1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 98, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
65 #endif /* macintosh */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define min(a, b) ((a) < (b) ? (a) : (b))
81 /* Get number of chars of output now in the buffer of a stdio stream.
82 This ought to be built in in stdio, but it isn't. Some s- files
83 override this because their stdio internals differ. */
85 #ifdef __GNU_LIBRARY__
87 /* The s- file might have overridden the definition with one that
88 works for the system's C library. But we are using the GNU C
89 library, so this is the right definition for every system. */
91 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
94 #undef PENDING_OUTPUT_COUNT
95 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
97 #else /* not __GNU_LIBRARY__ */
98 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
99 #include <stdio_ext.h>
100 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
102 #ifndef PENDING_OUTPUT_COUNT
103 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
105 #endif /* not __GNU_LIBRARY__ */
107 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
108 #include <term.h> /* for tgetent */
111 /* Structure to pass dimensions around. Used for character bounding
112 boxes, glyph matrix dimensions and alike. */
121 /* Function prototypes. */
123 static void redraw_overlapping_rows
P_ ((struct window
*, int));
124 static void redraw_overlapped_rows
P_ ((struct window
*, int));
125 static int count_blanks
P_ ((struct glyph
*, int));
126 static int count_match
P_ ((struct glyph
*, struct glyph
*,
127 struct glyph
*, struct glyph
*));
128 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
129 static void update_frame_line
P_ ((struct frame
*, int));
130 static struct dim allocate_matrices_for_frame_redisplay
131 P_ ((Lisp_Object
, int, int, struct dim
, int, int *));
132 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));
190 /* Non-zero means don't pause redisplay for pending input. (This is
191 for debugging and for a future implementation of EDT-like
194 int redisplay_dont_pause
;
196 /* Nonzero upon entry to redisplay means do not assume anything about
197 current contents of actual terminal frame; clear and redraw it. */
201 /* Nonzero means last display completed. Zero means it was preempted. */
203 int display_completed
;
205 /* Lisp variable visible-bell; enables use of screen-flash instead of
210 /* Invert the color of the whole frame, at a low level. */
214 /* Line speed of the terminal. */
218 /* Either nil or a symbol naming the window system under which Emacs
221 Lisp_Object Vwindow_system
;
223 /* Version number of X windows: 10, 11 or nil. */
225 Lisp_Object Vwindow_system_version
;
227 /* Vector of glyph definitions. Indexed by glyph number, the contents
228 are a string which is how to output the glyph.
230 If Vglyph_table is nil, a glyph is output by using its low 8 bits
233 This is an obsolete feature that is no longer used. The variable
234 is retained for compatibility. */
236 Lisp_Object Vglyph_table
;
238 /* Display table to use for vectors that don't specify their own. */
240 Lisp_Object Vstandard_display_table
;
242 /* Nonzero means reading single-character input with prompt so put
243 cursor on mini-buffer after the prompt. positive means at end of
244 text in echo area; negative means at beginning of line. */
246 int cursor_in_echo_area
;
248 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
251 /* The currently selected frame. In a single-frame version, this
252 variable always equals the_only_frame. */
254 Lisp_Object selected_frame
;
256 /* A frame which is not just a mini-buffer, or 0 if there are no such
257 frames. This is usually the most recent such frame that was
258 selected. In a single-frame version, this variable always holds
259 the address of the_only_frame. */
261 struct frame
*last_nonminibuf_frame
;
263 /* Stdio stream being used for copy of all output. */
267 /* Structure for info on cursor positioning. */
271 /* 1 means SIGWINCH happened when not safe. */
273 int delayed_size_change
;
275 /* 1 means glyph initialization has been completed at startup. */
277 static int glyphs_initialized_initially_p
;
279 /* Updated window if != 0. Set by update_window. */
281 struct window
*updated_window
;
283 /* Glyph row updated in update_window_line, and area that is updated. */
285 struct glyph_row
*updated_row
;
288 /* A glyph for a space. */
290 struct glyph space_glyph
;
292 /* Non-zero means update has been performed directly, so that there's
293 no need for redisplay_internal to do much work. Set by
294 direct_output_for_insert. */
296 int redisplay_performed_directly_p
;
298 /* Counts of allocated structures. These counts serve to diagnose
299 memory leaks and double frees. */
301 int glyph_matrix_count
;
302 int glyph_pool_count
;
304 /* If non-null, the frame whose frame matrices are manipulated. If
305 null, window matrices are worked on. */
307 static struct frame
*frame_matrix_frame
;
309 /* Current interface for window-based redisplay. Set from init_xterm.
310 A null value means we are not using window-based redisplay. */
312 struct redisplay_interface
*rif
;
314 /* Non-zero means that fonts have been loaded since the last glyph
315 matrix adjustments. Redisplay must stop, and glyph matrices must
316 be adjusted when this flag becomes non-zero during display. The
317 reason fonts can be loaded so late is that fonts of fontsets are
322 /* Convert vpos and hpos from frame to window and vice versa.
323 This may only be used for terminal frames. */
327 static int window_to_frame_vpos
P_ ((struct window
*, int));
328 static int window_to_frame_hpos
P_ ((struct window
*, int));
329 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
330 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
332 #else /* GLYPH_DEBUG == 0 */
334 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + XFASTINT ((W)->top))
335 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + XFASTINT ((W)->left))
337 #endif /* GLYPH_DEBUG == 0 */
340 /* Like bcopy except never gets confused by overlap. Let this be the
341 first function defined in this file, or change emacs.c where the
342 address of this function is used. */
345 safe_bcopy (from
, to
, size
)
349 if (size
<= 0 || from
== to
)
352 /* If the source and destination don't overlap, then bcopy can
353 handle it. If they do overlap, but the destination is lower in
354 memory than the source, we'll assume bcopy can handle that. */
355 if (to
< from
|| from
+ size
<= to
)
356 bcopy (from
, to
, size
);
358 /* Otherwise, we'll copy from the end. */
361 register char *endf
= from
+ size
;
362 register char *endt
= to
+ size
;
364 /* If TO - FROM is large, then we should break the copy into
365 nonoverlapping chunks of TO - FROM bytes each. However, if
366 TO - FROM is small, then the bcopy function call overhead
367 makes this not worth it. The crossover point could be about
368 anywhere. Since I don't think the obvious copy loop is too
369 bad, I'm trying to err in its favor. */
374 while (endf
!= from
);
386 bcopy (endf
, endt
, to
- from
);
389 /* If SIZE wasn't a multiple of TO - FROM, there will be a
390 little left over. The amount left over is (endt + (to -
391 from)) - to, which is endt - from. */
392 bcopy (from
, to
, endt
- from
);
399 /***********************************************************************
401 ***********************************************************************/
403 /* Allocate and return a glyph_matrix structure. POOL is the glyph
404 pool from which memory for the matrix should be allocated, or null
405 for window-based redisplay where no glyph pools are used. The
406 member `pool' of the glyph matrix structure returned is set to
407 POOL, the structure is otherwise zeroed. */
409 struct glyph_matrix
*
410 new_glyph_matrix (pool
)
411 struct glyph_pool
*pool
;
413 struct glyph_matrix
*result
;
415 /* Allocate and clear. */
416 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
417 bzero (result
, sizeof *result
);
419 /* Increment number of allocated matrices. This count is used
420 to detect memory leaks. */
421 ++glyph_matrix_count
;
423 /* Set pool and return. */
429 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
431 The global counter glyph_matrix_count is decremented when a matrix
432 is freed. If the count gets negative, more structures were freed
433 than allocated, i.e. one matrix was freed more than once or a bogus
434 pointer was passed to this function.
436 If MATRIX->pool is null, this means that the matrix manages its own
437 glyph memory---this is done for matrices on X frames. Freeing the
438 matrix also frees the glyph memory in this case. */
441 free_glyph_matrix (matrix
)
442 struct glyph_matrix
*matrix
;
448 /* Detect the case that more matrices are freed than were
450 if (--glyph_matrix_count
< 0)
453 /* Free glyph memory if MATRIX owns it. */
454 if (matrix
->pool
== NULL
)
455 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
456 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
458 /* Free row structures and the matrix itself. */
459 xfree (matrix
->rows
);
465 /* Return the number of glyphs to reserve for a marginal area of
466 window W. TOTAL_GLYPHS is the number of glyphs in a complete
467 display line of window W. MARGIN gives the width of the marginal
468 area in canonical character units. MARGIN should be an integer
472 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
479 if (NUMBERP (margin
))
481 int width
= XFASTINT (w
->width
);
482 double d
= max (0, XFLOATINT (margin
));
483 d
= min (width
/ 2 - 1, d
);
484 n
= (int) ((double) total_glyphs
/ width
* d
);
493 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
496 W is null if the function is called for a frame glyph matrix.
497 Otherwise it is the window MATRIX is a member of. X and Y are the
498 indices of the first column and row of MATRIX within the frame
499 matrix, if such a matrix exists. They are zero for purely
500 window-based redisplay. DIM is the needed size of the matrix.
502 In window-based redisplay, where no frame matrices exist, glyph
503 matrices manage their own glyph storage. Otherwise, they allocate
504 storage from a common frame glyph pool which can be found in
507 The reason for this memory management strategy is to avoid complete
508 frame redraws if possible. When we allocate from a common pool, a
509 change of the location or size of a sub-matrix within the pool
510 requires a complete redisplay of the frame because we cannot easily
511 make sure that the current matrices of all windows still agree with
512 what is displayed on the screen. While this is usually fast, it
513 leads to screen flickering. */
516 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
518 struct glyph_matrix
*matrix
;
524 int marginal_areas_changed_p
= 0;
525 int header_line_changed_p
= 0;
526 int header_line_p
= 0;
527 int left
= -1, right
= -1;
528 int window_x
, window_y
, window_width
, window_height
;
530 /* See if W had a top line that has disappeared now, or vice versa. */
533 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
534 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
536 matrix
->header_line_p
= header_line_p
;
538 /* Do nothing if MATRIX' size, position, vscroll, and marginal areas
539 haven't changed. This optimization is important because preserving
540 the matrix means preventing redisplay. */
541 if (matrix
->pool
== NULL
)
543 window_box (w
, -1, &window_x
, &window_y
, &window_width
, &window_height
);
544 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_width
);
545 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_width
);
546 xassert (left
>= 0 && right
>= 0);
547 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
548 || right
!= matrix
->right_margin_glyphs
);
550 if (!marginal_areas_changed_p
552 && !header_line_changed_p
553 && matrix
->window_top_y
== XFASTINT (w
->top
)
554 && matrix
->window_height
== window_height
555 && matrix
->window_vscroll
== w
->vscroll
556 && matrix
->window_width
== window_width
)
560 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
561 if (matrix
->rows_allocated
< dim
.height
)
563 int size
= dim
.height
* sizeof (struct glyph_row
);
564 new_rows
= dim
.height
- matrix
->rows_allocated
;
565 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
566 bzero (matrix
->rows
+ matrix
->rows_allocated
,
567 new_rows
* sizeof *matrix
->rows
);
568 matrix
->rows_allocated
= dim
.height
;
573 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
574 on a frame not using window-based redisplay. Set up pointers for
575 each row into the glyph pool. */
578 xassert (matrix
->pool
->glyphs
);
582 left
= margin_glyphs_to_reserve (w
, dim
.width
,
583 w
->left_margin_width
);
584 right
= margin_glyphs_to_reserve (w
, dim
.width
,
585 w
->right_margin_width
);
590 for (i
= 0; i
< dim
.height
; ++i
)
592 struct glyph_row
*row
= &matrix
->rows
[i
];
594 row
->glyphs
[LEFT_MARGIN_AREA
]
595 = (matrix
->pool
->glyphs
596 + (y
+ i
) * matrix
->pool
->ncolumns
600 || row
== matrix
->rows
+ dim
.height
- 1
601 || (row
== matrix
->rows
&& matrix
->header_line_p
))
603 row
->glyphs
[TEXT_AREA
]
604 = row
->glyphs
[LEFT_MARGIN_AREA
];
605 row
->glyphs
[RIGHT_MARGIN_AREA
]
606 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
607 row
->glyphs
[LAST_AREA
]
608 = row
->glyphs
[RIGHT_MARGIN_AREA
];
612 row
->glyphs
[TEXT_AREA
]
613 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
614 row
->glyphs
[RIGHT_MARGIN_AREA
]
615 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
616 row
->glyphs
[LAST_AREA
]
617 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
621 matrix
->left_margin_glyphs
= left
;
622 matrix
->right_margin_glyphs
= right
;
626 /* If MATRIX->pool is null, MATRIX is responsible for managing
627 its own memory. Allocate glyph memory from the heap. */
628 if (dim
.width
> matrix
->matrix_w
630 || header_line_changed_p
631 || marginal_areas_changed_p
)
633 struct glyph_row
*row
= matrix
->rows
;
634 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
638 row
->glyphs
[LEFT_MARGIN_AREA
]
639 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
641 * sizeof (struct glyph
)));
643 /* The mode line never has marginal areas. */
644 if (row
== matrix
->rows
+ dim
.height
- 1
645 || (row
== matrix
->rows
&& matrix
->header_line_p
))
647 row
->glyphs
[TEXT_AREA
]
648 = row
->glyphs
[LEFT_MARGIN_AREA
];
649 row
->glyphs
[RIGHT_MARGIN_AREA
]
650 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
651 row
->glyphs
[LAST_AREA
]
652 = row
->glyphs
[RIGHT_MARGIN_AREA
];
656 row
->glyphs
[TEXT_AREA
]
657 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
658 row
->glyphs
[RIGHT_MARGIN_AREA
]
659 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
660 row
->glyphs
[LAST_AREA
]
661 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
667 xassert (left
>= 0 && right
>= 0);
668 matrix
->left_margin_glyphs
= left
;
669 matrix
->right_margin_glyphs
= right
;
672 /* Number of rows to be used by MATRIX. */
673 matrix
->nrows
= dim
.height
;
674 xassert (matrix
->nrows
>= 0);
676 /* Mark rows in a current matrix of a window as not having valid
677 contents. It's important to not do this for desired matrices.
678 When Emacs starts, it may already be building desired matrices
679 when this function runs. */
680 if (w
&& matrix
== w
->current_matrix
)
682 /* Optimize the case that only the height has changed (C-x 2,
683 upper window). Invalidate all rows that are no longer part
685 if (!marginal_areas_changed_p
686 && matrix
->window_top_y
== XFASTINT (w
->top
)
687 && matrix
->window_width
== window_width
)
690 while (matrix
->rows
[i
].enabled_p
691 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
692 < matrix
->window_height
))
695 /* Window end is invalid, if inside of the rows that
697 if (INTEGERP (w
->window_end_vpos
)
698 && XFASTINT (w
->window_end_vpos
) >= i
)
699 w
->window_end_valid
= Qnil
;
701 while (i
< matrix
->nrows
)
702 matrix
->rows
[i
++].enabled_p
= 0;
706 for (i
= 0; i
< matrix
->nrows
; ++i
)
707 matrix
->rows
[i
].enabled_p
= 0;
711 /* Remember last values to be able to optimize frame redraws. */
712 matrix
->matrix_x
= x
;
713 matrix
->matrix_y
= y
;
714 matrix
->matrix_w
= dim
.width
;
715 matrix
->matrix_h
= dim
.height
;
717 /* Record the top y location and height of W at the time the matrix
718 was last adjusted. This is used to optimize redisplay above. */
721 matrix
->window_top_y
= XFASTINT (w
->top
);
722 matrix
->window_height
= window_height
;
723 matrix
->window_width
= window_width
;
724 matrix
->window_vscroll
= w
->vscroll
;
729 /* Reverse the contents of rows in MATRIX between START and END. The
730 contents of the row at END - 1 end up at START, END - 2 at START +
731 1 etc. This is part of the implementation of rotate_matrix (see
735 reverse_rows (matrix
, start
, end
)
736 struct glyph_matrix
*matrix
;
741 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
743 /* Non-ISO HP/UX compiler doesn't like auto struct
745 struct glyph_row temp
;
746 temp
= matrix
->rows
[i
];
747 matrix
->rows
[i
] = matrix
->rows
[j
];
748 matrix
->rows
[j
] = temp
;
753 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
754 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
755 indices. (Note: this does not copy glyphs, only glyph pointers in
756 row structures are moved around).
758 The algorithm used for rotating the vector was, I believe, first
759 described by Kernighan. See the vector R as consisting of two
760 sub-vectors AB, where A has length BY for BY >= 0. The result
761 after rotating is then BA. Reverse both sub-vectors to get ArBr
762 and reverse the result to get (ArBr)r which is BA. Similar for
766 rotate_matrix (matrix
, first
, last
, by
)
767 struct glyph_matrix
*matrix
;
772 /* Up (rotate left, i.e. towards lower indices). */
774 reverse_rows (matrix
, first
, first
+ by
);
775 reverse_rows (matrix
, first
+ by
, last
);
776 reverse_rows (matrix
, first
, last
);
780 /* Down (rotate right, i.e. towards higher indices). */
781 reverse_rows (matrix
, last
- by
, last
);
782 reverse_rows (matrix
, first
, last
- by
);
783 reverse_rows (matrix
, first
, last
);
788 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
789 with indices START <= index < END. Increment positions by DELTA/
793 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
794 struct glyph_matrix
*matrix
;
795 int start
, end
, delta
, delta_bytes
;
797 /* Check that START and END are reasonable values. */
798 xassert (start
>= 0 && start
<= matrix
->nrows
);
799 xassert (end
>= 0 && end
<= matrix
->nrows
);
800 xassert (start
<= end
);
802 for (; start
< end
; ++start
)
803 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
807 /* Enable a range of rows in glyph matrix MATRIX. START and END are
808 the row indices of the first and last + 1 row to enable. If
809 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
812 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
813 struct glyph_matrix
*matrix
;
817 xassert (start
<= end
);
818 xassert (start
>= 0 && start
< matrix
->nrows
);
819 xassert (end
>= 0 && end
<= matrix
->nrows
);
821 for (; start
< end
; ++start
)
822 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
828 This empties all rows in MATRIX by setting the enabled_p flag for
829 all rows of the matrix to zero. The function prepare_desired_row
830 will eventually really clear a row when it sees one with a zero
833 Resets update hints to defaults value. The only update hint
834 currently present is the flag MATRIX->no_scrolling_p. */
837 clear_glyph_matrix (matrix
)
838 struct glyph_matrix
*matrix
;
842 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
843 matrix
->no_scrolling_p
= 0;
848 /* Shift part of the glyph matrix MATRIX of window W up or down.
849 Increment y-positions in glyph rows between START and END by DY,
850 and recompute their visible height. */
853 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
855 struct glyph_matrix
*matrix
;
860 xassert (start
<= end
);
861 xassert (start
>= 0 && start
< matrix
->nrows
);
862 xassert (end
>= 0 && end
<= matrix
->nrows
);
864 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
865 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
867 for (; start
< end
; ++start
)
869 struct glyph_row
*row
= &matrix
->rows
[start
];
874 row
->visible_height
= row
->height
- (min_y
- row
->y
);
875 else if (row
->y
+ row
->height
> max_y
)
876 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
878 row
->visible_height
= row
->height
;
883 /* Mark all rows in current matrices of frame F as invalid. Marking
884 invalid is done by setting enabled_p to zero for all rows in a
888 clear_current_matrices (f
)
889 register struct frame
*f
;
891 /* Clear frame current matrix, if we have one. */
892 if (f
->current_matrix
)
893 clear_glyph_matrix (f
->current_matrix
);
895 /* Clear the matrix of the menu bar window, if such a window exists.
896 The menu bar window is currently used to display menus on X when
897 no toolkit support is compiled in. */
898 if (WINDOWP (f
->menu_bar_window
))
899 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
901 /* Clear the matrix of the tool-bar window, if any. */
902 if (WINDOWP (f
->tool_bar_window
))
903 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
905 /* Clear current window matrices. */
906 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
907 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
911 /* Clear out all display lines of F for a coming redisplay. */
914 clear_desired_matrices (f
)
915 register struct frame
*f
;
917 if (f
->desired_matrix
)
918 clear_glyph_matrix (f
->desired_matrix
);
920 if (WINDOWP (f
->menu_bar_window
))
921 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
923 if (WINDOWP (f
->tool_bar_window
))
924 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
926 /* Do it for window matrices. */
927 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
928 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
932 /* Clear matrices in window tree rooted in W. If DESIRED_P is
933 non-zero clear desired matrices, otherwise clear current matrices. */
936 clear_window_matrices (w
, desired_p
)
942 if (!NILP (w
->hchild
))
944 xassert (WINDOWP (w
->hchild
));
945 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
947 else if (!NILP (w
->vchild
))
949 xassert (WINDOWP (w
->vchild
));
950 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
955 clear_glyph_matrix (w
->desired_matrix
);
958 clear_glyph_matrix (w
->current_matrix
);
959 w
->window_end_valid
= Qnil
;
963 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
969 /***********************************************************************
972 See dispextern.h for an overall explanation of glyph rows.
973 ***********************************************************************/
975 /* Clear glyph row ROW. Do it in a way that makes it robust against
976 changes in the glyph_row structure, i.e. addition or removal of
977 structure members. */
979 static struct glyph_row null_row
;
982 clear_glyph_row (row
)
983 struct glyph_row
*row
;
985 struct glyph
*p
[1 + LAST_AREA
];
988 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
989 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
990 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
991 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
996 /* Restore pointers. */
997 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
998 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
999 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1000 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1002 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1003 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1004 Redisplay outputs such glyphs, and flickering effects were
1005 the result. This also depended on the contents of memory
1006 returned by xmalloc. If flickering happens again, activate
1007 the code below If the flickering is gone with that, chances
1008 are that the flickering has the same reason as here. */
1009 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1014 /* Make ROW an empty, enabled row of canonical character height,
1015 in window W starting at y-position Y. */
1018 blank_row (w
, row
, y
)
1020 struct glyph_row
*row
;
1025 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1026 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1028 clear_glyph_row (row
);
1030 row
->ascent
= row
->phys_ascent
= 0;
1031 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1034 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1035 else if (row
->y
+ row
->height
> max_y
)
1036 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1038 row
->visible_height
= row
->height
;
1044 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1045 are the amounts by which to change positions. Note that the first
1046 glyph of the text area of a row can have a buffer position even if
1047 the used count of the text area is zero. Such rows display line
1051 increment_row_positions (row
, delta
, delta_bytes
)
1052 struct glyph_row
*row
;
1053 int delta
, delta_bytes
;
1057 /* Increment start and end positions. */
1058 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1059 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1060 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1061 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1063 /* Increment positions in glyphs. */
1064 for (area
= 0; area
< LAST_AREA
; ++area
)
1065 for (i
= 0; i
< row
->used
[area
]; ++i
)
1066 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1067 && row
->glyphs
[area
][i
].charpos
> 0)
1068 row
->glyphs
[area
][i
].charpos
+= delta
;
1070 /* Capture the case of rows displaying a line end. */
1071 if (row
->used
[TEXT_AREA
] == 0
1072 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1073 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1078 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1079 contents, i.e. glyph structure contents are exchanged between A and
1080 B without changing glyph pointers in A and B. */
1083 swap_glyphs_in_rows (a
, b
)
1084 struct glyph_row
*a
, *b
;
1088 for (area
= 0; area
< LAST_AREA
; ++area
)
1090 /* Number of glyphs to swap. */
1091 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1093 /* Start of glyphs in area of row A. */
1094 struct glyph
*glyph_a
= a
->glyphs
[area
];
1096 /* End + 1 of glyphs in area of row A. */
1097 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1099 /* Start of glyphs in area of row B. */
1100 struct glyph
*glyph_b
= b
->glyphs
[area
];
1102 while (glyph_a
< glyph_a_end
)
1104 /* Non-ISO HP/UX compiler doesn't like auto struct
1108 *glyph_a
= *glyph_b
;
1118 /* Exchange pointers to glyph memory between glyph rows A and B. */
1121 swap_glyph_pointers (a
, b
)
1122 struct glyph_row
*a
, *b
;
1125 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1127 struct glyph
*temp
= a
->glyphs
[i
];
1128 a
->glyphs
[i
] = b
->glyphs
[i
];
1129 b
->glyphs
[i
] = temp
;
1134 /* Copy glyph row structure FROM to glyph row structure TO, except
1135 that glyph pointers in the structures are left unchanged. */
1138 copy_row_except_pointers (to
, from
)
1139 struct glyph_row
*to
, *from
;
1141 struct glyph
*pointers
[1 + LAST_AREA
];
1143 /* Save glyph pointers of TO. */
1144 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1146 /* Do a structure assignment. */
1149 /* Restore original pointers of TO. */
1150 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1154 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1155 TO and FROM are left unchanged. Glyph contents are copied from the
1156 glyph memory of FROM to the glyph memory of TO. Increment buffer
1157 positions in row TO by DELTA/ DELTA_BYTES. */
1160 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1161 struct glyph_row
*to
, *from
;
1162 int delta
, delta_bytes
;
1166 /* This is like a structure assignment TO = FROM, except that
1167 glyph pointers in the rows are left unchanged. */
1168 copy_row_except_pointers (to
, from
);
1170 /* Copy glyphs from FROM to TO. */
1171 for (area
= 0; area
< LAST_AREA
; ++area
)
1172 if (from
->used
[area
])
1173 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1174 from
->used
[area
] * sizeof (struct glyph
));
1176 /* Increment buffer positions in TO by DELTA. */
1177 increment_row_positions (to
, delta
, delta_bytes
);
1181 /* Assign glyph row FROM to glyph row TO. This works like a structure
1182 assignment TO = FROM, except that glyph pointers are not copied but
1183 exchanged between TO and FROM. Pointers must be exchanged to avoid
1187 assign_row (to
, from
)
1188 struct glyph_row
*to
, *from
;
1190 swap_glyph_pointers (to
, from
);
1191 copy_row_except_pointers (to
, from
);
1195 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1196 a row in a window matrix, is a slice of the glyph memory of the
1197 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1198 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1199 memory of FRAME_ROW. */
1204 glyph_row_slice_p (window_row
, frame_row
)
1205 struct glyph_row
*window_row
, *frame_row
;
1207 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1208 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1209 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1211 return (frame_glyph_start
<= window_glyph_start
1212 && window_glyph_start
< frame_glyph_end
);
1215 #endif /* GLYPH_DEBUG */
1219 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1220 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1221 in WINDOW_MATRIX is found satisfying the condition. */
1223 static struct glyph_row
*
1224 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1225 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1230 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1232 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1233 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1234 frame_matrix
->rows
+ row
))
1237 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1242 /* Prepare ROW for display. Desired rows are cleared lazily,
1243 i.e. they are only marked as to be cleared by setting their
1244 enabled_p flag to zero. When a row is to be displayed, a prior
1245 call to this function really clears it. */
1248 prepare_desired_row (row
)
1249 struct glyph_row
*row
;
1251 if (!row
->enabled_p
)
1253 clear_glyph_row (row
);
1259 /* Return a hash code for glyph row ROW. */
1262 line_hash_code (row
)
1263 struct glyph_row
*row
;
1271 /* Give all highlighted lines the same hash code
1272 so as to encourage scrolling to leave them in place. */
1277 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1278 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1282 int c
= glyph
->u
.ch
;
1283 int face_id
= glyph
->face_id
;
1284 if (must_write_spaces
)
1286 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1287 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1300 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1301 the number of characters in the line. If must_write_spaces is
1302 zero, leading and trailing spaces are ignored. */
1305 line_draw_cost (matrix
, vpos
)
1306 struct glyph_matrix
*matrix
;
1309 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1310 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1311 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1313 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1314 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1316 /* Ignore trailing and leading spaces if we can. */
1317 if (!must_write_spaces
)
1319 /* Skip from the end over trailing spaces. */
1320 while (end
!= beg
&& CHAR_GLYPH_SPACE_P (*end
))
1323 /* All blank line. */
1327 /* Skip over leading spaces. */
1328 while (CHAR_GLYPH_SPACE_P (*beg
))
1332 /* If we don't have a glyph-table, each glyph is one character,
1333 so return the number of glyphs. */
1334 if (glyph_table_base
== 0)
1338 /* Otherwise, scan the glyphs and accumulate their total length
1343 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1346 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1349 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1359 /* Test two glyph rows A and B for equality. Value is non-zero if A
1360 and B have equal contents. W is the window to which the glyphs
1361 rows A and B belong. It is needed here to test for partial row
1362 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1363 flags of A and B, too. */
1366 row_equal_p (w
, a
, b
, mouse_face_p
)
1368 struct glyph_row
*a
, *b
;
1373 else if (a
->hash
!= b
->hash
)
1377 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1380 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1383 /* Compare glyphs. */
1384 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1386 if (a
->used
[area
] != b
->used
[area
])
1389 a_glyph
= a
->glyphs
[area
];
1390 a_end
= a_glyph
+ a
->used
[area
];
1391 b_glyph
= b
->glyphs
[area
];
1393 while (a_glyph
< a_end
1394 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1395 ++a_glyph
, ++b_glyph
;
1397 if (a_glyph
!= a_end
)
1401 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1402 || a
->inverse_p
!= b
->inverse_p
1403 || a
->fill_line_p
!= b
->fill_line_p
1404 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1405 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1406 || a
->continued_p
!= b
->continued_p
1407 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1408 || a
->overlapped_p
!= b
->overlapped_p
1409 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1410 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1411 /* Different partially visible characters on left margin. */
1413 /* Different height. */
1414 || a
->ascent
!= b
->ascent
1415 || a
->phys_ascent
!= b
->phys_ascent
1416 || a
->phys_height
!= b
->phys_height
1417 || a
->visible_height
!= b
->visible_height
)
1426 /***********************************************************************
1429 See dispextern.h for an overall explanation of glyph pools.
1430 ***********************************************************************/
1432 /* Allocate a glyph_pool structure. The structure returned is
1433 initialized with zeros. The global variable glyph_pool_count is
1434 incremented for each pool allocated. */
1436 static struct glyph_pool
*
1439 struct glyph_pool
*result
;
1441 /* Allocate a new glyph_pool and clear it. */
1442 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1443 bzero (result
, sizeof *result
);
1445 /* For memory leak and double deletion checking. */
1452 /* Free a glyph_pool structure POOL. The function may be called with
1453 a null POOL pointer. The global variable glyph_pool_count is
1454 decremented with every pool structure freed. If this count gets
1455 negative, more structures were freed than allocated, i.e. one
1456 structure must have been freed more than once or a bogus pointer
1457 was passed to free_glyph_pool. */
1460 free_glyph_pool (pool
)
1461 struct glyph_pool
*pool
;
1465 /* More freed than allocated? */
1467 xassert (glyph_pool_count
>= 0);
1469 xfree (pool
->glyphs
);
1475 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1476 columns we need. This function never shrinks a pool. The only
1477 case in which this would make sense, would be when a frame's size
1478 is changed from a large value to a smaller one. But, if someone
1479 does it once, we can expect that he will do it again.
1481 Value is non-zero if the pool changed in a way which makes
1482 re-adjusting window glyph matrices necessary. */
1485 realloc_glyph_pool (pool
, matrix_dim
)
1486 struct glyph_pool
*pool
;
1487 struct dim matrix_dim
;
1492 changed_p
= (pool
->glyphs
== 0
1493 || matrix_dim
.height
!= pool
->nrows
1494 || matrix_dim
.width
!= pool
->ncolumns
);
1496 /* Enlarge the glyph pool. */
1497 needed
= matrix_dim
.width
* matrix_dim
.height
;
1498 if (needed
> pool
->nglyphs
)
1500 int size
= needed
* sizeof (struct glyph
);
1503 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1506 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1507 bzero (pool
->glyphs
, size
);
1510 pool
->nglyphs
= needed
;
1513 /* Remember the number of rows and columns because (a) we use then
1514 to do sanity checks, and (b) the number of columns determines
1515 where rows in the frame matrix start---this must be available to
1516 determine pointers to rows of window sub-matrices. */
1517 pool
->nrows
= matrix_dim
.height
;
1518 pool
->ncolumns
= matrix_dim
.width
;
1525 /***********************************************************************
1527 ***********************************************************************/
1532 /* Flush standard output. This is sometimes useful to call from
1542 /* Check that no glyph pointers have been lost in MATRIX. If a
1543 pointer has been lost, e.g. by using a structure assignment between
1544 rows, at least one pointer must occur more than once in the rows of
1548 check_matrix_pointer_lossage (matrix
)
1549 struct glyph_matrix
*matrix
;
1553 for (i
= 0; i
< matrix
->nrows
; ++i
)
1554 for (j
= 0; j
< matrix
->nrows
; ++j
)
1556 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1557 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1561 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1564 matrix_row (matrix
, row
)
1565 struct glyph_matrix
*matrix
;
1568 xassert (matrix
&& matrix
->rows
);
1569 xassert (row
>= 0 && row
< matrix
->nrows
);
1571 /* That's really too slow for normal testing because this function
1572 is called almost everywhere. Although---it's still astonishingly
1573 fast, so it is valuable to have for debugging purposes. */
1575 check_matrix_pointer_lossage (matrix
);
1578 return matrix
->rows
+ row
;
1582 #if 0 /* This function makes invalid assumptions when text is
1583 partially invisible. But it might come handy for debugging
1586 /* Check invariants that must hold for an up to date current matrix of
1590 check_matrix_invariants (w
)
1593 struct glyph_matrix
*matrix
= w
->current_matrix
;
1594 int yb
= window_text_bottom_y (w
);
1595 struct glyph_row
*row
= matrix
->rows
;
1596 struct glyph_row
*last_text_row
= NULL
;
1597 struct buffer
*saved
= current_buffer
;
1598 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1601 /* This can sometimes happen for a fresh window. */
1602 if (matrix
->nrows
< 2)
1605 set_buffer_temp (buffer
);
1607 /* Note: last row is always reserved for the mode line. */
1608 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1609 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1611 struct glyph_row
*next
= row
+ 1;
1613 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1614 last_text_row
= row
;
1616 /* Check that character and byte positions are in sync. */
1617 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1618 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1620 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1621 have such a position temporarily in case of a minibuffer
1622 displaying something like `[Sole completion]' at its end. */
1623 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1624 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1625 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1627 /* Check that end position of `row' is equal to start position
1629 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1631 xassert (MATRIX_ROW_END_CHARPOS (row
)
1632 == MATRIX_ROW_START_CHARPOS (next
));
1633 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1634 == MATRIX_ROW_START_BYTEPOS (next
));
1639 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1640 xassert (w
->desired_matrix
->rows
!= NULL
);
1641 set_buffer_temp (saved
);
1646 #endif /* GLYPH_DEBUG != 0 */
1650 /**********************************************************************
1651 Allocating/ Adjusting Glyph Matrices
1652 **********************************************************************/
1654 /* Allocate glyph matrices over a window tree for a frame-based
1657 X and Y are column/row within the frame glyph matrix where
1658 sub-matrices for the window tree rooted at WINDOW must be
1659 allocated. CH_DIM contains the dimensions of the smallest
1660 character that could be used during display. DIM_ONLY_P non-zero
1661 means that the caller of this function is only interested in the
1662 result matrix dimension, and matrix adjustments should not be
1665 The function returns the total width/height of the sub-matrices of
1666 the window tree. If called on a frame root window, the computation
1667 will take the mini-buffer window into account.
1669 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1671 NEW_LEAF_MATRIX set if any window in the tree did not have a
1672 glyph matrices yet, and
1674 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1675 any window in the tree will be changed or have been changed (see
1678 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1681 Windows are arranged into chains of windows on the same level
1682 through the next fields of window structures. Such a level can be
1683 either a sequence of horizontally adjacent windows from left to
1684 right, or a sequence of vertically adjacent windows from top to
1685 bottom. Each window in a horizontal sequence can be either a leaf
1686 window or a vertical sequence; a window in a vertical sequence can
1687 be either a leaf or a horizontal sequence. All windows in a
1688 horizontal sequence have the same height, and all windows in a
1689 vertical sequence have the same width.
1691 This function uses, for historical reasons, a more general
1692 algorithm to determine glyph matrix dimensions that would be
1695 The matrix height of a horizontal sequence is determined by the
1696 maximum height of any matrix in the sequence. The matrix width of
1697 a horizontal sequence is computed by adding up matrix widths of
1698 windows in the sequence.
1700 |<------- result width ------->|
1701 +---------+----------+---------+ ---
1704 +---------+ | | result height
1709 The matrix width of a vertical sequence is the maximum matrix width
1710 of any window in the sequence. Its height is computed by adding up
1711 matrix heights of windows in the sequence.
1713 |<---- result width -->|
1721 +------------+---------+ |
1724 +------------+---------+ --- */
1726 /* Bit indicating that a new matrix will be allocated or has been
1729 #define NEW_LEAF_MATRIX (1 << 0)
1731 /* Bit indicating that a matrix will or has changed its location or
1734 #define CHANGED_LEAF_MATRIX (1 << 1)
1737 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1738 dim_only_p
, window_change_flags
)
1743 int *window_change_flags
;
1745 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1747 int wmax
= 0, hmax
= 0;
1751 int in_horz_combination_p
;
1753 /* What combination is WINDOW part of? Compute this once since the
1754 result is the same for all windows in the `next' chain. The
1755 special case of a root window (parent equal to nil) is treated
1756 like a vertical combination because a root window's `next'
1757 points to the mini-buffer window, if any, which is arranged
1758 vertically below other windows. */
1759 in_horz_combination_p
1760 = (!NILP (XWINDOW (window
)->parent
)
1761 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1763 /* For WINDOW and all windows on the same level. */
1766 w
= XWINDOW (window
);
1768 /* Get the dimension of the window sub-matrix for W, depending
1769 on whether this a combination or a leaf window. */
1770 if (!NILP (w
->hchild
))
1771 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1773 window_change_flags
);
1774 else if (!NILP (w
->vchild
))
1775 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1777 window_change_flags
);
1780 /* If not already done, allocate sub-matrix structures. */
1781 if (w
->desired_matrix
== NULL
)
1783 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1784 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1785 *window_change_flags
|= NEW_LEAF_MATRIX
;
1788 /* Width and height MUST be chosen so that there are no
1789 holes in the frame matrix. */
1790 dim
.width
= XINT (w
->width
);
1791 dim
.height
= XINT (w
->height
);
1793 /* Will matrix be re-allocated? */
1794 if (x
!= w
->desired_matrix
->matrix_x
1795 || y
!= w
->desired_matrix
->matrix_y
1796 || dim
.width
!= w
->desired_matrix
->matrix_w
1797 || dim
.height
!= w
->desired_matrix
->matrix_h
1798 || (margin_glyphs_to_reserve (w
, dim
.width
,
1799 w
->right_margin_width
)
1800 != w
->desired_matrix
->left_margin_glyphs
)
1801 || (margin_glyphs_to_reserve (w
, dim
.width
,
1802 w
->left_margin_width
)
1803 != w
->desired_matrix
->right_margin_glyphs
))
1804 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1806 /* Actually change matrices, if allowed. Do not consider
1807 CHANGED_LEAF_MATRIX computed above here because the pool
1808 may have been changed which we don't now here. We trust
1809 that we only will be called with DIM_ONLY_P != 0 when
1813 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1814 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1818 /* If we are part of a horizontal combination, advance x for
1819 windows to the right of W; otherwise advance y for windows
1821 if (in_horz_combination_p
)
1826 /* Remember maximum glyph matrix dimensions. */
1827 wmax
= max (wmax
, dim
.width
);
1828 hmax
= max (hmax
, dim
.height
);
1830 /* Next window on same level. */
1833 while (!NILP (window
));
1835 /* Set `total' to the total glyph matrix dimension of this window
1836 level. In a vertical combination, the width is the width of the
1837 widest window; the height is the y we finally reached, corrected
1838 by the y we started with. In a horizontal combination, the total
1839 height is the height of the tallest window, and the width is the
1840 x we finally reached, corrected by the x we started with. */
1841 if (in_horz_combination_p
)
1843 total
.width
= x
- x0
;
1844 total
.height
= hmax
;
1849 total
.height
= y
- y0
;
1856 /* Allocate window matrices for window-based redisplay. W is the
1857 window whose matrices must be allocated/reallocated. CH_DIM is the
1858 size of the smallest character that could potentially be used on W. */
1861 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1865 struct frame
*f
= XFRAME (w
->frame
);
1869 if (!NILP (w
->vchild
))
1870 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1871 else if (!NILP (w
->hchild
))
1872 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1875 /* W is a leaf window. */
1876 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
1877 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1880 /* If matrices are not yet allocated, allocate them now. */
1881 if (w
->desired_matrix
== NULL
)
1883 w
->desired_matrix
= new_glyph_matrix (NULL
);
1884 w
->current_matrix
= new_glyph_matrix (NULL
);
1887 /* Compute number of glyphs needed in a glyph row. */
1888 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
1890 /* 2 partially visible columns in the text area. */
1892 /* One partially visible column at the right
1893 edge of each marginal area. */
1896 /* Compute number of glyph rows needed. */
1897 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
1899 /* One partially visible line at the top and
1900 bottom of the window. */
1902 /* 2 for top and mode line. */
1905 /* Change matrices. */
1906 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1907 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1910 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1915 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1916 do it for all frames; otherwise do it just for the given frame.
1917 This function must be called when a new frame is created, its size
1918 changes, or its window configuration changes. */
1924 /* Block input so that expose events and other events that access
1925 glyph matrices are not processed while we are changing them. */
1929 adjust_frame_glyphs (f
);
1932 Lisp_Object tail
, lisp_frame
;
1934 FOR_EACH_FRAME (tail
, lisp_frame
)
1935 adjust_frame_glyphs (XFRAME (lisp_frame
));
1942 /* Adjust frame glyphs when Emacs is initialized.
1944 To be called from init_display.
1946 We need a glyph matrix because redraw will happen soon.
1947 Unfortunately, window sizes on selected_frame are not yet set to
1948 meaningful values. I believe we can assume that there are only two
1949 windows on the frame---the mini-buffer and the root window. Frame
1950 height and width seem to be correct so far. So, set the sizes of
1951 windows to estimated values. */
1954 adjust_frame_glyphs_initially ()
1956 struct frame
*sf
= SELECTED_FRAME ();
1957 struct window
*root
= XWINDOW (sf
->root_window
);
1958 struct window
*mini
= XWINDOW (root
->next
);
1959 int frame_height
= FRAME_HEIGHT (sf
);
1960 int frame_width
= FRAME_WIDTH (sf
);
1961 int top_margin
= FRAME_TOP_MARGIN (sf
);
1963 /* Do it for the root window. */
1964 XSETFASTINT (root
->top
, top_margin
);
1965 XSETFASTINT (root
->width
, frame_width
);
1966 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
1968 /* Do it for the mini-buffer window. */
1969 XSETFASTINT (mini
->top
, frame_height
- 1);
1970 XSETFASTINT (mini
->width
, frame_width
);
1971 set_window_height (root
->next
, 1, 0);
1973 adjust_frame_glyphs (sf
);
1974 glyphs_initialized_initially_p
= 1;
1978 /* Allocate/reallocate glyph matrices of a single frame F. */
1981 adjust_frame_glyphs (f
)
1984 if (FRAME_WINDOW_P (f
))
1985 adjust_frame_glyphs_for_window_redisplay (f
);
1987 adjust_frame_glyphs_for_frame_redisplay (f
);
1989 /* Don't forget the message buffer and the buffer for
1990 decode_mode_spec. */
1991 adjust_frame_message_buffer (f
);
1992 adjust_decode_mode_spec_buffer (f
);
1994 f
->glyphs_initialized_p
= 1;
1998 /* Allocate/reallocate glyph matrices of a single frame F for
1999 frame-based redisplay. */
2002 adjust_frame_glyphs_for_frame_redisplay (f
)
2006 struct dim matrix_dim
;
2008 int window_change_flags
;
2011 if (!FRAME_LIVE_P (f
))
2014 /* Determine the smallest character in any font for F. On
2015 console windows, all characters have dimension (1, 1). */
2016 ch_dim
.width
= ch_dim
.height
= 1;
2018 top_window_y
= FRAME_TOP_MARGIN (f
);
2020 /* Allocate glyph pool structures if not already done. */
2021 if (f
->desired_pool
== NULL
)
2023 f
->desired_pool
= new_glyph_pool ();
2024 f
->current_pool
= new_glyph_pool ();
2027 /* Allocate frames matrix structures if needed. */
2028 if (f
->desired_matrix
== NULL
)
2030 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2031 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2034 /* Compute window glyph matrices. (This takes the mini-buffer
2035 window into account). The result is the size of the frame glyph
2036 matrix needed. The variable window_change_flags is set to a bit
2037 mask indicating whether new matrices will be allocated or
2038 existing matrices change their size or location within the frame
2040 window_change_flags
= 0;
2042 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2045 &window_change_flags
);
2047 /* Add in menu bar lines, if any. */
2048 matrix_dim
.height
+= top_window_y
;
2050 /* Enlarge pools as necessary. */
2051 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2052 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2054 /* Set up glyph pointers within window matrices. Do this only if
2055 absolutely necessary since it requires a frame redraw. */
2056 if (pool_changed_p
|| window_change_flags
)
2058 /* Do it for window matrices. */
2059 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2060 0, top_window_y
, ch_dim
, 0,
2061 &window_change_flags
);
2063 /* Size of frame matrices must equal size of frame. Note
2064 that we are called for X frames with window widths NOT equal
2065 to the frame width (from CHANGE_FRAME_SIZE_1). */
2066 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2067 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2069 /* Resize frame matrices. */
2070 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2071 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2073 /* Since location and size of sub-matrices within the pool may
2074 have changed, and current matrices don't have meaningful
2075 contents anymore, mark the frame garbaged. */
2076 SET_FRAME_GARBAGED (f
);
2081 /* Allocate/reallocate glyph matrices of a single frame F for
2082 window-based redisplay. */
2085 adjust_frame_glyphs_for_window_redisplay (f
)
2091 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2093 /* Get minimum sizes. */
2094 #ifdef HAVE_WINDOW_SYSTEM
2095 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2096 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2098 ch_dim
.width
= ch_dim
.height
= 1;
2101 /* Allocate/reallocate window matrices. */
2102 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2105 /* Allocate/ reallocate matrices of the dummy window used to display
2106 the menu bar under X when no X toolkit support is available. */
2107 #ifndef USE_X_TOOLKIT
2109 /* Allocate a dummy window if not already done. */
2110 if (NILP (f
->menu_bar_window
))
2112 f
->menu_bar_window
= make_window ();
2113 w
= XWINDOW (f
->menu_bar_window
);
2114 XSETFRAME (w
->frame
, f
);
2115 w
->pseudo_window_p
= 1;
2118 w
= XWINDOW (f
->menu_bar_window
);
2120 /* Set window dimensions to frame dimensions and allocate or
2121 adjust glyph matrices of W. */
2122 XSETFASTINT (w
->top
, 0);
2123 XSETFASTINT (w
->left
, 0);
2124 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2125 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2126 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2128 #endif /* not USE_X_TOOLKIT */
2130 /* Allocate/ reallocate matrices of the tool bar window. If we
2131 don't have a tool bar window yet, make one. */
2132 if (NILP (f
->tool_bar_window
))
2134 f
->tool_bar_window
= make_window ();
2135 w
= XWINDOW (f
->tool_bar_window
);
2136 XSETFRAME (w
->frame
, f
);
2137 w
->pseudo_window_p
= 1;
2140 w
= XWINDOW (f
->tool_bar_window
);
2142 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2143 XSETFASTINT (w
->left
, 0);
2144 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2145 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2146 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2150 /* Adjust/ allocate message buffer of frame F.
2152 Note that the message buffer is never freed. Since I could not
2153 find a free in 19.34, I assume that freeing it would be
2154 problematic in some way and don't do it either.
2156 (Implementation note: It should be checked if we can free it
2157 eventually without causing trouble). */
2160 adjust_frame_message_buffer (f
)
2163 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2165 if (FRAME_MESSAGE_BUF (f
))
2167 char *buffer
= FRAME_MESSAGE_BUF (f
);
2168 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2169 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2172 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2176 /* Re-allocate buffer for decode_mode_spec on frame F. */
2179 adjust_decode_mode_spec_buffer (f
)
2182 f
->decode_mode_spec_buffer
2183 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2184 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2189 /**********************************************************************
2190 Freeing Glyph Matrices
2191 **********************************************************************/
2193 /* Free glyph memory for a frame F. F may be null. This function can
2194 be called for the same frame more than once. The root window of
2195 F may be nil when this function is called. This is the case when
2196 the function is called when F is destroyed. */
2202 if (f
&& f
->glyphs_initialized_p
)
2204 /* Block interrupt input so that we don't get surprised by an X
2205 event while we're in an inconsistent state. */
2207 f
->glyphs_initialized_p
= 0;
2209 /* Release window sub-matrices. */
2210 if (!NILP (f
->root_window
))
2211 free_window_matrices (XWINDOW (f
->root_window
));
2213 /* Free the dummy window for menu bars without X toolkit and its
2215 if (!NILP (f
->menu_bar_window
))
2217 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2218 free_glyph_matrix (w
->desired_matrix
);
2219 free_glyph_matrix (w
->current_matrix
);
2220 w
->desired_matrix
= w
->current_matrix
= NULL
;
2221 f
->menu_bar_window
= Qnil
;
2224 /* Free the tool bar window and its glyph matrices. */
2225 if (!NILP (f
->tool_bar_window
))
2227 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2228 free_glyph_matrix (w
->desired_matrix
);
2229 free_glyph_matrix (w
->current_matrix
);
2230 w
->desired_matrix
= w
->current_matrix
= NULL
;
2231 f
->tool_bar_window
= Qnil
;
2234 /* Release frame glyph matrices. Reset fields to zero in
2235 case we are called a second time. */
2236 if (f
->desired_matrix
)
2238 free_glyph_matrix (f
->desired_matrix
);
2239 free_glyph_matrix (f
->current_matrix
);
2240 f
->desired_matrix
= f
->current_matrix
= NULL
;
2243 /* Release glyph pools. */
2244 if (f
->desired_pool
)
2246 free_glyph_pool (f
->desired_pool
);
2247 free_glyph_pool (f
->current_pool
);
2248 f
->desired_pool
= f
->current_pool
= NULL
;
2256 /* Free glyph sub-matrices in the window tree rooted at W. This
2257 function may be called with a null pointer, and it may be called on
2258 the same tree more than once. */
2261 free_window_matrices (w
)
2266 if (!NILP (w
->hchild
))
2267 free_window_matrices (XWINDOW (w
->hchild
));
2268 else if (!NILP (w
->vchild
))
2269 free_window_matrices (XWINDOW (w
->vchild
));
2272 /* This is a leaf window. Free its memory and reset fields
2273 to zero in case this function is called a second time for
2275 free_glyph_matrix (w
->current_matrix
);
2276 free_glyph_matrix (w
->desired_matrix
);
2277 w
->current_matrix
= w
->desired_matrix
= NULL
;
2280 /* Next window on same level. */
2281 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2286 /* Check glyph memory leaks. This function is called from
2287 shut_down_emacs. Note that frames are not destroyed when Emacs
2288 exits. We therefore free all glyph memory for all active frames
2289 explicitly and check that nothing is left allocated. */
2292 check_glyph_memory ()
2294 Lisp_Object tail
, frame
;
2296 /* Free glyph memory for all frames. */
2297 FOR_EACH_FRAME (tail
, frame
)
2298 free_glyphs (XFRAME (frame
));
2300 /* Check that nothing is left allocated. */
2301 if (glyph_matrix_count
)
2303 if (glyph_pool_count
)
2309 /**********************************************************************
2310 Building a Frame Matrix
2311 **********************************************************************/
2313 /* Most of the redisplay code works on glyph matrices attached to
2314 windows. This is a good solution most of the time, but it is not
2315 suitable for terminal code. Terminal output functions cannot rely
2316 on being able to set an arbitrary terminal window. Instead they
2317 must be provided with a view of the whole frame, i.e. the whole
2318 screen. We build such a view by constructing a frame matrix from
2319 window matrices in this section.
2321 Windows that must be updated have their must_be_update_p flag set.
2322 For all such windows, their desired matrix is made part of the
2323 desired frame matrix. For other windows, their current matrix is
2324 made part of the desired frame matrix.
2326 +-----------------+----------------+
2327 | desired | desired |
2329 +-----------------+----------------+
2332 +----------------------------------+
2334 Desired window matrices can be made part of the frame matrix in a
2335 cheap way: We exploit the fact that the desired frame matrix and
2336 desired window matrices share their glyph memory. This is not
2337 possible for current window matrices. Their glyphs are copied to
2338 the desired frame matrix. The latter is equivalent to
2339 preserve_other_columns in the old redisplay.
2341 Used glyphs counters for frame matrix rows are the result of adding
2342 up glyph lengths of the window matrices. A line in the frame
2343 matrix is enabled, if a corresponding line in a window matrix is
2346 After building the desired frame matrix, it will be passed to
2347 terminal code, which will manipulate both the desired and current
2348 frame matrix. Changes applied to the frame's current matrix have
2349 to be visible in current window matrices afterwards, of course.
2351 This problem is solved like this:
2353 1. Window and frame matrices share glyphs. Window matrices are
2354 constructed in a way that their glyph contents ARE the glyph
2355 contents needed in a frame matrix. Thus, any modification of
2356 glyphs done in terminal code will be reflected in window matrices
2359 2. Exchanges of rows in a frame matrix done by terminal code are
2360 intercepted by hook functions so that corresponding row operations
2361 on window matrices can be performed. This is necessary because we
2362 use pointers to glyphs in glyph row structures. To satisfy the
2363 assumption of point 1 above that glyphs are updated implicitly in
2364 window matrices when they are manipulated via the frame matrix,
2365 window and frame matrix must of course agree where to find the
2366 glyphs for their rows. Possible manipulations that must be
2367 mirrored are assignments of rows of the desired frame matrix to the
2368 current frame matrix and scrolling the current frame matrix. */
2370 /* Build frame F's desired matrix from window matrices. Only windows
2371 which have the flag must_be_updated_p set have to be updated. Menu
2372 bar lines of a frame are not covered by window matrices, so make
2373 sure not to touch them in this function. */
2376 build_frame_matrix (f
)
2381 /* F must have a frame matrix when this function is called. */
2382 xassert (!FRAME_WINDOW_P (f
));
2384 /* Clear all rows in the frame matrix covered by window matrices.
2385 Menu bar lines are not covered by windows. */
2386 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2387 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2389 /* Build the matrix by walking the window tree. */
2390 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2391 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2395 /* Walk a window tree, building a frame matrix MATRIX from window
2396 matrices. W is the root of a window tree. */
2399 build_frame_matrix_from_window_tree (matrix
, w
)
2400 struct glyph_matrix
*matrix
;
2405 if (!NILP (w
->hchild
))
2406 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2407 else if (!NILP (w
->vchild
))
2408 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2410 build_frame_matrix_from_leaf_window (matrix
, w
);
2412 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2417 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2418 desired frame matrix built. W is a leaf window whose desired or
2419 current matrix is to be added to FRAME_MATRIX. W's flag
2420 must_be_updated_p determines which matrix it contributes to
2421 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2422 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2423 Adding a desired matrix means setting up used counters and such in
2424 frame rows, while adding a current window matrix to FRAME_MATRIX
2425 means copying glyphs. The latter case corresponds to
2426 preserve_other_columns in the old redisplay. */
2429 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2430 struct glyph_matrix
*frame_matrix
;
2433 struct glyph_matrix
*window_matrix
;
2434 int window_y
, frame_y
;
2435 /* If non-zero, a glyph to insert at the right border of W. */
2436 GLYPH right_border_glyph
= 0;
2438 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2439 if (w
->must_be_updated_p
)
2441 window_matrix
= w
->desired_matrix
;
2443 /* Decide whether we want to add a vertical border glyph. */
2444 if (!WINDOW_RIGHTMOST_P (w
))
2446 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2447 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2448 ? XINT (DISP_BORDER_GLYPH (dp
))
2453 window_matrix
= w
->current_matrix
;
2455 /* For all rows in the window matrix and corresponding rows in the
2458 frame_y
= window_matrix
->matrix_y
;
2459 while (window_y
< window_matrix
->nrows
)
2461 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2462 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2463 int current_row_p
= window_matrix
== w
->current_matrix
;
2465 /* Fill up the frame row with spaces up to the left margin of the
2467 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2469 /* Fill up areas in the window matrix row with spaces. */
2470 fill_up_glyph_row_with_spaces (window_row
);
2472 /* If only part of W's desired matrix has been built, and
2473 window_row wasn't displayed, use the corresponding current
2475 if (window_matrix
== w
->desired_matrix
2476 && !window_row
->enabled_p
)
2478 window_row
= w
->current_matrix
->rows
+ window_y
;
2484 /* Copy window row to frame row. */
2485 bcopy (window_row
->glyphs
[0],
2486 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2487 window_matrix
->matrix_w
* sizeof (struct glyph
));
2491 xassert (window_row
->enabled_p
);
2493 /* Only when a desired row has been displayed, we want
2494 the corresponding frame row to be updated. */
2495 frame_row
->enabled_p
= 1;
2497 /* Maybe insert a vertical border between horizontally adjacent
2499 if (right_border_glyph
)
2501 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2502 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2505 #if 0 /* This shouldn't be necessary. Let's check it. */
2506 /* Due to hooks installed, it normally doesn't happen that
2507 window rows and frame rows of the same matrix are out of
2508 sync, i.e. have a different understanding of where to
2509 find glyphs for the row. The following is a safety-belt
2510 that doesn't cost much and makes absolutely sure that
2511 window and frame matrices are in sync. */
2512 if (!glyph_row_slice_p (window_row
, frame_row
))
2514 /* Find the row in the window being a slice. There
2515 should exist one from program logic. */
2516 struct glyph_row
*slice_row
2517 = find_glyph_row_slice (window_matrix
, frame_matrix
, frame_y
);
2518 xassert (slice_row
!= 0);
2520 /* Exchange glyphs between both window rows. */
2521 swap_glyphs_in_rows (window_row
, slice_row
);
2523 /* Exchange pointers between both rows. */
2524 swap_glyph_pointers (window_row
, slice_row
);
2528 /* Window row window_y must be a slice of frame row
2530 xassert (glyph_row_slice_p (window_row
, frame_row
));
2532 /* If rows are in sync, we don't have to copy glyphs because
2533 frame and window share glyphs. */
2536 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2540 /* Set number of used glyphs in the frame matrix. Since we fill
2541 up with spaces, and visit leaf windows from left to right it
2542 can be done simply. */
2543 frame_row
->used
[TEXT_AREA
]
2544 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2546 /* Or in other flags. */
2547 frame_row
->inverse_p
|= window_row
->inverse_p
;
2556 /* Add spaces to a glyph row ROW in a window matrix.
2558 Each row has the form:
2560 +---------+-----------------------------+------------+
2561 | left | text | right |
2562 +---------+-----------------------------+------------+
2564 Left and right marginal areas are optional. This function adds
2565 spaces to areas so that there are no empty holes between areas.
2566 In other words: If the right area is not empty, the text area
2567 is filled up with spaces up to the right area. If the text area
2568 is not empty, the left area is filled up.
2570 To be called for frame-based redisplay, only. */
2573 fill_up_glyph_row_with_spaces (row
)
2574 struct glyph_row
*row
;
2576 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2577 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2578 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2582 /* Fill area AREA of glyph row ROW with spaces. To be called for
2583 frame-based redisplay only. */
2586 fill_up_glyph_row_area_with_spaces (row
, area
)
2587 struct glyph_row
*row
;
2590 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2592 struct glyph
*end
= row
->glyphs
[area
+ 1];
2593 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2596 *text
++ = space_glyph
;
2597 row
->used
[area
] = text
- row
->glyphs
[area
];
2602 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2603 reached. In frame matrices only one area, TEXT_AREA, is used. */
2606 fill_up_frame_row_with_spaces (row
, upto
)
2607 struct glyph_row
*row
;
2610 int i
= row
->used
[TEXT_AREA
];
2611 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2614 glyph
[i
++] = space_glyph
;
2616 row
->used
[TEXT_AREA
] = i
;
2621 /**********************************************************************
2622 Mirroring operations on frame matrices in window matrices
2623 **********************************************************************/
2625 /* Set frame being updated via frame-based redisplay to F. This
2626 function must be called before updates to make explicit that we are
2627 working on frame matrices or not. */
2630 set_frame_matrix_frame (f
)
2633 frame_matrix_frame
= f
;
2637 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2638 DESIRED_MATRIX is the desired matrix corresponding to
2639 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2640 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2641 frame_matrix_frame is non-null, this indicates that the exchange is
2642 done in frame matrices, and that we have to perform analogous
2643 operations in window matrices of frame_matrix_frame. */
2646 make_current (desired_matrix
, current_matrix
, row
)
2647 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2650 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2651 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2652 int mouse_face_p
= current_row
->mouse_face_p
;
2654 /* Do current_row = desired_row. This exchanges glyph pointers
2655 between both rows, and does a structure assignment otherwise. */
2656 assign_row (current_row
, desired_row
);
2658 /* Enable current_row to mark it as valid. */
2659 current_row
->enabled_p
= 1;
2660 current_row
->mouse_face_p
= mouse_face_p
;
2662 /* If we are called on frame matrices, perform analogous operations
2663 for window matrices. */
2664 if (frame_matrix_frame
)
2665 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2669 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2670 W's frame which has been made current (by swapping pointers between
2671 current and desired matrix). Perform analogous operations in the
2672 matrices of leaf windows in the window tree rooted at W. */
2675 mirror_make_current (w
, frame_row
)
2681 if (!NILP (w
->hchild
))
2682 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2683 else if (!NILP (w
->vchild
))
2684 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2687 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2688 here because the checks performed in debug mode there
2689 will not allow the conversion. */
2690 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2692 /* If FRAME_ROW is within W, assign the desired row to the
2693 current row (exchanging glyph pointers). */
2694 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2696 struct glyph_row
*current_row
2697 = MATRIX_ROW (w
->current_matrix
, row
);
2698 struct glyph_row
*desired_row
2699 = MATRIX_ROW (w
->desired_matrix
, row
);
2701 if (desired_row
->enabled_p
)
2702 assign_row (current_row
, desired_row
);
2704 swap_glyph_pointers (desired_row
, current_row
);
2705 current_row
->enabled_p
= 1;
2709 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2714 /* Perform row dance after scrolling. We are working on the range of
2715 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2716 including) in MATRIX. COPY_FROM is a vector containing, for each
2717 row I in the range 0 <= I < NLINES, the index of the original line
2718 to move to I. This index is relative to the row range, i.e. 0 <=
2719 index < NLINES. RETAINED_P is a vector containing zero for each
2720 row 0 <= I < NLINES which is empty.
2722 This function is called from do_scrolling and do_direct_scrolling. */
2725 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2727 struct glyph_matrix
*matrix
;
2728 int unchanged_at_top
, nlines
;
2732 /* A copy of original rows. */
2733 struct glyph_row
*old_rows
;
2735 /* Rows to assign to. */
2736 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2740 /* Make a copy of the original rows. */
2741 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2742 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2744 /* Assign new rows, maybe clear lines. */
2745 for (i
= 0; i
< nlines
; ++i
)
2747 int enabled_before_p
= new_rows
[i
].enabled_p
;
2749 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2750 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2751 new_rows
[i
] = old_rows
[copy_from
[i
]];
2752 new_rows
[i
].enabled_p
= enabled_before_p
;
2754 /* RETAINED_P is zero for empty lines. */
2755 if (!retained_p
[copy_from
[i
]])
2756 new_rows
[i
].enabled_p
= 0;
2759 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2760 if (frame_matrix_frame
)
2761 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2762 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2766 /* Synchronize glyph pointers in the current matrix of window W with
2767 the current frame matrix. W must be full-width, and be on a tty
2771 sync_window_with_frame_matrix_rows (w
)
2774 struct frame
*f
= XFRAME (w
->frame
);
2775 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2777 /* Preconditions: W must be a leaf window and full-width. Its frame
2778 must have a frame matrix. */
2779 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2780 xassert (WINDOW_FULL_WIDTH_P (w
));
2781 xassert (!FRAME_WINDOW_P (f
));
2783 /* If W is a full-width window, glyph pointers in W's current matrix
2784 have, by definition, to be the same as glyph pointers in the
2785 corresponding frame matrix. */
2786 window_row
= w
->current_matrix
->rows
;
2787 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2788 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
2789 while (window_row
< window_row_end
)
2793 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
2794 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
2796 ++window_row
, ++frame_row
;
2801 /* Return the window in the window tree rooted in W containing frame
2802 row ROW. Value is null if none is found. */
2805 frame_row_to_window (w
, row
)
2809 struct window
*found
= NULL
;
2813 if (!NILP (w
->hchild
))
2814 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
2815 else if (!NILP (w
->vchild
))
2816 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
2817 else if (row
>= XFASTINT (w
->top
)
2818 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
2821 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2828 /* Perform a line dance in the window tree rooted at W, after
2829 scrolling a frame matrix in mirrored_line_dance.
2831 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
2832 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
2833 COPY_FROM is a vector containing, for each row I in the range 0 <=
2834 I < NLINES, the index of the original line to move to I. This
2835 index is relative to the row range, i.e. 0 <= index < NLINES.
2836 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
2840 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
2842 int unchanged_at_top
, nlines
;
2848 if (!NILP (w
->hchild
))
2849 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
2850 nlines
, copy_from
, retained_p
);
2851 else if (!NILP (w
->vchild
))
2852 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
2853 nlines
, copy_from
, retained_p
);
2856 /* W is a leaf window, and we are working on its current
2858 struct glyph_matrix
*m
= w
->current_matrix
;
2860 struct glyph_row
*old_rows
;
2862 /* Make a copy of the original rows of matrix m. */
2863 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
2864 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
2866 for (i
= 0; i
< nlines
; ++i
)
2868 /* Frame relative line assigned to. */
2869 int frame_to
= i
+ unchanged_at_top
;
2871 /* Frame relative line assigned. */
2872 int frame_from
= copy_from
[i
] + unchanged_at_top
;
2874 /* Window relative line assigned to. */
2875 int window_to
= frame_to
- m
->matrix_y
;
2877 /* Window relative line assigned. */
2878 int window_from
= frame_from
- m
->matrix_y
;
2880 /* Is assigned line inside window? */
2881 int from_inside_window_p
2882 = window_from
>= 0 && window_from
< m
->matrix_h
;
2884 /* Is assigned to line inside window? */
2885 int to_inside_window_p
2886 = window_to
>= 0 && window_to
< m
->matrix_h
;
2888 if (from_inside_window_p
&& to_inside_window_p
)
2890 /* Enabled setting before assignment. */
2891 int enabled_before_p
;
2893 /* Do the assignment. The enabled_p flag is saved
2894 over the assignment because the old redisplay did
2896 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
2897 m
->rows
[window_to
] = old_rows
[window_from
];
2898 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
2900 /* If frame line is empty, window line is empty, too. */
2901 if (!retained_p
[copy_from
[i
]])
2902 m
->rows
[window_to
].enabled_p
= 0;
2904 else if (to_inside_window_p
)
2906 /* A copy between windows. This is an infrequent
2907 case not worth optimizing. */
2908 struct frame
*f
= XFRAME (w
->frame
);
2909 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
2911 struct glyph_matrix
*m2
;
2914 w2
= frame_row_to_window (root
, frame_to
);
2915 m2
= w2
->current_matrix
;
2916 m2_from
= frame_from
- m2
->matrix_y
;
2917 copy_row_except_pointers (m
->rows
+ window_to
,
2918 m2
->rows
+ m2_from
);
2920 /* If frame line is empty, window line is empty, too. */
2921 if (!retained_p
[copy_from
[i
]])
2922 m
->rows
[window_to
].enabled_p
= 0;
2925 else if (from_inside_window_p
)
2929 /* If there was a copy between windows, make sure glyph
2930 pointers are in sync with the frame matrix. */
2932 sync_window_with_frame_matrix_rows (w
);
2934 /* Check that no pointers are lost. */
2938 /* Next window on same level. */
2939 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2946 /* Check that window and frame matrices agree about their
2947 understanding where glyphs of the rows are to find. For each
2948 window in the window tree rooted at W, check that rows in the
2949 matrices of leaf window agree with their frame matrices about
2953 check_window_matrix_pointers (w
)
2958 if (!NILP (w
->hchild
))
2959 check_window_matrix_pointers (XWINDOW (w
->hchild
));
2960 else if (!NILP (w
->vchild
))
2961 check_window_matrix_pointers (XWINDOW (w
->vchild
));
2964 struct frame
*f
= XFRAME (w
->frame
);
2965 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
2966 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
2969 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2974 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
2975 a window and FRAME_MATRIX is the corresponding frame matrix. For
2976 each row in WINDOW_MATRIX check that it's a slice of the
2977 corresponding frame row. If it isn't, abort. */
2980 check_matrix_pointers (window_matrix
, frame_matrix
)
2981 struct glyph_matrix
*window_matrix
, *frame_matrix
;
2983 /* Row number in WINDOW_MATRIX. */
2986 /* Row number corresponding to I in FRAME_MATRIX. */
2987 int j
= window_matrix
->matrix_y
;
2989 /* For all rows check that the row in the window matrix is a
2990 slice of the row in the frame matrix. If it isn't we didn't
2991 mirror an operation on the frame matrix correctly. */
2992 while (i
< window_matrix
->nrows
)
2994 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
2995 frame_matrix
->rows
+ j
))
3001 #endif /* GLYPH_DEBUG != 0 */
3005 /**********************************************************************
3006 VPOS and HPOS translations
3007 **********************************************************************/
3011 /* Translate vertical position VPOS which is relative to window W to a
3012 vertical position relative to W's frame. */
3015 window_to_frame_vpos (w
, vpos
)
3019 struct frame
*f
= XFRAME (w
->frame
);
3021 xassert (!FRAME_WINDOW_P (f
));
3022 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3023 vpos
+= XFASTINT (w
->top
);
3024 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3029 /* Translate horizontal position HPOS which is relative to window W to
3030 a vertical position relative to W's frame. */
3033 window_to_frame_hpos (w
, hpos
)
3037 struct frame
*f
= XFRAME (w
->frame
);
3039 xassert (!FRAME_WINDOW_P (f
));
3040 hpos
+= XFASTINT (w
->left
);
3044 #endif /* GLYPH_DEBUG */
3048 /**********************************************************************
3050 **********************************************************************/
3052 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3053 "Clear frame FRAME and output again what is supposed to appear on it.")
3059 CHECK_LIVE_FRAME (frame
, 0);
3062 /* Ignore redraw requests, if frame has no glyphs yet.
3063 (Implementation note: It still has to be checked why we are
3064 called so early here). */
3065 if (!glyphs_initialized_initially_p
)
3069 if (FRAME_MSDOS_P (f
))
3070 set_terminal_modes ();
3072 clear_current_matrices (f
);
3075 windows_or_buffers_changed
++;
3076 /* Mark all windows as inaccurate, so that every window will have
3077 its redisplay done. */
3078 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3079 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3085 /* Redraw frame F. This is nothing more than a call to the Lisp
3086 function redraw-frame. */
3093 XSETFRAME (frame
, f
);
3094 Fredraw_frame (frame
);
3098 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3099 "Clear and redisplay all visible frames.")
3102 Lisp_Object tail
, frame
;
3104 FOR_EACH_FRAME (tail
, frame
)
3105 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3106 Fredraw_frame (frame
);
3112 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3113 visible frames marked as garbaged. */
3116 redraw_garbaged_frames ()
3118 Lisp_Object tail
, frame
;
3120 FOR_EACH_FRAME (tail
, frame
)
3121 if (FRAME_VISIBLE_P (XFRAME (frame
))
3122 && FRAME_GARBAGED_P (XFRAME (frame
)))
3123 Fredraw_frame (frame
);
3128 /***********************************************************************
3130 ***********************************************************************/
3132 /* Try to update display and current glyph matrix directly.
3134 This function is called after a character G has been inserted into
3135 current_buffer. It tries to update the current glyph matrix and
3136 perform appropriate screen output to reflect the insertion. If it
3137 succeeds, the global flag redisplay_performed_directly_p will be
3138 set to 1, and thereby prevent the more costly general redisplay
3139 from running (see redisplay_internal).
3141 This function is not called for `hairy' character insertions.
3142 In particular, it is not called when after or before change
3143 functions exist, like they are used by font-lock. See keyboard.c
3144 for details where this function is called. */
3147 direct_output_for_insert (g
)
3150 register struct frame
*f
= SELECTED_FRAME ();
3151 struct window
*w
= XWINDOW (selected_window
);
3153 struct glyph_row
*glyph_row
;
3154 struct glyph
*glyphs
, *glyph
, *end
;
3156 /* Non-null means that Redisplay of W is based on window matrices. */
3157 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3158 /* Non-null means we are in overwrite mode. */
3159 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3161 struct text_pos pos
;
3162 int delta
, delta_bytes
;
3164 /* Not done directly. */
3165 redisplay_performed_directly_p
= 0;
3167 /* Quickly give up for some common cases. */
3168 if (cursor_in_echo_area
3169 /* Give up if fonts have changed. */
3171 /* Give up if face attributes have been changed. */
3172 || face_change_count
3173 /* Give up if cursor position not really known. */
3174 || !display_completed
3175 /* Give up if buffer appears in two places. */
3176 || buffer_shared
> 1
3177 /* Give up if w is mini-buffer and a message is being displayed there */
3178 || (MINI_WINDOW_P (w
) && !NILP (echo_area_buffer
[0]))
3179 /* Give up for hscrolled mini-buffer because display of the prompt
3180 is handled specially there (see display_line). */
3181 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3182 /* Give up if overwriting in the middle of a line. */
3185 && FETCH_BYTE (PT
) != '\n')
3186 /* Give up for tabs and line ends. */
3190 /* Give up if unable to display the cursor in the window. */
3191 || w
->cursor
.vpos
< 0
3192 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3193 /* Can't do it in a continued line because continuation
3194 lines would change. */
3195 (glyph_row
->continued_p
3196 /* Can't use this method if the line overlaps others or is
3197 overlapped by others because these other lines would
3198 have to be redisplayed. */
3199 || glyph_row
->overlapping_p
3200 || glyph_row
->overlapped_p
))
3201 /* Can't do it for partial width windows on terminal frames
3202 because we can't clear to eol in such a window. */
3203 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3206 /* Set up a display iterator structure for W. Glyphs will be
3207 produced in scratch_glyph_row. Current position is W's cursor
3209 clear_glyph_row (&scratch_glyph_row
);
3210 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3211 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3212 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3215 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3216 if (glyph_row
->mouse_face_p
)
3219 /* Give up if highlighting trailing whitespace and we have trailing
3220 whitespace in glyph_row. We would have to remove the trailing
3221 whitespace face in that case. */
3222 if (!NILP (Vshow_trailing_whitespace
)
3223 && glyph_row
->used
[TEXT_AREA
])
3227 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3228 if (last
->type
== STRETCH_GLYPH
3229 || (last
->type
== CHAR_GLYPH
3230 && last
->u
.ch
== ' '))
3234 /* Give up if there are overlay strings at pos. This would fail
3235 if the overlay string has newlines in it. */
3236 if (STRINGP (it
.string
))
3239 it
.hpos
= w
->cursor
.hpos
;
3240 it
.vpos
= w
->cursor
.vpos
;
3241 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3242 it
.current_y
= w
->cursor
.y
;
3243 it
.end_charpos
= PT
;
3244 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3246 /* More than one display element may be returned for PT - 1 if
3247 (i) it's a control character which is translated into `\003' or
3248 `^C', or (ii) it has a display table entry, or (iii) it's a
3249 combination of both. */
3250 delta
= delta_bytes
= 0;
3251 while (get_next_display_element (&it
))
3253 PRODUCE_GLYPHS (&it
);
3255 /* Give up if glyph doesn't fit completely on the line. */
3256 if (it
.current_x
>= it
.last_visible_x
)
3259 /* Give up if new glyph has different ascent or descent than
3260 the original row, or if it is not a character glyph. */
3261 if (glyph_row
->ascent
!= it
.ascent
3262 || glyph_row
->height
!= it
.ascent
+ it
.descent
3263 || glyph_row
->phys_ascent
!= it
.phys_ascent
3264 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3265 || it
.what
!= IT_CHARACTER
)
3269 delta_bytes
+= it
.len
;
3270 set_iterator_to_next (&it
, 1);
3273 /* Give up if we hit the right edge of the window. We would have
3274 to insert truncation or continuation glyphs. */
3275 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3276 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3279 /* Give up if there is a \t following in the line. */
3281 it2
.end_charpos
= ZV
;
3282 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3283 while (get_next_display_element (&it2
)
3284 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3288 set_iterator_to_next (&it2
, 1);
3291 /* Number of new glyphs produced. */
3292 n
= it
.glyph_row
->used
[TEXT_AREA
];
3294 /* Start and end of glyphs in original row. */
3295 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3296 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3298 /* Make room for new glyphs, then insert them. */
3299 xassert (end
- glyphs
- n
>= 0);
3300 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3301 (end
- glyphs
- n
) * sizeof (*end
));
3302 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3303 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3304 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3306 /* Compute new line width. */
3307 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3308 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3309 glyph_row
->pixel_width
= glyph_row
->x
;
3312 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3316 /* Increment buffer positions for glyphs following the newly
3318 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3319 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3320 glyph
->charpos
+= delta
;
3322 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3324 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3325 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3328 /* Adjust positions in lines following the one we are in. */
3329 increment_matrix_positions (w
->current_matrix
,
3331 w
->current_matrix
->nrows
,
3332 delta
, delta_bytes
);
3334 glyph_row
->contains_overlapping_glyphs_p
3335 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3337 glyph_row
->displays_text_p
= 1;
3338 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3339 XFASTINT (w
->window_end_vpos
)));
3341 if (!NILP (Vshow_trailing_whitespace
))
3342 highlight_trailing_whitespace (it
.f
, glyph_row
);
3344 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3345 In the middle, we have to insert glyphs. Note that this is now
3346 implemented for X frames. The implementation uses updated_window
3348 updated_row
= glyph_row
;
3352 rif
->update_window_begin_hook (w
);
3354 if (glyphs
== end
- n
)
3355 rif
->write_glyphs (glyphs
, n
);
3357 rif
->insert_glyphs (glyphs
, n
);
3361 if (glyphs
== end
- n
)
3362 write_glyphs (glyphs
, n
);
3364 insert_glyphs (glyphs
, n
);
3367 w
->cursor
.hpos
+= n
;
3368 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3369 xassert (w
->cursor
.hpos
>= 0
3370 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3372 /* How to set the cursor differs depending on whether we are
3373 using a frame matrix or a window matrix. Note that when
3374 a frame matrix is used, cursor_to expects frame coordinates,
3375 and the X and Y parameters are not used. */
3376 if (window_redisplay_p
)
3377 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3378 w
->cursor
.y
, w
->cursor
.x
);
3382 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3383 + (INTEGERP (w
->left_margin_width
)
3384 ? XFASTINT (w
->left_margin_width
)
3386 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3391 rif
->update_window_end_hook (w
, 1, 0);
3396 TRACE ((stderr
, "direct output for insert\n"));
3398 UNCHANGED_MODIFIED
= MODIFF
;
3399 BEG_UNCHANGED
= GPT
- BEG
;
3400 XSETFASTINT (w
->last_point
, PT
);
3401 w
->last_cursor
= w
->cursor
;
3402 XSETFASTINT (w
->last_modified
, MODIFF
);
3403 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3405 redisplay_performed_directly_p
= 1;
3410 /* Perform a direct display update for moving PT by N positions
3411 left or right. N < 0 means a movement backwards. This function
3412 is currently only called for N == 1 or N == -1. */
3415 direct_output_forward_char (n
)
3418 struct frame
*f
= SELECTED_FRAME ();
3419 struct window
*w
= XWINDOW (selected_window
);
3420 struct glyph_row
*row
;
3422 /* Give up if point moved out of or into a composition. */
3423 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3424 current_buffer
, PT
))
3427 /* Give up if face attributes have been changed. */
3428 if (face_change_count
)
3431 /* Give up if current matrix is not up to date or we are
3432 displaying a message. */
3433 if (!display_completed
|| cursor_in_echo_area
)
3436 /* Give up if the buffer's direction is reversed. */
3437 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3440 /* Can't use direct output if highlighting a region. */
3441 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3444 /* Can't use direct output if highlighting trailing whitespace. */
3445 if (!NILP (Vshow_trailing_whitespace
))
3448 /* Give up if we are showing a message or just cleared the message
3449 because we might need to resize the echo area window. */
3450 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3453 /* Give up if currently displaying a message instead of the
3454 minibuffer contents. */
3455 if (XWINDOW (minibuf_window
) == w
3456 && EQ (minibuf_window
, echo_area_window
))
3459 /* Give up if we don't know where the cursor is. */
3460 if (w
->cursor
.vpos
< 0)
3463 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3465 /* Give up if PT is outside of the last known cursor row. */
3466 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3467 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3470 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3472 w
->last_cursor
= w
->cursor
;
3473 XSETFASTINT (w
->last_point
, PT
);
3475 xassert (w
->cursor
.hpos
>= 0
3476 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3478 if (FRAME_WINDOW_P (f
))
3479 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3480 w
->cursor
.y
, w
->cursor
.x
);
3484 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3485 + (INTEGERP (w
->left_margin_width
)
3486 ? XFASTINT (w
->left_margin_width
)
3488 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3493 redisplay_performed_directly_p
= 1;
3499 /***********************************************************************
3501 ***********************************************************************/
3503 /* Update frame F based on the data in desired matrices.
3505 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3506 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3509 Value is non-zero if redisplay was stopped due to pending input. */
3512 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3515 int inhibit_hairy_id_p
;
3517 /* 1 means display has been paused because of pending input. */
3519 struct window
*root_window
= XWINDOW (f
->root_window
);
3521 if (FRAME_WINDOW_P (f
))
3523 /* We are working on window matrix basis. All windows whose
3524 flag must_be_updated_p is set have to be updated. */
3526 /* Record that we are not working on frame matrices. */
3527 set_frame_matrix_frame (NULL
);
3529 /* Update all windows in the window tree of F, maybe stopping
3530 when pending input is detected. */
3533 /* Update the menu bar on X frames that don't have toolkit
3535 if (WINDOWP (f
->menu_bar_window
))
3536 update_window (XWINDOW (f
->menu_bar_window
), 1);
3538 /* Update the tool-bar window, if present. */
3539 if (WINDOWP (f
->tool_bar_window
))
3542 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3544 /* Update tool-bar window. */
3545 if (w
->must_be_updated_p
)
3547 update_window (w
, 1);
3548 w
->must_be_updated_p
= 0;
3550 /* Swap tool-bar strings. We swap because we want to
3552 tem
= f
->current_tool_bar_string
;
3553 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3554 f
->desired_tool_bar_string
= tem
;
3555 f
->n_current_tool_bar_items
= f
->n_desired_tool_bar_items
;
3557 /* Swap tool-bar items. We swap because we want to
3559 tem
= f
->current_tool_bar_items
;
3560 f
->current_tool_bar_items
= f
->desired_tool_bar_items
;
3561 f
->desired_tool_bar_items
= tem
;
3566 /* Update windows. */
3567 paused_p
= update_window_tree (root_window
, force_p
);
3570 #if 0 /* This flush is a performance bottleneck under X,
3571 and it doesn't seem to be necessary anyway. */
3572 rif
->flush_display (f
);
3577 /* We are working on frame matrix basis. Set the frame on whose
3578 frame matrix we operate. */
3579 set_frame_matrix_frame (f
);
3581 /* Build F's desired matrix from window matrices. */
3582 build_frame_matrix (f
);
3584 /* Update the display */
3586 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3590 fflush (termscript
);
3593 /* Check window matrices for lost pointers. */
3594 IF_DEBUG (check_window_matrix_pointers (root_window
));
3597 /* Reset flags indicating that a window should be updated. */
3598 set_window_update_flags (root_window
, 0);
3600 display_completed
= !paused_p
;
3606 /************************************************************************
3607 Window-based updates
3608 ************************************************************************/
3610 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3611 don't stop updating when input is pending. */
3614 update_window_tree (w
, force_p
)
3620 while (w
&& !paused_p
)
3622 if (!NILP (w
->hchild
))
3623 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3624 else if (!NILP (w
->vchild
))
3625 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3626 else if (w
->must_be_updated_p
)
3627 paused_p
|= update_window (w
, force_p
);
3629 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3636 /* Update window W if its flag must_be_updated_p is non-zero. If
3637 FORCE_P is non-zero, don't stop updating if input is pending. */
3640 update_single_window (w
, force_p
)
3644 if (w
->must_be_updated_p
)
3646 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3648 /* Record that this is not a frame-based redisplay. */
3649 set_frame_matrix_frame (NULL
);
3653 update_window (w
, force_p
);
3656 /* Reset flag in W. */
3657 w
->must_be_updated_p
= 0;
3662 /* Redraw lines from the current matrix of window W that are
3663 overlapped by other rows. YB is bottom-most y-position in W. */
3666 redraw_overlapped_rows (w
, yb
)
3672 /* If rows overlapping others have been changed, the rows being
3673 overlapped have to be redrawn. This won't draw lines that have
3674 already been drawn in update_window_line because overlapped_p in
3675 desired rows is 0, so after row assignment overlapped_p in
3676 current rows is 0. */
3677 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3679 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3681 if (!row
->enabled_p
)
3683 else if (row
->mode_line_p
)
3686 if (row
->overlapped_p
)
3688 enum glyph_row_area area
;
3690 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3693 updated_area
= area
;
3694 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3695 if (row
->used
[area
])
3696 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3697 rif
->clear_end_of_line (-1);
3700 row
->overlapped_p
= 0;
3703 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3709 /* Redraw lines from the current matrix of window W that overlap
3710 others. YB is bottom-most y-position in W. */
3713 redraw_overlapping_rows (w
, yb
)
3718 struct glyph_row
*row
;
3720 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3722 row
= w
->current_matrix
->rows
+ i
;
3724 if (!row
->enabled_p
)
3726 else if (row
->mode_line_p
)
3729 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3731 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3733 if (row
->used
[LEFT_MARGIN_AREA
])
3734 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3736 if (row
->used
[TEXT_AREA
])
3737 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3739 if (row
->used
[RIGHT_MARGIN_AREA
])
3740 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3742 /* Record in neighbor rows that ROW overwrites part of their
3744 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3745 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3746 if ((row
->phys_height
- row
->phys_ascent
3747 > row
->height
- row
->ascent
)
3749 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3758 /* Update display of window W. FORCE_P non-zero means that we should
3759 not stop when detecting pending input. */
3762 update_window (w
, force_p
)
3766 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3768 int preempt_count
= baud_rate
/ 2400 + 1;
3769 extern int input_pending
;
3771 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3772 extern struct frame
*updating_frame
;
3775 /* Check that W's frame doesn't have glyph matrices. */
3776 xassert (FRAME_WINDOW_P (f
));
3777 xassert (updating_frame
!= NULL
);
3779 /* Check pending input the first time so that we can quickly return. */
3780 if (redisplay_dont_pause
)
3783 detect_input_pending ();
3785 /* If forced to complete the update, or if no input is pending, do
3787 if (force_p
|| !input_pending
)
3789 struct glyph_row
*row
, *end
;
3790 struct glyph_row
*mode_line_row
;
3791 struct glyph_row
*header_line_row
= NULL
;
3792 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0;
3794 rif
->update_window_begin_hook (w
);
3795 yb
= window_text_bottom_y (w
);
3797 /* If window has a top line, update it before everything else.
3798 Adjust y-positions of other rows by the top line height. */
3799 row
= desired_matrix
->rows
;
3800 end
= row
+ desired_matrix
->nrows
- 1;
3801 if (row
->mode_line_p
)
3802 header_line_row
= row
++;
3804 /* Update the mode line, if necessary. */
3805 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3806 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3808 mode_line_row
->y
= yb
;
3809 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3811 &mouse_face_overwritten_p
);
3815 /* Find first enabled row. Optimizations in redisplay_internal
3816 may lead to an update with only one row enabled. There may
3817 be also completely empty matrices. */
3818 while (row
< end
&& !row
->enabled_p
)
3821 /* Try reusing part of the display by copying. */
3822 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3824 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3827 /* All rows were found to be equal. */
3836 /* Update the top mode line after scrolling because a new top
3837 line would otherwise overwrite lines at the top of the window
3838 that can be scrolled. */
3839 if (header_line_row
&& header_line_row
->enabled_p
)
3841 header_line_row
->y
= 0;
3842 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3846 /* Update the rest of the lines. */
3847 for (; row
< end
&& (force_p
|| !input_pending
); ++row
)
3850 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3853 /* We'll Have to play a little bit with when to
3854 detect_input_pending. If it's done too often,
3855 scrolling large windows with repeated scroll-up
3856 commands will too quickly pause redisplay. */
3857 if (!force_p
&& vpos
% preempt_count
== 0)
3858 detect_input_pending ();
3860 changed_p
|= update_window_line (w
, vpos
,
3861 &mouse_face_overwritten_p
);
3863 /* Mark all rows below the last visible one in the current
3864 matrix as invalid. This is necessary because of
3865 variable line heights. Consider the case of three
3866 successive redisplays, where the first displays 5
3867 lines, the second 3 lines, and the third 5 lines again.
3868 If the second redisplay wouldn't mark rows in the
3869 current matrix invalid, the third redisplay might be
3870 tempted to optimize redisplay based on lines displayed
3871 in the first redisplay. */
3872 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3873 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3874 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3877 /* Was display preempted? */
3878 paused_p
= row
< end
;
3882 /* Fix the appearance of overlapping(overlapped rows. */
3883 if (!paused_p
&& !w
->pseudo_window_p
)
3885 if (changed_p
&& rif
->fix_overlapping_area
)
3887 redraw_overlapped_rows (w
, yb
);
3888 redraw_overlapping_rows (w
, yb
);
3891 /* Make cursor visible at cursor position of W. */
3892 set_window_cursor_after_update (w
);
3894 #if 0 /* Check that current matrix invariants are satisfied. This is
3895 for debugging only. See the comment of check_matrix_invariants. */
3896 IF_DEBUG (check_matrix_invariants (w
));
3901 /* Remember the redisplay method used to display the matrix. */
3902 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3905 /* End of update of window W. */
3906 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
3911 clear_glyph_matrix (desired_matrix
);
3917 /* Update the display of area AREA in window W, row number VPOS.
3918 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3921 update_marginal_area (w
, area
, vpos
)
3925 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3927 /* Let functions in xterm.c know what area subsequent X positions
3928 will be relative to. */
3929 updated_area
= area
;
3931 /* Set cursor to start of glyphs, write them, and clear to the end
3932 of the area. I don't think that something more sophisticated is
3933 necessary here, since marginal areas will not be the default. */
3934 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3935 if (desired_row
->used
[area
])
3936 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3937 rif
->clear_end_of_line (-1);
3941 /* Update the display of the text area of row VPOS in window W.
3942 Value is non-zero if display has changed. */
3945 update_text_area (w
, vpos
)
3949 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3950 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3953 /* Let functions in xterm.c know what area subsequent X positions
3954 will be relative to. */
3955 updated_area
= TEXT_AREA
;
3957 /* If rows are at different X or Y, or rows have different height,
3958 or the current row is marked invalid, write the entire line. */
3959 if (!current_row
->enabled_p
3960 || desired_row
->y
!= current_row
->y
3961 || desired_row
->ascent
!= current_row
->ascent
3962 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3963 || desired_row
->phys_height
!= current_row
->phys_height
3964 || desired_row
->visible_height
!= current_row
->visible_height
3965 || current_row
->overlapped_p
3966 || current_row
->mouse_face_p
3967 || current_row
->x
!= desired_row
->x
)
3969 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3971 if (desired_row
->used
[TEXT_AREA
])
3972 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3973 desired_row
->used
[TEXT_AREA
]);
3975 /* Clear to end of window. */
3976 rif
->clear_end_of_line (-1);
3982 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3983 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3984 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3986 /* If the desired row extends its face to the text area end,
3987 make sure we write at least one glyph, so that the face
3988 extension actually takes place. */
3989 int desired_stop_pos
= (desired_row
->used
[TEXT_AREA
]
3990 - (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3993 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4001 /* Skip over glyphs that both rows have in common. These
4002 don't have to be written. We can't skip if the last
4003 current glyph overlaps the glyph to its right. For
4004 example, consider a current row of `if ' with the `f' in
4005 Courier bold so that it overlaps the ` ' to its right.
4006 If the desired row is ` ', we would skip over the space
4007 after the `if' and there would remain a pixel from the
4008 `f' on the screen. */
4009 if (overlapping_glyphs_p
&& i
> 0)
4011 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4014 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4016 can_skip_p
= right
== 0;
4022 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4024 x
+= desired_glyph
->pixel_width
;
4025 ++desired_glyph
, ++current_glyph
, ++i
;
4028 /* Consider the case that the current row contains "xxx
4029 ppp ggg" in italic Courier font, and the desired row
4030 is "xxx ggg". The character `p' has lbearing, `g'
4031 has not. The loop above will stop in front of the
4032 first `p' in the current row. If we would start
4033 writing glyphs there, we wouldn't erase the lbearing
4034 of the `p'. The rest of the lbearing problem is then
4035 taken care of by x_draw_glyphs. */
4036 if (overlapping_glyphs_p
4038 && i
< current_row
->used
[TEXT_AREA
]
4039 && (current_row
->used
[TEXT_AREA
]
4040 != desired_row
->used
[TEXT_AREA
]))
4044 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4046 while (left
> 0 && i
> 0)
4048 --i
, --desired_glyph
, --current_glyph
;
4049 x
-= desired_glyph
->pixel_width
;
4050 left
-= desired_glyph
->pixel_width
;
4055 /* Try to avoid writing the entire rest of the desired row
4056 by looking for a resync point. This mainly prevents
4057 mode line flickering in the case the mode line is in
4058 fixed-pitch font, which it usually will be. */
4059 if (i
< desired_row
->used
[TEXT_AREA
])
4061 int start_x
= x
, start_hpos
= i
;
4062 struct glyph
*start
= desired_glyph
;
4064 int skip_first_p
= !can_skip_p
;
4066 /* Find the next glyph that's equal again. */
4069 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4072 x
+= desired_glyph
->pixel_width
;
4073 current_x
+= current_glyph
->pixel_width
;
4074 ++desired_glyph
, ++current_glyph
, ++i
;
4078 if (i
== start_hpos
|| x
!= current_x
)
4082 desired_glyph
= start
;
4086 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4087 rif
->write_glyphs (start
, i
- start_hpos
);
4092 /* Write the rest. */
4093 if (i
< desired_row
->used
[TEXT_AREA
])
4095 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4096 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4100 /* Maybe clear to end of line. */
4101 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4103 /* If new row extends to the end of the text area, nothing
4104 has to be cleared, if and only if we did a write_glyphs
4105 above. This is made sure by setting desired_stop_pos
4106 appropriately above. */
4107 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4109 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4111 /* If old row extends to the end of the text area, clear. */
4112 if (i
>= desired_row
->used
[TEXT_AREA
])
4113 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4114 desired_row
->x
+ desired_row
->pixel_width
);
4115 rif
->clear_end_of_line (-1);
4118 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4120 /* Otherwise clear to the end of the old row. Everything
4121 after that position should be clear already. */
4124 if (i
>= desired_row
->used
[TEXT_AREA
])
4125 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4126 desired_row
->x
+ desired_row
->pixel_width
);
4128 /* If cursor is displayed at the end of the line, make sure
4129 it's cleared. Nowadays we don't have a phys_cursor_glyph
4130 with which to erase the cursor (because this method
4131 doesn't work with lbearing/rbearing), so we must do it
4133 if (vpos
== w
->phys_cursor
.vpos
4134 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4136 w
->phys_cursor_on_p
= 0;
4140 x
= current_row
->x
+ current_row
->pixel_width
;
4141 rif
->clear_end_of_line (x
);
4150 /* Update row VPOS in window W. Value is non-zero if display has been
4154 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4156 int vpos
, *mouse_face_overwritten_p
;
4158 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4159 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4162 /* Set the row being updated. This is important to let xterm.c
4163 know what line height values are in effect. */
4164 updated_row
= desired_row
;
4166 /* A row can be completely invisible in case a desired matrix was
4167 built with a vscroll and then make_cursor_line_fully_visible shifts
4168 the matrix. Make sure to make such rows current anyway, since
4169 we need the correct y-position, for example, in the current matrix. */
4170 if (desired_row
->mode_line_p
4171 || desired_row
->visible_height
> 0)
4173 xassert (desired_row
->enabled_p
);
4175 /* Update display of the left margin area, if there is one. */
4176 if (!desired_row
->full_width_p
4177 && !NILP (w
->left_margin_width
))
4180 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4183 /* Update the display of the text area. */
4184 if (update_text_area (w
, vpos
))
4187 if (current_row
->mouse_face_p
)
4188 *mouse_face_overwritten_p
= 1;
4191 /* Update display of the right margin area, if there is one. */
4192 if (!desired_row
->full_width_p
4193 && !NILP (w
->right_margin_width
))
4196 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4199 /* Draw truncation marks etc. */
4200 if (!current_row
->enabled_p
4201 || desired_row
->y
!= current_row
->y
4202 || desired_row
->visible_height
!= current_row
->visible_height
4203 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4204 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4205 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4206 || desired_row
->continued_p
!= current_row
->continued_p
4207 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4208 || (desired_row
->indicate_empty_line_p
4209 != current_row
->indicate_empty_line_p
)
4210 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4211 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4212 rif
->after_update_window_line_hook (desired_row
);
4215 /* Update current_row from desired_row. */
4216 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4222 /* Set the cursor after an update of window W. This function may only
4223 be called from update_window. */
4226 set_window_cursor_after_update (w
)
4229 struct frame
*f
= XFRAME (w
->frame
);
4230 int cx
, cy
, vpos
, hpos
;
4232 /* Not intended for frame matrix updates. */
4233 xassert (FRAME_WINDOW_P (f
));
4235 if (cursor_in_echo_area
4236 && !NILP (echo_area_buffer
[0])
4237 /* If we are showing a message instead of the mini-buffer,
4238 show the cursor for the message instead. */
4239 && XWINDOW (minibuf_window
) == w
4240 && EQ (minibuf_window
, echo_area_window
)
4241 /* These cases apply only to the frame that contains
4242 the active mini-buffer window. */
4243 && FRAME_HAS_MINIBUF_P (f
)
4244 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4246 cx
= cy
= vpos
= hpos
= 0;
4248 if (cursor_in_echo_area
>= 0)
4250 /* If the mini-buffer is several lines high, find the last
4251 line that has any text on it. Note: either all lines
4252 are enabled or none. Otherwise we wouldn't be able to
4254 struct glyph_row
*row
, *last_row
;
4255 struct glyph
*glyph
;
4256 int yb
= window_text_bottom_y (w
);
4259 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4263 if (row
->used
[TEXT_AREA
]
4264 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4267 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4273 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4274 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4276 while (last
> start
&& last
->charpos
< 0)
4279 for (glyph
= start
; glyph
< last
; ++glyph
)
4281 cx
+= glyph
->pixel_width
;
4286 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4294 hpos
= w
->cursor
.hpos
;
4295 vpos
= w
->cursor
.vpos
;
4298 /* Window cursor can be out of sync for horizontally split windows. */
4299 hpos
= max (0, hpos
);
4300 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4301 vpos
= max (0, vpos
);
4302 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4303 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4307 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4308 tree rooted at W. */
4311 set_window_update_flags (w
, on_p
)
4317 if (!NILP (w
->hchild
))
4318 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4319 else if (!NILP (w
->vchild
))
4320 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4322 w
->must_be_updated_p
= on_p
;
4324 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4330 /***********************************************************************
4331 Window-Based Scrolling
4332 ***********************************************************************/
4334 /* Structure describing rows in scrolling_window. */
4338 /* Number of occurrences of this row in desired and current matrix. */
4339 int old_uses
, new_uses
;
4341 /* Vpos of row in new matrix. */
4342 int new_line_number
;
4344 /* Bucket index of this row_entry in the hash table row_table. */
4347 /* The row described by this entry. */
4348 struct glyph_row
*row
;
4350 /* Hash collision chain. */
4351 struct row_entry
*next
;
4354 /* A pool to allocate row_entry structures from, and the size of the
4355 pool. The pool is reallocated in scrolling_window when we find
4356 that we need a larger one. */
4358 static struct row_entry
*row_entry_pool
;
4359 static int row_entry_pool_size
;
4361 /* Index of next free entry in row_entry_pool. */
4363 static int row_entry_idx
;
4365 /* The hash table used during scrolling, and the table's size. This
4366 table is used to quickly identify equal rows in the desired and
4369 static struct row_entry
**row_table
;
4370 static int row_table_size
;
4372 /* Vectors of pointers to row_entry structures belonging to the
4373 current and desired matrix, and the size of the vectors. */
4375 static struct row_entry
**old_lines
, **new_lines
;
4376 static int old_lines_size
, new_lines_size
;
4378 /* A pool to allocate run structures from, and its size. */
4380 static struct run
*run_pool
;
4381 static int runs_size
;
4383 /* A vector of runs of lines found during scrolling. */
4385 static struct run
**runs
;
4387 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4388 struct glyph_row
*));
4391 /* Add glyph row ROW to the scrolling hash table during the scrolling
4394 static INLINE
struct row_entry
*
4395 add_row_entry (w
, row
)
4397 struct glyph_row
*row
;
4399 struct row_entry
*entry
;
4400 int i
= row
->hash
% row_table_size
;
4402 entry
= row_table
[i
];
4403 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4404 entry
= entry
->next
;
4408 entry
= row_entry_pool
+ row_entry_idx
++;
4410 entry
->old_uses
= entry
->new_uses
= 0;
4411 entry
->new_line_number
= 0;
4413 entry
->next
= row_table
[i
];
4414 row_table
[i
] = entry
;
4421 /* Try to reuse part of the current display of W by scrolling lines.
4422 HEADER_LINE_P non-zero means W has a top mode line.
4424 The algorithm is taken from Communications of the ACM, Apr78 "A
4425 Technique for Isolating Differences Between Files." It should take
4428 A short outline of the steps of the algorithm
4430 1. Skip lines equal at the start and end of both matrices.
4432 2. Enter rows in the current and desired matrix into a symbol
4433 table, counting how often they appear in both matrices.
4435 3. Rows that appear exactly once in both matrices serve as anchors,
4436 i.e. we assume that such lines are likely to have been moved.
4438 4. Starting from anchor lines, extend regions to be scrolled both
4439 forward and backward.
4443 -1 if all rows were found to be equal.
4444 0 to indicate that we did not scroll the display, or
4445 1 if we did scroll. */
4448 scrolling_window (w
, header_line_p
)
4452 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4453 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4454 int yb
= window_text_bottom_y (w
);
4455 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4456 int nruns
, nbytes
, n
, run_idx
;
4457 struct row_entry
*entry
;
4459 /* Skip over rows equal at the start. */
4460 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4462 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4463 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4468 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4469 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4470 && row_equal_p (w
, c
, d
, 1))
4479 /* Give up if some rows in the desired matrix are not enabled. */
4480 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4483 first_old
= first_new
= i
;
4485 /* Set last_new to the index + 1 of the last enabled row in the
4488 while (i
< desired_matrix
->nrows
- 1
4489 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4490 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4493 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4498 /* Set last_old to the index + 1 of the last enabled row in the
4499 current matrix. We don't look at the enabled flag here because
4500 we plan to reuse part of the display even if other parts are
4503 while (i
< current_matrix
->nrows
- 1
4504 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
)) <= yb
)
4508 /* Skip over rows equal at the bottom. */
4511 while (i
- 1 > first_new
4512 && j
- 1 > first_old
4513 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4514 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4515 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4517 MATRIX_ROW (desired_matrix
, i
- 1),
4518 MATRIX_ROW (current_matrix
, j
- 1), 1))
4523 /* Nothing to do if all rows are equal. */
4524 if (last_new
== first_new
)
4527 /* Reallocate vectors, tables etc. if necessary. */
4529 if (current_matrix
->nrows
> old_lines_size
)
4531 old_lines_size
= current_matrix
->nrows
;
4532 nbytes
= old_lines_size
* sizeof *old_lines
;
4533 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4536 if (desired_matrix
->nrows
> new_lines_size
)
4538 new_lines_size
= desired_matrix
->nrows
;
4539 nbytes
= new_lines_size
* sizeof *new_lines
;
4540 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4543 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4544 if (3 * n
> row_table_size
)
4546 row_table_size
= next_almost_prime (3 * n
);
4547 nbytes
= row_table_size
* sizeof *row_table
;
4548 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4549 bzero (row_table
, nbytes
);
4552 if (n
> row_entry_pool_size
)
4554 row_entry_pool_size
= n
;
4555 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4556 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4559 if (desired_matrix
->nrows
> runs_size
)
4561 runs_size
= desired_matrix
->nrows
;
4562 nbytes
= runs_size
* sizeof *runs
;
4563 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4564 nbytes
= runs_size
* sizeof *run_pool
;
4565 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4568 nruns
= run_idx
= 0;
4571 /* Add rows from the current and desired matrix to the hash table
4572 row_hash_table to be able to find equal ones quickly. */
4574 for (i
= first_old
; i
< last_old
; ++i
)
4576 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4578 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4579 old_lines
[i
] = entry
;
4583 old_lines
[i
] = NULL
;
4586 for (i
= first_new
; i
< last_new
; ++i
)
4588 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4589 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4591 entry
->new_line_number
= i
;
4592 new_lines
[i
] = entry
;
4595 /* Identify moves based on lines that are unique and equal
4596 in both matrices. */
4597 for (i
= first_old
; i
< last_old
;)
4599 && old_lines
[i
]->old_uses
== 1
4600 && old_lines
[i
]->new_uses
== 1)
4603 int new_line
= old_lines
[i
]->new_line_number
;
4604 struct run
*run
= run_pool
+ run_idx
++;
4607 run
->current_vpos
= i
;
4608 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4609 run
->desired_vpos
= new_line
;
4610 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4612 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4614 /* Extend backward. */
4617 while (j
> first_old
4619 && old_lines
[j
] == new_lines
[k
])
4621 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4622 --run
->current_vpos
;
4623 --run
->desired_vpos
;
4626 run
->desired_y
-= h
;
4627 run
->current_y
-= h
;
4631 /* Extend forward. */
4636 && old_lines
[j
] == new_lines
[k
])
4638 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4644 /* Insert run into list of all runs. Order runs by copied
4645 pixel lines. Note that we record runs that don't have to
4646 be copied because they are already in place. This is done
4647 because we can avoid calling update_window_line in this
4649 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4651 for (k
= nruns
; k
>= j
; --k
)
4652 runs
[k
] = runs
[k
- 1];
4661 /* Do the moves. Do it in a way that we don't overwrite something
4662 we want to copy later on. This is not solvable in general
4663 because there is only one display and we don't have a way to
4664 exchange areas on this display. Example:
4666 +-----------+ +-----------+
4668 +-----------+ --> +-----------+
4670 +-----------+ +-----------+
4672 Instead, prefer bigger moves, and invalidate moves that would
4673 copy from where we copied to. */
4675 for (i
= 0; i
< nruns
; ++i
)
4676 if (runs
[i
]->nrows
> 0)
4678 struct run
*r
= runs
[i
];
4680 /* Copy on the display. */
4681 if (r
->current_y
!= r
->desired_y
)
4683 rif
->scroll_run_hook (w
, r
);
4685 /* Invalidate runs that copy from where we copied to. */
4686 for (j
= i
+ 1; j
< nruns
; ++j
)
4688 struct run
*p
= runs
[j
];
4690 if ((p
->current_y
>= r
->desired_y
4691 && p
->current_y
< r
->desired_y
+ r
->height
)
4692 || (p
->current_y
+ p
->height
>= r
->desired_y
4693 && (p
->current_y
+ p
->height
4694 < r
->desired_y
+ r
->height
)))
4699 /* Assign matrix rows. */
4700 for (j
= 0; j
< r
->nrows
; ++j
)
4702 struct glyph_row
*from
, *to
;
4703 int to_overlapped_p
;
4705 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4706 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4707 to_overlapped_p
= to
->overlapped_p
;
4708 assign_row (to
, from
);
4709 to
->enabled_p
= 1, from
->enabled_p
= 0;
4710 to
->overlapped_p
= to_overlapped_p
;
4714 /* Clear the hash table, for the next time. */
4715 for (i
= 0; i
< row_entry_idx
; ++i
)
4716 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4718 /* Value is non-zero to indicate that we scrolled the display. */
4724 /************************************************************************
4726 ************************************************************************/
4728 /* Update the desired frame matrix of frame F.
4730 FORCE_P non-zero means that the update should not be stopped by
4731 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4732 should not be tried.
4734 Value is non-zero if update was stopped due to pending input. */
4737 update_frame_1 (f
, force_p
, inhibit_id_p
)
4742 /* Frame matrices to work on. */
4743 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4744 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4747 int preempt_count
= baud_rate
/ 2400 + 1;
4748 extern int input_pending
;
4750 xassert (current_matrix
&& desired_matrix
);
4752 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4753 calculate_costs (f
);
4755 if (preempt_count
<= 0)
4758 if (redisplay_dont_pause
)
4760 else if (!force_p
&& detect_input_pending ())
4766 /* If we cannot insert/delete lines, it's no use trying it. */
4767 if (!line_ins_del_ok
)
4770 /* See if any of the desired lines are enabled; don't compute for
4771 i/d line if just want cursor motion. */
4772 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4773 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4776 /* Try doing i/d line, if not yet inhibited. */
4777 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4778 force_p
|= scrolling (f
);
4780 /* Update the individual lines as needed. Do bottom line first. */
4781 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4782 update_frame_line (f
, desired_matrix
->nrows
- 1);
4784 /* Now update the rest of the lines. */
4785 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4787 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4789 if (FRAME_TERMCAP_P (f
))
4791 /* Flush out every so many lines.
4792 Also flush out if likely to have more than 1k buffered
4793 otherwise. I'm told that some telnet connections get
4794 really screwed by more than 1k output at once. */
4795 int outq
= PENDING_OUTPUT_COUNT (stdout
);
4797 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4800 if (preempt_count
== 1)
4802 #ifdef EMACS_OUTQSIZE
4803 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4804 /* Probably not a tty. Ignore the error and reset
4805 * the outq count. */
4806 outq
= PENDING_OUTPUT_COUNT (stdout
);
4809 if (baud_rate
<= outq
&& baud_rate
> 0)
4810 sleep (outq
/ baud_rate
);
4815 if ((i
- 1) % preempt_count
== 0)
4816 detect_input_pending ();
4818 update_frame_line (f
, i
);
4822 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
4824 /* Now just clean up termcap drivers and set cursor, etc. */
4827 if ((cursor_in_echo_area
4828 /* If we are showing a message instead of the mini-buffer,
4829 show the cursor for the message instead of for the
4830 (now hidden) mini-buffer contents. */
4831 || (EQ (minibuf_window
, selected_window
)
4832 && EQ (minibuf_window
, echo_area_window
)
4833 && !NILP (echo_area_buffer
[0])))
4834 /* These cases apply only to the frame that contains
4835 the active mini-buffer window. */
4836 && FRAME_HAS_MINIBUF_P (f
)
4837 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4839 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
4842 if (cursor_in_echo_area
< 0)
4844 /* Negative value of cursor_in_echo_area means put
4845 cursor at beginning of line. */
4851 /* Positive value of cursor_in_echo_area means put
4852 cursor at the end of the prompt. If the mini-buffer
4853 is several lines high, find the last line that has
4855 row
= FRAME_HEIGHT (f
);
4861 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4863 /* Frame rows are filled up with spaces that
4864 must be ignored here. */
4865 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4867 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4868 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4871 && (last
- 1)->charpos
< 0)
4877 while (row
> top
&& col
== 0);
4879 /* Make sure COL is not out of range. */
4880 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4882 /* If we have another row, advance cursor into it. */
4883 if (row
< FRAME_HEIGHT (f
) - 1)
4885 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
4888 /* Otherwise move it back in range. */
4890 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4894 cursor_to (row
, col
);
4898 /* We have only one cursor on terminal frames. Use it to
4899 display the cursor of the selected window. */
4900 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4901 if (w
->cursor
.vpos
>= 0
4902 /* The cursor vpos may be temporarily out of bounds
4903 in the following situation: There is one window,
4904 with the cursor in the lower half of it. The window
4905 is split, and a message causes a redisplay before
4906 a new cursor position has been computed. */
4907 && w
->cursor
.vpos
< XFASTINT (w
->height
))
4909 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4910 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4912 if (INTEGERP (w
->left_margin_width
))
4913 x
+= XFASTINT (w
->left_margin_width
);
4915 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
4923 clear_desired_matrices (f
);
4928 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4932 struct frame
*frame
;
4934 int unchanged_at_top
, unchanged_at_bottom
;
4937 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4938 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4939 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4940 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4942 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
4943 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4944 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4946 if (!current_matrix
)
4949 /* Compute hash codes of all the lines. Also calculate number of
4950 changed lines, number of unchanged lines at the beginning, and
4951 number of unchanged lines at the end. */
4953 unchanged_at_top
= 0;
4954 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
4955 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
4957 /* Give up on this scrolling if some old lines are not enabled. */
4958 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4960 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4961 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4963 /* This line cannot be redrawn, so don't let scrolling mess it. */
4964 new_hash
[i
] = old_hash
[i
];
4965 #define INFINITY 1000000 /* Taken from scroll.c */
4966 draw_cost
[i
] = INFINITY
;
4970 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4971 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4974 if (old_hash
[i
] != new_hash
[i
])
4977 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
4979 else if (i
== unchanged_at_top
)
4981 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4984 /* If changed lines are few, don't allow preemption, don't scroll. */
4985 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
4986 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
4989 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
4990 - unchanged_at_bottom
);
4992 if (scroll_region_ok
)
4993 free_at_end_vpos
-= unchanged_at_bottom
;
4994 else if (memory_below_frame
)
4995 free_at_end_vpos
= -1;
4997 /* If large window, fast terminal and few lines in common between
4998 current frame and desired frame, don't bother with i/d calc. */
4999 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5001 10 * scrolling_max_lines_saved (unchanged_at_top
,
5002 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5003 old_hash
, new_hash
, draw_cost
)))
5006 if (window_size
< 2)
5009 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5010 draw_cost
+ unchanged_at_top
- 1,
5011 old_draw_cost
+ unchanged_at_top
- 1,
5012 old_hash
+ unchanged_at_top
- 1,
5013 new_hash
+ unchanged_at_top
- 1,
5014 free_at_end_vpos
- unchanged_at_top
);
5020 /* Count the number of blanks at the start of the vector of glyphs R
5021 which is LEN glyphs long. */
5024 count_blanks (r
, len
)
5030 for (i
= 0; i
< len
; ++i
)
5031 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5038 /* Count the number of glyphs in common at the start of the glyph
5039 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5040 of STR2. Value is the number of equal glyphs equal at the start. */
5043 count_match (str1
, end1
, str2
, end2
)
5044 struct glyph
*str1
, *end1
, *str2
, *end2
;
5046 struct glyph
*p1
= str1
;
5047 struct glyph
*p2
= str2
;
5051 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5058 /* Char insertion/deletion cost vector, from term.c */
5060 extern int *char_ins_del_vector
;
5061 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5064 /* Perform a frame-based update on line VPOS in frame FRAME. */
5067 update_frame_line (frame
, vpos
)
5068 register struct frame
*frame
;
5071 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5073 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5074 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5075 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5076 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5077 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5078 int must_write_whole_line_p
;
5079 int write_spaces_p
= must_write_spaces
;
5080 int colored_spaces_p
= (FACE_FROM_ID (frame
, DEFAULT_FACE_ID
)->background
5081 != FACE_TTY_DEFAULT_BG_COLOR
);
5083 if (colored_spaces_p
)
5086 if (desired_row
->inverse_p
5087 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5089 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5090 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5091 current_row
->enabled_p
= 0;
5094 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5096 /* Current row not enabled means it has unknown contents. We must
5097 write the whole desired line in that case. */
5098 must_write_whole_line_p
= !current_row
->enabled_p
;
5099 if (must_write_whole_line_p
)
5106 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5107 olen
= current_row
->used
[TEXT_AREA
];
5109 if (!current_row
->inverse_p
)
5111 /* Ignore trailing spaces, if we can. */
5112 if (!write_spaces_p
)
5113 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5118 /* For an inverse-video line, make sure it's filled with
5119 spaces all the way to the frame edge so that the reverse
5120 video extends all the way across. */
5121 while (olen
< FRAME_WIDTH (frame
) - 1)
5122 obody
[olen
++] = space_glyph
;
5126 current_row
->enabled_p
= 1;
5127 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5128 current_row
->inverse_p
= desired_row
->inverse_p
;
5130 /* If desired line is empty, just clear the line. */
5131 if (!desired_row
->enabled_p
)
5137 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5138 nlen
= desired_row
->used
[TEXT_AREA
];
5139 nend
= nbody
+ nlen
;
5141 /* If display line has unknown contents, write the whole line. */
5142 if (must_write_whole_line_p
)
5144 /* Ignore spaces at the end, if we can. */
5145 if (!write_spaces_p
)
5146 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5149 /* Write the contents of the desired line. */
5152 cursor_to (vpos
, 0);
5153 write_glyphs (nbody
, nlen
);
5156 /* Don't call clear_end_of_line if we already wrote the whole
5157 line. The cursor will not be at the right margin in that
5158 case but in the line below. */
5159 if (nlen
< FRAME_WINDOW_WIDTH (frame
))
5161 cursor_to (vpos
, nlen
);
5162 clear_end_of_line (FRAME_WINDOW_WIDTH (frame
));
5165 /* Make sure we are in the right row, otherwise cursor movement
5166 with cmgoto might use `ch' in the wrong row. */
5167 cursor_to (vpos
, 0);
5169 make_current (desired_matrix
, current_matrix
, vpos
);
5173 /* Pretend trailing spaces are not there at all,
5174 unless for one reason or another we must write all spaces. */
5175 if (!desired_row
->inverse_p
)
5177 if (!write_spaces_p
)
5178 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5183 /* For an inverse-video line, give it extra trailing spaces all
5184 the way to the frame edge so that the reverse video extends
5185 all the way across. */
5186 while (nlen
< FRAME_WIDTH (frame
) - 1)
5187 nbody
[nlen
++] = space_glyph
;
5190 /* If there's no i/d char, quickly do the best we can without it. */
5191 if (!char_ins_del_ok
)
5195 /* Find the first glyph in desired row that doesn't agree with
5196 a glyph in the current row, and write the rest from there on. */
5197 for (i
= 0; i
< nlen
; i
++)
5199 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5201 /* Find the end of the run of different glyphs. */
5205 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5206 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5209 /* Output this run of non-matching chars. */
5210 cursor_to (vpos
, i
);
5211 write_glyphs (nbody
+ i
, j
- i
);
5214 /* Now find the next non-match. */
5218 /* Clear the rest of the line, or the non-clear part of it. */
5221 cursor_to (vpos
, nlen
);
5222 clear_end_of_line (olen
);
5225 /* Make current row = desired row. */
5226 make_current (desired_matrix
, current_matrix
, vpos
);
5230 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5231 characters in a row. */
5235 /* If current line is blank, skip over initial spaces, if
5236 possible, and write the rest. */
5237 if (write_spaces_p
|| desired_row
->inverse_p
)
5240 nsp
= count_blanks (nbody
, nlen
);
5244 cursor_to (vpos
, nsp
);
5245 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5248 /* Exchange contents between current_frame and new_frame. */
5249 make_current (desired_matrix
, current_matrix
, vpos
);
5253 /* Compute number of leading blanks in old and new contents. */
5254 osp
= count_blanks (obody
, olen
);
5255 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5257 : count_blanks (nbody
, nlen
));
5259 /* Compute number of matching chars starting with first non-blank. */
5260 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5261 nbody
+ nsp
, nbody
+ nlen
);
5263 /* Spaces in new match implicit space past the end of old. */
5264 /* A bug causing this to be a no-op was fixed in 18.29. */
5265 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5268 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5272 /* Avoid doing insert/delete char
5273 just cause number of leading spaces differs
5274 when the following text does not match. */
5275 if (begmatch
== 0 && osp
!= nsp
)
5276 osp
= nsp
= min (osp
, nsp
);
5278 /* Find matching characters at end of line */
5281 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5283 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5288 endmatch
= obody
+ olen
- op1
;
5290 /* tem gets the distance to insert or delete.
5291 endmatch is how many characters we save by doing so.
5294 tem
= (nlen
- nsp
) - (olen
- osp
);
5296 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
5299 /* nsp - osp is the distance to insert or delete.
5300 If that is nonzero, begmatch is known to be nonzero also.
5301 begmatch + endmatch is how much we save by doing the ins/del.
5305 && (!char_ins_del_ok
5306 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
5310 osp
= nsp
= min (osp
, nsp
);
5313 /* Now go through the line, inserting, writing and
5314 deleting as appropriate. */
5318 cursor_to (vpos
, nsp
);
5319 delete_glyphs (osp
- nsp
);
5323 /* If going to delete chars later in line
5324 and insert earlier in the line,
5325 must delete first to avoid losing data in the insert */
5326 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5328 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5329 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5330 olen
= nlen
- (nsp
- osp
);
5332 cursor_to (vpos
, osp
);
5333 insert_glyphs (0, nsp
- osp
);
5337 tem
= nsp
+ begmatch
+ endmatch
;
5338 if (nlen
!= tem
|| olen
!= tem
)
5340 cursor_to (vpos
, nsp
+ begmatch
);
5341 if (!endmatch
|| nlen
== olen
)
5343 /* If new text being written reaches right margin,
5344 there is no need to do clear-to-eol at the end.
5345 (and it would not be safe, since cursor is not
5346 going to be "at the margin" after the text is done) */
5347 if (nlen
== FRAME_WINDOW_WIDTH (frame
))
5349 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5351 else if (nlen
> olen
)
5353 /* Here, we used to have the following simple code:
5354 ----------------------------------------
5355 write_glyphs (nbody + nsp + begmatch, olen - tem);
5356 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5357 ----------------------------------------
5358 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5359 is a padding glyph. */
5360 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5363 /* Calculate columns we can actually overwrite. */
5364 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
])) out
--;
5365 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5366 /* If we left columns to be overwritten, we must delete them. */
5367 del
= olen
- tem
- out
;
5368 if (del
> 0) delete_glyphs (del
);
5369 /* At last, we insert columns not yet written out. */
5370 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5373 else if (olen
> nlen
)
5375 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5376 delete_glyphs (olen
- nlen
);
5382 /* If any unerased characters remain after the new line, erase them. */
5385 cursor_to (vpos
, nlen
);
5386 clear_end_of_line (olen
);
5389 /* Exchange contents between current_frame and new_frame. */
5390 make_current (desired_matrix
, current_matrix
, vpos
);
5395 /***********************************************************************
5396 X/Y Position -> Buffer Position
5397 ***********************************************************************/
5399 /* Return the character position of the character at window relative
5400 pixel position (*X, *Y). *X and *Y are adjusted to character
5404 buffer_posn_from_coords (w
, x
, y
)
5409 struct buffer
*old_current_buffer
= current_buffer
;
5410 struct text_pos startp
;
5411 int left_area_width
;
5413 current_buffer
= XBUFFER (w
->buffer
);
5414 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5415 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5416 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5417 start_display (&it
, w
, startp
);
5419 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5420 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5421 MOVE_TO_X
| MOVE_TO_Y
);
5423 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5425 current_buffer
= old_current_buffer
;
5426 return IT_CHARPOS (it
);
5430 /* Value is the string under window-relative coordinates X/Y in the
5431 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5432 means look at the mode line. *CHARPOS is set to the position in
5433 the string returned. */
5436 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5438 int x
, y
, mode_line_p
;
5441 struct glyph_row
*row
;
5442 struct glyph
*glyph
, *end
;
5443 struct frame
*f
= XFRAME (w
->frame
);
5445 Lisp_Object string
= Qnil
;
5448 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5450 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5452 if (row
->mode_line_p
&& row
->enabled_p
)
5454 /* The mode lines are displayed over scroll bars and bitmap
5455 areas, and X is window-relative. Correct X by the scroll bar
5456 and bitmap area width. */
5457 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5458 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5459 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5461 /* Find the glyph under X. If we find one with a string object,
5462 it's the one we were looking for. */
5463 glyph
= row
->glyphs
[TEXT_AREA
];
5464 end
= glyph
+ row
->used
[TEXT_AREA
];
5465 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5466 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5468 string
= glyph
->object
;
5469 *charpos
= glyph
->charpos
;
5478 /***********************************************************************
5479 Changing Frame Sizes
5480 ***********************************************************************/
5485 window_change_signal (signalnum
) /* If we don't have an argument, */
5486 int signalnum
; /* some compilers complain in signal calls. */
5492 int old_errno
= errno
;
5494 get_frame_size (&width
, &height
);
5496 /* The frame size change obviously applies to a termcap-controlled
5497 frame. Find such a frame in the list, and assume it's the only
5498 one (since the redisplay code always writes to stdout, not a
5499 FILE * specified in the frame structure). Record the new size,
5500 but don't reallocate the data structures now. Let that be done
5501 later outside of the signal handler. */
5504 Lisp_Object tail
, frame
;
5506 FOR_EACH_FRAME (tail
, frame
)
5508 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5510 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5516 signal (SIGWINCH
, window_change_signal
);
5519 #endif /* SIGWINCH */
5522 /* Do any change in frame size that was requested by a signal. SAFE
5523 non-zero means this function is called from a place where it is
5524 safe to change frame sizes while a redisplay is in progress. */
5527 do_pending_window_change (safe
)
5530 /* If window_change_signal should have run before, run it now. */
5531 if (redisplaying_p
&& !safe
)
5534 while (delayed_size_change
)
5536 Lisp_Object tail
, frame
;
5538 delayed_size_change
= 0;
5540 FOR_EACH_FRAME (tail
, frame
)
5542 struct frame
*f
= XFRAME (frame
);
5544 int height
= FRAME_NEW_HEIGHT (f
);
5545 int width
= FRAME_NEW_WIDTH (f
);
5547 if (height
!= 0 || width
!= 0)
5548 change_frame_size (f
, height
, width
, 0, 0, safe
);
5554 /* Change the frame height and/or width. Values may be given as zero to
5555 indicate no change is to take place.
5557 If DELAY is non-zero, then assume we're being called from a signal
5558 handler, and queue the change for later - perhaps the next
5559 redisplay. Since this tries to resize windows, we can't call it
5560 from a signal handler.
5562 SAFE non-zero means this function is called from a place where it's
5563 safe to change frame sizes while a redisplay is in progress. */
5566 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5567 register struct frame
*f
;
5568 int newheight
, newwidth
, pretend
, delay
, safe
;
5570 Lisp_Object tail
, frame
;
5572 if (! FRAME_WINDOW_P (f
))
5574 /* When using termcap, or on MS-DOS, all frames use
5575 the same screen, so a change in size affects all frames. */
5576 FOR_EACH_FRAME (tail
, frame
)
5577 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5578 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5579 pretend
, delay
, safe
);
5582 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5586 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5587 register struct frame
*f
;
5588 int newheight
, newwidth
, pretend
, delay
, safe
;
5590 int new_frame_window_width
;
5591 int count
= specpdl_ptr
- specpdl
;
5593 /* If we can't deal with the change now, queue it for later. */
5594 if (delay
|| (redisplaying_p
&& !safe
))
5596 FRAME_NEW_HEIGHT (f
) = newheight
;
5597 FRAME_NEW_WIDTH (f
) = newwidth
;
5598 delayed_size_change
= 1;
5602 /* This size-change overrides any pending one for this frame. */
5603 FRAME_NEW_HEIGHT (f
) = 0;
5604 FRAME_NEW_WIDTH (f
) = 0;
5606 /* If an argument is zero, set it to the current value. */
5608 newheight
= FRAME_HEIGHT (f
);
5610 newwidth
= FRAME_WIDTH (f
);
5612 /* Compute width of windows in F.
5613 This is the width of the frame without vertical scroll bars. */
5614 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5616 /* Round up to the smallest acceptable size. */
5617 check_frame_size (f
, &newheight
, &newwidth
);
5619 /* If we're not changing the frame size, quit now. */
5620 if (newheight
== FRAME_HEIGHT (f
)
5621 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5627 /* We only can set screen dimensions to certain values supported
5628 by our video hardware. Try to find the smallest size greater
5629 or equal to the requested dimensions. */
5630 dos_set_window_size (&newheight
, &newwidth
);
5633 if (newheight
!= FRAME_HEIGHT (f
))
5635 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5637 /* Frame has both root and mini-buffer. */
5638 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5639 FRAME_TOP_MARGIN (f
));
5640 set_window_height (FRAME_ROOT_WINDOW (f
),
5643 - FRAME_TOP_MARGIN (f
)),
5645 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5647 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5650 /* Frame has just one top-level window. */
5651 set_window_height (FRAME_ROOT_WINDOW (f
),
5652 newheight
- FRAME_TOP_MARGIN (f
), 0);
5654 if (FRAME_TERMCAP_P (f
) && !pretend
)
5655 FrameRows
= newheight
;
5658 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5660 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5661 if (FRAME_HAS_MINIBUF_P (f
))
5662 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5664 if (FRAME_TERMCAP_P (f
) && !pretend
)
5665 FrameCols
= newwidth
;
5667 if (WINDOWP (f
->tool_bar_window
))
5668 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5671 FRAME_HEIGHT (f
) = newheight
;
5672 SET_FRAME_WIDTH (f
, newwidth
);
5675 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5676 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5678 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5680 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5681 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5682 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5683 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5687 SET_FRAME_GARBAGED (f
);
5688 calculate_costs (f
);
5692 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5694 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5695 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5696 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5698 unbind_to (count
, Qnil
);
5703 /***********************************************************************
5704 Terminal Related Lisp Functions
5705 ***********************************************************************/
5707 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5708 1, 1, "FOpen termscript file: ",
5709 "Start writing all terminal output to FILE as well as the terminal.\n\
5710 FILE = nil means just close any termscript file currently open.")
5714 if (termscript
!= 0) fclose (termscript
);
5719 file
= Fexpand_file_name (file
, Qnil
);
5720 termscript
= fopen (XSTRING (file
)->data
, "w");
5721 if (termscript
== 0)
5722 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5728 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5729 Ssend_string_to_terminal
, 1, 1, 0,
5730 "Send STRING to the terminal without alteration.\n\
5731 Control characters in STRING will have terminal-dependent effects.")
5735 /* ??? Perhaps we should do something special for multibyte strings here. */
5736 CHECK_STRING (string
, 0);
5737 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
5741 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
5743 fflush (termscript
);
5749 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5750 "Beep, or flash the screen.\n\
5751 Also, unless an argument is given,\n\
5752 terminate any keyboard macro currently executing.")
5775 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5776 error ("Keyboard macro terminated by a command ringing the bell");
5784 /***********************************************************************
5786 ***********************************************************************/
5788 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5789 "Pause, without updating display, for SECONDS seconds.\n\
5790 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5791 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5792 additional wait period, in milliseconds; this may be useful if your\n\
5793 Emacs was built without floating point support.\n\
5794 \(Not all operating systems support waiting for a fraction of a second.)")
5795 (seconds
, milliseconds
)
5796 Lisp_Object seconds
, milliseconds
;
5800 if (NILP (milliseconds
))
5801 XSETINT (milliseconds
, 0);
5803 CHECK_NUMBER (milliseconds
, 1);
5804 usec
= XINT (milliseconds
) * 1000;
5807 double duration
= extract_float (seconds
);
5808 sec
= (int) duration
;
5809 usec
+= (duration
- sec
) * 1000000;
5812 #ifndef EMACS_HAS_USECS
5813 if (sec
== 0 && usec
!= 0)
5814 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5817 /* Assure that 0 <= usec < 1000000. */
5820 /* We can't rely on the rounding being correct if user is negative. */
5821 if (-1000000 < usec
)
5822 sec
--, usec
+= 1000000;
5824 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
5827 sec
+= usec
/ 1000000, usec
%= 1000000;
5829 if (sec
< 0 || (sec
== 0 && usec
== 0))
5835 XSETFASTINT (zero
, 0);
5836 wait_reading_process_input (sec
, usec
, zero
, 0);
5839 /* We should always have wait_reading_process_input; we have a dummy
5840 implementation for systems which don't support subprocesses. */
5842 /* No wait_reading_process_input */
5849 /* The reason this is done this way
5850 (rather than defined (H_S) && defined (H_T))
5851 is because the VMS preprocessor doesn't grok `defined' */
5853 EMACS_GET_TIME (end_time
);
5854 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
5855 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
5859 EMACS_GET_TIME (timeout
);
5860 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
5861 if (EMACS_TIME_NEG_P (timeout
)
5862 || !select (1, 0, 0, 0, &timeout
))
5865 #else /* not HAVE_SELECT */
5867 #endif /* HAVE_SELECT */
5868 #endif /* not VMS */
5871 #endif /* no subprocesses */
5877 /* This is just like wait_reading_process_input, except that
5878 it does the redisplay.
5880 It's also much like Fsit_for, except that it can be used for
5881 waiting for input as well. */
5884 sit_for (sec
, usec
, reading
, display
, initial_display
)
5885 int sec
, usec
, reading
, display
, initial_display
;
5887 Lisp_Object read_kbd
;
5889 swallow_events (display
);
5891 if (detect_input_pending_run_timers (display
))
5894 if (initial_display
)
5895 redisplay_preserve_echo_area ();
5897 if (sec
== 0 && usec
== 0)
5904 XSETINT (read_kbd
, reading
? -1 : 1);
5905 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
5907 return detect_input_pending () ? Qnil
: Qt
;
5911 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
5912 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
5913 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5914 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5915 additional wait period, in milliseconds; this may be useful if your\n\
5916 Emacs was built without floating point support.\n\
5917 \(Not all operating systems support waiting for a fraction of a second.)\n\
5918 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
5919 Redisplay is preempted as always if input arrives, and does not happen\n\
5920 if input is available before it starts.\n\
5921 Value is t if waited the full time with no input arriving.")
5922 (seconds
, milliseconds
, nodisp
)
5923 Lisp_Object seconds
, milliseconds
, nodisp
;
5927 if (NILP (milliseconds
))
5928 XSETINT (milliseconds
, 0);
5930 CHECK_NUMBER (milliseconds
, 1);
5931 usec
= XINT (milliseconds
) * 1000;
5934 double duration
= extract_float (seconds
);
5935 sec
= (int) duration
;
5936 usec
+= (duration
- sec
) * 1000000;
5939 #ifndef EMACS_HAS_USECS
5940 if (usec
!= 0 && sec
== 0)
5941 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
5944 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
5949 /***********************************************************************
5950 Other Lisp Functions
5951 ***********************************************************************/
5953 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
5954 session's frames, frame names, buffers, buffer-read-only flags, and
5955 buffer-modified-flags, and a trailing sentinel (so we don't need to
5956 add length checks). */
5958 static Lisp_Object frame_and_buffer_state
;
5961 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
5962 Sframe_or_buffer_changed_p
, 0, 0, 0,
5963 "Return non-nil if the frame and buffer state appears to have changed.\n\
5964 The state variable is an internal vector containing all frames and buffers,\n\
5965 aside from buffers whose names start with space,\n\
5966 along with the buffers' read-only and modified flags, which allows a fast\n\
5967 check to see whether the menu bars might need to be recomputed.\n\
5968 If this function returns non-nil, it updates the internal vector to reflect\n\
5969 the current state.\n")
5972 Lisp_Object tail
, frame
, buf
;
5976 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
5977 FOR_EACH_FRAME (tail
, frame
)
5979 if (!EQ (*vecp
++, frame
))
5981 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
5984 /* Check that the buffer info matches.
5985 No need to test for the end of the vector
5986 because the last element of the vector is lambda
5987 and that will always cause a mismatch. */
5988 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
5990 buf
= XCDR (XCAR (tail
));
5991 /* Ignore buffers that aren't included in buffer lists. */
5992 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
5994 if (!EQ (*vecp
++, buf
))
5996 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
5998 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6001 /* Detect deletion of a buffer at the end of the list. */
6002 if (EQ (*vecp
, Qlambda
))
6005 /* Start with 1 so there is room for at least one lambda at the end. */
6007 FOR_EACH_FRAME (tail
, frame
)
6009 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6011 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6012 if (n
> XVECTOR (frame_and_buffer_state
)->size
6013 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6014 /* Add 20 extra so we grow it less often. */
6015 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6016 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6017 FOR_EACH_FRAME (tail
, frame
)
6020 *vecp
++ = XFRAME (frame
)->name
;
6022 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6024 buf
= XCDR (XCAR (tail
));
6025 /* Ignore buffers that aren't included in buffer lists. */
6026 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6029 *vecp
++ = XBUFFER (buf
)->read_only
;
6030 *vecp
++ = Fbuffer_modified_p (buf
);
6032 /* Fill up the vector with lambdas (always at least one). */
6034 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6035 < XVECTOR (frame_and_buffer_state
)->size
)
6037 /* Make sure we didn't overflow the vector. */
6038 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6039 > XVECTOR (frame_and_buffer_state
)->size
)
6046 /***********************************************************************
6048 ***********************************************************************/
6050 char *terminal_type
;
6052 /* Initialization done when Emacs fork is started, before doing stty.
6053 Determine terminal type and set terminal_driver. Then invoke its
6054 decoding routine to set up variables in the terminal package. */
6059 #ifdef HAVE_X_WINDOWS
6060 extern int display_arg
;
6063 /* Construct the space glyph. */
6064 space_glyph
.type
= CHAR_GLYPH
;
6065 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6066 space_glyph
.charpos
= -1;
6070 cursor_in_echo_area
= 0;
6071 terminal_type
= (char *) 0;
6073 /* Now is the time to initialize this; it's used by init_sys_modes
6075 Vwindow_system
= Qnil
;
6077 /* If the user wants to use a window system, we shouldn't bother
6078 initializing the terminal. This is especially important when the
6079 terminal is so dumb that emacs gives up before and doesn't bother
6080 using the window system.
6082 If the DISPLAY environment variable is set and nonempty,
6083 try to use X, and die with an error message if that doesn't work. */
6085 #ifdef HAVE_X_WINDOWS
6090 display
= getenv ("DECW$DISPLAY");
6092 display
= getenv ("DISPLAY");
6095 display_arg
= (display
!= 0 && *display
!= 0);
6098 if (!inhibit_window_system
&& display_arg
6104 Vwindow_system
= intern ("x");
6106 Vwindow_system_version
= make_number (11);
6108 Vwindow_system_version
= make_number (10);
6110 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6111 /* In some versions of ncurses,
6112 tputs crashes if we have not called tgetent.
6114 { char b
[2044]; tgetent (b
, "xterm");}
6116 adjust_frame_glyphs_initially ();
6119 #endif /* HAVE_X_WINDOWS */
6122 if (!inhibit_window_system
)
6124 Vwindow_system
= intern ("w32");
6125 Vwindow_system_version
= make_number (1);
6126 adjust_frame_glyphs_initially ();
6129 #endif /* HAVE_NTGUI */
6132 if (!inhibit_window_system
)
6134 Vwindow_system
= intern ("mac");
6135 Vwindow_system_version
= make_number (1);
6136 adjust_frame_glyphs_initially ();
6139 #endif /* macintosh */
6141 /* If no window system has been specified, try to use the terminal. */
6144 fatal ("standard input is not a tty");
6148 /* Look at the TERM variable */
6149 terminal_type
= (char *) getenv ("TERM");
6153 fprintf (stderr
, "Please specify your terminal type.\n\
6154 For types defined in VMS, use set term /device=TYPE.\n\
6155 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6156 \(The quotation marks are necessary since terminal types are lower case.)\n");
6158 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6164 /* VMS DCL tends to up-case things, so down-case term type.
6165 Hardly any uppercase letters in terminal types; should be none. */
6167 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6170 strcpy (new, terminal_type
);
6172 for (p
= new; *p
; p
++)
6176 terminal_type
= new;
6180 term_init (terminal_type
);
6183 struct frame
*sf
= SELECTED_FRAME ();
6184 int width
= FRAME_WINDOW_WIDTH (sf
);
6185 int height
= FRAME_HEIGHT (sf
);
6187 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6189 /* If these sizes are so big they cause overflow, just ignore the
6190 change. It's not clear what better we could do. */
6191 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6192 fatal ("screen size %dx%d too big", width
, height
);
6195 adjust_frame_glyphs_initially ();
6196 calculate_costs (XFRAME (selected_frame
));
6201 #endif /* CANNOT_DUMP */
6202 signal (SIGWINCH
, window_change_signal
);
6203 #endif /* SIGWINCH */
6205 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6209 /* The MSDOS terminal turns on its ``window system'' relatively
6210 late into the startup, so we cannot do the frame faces'
6211 initialization just yet. It will be done later by pc-win.el
6212 and internal_terminal_init. */
6213 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6215 && NILP (Vwindow_system
))
6217 /* For the initial frame, we don't have any way of knowing what
6218 are the foreground and background colors of the terminal. */
6219 struct frame
*sf
= SELECTED_FRAME();
6221 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6222 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6223 call0 (intern ("tty-set-up-initial-frame-faces"));
6229 /***********************************************************************
6231 ***********************************************************************/
6233 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6234 Sinternal_show_cursor
, 2, 2, 0,
6235 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6236 WINDOW nil means use the selected window. SHOW non-nil means\n\
6237 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6238 don't show a cursor.")
6240 Lisp_Object window
, show
;
6242 /* Don't change cursor state while redisplaying. This could confuse
6244 if (!redisplaying_p
)
6247 window
= selected_window
;
6249 CHECK_WINDOW (window
, 2);
6251 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6258 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6259 Sinternal_show_cursor_p
, 0, 1, 0,
6260 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6261 WINDOW nil or omitted means report on the selected window.")
6268 window
= selected_window
;
6270 CHECK_WINDOW (window
, 2);
6272 w
= XWINDOW (window
);
6273 return w
->cursor_off_p
? Qnil
: Qt
;
6277 /***********************************************************************
6279 ***********************************************************************/
6284 defsubr (&Sredraw_frame
);
6285 defsubr (&Sredraw_display
);
6286 defsubr (&Sframe_or_buffer_changed_p
);
6287 defsubr (&Sopen_termscript
);
6289 defsubr (&Ssit_for
);
6290 defsubr (&Ssleep_for
);
6291 defsubr (&Ssend_string_to_terminal
);
6292 defsubr (&Sinternal_show_cursor
);
6293 defsubr (&Sinternal_show_cursor_p
);
6295 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6296 staticpro (&frame_and_buffer_state
);
6298 Qdisplay_table
= intern ("display-table");
6299 staticpro (&Qdisplay_table
);
6300 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6301 staticpro (&Qredisplay_dont_pause
);
6303 DEFVAR_INT ("baud-rate", &baud_rate
,
6304 "*The output baud rate of the terminal.\n\
6305 On most systems, changing this value will affect the amount of padding\n\
6306 and the other strategic decisions made during redisplay.");
6308 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6309 "*Non-nil means invert the entire frame display.\n\
6310 This means everything is in inverse video which otherwise would not be.");
6312 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6313 "*Non-nil means try to flash the frame to represent a bell.");
6315 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6316 "*Non-nil means no need to redraw entire frame after suspending.\n\
6317 A non-nil value is useful if the terminal can automatically preserve\n\
6318 Emacs's frame display when you reenter Emacs.\n\
6319 It is up to you to set this variable if your terminal can do that.");
6321 DEFVAR_LISP ("window-system", &Vwindow_system
,
6322 "A symbol naming the window-system under which Emacs is running\n\
6323 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6325 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6326 "The version number of the window system in use.\n\
6327 For X windows, this is 10 or 11.");
6329 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6330 "Non-nil means put cursor in minibuffer, at end of any message there.");
6332 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6333 "Table defining how to output a glyph code to the frame.\n\
6334 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6335 Each element can be:\n\
6336 integer: a glyph code which this glyph is an alias for.\n\
6337 string: output this glyph using that string (not impl. in X windows).\n\
6338 nil: this glyph mod 256 is char code to output,\n\
6339 and this glyph / 256 is face code for X windows (see `face-id').");
6340 Vglyph_table
= Qnil
;
6342 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6343 "Display table to use for buffers that specify none.\n\
6344 See `buffer-display-table' for more information.");
6345 Vstandard_display_table
= Qnil
;
6347 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6348 "*Non-nil means update isn't paused when input is detected.");
6349 redisplay_dont_pause
= 0;
6351 /* Initialize `window-system', unless init_display already decided it. */
6356 Vwindow_system
= Qnil
;
6357 Vwindow_system_version
= Qnil
;