we are
2915 working on frame matrices or not. */
2918 set_frame_matrix_frame (f
)
2921 frame_matrix_frame
= f
;
2925 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2926 DESIRED_MATRIX is the desired matrix corresponding to
2927 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2928 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2929 frame_matrix_frame is non-null, this indicates that the exchange is
2930 done in frame matrices, and that we have to perform analogous
2931 operations in window matrices of frame_matrix_frame. */
2934 make_current (desired_matrix
, current_matrix
, row
)
2935 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2938 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2939 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2940 int mouse_face_p
= current_row
->mouse_face_p
;
2942 /* Do current_row = desired_row. This exchanges glyph pointers
2943 between both rows, and does a structure assignment otherwise. */
2944 assign_row (current_row
, desired_row
);
2946 /* Enable current_row to mark it as valid. */
2947 current_row
->enabled_p
= 1;
2948 current_row
->mouse_face_p
= mouse_face_p
;
2950 /* If we are called on frame matrices, perform analogous operations
2951 for window matrices. */
2952 if (frame_matrix_frame
)
2953 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2957 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2958 W's frame which has been made current (by swapping pointers between
2959 current and desired matrix). Perform analogous operations in the
2960 matrices of leaf windows in the window tree rooted at W. */
2963 mirror_make_current (w
, frame_row
)
2969 if (!NILP (w
->hchild
))
2970 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2971 else if (!NILP (w
->vchild
))
2972 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2975 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2976 here because the checks performed in debug mode there
2977 will not allow the conversion. */
2978 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2980 /* If FRAME_ROW is within W, assign the desired row to the
2981 current row (exchanging glyph pointers). */
2982 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2984 struct glyph_row
*current_row
2985 = MATRIX_ROW (w
->current_matrix
, row
);
2986 struct glyph_row
*desired_row
2987 = MATRIX_ROW (w
->desired_matrix
, row
);
2989 if (desired_row
->enabled_p
)
2990 assign_row (current_row
, desired_row
);
2992 swap_glyph_pointers (desired_row
, current_row
);
2993 current_row
->enabled_p
= 1;
2997 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3002 /* Perform row dance after scrolling. We are working on the range of
3003 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3004 including) in MATRIX. COPY_FROM is a vector containing, for each
3005 row I in the range 0 <= I < NLINES, the index of the original line
3006 to move to I. This index is relative to the row range, i.e. 0 <=
3007 index < NLINES. RETAINED_P is a vector containing zero for each
3008 row 0 <= I < NLINES which is empty.
3010 This function is called from do_scrolling and do_direct_scrolling. */
3013 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3015 struct glyph_matrix
*matrix
;
3016 int unchanged_at_top
, nlines
;
3020 /* A copy of original rows. */
3021 struct glyph_row
*old_rows
;
3023 /* Rows to assign to. */
3024 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3028 /* Make a copy of the original rows. */
3029 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3030 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3032 /* Assign new rows, maybe clear lines. */
3033 for (i
= 0; i
< nlines
; ++i
)
3035 int enabled_before_p
= new_rows
[i
].enabled_p
;
3037 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3038 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3039 new_rows
[i
] = old_rows
[copy_from
[i
]];
3040 new_rows
[i
].enabled_p
= enabled_before_p
;
3042 /* RETAINED_P is zero for empty lines. */
3043 if (!retained_p
[copy_from
[i
]])
3044 new_rows
[i
].enabled_p
= 0;
3047 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3048 if (frame_matrix_frame
)
3049 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3050 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3054 /* Synchronize glyph pointers in the current matrix of window W with
3055 the current frame matrix. */
3058 sync_window_with_frame_matrix_rows (w
)
3061 struct frame
*f
= XFRAME (w
->frame
);
3062 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3063 int left
, right
, x
, width
;
3065 /* Preconditions: W must be a leaf window on a tty frame. */
3066 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3067 xassert (!FRAME_WINDOW_P (f
));
3069 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3070 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3071 x
= w
->current_matrix
->matrix_x
;
3072 width
= w
->current_matrix
->matrix_w
;
3074 window_row
= w
->current_matrix
->rows
;
3075 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3076 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3078 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3080 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3081 = frame_row
->glyphs
[0] + x
;
3082 window_row
->glyphs
[TEXT_AREA
]
3083 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3084 window_row
->glyphs
[LAST_AREA
]
3085 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3086 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3087 = window_row
->glyphs
[LAST_AREA
] - right
;
3092 /* Return the window in the window tree rooted in W containing frame
3093 row ROW. Value is null if none is found. */
3096 frame_row_to_window (w
, row
)
3100 struct window
*found
= NULL
;
3104 if (!NILP (w
->hchild
))
3105 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3106 else if (!NILP (w
->vchild
))
3107 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3108 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3109 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3112 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3119 /* Perform a line dance in the window tree rooted at W, after
3120 scrolling a frame matrix in mirrored_line_dance.
3122 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3123 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3124 COPY_FROM is a vector containing, for each row I in the range 0 <=
3125 I < NLINES, the index of the original line to move to I. This
3126 index is relative to the row range, i.e. 0 <= index < NLINES.
3127 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3131 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3133 int unchanged_at_top
, nlines
;
3139 if (!NILP (w
->hchild
))
3140 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3141 nlines
, copy_from
, retained_p
);
3142 else if (!NILP (w
->vchild
))
3143 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3144 nlines
, copy_from
, retained_p
);
3147 /* W is a leaf window, and we are working on its current
3149 struct glyph_matrix
*m
= w
->current_matrix
;
3151 struct glyph_row
*old_rows
;
3153 /* Make a copy of the original rows of matrix m. */
3154 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3155 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3157 for (i
= 0; i
< nlines
; ++i
)
3159 /* Frame relative line assigned to. */
3160 int frame_to
= i
+ unchanged_at_top
;
3162 /* Frame relative line assigned. */
3163 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3165 /* Window relative line assigned to. */
3166 int window_to
= frame_to
- m
->matrix_y
;
3168 /* Window relative line assigned. */
3169 int window_from
= frame_from
- m
->matrix_y
;
3171 /* Is assigned line inside window? */
3172 int from_inside_window_p
3173 = window_from
>= 0 && window_from
< m
->matrix_h
;
3175 /* Is assigned to line inside window? */
3176 int to_inside_window_p
3177 = window_to
>= 0 && window_to
< m
->matrix_h
;
3179 if (from_inside_window_p
&& to_inside_window_p
)
3181 /* Enabled setting before assignment. */
3182 int enabled_before_p
;
3184 /* Do the assignment. The enabled_p flag is saved
3185 over the assignment because the old redisplay did
3187 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3188 m
->rows
[window_to
] = old_rows
[window_from
];
3189 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3191 /* If frame line is empty, window line is empty, too. */
3192 if (!retained_p
[copy_from
[i
]])
3193 m
->rows
[window_to
].enabled_p
= 0;
3195 else if (to_inside_window_p
)
3197 /* A copy between windows. This is an infrequent
3198 case not worth optimizing. */
3199 struct frame
*f
= XFRAME (w
->frame
);
3200 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3202 struct glyph_matrix
*m2
;
3205 w2
= frame_row_to_window (root
, frame_from
);
3206 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3207 -nw', FROM_FRAME sometimes has no associated window.
3208 This check avoids a segfault if W2 is null. */
3211 m2
= w2
->current_matrix
;
3212 m2_from
= frame_from
- m2
->matrix_y
;
3213 copy_row_except_pointers (m
->rows
+ window_to
,
3214 m2
->rows
+ m2_from
);
3216 /* If frame line is empty, window line is empty, too. */
3217 if (!retained_p
[copy_from
[i
]])
3218 m
->rows
[window_to
].enabled_p
= 0;
3222 else if (from_inside_window_p
)
3226 /* If there was a copy between windows, make sure glyph
3227 pointers are in sync with the frame matrix. */
3229 sync_window_with_frame_matrix_rows (w
);
3231 /* Check that no pointers are lost. */
3235 /* Next window on same level. */
3236 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3243 /* Check that window and frame matrices agree about their
3244 understanding where glyphs of the rows are to find. For each
3245 window in the window tree rooted at W, check that rows in the
3246 matrices of leaf window agree with their frame matrices about
3250 check_window_matrix_pointers (w
)
3255 if (!NILP (w
->hchild
))
3256 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3257 else if (!NILP (w
->vchild
))
3258 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3261 struct frame
*f
= XFRAME (w
->frame
);
3262 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3263 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3266 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3271 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3272 a window and FRAME_MATRIX is the corresponding frame matrix. For
3273 each row in WINDOW_MATRIX check that it's a slice of the
3274 corresponding frame row. If it isn't, abort. */
3277 check_matrix_pointers (window_matrix
, frame_matrix
)
3278 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3280 /* Row number in WINDOW_MATRIX. */
3283 /* Row number corresponding to I in FRAME_MATRIX. */
3284 int j
= window_matrix
->matrix_y
;
3286 /* For all rows check that the row in the window matrix is a
3287 slice of the row in the frame matrix. If it isn't we didn't
3288 mirror an operation on the frame matrix correctly. */
3289 while (i
< window_matrix
->nrows
)
3291 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3292 frame_matrix
->rows
+ j
))
3298 #endif /* GLYPH_DEBUG != 0 */
3302 /**********************************************************************
3303 VPOS and HPOS translations
3304 **********************************************************************/
3308 /* Translate vertical position VPOS which is relative to window W to a
3309 vertical position relative to W's frame. */
3312 window_to_frame_vpos (w
, vpos
)
3316 struct frame
*f
= XFRAME (w
->frame
);
3318 xassert (!FRAME_WINDOW_P (f
));
3319 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3320 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3321 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3326 /* Translate horizontal position HPOS which is relative to window W to
3327 a horizontal position relative to W's frame. */
3330 window_to_frame_hpos (w
, hpos
)
3334 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3335 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3339 #endif /* GLYPH_DEBUG */
3343 /**********************************************************************
3345 **********************************************************************/
3347 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3348 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3354 CHECK_LIVE_FRAME (frame
);
3357 /* Ignore redraw requests, if frame has no glyphs yet.
3358 (Implementation note: It still has to be checked why we are
3359 called so early here). */
3360 if (!glyphs_initialized_initially_p
)
3364 if (FRAME_MSDOS_P (f
))
3365 set_terminal_modes ();
3367 clear_current_matrices (f
);
3370 windows_or_buffers_changed
++;
3371 /* Mark all windows as inaccurate, so that every window will have
3372 its redisplay done. */
3373 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3374 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3380 /* Redraw frame F. This is nothing more than a call to the Lisp
3381 function redraw-frame. */
3388 XSETFRAME (frame
, f
);
3389 Fredraw_frame (frame
);
3393 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3394 doc
: /* Clear and redisplay all visible frames. */)
3397 Lisp_Object tail
, frame
;
3399 FOR_EACH_FRAME (tail
, frame
)
3400 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3401 Fredraw_frame (frame
);
3407 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3408 visible frames marked as garbaged. */
3411 redraw_garbaged_frames ()
3413 Lisp_Object tail
, frame
;
3415 FOR_EACH_FRAME (tail
, frame
)
3416 if (FRAME_VISIBLE_P (XFRAME (frame
))
3417 && FRAME_GARBAGED_P (XFRAME (frame
)))
3418 Fredraw_frame (frame
);
3423 /***********************************************************************
3425 ***********************************************************************/
3427 /* Try to update display and current glyph matrix directly.
3429 This function is called after a character G has been inserted into
3430 current_buffer. It tries to update the current glyph matrix and
3431 perform appropriate screen output to reflect the insertion. If it
3432 succeeds, the global flag redisplay_performed_directly_p will be
3433 set to 1, and thereby prevent the more costly general redisplay
3434 from running (see redisplay_internal).
3436 This function is not called for `hairy' character insertions.
3437 In particular, it is not called when after or before change
3438 functions exist, like they are used by font-lock. See keyboard.c
3439 for details where this function is called. */
3442 direct_output_for_insert (g
)
3445 register struct frame
*f
= SELECTED_FRAME ();
3446 struct window
*w
= XWINDOW (selected_window
);
3448 struct glyph_row
*glyph_row
;
3449 struct glyph
*glyphs
, *glyph
, *end
;
3451 /* Non-null means that redisplay of W is based on window matrices. */
3452 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3453 /* Non-null means we are in overwrite mode. */
3454 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3456 struct text_pos pos
;
3457 int delta
, delta_bytes
;
3459 /* Not done directly. */
3460 redisplay_performed_directly_p
= 0;
3462 /* Quickly give up for some common cases. */
3463 if (cursor_in_echo_area
3464 /* Give up if fonts have changed. */
3466 /* Give up if face attributes have been changed. */
3467 || face_change_count
3468 /* Give up if cursor position not really known. */
3469 || !display_completed
3470 /* Give up if buffer appears in two places. */
3471 || buffer_shared
> 1
3472 /* Give up if currently displaying a message instead of the
3473 minibuffer contents. */
3474 || (EQ (selected_window
, minibuf_window
)
3475 && EQ (minibuf_window
, echo_area_window
))
3476 /* Give up for hscrolled mini-buffer because display of the prompt
3477 is handled specially there (see display_line). */
3478 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3479 /* Give up if overwriting in the middle of a line. */
3482 && FETCH_BYTE (PT
) != '\n')
3483 /* Give up for tabs and line ends. */
3487 /* Give up if unable to display the cursor in the window. */
3488 || w
->cursor
.vpos
< 0
3489 /* Give up if we are showing a message or just cleared the message
3490 because we might need to resize the echo area window. */
3491 || !NILP (echo_area_buffer
[0])
3492 || !NILP (echo_area_buffer
[1])
3493 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3494 /* Can't do it in a continued line because continuation
3495 lines would change. */
3496 (glyph_row
->continued_p
3497 || glyph_row
->exact_window_width_line_p
3498 /* Can't use this method if the line overlaps others or is
3499 overlapped by others because these other lines would
3500 have to be redisplayed. */
3501 || glyph_row
->overlapping_p
3502 || glyph_row
->overlapped_p
))
3503 /* Can't do it for partial width windows on terminal frames
3504 because we can't clear to eol in such a window. */
3505 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3508 /* If we can't insert glyphs, we can use this method only
3509 at the end of a line. */
3510 if (!char_ins_del_ok
)
3511 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3514 /* Set up a display iterator structure for W. Glyphs will be
3515 produced in scratch_glyph_row. Current position is W's cursor
3517 clear_glyph_row (&scratch_glyph_row
);
3518 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3519 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3520 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3523 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3524 if (glyph_row
->mouse_face_p
)
3527 /* Give up if highlighting trailing whitespace and we have trailing
3528 whitespace in glyph_row. We would have to remove the trailing
3529 whitespace face in that case. */
3530 if (!NILP (Vshow_trailing_whitespace
)
3531 && glyph_row
->used
[TEXT_AREA
])
3535 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3536 if (last
->type
== STRETCH_GLYPH
3537 || (last
->type
== CHAR_GLYPH
3538 && last
->u
.ch
== ' '))
3542 /* Give up if there are overlay strings at pos. This would fail
3543 if the overlay string has newlines in it. */
3544 if (STRINGP (it
.string
))
3547 it
.hpos
= w
->cursor
.hpos
;
3548 it
.vpos
= w
->cursor
.vpos
;
3549 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3550 it
.current_y
= w
->cursor
.y
;
3551 it
.end_charpos
= PT
;
3552 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3553 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3555 /* More than one display element may be returned for PT - 1 if
3556 (i) it's a control character which is translated into `\003' or
3557 `^C', or (ii) it has a display table entry, or (iii) it's a
3558 combination of both. */
3559 delta
= delta_bytes
= 0;
3560 while (get_next_display_element (&it
))
3562 PRODUCE_GLYPHS (&it
);
3564 /* Give up if glyph doesn't fit completely on the line. */
3565 if (it
.current_x
>= it
.last_visible_x
)
3568 /* Give up if new glyph has different ascent or descent than
3569 the original row, or if it is not a character glyph. */
3570 if (glyph_row
->ascent
!= it
.ascent
3571 || glyph_row
->height
!= it
.ascent
+ it
.descent
3572 || glyph_row
->phys_ascent
!= it
.phys_ascent
3573 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3574 || it
.what
!= IT_CHARACTER
)
3578 delta_bytes
+= it
.len
;
3579 set_iterator_to_next (&it
, 1);
3582 /* Give up if we hit the right edge of the window. We would have
3583 to insert truncation or continuation glyphs. */
3584 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3585 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3588 /* Give up if there is a \t following in the line. */
3590 it2
.end_charpos
= ZV
;
3591 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3592 while (get_next_display_element (&it2
)
3593 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3597 set_iterator_to_next (&it2
, 1);
3600 /* Number of new glyphs produced. */
3601 n
= it
.glyph_row
->used
[TEXT_AREA
];
3603 /* Start and end of glyphs in original row. */
3604 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3605 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3607 /* Make room for new glyphs, then insert them. */
3608 xassert (end
- glyphs
- n
>= 0);
3609 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3610 (end
- glyphs
- n
) * sizeof (*end
));
3611 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3612 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3613 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3615 /* Compute new line width. */
3616 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3617 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3618 glyph_row
->pixel_width
= glyph_row
->x
;
3621 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3625 /* Increment buffer positions for glyphs following the newly
3627 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3628 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3629 glyph
->charpos
+= delta
;
3631 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3633 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3634 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3637 /* Adjust positions in lines following the one we are in. */
3638 increment_matrix_positions (w
->current_matrix
,
3640 w
->current_matrix
->nrows
,
3641 delta
, delta_bytes
);
3643 glyph_row
->contains_overlapping_glyphs_p
3644 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3646 glyph_row
->displays_text_p
= 1;
3647 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3648 XFASTINT (w
->window_end_vpos
)));
3650 if (!NILP (Vshow_trailing_whitespace
))
3651 highlight_trailing_whitespace (it
.f
, glyph_row
);
3653 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3654 In the middle, we have to insert glyphs. Note that this is now
3655 implemented for X frames. The implementation uses updated_window
3657 updated_row
= glyph_row
;
3658 updated_area
= TEXT_AREA
;
3662 rif
->update_window_begin_hook (w
);
3664 if (glyphs
== end
- n
3665 /* In front of a space added by append_space. */
3666 || (glyphs
== end
- n
- 1
3667 && (end
- n
)->charpos
<= 0))
3668 rif
->write_glyphs (glyphs
, n
);
3670 rif
->insert_glyphs (glyphs
, n
);
3674 if (glyphs
== end
- n
)
3675 write_glyphs (glyphs
, n
);
3677 insert_glyphs (glyphs
, n
);
3680 w
->cursor
.hpos
+= n
;
3681 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3682 xassert (w
->cursor
.hpos
>= 0
3683 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3685 /* How to set the cursor differs depending on whether we are
3686 using a frame matrix or a window matrix. Note that when
3687 a frame matrix is used, cursor_to expects frame coordinates,
3688 and the X and Y parameters are not used. */
3689 if (window_redisplay_p
)
3690 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3691 w
->cursor
.y
, w
->cursor
.x
);
3695 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3696 + (INTEGERP (w
->left_margin_cols
)
3697 ? XFASTINT (w
->left_margin_cols
)
3699 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3703 #ifdef HAVE_WINDOW_SYSTEM
3704 update_window_fringes (w
, 0);
3708 rif
->update_window_end_hook (w
, 1, 0);
3713 TRACE ((stderr
, "direct output for insert\n"));
3714 mark_window_display_accurate (it
.window
, 1);
3715 redisplay_performed_directly_p
= 1;
3720 /* Perform a direct display update for moving PT by N positions
3721 left or right. N < 0 means a movement backwards. This function
3722 is currently only called for N == 1 or N == -1. */
3725 direct_output_forward_char (n
)
3728 struct frame
*f
= SELECTED_FRAME ();
3729 struct window
*w
= XWINDOW (selected_window
);
3730 struct glyph_row
*row
;
3732 /* Give up if point moved out of or into a composition. */
3733 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3734 current_buffer
, PT
))
3737 /* Give up if face attributes have been changed. */
3738 if (face_change_count
)
3741 /* Give up if current matrix is not up to date or we are
3742 displaying a message. */
3743 if (!display_completed
|| cursor_in_echo_area
)
3746 /* Give up if the buffer's direction is reversed. */
3747 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3750 /* Can't use direct output if highlighting a region. */
3751 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3754 /* Can't use direct output if highlighting trailing whitespace. */
3755 if (!NILP (Vshow_trailing_whitespace
))
3758 /* Give up if we are showing a message or just cleared the message
3759 because we might need to resize the echo area window. */
3760 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3763 /* Give up if currently displaying a message instead of the
3764 minibuffer contents. */
3765 if (XWINDOW (minibuf_window
) == w
3766 && EQ (minibuf_window
, echo_area_window
))
3769 /* Give up if we don't know where the cursor is. */
3770 if (w
->cursor
.vpos
< 0)
3773 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3775 /* Give up if PT is outside of the last known cursor row. */
3776 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3777 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3780 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3782 w
->last_cursor
= w
->cursor
;
3783 XSETFASTINT (w
->last_point
, PT
);
3785 xassert (w
->cursor
.hpos
>= 0
3786 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3788 if (FRAME_WINDOW_P (f
))
3789 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3790 w
->cursor
.y
, w
->cursor
.x
);
3794 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3795 + (INTEGERP (w
->left_margin_cols
)
3796 ? XFASTINT (w
->left_margin_cols
)
3798 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3803 redisplay_performed_directly_p
= 1;
3809 /***********************************************************************
3811 ***********************************************************************/
3813 /* Update frame F based on the data in desired matrices.
3815 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3816 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3819 Value is non-zero if redisplay was stopped due to pending input. */
3822 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3825 int inhibit_hairy_id_p
;
3827 /* 1 means display has been paused because of pending input. */
3829 struct window
*root_window
= XWINDOW (f
->root_window
);
3831 #if PERIODIC_PREEMPTION_CHECKING
3832 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3835 double p
= XFLOATINT (Vredisplay_preemption_period
);
3838 if (detect_input_pending_ignore_squeezables ())
3845 usec
= (p
- sec
) * 1000000;
3847 EMACS_GET_TIME (tm
);
3848 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3849 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3853 if (FRAME_WINDOW_P (f
))
3855 /* We are working on window matrix basis. All windows whose
3856 flag must_be_updated_p is set have to be updated. */
3858 /* Record that we are not working on frame matrices. */
3859 set_frame_matrix_frame (NULL
);
3861 /* Update all windows in the window tree of F, maybe stopping
3862 when pending input is detected. */
3865 /* Update the menu bar on X frames that don't have toolkit
3867 if (WINDOWP (f
->menu_bar_window
))
3868 update_window (XWINDOW (f
->menu_bar_window
), 1);
3870 /* Update the tool-bar window, if present. */
3871 if (WINDOWP (f
->tool_bar_window
))
3873 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3875 /* Update tool-bar window. */
3876 if (w
->must_be_updated_p
)
3880 update_window (w
, 1);
3881 w
->must_be_updated_p
= 0;
3883 /* Swap tool-bar strings. We swap because we want to
3885 tem
= f
->current_tool_bar_string
;
3886 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3887 f
->desired_tool_bar_string
= tem
;
3892 /* Update windows. */
3893 paused_p
= update_window_tree (root_window
, force_p
);
3896 /* This flush is a performance bottleneck under X,
3897 and it doesn't seem to be necessary anyway (in general).
3898 It is necessary when resizing the window with the mouse, or
3899 at least the fringes are not redrawn in a timely manner. ++kfs */
3900 if (f
->force_flush_display_p
)
3902 rif
->flush_display (f
);
3903 f
->force_flush_display_p
= 0;
3908 /* We are working on frame matrix basis. Set the frame on whose
3909 frame matrix we operate. */
3910 set_frame_matrix_frame (f
);
3912 /* Build F's desired matrix from window matrices. */
3913 build_frame_matrix (f
);
3915 /* Update the display */
3917 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3921 fflush (termscript
);
3924 /* Check window matrices for lost pointers. */
3926 check_window_matrix_pointers (root_window
);
3927 add_frame_display_history (f
, paused_p
);
3932 /* Reset flags indicating that a window should be updated. */
3933 set_window_update_flags (root_window
, 0);
3935 display_completed
= !paused_p
;
3941 /************************************************************************
3942 Window-based updates
3943 ************************************************************************/
3945 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3946 don't stop updating when input is pending. */
3949 update_window_tree (w
, force_p
)
3955 while (w
&& !paused_p
)
3957 if (!NILP (w
->hchild
))
3958 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3959 else if (!NILP (w
->vchild
))
3960 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3961 else if (w
->must_be_updated_p
)
3962 paused_p
|= update_window (w
, force_p
);
3964 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3971 /* Update window W if its flag must_be_updated_p is non-zero. If
3972 FORCE_P is non-zero, don't stop updating if input is pending. */
3975 update_single_window (w
, force_p
)
3979 if (w
->must_be_updated_p
)
3981 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3983 /* Record that this is not a frame-based redisplay. */
3984 set_frame_matrix_frame (NULL
);
3986 #if PERIODIC_PREEMPTION_CHECKING
3987 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3990 double p
= XFLOATINT (Vredisplay_preemption_period
);
3994 usec
= (p
- sec
) * 1000000;
3996 EMACS_GET_TIME (tm
);
3997 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3998 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4004 update_window (w
, force_p
);
4007 /* Reset flag in W. */
4008 w
->must_be_updated_p
= 0;
4012 #ifdef HAVE_WINDOW_SYSTEM
4014 /* Redraw lines from the current matrix of window W that are
4015 overlapped by other rows. YB is bottom-most y-position in W. */
4018 redraw_overlapped_rows (w
, yb
)
4024 /* If rows overlapping others have been changed, the rows being
4025 overlapped have to be redrawn. This won't draw lines that have
4026 already been drawn in update_window_line because overlapped_p in
4027 desired rows is 0, so after row assignment overlapped_p in
4028 current rows is 0. */
4029 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4031 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4033 if (!row
->enabled_p
)
4035 else if (row
->mode_line_p
)
4038 if (row
->overlapped_p
)
4040 enum glyph_row_area area
;
4042 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4045 updated_area
= area
;
4046 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
4047 if (row
->used
[area
])
4048 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
4049 rif
->clear_end_of_line (-1);
4052 row
->overlapped_p
= 0;
4055 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4061 /* Redraw lines from the current matrix of window W that overlap
4062 others. YB is bottom-most y-position in W. */
4065 redraw_overlapping_rows (w
, yb
)
4070 struct glyph_row
*row
;
4072 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4074 row
= w
->current_matrix
->rows
+ i
;
4076 if (!row
->enabled_p
)
4078 else if (row
->mode_line_p
)
4081 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4083 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4087 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4088 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4089 overlaps
|= OVERLAPS_PRED
;
4090 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4091 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4092 overlaps
|= OVERLAPS_SUCC
;
4096 if (row
->used
[LEFT_MARGIN_AREA
])
4097 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4099 if (row
->used
[TEXT_AREA
])
4100 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4102 if (row
->used
[RIGHT_MARGIN_AREA
])
4103 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4105 /* Record in neighbour rows that ROW overwrites part of
4107 if (overlaps
& OVERLAPS_PRED
)
4108 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4109 if (overlaps
& OVERLAPS_SUCC
)
4110 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4119 #endif /* HAVE_WINDOW_SYSTEM */
4124 /* Check that no row in the current matrix of window W is enabled
4125 which is below what's displayed in the window. */
4128 check_current_matrix_flags (w
)
4131 int last_seen_p
= 0;
4132 int i
, yb
= window_text_bottom_y (w
);
4134 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4136 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4137 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4139 else if (last_seen_p
&& row
->enabled_p
)
4144 #endif /* GLYPH_DEBUG */
4147 /* Update display of window W. FORCE_P non-zero means that we should
4148 not stop when detecting pending input. */
4151 update_window (w
, force_p
)
4155 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4157 #if !PERIODIC_PREEMPTION_CHECKING
4158 int preempt_count
= baud_rate
/ 2400 + 1;
4160 extern int input_pending
;
4161 extern Lisp_Object do_mouse_tracking
;
4163 /* Check that W's frame doesn't have glyph matrices. */
4164 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4165 xassert (updating_frame
!= NULL
);
4168 /* Check pending input the first time so that we can quickly return. */
4169 if (redisplay_dont_pause
)
4171 #if PERIODIC_PREEMPTION_CHECKING
4172 else if (NILP (Vredisplay_preemption_period
))
4176 detect_input_pending_ignore_squeezables ();
4179 /* If forced to complete the update, or if no input is pending, do
4181 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4183 struct glyph_row
*row
, *end
;
4184 struct glyph_row
*mode_line_row
;
4185 struct glyph_row
*header_line_row
;
4186 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4188 rif
->update_window_begin_hook (w
);
4189 yb
= window_text_bottom_y (w
);
4191 /* If window has a header line, update it before everything else.
4192 Adjust y-positions of other rows by the header line height. */
4193 row
= desired_matrix
->rows
;
4194 end
= row
+ desired_matrix
->nrows
- 1;
4196 if (row
->mode_line_p
)
4198 header_line_row
= row
;
4202 header_line_row
= NULL
;
4204 /* Update the mode line, if necessary. */
4205 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4206 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4208 mode_line_row
->y
= yb
;
4209 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4211 &mouse_face_overwritten_p
);
4214 /* Find first enabled row. Optimizations in redisplay_internal
4215 may lead to an update with only one row enabled. There may
4216 be also completely empty matrices. */
4217 while (row
< end
&& !row
->enabled_p
)
4220 /* Try reusing part of the display by copying. */
4221 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4223 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4226 /* All rows were found to be equal. */
4232 /* We've scrolled the display. */
4238 /* Update the rest of the lines. */
4239 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4242 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4245 /* We'll have to play a little bit with when to
4246 detect_input_pending. If it's done too often,
4247 scrolling large windows with repeated scroll-up
4248 commands will too quickly pause redisplay. */
4249 #if PERIODIC_PREEMPTION_CHECKING
4253 EMACS_GET_TIME (tm
);
4254 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4255 if (EMACS_TIME_NEG_P (dif
))
4257 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4258 if (detect_input_pending_ignore_squeezables ())
4263 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4264 detect_input_pending_ignore_squeezables ();
4266 changed_p
|= update_window_line (w
, vpos
,
4267 &mouse_face_overwritten_p
);
4269 /* Mark all rows below the last visible one in the current
4270 matrix as invalid. This is necessary because of
4271 variable line heights. Consider the case of three
4272 successive redisplays, where the first displays 5
4273 lines, the second 3 lines, and the third 5 lines again.
4274 If the second redisplay wouldn't mark rows in the
4275 current matrix invalid, the third redisplay might be
4276 tempted to optimize redisplay based on lines displayed
4277 in the first redisplay. */
4278 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4279 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4280 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4283 /* Was display preempted? */
4284 paused_p
= row
< end
;
4288 /* Update the header line after scrolling because a new header
4289 line would otherwise overwrite lines at the top of the window
4290 that can be scrolled. */
4291 if (header_line_row
&& header_line_row
->enabled_p
)
4293 header_line_row
->y
= 0;
4294 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4297 /* Fix the appearance of overlapping/overlapped rows. */
4298 if (!paused_p
&& !w
->pseudo_window_p
)
4300 #ifdef HAVE_WINDOW_SYSTEM
4301 if (changed_p
&& rif
->fix_overlapping_area
)
4303 redraw_overlapped_rows (w
, yb
);
4304 redraw_overlapping_rows (w
, yb
);
4308 /* Make cursor visible at cursor position of W. */
4309 set_window_cursor_after_update (w
);
4311 #if 0 /* Check that current matrix invariants are satisfied. This is
4312 for debugging only. See the comment of check_matrix_invariants. */
4313 IF_DEBUG (check_matrix_invariants (w
));
4318 /* Remember the redisplay method used to display the matrix. */
4319 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4322 #ifdef HAVE_WINDOW_SYSTEM
4323 update_window_fringes (w
, 0);
4326 /* End the update of window W. Don't set the cursor if we
4327 paused updating the display because in this case,
4328 set_window_cursor_after_update hasn't been called, and
4329 output_cursor doesn't contain the cursor location. */
4330 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4336 /* check_current_matrix_flags (w); */
4337 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4340 clear_glyph_matrix (desired_matrix
);
4346 /* Update the display of area AREA in window W, row number VPOS.
4347 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4350 update_marginal_area (w
, area
, vpos
)
4354 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4356 /* Let functions in xterm.c know what area subsequent X positions
4357 will be relative to. */
4358 updated_area
= area
;
4360 /* Set cursor to start of glyphs, write them, and clear to the end
4361 of the area. I don't think that something more sophisticated is
4362 necessary here, since marginal areas will not be the default. */
4363 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4364 if (desired_row
->used
[area
])
4365 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4366 rif
->clear_end_of_line (-1);
4370 /* Update the display of the text area of row VPOS in window W.
4371 Value is non-zero if display has changed. */
4374 update_text_area (w
, vpos
)
4378 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4379 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4382 /* Let functions in xterm.c know what area subsequent X positions
4383 will be relative to. */
4384 updated_area
= TEXT_AREA
;
4386 /* If rows are at different X or Y, or rows have different height,
4387 or the current row is marked invalid, write the entire line. */
4388 if (!current_row
->enabled_p
4389 || desired_row
->y
!= current_row
->y
4390 || desired_row
->ascent
!= current_row
->ascent
4391 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4392 || desired_row
->phys_height
!= current_row
->phys_height
4393 || desired_row
->visible_height
!= current_row
->visible_height
4394 || current_row
->overlapped_p
4396 /* This causes excessive flickering when mouse is moved across
4397 the mode line. Luckily everything seems to work just fine
4398 without doing this. KFS 2006-09-17. */
4399 || current_row
->mouse_face_p
4401 || current_row
->x
!= desired_row
->x
)
4403 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4405 if (desired_row
->used
[TEXT_AREA
])
4406 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4407 desired_row
->used
[TEXT_AREA
]);
4409 /* Clear to end of window. */
4410 rif
->clear_end_of_line (-1);
4413 /* This erases the cursor. We do this here because
4414 notice_overwritten_cursor cannot easily check this, which
4415 might indicate that the whole functionality of
4416 notice_overwritten_cursor would better be implemented here.
4417 On the other hand, we need notice_overwritten_cursor as long
4418 as mouse highlighting is done asynchronously outside of
4420 if (vpos
== w
->phys_cursor
.vpos
)
4421 w
->phys_cursor_on_p
= 0;
4426 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4427 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4428 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4429 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4431 /* If the desired row extends its face to the text area end, and
4432 unless the current row also does so at the same position,
4433 make sure we write at least one glyph, so that the face
4434 extension actually takes place. */
4435 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4436 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4437 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4438 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4441 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4445 /* Loop over glyphs that current and desired row may have
4451 /* Skip over glyphs that both rows have in common. These
4452 don't have to be written. We can't skip if the last
4453 current glyph overlaps the glyph to its right. For
4454 example, consider a current row of `if ' with the `f' in
4455 Courier bold so that it overlaps the ` ' to its right.
4456 If the desired row is ` ', we would skip over the space
4457 after the `if' and there would remain a pixel from the
4458 `f' on the screen. */
4459 if (overlapping_glyphs_p
&& i
> 0)
4461 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4464 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4466 can_skip_p
= right
== 0;
4472 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4474 x
+= desired_glyph
->pixel_width
;
4475 ++desired_glyph
, ++current_glyph
, ++i
;
4478 /* Consider the case that the current row contains "xxx
4479 ppp ggg" in italic Courier font, and the desired row
4480 is "xxx ggg". The character `p' has lbearing, `g'
4481 has not. The loop above will stop in front of the
4482 first `p' in the current row. If we would start
4483 writing glyphs there, we wouldn't erase the lbearing
4484 of the `p'. The rest of the lbearing problem is then
4485 taken care of by draw_glyphs. */
4486 if (overlapping_glyphs_p
4488 && i
< current_row
->used
[TEXT_AREA
]
4489 && (current_row
->used
[TEXT_AREA
]
4490 != desired_row
->used
[TEXT_AREA
]))
4494 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4496 while (left
> 0 && i
> 0)
4498 --i
, --desired_glyph
, --current_glyph
;
4499 x
-= desired_glyph
->pixel_width
;
4500 left
-= desired_glyph
->pixel_width
;
4505 /* Try to avoid writing the entire rest of the desired row
4506 by looking for a resync point. This mainly prevents
4507 mode line flickering in the case the mode line is in
4508 fixed-pitch font, which it usually will be. */
4509 if (i
< desired_row
->used
[TEXT_AREA
])
4511 int start_x
= x
, start_hpos
= i
;
4512 struct glyph
*start
= desired_glyph
;
4514 int skip_first_p
= !can_skip_p
;
4516 /* Find the next glyph that's equal again. */
4519 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4522 x
+= desired_glyph
->pixel_width
;
4523 current_x
+= current_glyph
->pixel_width
;
4524 ++desired_glyph
, ++current_glyph
, ++i
;
4528 if (i
== start_hpos
|| x
!= current_x
)
4532 desired_glyph
= start
;
4536 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4537 rif
->write_glyphs (start
, i
- start_hpos
);
4542 /* Write the rest. */
4543 if (i
< desired_row
->used
[TEXT_AREA
])
4545 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4546 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4550 /* Maybe clear to end of line. */
4551 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4553 /* If new row extends to the end of the text area, nothing
4554 has to be cleared, if and only if we did a write_glyphs
4555 above. This is made sure by setting desired_stop_pos
4556 appropriately above. */
4557 xassert (i
< desired_row
->used
[TEXT_AREA
]
4558 || ((desired_row
->used
[TEXT_AREA
]
4559 == current_row
->used
[TEXT_AREA
])
4560 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4562 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4564 /* If old row extends to the end of the text area, clear. */
4565 if (i
>= desired_row
->used
[TEXT_AREA
])
4566 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4567 desired_row
->pixel_width
);
4568 rif
->clear_end_of_line (-1);
4571 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4573 /* Otherwise clear to the end of the old row. Everything
4574 after that position should be clear already. */
4577 if (i
>= desired_row
->used
[TEXT_AREA
])
4578 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4579 desired_row
->pixel_width
);
4581 /* If cursor is displayed at the end of the line, make sure
4582 it's cleared. Nowadays we don't have a phys_cursor_glyph
4583 with which to erase the cursor (because this method
4584 doesn't work with lbearing/rbearing), so we must do it
4586 if (vpos
== w
->phys_cursor
.vpos
4587 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4589 w
->phys_cursor_on_p
= 0;
4593 x
= current_row
->pixel_width
;
4594 rif
->clear_end_of_line (x
);
4603 /* Update row VPOS in window W. Value is non-zero if display has been
4607 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4609 int vpos
, *mouse_face_overwritten_p
;
4611 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4612 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4615 /* Set the row being updated. This is important to let xterm.c
4616 know what line height values are in effect. */
4617 updated_row
= desired_row
;
4619 /* A row can be completely invisible in case a desired matrix was
4620 built with a vscroll and then make_cursor_line_fully_visible shifts
4621 the matrix. Make sure to make such rows current anyway, since
4622 we need the correct y-position, for example, in the current matrix. */
4623 if (desired_row
->mode_line_p
4624 || desired_row
->visible_height
> 0)
4626 xassert (desired_row
->enabled_p
);
4628 /* Update display of the left margin area, if there is one. */
4629 if (!desired_row
->full_width_p
4630 && !NILP (w
->left_margin_cols
))
4633 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4636 /* Update the display of the text area. */
4637 if (update_text_area (w
, vpos
))
4640 if (current_row
->mouse_face_p
)
4641 *mouse_face_overwritten_p
= 1;
4644 /* Update display of the right margin area, if there is one. */
4645 if (!desired_row
->full_width_p
4646 && !NILP (w
->right_margin_cols
))
4649 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4652 /* Draw truncation marks etc. */
4653 if (!current_row
->enabled_p
4654 || desired_row
->y
!= current_row
->y
4655 || desired_row
->visible_height
!= current_row
->visible_height
4656 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4657 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4658 || current_row
->redraw_fringe_bitmaps_p
4659 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4660 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4661 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4662 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4663 rif
->after_update_window_line_hook (desired_row
);
4666 /* Update current_row from desired_row. */
4667 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4673 /* Set the cursor after an update of window W. This function may only
4674 be called from update_window. */
4677 set_window_cursor_after_update (w
)
4680 struct frame
*f
= XFRAME (w
->frame
);
4681 int cx
, cy
, vpos
, hpos
;
4683 /* Not intended for frame matrix updates. */
4684 xassert (FRAME_WINDOW_P (f
));
4686 if (cursor_in_echo_area
4687 && !NILP (echo_area_buffer
[0])
4688 /* If we are showing a message instead of the mini-buffer,
4689 show the cursor for the message instead. */
4690 && XWINDOW (minibuf_window
) == w
4691 && EQ (minibuf_window
, echo_area_window
)
4692 /* These cases apply only to the frame that contains
4693 the active mini-buffer window. */
4694 && FRAME_HAS_MINIBUF_P (f
)
4695 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4697 cx
= cy
= vpos
= hpos
= 0;
4699 if (cursor_in_echo_area
>= 0)
4701 /* If the mini-buffer is several lines high, find the last
4702 line that has any text on it. Note: either all lines
4703 are enabled or none. Otherwise we wouldn't be able to
4705 struct glyph_row
*row
, *last_row
;
4706 struct glyph
*glyph
;
4707 int yb
= window_text_bottom_y (w
);
4710 row
= w
->current_matrix
->rows
;
4711 while (row
->enabled_p
4712 && (last_row
== NULL
4713 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4715 if (row
->used
[TEXT_AREA
]
4716 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4723 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4724 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4726 while (last
> start
&& last
->charpos
< 0)
4729 for (glyph
= start
; glyph
< last
; ++glyph
)
4731 cx
+= glyph
->pixel_width
;
4736 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4744 hpos
= w
->cursor
.hpos
;
4745 vpos
= w
->cursor
.vpos
;
4748 /* Window cursor can be out of sync for horizontally split windows. */
4749 hpos
= max (0, hpos
);
4750 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4751 vpos
= max (0, vpos
);
4752 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4753 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4757 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4758 tree rooted at W. */
4761 set_window_update_flags (w
, on_p
)
4767 if (!NILP (w
->hchild
))
4768 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4769 else if (!NILP (w
->vchild
))
4770 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4772 w
->must_be_updated_p
= on_p
;
4774 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4780 /***********************************************************************
4781 Window-Based Scrolling
4782 ***********************************************************************/
4784 /* Structure describing rows in scrolling_window. */
4788 /* Number of occurrences of this row in desired and current matrix. */
4789 int old_uses
, new_uses
;
4791 /* Vpos of row in new matrix. */
4792 int new_line_number
;
4794 /* Bucket index of this row_entry in the hash table row_table. */
4797 /* The row described by this entry. */
4798 struct glyph_row
*row
;
4800 /* Hash collision chain. */
4801 struct row_entry
*next
;
4804 /* A pool to allocate row_entry structures from, and the size of the
4805 pool. The pool is reallocated in scrolling_window when we find
4806 that we need a larger one. */
4808 static struct row_entry
*row_entry_pool
;
4809 static int row_entry_pool_size
;
4811 /* Index of next free entry in row_entry_pool. */
4813 static int row_entry_idx
;
4815 /* The hash table used during scrolling, and the table's size. This
4816 table is used to quickly identify equal rows in the desired and
4819 static struct row_entry
**row_table
;
4820 static int row_table_size
;
4822 /* Vectors of pointers to row_entry structures belonging to the
4823 current and desired matrix, and the size of the vectors. */
4825 static struct row_entry
**old_lines
, **new_lines
;
4826 static int old_lines_size
, new_lines_size
;
4828 /* A pool to allocate run structures from, and its size. */
4830 static struct run
*run_pool
;
4831 static int runs_size
;
4833 /* A vector of runs of lines found during scrolling. */
4835 static struct run
**runs
;
4837 /* Add glyph row ROW to the scrolling hash table during the scrolling
4840 static INLINE
struct row_entry
*
4841 add_row_entry (w
, row
)
4843 struct glyph_row
*row
;
4845 struct row_entry
*entry
;
4846 int i
= row
->hash
% row_table_size
;
4848 entry
= row_table
[i
];
4849 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4850 entry
= entry
->next
;
4854 entry
= row_entry_pool
+ row_entry_idx
++;
4856 entry
->old_uses
= entry
->new_uses
= 0;
4857 entry
->new_line_number
= 0;
4859 entry
->next
= row_table
[i
];
4860 row_table
[i
] = entry
;
4867 /* Try to reuse part of the current display of W by scrolling lines.
4868 HEADER_LINE_P non-zero means W has a header line.
4870 The algorithm is taken from Communications of the ACM, Apr78 "A
4871 Technique for Isolating Differences Between Files." It should take
4874 A short outline of the steps of the algorithm
4876 1. Skip lines equal at the start and end of both matrices.
4878 2. Enter rows in the current and desired matrix into a symbol
4879 table, counting how often they appear in both matrices.
4881 3. Rows that appear exactly once in both matrices serve as anchors,
4882 i.e. we assume that such lines are likely to have been moved.
4884 4. Starting from anchor lines, extend regions to be scrolled both
4885 forward and backward.
4889 -1 if all rows were found to be equal.
4890 0 to indicate that we did not scroll the display, or
4891 1 if we did scroll. */
4894 scrolling_window (w
, header_line_p
)
4898 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4899 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4900 int yb
= window_text_bottom_y (w
);
4901 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4902 int nruns
, nbytes
, n
, run_idx
;
4903 struct row_entry
*entry
;
4905 /* Skip over rows equal at the start. */
4906 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4908 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4909 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4913 && !d
->redraw_fringe_bitmaps_p
4915 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4916 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4917 && row_equal_p (w
, c
, d
, 1))
4926 /* Give up if some rows in the desired matrix are not enabled. */
4927 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4930 first_old
= first_new
= i
;
4932 /* Set last_new to the index + 1 of the last enabled row in the
4935 while (i
< desired_matrix
->nrows
- 1
4936 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4937 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4940 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4945 /* Set last_old to the index + 1 of the last enabled row in the
4946 current matrix. We don't look at the enabled flag here because
4947 we plan to reuse part of the display even if other parts are
4950 while (i
< current_matrix
->nrows
- 1)
4952 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4961 /* Skip over rows equal at the bottom. */
4964 while (i
- 1 > first_new
4965 && j
- 1 > first_old
4966 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4967 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4968 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4969 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4971 MATRIX_ROW (desired_matrix
, i
- 1),
4972 MATRIX_ROW (current_matrix
, j
- 1), 1))
4977 /* Nothing to do if all rows are equal. */
4978 if (last_new
== first_new
)
4981 /* Reallocate vectors, tables etc. if necessary. */
4983 if (current_matrix
->nrows
> old_lines_size
)
4985 old_lines_size
= current_matrix
->nrows
;
4986 nbytes
= old_lines_size
* sizeof *old_lines
;
4987 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4990 if (desired_matrix
->nrows
> new_lines_size
)
4992 new_lines_size
= desired_matrix
->nrows
;
4993 nbytes
= new_lines_size
* sizeof *new_lines
;
4994 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4997 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4998 if (3 * n
> row_table_size
)
5000 row_table_size
= next_almost_prime (3 * n
);
5001 nbytes
= row_table_size
* sizeof *row_table
;
5002 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5003 bzero (row_table
, nbytes
);
5006 if (n
> row_entry_pool_size
)
5008 row_entry_pool_size
= n
;
5009 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5010 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5013 if (desired_matrix
->nrows
> runs_size
)
5015 runs_size
= desired_matrix
->nrows
;
5016 nbytes
= runs_size
* sizeof *runs
;
5017 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5018 nbytes
= runs_size
* sizeof *run_pool
;
5019 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5022 nruns
= run_idx
= 0;
5025 /* Add rows from the current and desired matrix to the hash table
5026 row_hash_table to be able to find equal ones quickly. */
5028 for (i
= first_old
; i
< last_old
; ++i
)
5030 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5032 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5033 old_lines
[i
] = entry
;
5037 old_lines
[i
] = NULL
;
5040 for (i
= first_new
; i
< last_new
; ++i
)
5042 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5043 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5045 entry
->new_line_number
= i
;
5046 new_lines
[i
] = entry
;
5049 /* Identify moves based on lines that are unique and equal
5050 in both matrices. */
5051 for (i
= first_old
; i
< last_old
;)
5053 && old_lines
[i
]->old_uses
== 1
5054 && old_lines
[i
]->new_uses
== 1)
5057 int new_line
= old_lines
[i
]->new_line_number
;
5058 struct run
*run
= run_pool
+ run_idx
++;
5061 run
->current_vpos
= i
;
5062 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5063 run
->desired_vpos
= new_line
;
5064 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5066 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5068 /* Extend backward. */
5071 while (j
> first_old
5073 && old_lines
[j
] == new_lines
[k
])
5075 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5076 --run
->current_vpos
;
5077 --run
->desired_vpos
;
5080 run
->desired_y
-= h
;
5081 run
->current_y
-= h
;
5085 /* Extend forward. */
5090 && old_lines
[j
] == new_lines
[k
])
5092 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5098 /* Insert run into list of all runs. Order runs by copied
5099 pixel lines. Note that we record runs that don't have to
5100 be copied because they are already in place. This is done
5101 because we can avoid calling update_window_line in this
5103 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5105 for (k
= nruns
; k
> j
; --k
)
5106 runs
[k
] = runs
[k
- 1];
5115 /* Do the moves. Do it in a way that we don't overwrite something
5116 we want to copy later on. This is not solvable in general
5117 because there is only one display and we don't have a way to
5118 exchange areas on this display. Example:
5120 +-----------+ +-----------+
5122 +-----------+ --> +-----------+
5124 +-----------+ +-----------+
5126 Instead, prefer bigger moves, and invalidate moves that would
5127 copy from where we copied to. */
5129 for (i
= 0; i
< nruns
; ++i
)
5130 if (runs
[i
]->nrows
> 0)
5132 struct run
*r
= runs
[i
];
5134 /* Copy on the display. */
5135 if (r
->current_y
!= r
->desired_y
)
5137 rif
->scroll_run_hook (w
, r
);
5139 /* Invalidate runs that copy from where we copied to. */
5140 for (j
= i
+ 1; j
< nruns
; ++j
)
5142 struct run
*p
= runs
[j
];
5144 if ((p
->current_y
>= r
->desired_y
5145 && p
->current_y
< r
->desired_y
+ r
->height
)
5146 || (p
->current_y
+ p
->height
>= r
->desired_y
5147 && (p
->current_y
+ p
->height
5148 < r
->desired_y
+ r
->height
)))
5153 /* Assign matrix rows. */
5154 for (j
= 0; j
< r
->nrows
; ++j
)
5156 struct glyph_row
*from
, *to
;
5157 int to_overlapped_p
;
5159 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5160 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5161 to_overlapped_p
= to
->overlapped_p
;
5162 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5163 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5164 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5165 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5166 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5167 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5168 from
->redraw_fringe_bitmaps_p
= 1;
5169 assign_row (to
, from
);
5170 to
->enabled_p
= 1, from
->enabled_p
= 0;
5171 to
->overlapped_p
= to_overlapped_p
;
5175 /* Clear the hash table, for the next time. */
5176 for (i
= 0; i
< row_entry_idx
; ++i
)
5177 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5179 /* Value is > 0 to indicate that we scrolled the display. */
5185 /************************************************************************
5187 ************************************************************************/
5189 /* Update the desired frame matrix of frame F.
5191 FORCE_P non-zero means that the update should not be stopped by
5192 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5193 should not be tried.
5195 Value is non-zero if update was stopped due to pending input. */
5198 update_frame_1 (f
, force_p
, inhibit_id_p
)
5203 /* Frame matrices to work on. */
5204 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5205 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5208 int preempt_count
= baud_rate
/ 2400 + 1;
5209 extern int input_pending
;
5211 xassert (current_matrix
&& desired_matrix
);
5213 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5214 calculate_costs (f
);
5216 if (preempt_count
<= 0)
5219 if (redisplay_dont_pause
)
5221 #if PERIODIC_PREEMPTION_CHECKING
5222 else if (NILP (Vredisplay_preemption_period
))
5225 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5232 /* If we cannot insert/delete lines, it's no use trying it. */
5233 if (!line_ins_del_ok
)
5236 /* See if any of the desired lines are enabled; don't compute for
5237 i/d line if just want cursor motion. */
5238 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5239 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5242 /* Try doing i/d line, if not yet inhibited. */
5243 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5244 force_p
|= scrolling (f
);
5246 /* Update the individual lines as needed. Do bottom line first. */
5247 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5248 update_frame_line (f
, desired_matrix
->nrows
- 1);
5250 /* Now update the rest of the lines. */
5251 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5253 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5255 if (FRAME_TERMCAP_P (f
))
5257 /* Flush out every so many lines.
5258 Also flush out if likely to have more than 1k buffered
5259 otherwise. I'm told that some telnet connections get
5260 really screwed by more than 1k output at once. */
5261 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5263 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5266 if (preempt_count
== 1)
5268 #ifdef EMACS_OUTQSIZE
5269 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5270 /* Probably not a tty. Ignore the error and reset
5272 outq
= PENDING_OUTPUT_COUNT (stdout
);
5275 if (baud_rate
<= outq
&& baud_rate
> 0)
5276 sleep (outq
/ baud_rate
);
5281 #if PERIODIC_PREEMPTION_CHECKING
5285 EMACS_GET_TIME (tm
);
5286 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5287 if (EMACS_TIME_NEG_P (dif
))
5289 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5290 if (detect_input_pending_ignore_squeezables ())
5295 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5296 detect_input_pending_ignore_squeezables ();
5299 update_frame_line (f
, i
);
5303 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5305 /* Now just clean up termcap drivers and set cursor, etc. */
5308 if ((cursor_in_echo_area
5309 /* If we are showing a message instead of the mini-buffer,
5310 show the cursor for the message instead of for the
5311 (now hidden) mini-buffer contents. */
5312 || (EQ (minibuf_window
, selected_window
)
5313 && EQ (minibuf_window
, echo_area_window
)
5314 && !NILP (echo_area_buffer
[0])))
5315 /* These cases apply only to the frame that contains
5316 the active mini-buffer window. */
5317 && FRAME_HAS_MINIBUF_P (f
)
5318 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5320 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5323 if (cursor_in_echo_area
< 0)
5325 /* Negative value of cursor_in_echo_area means put
5326 cursor at beginning of line. */
5332 /* Positive value of cursor_in_echo_area means put
5333 cursor at the end of the prompt. If the mini-buffer
5334 is several lines high, find the last line that has
5336 row
= FRAME_LINES (f
);
5342 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5344 /* Frame rows are filled up with spaces that
5345 must be ignored here. */
5346 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5348 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5349 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5352 && (last
- 1)->charpos
< 0)
5358 while (row
> top
&& col
== 0);
5360 /* Make sure COL is not out of range. */
5361 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5363 /* If we have another row, advance cursor into it. */
5364 if (row
< FRAME_LINES (f
) - 1)
5366 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5369 /* Otherwise move it back in range. */
5371 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5375 cursor_to (row
, col
);
5379 /* We have only one cursor on terminal frames. Use it to
5380 display the cursor of the selected window. */
5381 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5382 if (w
->cursor
.vpos
>= 0
5383 /* The cursor vpos may be temporarily out of bounds
5384 in the following situation: There is one window,
5385 with the cursor in the lower half of it. The window
5386 is split, and a message causes a redisplay before
5387 a new cursor position has been computed. */
5388 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5390 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5391 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5393 if (INTEGERP (w
->left_margin_cols
))
5394 x
+= XFASTINT (w
->left_margin_cols
);
5396 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5404 clear_desired_matrices (f
);
5409 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5413 struct frame
*frame
;
5415 int unchanged_at_top
, unchanged_at_bottom
;
5418 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5419 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5420 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5421 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5423 int free_at_end_vpos
= FRAME_LINES (frame
);
5424 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5425 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5427 if (!current_matrix
)
5430 /* Compute hash codes of all the lines. Also calculate number of
5431 changed lines, number of unchanged lines at the beginning, and
5432 number of unchanged lines at the end. */
5434 unchanged_at_top
= 0;
5435 unchanged_at_bottom
= FRAME_LINES (frame
);
5436 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5438 /* Give up on this scrolling if some old lines are not enabled. */
5439 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5441 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5442 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5444 /* This line cannot be redrawn, so don't let scrolling mess it. */
5445 new_hash
[i
] = old_hash
[i
];
5446 #define INFINITY 1000000 /* Taken from scroll.c */
5447 draw_cost
[i
] = INFINITY
;
5451 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5452 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5455 if (old_hash
[i
] != new_hash
[i
])
5458 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5460 else if (i
== unchanged_at_top
)
5462 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5465 /* If changed lines are few, don't allow preemption, don't scroll. */
5466 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5467 || unchanged_at_bottom
== FRAME_LINES (frame
))
5470 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5471 - unchanged_at_bottom
);
5473 if (scroll_region_ok
)
5474 free_at_end_vpos
-= unchanged_at_bottom
;
5475 else if (memory_below_frame
)
5476 free_at_end_vpos
= -1;
5478 /* If large window, fast terminal and few lines in common between
5479 current frame and desired frame, don't bother with i/d calc. */
5480 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5482 10 * scrolling_max_lines_saved (unchanged_at_top
,
5483 FRAME_LINES (frame
) - unchanged_at_bottom
,
5484 old_hash
, new_hash
, draw_cost
)))
5487 if (window_size
< 2)
5490 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5491 draw_cost
+ unchanged_at_top
- 1,
5492 old_draw_cost
+ unchanged_at_top
- 1,
5493 old_hash
+ unchanged_at_top
- 1,
5494 new_hash
+ unchanged_at_top
- 1,
5495 free_at_end_vpos
- unchanged_at_top
);
5501 /* Count the number of blanks at the start of the vector of glyphs R
5502 which is LEN glyphs long. */
5505 count_blanks (r
, len
)
5511 for (i
= 0; i
< len
; ++i
)
5512 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5519 /* Count the number of glyphs in common at the start of the glyph
5520 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5521 of STR2. Value is the number of equal glyphs equal at the start. */
5524 count_match (str1
, end1
, str2
, end2
)
5525 struct glyph
*str1
, *end1
, *str2
, *end2
;
5527 struct glyph
*p1
= str1
;
5528 struct glyph
*p2
= str2
;
5532 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5539 /* Char insertion/deletion cost vector, from term.c */
5541 extern int *char_ins_del_vector
;
5542 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5545 /* Perform a frame-based update on line VPOS in frame FRAME. */
5548 update_frame_line (f
, vpos
)
5552 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5554 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5555 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5556 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5557 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5558 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5559 int must_write_whole_line_p
;
5560 int write_spaces_p
= must_write_spaces
;
5561 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5562 != FACE_TTY_DEFAULT_BG_COLOR
);
5564 if (colored_spaces_p
)
5567 /* Current row not enabled means it has unknown contents. We must
5568 write the whole desired line in that case. */
5569 must_write_whole_line_p
= !current_row
->enabled_p
;
5570 if (must_write_whole_line_p
)
5577 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5578 olen
= current_row
->used
[TEXT_AREA
];
5580 /* Ignore trailing spaces, if we can. */
5581 if (!write_spaces_p
)
5582 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5586 current_row
->enabled_p
= 1;
5587 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5589 /* If desired line is empty, just clear the line. */
5590 if (!desired_row
->enabled_p
)
5596 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5597 nlen
= desired_row
->used
[TEXT_AREA
];
5598 nend
= nbody
+ nlen
;
5600 /* If display line has unknown contents, write the whole line. */
5601 if (must_write_whole_line_p
)
5603 /* Ignore spaces at the end, if we can. */
5604 if (!write_spaces_p
)
5605 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5608 /* Write the contents of the desired line. */
5611 cursor_to (vpos
, 0);
5612 write_glyphs (nbody
, nlen
);
5615 /* Don't call clear_end_of_line if we already wrote the whole
5616 line. The cursor will not be at the right margin in that
5617 case but in the line below. */
5618 if (nlen
< FRAME_TOTAL_COLS (f
))
5620 cursor_to (vpos
, nlen
);
5621 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5624 /* Make sure we are in the right row, otherwise cursor movement
5625 with cmgoto might use `ch' in the wrong row. */
5626 cursor_to (vpos
, 0);
5628 make_current (desired_matrix
, current_matrix
, vpos
);
5632 /* Pretend trailing spaces are not there at all,
5633 unless for one reason or another we must write all spaces. */
5634 if (!write_spaces_p
)
5635 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5638 /* If there's no i/d char, quickly do the best we can without it. */
5639 if (!char_ins_del_ok
)
5643 /* Find the first glyph in desired row that doesn't agree with
5644 a glyph in the current row, and write the rest from there on. */
5645 for (i
= 0; i
< nlen
; i
++)
5647 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5649 /* Find the end of the run of different glyphs. */
5653 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5654 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5657 /* Output this run of non-matching chars. */
5658 cursor_to (vpos
, i
);
5659 write_glyphs (nbody
+ i
, j
- i
);
5662 /* Now find the next non-match. */
5666 /* Clear the rest of the line, or the non-clear part of it. */
5669 cursor_to (vpos
, nlen
);
5670 clear_end_of_line (olen
);
5673 /* Make current row = desired row. */
5674 make_current (desired_matrix
, current_matrix
, vpos
);
5678 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5679 characters in a row. */
5683 /* If current line is blank, skip over initial spaces, if
5684 possible, and write the rest. */
5688 nsp
= count_blanks (nbody
, nlen
);
5692 cursor_to (vpos
, nsp
);
5693 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5696 /* Exchange contents between current_frame and new_frame. */
5697 make_current (desired_matrix
, current_matrix
, vpos
);
5701 /* Compute number of leading blanks in old and new contents. */
5702 osp
= count_blanks (obody
, olen
);
5703 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5705 /* Compute number of matching chars starting with first non-blank. */
5706 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5707 nbody
+ nsp
, nbody
+ nlen
);
5709 /* Spaces in new match implicit space past the end of old. */
5710 /* A bug causing this to be a no-op was fixed in 18.29. */
5711 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5714 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5718 /* Avoid doing insert/delete char
5719 just cause number of leading spaces differs
5720 when the following text does not match. */
5721 if (begmatch
== 0 && osp
!= nsp
)
5722 osp
= nsp
= min (osp
, nsp
);
5724 /* Find matching characters at end of line */
5727 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5729 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5734 endmatch
= obody
+ olen
- op1
;
5736 /* tem gets the distance to insert or delete.
5737 endmatch is how many characters we save by doing so.
5740 tem
= (nlen
- nsp
) - (olen
- osp
);
5742 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5745 /* nsp - osp is the distance to insert or delete.
5746 If that is nonzero, begmatch is known to be nonzero also.
5747 begmatch + endmatch is how much we save by doing the ins/del.
5751 && (!char_ins_del_ok
5752 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5756 osp
= nsp
= min (osp
, nsp
);
5759 /* Now go through the line, inserting, writing and
5760 deleting as appropriate. */
5764 cursor_to (vpos
, nsp
);
5765 delete_glyphs (osp
- nsp
);
5769 /* If going to delete chars later in line
5770 and insert earlier in the line,
5771 must delete first to avoid losing data in the insert */
5772 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5774 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5775 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5776 olen
= nlen
- (nsp
- osp
);
5778 cursor_to (vpos
, osp
);
5779 insert_glyphs (0, nsp
- osp
);
5783 tem
= nsp
+ begmatch
+ endmatch
;
5784 if (nlen
!= tem
|| olen
!= tem
)
5786 if (!endmatch
|| nlen
== olen
)
5788 /* If new text being written reaches right margin, there is
5789 no need to do clear-to-eol at the end of this function
5790 (and it would not be safe, since cursor is not going to
5791 be "at the margin" after the text is done). */
5792 if (nlen
== FRAME_TOTAL_COLS (f
))
5795 /* Function write_glyphs is prepared to do nothing
5796 if passed a length <= 0. Check it here to avoid
5797 unnecessary cursor movement. */
5800 cursor_to (vpos
, nsp
+ begmatch
);
5801 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5804 else if (nlen
> olen
)
5806 /* Here, we used to have the following simple code:
5807 ----------------------------------------
5808 write_glyphs (nbody + nsp + begmatch, olen - tem);
5809 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5810 ----------------------------------------
5811 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5812 is a padding glyph. */
5813 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5816 cursor_to (vpos
, nsp
+ begmatch
);
5818 /* Calculate columns we can actually overwrite. */
5819 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5821 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5823 /* If we left columns to be overwritten, we must delete them. */
5824 del
= olen
- tem
- out
;
5826 delete_glyphs (del
);
5828 /* At last, we insert columns not yet written out. */
5829 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5832 else if (olen
> nlen
)
5834 cursor_to (vpos
, nsp
+ begmatch
);
5835 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5836 delete_glyphs (olen
- nlen
);
5842 /* If any unerased characters remain after the new line, erase them. */
5845 cursor_to (vpos
, nlen
);
5846 clear_end_of_line (olen
);
5849 /* Exchange contents between current_frame and new_frame. */
5850 make_current (desired_matrix
, current_matrix
, vpos
);
5855 /***********************************************************************
5856 X/Y Position -> Buffer Position
5857 ***********************************************************************/
5859 /* Determine what's under window-relative pixel position (*X, *Y).
5860 Return the object (string or buffer) that's there.
5861 Return in *POS the position in that object.
5862 Adjust *X and *Y to character positions. */
5865 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5868 struct display_pos
*pos
;
5869 Lisp_Object
*object
;
5871 int *width
, *height
;
5874 struct buffer
*old_current_buffer
= current_buffer
;
5875 struct text_pos startp
;
5877 struct glyph_row
*row
;
5878 #ifdef HAVE_WINDOW_SYSTEM
5879 struct image
*img
= 0;
5883 current_buffer
= XBUFFER (w
->buffer
);
5884 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5885 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5886 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5887 start_display (&it
, w
, startp
);
5889 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5890 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5891 MOVE_TO_X
| MOVE_TO_Y
);
5893 current_buffer
= old_current_buffer
;
5895 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5896 *dy
= *y
- it
.current_y
;
5899 if (STRINGP (it
.string
))
5903 #ifdef HAVE_WINDOW_SYSTEM
5904 if (it
.what
== IT_IMAGE
)
5906 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5907 && !NILP (img
->spec
))
5908 *object
= img
->spec
;
5912 if (it
.vpos
< w
->current_matrix
->nrows
5913 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5916 if (it
.hpos
< row
->used
[TEXT_AREA
])
5918 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5919 #ifdef HAVE_WINDOW_SYSTEM
5922 *dy
-= row
->ascent
- glyph
->ascent
;
5923 *dx
+= glyph
->slice
.x
;
5924 *dy
+= glyph
->slice
.y
;
5925 /* Image slices positions are still relative to the entire image */
5926 *width
= img
->width
;
5927 *height
= img
->height
;
5932 *width
= glyph
->pixel_width
;
5933 *height
= glyph
->ascent
+ glyph
->descent
;
5939 *height
= row
->height
;
5944 *width
= *height
= 0;
5947 /* Add extra (default width) columns if clicked after EOL. */
5948 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5950 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5959 /* Value is the string under window-relative coordinates X/Y in the
5960 mode line or header line (PART says which) of window W, or nil if none.
5961 *CHARPOS is set to the position in the string returned. */
5964 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5966 enum window_part part
;
5969 Lisp_Object
*object
;
5971 int *width
, *height
;
5973 struct glyph_row
*row
;
5974 struct glyph
*glyph
, *end
;
5976 Lisp_Object string
= Qnil
;
5978 if (part
== ON_MODE_LINE
)
5979 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5981 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5983 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5985 if (row
->mode_line_p
&& row
->enabled_p
)
5987 /* Find the glyph under X. If we find one with a string object,
5988 it's the one we were looking for. */
5989 glyph
= row
->glyphs
[TEXT_AREA
];
5990 end
= glyph
+ row
->used
[TEXT_AREA
];
5991 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5992 x0
-= glyph
->pixel_width
;
5993 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5996 string
= glyph
->object
;
5997 *charpos
= glyph
->charpos
;
5998 *width
= glyph
->pixel_width
;
5999 *height
= glyph
->ascent
+ glyph
->descent
;
6000 #ifdef HAVE_WINDOW_SYSTEM
6001 if (glyph
->type
== IMAGE_GLYPH
)
6004 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6006 *object
= img
->spec
;
6007 y0
-= row
->ascent
- glyph
->ascent
;
6013 /* Add extra (default width) columns if clicked after EOL. */
6014 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6016 *height
= row
->height
;
6023 *width
= *height
= 0;
6033 /* Value is the string under window-relative coordinates X/Y in either
6034 marginal area, or nil if none. *CHARPOS is set to the position in
6035 the string returned. */
6038 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6040 enum window_part part
;
6043 Lisp_Object
*object
;
6045 int *width
, *height
;
6047 struct glyph_row
*row
= w
->current_matrix
->rows
;
6048 struct glyph
*glyph
, *end
;
6049 int x0
, y0
, i
, wy
= *y
;
6051 Lisp_Object string
= Qnil
;
6053 if (part
== ON_LEFT_MARGIN
)
6054 area
= LEFT_MARGIN_AREA
;
6055 else if (part
== ON_RIGHT_MARGIN
)
6056 area
= RIGHT_MARGIN_AREA
;
6060 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6061 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6064 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6068 /* Find the glyph under X. If we find one with a string object,
6069 it's the one we were looking for. */
6070 if (area
== RIGHT_MARGIN_AREA
)
6071 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6072 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6073 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6074 + window_box_width (w
, LEFT_MARGIN_AREA
)
6075 + window_box_width (w
, TEXT_AREA
));
6077 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6078 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6081 glyph
= row
->glyphs
[area
];
6082 end
= glyph
+ row
->used
[area
];
6083 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6084 x0
-= glyph
->pixel_width
;
6085 *x
= glyph
- row
->glyphs
[area
];
6088 string
= glyph
->object
;
6089 *charpos
= glyph
->charpos
;
6090 *width
= glyph
->pixel_width
;
6091 *height
= glyph
->ascent
+ glyph
->descent
;
6092 #ifdef HAVE_WINDOW_SYSTEM
6093 if (glyph
->type
== IMAGE_GLYPH
)
6096 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6098 *object
= img
->spec
;
6099 y0
-= row
->ascent
- glyph
->ascent
;
6100 x0
+= glyph
->slice
.x
;
6101 y0
+= glyph
->slice
.y
;
6107 /* Add extra (default width) columns if clicked after EOL. */
6108 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6110 *height
= row
->height
;
6117 *width
= *height
= 0;
6127 /***********************************************************************
6128 Changing Frame Sizes
6129 ***********************************************************************/
6134 window_change_signal (signalnum
) /* If we don't have an argument, */
6135 int signalnum
; /* some compilers complain in signal calls. */
6141 int old_errno
= errno
;
6143 signal (SIGWINCH
, window_change_signal
);
6144 SIGNAL_THREAD_CHECK (signalnum
);
6146 get_frame_size (&width
, &height
);
6148 /* The frame size change obviously applies to a termcap-controlled
6149 frame. Find such a frame in the list, and assume it's the only
6150 one (since the redisplay code always writes to stdout, not a
6151 FILE * specified in the frame structure). Record the new size,
6152 but don't reallocate the data structures now. Let that be done
6153 later outside of the signal handler. */
6156 Lisp_Object tail
, frame
;
6158 FOR_EACH_FRAME (tail
, frame
)
6160 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6162 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6170 #endif /* SIGWINCH */
6173 /* Do any change in frame size that was requested by a signal. SAFE
6174 non-zero means this function is called from a place where it is
6175 safe to change frame sizes while a redisplay is in progress. */
6178 do_pending_window_change (safe
)
6181 /* If window_change_signal should have run before, run it now. */
6182 if (redisplaying_p
&& !safe
)
6185 while (delayed_size_change
)
6187 Lisp_Object tail
, frame
;
6189 delayed_size_change
= 0;
6191 FOR_EACH_FRAME (tail
, frame
)
6193 struct frame
*f
= XFRAME (frame
);
6195 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6196 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6203 /* Change the frame height and/or width. Values may be given as zero to
6204 indicate no change is to take place.
6206 If DELAY is non-zero, then assume we're being called from a signal
6207 handler, and queue the change for later - perhaps the next
6208 redisplay. Since this tries to resize windows, we can't call it
6209 from a signal handler.
6211 SAFE non-zero means this function is called from a place where it's
6212 safe to change frame sizes while a redisplay is in progress. */
6215 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6216 register struct frame
*f
;
6217 int newheight
, newwidth
, pretend
, delay
, safe
;
6219 Lisp_Object tail
, frame
;
6221 if (! FRAME_WINDOW_P (f
))
6223 /* When using termcap, or on MS-DOS, all frames use
6224 the same screen, so a change in size affects all frames. */
6225 FOR_EACH_FRAME (tail
, frame
)
6226 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6227 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6228 pretend
, delay
, safe
);
6231 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6235 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6236 register struct frame
*f
;
6237 int newheight
, newwidth
, pretend
, delay
, safe
;
6239 int new_frame_total_cols
;
6240 int count
= SPECPDL_INDEX ();
6242 /* If we can't deal with the change now, queue it for later. */
6243 if (delay
|| (redisplaying_p
&& !safe
))
6245 f
->new_text_lines
= newheight
;
6246 f
->new_text_cols
= newwidth
;
6247 delayed_size_change
= 1;
6251 /* This size-change overrides any pending one for this frame. */
6252 f
->new_text_lines
= 0;
6253 f
->new_text_cols
= 0;
6255 /* If an argument is zero, set it to the current value. */
6257 newheight
= FRAME_LINES (f
);
6259 newwidth
= FRAME_COLS (f
);
6261 /* Compute width of windows in F.
6262 This is the width of the frame without vertical scroll bars. */
6263 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6265 /* Round up to the smallest acceptable size. */
6266 check_frame_size (f
, &newheight
, &newwidth
);
6268 /* If we're not changing the frame size, quit now. */
6269 if (newheight
== FRAME_LINES (f
)
6270 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6276 /* We only can set screen dimensions to certain values supported
6277 by our video hardware. Try to find the smallest size greater
6278 or equal to the requested dimensions. */
6279 dos_set_window_size (&newheight
, &newwidth
);
6282 if (newheight
!= FRAME_LINES (f
))
6284 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6286 /* Frame has both root and mini-buffer. */
6287 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6288 FRAME_TOP_MARGIN (f
));
6289 set_window_height (FRAME_ROOT_WINDOW (f
),
6292 - FRAME_TOP_MARGIN (f
)),
6294 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6296 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6299 /* Frame has just one top-level window. */
6300 set_window_height (FRAME_ROOT_WINDOW (f
),
6301 newheight
- FRAME_TOP_MARGIN (f
), 0);
6303 if (FRAME_TERMCAP_P (f
) && !pretend
)
6304 FrameRows
= newheight
;
6307 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6309 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6310 if (FRAME_HAS_MINIBUF_P (f
))
6311 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6313 if (FRAME_TERMCAP_P (f
) && !pretend
)
6314 FrameCols
= newwidth
;
6316 if (WINDOWP (f
->tool_bar_window
))
6317 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6320 FRAME_LINES (f
) = newheight
;
6321 SET_FRAME_COLS (f
, newwidth
);
6324 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6325 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6327 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6329 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6330 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6331 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6332 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6336 calculate_costs (f
);
6337 SET_FRAME_GARBAGED (f
);
6342 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6344 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6345 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6346 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6348 unbind_to (count
, Qnil
);
6353 /***********************************************************************
6354 Terminal Related Lisp Functions
6355 ***********************************************************************/
6357 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6358 1, 1, "FOpen termscript file: ",
6359 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6360 FILE = nil means just close any termscript file currently open. */)
6364 if (termscript
!= 0) fclose (termscript
);
6369 file
= Fexpand_file_name (file
, Qnil
);
6370 termscript
= fopen (SDATA (file
), "w");
6371 if (termscript
== 0)
6372 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6378 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6379 Ssend_string_to_terminal
, 1, 1, 0,
6380 doc
: /* Send STRING to the terminal without alteration.
6381 Control characters in STRING will have terminal-dependent effects. */)
6385 /* ??? Perhaps we should do something special for multibyte strings here. */
6386 CHECK_STRING (string
);
6387 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6391 fwrite (SDATA (string
), 1, SBYTES (string
),
6393 fflush (termscript
);
6399 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6400 doc
: /* Beep, or flash the screen.
6401 Also, unless an argument is given,
6402 terminate any keyboard macro currently executing. */)
6425 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6426 error ("Keyboard macro terminated by a command ringing the bell");
6434 /***********************************************************************
6436 ***********************************************************************/
6438 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6439 doc
: /* Pause, without updating display, for SECONDS seconds.
6440 SECONDS may be a floating-point value, meaning that you can wait for a
6441 fraction of a second. Optional second arg MILLISECONDS specifies an
6442 additional wait period, in milliseconds; this may be useful if your
6443 Emacs was built without floating point support.
6444 \(Not all operating systems support waiting for a fraction of a second.) */)
6445 (seconds
, milliseconds
)
6446 Lisp_Object seconds
, milliseconds
;
6450 if (NILP (milliseconds
))
6451 XSETINT (milliseconds
, 0);
6453 CHECK_NUMBER (milliseconds
);
6454 usec
= XINT (milliseconds
) * 1000;
6457 double duration
= extract_float (seconds
);
6458 sec
= (int) duration
;
6459 usec
+= (duration
- sec
) * 1000000;
6462 #ifndef EMACS_HAS_USECS
6463 if (sec
== 0 && usec
!= 0)
6464 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6467 /* Assure that 0 <= usec < 1000000. */
6470 /* We can't rely on the rounding being correct if usec is negative. */
6471 if (-1000000 < usec
)
6472 sec
--, usec
+= 1000000;
6474 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6477 sec
+= usec
/ 1000000, usec
%= 1000000;
6479 if (sec
< 0 || (sec
== 0 && usec
== 0))
6482 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6488 /* This is just like wait_reading_process_output, except that
6491 TIMEOUT is number of seconds to wait (float or integer).
6492 READING is 1 if reading input.
6493 If DO_DISPLAY is >0 display process output while waiting.
6494 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6498 sit_for (timeout
, reading
, do_display
)
6499 Lisp_Object timeout
;
6500 int reading
, do_display
;
6504 swallow_events (do_display
);
6506 if ((detect_input_pending_run_timers (do_display
))
6507 || !NILP (Vexecuting_kbd_macro
))
6510 if (do_display
>= 2)
6511 redisplay_preserve_echo_area (2);
6513 if (INTEGERP (timeout
))
6515 sec
= XINT (timeout
);
6518 else if (FLOATP (timeout
))
6520 double seconds
= XFLOAT_DATA (timeout
);
6521 sec
= (int) seconds
;
6522 usec
= (int) ((seconds
- sec
) * 1000000);
6525 wrong_type_argument (Qnumberp
, timeout
);
6527 if (sec
== 0 && usec
== 0)
6534 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6537 return detect_input_pending () ? Qnil
: Qt
;
6541 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6542 doc
: /* Perform redisplay if no input is available.
6543 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6544 perform a full redisplay even if input is available.
6545 Return t if redisplay was performed, nil otherwise. */)
6552 if ((detect_input_pending_run_timers (1)
6553 && NILP (force
) && !redisplay_dont_pause
)
6554 || !NILP (Vexecuting_kbd_macro
))
6557 count
= SPECPDL_INDEX ();
6558 if (!NILP (force
) && !redisplay_dont_pause
)
6559 specbind (Qredisplay_dont_pause
, Qt
);
6560 redisplay_preserve_echo_area (2);
6561 unbind_to (count
, Qnil
);
6567 /***********************************************************************
6568 Other Lisp Functions
6569 ***********************************************************************/
6571 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6572 session's frames, frame names, buffers, buffer-read-only flags, and
6573 buffer-modified-flags. */
6575 static Lisp_Object frame_and_buffer_state
;
6578 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6579 Sframe_or_buffer_changed_p
, 0, 1, 0,
6580 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6581 VARIABLE is a variable name whose value is either nil or a state vector
6582 that will be updated to contain all frames and buffers,
6583 aside from buffers whose names start with space,
6584 along with the buffers' read-only and modified flags. This allows a fast
6585 check to see whether buffer menus might need to be recomputed.
6586 If this function returns non-nil, it updates the internal vector to reflect
6589 If VARIABLE is nil, an internal variable is used. Users should not
6590 pass nil for VARIABLE. */)
6592 Lisp_Object variable
;
6594 Lisp_Object state
, tail
, frame
, buf
;
6595 Lisp_Object
*vecp
, *end
;
6598 if (! NILP (variable
))
6600 CHECK_SYMBOL (variable
);
6601 state
= Fsymbol_value (variable
);
6602 if (! VECTORP (state
))
6606 state
= frame_and_buffer_state
;
6608 vecp
= XVECTOR (state
)->contents
;
6609 end
= vecp
+ XVECTOR (state
)->size
;
6611 FOR_EACH_FRAME (tail
, frame
)
6615 if (!EQ (*vecp
++, frame
))
6619 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6622 /* Check that the buffer info matches. */
6623 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6625 buf
= XCDR (XCAR (tail
));
6626 /* Ignore buffers that aren't included in buffer lists. */
6627 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6631 if (!EQ (*vecp
++, buf
))
6635 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6639 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6644 /* Detect deletion of a buffer at the end of the list. */
6645 if (EQ (*vecp
, Qlambda
))
6648 /* Come here if we decide the data has changed. */
6650 /* Count the size we will need.
6651 Start with 1 so there is room for at least one lambda at the end. */
6653 FOR_EACH_FRAME (tail
, frame
)
6655 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6657 /* Reallocate the vector if data has grown to need it,
6658 or if it has shrunk a lot. */
6659 if (! VECTORP (state
)
6660 || n
> XVECTOR (state
)->size
6661 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6662 /* Add 20 extra so we grow it less often. */
6664 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6665 if (! NILP (variable
))
6666 Fset (variable
, state
);
6668 frame_and_buffer_state
= state
;
6671 /* Record the new data in the (possibly reallocated) vector. */
6672 vecp
= XVECTOR (state
)->contents
;
6673 FOR_EACH_FRAME (tail
, frame
)
6676 *vecp
++ = XFRAME (frame
)->name
;
6678 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6680 buf
= XCDR (XCAR (tail
));
6681 /* Ignore buffers that aren't included in buffer lists. */
6682 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6685 *vecp
++ = XBUFFER (buf
)->read_only
;
6686 *vecp
++ = Fbuffer_modified_p (buf
);
6688 /* Fill up the vector with lambdas (always at least one). */
6690 while (vecp
- XVECTOR (state
)->contents
6691 < XVECTOR (state
)->size
)
6693 /* Make sure we didn't overflow the vector. */
6694 if (vecp
- XVECTOR (state
)->contents
6695 > XVECTOR (state
)->size
)
6702 /***********************************************************************
6704 ***********************************************************************/
6706 char *terminal_type
;
6708 /* Initialization done when Emacs fork is started, before doing stty.
6709 Determine terminal type and set terminal_driver. Then invoke its
6710 decoding routine to set up variables in the terminal package. */
6715 #ifdef HAVE_X_WINDOWS
6716 extern int display_arg
;
6719 /* Construct the space glyph. */
6720 space_glyph
.type
= CHAR_GLYPH
;
6721 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6722 space_glyph
.charpos
= -1;
6726 cursor_in_echo_area
= 0;
6727 terminal_type
= (char *) 0;
6729 /* Now is the time to initialize this; it's used by init_sys_modes
6731 Vwindow_system
= Qnil
;
6733 /* If the user wants to use a window system, we shouldn't bother
6734 initializing the terminal. This is especially important when the
6735 terminal is so dumb that emacs gives up before and doesn't bother
6736 using the window system.
6738 If the DISPLAY environment variable is set and nonempty,
6739 try to use X, and die with an error message if that doesn't work. */
6741 #ifdef HAVE_X_WINDOWS
6742 if (! inhibit_window_system
&& ! display_arg
)
6746 display
= getenv ("DECW$DISPLAY");
6748 display
= getenv ("DISPLAY");
6751 display_arg
= (display
!= 0 && *display
!= 0);
6753 if (display_arg
&& !x_display_ok (display
))
6755 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6757 inhibit_window_system
= 1;
6761 if (!inhibit_window_system
&& display_arg
6767 Vwindow_system
= intern ("x");
6769 Vwindow_system_version
= make_number (11);
6771 Vwindow_system_version
= make_number (10);
6773 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6774 /* In some versions of ncurses,
6775 tputs crashes if we have not called tgetent.
6777 { char b
[2044]; tgetent (b
, "xterm");}
6779 adjust_frame_glyphs_initially ();
6782 #endif /* HAVE_X_WINDOWS */
6785 if (!inhibit_window_system
)
6787 Vwindow_system
= intern ("w32");
6788 Vwindow_system_version
= make_number (1);
6789 adjust_frame_glyphs_initially ();
6792 #endif /* HAVE_NTGUI */
6795 if (!inhibit_window_system
)
6797 Vwindow_system
= intern ("mac");
6798 Vwindow_system_version
= make_number (1);
6799 adjust_frame_glyphs_initially ();
6804 /* If no window system has been specified, try to use the terminal. */
6807 fatal ("standard input is not a tty");
6811 /* Look at the TERM variable. */
6812 terminal_type
= (char *) getenv ("TERM");
6816 fprintf (stderr
, "Please specify your terminal type.\n\
6817 For types defined in VMS, use set term /device=TYPE.\n\
6818 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6819 \(The quotation marks are necessary since terminal types are lower case.)\n");
6822 #ifdef HAVE_WINDOW_SYSTEM
6823 if (! inhibit_window_system
)
6824 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6826 #endif /* HAVE_WINDOW_SYSTEM */
6827 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6828 #endif /* not VMS */
6833 /* VMS DCL tends to up-case things, so down-case term type.
6834 Hardly any uppercase letters in terminal types; should be none. */
6836 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6839 strcpy (new, terminal_type
);
6841 for (p
= new; *p
; p
++)
6845 terminal_type
= new;
6849 term_init (terminal_type
);
6852 struct frame
*sf
= SELECTED_FRAME ();
6853 int width
= FRAME_TOTAL_COLS (sf
);
6854 int height
= FRAME_LINES (sf
);
6856 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6858 /* If these sizes are so big they cause overflow, just ignore the
6859 change. It's not clear what better we could do. */
6860 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6861 fatal ("screen size %dx%d too big", width
, height
);
6864 adjust_frame_glyphs_initially ();
6865 calculate_costs (XFRAME (selected_frame
));
6870 #endif /* CANNOT_DUMP */
6871 signal (SIGWINCH
, window_change_signal
);
6872 #endif /* SIGWINCH */
6874 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6878 /* The MSDOS terminal turns on its ``window system'' relatively
6879 late into the startup, so we cannot do the frame faces'
6880 initialization just yet. It will be done later by pc-win.el
6881 and internal_terminal_init. */
6882 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6884 && NILP (Vwindow_system
))
6886 /* For the initial frame, we don't have any way of knowing what
6887 are the foreground and background colors of the terminal. */
6888 struct frame
*sf
= SELECTED_FRAME();
6890 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6891 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6892 call0 (intern ("tty-set-up-initial-frame-faces"));
6898 /***********************************************************************
6900 ***********************************************************************/
6902 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6903 Sinternal_show_cursor
, 2, 2, 0,
6904 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6905 WINDOW nil means use the selected window. SHOW non-nil means
6906 show a cursor in WINDOW in the next redisplay. SHOW nil means
6907 don't show a cursor. */)
6909 Lisp_Object window
, show
;
6911 /* Don't change cursor state while redisplaying. This could confuse
6913 if (!redisplaying_p
)
6916 window
= selected_window
;
6918 CHECK_WINDOW (window
);
6920 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6927 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6928 Sinternal_show_cursor_p
, 0, 1, 0,
6929 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6930 WINDOW nil or omitted means report on the selected window. */)
6937 window
= selected_window
;
6939 CHECK_WINDOW (window
);
6941 w
= XWINDOW (window
);
6942 return w
->cursor_off_p
? Qnil
: Qt
;
6946 /***********************************************************************
6948 ***********************************************************************/
6953 defsubr (&Sredraw_frame
);
6954 defsubr (&Sredraw_display
);
6955 defsubr (&Sframe_or_buffer_changed_p
);
6956 defsubr (&Sopen_termscript
);
6958 defsubr (&Sredisplay
);
6959 defsubr (&Ssleep_for
);
6960 defsubr (&Ssend_string_to_terminal
);
6961 defsubr (&Sinternal_show_cursor
);
6962 defsubr (&Sinternal_show_cursor_p
);
6965 defsubr (&Sdump_redisplay_history
);
6968 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6969 staticpro (&frame_and_buffer_state
);
6971 Qdisplay_table
= intern ("display-table");
6972 staticpro (&Qdisplay_table
);
6973 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6974 staticpro (&Qredisplay_dont_pause
);
6976 DEFVAR_INT ("baud-rate", &baud_rate
,
6977 doc
: /* *The output baud rate of the terminal.
6978 On most systems, changing this value will affect the amount of padding
6979 and the other strategic decisions made during redisplay. */);
6981 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6982 doc
: /* *Non-nil means invert the entire frame display.
6983 This means everything is in inverse video which otherwise would not be. */);
6985 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6986 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6988 See also `ring-bell-function'. */);
6990 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6991 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6992 A non-nil value is useful if the terminal can automatically preserve
6993 Emacs's frame display when you reenter Emacs.
6994 It is up to you to set this variable if your terminal can do that. */);
6996 DEFVAR_LISP ("window-system", &Vwindow_system
,
6997 doc
: /* Name of window system that Emacs is displaying through.
6998 The value is a symbol--for instance, `x' for X windows.
6999 The value is nil if Emacs is using a text-only terminal. */);
7001 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7002 doc
: /* The version number of the window system in use.
7003 For X windows, this is 10 or 11. */);
7005 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7006 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7008 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7009 doc
: /* Table defining how to output a glyph code to the frame.
7010 If not nil, this is a vector indexed by glyph code to define the glyph.
7011 Each element can be:
7012 integer: a glyph code which this glyph is an alias for.
7013 string: output this glyph using that string (not impl. in X windows).
7014 nil: this glyph mod 524288 is the code of a character to output,
7015 and this glyph / 524288 is the face number (see `face-id') to use
7016 while outputting it. */);
7017 Vglyph_table
= Qnil
;
7019 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7020 doc
: /* Display table to use for buffers that specify none.
7021 See `buffer-display-table' for more information. */);
7022 Vstandard_display_table
= Qnil
;
7024 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7025 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7026 redisplay_dont_pause
= 0;
7028 #if PERIODIC_PREEMPTION_CHECKING
7029 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7030 doc
: /* *The period in seconds between checking for input during redisplay.
7031 If input is detected, redisplay is pre-empted, and the input is processed.
7032 If nil, never pre-empt redisplay. */);
7033 Vredisplay_preemption_period
= make_float (0.10);
7040 Vwindow_system
= Qnil
;
7041 Vwindow_system_version
= Qnil
;
7045 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7046 (do not change this comment) */