1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
196 are supported, so we can check for input during redisplay at
197 regular intervals. */
198 #ifdef EMACS_HAS_USECS
199 #define PERIODIC_PREEMPTION_CHECKING 1
201 #define PERIODIC_PREEMPTION_CHECKING 0
204 #if PERIODIC_PREEMPTION_CHECKING
206 /* If a number (float), check for user input every N seconds. */
208 Lisp_Object Vredisplay_preemption_period
;
210 /* Redisplay preemption timers. */
212 static EMACS_TIME preemption_period
;
213 static EMACS_TIME preemption_next_check
;
217 /* Nonzero upon entry to redisplay means do not assume anything about
218 current contents of actual terminal frame; clear and redraw it. */
222 /* Nonzero means last display completed. Zero means it was preempted. */
224 int display_completed
;
226 /* Lisp variable visible-bell; enables use of screen-flash instead of
231 /* Invert the color of the whole frame, at a low level. */
235 /* Line speed of the terminal. */
239 /* Either nil or a symbol naming the window system under which Emacs
242 Lisp_Object Vwindow_system
;
244 /* Version number of X windows: 10, 11 or nil. */
246 Lisp_Object Vwindow_system_version
;
248 /* Vector of glyph definitions. Indexed by glyph number, the contents
249 are a string which is how to output the glyph.
251 If Vglyph_table is nil, a glyph is output by using its low 8 bits
254 This is an obsolete feature that is no longer used. The variable
255 is retained for compatibility. */
257 Lisp_Object Vglyph_table
;
259 /* Display table to use for vectors that don't specify their own. */
261 Lisp_Object Vstandard_display_table
;
263 /* Nonzero means reading single-character input with prompt so put
264 cursor on mini-buffer after the prompt. Positive means at end of
265 text in echo area; negative means at beginning of line. */
267 int cursor_in_echo_area
;
269 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
272 /* The currently selected frame. In a single-frame version, this
273 variable always equals the_only_frame. */
275 Lisp_Object selected_frame
;
277 /* A frame which is not just a mini-buffer, or 0 if there are no such
278 frames. This is usually the most recent such frame that was
279 selected. In a single-frame version, this variable always holds
280 the address of the_only_frame. */
282 struct frame
*last_nonminibuf_frame
;
284 /* Stdio stream being used for copy of all output. */
288 /* Structure for info on cursor positioning. */
292 /* 1 means SIGWINCH happened when not safe. */
294 int delayed_size_change
;
296 /* 1 means glyph initialization has been completed at startup. */
298 static int glyphs_initialized_initially_p
;
300 /* Updated window if != 0. Set by update_window. */
302 struct window
*updated_window
;
304 /* Glyph row updated in update_window_line, and area that is updated. */
306 struct glyph_row
*updated_row
;
309 /* A glyph for a space. */
311 struct glyph space_glyph
;
313 /* Non-zero means update has been performed directly, so that there's
314 no need for redisplay_internal to do much work. Set by
315 direct_output_for_insert. */
317 int redisplay_performed_directly_p
;
319 /* Counts of allocated structures. These counts serve to diagnose
320 memory leaks and double frees. */
322 int glyph_matrix_count
;
323 int glyph_pool_count
;
325 /* If non-null, the frame whose frame matrices are manipulated. If
326 null, window matrices are worked on. */
328 static struct frame
*frame_matrix_frame
;
330 /* Current interface for window-based redisplay. Set from init_xterm.
331 A null value means we are not using window-based redisplay. */
333 struct redisplay_interface
*rif
;
335 /* Non-zero means that fonts have been loaded since the last glyph
336 matrix adjustments. Redisplay must stop, and glyph matrices must
337 be adjusted when this flag becomes non-zero during display. The
338 reason fonts can be loaded so late is that fonts of fontsets are
343 /* Convert vpos and hpos from frame to window and vice versa.
344 This may only be used for terminal frames. */
348 static int window_to_frame_vpos
P_ ((struct window
*, int));
349 static int window_to_frame_hpos
P_ ((struct window
*, int));
350 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
351 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
353 /* One element of the ring buffer containing redisplay history
356 struct redisplay_history
358 char trace
[512 + 100];
361 /* The size of the history buffer. */
363 #define REDISPLAY_HISTORY_SIZE 30
365 /* The redisplay history buffer. */
367 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
369 /* Next free entry in redisplay_history. */
371 static int history_idx
;
373 /* A tick that's incremented each time something is added to the
376 static unsigned history_tick
;
378 static void add_frame_display_history
P_ ((struct frame
*, int));
379 static void add_window_display_history
P_ ((struct window
*, char *, int));
381 /* Add to the redisplay history how window W has been displayed.
382 MSG is a trace containing the information how W's glyph matrix
383 has been constructed. PAUSED_P non-zero means that the update
384 has been interrupted for pending input. */
387 add_window_display_history (w
, msg
, paused_p
)
394 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
396 buf
= redisplay_history
[history_idx
].trace
;
399 sprintf (buf
, "%d: window %p (`%s')%s\n",
402 ((BUFFERP (w
->buffer
)
403 && STRINGP (XBUFFER (w
->buffer
)->name
))
404 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
406 paused_p
? " ***paused***" : "");
411 /* Add to the redisplay history that frame F has been displayed.
412 PAUSED_P non-zero means that the update has been interrupted for
416 add_frame_display_history (f
, paused_p
)
422 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
424 buf
= redisplay_history
[history_idx
].trace
;
427 sprintf (buf
, "%d: update frame %p%s",
429 f
, paused_p
? " ***paused***" : "");
433 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
434 Sdump_redisplay_history
, 0, 0, "",
435 doc
: /* Dump redisplay history to stderr. */)
440 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
443 i
= REDISPLAY_HISTORY_SIZE
- 1;
444 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
451 #else /* GLYPH_DEBUG == 0 */
453 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
454 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
456 #endif /* GLYPH_DEBUG == 0 */
459 /* Like bcopy except never gets confused by overlap. Let this be the
460 first function defined in this file, or change emacs.c where the
461 address of this function is used. */
464 safe_bcopy (from
, to
, size
)
469 if (size
<= 0 || from
== to
)
472 /* If the source and destination don't overlap, then bcopy can
473 handle it. If they do overlap, but the destination is lower in
474 memory than the source, we'll assume bcopy can handle that. */
475 if (to
< from
|| from
+ size
<= to
)
476 bcopy (from
, to
, size
);
478 /* Otherwise, we'll copy from the end. */
481 register const char *endf
= from
+ size
;
482 register char *endt
= to
+ size
;
484 /* If TO - FROM is large, then we should break the copy into
485 nonoverlapping chunks of TO - FROM bytes each. However, if
486 TO - FROM is small, then the bcopy function call overhead
487 makes this not worth it. The crossover point could be about
488 anywhere. Since I don't think the obvious copy loop is too
489 bad, I'm trying to err in its favor. */
494 while (endf
!= from
);
506 bcopy (endf
, endt
, to
- from
);
509 /* If SIZE wasn't a multiple of TO - FROM, there will be a
510 little left over. The amount left over is (endt + (to -
511 from)) - to, which is endt - from. */
512 bcopy (from
, to
, endt
- from
);
519 /***********************************************************************
521 ***********************************************************************/
523 /* Allocate and return a glyph_matrix structure. POOL is the glyph
524 pool from which memory for the matrix should be allocated, or null
525 for window-based redisplay where no glyph pools are used. The
526 member `pool' of the glyph matrix structure returned is set to
527 POOL, the structure is otherwise zeroed. */
529 struct glyph_matrix
*
530 new_glyph_matrix (pool
)
531 struct glyph_pool
*pool
;
533 struct glyph_matrix
*result
;
535 /* Allocate and clear. */
536 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
537 bzero (result
, sizeof *result
);
539 /* Increment number of allocated matrices. This count is used
540 to detect memory leaks. */
541 ++glyph_matrix_count
;
543 /* Set pool and return. */
549 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
551 The global counter glyph_matrix_count is decremented when a matrix
552 is freed. If the count gets negative, more structures were freed
553 than allocated, i.e. one matrix was freed more than once or a bogus
554 pointer was passed to this function.
556 If MATRIX->pool is null, this means that the matrix manages its own
557 glyph memory---this is done for matrices on X frames. Freeing the
558 matrix also frees the glyph memory in this case. */
561 free_glyph_matrix (matrix
)
562 struct glyph_matrix
*matrix
;
568 /* Detect the case that more matrices are freed than were
570 if (--glyph_matrix_count
< 0)
573 /* Free glyph memory if MATRIX owns it. */
574 if (matrix
->pool
== NULL
)
575 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
576 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
578 /* Free row structures and the matrix itself. */
579 xfree (matrix
->rows
);
585 /* Return the number of glyphs to reserve for a marginal area of
586 window W. TOTAL_GLYPHS is the number of glyphs in a complete
587 display line of window W. MARGIN gives the width of the marginal
588 area in canonical character units. MARGIN should be an integer
592 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
599 if (NUMBERP (margin
))
601 int width
= XFASTINT (w
->total_cols
);
602 double d
= max (0, XFLOATINT (margin
));
603 d
= min (width
/ 2 - 1, d
);
604 n
= (int) ((double) total_glyphs
/ width
* d
);
613 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
616 W is null if the function is called for a frame glyph matrix.
617 Otherwise it is the window MATRIX is a member of. X and Y are the
618 indices of the first column and row of MATRIX within the frame
619 matrix, if such a matrix exists. They are zero for purely
620 window-based redisplay. DIM is the needed size of the matrix.
622 In window-based redisplay, where no frame matrices exist, glyph
623 matrices manage their own glyph storage. Otherwise, they allocate
624 storage from a common frame glyph pool which can be found in
627 The reason for this memory management strategy is to avoid complete
628 frame redraws if possible. When we allocate from a common pool, a
629 change of the location or size of a sub-matrix within the pool
630 requires a complete redisplay of the frame because we cannot easily
631 make sure that the current matrices of all windows still agree with
632 what is displayed on the screen. While this is usually fast, it
633 leads to screen flickering. */
636 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
638 struct glyph_matrix
*matrix
;
644 int marginal_areas_changed_p
= 0;
645 int header_line_changed_p
= 0;
646 int header_line_p
= 0;
647 int left
= -1, right
= -1;
648 int window_width
= -1, window_height
;
650 /* See if W had a header line that has disappeared now, or vice versa.
654 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
656 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
657 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
659 matrix
->header_line_p
= header_line_p
;
661 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
662 Do nothing if MATRIX' size, position, vscroll, and marginal areas
663 haven't changed. This optimization is important because preserving
664 the matrix means preventing redisplay. */
665 if (matrix
->pool
== NULL
)
667 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
668 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
669 xassert (left
>= 0 && right
>= 0);
670 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
671 || right
!= matrix
->right_margin_glyphs
);
673 if (!marginal_areas_changed_p
675 && !header_line_changed_p
676 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
677 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
678 && matrix
->window_height
== window_height
679 && matrix
->window_vscroll
== w
->vscroll
680 && matrix
->window_width
== window_width
)
684 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
685 if (matrix
->rows_allocated
< dim
.height
)
687 int size
= dim
.height
* sizeof (struct glyph_row
);
688 new_rows
= dim
.height
- matrix
->rows_allocated
;
689 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
690 bzero (matrix
->rows
+ matrix
->rows_allocated
,
691 new_rows
* sizeof *matrix
->rows
);
692 matrix
->rows_allocated
= dim
.height
;
697 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
698 on a frame not using window-based redisplay. Set up pointers for
699 each row into the glyph pool. */
702 xassert (matrix
->pool
->glyphs
);
706 left
= margin_glyphs_to_reserve (w
, dim
.width
,
707 w
->left_margin_cols
);
708 right
= margin_glyphs_to_reserve (w
, dim
.width
,
709 w
->right_margin_cols
);
714 for (i
= 0; i
< dim
.height
; ++i
)
716 struct glyph_row
*row
= &matrix
->rows
[i
];
718 row
->glyphs
[LEFT_MARGIN_AREA
]
719 = (matrix
->pool
->glyphs
720 + (y
+ i
) * matrix
->pool
->ncolumns
724 || row
== matrix
->rows
+ dim
.height
- 1
725 || (row
== matrix
->rows
&& matrix
->header_line_p
))
727 row
->glyphs
[TEXT_AREA
]
728 = row
->glyphs
[LEFT_MARGIN_AREA
];
729 row
->glyphs
[RIGHT_MARGIN_AREA
]
730 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
731 row
->glyphs
[LAST_AREA
]
732 = row
->glyphs
[RIGHT_MARGIN_AREA
];
736 row
->glyphs
[TEXT_AREA
]
737 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
738 row
->glyphs
[RIGHT_MARGIN_AREA
]
739 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
740 row
->glyphs
[LAST_AREA
]
741 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
745 matrix
->left_margin_glyphs
= left
;
746 matrix
->right_margin_glyphs
= right
;
750 /* If MATRIX->pool is null, MATRIX is responsible for managing
751 its own memory. It is a window matrix for window-based redisplay.
752 Allocate glyph memory from the heap. */
753 if (dim
.width
> matrix
->matrix_w
755 || header_line_changed_p
756 || marginal_areas_changed_p
)
758 struct glyph_row
*row
= matrix
->rows
;
759 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
763 row
->glyphs
[LEFT_MARGIN_AREA
]
764 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
766 * sizeof (struct glyph
)));
768 /* The mode line never has marginal areas. */
769 if (row
== matrix
->rows
+ dim
.height
- 1
770 || (row
== matrix
->rows
&& matrix
->header_line_p
))
772 row
->glyphs
[TEXT_AREA
]
773 = row
->glyphs
[LEFT_MARGIN_AREA
];
774 row
->glyphs
[RIGHT_MARGIN_AREA
]
775 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
776 row
->glyphs
[LAST_AREA
]
777 = row
->glyphs
[RIGHT_MARGIN_AREA
];
781 row
->glyphs
[TEXT_AREA
]
782 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
783 row
->glyphs
[RIGHT_MARGIN_AREA
]
784 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
785 row
->glyphs
[LAST_AREA
]
786 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
792 xassert (left
>= 0 && right
>= 0);
793 matrix
->left_margin_glyphs
= left
;
794 matrix
->right_margin_glyphs
= right
;
797 /* Number of rows to be used by MATRIX. */
798 matrix
->nrows
= dim
.height
;
799 xassert (matrix
->nrows
>= 0);
803 if (matrix
== w
->current_matrix
)
805 /* Mark rows in a current matrix of a window as not having
806 valid contents. It's important to not do this for
807 desired matrices. When Emacs starts, it may already be
808 building desired matrices when this function runs. */
809 if (window_width
< 0)
810 window_width
= window_box_width (w
, -1);
812 /* Optimize the case that only the height has changed (C-x 2,
813 upper window). Invalidate all rows that are no longer part
815 if (!marginal_areas_changed_p
816 && !header_line_changed_p
818 && dim
.width
== matrix
->matrix_w
819 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
820 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
821 && matrix
->window_width
== window_width
)
823 /* Find the last row in the window. */
824 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
825 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
831 /* Window end is invalid, if inside of the rows that
832 are invalidated below. */
833 if (INTEGERP (w
->window_end_vpos
)
834 && XFASTINT (w
->window_end_vpos
) >= i
)
835 w
->window_end_valid
= Qnil
;
837 while (i
< matrix
->nrows
)
838 matrix
->rows
[i
++].enabled_p
= 0;
842 for (i
= 0; i
< matrix
->nrows
; ++i
)
843 matrix
->rows
[i
].enabled_p
= 0;
846 else if (matrix
== w
->desired_matrix
)
848 /* Rows in desired matrices always have to be cleared;
849 redisplay expects this is the case when it runs, so it
850 had better be the case when we adjust matrices between
852 for (i
= 0; i
< matrix
->nrows
; ++i
)
853 matrix
->rows
[i
].enabled_p
= 0;
858 /* Remember last values to be able to optimize frame redraws. */
859 matrix
->matrix_x
= x
;
860 matrix
->matrix_y
= y
;
861 matrix
->matrix_w
= dim
.width
;
862 matrix
->matrix_h
= dim
.height
;
864 /* Record the top y location and height of W at the time the matrix
865 was last adjusted. This is used to optimize redisplay above. */
868 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
869 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
870 matrix
->window_height
= window_height
;
871 matrix
->window_width
= window_width
;
872 matrix
->window_vscroll
= w
->vscroll
;
877 /* Reverse the contents of rows in MATRIX between START and END. The
878 contents of the row at END - 1 end up at START, END - 2 at START +
879 1 etc. This is part of the implementation of rotate_matrix (see
883 reverse_rows (matrix
, start
, end
)
884 struct glyph_matrix
*matrix
;
889 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
891 /* Non-ISO HP/UX compiler doesn't like auto struct
893 struct glyph_row temp
;
894 temp
= matrix
->rows
[i
];
895 matrix
->rows
[i
] = matrix
->rows
[j
];
896 matrix
->rows
[j
] = temp
;
901 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
902 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
903 indices. (Note: this does not copy glyphs, only glyph pointers in
904 row structures are moved around).
906 The algorithm used for rotating the vector was, I believe, first
907 described by Kernighan. See the vector R as consisting of two
908 sub-vectors AB, where A has length BY for BY >= 0. The result
909 after rotating is then BA. Reverse both sub-vectors to get ArBr
910 and reverse the result to get (ArBr)r which is BA. Similar for
914 rotate_matrix (matrix
, first
, last
, by
)
915 struct glyph_matrix
*matrix
;
920 /* Up (rotate left, i.e. towards lower indices). */
922 reverse_rows (matrix
, first
, first
+ by
);
923 reverse_rows (matrix
, first
+ by
, last
);
924 reverse_rows (matrix
, first
, last
);
928 /* Down (rotate right, i.e. towards higher indices). */
929 reverse_rows (matrix
, last
- by
, last
);
930 reverse_rows (matrix
, first
, last
- by
);
931 reverse_rows (matrix
, first
, last
);
936 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
937 with indices START <= index < END. Increment positions by DELTA/
941 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
942 struct glyph_matrix
*matrix
;
943 int start
, end
, delta
, delta_bytes
;
945 /* Check that START and END are reasonable values. */
946 xassert (start
>= 0 && start
<= matrix
->nrows
);
947 xassert (end
>= 0 && end
<= matrix
->nrows
);
948 xassert (start
<= end
);
950 for (; start
< end
; ++start
)
951 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
955 /* Enable a range of rows in glyph matrix MATRIX. START and END are
956 the row indices of the first and last + 1 row to enable. If
957 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
960 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
961 struct glyph_matrix
*matrix
;
965 xassert (start
<= end
);
966 xassert (start
>= 0 && start
< matrix
->nrows
);
967 xassert (end
>= 0 && end
<= matrix
->nrows
);
969 for (; start
< end
; ++start
)
970 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
976 This empties all rows in MATRIX by setting the enabled_p flag for
977 all rows of the matrix to zero. The function prepare_desired_row
978 will eventually really clear a row when it sees one with a zero
981 Resets update hints to defaults value. The only update hint
982 currently present is the flag MATRIX->no_scrolling_p. */
985 clear_glyph_matrix (matrix
)
986 struct glyph_matrix
*matrix
;
990 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
991 matrix
->no_scrolling_p
= 0;
996 /* Shift part of the glyph matrix MATRIX of window W up or down.
997 Increment y-positions in glyph rows between START and END by DY,
998 and recompute their visible height. */
1001 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
1003 struct glyph_matrix
*matrix
;
1008 xassert (start
<= end
);
1009 xassert (start
>= 0 && start
< matrix
->nrows
);
1010 xassert (end
>= 0 && end
<= matrix
->nrows
);
1012 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1013 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1015 for (; start
< end
; ++start
)
1017 struct glyph_row
*row
= &matrix
->rows
[start
];
1020 row
->visible_height
= row
->height
;
1023 row
->visible_height
-= min_y
- row
->y
;
1024 if (row
->y
+ row
->height
> max_y
)
1025 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1030 /* Mark all rows in current matrices of frame F as invalid. Marking
1031 invalid is done by setting enabled_p to zero for all rows in a
1035 clear_current_matrices (f
)
1036 register struct frame
*f
;
1038 /* Clear frame current matrix, if we have one. */
1039 if (f
->current_matrix
)
1040 clear_glyph_matrix (f
->current_matrix
);
1042 /* Clear the matrix of the menu bar window, if such a window exists.
1043 The menu bar window is currently used to display menus on X when
1044 no toolkit support is compiled in. */
1045 if (WINDOWP (f
->menu_bar_window
))
1046 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1048 /* Clear the matrix of the tool-bar window, if any. */
1049 if (WINDOWP (f
->tool_bar_window
))
1050 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1052 /* Clear current window matrices. */
1053 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1054 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1058 /* Clear out all display lines of F for a coming redisplay. */
1061 clear_desired_matrices (f
)
1062 register struct frame
*f
;
1064 if (f
->desired_matrix
)
1065 clear_glyph_matrix (f
->desired_matrix
);
1067 if (WINDOWP (f
->menu_bar_window
))
1068 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1070 if (WINDOWP (f
->tool_bar_window
))
1071 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1073 /* Do it for window matrices. */
1074 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1075 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1079 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1080 non-zero clear desired matrices, otherwise clear current matrices. */
1083 clear_window_matrices (w
, desired_p
)
1089 if (!NILP (w
->hchild
))
1091 xassert (WINDOWP (w
->hchild
));
1092 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1094 else if (!NILP (w
->vchild
))
1096 xassert (WINDOWP (w
->vchild
));
1097 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1102 clear_glyph_matrix (w
->desired_matrix
);
1105 clear_glyph_matrix (w
->current_matrix
);
1106 w
->window_end_valid
= Qnil
;
1110 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1116 /***********************************************************************
1119 See dispextern.h for an overall explanation of glyph rows.
1120 ***********************************************************************/
1122 /* Clear glyph row ROW. Do it in a way that makes it robust against
1123 changes in the glyph_row structure, i.e. addition or removal of
1124 structure members. */
1126 static struct glyph_row null_row
;
1129 clear_glyph_row (row
)
1130 struct glyph_row
*row
;
1132 struct glyph
*p
[1 + LAST_AREA
];
1134 /* Save pointers. */
1135 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1136 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1137 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1138 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1143 /* Restore pointers. */
1144 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1145 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1146 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1147 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1149 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1150 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1151 Redisplay outputs such glyphs, and flickering effects were
1152 the result. This also depended on the contents of memory
1153 returned by xmalloc. If flickering happens again, activate
1154 the code below. If the flickering is gone with that, chances
1155 are that the flickering has the same reason as here. */
1156 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1161 /* Make ROW an empty, enabled row of canonical character height,
1162 in window W starting at y-position Y. */
1165 blank_row (w
, row
, y
)
1167 struct glyph_row
*row
;
1172 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1173 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1175 clear_glyph_row (row
);
1177 row
->ascent
= row
->phys_ascent
= 0;
1178 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1179 row
->visible_height
= row
->height
;
1182 row
->visible_height
-= min_y
- row
->y
;
1183 if (row
->y
+ row
->height
> max_y
)
1184 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1190 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1191 are the amounts by which to change positions. Note that the first
1192 glyph of the text area of a row can have a buffer position even if
1193 the used count of the text area is zero. Such rows display line
1197 increment_row_positions (row
, delta
, delta_bytes
)
1198 struct glyph_row
*row
;
1199 int delta
, delta_bytes
;
1203 /* Increment start and end positions. */
1204 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1205 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1206 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1207 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1209 if (!row
->enabled_p
)
1212 /* Increment positions in glyphs. */
1213 for (area
= 0; area
< LAST_AREA
; ++area
)
1214 for (i
= 0; i
< row
->used
[area
]; ++i
)
1215 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1216 && row
->glyphs
[area
][i
].charpos
> 0)
1217 row
->glyphs
[area
][i
].charpos
+= delta
;
1219 /* Capture the case of rows displaying a line end. */
1220 if (row
->used
[TEXT_AREA
] == 0
1221 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1222 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1227 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1228 contents, i.e. glyph structure contents are exchanged between A and
1229 B without changing glyph pointers in A and B. */
1232 swap_glyphs_in_rows (a
, b
)
1233 struct glyph_row
*a
, *b
;
1237 for (area
= 0; area
< LAST_AREA
; ++area
)
1239 /* Number of glyphs to swap. */
1240 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1242 /* Start of glyphs in area of row A. */
1243 struct glyph
*glyph_a
= a
->glyphs
[area
];
1245 /* End + 1 of glyphs in area of row A. */
1246 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1248 /* Start of glyphs in area of row B. */
1249 struct glyph
*glyph_b
= b
->glyphs
[area
];
1251 while (glyph_a
< glyph_a_end
)
1253 /* Non-ISO HP/UX compiler doesn't like auto struct
1257 *glyph_a
= *glyph_b
;
1267 /* Exchange pointers to glyph memory between glyph rows A and B. */
1270 swap_glyph_pointers (a
, b
)
1271 struct glyph_row
*a
, *b
;
1274 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1276 struct glyph
*temp
= a
->glyphs
[i
];
1277 a
->glyphs
[i
] = b
->glyphs
[i
];
1278 b
->glyphs
[i
] = temp
;
1283 /* Copy glyph row structure FROM to glyph row structure TO, except
1284 that glyph pointers in the structures are left unchanged. */
1287 copy_row_except_pointers (to
, from
)
1288 struct glyph_row
*to
, *from
;
1290 struct glyph
*pointers
[1 + LAST_AREA
];
1292 /* Save glyph pointers of TO. */
1293 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1295 /* Do a structure assignment. */
1298 /* Restore original pointers of TO. */
1299 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1303 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1304 TO and FROM are left unchanged. Glyph contents are copied from the
1305 glyph memory of FROM to the glyph memory of TO. Increment buffer
1306 positions in row TO by DELTA/ DELTA_BYTES. */
1309 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1310 struct glyph_row
*to
, *from
;
1311 int delta
, delta_bytes
;
1315 /* This is like a structure assignment TO = FROM, except that
1316 glyph pointers in the rows are left unchanged. */
1317 copy_row_except_pointers (to
, from
);
1319 /* Copy glyphs from FROM to TO. */
1320 for (area
= 0; area
< LAST_AREA
; ++area
)
1321 if (from
->used
[area
])
1322 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1323 from
->used
[area
] * sizeof (struct glyph
));
1325 /* Increment buffer positions in TO by DELTA. */
1326 increment_row_positions (to
, delta
, delta_bytes
);
1330 /* Assign glyph row FROM to glyph row TO. This works like a structure
1331 assignment TO = FROM, except that glyph pointers are not copied but
1332 exchanged between TO and FROM. Pointers must be exchanged to avoid
1336 assign_row (to
, from
)
1337 struct glyph_row
*to
, *from
;
1339 swap_glyph_pointers (to
, from
);
1340 copy_row_except_pointers (to
, from
);
1344 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1345 a row in a window matrix, is a slice of the glyph memory of the
1346 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1347 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1348 memory of FRAME_ROW. */
1353 glyph_row_slice_p (window_row
, frame_row
)
1354 struct glyph_row
*window_row
, *frame_row
;
1356 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1357 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1358 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1360 return (frame_glyph_start
<= window_glyph_start
1361 && window_glyph_start
< frame_glyph_end
);
1364 #endif /* GLYPH_DEBUG */
1368 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1369 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1370 in WINDOW_MATRIX is found satisfying the condition. */
1372 static struct glyph_row
*
1373 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1374 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1379 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1381 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1382 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1383 frame_matrix
->rows
+ row
))
1386 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1391 /* Prepare ROW for display. Desired rows are cleared lazily,
1392 i.e. they are only marked as to be cleared by setting their
1393 enabled_p flag to zero. When a row is to be displayed, a prior
1394 call to this function really clears it. */
1397 prepare_desired_row (row
)
1398 struct glyph_row
*row
;
1400 if (!row
->enabled_p
)
1402 clear_glyph_row (row
);
1408 /* Return a hash code for glyph row ROW. */
1411 line_hash_code (row
)
1412 struct glyph_row
*row
;
1418 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1419 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1423 int c
= glyph
->u
.ch
;
1424 int face_id
= glyph
->face_id
;
1425 if (must_write_spaces
)
1427 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1428 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1440 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1441 the number of characters in the line. If must_write_spaces is
1442 zero, leading and trailing spaces are ignored. */
1445 line_draw_cost (matrix
, vpos
)
1446 struct glyph_matrix
*matrix
;
1449 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1450 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1451 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1453 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1454 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1456 /* Ignore trailing and leading spaces if we can. */
1457 if (!must_write_spaces
)
1459 /* Skip from the end over trailing spaces. */
1460 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1463 /* All blank line. */
1467 /* Skip over leading spaces. */
1468 while (CHAR_GLYPH_SPACE_P (*beg
))
1472 /* If we don't have a glyph-table, each glyph is one character,
1473 so return the number of glyphs. */
1474 if (glyph_table_base
== 0)
1478 /* Otherwise, scan the glyphs and accumulate their total length
1483 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1486 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1489 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1499 /* Test two glyph rows A and B for equality. Value is non-zero if A
1500 and B have equal contents. W is the window to which the glyphs
1501 rows A and B belong. It is needed here to test for partial row
1502 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1503 flags of A and B, too. */
1506 row_equal_p (w
, a
, b
, mouse_face_p
)
1508 struct glyph_row
*a
, *b
;
1513 else if (a
->hash
!= b
->hash
)
1517 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1520 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1523 /* Compare glyphs. */
1524 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1526 if (a
->used
[area
] != b
->used
[area
])
1529 a_glyph
= a
->glyphs
[area
];
1530 a_end
= a_glyph
+ a
->used
[area
];
1531 b_glyph
= b
->glyphs
[area
];
1533 while (a_glyph
< a_end
1534 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1535 ++a_glyph
, ++b_glyph
;
1537 if (a_glyph
!= a_end
)
1541 if (a
->fill_line_p
!= b
->fill_line_p
1542 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1543 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1544 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1545 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1546 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1547 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1548 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1549 || a
->overlapped_p
!= b
->overlapped_p
1550 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1551 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1552 /* Different partially visible characters on left margin. */
1554 /* Different height. */
1555 || a
->ascent
!= b
->ascent
1556 || a
->phys_ascent
!= b
->phys_ascent
1557 || a
->phys_height
!= b
->phys_height
1558 || a
->visible_height
!= b
->visible_height
)
1567 /***********************************************************************
1570 See dispextern.h for an overall explanation of glyph pools.
1571 ***********************************************************************/
1573 /* Allocate a glyph_pool structure. The structure returned is
1574 initialized with zeros. The global variable glyph_pool_count is
1575 incremented for each pool allocated. */
1577 static struct glyph_pool
*
1580 struct glyph_pool
*result
;
1582 /* Allocate a new glyph_pool and clear it. */
1583 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1584 bzero (result
, sizeof *result
);
1586 /* For memory leak and double deletion checking. */
1593 /* Free a glyph_pool structure POOL. The function may be called with
1594 a null POOL pointer. The global variable glyph_pool_count is
1595 decremented with every pool structure freed. If this count gets
1596 negative, more structures were freed than allocated, i.e. one
1597 structure must have been freed more than once or a bogus pointer
1598 was passed to free_glyph_pool. */
1601 free_glyph_pool (pool
)
1602 struct glyph_pool
*pool
;
1606 /* More freed than allocated? */
1608 xassert (glyph_pool_count
>= 0);
1610 xfree (pool
->glyphs
);
1616 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1617 columns we need. This function never shrinks a pool. The only
1618 case in which this would make sense, would be when a frame's size
1619 is changed from a large value to a smaller one. But, if someone
1620 does it once, we can expect that he will do it again.
1622 Value is non-zero if the pool changed in a way which makes
1623 re-adjusting window glyph matrices necessary. */
1626 realloc_glyph_pool (pool
, matrix_dim
)
1627 struct glyph_pool
*pool
;
1628 struct dim matrix_dim
;
1633 changed_p
= (pool
->glyphs
== 0
1634 || matrix_dim
.height
!= pool
->nrows
1635 || matrix_dim
.width
!= pool
->ncolumns
);
1637 /* Enlarge the glyph pool. */
1638 needed
= matrix_dim
.width
* matrix_dim
.height
;
1639 if (needed
> pool
->nglyphs
)
1641 int size
= needed
* sizeof (struct glyph
);
1644 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1647 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1648 bzero (pool
->glyphs
, size
);
1651 pool
->nglyphs
= needed
;
1654 /* Remember the number of rows and columns because (a) we use them
1655 to do sanity checks, and (b) the number of columns determines
1656 where rows in the frame matrix start---this must be available to
1657 determine pointers to rows of window sub-matrices. */
1658 pool
->nrows
= matrix_dim
.height
;
1659 pool
->ncolumns
= matrix_dim
.width
;
1666 /***********************************************************************
1668 ***********************************************************************/
1673 /* Flush standard output. This is sometimes useful to call from
1683 /* Check that no glyph pointers have been lost in MATRIX. If a
1684 pointer has been lost, e.g. by using a structure assignment between
1685 rows, at least one pointer must occur more than once in the rows of
1689 check_matrix_pointer_lossage (matrix
)
1690 struct glyph_matrix
*matrix
;
1694 for (i
= 0; i
< matrix
->nrows
; ++i
)
1695 for (j
= 0; j
< matrix
->nrows
; ++j
)
1697 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1698 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1702 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1705 matrix_row (matrix
, row
)
1706 struct glyph_matrix
*matrix
;
1709 xassert (matrix
&& matrix
->rows
);
1710 xassert (row
>= 0 && row
< matrix
->nrows
);
1712 /* That's really too slow for normal testing because this function
1713 is called almost everywhere. Although---it's still astonishingly
1714 fast, so it is valuable to have for debugging purposes. */
1716 check_matrix_pointer_lossage (matrix
);
1719 return matrix
->rows
+ row
;
1723 #if 0 /* This function makes invalid assumptions when text is
1724 partially invisible. But it might come handy for debugging
1727 /* Check invariants that must hold for an up to date current matrix of
1731 check_matrix_invariants (w
)
1734 struct glyph_matrix
*matrix
= w
->current_matrix
;
1735 int yb
= window_text_bottom_y (w
);
1736 struct glyph_row
*row
= matrix
->rows
;
1737 struct glyph_row
*last_text_row
= NULL
;
1738 struct buffer
*saved
= current_buffer
;
1739 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1742 /* This can sometimes happen for a fresh window. */
1743 if (matrix
->nrows
< 2)
1746 set_buffer_temp (buffer
);
1748 /* Note: last row is always reserved for the mode line. */
1749 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1750 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1752 struct glyph_row
*next
= row
+ 1;
1754 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1755 last_text_row
= row
;
1757 /* Check that character and byte positions are in sync. */
1758 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1759 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1761 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1762 have such a position temporarily in case of a minibuffer
1763 displaying something like `[Sole completion]' at its end. */
1764 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1765 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1766 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1768 /* Check that end position of `row' is equal to start position
1770 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1772 xassert (MATRIX_ROW_END_CHARPOS (row
)
1773 == MATRIX_ROW_START_CHARPOS (next
));
1774 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1775 == MATRIX_ROW_START_BYTEPOS (next
));
1780 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1781 xassert (w
->desired_matrix
->rows
!= NULL
);
1782 set_buffer_temp (saved
);
1787 #endif /* GLYPH_DEBUG != 0 */
1791 /**********************************************************************
1792 Allocating/ Adjusting Glyph Matrices
1793 **********************************************************************/
1795 /* Allocate glyph matrices over a window tree for a frame-based
1798 X and Y are column/row within the frame glyph matrix where
1799 sub-matrices for the window tree rooted at WINDOW must be
1800 allocated. CH_DIM contains the dimensions of the smallest
1801 character that could be used during display. DIM_ONLY_P non-zero
1802 means that the caller of this function is only interested in the
1803 result matrix dimension, and matrix adjustments should not be
1806 The function returns the total width/height of the sub-matrices of
1807 the window tree. If called on a frame root window, the computation
1808 will take the mini-buffer window into account.
1810 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1812 NEW_LEAF_MATRIX set if any window in the tree did not have a
1813 glyph matrices yet, and
1815 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1816 any window in the tree will be changed or have been changed (see
1819 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1822 Windows are arranged into chains of windows on the same level
1823 through the next fields of window structures. Such a level can be
1824 either a sequence of horizontally adjacent windows from left to
1825 right, or a sequence of vertically adjacent windows from top to
1826 bottom. Each window in a horizontal sequence can be either a leaf
1827 window or a vertical sequence; a window in a vertical sequence can
1828 be either a leaf or a horizontal sequence. All windows in a
1829 horizontal sequence have the same height, and all windows in a
1830 vertical sequence have the same width.
1832 This function uses, for historical reasons, a more general
1833 algorithm to determine glyph matrix dimensions that would be
1836 The matrix height of a horizontal sequence is determined by the
1837 maximum height of any matrix in the sequence. The matrix width of
1838 a horizontal sequence is computed by adding up matrix widths of
1839 windows in the sequence.
1841 |<------- result width ------->|
1842 +---------+----------+---------+ ---
1845 +---------+ | | result height
1850 The matrix width of a vertical sequence is the maximum matrix width
1851 of any window in the sequence. Its height is computed by adding up
1852 matrix heights of windows in the sequence.
1854 |<---- result width -->|
1862 +------------+---------+ |
1865 +------------+---------+ --- */
1867 /* Bit indicating that a new matrix will be allocated or has been
1870 #define NEW_LEAF_MATRIX (1 << 0)
1872 /* Bit indicating that a matrix will or has changed its location or
1875 #define CHANGED_LEAF_MATRIX (1 << 1)
1878 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1879 window_change_flags
)
1883 int *window_change_flags
;
1885 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1887 int wmax
= 0, hmax
= 0;
1891 int in_horz_combination_p
;
1893 /* What combination is WINDOW part of? Compute this once since the
1894 result is the same for all windows in the `next' chain. The
1895 special case of a root window (parent equal to nil) is treated
1896 like a vertical combination because a root window's `next'
1897 points to the mini-buffer window, if any, which is arranged
1898 vertically below other windows. */
1899 in_horz_combination_p
1900 = (!NILP (XWINDOW (window
)->parent
)
1901 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1903 /* For WINDOW and all windows on the same level. */
1906 w
= XWINDOW (window
);
1908 /* Get the dimension of the window sub-matrix for W, depending
1909 on whether this is a combination or a leaf window. */
1910 if (!NILP (w
->hchild
))
1911 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1913 window_change_flags
);
1914 else if (!NILP (w
->vchild
))
1915 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1917 window_change_flags
);
1920 /* If not already done, allocate sub-matrix structures. */
1921 if (w
->desired_matrix
== NULL
)
1923 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1924 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1925 *window_change_flags
|= NEW_LEAF_MATRIX
;
1928 /* Width and height MUST be chosen so that there are no
1929 holes in the frame matrix. */
1930 dim
.width
= required_matrix_width (w
);
1931 dim
.height
= required_matrix_height (w
);
1933 /* Will matrix be re-allocated? */
1934 if (x
!= w
->desired_matrix
->matrix_x
1935 || y
!= w
->desired_matrix
->matrix_y
1936 || dim
.width
!= w
->desired_matrix
->matrix_w
1937 || dim
.height
!= w
->desired_matrix
->matrix_h
1938 || (margin_glyphs_to_reserve (w
, dim
.width
,
1939 w
->left_margin_cols
)
1940 != w
->desired_matrix
->left_margin_glyphs
)
1941 || (margin_glyphs_to_reserve (w
, dim
.width
,
1942 w
->right_margin_cols
)
1943 != w
->desired_matrix
->right_margin_glyphs
))
1944 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1946 /* Actually change matrices, if allowed. Do not consider
1947 CHANGED_LEAF_MATRIX computed above here because the pool
1948 may have been changed which we don't now here. We trust
1949 that we only will be called with DIM_ONLY_P != 0 when
1953 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1954 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1958 /* If we are part of a horizontal combination, advance x for
1959 windows to the right of W; otherwise advance y for windows
1961 if (in_horz_combination_p
)
1966 /* Remember maximum glyph matrix dimensions. */
1967 wmax
= max (wmax
, dim
.width
);
1968 hmax
= max (hmax
, dim
.height
);
1970 /* Next window on same level. */
1973 while (!NILP (window
));
1975 /* Set `total' to the total glyph matrix dimension of this window
1976 level. In a vertical combination, the width is the width of the
1977 widest window; the height is the y we finally reached, corrected
1978 by the y we started with. In a horizontal combination, the total
1979 height is the height of the tallest window, and the width is the
1980 x we finally reached, corrected by the x we started with. */
1981 if (in_horz_combination_p
)
1983 total
.width
= x
- x0
;
1984 total
.height
= hmax
;
1989 total
.height
= y
- y0
;
1996 /* Return the required height of glyph matrices for window W. */
1999 required_matrix_height (w
)
2002 #ifdef HAVE_WINDOW_SYSTEM
2003 struct frame
*f
= XFRAME (w
->frame
);
2005 if (FRAME_WINDOW_P (f
))
2007 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2008 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
2009 return (((window_pixel_height
+ ch_height
- 1)
2010 / ch_height
) * w
->nrows_scale_factor
2011 /* One partially visible line at the top and
2012 bottom of the window. */
2014 /* 2 for header and mode line. */
2017 #endif /* HAVE_WINDOW_SYSTEM */
2019 return WINDOW_TOTAL_LINES (w
);
2023 /* Return the required width of glyph matrices for window W. */
2026 required_matrix_width (w
)
2029 #ifdef HAVE_WINDOW_SYSTEM
2030 struct frame
*f
= XFRAME (w
->frame
);
2031 if (FRAME_WINDOW_P (f
))
2033 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2034 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2036 /* Compute number of glyphs needed in a glyph row. */
2037 return (((window_pixel_width
+ ch_width
- 1)
2038 / ch_width
) * w
->ncols_scale_factor
2039 /* 2 partially visible columns in the text area. */
2041 /* One partially visible column at the right
2042 edge of each marginal area. */
2045 #endif /* HAVE_WINDOW_SYSTEM */
2047 return XINT (w
->total_cols
);
2051 /* Allocate window matrices for window-based redisplay. W is the
2052 window whose matrices must be allocated/reallocated. CH_DIM is the
2053 size of the smallest character that could potentially be used on W. */
2056 allocate_matrices_for_window_redisplay (w
)
2061 if (!NILP (w
->vchild
))
2062 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2063 else if (!NILP (w
->hchild
))
2064 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2067 /* W is a leaf window. */
2070 /* If matrices are not yet allocated, allocate them now. */
2071 if (w
->desired_matrix
== NULL
)
2073 w
->desired_matrix
= new_glyph_matrix (NULL
);
2074 w
->current_matrix
= new_glyph_matrix (NULL
);
2077 dim
.width
= required_matrix_width (w
);
2078 dim
.height
= required_matrix_height (w
);
2079 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2080 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2083 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2088 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2089 do it for all frames; otherwise do it just for the given frame.
2090 This function must be called when a new frame is created, its size
2091 changes, or its window configuration changes. */
2097 /* Block input so that expose events and other events that access
2098 glyph matrices are not processed while we are changing them. */
2102 adjust_frame_glyphs (f
);
2105 Lisp_Object tail
, lisp_frame
;
2107 FOR_EACH_FRAME (tail
, lisp_frame
)
2108 adjust_frame_glyphs (XFRAME (lisp_frame
));
2115 /* Adjust frame glyphs when Emacs is initialized.
2117 To be called from init_display.
2119 We need a glyph matrix because redraw will happen soon.
2120 Unfortunately, window sizes on selected_frame are not yet set to
2121 meaningful values. I believe we can assume that there are only two
2122 windows on the frame---the mini-buffer and the root window. Frame
2123 height and width seem to be correct so far. So, set the sizes of
2124 windows to estimated values. */
2127 adjust_frame_glyphs_initially ()
2129 struct frame
*sf
= SELECTED_FRAME ();
2130 struct window
*root
= XWINDOW (sf
->root_window
);
2131 struct window
*mini
= XWINDOW (root
->next
);
2132 int frame_lines
= FRAME_LINES (sf
);
2133 int frame_cols
= FRAME_COLS (sf
);
2134 int top_margin
= FRAME_TOP_MARGIN (sf
);
2136 /* Do it for the root window. */
2137 XSETFASTINT (root
->top_line
, top_margin
);
2138 XSETFASTINT (root
->total_cols
, frame_cols
);
2139 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2141 /* Do it for the mini-buffer window. */
2142 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2143 XSETFASTINT (mini
->total_cols
, frame_cols
);
2144 set_window_height (root
->next
, 1, 0);
2146 adjust_frame_glyphs (sf
);
2147 glyphs_initialized_initially_p
= 1;
2151 /* Allocate/reallocate glyph matrices of a single frame F. */
2154 adjust_frame_glyphs (f
)
2157 if (FRAME_WINDOW_P (f
))
2158 adjust_frame_glyphs_for_window_redisplay (f
);
2160 adjust_frame_glyphs_for_frame_redisplay (f
);
2162 /* Don't forget the message buffer and the buffer for
2163 decode_mode_spec. */
2164 adjust_frame_message_buffer (f
);
2165 adjust_decode_mode_spec_buffer (f
);
2167 f
->glyphs_initialized_p
= 1;
2171 /* In the window tree with root W, build current matrices of leaf
2172 windows from the frame's current matrix. */
2175 fake_current_matrices (window
)
2180 for (; !NILP (window
); window
= w
->next
)
2182 w
= XWINDOW (window
);
2184 if (!NILP (w
->hchild
))
2185 fake_current_matrices (w
->hchild
);
2186 else if (!NILP (w
->vchild
))
2187 fake_current_matrices (w
->vchild
);
2191 struct frame
*f
= XFRAME (w
->frame
);
2192 struct glyph_matrix
*m
= w
->current_matrix
;
2193 struct glyph_matrix
*fm
= f
->current_matrix
;
2195 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2196 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2198 for (i
= 0; i
< m
->matrix_h
; ++i
)
2200 struct glyph_row
*r
= m
->rows
+ i
;
2201 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2203 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2204 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2206 r
->enabled_p
= fr
->enabled_p
;
2209 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2210 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2211 r
->used
[TEXT_AREA
] = (m
->matrix_w
2212 - r
->used
[LEFT_MARGIN_AREA
]
2213 - r
->used
[RIGHT_MARGIN_AREA
]);
2222 /* Save away the contents of frame F's current frame matrix. Value is
2223 a glyph matrix holding the contents of F's current frame matrix. */
2225 static struct glyph_matrix
*
2226 save_current_matrix (f
)
2230 struct glyph_matrix
*saved
;
2232 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2233 bzero (saved
, sizeof *saved
);
2234 saved
->nrows
= f
->current_matrix
->nrows
;
2235 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2236 * sizeof *saved
->rows
);
2237 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2239 for (i
= 0; i
< saved
->nrows
; ++i
)
2241 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2242 struct glyph_row
*to
= saved
->rows
+ i
;
2243 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2244 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2245 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2246 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2253 /* Restore the contents of frame F's current frame matrix from SAVED,
2254 and free memory associated with SAVED. */
2257 restore_current_matrix (f
, saved
)
2259 struct glyph_matrix
*saved
;
2263 for (i
= 0; i
< saved
->nrows
; ++i
)
2265 struct glyph_row
*from
= saved
->rows
+ i
;
2266 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2267 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2268 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2269 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2270 xfree (from
->glyphs
[TEXT_AREA
]);
2273 xfree (saved
->rows
);
2279 /* Allocate/reallocate glyph matrices of a single frame F for
2280 frame-based redisplay. */
2283 adjust_frame_glyphs_for_frame_redisplay (f
)
2287 struct dim matrix_dim
;
2289 int window_change_flags
;
2292 if (!FRAME_LIVE_P (f
))
2295 /* Determine the smallest character in any font for F. On
2296 console windows, all characters have dimension (1, 1). */
2297 ch_dim
.width
= ch_dim
.height
= 1;
2299 top_window_y
= FRAME_TOP_MARGIN (f
);
2301 /* Allocate glyph pool structures if not already done. */
2302 if (f
->desired_pool
== NULL
)
2304 f
->desired_pool
= new_glyph_pool ();
2305 f
->current_pool
= new_glyph_pool ();
2308 /* Allocate frames matrix structures if needed. */
2309 if (f
->desired_matrix
== NULL
)
2311 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2312 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2315 /* Compute window glyph matrices. (This takes the mini-buffer
2316 window into account). The result is the size of the frame glyph
2317 matrix needed. The variable window_change_flags is set to a bit
2318 mask indicating whether new matrices will be allocated or
2319 existing matrices change their size or location within the frame
2321 window_change_flags
= 0;
2323 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2326 &window_change_flags
);
2328 /* Add in menu bar lines, if any. */
2329 matrix_dim
.height
+= top_window_y
;
2331 /* Enlarge pools as necessary. */
2332 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2333 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2335 /* Set up glyph pointers within window matrices. Do this only if
2336 absolutely necessary since it requires a frame redraw. */
2337 if (pool_changed_p
|| window_change_flags
)
2339 /* Do it for window matrices. */
2340 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2342 &window_change_flags
);
2344 /* Size of frame matrices must equal size of frame. Note
2345 that we are called for X frames with window widths NOT equal
2346 to the frame width (from CHANGE_FRAME_SIZE_1). */
2347 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2348 && matrix_dim
.height
== FRAME_LINES (f
));
2350 /* Pointers to glyph memory in glyph rows are exchanged during
2351 the update phase of redisplay, which means in general that a
2352 frame's current matrix consists of pointers into both the
2353 desired and current glyph pool of the frame. Adjusting a
2354 matrix sets the frame matrix up so that pointers are all into
2355 the same pool. If we want to preserve glyph contents of the
2356 current matrix over a call to adjust_glyph_matrix, we must
2357 make a copy of the current glyphs, and restore the current
2358 matrix' contents from that copy. */
2359 if (display_completed
2360 && !FRAME_GARBAGED_P (f
)
2361 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2362 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2364 struct glyph_matrix
*copy
= save_current_matrix (f
);
2365 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2366 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2367 restore_current_matrix (f
, copy
);
2368 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2372 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2373 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2374 SET_FRAME_GARBAGED (f
);
2380 /* Allocate/reallocate glyph matrices of a single frame F for
2381 window-based redisplay. */
2384 adjust_frame_glyphs_for_window_redisplay (f
)
2390 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2392 /* Get minimum sizes. */
2393 #ifdef HAVE_WINDOW_SYSTEM
2394 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2395 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2397 ch_dim
.width
= ch_dim
.height
= 1;
2400 /* Allocate/reallocate window matrices. */
2401 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2403 /* Allocate/ reallocate matrices of the dummy window used to display
2404 the menu bar under X when no X toolkit support is available. */
2405 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2407 /* Allocate a dummy window if not already done. */
2408 if (NILP (f
->menu_bar_window
))
2410 f
->menu_bar_window
= make_window ();
2411 w
= XWINDOW (f
->menu_bar_window
);
2412 XSETFRAME (w
->frame
, f
);
2413 w
->pseudo_window_p
= 1;
2416 w
= XWINDOW (f
->menu_bar_window
);
2418 /* Set window dimensions to frame dimensions and allocate or
2419 adjust glyph matrices of W. */
2420 XSETFASTINT (w
->top_line
, 0);
2421 XSETFASTINT (w
->left_col
, 0);
2422 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2423 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2424 allocate_matrices_for_window_redisplay (w
);
2426 #endif /* not USE_X_TOOLKIT */
2429 /* Allocate/ reallocate matrices of the tool bar window. If we
2430 don't have a tool bar window yet, make one. */
2431 if (NILP (f
->tool_bar_window
))
2433 f
->tool_bar_window
= make_window ();
2434 w
= XWINDOW (f
->tool_bar_window
);
2435 XSETFRAME (w
->frame
, f
);
2436 w
->pseudo_window_p
= 1;
2439 w
= XWINDOW (f
->tool_bar_window
);
2441 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2442 XSETFASTINT (w
->left_col
, 0);
2443 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2444 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2445 allocate_matrices_for_window_redisplay (w
);
2450 /* Adjust/ allocate message buffer of frame F.
2452 Note that the message buffer is never freed. Since I could not
2453 find a free in 19.34, I assume that freeing it would be
2454 problematic in some way and don't do it either.
2456 (Implementation note: It should be checked if we can free it
2457 eventually without causing trouble). */
2460 adjust_frame_message_buffer (f
)
2463 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2465 if (FRAME_MESSAGE_BUF (f
))
2467 char *buffer
= FRAME_MESSAGE_BUF (f
);
2468 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2469 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2472 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2476 /* Re-allocate buffer for decode_mode_spec on frame F. */
2479 adjust_decode_mode_spec_buffer (f
)
2482 f
->decode_mode_spec_buffer
2483 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2484 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2489 /**********************************************************************
2490 Freeing Glyph Matrices
2491 **********************************************************************/
2493 /* Free glyph memory for a frame F. F may be null. This function can
2494 be called for the same frame more than once. The root window of
2495 F may be nil when this function is called. This is the case when
2496 the function is called when F is destroyed. */
2502 if (f
&& f
->glyphs_initialized_p
)
2504 /* Block interrupt input so that we don't get surprised by an X
2505 event while we're in an inconsistent state. */
2507 f
->glyphs_initialized_p
= 0;
2509 /* Release window sub-matrices. */
2510 if (!NILP (f
->root_window
))
2511 free_window_matrices (XWINDOW (f
->root_window
));
2513 /* Free the dummy window for menu bars without X toolkit and its
2515 if (!NILP (f
->menu_bar_window
))
2517 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2518 free_glyph_matrix (w
->desired_matrix
);
2519 free_glyph_matrix (w
->current_matrix
);
2520 w
->desired_matrix
= w
->current_matrix
= NULL
;
2521 f
->menu_bar_window
= Qnil
;
2524 /* Free the tool bar window and its glyph matrices. */
2525 if (!NILP (f
->tool_bar_window
))
2527 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2528 free_glyph_matrix (w
->desired_matrix
);
2529 free_glyph_matrix (w
->current_matrix
);
2530 w
->desired_matrix
= w
->current_matrix
= NULL
;
2531 f
->tool_bar_window
= Qnil
;
2534 /* Release frame glyph matrices. Reset fields to zero in
2535 case we are called a second time. */
2536 if (f
->desired_matrix
)
2538 free_glyph_matrix (f
->desired_matrix
);
2539 free_glyph_matrix (f
->current_matrix
);
2540 f
->desired_matrix
= f
->current_matrix
= NULL
;
2543 /* Release glyph pools. */
2544 if (f
->desired_pool
)
2546 free_glyph_pool (f
->desired_pool
);
2547 free_glyph_pool (f
->current_pool
);
2548 f
->desired_pool
= f
->current_pool
= NULL
;
2556 /* Free glyph sub-matrices in the window tree rooted at W. This
2557 function may be called with a null pointer, and it may be called on
2558 the same tree more than once. */
2561 free_window_matrices (w
)
2566 if (!NILP (w
->hchild
))
2567 free_window_matrices (XWINDOW (w
->hchild
));
2568 else if (!NILP (w
->vchild
))
2569 free_window_matrices (XWINDOW (w
->vchild
));
2572 /* This is a leaf window. Free its memory and reset fields
2573 to zero in case this function is called a second time for
2575 free_glyph_matrix (w
->current_matrix
);
2576 free_glyph_matrix (w
->desired_matrix
);
2577 w
->current_matrix
= w
->desired_matrix
= NULL
;
2580 /* Next window on same level. */
2581 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2586 /* Check glyph memory leaks. This function is called from
2587 shut_down_emacs. Note that frames are not destroyed when Emacs
2588 exits. We therefore free all glyph memory for all active frames
2589 explicitly and check that nothing is left allocated. */
2592 check_glyph_memory ()
2594 Lisp_Object tail
, frame
;
2596 /* Free glyph memory for all frames. */
2597 FOR_EACH_FRAME (tail
, frame
)
2598 free_glyphs (XFRAME (frame
));
2600 /* Check that nothing is left allocated. */
2601 if (glyph_matrix_count
)
2603 if (glyph_pool_count
)
2609 /**********************************************************************
2610 Building a Frame Matrix
2611 **********************************************************************/
2613 /* Most of the redisplay code works on glyph matrices attached to
2614 windows. This is a good solution most of the time, but it is not
2615 suitable for terminal code. Terminal output functions cannot rely
2616 on being able to set an arbitrary terminal window. Instead they
2617 must be provided with a view of the whole frame, i.e. the whole
2618 screen. We build such a view by constructing a frame matrix from
2619 window matrices in this section.
2621 Windows that must be updated have their must_be_update_p flag set.
2622 For all such windows, their desired matrix is made part of the
2623 desired frame matrix. For other windows, their current matrix is
2624 made part of the desired frame matrix.
2626 +-----------------+----------------+
2627 | desired | desired |
2629 +-----------------+----------------+
2632 +----------------------------------+
2634 Desired window matrices can be made part of the frame matrix in a
2635 cheap way: We exploit the fact that the desired frame matrix and
2636 desired window matrices share their glyph memory. This is not
2637 possible for current window matrices. Their glyphs are copied to
2638 the desired frame matrix. The latter is equivalent to
2639 preserve_other_columns in the old redisplay.
2641 Used glyphs counters for frame matrix rows are the result of adding
2642 up glyph lengths of the window matrices. A line in the frame
2643 matrix is enabled, if a corresponding line in a window matrix is
2646 After building the desired frame matrix, it will be passed to
2647 terminal code, which will manipulate both the desired and current
2648 frame matrix. Changes applied to the frame's current matrix have
2649 to be visible in current window matrices afterwards, of course.
2651 This problem is solved like this:
2653 1. Window and frame matrices share glyphs. Window matrices are
2654 constructed in a way that their glyph contents ARE the glyph
2655 contents needed in a frame matrix. Thus, any modification of
2656 glyphs done in terminal code will be reflected in window matrices
2659 2. Exchanges of rows in a frame matrix done by terminal code are
2660 intercepted by hook functions so that corresponding row operations
2661 on window matrices can be performed. This is necessary because we
2662 use pointers to glyphs in glyph row structures. To satisfy the
2663 assumption of point 1 above that glyphs are updated implicitly in
2664 window matrices when they are manipulated via the frame matrix,
2665 window and frame matrix must of course agree where to find the
2666 glyphs for their rows. Possible manipulations that must be
2667 mirrored are assignments of rows of the desired frame matrix to the
2668 current frame matrix and scrolling the current frame matrix. */
2670 /* Build frame F's desired matrix from window matrices. Only windows
2671 which have the flag must_be_updated_p set have to be updated. Menu
2672 bar lines of a frame are not covered by window matrices, so make
2673 sure not to touch them in this function. */
2676 build_frame_matrix (f
)
2681 /* F must have a frame matrix when this function is called. */
2682 xassert (!FRAME_WINDOW_P (f
));
2684 /* Clear all rows in the frame matrix covered by window matrices.
2685 Menu bar lines are not covered by windows. */
2686 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2687 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2689 /* Build the matrix by walking the window tree. */
2690 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2691 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2695 /* Walk a window tree, building a frame matrix MATRIX from window
2696 matrices. W is the root of a window tree. */
2699 build_frame_matrix_from_window_tree (matrix
, w
)
2700 struct glyph_matrix
*matrix
;
2705 if (!NILP (w
->hchild
))
2706 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2707 else if (!NILP (w
->vchild
))
2708 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2710 build_frame_matrix_from_leaf_window (matrix
, w
);
2712 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2717 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2718 desired frame matrix built. W is a leaf window whose desired or
2719 current matrix is to be added to FRAME_MATRIX. W's flag
2720 must_be_updated_p determines which matrix it contributes to
2721 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2722 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2723 Adding a desired matrix means setting up used counters and such in
2724 frame rows, while adding a current window matrix to FRAME_MATRIX
2725 means copying glyphs. The latter case corresponds to
2726 preserve_other_columns in the old redisplay. */
2729 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2730 struct glyph_matrix
*frame_matrix
;
2733 struct glyph_matrix
*window_matrix
;
2734 int window_y
, frame_y
;
2735 /* If non-zero, a glyph to insert at the right border of W. */
2736 GLYPH right_border_glyph
= 0;
2738 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2739 if (w
->must_be_updated_p
)
2741 window_matrix
= w
->desired_matrix
;
2743 /* Decide whether we want to add a vertical border glyph. */
2744 if (!WINDOW_RIGHTMOST_P (w
))
2746 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2749 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2750 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2753 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2755 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2759 window_matrix
= w
->current_matrix
;
2761 /* For all rows in the window matrix and corresponding rows in the
2764 frame_y
= window_matrix
->matrix_y
;
2765 while (window_y
< window_matrix
->nrows
)
2767 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2768 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2769 int current_row_p
= window_matrix
== w
->current_matrix
;
2771 /* Fill up the frame row with spaces up to the left margin of the
2773 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2775 /* Fill up areas in the window matrix row with spaces. */
2776 fill_up_glyph_row_with_spaces (window_row
);
2778 /* If only part of W's desired matrix has been built, and
2779 window_row wasn't displayed, use the corresponding current
2781 if (window_matrix
== w
->desired_matrix
2782 && !window_row
->enabled_p
)
2784 window_row
= w
->current_matrix
->rows
+ window_y
;
2790 /* Copy window row to frame row. */
2791 bcopy (window_row
->glyphs
[0],
2792 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2793 window_matrix
->matrix_w
* sizeof (struct glyph
));
2797 xassert (window_row
->enabled_p
);
2799 /* Only when a desired row has been displayed, we want
2800 the corresponding frame row to be updated. */
2801 frame_row
->enabled_p
= 1;
2803 /* Maybe insert a vertical border between horizontally adjacent
2805 if (right_border_glyph
)
2807 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2808 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2812 /* Window row window_y must be a slice of frame row
2814 xassert (glyph_row_slice_p (window_row
, frame_row
));
2816 /* If rows are in sync, we don't have to copy glyphs because
2817 frame and window share glyphs. */
2819 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2820 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2824 /* Set number of used glyphs in the frame matrix. Since we fill
2825 up with spaces, and visit leaf windows from left to right it
2826 can be done simply. */
2827 frame_row
->used
[TEXT_AREA
]
2828 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2836 /* Given a user-specified glyph, possibly including a Lisp-level face
2837 ID, return a glyph that has a realized face ID.
2838 This is used for glyphs displayed specially and not part of the text;
2839 for instance, vertical separators, truncation markers, etc. */
2842 spec_glyph_lookup_face (w
, glyph
)
2846 int lface_id
= FAST_GLYPH_FACE (glyph
);
2847 /* Convert the glyph's specified face to a realized (cache) face. */
2850 int face_id
= merge_faces (XFRAME (w
->frame
),
2851 Qt
, lface_id
, DEFAULT_FACE_ID
);
2853 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2858 /* Add spaces to a glyph row ROW in a window matrix.
2860 Each row has the form:
2862 +---------+-----------------------------+------------+
2863 | left | text | right |
2864 +---------+-----------------------------+------------+
2866 Left and right marginal areas are optional. This function adds
2867 spaces to areas so that there are no empty holes between areas.
2868 In other words: If the right area is not empty, the text area
2869 is filled up with spaces up to the right area. If the text area
2870 is not empty, the left area is filled up.
2872 To be called for frame-based redisplay, only. */
2875 fill_up_glyph_row_with_spaces (row
)
2876 struct glyph_row
*row
;
2878 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2879 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2880 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2884 /* Fill area AREA of glyph row ROW with spaces. To be called for
2885 frame-based redisplay only. */
2888 fill_up_glyph_row_area_with_spaces (row
, area
)
2889 struct glyph_row
*row
;
2892 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2894 struct glyph
*end
= row
->glyphs
[area
+ 1];
2895 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2898 *text
++ = space_glyph
;
2899 row
->used
[area
] = text
- row
->glyphs
[area
];
2904 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2905 reached. In frame matrices only one area, TEXT_AREA, is used. */
2908 fill_up_frame_row_with_spaces (row
, upto
)
2909 struct glyph_row
*row
;
2912 int i
= row
->used
[TEXT_AREA
];
2913 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2916 glyph
[i
++] = space_glyph
;
2918 row
->used
[TEXT_AREA
] = i
;
2923 /**********************************************************************
2924 Mirroring operations on frame matrices in window matrices
2925 **********************************************************************/
2927 /* Set frame being updated via frame-based redisplay to F. This
2928 function must be called before updates to make explicit that we are
2929 working on frame matrices or not. */
2932 set_frame_matrix_frame (f
)
2935 frame_matrix_frame
= f
;
2939 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2940 DESIRED_MATRIX is the desired matrix corresponding to
2941 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2942 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2943 frame_matrix_frame is non-null, this indicates that the exchange is
2944 done in frame matrices, and that we have to perform analogous
2945 operations in window matrices of frame_matrix_frame. */
2948 make_current (desired_matrix
, current_matrix
, row
)
2949 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2952 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2953 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2954 int mouse_face_p
= current_row
->mouse_face_p
;
2956 /* Do current_row = desired_row. This exchanges glyph pointers
2957 between both rows, and does a structure assignment otherwise. */
2958 assign_row (current_row
, desired_row
);
2960 /* Enable current_row to mark it as valid. */
2961 current_row
->enabled_p
= 1;
2962 current_row
->mouse_face_p
= mouse_face_p
;
2964 /* If we are called on frame matrices, perform analogous operations
2965 for window matrices. */
2966 if (frame_matrix_frame
)
2967 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2971 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2972 W's frame which has been made current (by swapping pointers between
2973 current and desired matrix). Perform analogous operations in the
2974 matrices of leaf windows in the window tree rooted at W. */
2977 mirror_make_current (w
, frame_row
)
2983 if (!NILP (w
->hchild
))
2984 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2985 else if (!NILP (w
->vchild
))
2986 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2989 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2990 here because the checks performed in debug mode there
2991 will not allow the conversion. */
2992 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2994 /* If FRAME_ROW is within W, assign the desired row to the
2995 current row (exchanging glyph pointers). */
2996 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2998 struct glyph_row
*current_row
2999 = MATRIX_ROW (w
->current_matrix
, row
);
3000 struct glyph_row
*desired_row
3001 = MATRIX_ROW (w
->desired_matrix
, row
);
3003 if (desired_row
->enabled_p
)
3004 assign_row (current_row
, desired_row
);
3006 swap_glyph_pointers (desired_row
, current_row
);
3007 current_row
->enabled_p
= 1;
3011 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3016 /* Perform row dance after scrolling. We are working on the range of
3017 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3018 including) in MATRIX. COPY_FROM is a vector containing, for each
3019 row I in the range 0 <= I < NLINES, the index of the original line
3020 to move to I. This index is relative to the row range, i.e. 0 <=
3021 index < NLINES. RETAINED_P is a vector containing zero for each
3022 row 0 <= I < NLINES which is empty.
3024 This function is called from do_scrolling and do_direct_scrolling. */
3027 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3029 struct glyph_matrix
*matrix
;
3030 int unchanged_at_top
, nlines
;
3034 /* A copy of original rows. */
3035 struct glyph_row
*old_rows
;
3037 /* Rows to assign to. */
3038 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3042 /* Make a copy of the original rows. */
3043 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3044 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3046 /* Assign new rows, maybe clear lines. */
3047 for (i
= 0; i
< nlines
; ++i
)
3049 int enabled_before_p
= new_rows
[i
].enabled_p
;
3051 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3052 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3053 new_rows
[i
] = old_rows
[copy_from
[i
]];
3054 new_rows
[i
].enabled_p
= enabled_before_p
;
3056 /* RETAINED_P is zero for empty lines. */
3057 if (!retained_p
[copy_from
[i
]])
3058 new_rows
[i
].enabled_p
= 0;
3061 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3062 if (frame_matrix_frame
)
3063 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3064 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3068 /* Synchronize glyph pointers in the current matrix of window W with
3069 the current frame matrix. */
3072 sync_window_with_frame_matrix_rows (w
)
3075 struct frame
*f
= XFRAME (w
->frame
);
3076 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3077 int left
, right
, x
, width
;
3079 /* Preconditions: W must be a leaf window on a tty frame. */
3080 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3081 xassert (!FRAME_WINDOW_P (f
));
3083 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3084 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3085 x
= w
->current_matrix
->matrix_x
;
3086 width
= w
->current_matrix
->matrix_w
;
3088 window_row
= w
->current_matrix
->rows
;
3089 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3090 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3092 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3094 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3095 = frame_row
->glyphs
[0] + x
;
3096 window_row
->glyphs
[TEXT_AREA
]
3097 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3098 window_row
->glyphs
[LAST_AREA
]
3099 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3100 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3101 = window_row
->glyphs
[LAST_AREA
] - right
;
3106 /* Return the window in the window tree rooted in W containing frame
3107 row ROW. Value is null if none is found. */
3110 frame_row_to_window (w
, row
)
3114 struct window
*found
= NULL
;
3118 if (!NILP (w
->hchild
))
3119 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3120 else if (!NILP (w
->vchild
))
3121 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3122 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3123 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3126 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3133 /* Perform a line dance in the window tree rooted at W, after
3134 scrolling a frame matrix in mirrored_line_dance.
3136 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3137 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3138 COPY_FROM is a vector containing, for each row I in the range 0 <=
3139 I < NLINES, the index of the original line to move to I. This
3140 index is relative to the row range, i.e. 0 <= index < NLINES.
3141 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3145 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3147 int unchanged_at_top
, nlines
;
3153 if (!NILP (w
->hchild
))
3154 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3155 nlines
, copy_from
, retained_p
);
3156 else if (!NILP (w
->vchild
))
3157 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3158 nlines
, copy_from
, retained_p
);
3161 /* W is a leaf window, and we are working on its current
3163 struct glyph_matrix
*m
= w
->current_matrix
;
3165 struct glyph_row
*old_rows
;
3167 /* Make a copy of the original rows of matrix m. */
3168 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3169 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3171 for (i
= 0; i
< nlines
; ++i
)
3173 /* Frame relative line assigned to. */
3174 int frame_to
= i
+ unchanged_at_top
;
3176 /* Frame relative line assigned. */
3177 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3179 /* Window relative line assigned to. */
3180 int window_to
= frame_to
- m
->matrix_y
;
3182 /* Window relative line assigned. */
3183 int window_from
= frame_from
- m
->matrix_y
;
3185 /* Is assigned line inside window? */
3186 int from_inside_window_p
3187 = window_from
>= 0 && window_from
< m
->matrix_h
;
3189 /* Is assigned to line inside window? */
3190 int to_inside_window_p
3191 = window_to
>= 0 && window_to
< m
->matrix_h
;
3193 if (from_inside_window_p
&& to_inside_window_p
)
3195 /* Enabled setting before assignment. */
3196 int enabled_before_p
;
3198 /* Do the assignment. The enabled_p flag is saved
3199 over the assignment because the old redisplay did
3201 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3202 m
->rows
[window_to
] = old_rows
[window_from
];
3203 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3205 /* If frame line is empty, window line is empty, too. */
3206 if (!retained_p
[copy_from
[i
]])
3207 m
->rows
[window_to
].enabled_p
= 0;
3209 else if (to_inside_window_p
)
3211 /* A copy between windows. This is an infrequent
3212 case not worth optimizing. */
3213 struct frame
*f
= XFRAME (w
->frame
);
3214 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3216 struct glyph_matrix
*m2
;
3219 w2
= frame_row_to_window (root
, frame_from
);
3220 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3221 -nw', FROM_FRAME sometimes has no associated window.
3222 This check avoids a segfault if W2 is null. */
3225 m2
= w2
->current_matrix
;
3226 m2_from
= frame_from
- m2
->matrix_y
;
3227 copy_row_except_pointers (m
->rows
+ window_to
,
3228 m2
->rows
+ m2_from
);
3230 /* If frame line is empty, window line is empty, too. */
3231 if (!retained_p
[copy_from
[i
]])
3232 m
->rows
[window_to
].enabled_p
= 0;
3236 else if (from_inside_window_p
)
3240 /* If there was a copy between windows, make sure glyph
3241 pointers are in sync with the frame matrix. */
3243 sync_window_with_frame_matrix_rows (w
);
3245 /* Check that no pointers are lost. */
3249 /* Next window on same level. */
3250 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3257 /* Check that window and frame matrices agree about their
3258 understanding where glyphs of the rows are to find. For each
3259 window in the window tree rooted at W, check that rows in the
3260 matrices of leaf window agree with their frame matrices about
3264 check_window_matrix_pointers (w
)
3269 if (!NILP (w
->hchild
))
3270 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3271 else if (!NILP (w
->vchild
))
3272 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3275 struct frame
*f
= XFRAME (w
->frame
);
3276 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3277 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3280 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3285 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3286 a window and FRAME_MATRIX is the corresponding frame matrix. For
3287 each row in WINDOW_MATRIX check that it's a slice of the
3288 corresponding frame row. If it isn't, abort. */
3291 check_matrix_pointers (window_matrix
, frame_matrix
)
3292 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3294 /* Row number in WINDOW_MATRIX. */
3297 /* Row number corresponding to I in FRAME_MATRIX. */
3298 int j
= window_matrix
->matrix_y
;
3300 /* For all rows check that the row in the window matrix is a
3301 slice of the row in the frame matrix. If it isn't we didn't
3302 mirror an operation on the frame matrix correctly. */
3303 while (i
< window_matrix
->nrows
)
3305 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3306 frame_matrix
->rows
+ j
))
3312 #endif /* GLYPH_DEBUG != 0 */
3316 /**********************************************************************
3317 VPOS and HPOS translations
3318 **********************************************************************/
3322 /* Translate vertical position VPOS which is relative to window W to a
3323 vertical position relative to W's frame. */
3326 window_to_frame_vpos (w
, vpos
)
3330 struct frame
*f
= XFRAME (w
->frame
);
3332 xassert (!FRAME_WINDOW_P (f
));
3333 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3334 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3335 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3340 /* Translate horizontal position HPOS which is relative to window W to
3341 a horizontal position relative to W's frame. */
3344 window_to_frame_hpos (w
, hpos
)
3348 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3349 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3353 #endif /* GLYPH_DEBUG */
3357 /**********************************************************************
3359 **********************************************************************/
3361 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3362 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3368 CHECK_LIVE_FRAME (frame
);
3371 /* Ignore redraw requests, if frame has no glyphs yet.
3372 (Implementation note: It still has to be checked why we are
3373 called so early here). */
3374 if (!glyphs_initialized_initially_p
)
3378 if (FRAME_MSDOS_P (f
))
3379 set_terminal_modes ();
3381 clear_current_matrices (f
);
3384 windows_or_buffers_changed
++;
3385 /* Mark all windows as inaccurate, so that every window will have
3386 its redisplay done. */
3387 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3388 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3394 /* Redraw frame F. This is nothing more than a call to the Lisp
3395 function redraw-frame. */
3402 XSETFRAME (frame
, f
);
3403 Fredraw_frame (frame
);
3407 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3408 doc
: /* Clear and redisplay all visible frames. */)
3411 Lisp_Object tail
, frame
;
3413 FOR_EACH_FRAME (tail
, frame
)
3414 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3415 Fredraw_frame (frame
);
3421 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3422 visible frames marked as garbaged. */
3425 redraw_garbaged_frames ()
3427 Lisp_Object tail
, frame
;
3429 FOR_EACH_FRAME (tail
, frame
)
3430 if (FRAME_VISIBLE_P (XFRAME (frame
))
3431 && FRAME_GARBAGED_P (XFRAME (frame
)))
3432 Fredraw_frame (frame
);
3437 /***********************************************************************
3439 ***********************************************************************/
3441 /* Try to update display and current glyph matrix directly.
3443 This function is called after a character G has been inserted into
3444 current_buffer. It tries to update the current glyph matrix and
3445 perform appropriate screen output to reflect the insertion. If it
3446 succeeds, the global flag redisplay_performed_directly_p will be
3447 set to 1, and thereby prevent the more costly general redisplay
3448 from running (see redisplay_internal).
3450 This function is not called for `hairy' character insertions.
3451 In particular, it is not called when after or before change
3452 functions exist, like they are used by font-lock. See keyboard.c
3453 for details where this function is called. */
3456 direct_output_for_insert (g
)
3459 register struct frame
*f
= SELECTED_FRAME ();
3460 struct window
*w
= XWINDOW (selected_window
);
3462 struct glyph_row
*glyph_row
;
3463 struct glyph
*glyphs
, *glyph
, *end
;
3465 /* Non-null means that redisplay of W is based on window matrices. */
3466 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3467 /* Non-null means we are in overwrite mode. */
3468 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3470 struct text_pos pos
;
3471 int delta
, delta_bytes
;
3473 /* Not done directly. */
3474 redisplay_performed_directly_p
= 0;
3476 /* Quickly give up for some common cases. */
3477 if (cursor_in_echo_area
3478 /* Give up if fonts have changed. */
3480 /* Give up if face attributes have been changed. */
3481 || face_change_count
3482 /* Give up if cursor position not really known. */
3483 || !display_completed
3484 /* Give up if buffer appears in two places. */
3485 || buffer_shared
> 1
3486 /* Give up if currently displaying a message instead of the
3487 minibuffer contents. */
3488 || (EQ (selected_window
, minibuf_window
)
3489 && EQ (minibuf_window
, echo_area_window
))
3490 /* Give up for hscrolled mini-buffer because display of the prompt
3491 is handled specially there (see display_line). */
3492 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3493 /* Give up if overwriting in the middle of a line. */
3496 && FETCH_BYTE (PT
) != '\n')
3497 /* Give up for tabs and line ends. */
3501 /* Give up if unable to display the cursor in the window. */
3502 || w
->cursor
.vpos
< 0
3503 /* Give up if we are showing a message or just cleared the message
3504 because we might need to resize the echo area window. */
3505 || !NILP (echo_area_buffer
[0])
3506 || !NILP (echo_area_buffer
[1])
3507 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3508 /* Can't do it in a continued line because continuation
3509 lines would change. */
3510 (glyph_row
->continued_p
3511 || glyph_row
->exact_window_width_line_p
3512 /* Can't use this method if the line overlaps others or is
3513 overlapped by others because these other lines would
3514 have to be redisplayed. */
3515 || glyph_row
->overlapping_p
3516 || glyph_row
->overlapped_p
))
3517 /* Can't do it for partial width windows on terminal frames
3518 because we can't clear to eol in such a window. */
3519 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3522 /* If we can't insert glyphs, we can use this method only
3523 at the end of a line. */
3524 if (!char_ins_del_ok
)
3525 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3528 /* Set up a display iterator structure for W. Glyphs will be
3529 produced in scratch_glyph_row. Current position is W's cursor
3531 clear_glyph_row (&scratch_glyph_row
);
3532 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3533 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3534 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3537 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3538 if (glyph_row
->mouse_face_p
)
3541 /* Give up if highlighting trailing whitespace and we have trailing
3542 whitespace in glyph_row. We would have to remove the trailing
3543 whitespace face in that case. */
3544 if (!NILP (Vshow_trailing_whitespace
)
3545 && glyph_row
->used
[TEXT_AREA
])
3549 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3550 if (last
->type
== STRETCH_GLYPH
3551 || (last
->type
== CHAR_GLYPH
3552 && last
->u
.ch
== ' '))
3556 /* Give up if there are overlay strings at pos. This would fail
3557 if the overlay string has newlines in it. */
3558 if (STRINGP (it
.string
))
3561 it
.hpos
= w
->cursor
.hpos
;
3562 it
.vpos
= w
->cursor
.vpos
;
3563 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3564 it
.current_y
= w
->cursor
.y
;
3565 it
.end_charpos
= PT
;
3566 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3567 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3569 /* More than one display element may be returned for PT - 1 if
3570 (i) it's a control character which is translated into `\003' or
3571 `^C', or (ii) it has a display table entry, or (iii) it's a
3572 combination of both. */
3573 delta
= delta_bytes
= 0;
3574 while (get_next_display_element (&it
))
3576 PRODUCE_GLYPHS (&it
);
3578 /* Give up if glyph doesn't fit completely on the line. */
3579 if (it
.current_x
>= it
.last_visible_x
)
3582 /* Give up if new glyph has different ascent or descent than
3583 the original row, or if it is not a character glyph. */
3584 if (glyph_row
->ascent
!= it
.ascent
3585 || glyph_row
->height
!= it
.ascent
+ it
.descent
3586 || glyph_row
->phys_ascent
!= it
.phys_ascent
3587 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3588 || it
.what
!= IT_CHARACTER
)
3592 delta_bytes
+= it
.len
;
3593 set_iterator_to_next (&it
, 1);
3596 /* Give up if we hit the right edge of the window. We would have
3597 to insert truncation or continuation glyphs. */
3598 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3599 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3602 /* Give up if there is a \t following in the line. */
3604 it2
.end_charpos
= ZV
;
3605 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3606 while (get_next_display_element (&it2
)
3607 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3611 set_iterator_to_next (&it2
, 1);
3614 /* Number of new glyphs produced. */
3615 n
= it
.glyph_row
->used
[TEXT_AREA
];
3617 /* Start and end of glyphs in original row. */
3618 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3619 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3621 /* Make room for new glyphs, then insert them. */
3622 xassert (end
- glyphs
- n
>= 0);
3623 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3624 (end
- glyphs
- n
) * sizeof (*end
));
3625 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3626 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3627 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3629 /* Compute new line width. */
3630 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3631 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3632 glyph_row
->pixel_width
= glyph_row
->x
;
3635 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3639 /* Increment buffer positions for glyphs following the newly
3641 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3642 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3643 glyph
->charpos
+= delta
;
3645 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3647 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3648 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3651 /* Adjust positions in lines following the one we are in. */
3652 increment_matrix_positions (w
->current_matrix
,
3654 w
->current_matrix
->nrows
,
3655 delta
, delta_bytes
);
3657 glyph_row
->contains_overlapping_glyphs_p
3658 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3660 glyph_row
->displays_text_p
= 1;
3661 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3662 XFASTINT (w
->window_end_vpos
)));
3664 if (!NILP (Vshow_trailing_whitespace
))
3665 highlight_trailing_whitespace (it
.f
, glyph_row
);
3667 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3668 In the middle, we have to insert glyphs. Note that this is now
3669 implemented for X frames. The implementation uses updated_window
3671 updated_row
= glyph_row
;
3672 updated_area
= TEXT_AREA
;
3676 rif
->update_window_begin_hook (w
);
3678 if (glyphs
== end
- n
3679 /* In front of a space added by append_space. */
3680 || (glyphs
== end
- n
- 1
3681 && (end
- n
)->charpos
<= 0))
3682 rif
->write_glyphs (glyphs
, n
);
3684 rif
->insert_glyphs (glyphs
, n
);
3688 if (glyphs
== end
- n
)
3689 write_glyphs (glyphs
, n
);
3691 insert_glyphs (glyphs
, n
);
3694 w
->cursor
.hpos
+= n
;
3695 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3696 xassert (w
->cursor
.hpos
>= 0
3697 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3699 /* How to set the cursor differs depending on whether we are
3700 using a frame matrix or a window matrix. Note that when
3701 a frame matrix is used, cursor_to expects frame coordinates,
3702 and the X and Y parameters are not used. */
3703 if (window_redisplay_p
)
3704 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3705 w
->cursor
.y
, w
->cursor
.x
);
3709 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3710 + (INTEGERP (w
->left_margin_cols
)
3711 ? XFASTINT (w
->left_margin_cols
)
3713 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3717 #ifdef HAVE_WINDOW_SYSTEM
3718 update_window_fringes (w
, 0);
3722 rif
->update_window_end_hook (w
, 1, 0);
3727 TRACE ((stderr
, "direct output for insert\n"));
3728 mark_window_display_accurate (it
.window
, 1);
3729 redisplay_performed_directly_p
= 1;
3734 /* Perform a direct display update for moving PT by N positions
3735 left or right. N < 0 means a movement backwards. This function
3736 is currently only called for N == 1 or N == -1. */
3739 direct_output_forward_char (n
)
3742 struct frame
*f
= SELECTED_FRAME ();
3743 struct window
*w
= XWINDOW (selected_window
);
3744 struct glyph_row
*row
;
3746 /* Give up if point moved out of or into a composition. */
3747 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3748 current_buffer
, PT
))
3751 /* Give up if face attributes have been changed. */
3752 if (face_change_count
)
3755 /* Give up if current matrix is not up to date or we are
3756 displaying a message. */
3757 if (!display_completed
|| cursor_in_echo_area
)
3760 /* Give up if the buffer's direction is reversed. */
3761 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3764 /* Can't use direct output if highlighting a region. */
3765 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3768 /* Can't use direct output if highlighting trailing whitespace. */
3769 if (!NILP (Vshow_trailing_whitespace
))
3772 /* Give up if we are showing a message or just cleared the message
3773 because we might need to resize the echo area window. */
3774 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3777 /* Give up if currently displaying a message instead of the
3778 minibuffer contents. */
3779 if (XWINDOW (minibuf_window
) == w
3780 && EQ (minibuf_window
, echo_area_window
))
3783 /* Give up if we don't know where the cursor is. */
3784 if (w
->cursor
.vpos
< 0)
3787 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3789 /* Give up if PT is outside of the last known cursor row. */
3790 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3791 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3794 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3796 w
->last_cursor
= w
->cursor
;
3797 XSETFASTINT (w
->last_point
, PT
);
3799 xassert (w
->cursor
.hpos
>= 0
3800 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3802 if (FRAME_WINDOW_P (f
))
3803 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3804 w
->cursor
.y
, w
->cursor
.x
);
3808 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3809 + (INTEGERP (w
->left_margin_cols
)
3810 ? XFASTINT (w
->left_margin_cols
)
3812 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3817 redisplay_performed_directly_p
= 1;
3823 /***********************************************************************
3825 ***********************************************************************/
3827 /* Update frame F based on the data in desired matrices.
3829 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3830 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3833 Value is non-zero if redisplay was stopped due to pending input. */
3836 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3839 int inhibit_hairy_id_p
;
3841 /* 1 means display has been paused because of pending input. */
3843 struct window
*root_window
= XWINDOW (f
->root_window
);
3845 #if PERIODIC_PREEMPTION_CHECKING
3846 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3849 double p
= XFLOATINT (Vredisplay_preemption_period
);
3853 usec
= (p
- sec
) * 1000000;
3855 EMACS_GET_TIME (tm
);
3856 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3857 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3861 if (FRAME_WINDOW_P (f
))
3863 /* We are working on window matrix basis. All windows whose
3864 flag must_be_updated_p is set have to be updated. */
3866 /* Record that we are not working on frame matrices. */
3867 set_frame_matrix_frame (NULL
);
3869 /* Update all windows in the window tree of F, maybe stopping
3870 when pending input is detected. */
3873 /* Update the menu bar on X frames that don't have toolkit
3875 if (WINDOWP (f
->menu_bar_window
))
3876 update_window (XWINDOW (f
->menu_bar_window
), 1);
3878 /* Update the tool-bar window, if present. */
3879 if (WINDOWP (f
->tool_bar_window
))
3881 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3883 /* Update tool-bar window. */
3884 if (w
->must_be_updated_p
)
3888 update_window (w
, 1);
3889 w
->must_be_updated_p
= 0;
3891 /* Swap tool-bar strings. We swap because we want to
3893 tem
= f
->current_tool_bar_string
;
3894 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3895 f
->desired_tool_bar_string
= tem
;
3900 /* Update windows. */
3901 paused_p
= update_window_tree (root_window
, force_p
);
3904 /* This flush is a performance bottleneck under X,
3905 and it doesn't seem to be necessary anyway (in general).
3906 It is necessary when resizing the window with the mouse, or
3907 at least the fringes are not redrawn in a timely manner. ++kfs */
3908 if (f
->force_flush_display_p
)
3910 rif
->flush_display (f
);
3911 f
->force_flush_display_p
= 0;
3916 /* We are working on frame matrix basis. Set the frame on whose
3917 frame matrix we operate. */
3918 set_frame_matrix_frame (f
);
3920 /* Build F's desired matrix from window matrices. */
3921 build_frame_matrix (f
);
3923 /* Update the display */
3925 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3929 fflush (termscript
);
3932 /* Check window matrices for lost pointers. */
3934 check_window_matrix_pointers (root_window
);
3935 add_frame_display_history (f
, paused_p
);
3939 /* Reset flags indicating that a window should be updated. */
3940 set_window_update_flags (root_window
, 0);
3942 display_completed
= !paused_p
;
3948 /************************************************************************
3949 Window-based updates
3950 ************************************************************************/
3952 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3953 don't stop updating when input is pending. */
3956 update_window_tree (w
, force_p
)
3962 while (w
&& !paused_p
)
3964 if (!NILP (w
->hchild
))
3965 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3966 else if (!NILP (w
->vchild
))
3967 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3968 else if (w
->must_be_updated_p
)
3969 paused_p
|= update_window (w
, force_p
);
3971 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3978 /* Update window W if its flag must_be_updated_p is non-zero. If
3979 FORCE_P is non-zero, don't stop updating if input is pending. */
3982 update_single_window (w
, force_p
)
3986 if (w
->must_be_updated_p
)
3988 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3990 /* Record that this is not a frame-based redisplay. */
3991 set_frame_matrix_frame (NULL
);
3993 #if PERIODIC_PREEMPTION_CHECKING
3994 if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3997 double p
= XFLOATINT (Vredisplay_preemption_period
);
4001 usec
= (p
- sec
) * 1000000;
4003 EMACS_GET_TIME (tm
);
4004 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4005 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4011 update_window (w
, force_p
);
4014 /* Reset flag in W. */
4015 w
->must_be_updated_p
= 0;
4019 #ifdef HAVE_WINDOW_SYSTEM
4021 /* Redraw lines from the current matrix of window W that are
4022 overlapped by other rows. YB is bottom-most y-position in W. */
4025 redraw_overlapped_rows (w
, yb
)
4031 /* If rows overlapping others have been changed, the rows being
4032 overlapped have to be redrawn. This won't draw lines that have
4033 already been drawn in update_window_line because overlapped_p in
4034 desired rows is 0, so after row assignment overlapped_p in
4035 current rows is 0. */
4036 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4038 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4040 if (!row
->enabled_p
)
4042 else if (row
->mode_line_p
)
4045 if (row
->overlapped_p
)
4047 enum glyph_row_area area
;
4049 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4052 updated_area
= area
;
4053 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
4054 if (row
->used
[area
])
4055 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
4056 rif
->clear_end_of_line (-1);
4059 row
->overlapped_p
= 0;
4062 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4068 /* Redraw lines from the current matrix of window W that overlap
4069 others. YB is bottom-most y-position in W. */
4072 redraw_overlapping_rows (w
, yb
)
4077 struct glyph_row
*row
;
4079 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4081 row
= w
->current_matrix
->rows
+ i
;
4083 if (!row
->enabled_p
)
4085 else if (row
->mode_line_p
)
4088 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4090 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4094 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4095 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4096 overlaps
|= OVERLAPS_PRED
;
4097 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4098 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4099 overlaps
|= OVERLAPS_SUCC
;
4103 if (row
->used
[LEFT_MARGIN_AREA
])
4104 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4106 if (row
->used
[TEXT_AREA
])
4107 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4109 if (row
->used
[RIGHT_MARGIN_AREA
])
4110 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4112 /* Record in neighbour rows that ROW overwrites part of
4114 if (overlaps
& OVERLAPS_PRED
)
4115 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4116 if (overlaps
& OVERLAPS_SUCC
)
4117 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4126 #endif /* HAVE_WINDOW_SYSTEM */
4131 /* Check that no row in the current matrix of window W is enabled
4132 which is below what's displayed in the window. */
4135 check_current_matrix_flags (w
)
4138 int last_seen_p
= 0;
4139 int i
, yb
= window_text_bottom_y (w
);
4141 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4143 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4144 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4146 else if (last_seen_p
&& row
->enabled_p
)
4151 #endif /* GLYPH_DEBUG */
4154 /* Update display of window W. FORCE_P non-zero means that we should
4155 not stop when detecting pending input. */
4158 update_window (w
, force_p
)
4162 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4164 #if !PERIODIC_PREEMPTION_CHECKING
4165 int preempt_count
= baud_rate
/ 2400 + 1;
4167 extern int input_pending
;
4168 extern Lisp_Object do_mouse_tracking
;
4170 /* Check that W's frame doesn't have glyph matrices. */
4171 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4172 xassert (updating_frame
!= NULL
);
4175 /* Check pending input the first time so that we can quickly return. */
4176 if (redisplay_dont_pause
)
4178 #if PERIODIC_PREEMPTION_CHECKING
4179 else if (NILP (Vredisplay_preemption_period
))
4183 detect_input_pending_ignore_squeezables ();
4186 /* If forced to complete the update, or if no input is pending, do
4188 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4190 struct glyph_row
*row
, *end
;
4191 struct glyph_row
*mode_line_row
;
4192 struct glyph_row
*header_line_row
;
4193 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4195 rif
->update_window_begin_hook (w
);
4196 yb
= window_text_bottom_y (w
);
4198 /* If window has a header line, update it before everything else.
4199 Adjust y-positions of other rows by the header line height. */
4200 row
= desired_matrix
->rows
;
4201 end
= row
+ desired_matrix
->nrows
- 1;
4203 if (row
->mode_line_p
)
4205 header_line_row
= row
;
4209 header_line_row
= NULL
;
4211 /* Update the mode line, if necessary. */
4212 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4213 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4215 mode_line_row
->y
= yb
;
4216 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4218 &mouse_face_overwritten_p
);
4221 /* Find first enabled row. Optimizations in redisplay_internal
4222 may lead to an update with only one row enabled. There may
4223 be also completely empty matrices. */
4224 while (row
< end
&& !row
->enabled_p
)
4227 /* Try reusing part of the display by copying. */
4228 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4230 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4233 /* All rows were found to be equal. */
4239 /* We've scrolled the display. */
4245 /* Update the rest of the lines. */
4246 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4249 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4252 /* We'll have to play a little bit with when to
4253 detect_input_pending. If it's done too often,
4254 scrolling large windows with repeated scroll-up
4255 commands will too quickly pause redisplay. */
4256 #if PERIODIC_PREEMPTION_CHECKING
4260 EMACS_GET_TIME (tm
);
4261 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4262 if (EMACS_TIME_NEG_P (dif
))
4264 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4265 detect_input_pending_ignore_squeezables ();
4269 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4270 detect_input_pending_ignore_squeezables ();
4272 changed_p
|= update_window_line (w
, vpos
,
4273 &mouse_face_overwritten_p
);
4275 /* Mark all rows below the last visible one in the current
4276 matrix as invalid. This is necessary because of
4277 variable line heights. Consider the case of three
4278 successive redisplays, where the first displays 5
4279 lines, the second 3 lines, and the third 5 lines again.
4280 If the second redisplay wouldn't mark rows in the
4281 current matrix invalid, the third redisplay might be
4282 tempted to optimize redisplay based on lines displayed
4283 in the first redisplay. */
4284 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4285 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4286 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4289 /* Was display preempted? */
4290 paused_p
= row
< end
;
4294 /* Update the header line after scrolling because a new header
4295 line would otherwise overwrite lines at the top of the window
4296 that can be scrolled. */
4297 if (header_line_row
&& header_line_row
->enabled_p
)
4299 header_line_row
->y
= 0;
4300 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4303 /* Fix the appearance of overlapping/overlapped rows. */
4304 if (!paused_p
&& !w
->pseudo_window_p
)
4306 #ifdef HAVE_WINDOW_SYSTEM
4307 if (changed_p
&& rif
->fix_overlapping_area
)
4309 redraw_overlapped_rows (w
, yb
);
4310 redraw_overlapping_rows (w
, yb
);
4314 /* Make cursor visible at cursor position of W. */
4315 set_window_cursor_after_update (w
);
4317 #if 0 /* Check that current matrix invariants are satisfied. This is
4318 for debugging only. See the comment of check_matrix_invariants. */
4319 IF_DEBUG (check_matrix_invariants (w
));
4324 /* Remember the redisplay method used to display the matrix. */
4325 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4328 #ifdef HAVE_WINDOW_SYSTEM
4329 update_window_fringes (w
, 0);
4332 /* End the update of window W. Don't set the cursor if we
4333 paused updating the display because in this case,
4334 set_window_cursor_after_update hasn't been called, and
4335 output_cursor doesn't contain the cursor location. */
4336 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4342 /* check_current_matrix_flags (w); */
4343 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4346 clear_glyph_matrix (desired_matrix
);
4352 /* Update the display of area AREA in window W, row number VPOS.
4353 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4356 update_marginal_area (w
, area
, vpos
)
4360 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4362 /* Let functions in xterm.c know what area subsequent X positions
4363 will be relative to. */
4364 updated_area
= area
;
4366 /* Set cursor to start of glyphs, write them, and clear to the end
4367 of the area. I don't think that something more sophisticated is
4368 necessary here, since marginal areas will not be the default. */
4369 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4370 if (desired_row
->used
[area
])
4371 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4372 rif
->clear_end_of_line (-1);
4376 /* Update the display of the text area of row VPOS in window W.
4377 Value is non-zero if display has changed. */
4380 update_text_area (w
, vpos
)
4384 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4385 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4388 /* Let functions in xterm.c know what area subsequent X positions
4389 will be relative to. */
4390 updated_area
= TEXT_AREA
;
4392 /* If rows are at different X or Y, or rows have different height,
4393 or the current row is marked invalid, write the entire line. */
4394 if (!current_row
->enabled_p
4395 || desired_row
->y
!= current_row
->y
4396 || desired_row
->ascent
!= current_row
->ascent
4397 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4398 || desired_row
->phys_height
!= current_row
->phys_height
4399 || desired_row
->visible_height
!= current_row
->visible_height
4400 || current_row
->overlapped_p
4401 || current_row
->mouse_face_p
4402 || current_row
->x
!= desired_row
->x
)
4404 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4406 if (desired_row
->used
[TEXT_AREA
])
4407 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4408 desired_row
->used
[TEXT_AREA
]);
4410 /* Clear to end of window. */
4411 rif
->clear_end_of_line (-1);
4414 /* This erases the cursor. We do this here because
4415 notice_overwritten_cursor cannot easily check this, which
4416 might indicate that the whole functionality of
4417 notice_overwritten_cursor would better be implemented here.
4418 On the other hand, we need notice_overwritten_cursor as long
4419 as mouse highlighting is done asynchronously outside of
4421 if (vpos
== w
->phys_cursor
.vpos
)
4422 w
->phys_cursor_on_p
= 0;
4427 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4428 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4429 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4430 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4432 /* If the desired row extends its face to the text area end, and
4433 unless the current row also does so at the same position,
4434 make sure we write at least one glyph, so that the face
4435 extension actually takes place. */
4436 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4437 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4438 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4439 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4442 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4446 /* Loop over glyphs that current and desired row may have
4452 /* Skip over glyphs that both rows have in common. These
4453 don't have to be written. We can't skip if the last
4454 current glyph overlaps the glyph to its right. For
4455 example, consider a current row of `if ' with the `f' in
4456 Courier bold so that it overlaps the ` ' to its right.
4457 If the desired row is ` ', we would skip over the space
4458 after the `if' and there would remain a pixel from the
4459 `f' on the screen. */
4460 if (overlapping_glyphs_p
&& i
> 0)
4462 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4465 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4467 can_skip_p
= right
== 0;
4473 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4475 x
+= desired_glyph
->pixel_width
;
4476 ++desired_glyph
, ++current_glyph
, ++i
;
4479 /* Consider the case that the current row contains "xxx
4480 ppp ggg" in italic Courier font, and the desired row
4481 is "xxx ggg". The character `p' has lbearing, `g'
4482 has not. The loop above will stop in front of the
4483 first `p' in the current row. If we would start
4484 writing glyphs there, we wouldn't erase the lbearing
4485 of the `p'. The rest of the lbearing problem is then
4486 taken care of by draw_glyphs. */
4487 if (overlapping_glyphs_p
4489 && i
< current_row
->used
[TEXT_AREA
]
4490 && (current_row
->used
[TEXT_AREA
]
4491 != desired_row
->used
[TEXT_AREA
]))
4495 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4497 while (left
> 0 && i
> 0)
4499 --i
, --desired_glyph
, --current_glyph
;
4500 x
-= desired_glyph
->pixel_width
;
4501 left
-= desired_glyph
->pixel_width
;
4506 /* Try to avoid writing the entire rest of the desired row
4507 by looking for a resync point. This mainly prevents
4508 mode line flickering in the case the mode line is in
4509 fixed-pitch font, which it usually will be. */
4510 if (i
< desired_row
->used
[TEXT_AREA
])
4512 int start_x
= x
, start_hpos
= i
;
4513 struct glyph
*start
= desired_glyph
;
4515 int skip_first_p
= !can_skip_p
;
4517 /* Find the next glyph that's equal again. */
4520 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4523 x
+= desired_glyph
->pixel_width
;
4524 current_x
+= current_glyph
->pixel_width
;
4525 ++desired_glyph
, ++current_glyph
, ++i
;
4529 if (i
== start_hpos
|| x
!= current_x
)
4533 desired_glyph
= start
;
4537 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4538 rif
->write_glyphs (start
, i
- start_hpos
);
4543 /* Write the rest. */
4544 if (i
< desired_row
->used
[TEXT_AREA
])
4546 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4547 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4551 /* Maybe clear to end of line. */
4552 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4554 /* If new row extends to the end of the text area, nothing
4555 has to be cleared, if and only if we did a write_glyphs
4556 above. This is made sure by setting desired_stop_pos
4557 appropriately above. */
4558 xassert (i
< desired_row
->used
[TEXT_AREA
]
4559 || ((desired_row
->used
[TEXT_AREA
]
4560 == current_row
->used
[TEXT_AREA
])
4561 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4563 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4565 /* If old row extends to the end of the text area, clear. */
4566 if (i
>= desired_row
->used
[TEXT_AREA
])
4567 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4568 desired_row
->pixel_width
);
4569 rif
->clear_end_of_line (-1);
4572 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4574 /* Otherwise clear to the end of the old row. Everything
4575 after that position should be clear already. */
4578 if (i
>= desired_row
->used
[TEXT_AREA
])
4579 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4580 desired_row
->pixel_width
);
4582 /* If cursor is displayed at the end of the line, make sure
4583 it's cleared. Nowadays we don't have a phys_cursor_glyph
4584 with which to erase the cursor (because this method
4585 doesn't work with lbearing/rbearing), so we must do it
4587 if (vpos
== w
->phys_cursor
.vpos
4588 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4590 w
->phys_cursor_on_p
= 0;
4594 x
= current_row
->pixel_width
;
4595 rif
->clear_end_of_line (x
);
4604 /* Update row VPOS in window W. Value is non-zero if display has been
4608 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4610 int vpos
, *mouse_face_overwritten_p
;
4612 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4613 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4616 /* Set the row being updated. This is important to let xterm.c
4617 know what line height values are in effect. */
4618 updated_row
= desired_row
;
4620 /* A row can be completely invisible in case a desired matrix was
4621 built with a vscroll and then make_cursor_line_fully_visible shifts
4622 the matrix. Make sure to make such rows current anyway, since
4623 we need the correct y-position, for example, in the current matrix. */
4624 if (desired_row
->mode_line_p
4625 || desired_row
->visible_height
> 0)
4627 xassert (desired_row
->enabled_p
);
4629 /* Update display of the left margin area, if there is one. */
4630 if (!desired_row
->full_width_p
4631 && !NILP (w
->left_margin_cols
))
4634 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4637 /* Update the display of the text area. */
4638 if (update_text_area (w
, vpos
))
4641 if (current_row
->mouse_face_p
)
4642 *mouse_face_overwritten_p
= 1;
4645 /* Update display of the right margin area, if there is one. */
4646 if (!desired_row
->full_width_p
4647 && !NILP (w
->right_margin_cols
))
4650 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4653 /* Draw truncation marks etc. */
4654 if (!current_row
->enabled_p
4655 || desired_row
->y
!= current_row
->y
4656 || desired_row
->visible_height
!= current_row
->visible_height
4657 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4658 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4659 || current_row
->redraw_fringe_bitmaps_p
4660 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4661 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4662 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4663 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4664 rif
->after_update_window_line_hook (desired_row
);
4667 /* Update current_row from desired_row. */
4668 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4674 /* Set the cursor after an update of window W. This function may only
4675 be called from update_window. */
4678 set_window_cursor_after_update (w
)
4681 struct frame
*f
= XFRAME (w
->frame
);
4682 int cx
, cy
, vpos
, hpos
;
4684 /* Not intended for frame matrix updates. */
4685 xassert (FRAME_WINDOW_P (f
));
4687 if (cursor_in_echo_area
4688 && !NILP (echo_area_buffer
[0])
4689 /* If we are showing a message instead of the mini-buffer,
4690 show the cursor for the message instead. */
4691 && XWINDOW (minibuf_window
) == w
4692 && EQ (minibuf_window
, echo_area_window
)
4693 /* These cases apply only to the frame that contains
4694 the active mini-buffer window. */
4695 && FRAME_HAS_MINIBUF_P (f
)
4696 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4698 cx
= cy
= vpos
= hpos
= 0;
4700 if (cursor_in_echo_area
>= 0)
4702 /* If the mini-buffer is several lines high, find the last
4703 line that has any text on it. Note: either all lines
4704 are enabled or none. Otherwise we wouldn't be able to
4706 struct glyph_row
*row
, *last_row
;
4707 struct glyph
*glyph
;
4708 int yb
= window_text_bottom_y (w
);
4711 row
= w
->current_matrix
->rows
;
4712 while (row
->enabled_p
4713 && (last_row
== NULL
4714 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4716 if (row
->used
[TEXT_AREA
]
4717 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4724 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4725 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4727 while (last
> start
&& last
->charpos
< 0)
4730 for (glyph
= start
; glyph
< last
; ++glyph
)
4732 cx
+= glyph
->pixel_width
;
4737 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4745 hpos
= w
->cursor
.hpos
;
4746 vpos
= w
->cursor
.vpos
;
4749 /* Window cursor can be out of sync for horizontally split windows. */
4750 hpos
= max (0, hpos
);
4751 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4752 vpos
= max (0, vpos
);
4753 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4754 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4758 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4759 tree rooted at W. */
4762 set_window_update_flags (w
, on_p
)
4768 if (!NILP (w
->hchild
))
4769 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4770 else if (!NILP (w
->vchild
))
4771 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4773 w
->must_be_updated_p
= on_p
;
4775 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4781 /***********************************************************************
4782 Window-Based Scrolling
4783 ***********************************************************************/
4785 /* Structure describing rows in scrolling_window. */
4789 /* Number of occurrences of this row in desired and current matrix. */
4790 int old_uses
, new_uses
;
4792 /* Vpos of row in new matrix. */
4793 int new_line_number
;
4795 /* Bucket index of this row_entry in the hash table row_table. */
4798 /* The row described by this entry. */
4799 struct glyph_row
*row
;
4801 /* Hash collision chain. */
4802 struct row_entry
*next
;
4805 /* A pool to allocate row_entry structures from, and the size of the
4806 pool. The pool is reallocated in scrolling_window when we find
4807 that we need a larger one. */
4809 static struct row_entry
*row_entry_pool
;
4810 static int row_entry_pool_size
;
4812 /* Index of next free entry in row_entry_pool. */
4814 static int row_entry_idx
;
4816 /* The hash table used during scrolling, and the table's size. This
4817 table is used to quickly identify equal rows in the desired and
4820 static struct row_entry
**row_table
;
4821 static int row_table_size
;
4823 /* Vectors of pointers to row_entry structures belonging to the
4824 current and desired matrix, and the size of the vectors. */
4826 static struct row_entry
**old_lines
, **new_lines
;
4827 static int old_lines_size
, new_lines_size
;
4829 /* A pool to allocate run structures from, and its size. */
4831 static struct run
*run_pool
;
4832 static int runs_size
;
4834 /* A vector of runs of lines found during scrolling. */
4836 static struct run
**runs
;
4838 /* Add glyph row ROW to the scrolling hash table during the scrolling
4841 static INLINE
struct row_entry
*
4842 add_row_entry (w
, row
)
4844 struct glyph_row
*row
;
4846 struct row_entry
*entry
;
4847 int i
= row
->hash
% row_table_size
;
4849 entry
= row_table
[i
];
4850 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4851 entry
= entry
->next
;
4855 entry
= row_entry_pool
+ row_entry_idx
++;
4857 entry
->old_uses
= entry
->new_uses
= 0;
4858 entry
->new_line_number
= 0;
4860 entry
->next
= row_table
[i
];
4861 row_table
[i
] = entry
;
4868 /* Try to reuse part of the current display of W by scrolling lines.
4869 HEADER_LINE_P non-zero means W has a header line.
4871 The algorithm is taken from Communications of the ACM, Apr78 "A
4872 Technique for Isolating Differences Between Files." It should take
4875 A short outline of the steps of the algorithm
4877 1. Skip lines equal at the start and end of both matrices.
4879 2. Enter rows in the current and desired matrix into a symbol
4880 table, counting how often they appear in both matrices.
4882 3. Rows that appear exactly once in both matrices serve as anchors,
4883 i.e. we assume that such lines are likely to have been moved.
4885 4. Starting from anchor lines, extend regions to be scrolled both
4886 forward and backward.
4890 -1 if all rows were found to be equal.
4891 0 to indicate that we did not scroll the display, or
4892 1 if we did scroll. */
4895 scrolling_window (w
, header_line_p
)
4899 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4900 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4901 int yb
= window_text_bottom_y (w
);
4902 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4903 int nruns
, nbytes
, n
, run_idx
;
4904 struct row_entry
*entry
;
4906 /* Skip over rows equal at the start. */
4907 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4909 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4910 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4914 && !d
->redraw_fringe_bitmaps_p
4916 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4917 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4918 && row_equal_p (w
, c
, d
, 1))
4927 /* Give up if some rows in the desired matrix are not enabled. */
4928 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4931 first_old
= first_new
= i
;
4933 /* Set last_new to the index + 1 of the last enabled row in the
4936 while (i
< desired_matrix
->nrows
- 1
4937 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4938 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4941 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4946 /* Set last_old to the index + 1 of the last enabled row in the
4947 current matrix. We don't look at the enabled flag here because
4948 we plan to reuse part of the display even if other parts are
4951 while (i
< current_matrix
->nrows
- 1)
4953 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4962 /* Skip over rows equal at the bottom. */
4965 while (i
- 1 > first_new
4966 && j
- 1 > first_old
4967 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4968 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4969 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4970 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4972 MATRIX_ROW (desired_matrix
, i
- 1),
4973 MATRIX_ROW (current_matrix
, j
- 1), 1))
4978 /* Nothing to do if all rows are equal. */
4979 if (last_new
== first_new
)
4982 /* Reallocate vectors, tables etc. if necessary. */
4984 if (current_matrix
->nrows
> old_lines_size
)
4986 old_lines_size
= current_matrix
->nrows
;
4987 nbytes
= old_lines_size
* sizeof *old_lines
;
4988 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4991 if (desired_matrix
->nrows
> new_lines_size
)
4993 new_lines_size
= desired_matrix
->nrows
;
4994 nbytes
= new_lines_size
* sizeof *new_lines
;
4995 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4998 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4999 if (3 * n
> row_table_size
)
5001 row_table_size
= next_almost_prime (3 * n
);
5002 nbytes
= row_table_size
* sizeof *row_table
;
5003 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5004 bzero (row_table
, nbytes
);
5007 if (n
> row_entry_pool_size
)
5009 row_entry_pool_size
= n
;
5010 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5011 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5014 if (desired_matrix
->nrows
> runs_size
)
5016 runs_size
= desired_matrix
->nrows
;
5017 nbytes
= runs_size
* sizeof *runs
;
5018 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5019 nbytes
= runs_size
* sizeof *run_pool
;
5020 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5023 nruns
= run_idx
= 0;
5026 /* Add rows from the current and desired matrix to the hash table
5027 row_hash_table to be able to find equal ones quickly. */
5029 for (i
= first_old
; i
< last_old
; ++i
)
5031 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5033 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5034 old_lines
[i
] = entry
;
5038 old_lines
[i
] = NULL
;
5041 for (i
= first_new
; i
< last_new
; ++i
)
5043 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5044 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5046 entry
->new_line_number
= i
;
5047 new_lines
[i
] = entry
;
5050 /* Identify moves based on lines that are unique and equal
5051 in both matrices. */
5052 for (i
= first_old
; i
< last_old
;)
5054 && old_lines
[i
]->old_uses
== 1
5055 && old_lines
[i
]->new_uses
== 1)
5058 int new_line
= old_lines
[i
]->new_line_number
;
5059 struct run
*run
= run_pool
+ run_idx
++;
5062 run
->current_vpos
= i
;
5063 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5064 run
->desired_vpos
= new_line
;
5065 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5067 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5069 /* Extend backward. */
5072 while (j
> first_old
5074 && old_lines
[j
] == new_lines
[k
])
5076 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5077 --run
->current_vpos
;
5078 --run
->desired_vpos
;
5081 run
->desired_y
-= h
;
5082 run
->current_y
-= h
;
5086 /* Extend forward. */
5091 && old_lines
[j
] == new_lines
[k
])
5093 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5099 /* Insert run into list of all runs. Order runs by copied
5100 pixel lines. Note that we record runs that don't have to
5101 be copied because they are already in place. This is done
5102 because we can avoid calling update_window_line in this
5104 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5106 for (k
= nruns
; k
> j
; --k
)
5107 runs
[k
] = runs
[k
- 1];
5116 /* Do the moves. Do it in a way that we don't overwrite something
5117 we want to copy later on. This is not solvable in general
5118 because there is only one display and we don't have a way to
5119 exchange areas on this display. Example:
5121 +-----------+ +-----------+
5123 +-----------+ --> +-----------+
5125 +-----------+ +-----------+
5127 Instead, prefer bigger moves, and invalidate moves that would
5128 copy from where we copied to. */
5130 for (i
= 0; i
< nruns
; ++i
)
5131 if (runs
[i
]->nrows
> 0)
5133 struct run
*r
= runs
[i
];
5135 /* Copy on the display. */
5136 if (r
->current_y
!= r
->desired_y
)
5138 rif
->scroll_run_hook (w
, r
);
5140 /* Invalidate runs that copy from where we copied to. */
5141 for (j
= i
+ 1; j
< nruns
; ++j
)
5143 struct run
*p
= runs
[j
];
5145 if ((p
->current_y
>= r
->desired_y
5146 && p
->current_y
< r
->desired_y
+ r
->height
)
5147 || (p
->current_y
+ p
->height
>= r
->desired_y
5148 && (p
->current_y
+ p
->height
5149 < r
->desired_y
+ r
->height
)))
5154 /* Assign matrix rows. */
5155 for (j
= 0; j
< r
->nrows
; ++j
)
5157 struct glyph_row
*from
, *to
;
5158 int to_overlapped_p
;
5160 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5161 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5162 to_overlapped_p
= to
->overlapped_p
;
5163 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5164 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5165 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5166 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5167 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5168 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5169 from
->redraw_fringe_bitmaps_p
= 1;
5170 assign_row (to
, from
);
5171 to
->enabled_p
= 1, from
->enabled_p
= 0;
5172 to
->overlapped_p
= to_overlapped_p
;
5176 /* Clear the hash table, for the next time. */
5177 for (i
= 0; i
< row_entry_idx
; ++i
)
5178 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5180 /* Value is > 0 to indicate that we scrolled the display. */
5186 /************************************************************************
5188 ************************************************************************/
5190 /* Update the desired frame matrix of frame F.
5192 FORCE_P non-zero means that the update should not be stopped by
5193 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5194 should not be tried.
5196 Value is non-zero if update was stopped due to pending input. */
5199 update_frame_1 (f
, force_p
, inhibit_id_p
)
5204 /* Frame matrices to work on. */
5205 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5206 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5209 int preempt_count
= baud_rate
/ 2400 + 1;
5210 extern int input_pending
;
5212 xassert (current_matrix
&& desired_matrix
);
5214 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5215 calculate_costs (f
);
5217 if (preempt_count
<= 0)
5220 if (redisplay_dont_pause
)
5222 #if PERIODIC_PREEMPTION_CHECKING
5223 else if (NILP (Vredisplay_preemption_period
))
5226 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5233 /* If we cannot insert/delete lines, it's no use trying it. */
5234 if (!line_ins_del_ok
)
5237 /* See if any of the desired lines are enabled; don't compute for
5238 i/d line if just want cursor motion. */
5239 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5240 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5243 /* Try doing i/d line, if not yet inhibited. */
5244 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5245 force_p
|= scrolling (f
);
5247 /* Update the individual lines as needed. Do bottom line first. */
5248 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5249 update_frame_line (f
, desired_matrix
->nrows
- 1);
5251 /* Now update the rest of the lines. */
5252 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5254 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5256 if (FRAME_TERMCAP_P (f
))
5258 /* Flush out every so many lines.
5259 Also flush out if likely to have more than 1k buffered
5260 otherwise. I'm told that some telnet connections get
5261 really screwed by more than 1k output at once. */
5262 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5264 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5267 if (preempt_count
== 1)
5269 #ifdef EMACS_OUTQSIZE
5270 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5271 /* Probably not a tty. Ignore the error and reset
5273 outq
= PENDING_OUTPUT_COUNT (stdout
);
5276 if (baud_rate
<= outq
&& baud_rate
> 0)
5277 sleep (outq
/ baud_rate
);
5282 #if PERIODIC_PREEMPTION_CHECKING
5286 EMACS_GET_TIME (tm
);
5287 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5288 if (EMACS_TIME_NEG_P (dif
))
5290 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5291 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
6489 it does the redisplay.
6491 It's also much like Fsit_for, except that it can be used for
6492 waiting for input as well. */
6495 sit_for (sec
, usec
, reading
, display
, initial_display
)
6496 int sec
, usec
, reading
, display
, initial_display
;
6498 int preempt
= (sec
>= 0) || (sec
== 0 && usec
>= 0);
6500 swallow_events (display
);
6502 if ((detect_input_pending_run_timers (display
) && preempt
)
6503 || !NILP (Vexecuting_kbd_macro
))
6506 if (initial_display
)
6508 int count
= SPECPDL_INDEX ();
6510 specbind (Qredisplay_dont_pause
, Qt
);
6511 redisplay_preserve_echo_area (2);
6512 unbind_to (count
, Qnil
);
6515 if (sec
== 0 && usec
== 0)
6522 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6525 return detect_input_pending () ? Qnil
: Qt
;
6529 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6530 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6531 SECONDS may be a floating-point value, meaning that you can wait for a
6532 fraction of a second.
6533 \(Not all operating systems support waiting for a fraction of a second.)
6534 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6535 Redisplay is preempted as always if input arrives, and does not happen
6536 if input is available before it starts.
6537 Value is t if waited the full time with no input arriving.
6539 Redisplay will occur even when input is available if SECONDS is negative.
6541 An obsolete but still supported form is
6542 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6543 Where the optional arg MILLISECONDS specifies an additional wait period,
6544 in milliseconds; this was useful when Emacs was built without
6545 floating point support.
6546 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6548 /* The `old-nodisp' stuff is there so that the arglist has the correct
6549 length. Otherwise, `defdvice' will redefine it with fewer args. */
6550 (seconds
, milliseconds
, nodisp
)
6551 Lisp_Object seconds
, milliseconds
, nodisp
;
6555 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6557 nodisp
= milliseconds
;
6558 milliseconds
= Qnil
;
6561 if (NILP (milliseconds
))
6562 XSETINT (milliseconds
, 0);
6564 CHECK_NUMBER (milliseconds
);
6565 usec
= XINT (milliseconds
) * 1000;
6568 double duration
= extract_float (seconds
);
6569 sec
= (int) duration
;
6570 usec
+= (duration
- sec
) * 1000000;
6573 #ifndef EMACS_HAS_USECS
6574 if (usec
!= 0 && sec
== 0)
6575 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6578 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6583 /***********************************************************************
6584 Other Lisp Functions
6585 ***********************************************************************/
6587 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6588 session's frames, frame names, buffers, buffer-read-only flags, and
6589 buffer-modified-flags. */
6591 static Lisp_Object frame_and_buffer_state
;
6594 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6595 Sframe_or_buffer_changed_p
, 0, 1, 0,
6596 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6597 VARIABLE is a variable name whose value is either nil or a state vector
6598 that will be updated to contain all frames and buffers,
6599 aside from buffers whose names start with space,
6600 along with the buffers' read-only and modified flags. This allows a fast
6601 check to see whether buffer menus might need to be recomputed.
6602 If this function returns non-nil, it updates the internal vector to reflect
6605 If VARIABLE is nil, an internal variable is used. Users should not
6606 pass nil for VARIABLE. */)
6608 Lisp_Object variable
;
6610 Lisp_Object state
, tail
, frame
, buf
;
6611 Lisp_Object
*vecp
, *end
;
6614 if (! NILP (variable
))
6616 CHECK_SYMBOL (variable
);
6617 state
= Fsymbol_value (variable
);
6618 if (! VECTORP (state
))
6622 state
= frame_and_buffer_state
;
6624 vecp
= XVECTOR (state
)->contents
;
6625 end
= vecp
+ XVECTOR (state
)->size
;
6627 FOR_EACH_FRAME (tail
, frame
)
6631 if (!EQ (*vecp
++, frame
))
6635 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6638 /* Check that the buffer info matches. */
6639 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6641 buf
= XCDR (XCAR (tail
));
6642 /* Ignore buffers that aren't included in buffer lists. */
6643 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6647 if (!EQ (*vecp
++, buf
))
6651 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6655 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6660 /* Detect deletion of a buffer at the end of the list. */
6661 if (EQ (*vecp
, Qlambda
))
6664 /* Come here if we decide the data has changed. */
6666 /* Count the size we will need.
6667 Start with 1 so there is room for at least one lambda at the end. */
6669 FOR_EACH_FRAME (tail
, frame
)
6671 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6673 /* Reallocate the vector if data has grown to need it,
6674 or if it has shrunk a lot. */
6675 if (! VECTORP (state
)
6676 || n
> XVECTOR (state
)->size
6677 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6678 /* Add 20 extra so we grow it less often. */
6680 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6681 if (! NILP (variable
))
6682 Fset (variable
, state
);
6684 frame_and_buffer_state
= state
;
6687 /* Record the new data in the (possibly reallocated) vector. */
6688 vecp
= XVECTOR (state
)->contents
;
6689 FOR_EACH_FRAME (tail
, frame
)
6692 *vecp
++ = XFRAME (frame
)->name
;
6694 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6696 buf
= XCDR (XCAR (tail
));
6697 /* Ignore buffers that aren't included in buffer lists. */
6698 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6701 *vecp
++ = XBUFFER (buf
)->read_only
;
6702 *vecp
++ = Fbuffer_modified_p (buf
);
6704 /* Fill up the vector with lambdas (always at least one). */
6706 while (vecp
- XVECTOR (state
)->contents
6707 < XVECTOR (state
)->size
)
6709 /* Make sure we didn't overflow the vector. */
6710 if (vecp
- XVECTOR (state
)->contents
6711 > XVECTOR (state
)->size
)
6718 /***********************************************************************
6720 ***********************************************************************/
6722 char *terminal_type
;
6724 /* Initialization done when Emacs fork is started, before doing stty.
6725 Determine terminal type and set terminal_driver. Then invoke its
6726 decoding routine to set up variables in the terminal package. */
6731 #ifdef HAVE_X_WINDOWS
6732 extern int display_arg
;
6735 /* Construct the space glyph. */
6736 space_glyph
.type
= CHAR_GLYPH
;
6737 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6738 space_glyph
.charpos
= -1;
6742 cursor_in_echo_area
= 0;
6743 terminal_type
= (char *) 0;
6745 /* Now is the time to initialize this; it's used by init_sys_modes
6747 Vwindow_system
= Qnil
;
6749 /* If the user wants to use a window system, we shouldn't bother
6750 initializing the terminal. This is especially important when the
6751 terminal is so dumb that emacs gives up before and doesn't bother
6752 using the window system.
6754 If the DISPLAY environment variable is set and nonempty,
6755 try to use X, and die with an error message if that doesn't work. */
6757 #ifdef HAVE_X_WINDOWS
6758 if (! inhibit_window_system
&& ! display_arg
)
6762 display
= getenv ("DECW$DISPLAY");
6764 display
= getenv ("DISPLAY");
6767 display_arg
= (display
!= 0 && *display
!= 0);
6769 if (display_arg
&& !x_display_ok (display
))
6771 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6773 inhibit_window_system
= 1;
6777 if (!inhibit_window_system
&& display_arg
6783 Vwindow_system
= intern ("x");
6785 Vwindow_system_version
= make_number (11);
6787 Vwindow_system_version
= make_number (10);
6789 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6790 /* In some versions of ncurses,
6791 tputs crashes if we have not called tgetent.
6793 { char b
[2044]; tgetent (b
, "xterm");}
6795 adjust_frame_glyphs_initially ();
6798 #endif /* HAVE_X_WINDOWS */
6801 if (!inhibit_window_system
)
6803 Vwindow_system
= intern ("w32");
6804 Vwindow_system_version
= make_number (1);
6805 adjust_frame_glyphs_initially ();
6808 #endif /* HAVE_NTGUI */
6811 if (!inhibit_window_system
)
6813 Vwindow_system
= intern ("mac");
6814 Vwindow_system_version
= make_number (1);
6815 adjust_frame_glyphs_initially ();
6820 /* If no window system has been specified, try to use the terminal. */
6823 fatal ("standard input is not a tty");
6827 /* Look at the TERM variable. */
6828 terminal_type
= (char *) getenv ("TERM");
6832 fprintf (stderr
, "Please specify your terminal type.\n\
6833 For types defined in VMS, use set term /device=TYPE.\n\
6834 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6835 \(The quotation marks are necessary since terminal types are lower case.)\n");
6837 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6843 /* VMS DCL tends to up-case things, so down-case term type.
6844 Hardly any uppercase letters in terminal types; should be none. */
6846 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6849 strcpy (new, terminal_type
);
6851 for (p
= new; *p
; p
++)
6855 terminal_type
= new;
6859 term_init (terminal_type
);
6862 struct frame
*sf
= SELECTED_FRAME ();
6863 int width
= FRAME_TOTAL_COLS (sf
);
6864 int height
= FRAME_LINES (sf
);
6866 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6868 /* If these sizes are so big they cause overflow, just ignore the
6869 change. It's not clear what better we could do. */
6870 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6871 fatal ("screen size %dx%d too big", width
, height
);
6874 adjust_frame_glyphs_initially ();
6875 calculate_costs (XFRAME (selected_frame
));
6880 #endif /* CANNOT_DUMP */
6881 signal (SIGWINCH
, window_change_signal
);
6882 #endif /* SIGWINCH */
6884 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6888 /* The MSDOS terminal turns on its ``window system'' relatively
6889 late into the startup, so we cannot do the frame faces'
6890 initialization just yet. It will be done later by pc-win.el
6891 and internal_terminal_init. */
6892 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6894 && NILP (Vwindow_system
))
6896 /* For the initial frame, we don't have any way of knowing what
6897 are the foreground and background colors of the terminal. */
6898 struct frame
*sf
= SELECTED_FRAME();
6900 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6901 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6902 call0 (intern ("tty-set-up-initial-frame-faces"));
6908 /***********************************************************************
6910 ***********************************************************************/
6912 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6913 Sinternal_show_cursor
, 2, 2, 0,
6914 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6915 WINDOW nil means use the selected window. SHOW non-nil means
6916 show a cursor in WINDOW in the next redisplay. SHOW nil means
6917 don't show a cursor. */)
6919 Lisp_Object window
, show
;
6921 /* Don't change cursor state while redisplaying. This could confuse
6923 if (!redisplaying_p
)
6926 window
= selected_window
;
6928 CHECK_WINDOW (window
);
6930 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6937 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6938 Sinternal_show_cursor_p
, 0, 1, 0,
6939 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6940 WINDOW nil or omitted means report on the selected window. */)
6947 window
= selected_window
;
6949 CHECK_WINDOW (window
);
6951 w
= XWINDOW (window
);
6952 return w
->cursor_off_p
? Qnil
: Qt
;
6956 /***********************************************************************
6958 ***********************************************************************/
6963 defsubr (&Sredraw_frame
);
6964 defsubr (&Sredraw_display
);
6965 defsubr (&Sframe_or_buffer_changed_p
);
6966 defsubr (&Sopen_termscript
);
6968 defsubr (&Ssit_for
);
6969 defsubr (&Ssleep_for
);
6970 defsubr (&Ssend_string_to_terminal
);
6971 defsubr (&Sinternal_show_cursor
);
6972 defsubr (&Sinternal_show_cursor_p
);
6975 defsubr (&Sdump_redisplay_history
);
6978 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6979 staticpro (&frame_and_buffer_state
);
6981 Qdisplay_table
= intern ("display-table");
6982 staticpro (&Qdisplay_table
);
6983 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6984 staticpro (&Qredisplay_dont_pause
);
6986 DEFVAR_INT ("baud-rate", &baud_rate
,
6987 doc
: /* *The output baud rate of the terminal.
6988 On most systems, changing this value will affect the amount of padding
6989 and the other strategic decisions made during redisplay. */);
6991 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6992 doc
: /* *Non-nil means invert the entire frame display.
6993 This means everything is in inverse video which otherwise would not be. */);
6995 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6996 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6998 See also `ring-bell-function'. */);
7000 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7001 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7002 A non-nil value is useful if the terminal can automatically preserve
7003 Emacs's frame display when you reenter Emacs.
7004 It is up to you to set this variable if your terminal can do that. */);
7006 DEFVAR_LISP ("window-system", &Vwindow_system
,
7007 doc
: /* Name of window system that Emacs is displaying through.
7008 The value is a symbol--for instance, `x' for X windows.
7009 The value is nil if Emacs is using a text-only terminal. */);
7011 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7012 doc
: /* The version number of the window system in use.
7013 For X windows, this is 10 or 11. */);
7015 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7016 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7018 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7019 doc
: /* Table defining how to output a glyph code to the frame.
7020 If not nil, this is a vector indexed by glyph code to define the glyph.
7021 Each element can be:
7022 integer: a glyph code which this glyph is an alias for.
7023 string: output this glyph using that string (not impl. in X windows).
7024 nil: this glyph mod 524288 is the code of a character to output,
7025 and this glyph / 524288 is the face number (see `face-id') to use
7026 while outputting it. */);
7027 Vglyph_table
= Qnil
;
7029 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7030 doc
: /* Display table to use for buffers that specify none.
7031 See `buffer-display-table' for more information. */);
7032 Vstandard_display_table
= Qnil
;
7034 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7035 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7036 redisplay_dont_pause
= 0;
7038 #if PERIODIC_PREEMPTION_CHECKING
7039 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7040 doc
: /* *The period in seconds between checking for input during redisplay.
7041 If input is detected, redisplay is pre-empted, and the input is processed.
7042 If nil, never pre-empt redisplay. */);
7043 Vredisplay_preemption_period
= make_float (0.10);
7050 Vwindow_system
= Qnil
;
7051 Vwindow_system_version
= Qnil
;
7055 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7056 (do not change this comment) */