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
);
3999 int skip_equal_glyphs_p
= 1;
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 skip_equal_glyphs_p
= right
== 0;
4019 if (skip_equal_glyphs_p
)
4021 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4023 x
+= desired_glyph
->pixel_width
;
4024 ++desired_glyph
, ++current_glyph
, ++i
;
4027 /* Consider the case that the current row contains "xxx ppp
4028 ggg" in italic Courier font, and the desired row is "xxx
4029 ggg". The character `p' has lbearing, `g' has not. The
4030 loop above will stop in front of the first `p' in the
4031 current row. If we would start writing glyphs there, we
4032 wouldn't erase the lbearing of the `p'. The rest of the
4033 lbearing problem is then taken care of by x_draw_glyphs. */
4034 if (overlapping_glyphs_p
4036 && i
< current_row
->used
[TEXT_AREA
]
4037 && current_row
->used
[TEXT_AREA
] != desired_row
->used
[TEXT_AREA
])
4041 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4043 while (left
> 0 && i
> 0)
4045 --i
, --desired_glyph
, --current_glyph
;
4046 x
-= desired_glyph
->pixel_width
;
4047 left
-= desired_glyph
->pixel_width
;
4051 /* Try to avoid writing the entire rest of the desired row
4052 by looking for a resync point. This mainly prevents
4053 mode line flickering in the case the mode line is in
4054 fixed-pitch font, which it usually will be. */
4055 if (i
< desired_row
->used
[TEXT_AREA
])
4057 int start_x
= x
, start_hpos
= i
;
4058 struct glyph
*start
= desired_glyph
;
4061 /* Find the next glyph that's equal again. */
4063 && !GLYPH_EQUAL_P (desired_glyph
, current_glyph
)
4066 x
+= desired_glyph
->pixel_width
;
4067 current_x
+= current_glyph
->pixel_width
;
4068 ++desired_glyph
, ++current_glyph
, ++i
;
4071 if (i
== start_hpos
|| x
!= current_x
)
4075 desired_glyph
= start
;
4079 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4080 rif
->write_glyphs (start
, i
- start_hpos
);
4085 /* Write the rest. */
4086 if (i
< desired_row
->used
[TEXT_AREA
])
4088 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4089 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4093 /* Maybe clear to end of line. */
4094 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4096 /* If new row extends to the end of the text area, nothing
4097 has to be cleared, if and only if we did a write_glyphs
4098 above. This is made sure by setting desired_stop_pos
4099 appropriately above. */
4100 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4102 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4104 /* If old row extends to the end of the text area, clear. */
4105 if (i
>= desired_row
->used
[TEXT_AREA
])
4106 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4107 desired_row
->x
+ desired_row
->pixel_width
);
4108 rif
->clear_end_of_line (-1);
4111 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4113 /* Otherwise clear to the end of the old row. Everything
4114 after that position should be clear already. */
4117 if (i
>= desired_row
->used
[TEXT_AREA
])
4118 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4119 desired_row
->x
+ desired_row
->pixel_width
);
4121 /* If cursor is displayed at the end of the line, make sure
4122 it's cleared. Nowadays we don't have a phys_cursor_glyph
4123 with which to erase the cursor (because this method
4124 doesn't work with lbearing/rbearing), so we must do it
4126 if (vpos
== w
->phys_cursor
.vpos
4127 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4129 w
->phys_cursor_on_p
= 0;
4133 x
= current_row
->x
+ current_row
->pixel_width
;
4134 rif
->clear_end_of_line (x
);
4143 /* Update row VPOS in window W. Value is non-zero if display has been
4147 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4149 int vpos
, *mouse_face_overwritten_p
;
4151 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4152 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4155 /* Set the row being updated. This is important to let xterm.c
4156 know what line height values are in effect. */
4157 updated_row
= desired_row
;
4159 /* A row can be completely invisible in case a desired matrix was
4160 built with a vscroll and then make_cursor_line_fully_visible shifts
4161 the matrix. Make sure to make such rows current anyway, since
4162 we need the correct y-position, for example, in the current matrix. */
4163 if (desired_row
->mode_line_p
4164 || desired_row
->visible_height
> 0)
4166 xassert (desired_row
->enabled_p
);
4168 /* Update display of the left margin area, if there is one. */
4169 if (!desired_row
->full_width_p
4170 && !NILP (w
->left_margin_width
))
4173 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4176 /* Update the display of the text area. */
4177 if (update_text_area (w
, vpos
))
4180 if (current_row
->mouse_face_p
)
4181 *mouse_face_overwritten_p
= 1;
4184 /* Update display of the right margin area, if there is one. */
4185 if (!desired_row
->full_width_p
4186 && !NILP (w
->right_margin_width
))
4189 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4192 /* Draw truncation marks etc. */
4193 if (!current_row
->enabled_p
4194 || desired_row
->y
!= current_row
->y
4195 || desired_row
->visible_height
!= current_row
->visible_height
4196 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4197 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4198 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4199 || desired_row
->continued_p
!= current_row
->continued_p
4200 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4201 || (desired_row
->indicate_empty_line_p
4202 != current_row
->indicate_empty_line_p
)
4203 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4204 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4205 rif
->after_update_window_line_hook (desired_row
);
4208 /* Update current_row from desired_row. */
4209 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4215 /* Set the cursor after an update of window W. This function may only
4216 be called from update_window. */
4219 set_window_cursor_after_update (w
)
4222 struct frame
*f
= XFRAME (w
->frame
);
4223 int cx
, cy
, vpos
, hpos
;
4225 /* Not intended for frame matrix updates. */
4226 xassert (FRAME_WINDOW_P (f
));
4228 if (cursor_in_echo_area
4229 && !NILP (echo_area_buffer
[0])
4230 /* If we are showing a message instead of the mini-buffer,
4231 show the cursor for the message instead. */
4232 && XWINDOW (minibuf_window
) == w
4233 && EQ (minibuf_window
, echo_area_window
)
4234 /* These cases apply only to the frame that contains
4235 the active mini-buffer window. */
4236 && FRAME_HAS_MINIBUF_P (f
)
4237 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4239 cx
= cy
= vpos
= hpos
= 0;
4241 if (cursor_in_echo_area
>= 0)
4243 /* If the mini-buffer is several lines high, find the last
4244 line that has any text on it. Note: either all lines
4245 are enabled or none. Otherwise we wouldn't be able to
4247 struct glyph_row
*row
, *last_row
;
4248 struct glyph
*glyph
;
4249 int yb
= window_text_bottom_y (w
);
4252 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4256 if (row
->used
[TEXT_AREA
]
4257 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4260 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4266 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4267 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4269 while (last
> start
&& last
->charpos
< 0)
4272 for (glyph
= start
; glyph
< last
; ++glyph
)
4274 cx
+= glyph
->pixel_width
;
4279 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4287 hpos
= w
->cursor
.hpos
;
4288 vpos
= w
->cursor
.vpos
;
4291 /* Window cursor can be out of sync for horizontally split windows. */
4292 hpos
= max (0, hpos
);
4293 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4294 vpos
= max (0, vpos
);
4295 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4296 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4300 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4301 tree rooted at W. */
4304 set_window_update_flags (w
, on_p
)
4310 if (!NILP (w
->hchild
))
4311 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4312 else if (!NILP (w
->vchild
))
4313 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4315 w
->must_be_updated_p
= on_p
;
4317 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4323 /***********************************************************************
4324 Window-Based Scrolling
4325 ***********************************************************************/
4327 /* Structure describing rows in scrolling_window. */
4331 /* Number of occurrences of this row in desired and current matrix. */
4332 int old_uses
, new_uses
;
4334 /* Vpos of row in new matrix. */
4335 int new_line_number
;
4337 /* Bucket index of this row_entry in the hash table row_table. */
4340 /* The row described by this entry. */
4341 struct glyph_row
*row
;
4343 /* Hash collision chain. */
4344 struct row_entry
*next
;
4347 /* A pool to allocate row_entry structures from, and the size of the
4348 pool. The pool is reallocated in scrolling_window when we find
4349 that we need a larger one. */
4351 static struct row_entry
*row_entry_pool
;
4352 static int row_entry_pool_size
;
4354 /* Index of next free entry in row_entry_pool. */
4356 static int row_entry_idx
;
4358 /* The hash table used during scrolling, and the table's size. This
4359 table is used to quickly identify equal rows in the desired and
4362 static struct row_entry
**row_table
;
4363 static int row_table_size
;
4365 /* Vectors of pointers to row_entry structures belonging to the
4366 current and desired matrix, and the size of the vectors. */
4368 static struct row_entry
**old_lines
, **new_lines
;
4369 static int old_lines_size
, new_lines_size
;
4371 /* A pool to allocate run structures from, and its size. */
4373 static struct run
*run_pool
;
4374 static int runs_size
;
4376 /* A vector of runs of lines found during scrolling. */
4378 static struct run
**runs
;
4380 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4381 struct glyph_row
*));
4384 /* Add glyph row ROW to the scrolling hash table during the scrolling
4387 static INLINE
struct row_entry
*
4388 add_row_entry (w
, row
)
4390 struct glyph_row
*row
;
4392 struct row_entry
*entry
;
4393 int i
= row
->hash
% row_table_size
;
4395 entry
= row_table
[i
];
4396 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4397 entry
= entry
->next
;
4401 entry
= row_entry_pool
+ row_entry_idx
++;
4403 entry
->old_uses
= entry
->new_uses
= 0;
4404 entry
->new_line_number
= 0;
4406 entry
->next
= row_table
[i
];
4407 row_table
[i
] = entry
;
4414 /* Try to reuse part of the current display of W by scrolling lines.
4415 HEADER_LINE_P non-zero means W has a top mode line.
4417 The algorithm is taken from Communications of the ACM, Apr78 "A
4418 Technique for Isolating Differences Between Files." It should take
4421 A short outline of the steps of the algorithm
4423 1. Skip lines equal at the start and end of both matrices.
4425 2. Enter rows in the current and desired matrix into a symbol
4426 table, counting how often they appear in both matrices.
4428 3. Rows that appear exactly once in both matrices serve as anchors,
4429 i.e. we assume that such lines are likely to have been moved.
4431 4. Starting from anchor lines, extend regions to be scrolled both
4432 forward and backward.
4436 -1 if all rows were found to be equal.
4437 0 to indicate that we did not scroll the display, or
4438 1 if we did scroll. */
4441 scrolling_window (w
, header_line_p
)
4445 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4446 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4447 int yb
= window_text_bottom_y (w
);
4448 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4449 int nruns
, nbytes
, n
, run_idx
;
4450 struct row_entry
*entry
;
4452 /* Skip over rows equal at the start. */
4453 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4455 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4456 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4461 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4462 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4463 && row_equal_p (w
, c
, d
, 1))
4472 /* Give up if some rows in the desired matrix are not enabled. */
4473 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4476 first_old
= first_new
= i
;
4478 /* Set last_new to the index + 1 of the last enabled row in the
4481 while (i
< desired_matrix
->nrows
- 1
4482 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4483 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4486 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4491 /* Set last_old to the index + 1 of the last enabled row in the
4492 current matrix. We don't look at the enabled flag here because
4493 we plan to reuse part of the display even if other parts are
4496 while (i
< current_matrix
->nrows
- 1
4497 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
)) <= yb
)
4501 /* Skip over rows equal at the bottom. */
4504 while (i
- 1 > first_new
4505 && j
- 1 > first_old
4506 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4507 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4508 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4510 MATRIX_ROW (desired_matrix
, i
- 1),
4511 MATRIX_ROW (current_matrix
, j
- 1), 1))
4516 /* Nothing to do if all rows are equal. */
4517 if (last_new
== first_new
)
4520 /* Reallocate vectors, tables etc. if necessary. */
4522 if (current_matrix
->nrows
> old_lines_size
)
4524 old_lines_size
= current_matrix
->nrows
;
4525 nbytes
= old_lines_size
* sizeof *old_lines
;
4526 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4529 if (desired_matrix
->nrows
> new_lines_size
)
4531 new_lines_size
= desired_matrix
->nrows
;
4532 nbytes
= new_lines_size
* sizeof *new_lines
;
4533 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4536 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4537 if (3 * n
> row_table_size
)
4539 row_table_size
= next_almost_prime (3 * n
);
4540 nbytes
= row_table_size
* sizeof *row_table
;
4541 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4542 bzero (row_table
, nbytes
);
4545 if (n
> row_entry_pool_size
)
4547 row_entry_pool_size
= n
;
4548 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4549 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4552 if (desired_matrix
->nrows
> runs_size
)
4554 runs_size
= desired_matrix
->nrows
;
4555 nbytes
= runs_size
* sizeof *runs
;
4556 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4557 nbytes
= runs_size
* sizeof *run_pool
;
4558 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4561 nruns
= run_idx
= 0;
4564 /* Add rows from the current and desired matrix to the hash table
4565 row_hash_table to be able to find equal ones quickly. */
4567 for (i
= first_old
; i
< last_old
; ++i
)
4569 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4571 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4572 old_lines
[i
] = entry
;
4576 old_lines
[i
] = NULL
;
4579 for (i
= first_new
; i
< last_new
; ++i
)
4581 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4582 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4584 entry
->new_line_number
= i
;
4585 new_lines
[i
] = entry
;
4588 /* Identify moves based on lines that are unique and equal
4589 in both matrices. */
4590 for (i
= first_old
; i
< last_old
;)
4592 && old_lines
[i
]->old_uses
== 1
4593 && old_lines
[i
]->new_uses
== 1)
4596 int new_line
= old_lines
[i
]->new_line_number
;
4597 struct run
*run
= run_pool
+ run_idx
++;
4600 run
->current_vpos
= i
;
4601 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4602 run
->desired_vpos
= new_line
;
4603 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4605 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4607 /* Extend backward. */
4610 while (j
> first_old
4612 && old_lines
[j
] == new_lines
[k
])
4614 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4615 --run
->current_vpos
;
4616 --run
->desired_vpos
;
4619 run
->desired_y
-= h
;
4620 run
->current_y
-= h
;
4624 /* Extend forward. */
4629 && old_lines
[j
] == new_lines
[k
])
4631 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4637 /* Insert run into list of all runs. Order runs by copied
4638 pixel lines. Note that we record runs that don't have to
4639 be copied because they are already in place. This is done
4640 because we can avoid calling update_window_line in this
4642 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4644 for (k
= nruns
; k
>= j
; --k
)
4645 runs
[k
] = runs
[k
- 1];
4654 /* Do the moves. Do it in a way that we don't overwrite something
4655 we want to copy later on. This is not solvable in general
4656 because there is only one display and we don't have a way to
4657 exchange areas on this display. Example:
4659 +-----------+ +-----------+
4661 +-----------+ --> +-----------+
4663 +-----------+ +-----------+
4665 Instead, prefer bigger moves, and invalidate moves that would
4666 copy from where we copied to. */
4668 for (i
= 0; i
< nruns
; ++i
)
4669 if (runs
[i
]->nrows
> 0)
4671 struct run
*r
= runs
[i
];
4673 /* Copy on the display. */
4674 if (r
->current_y
!= r
->desired_y
)
4676 rif
->scroll_run_hook (w
, r
);
4678 /* Invalidate runs that copy from where we copied to. */
4679 for (j
= i
+ 1; j
< nruns
; ++j
)
4681 struct run
*p
= runs
[j
];
4683 if ((p
->current_y
>= r
->desired_y
4684 && p
->current_y
< r
->desired_y
+ r
->height
)
4685 || (p
->current_y
+ p
->height
>= r
->desired_y
4686 && (p
->current_y
+ p
->height
4687 < r
->desired_y
+ r
->height
)))
4692 /* Assign matrix rows. */
4693 for (j
= 0; j
< r
->nrows
; ++j
)
4695 struct glyph_row
*from
, *to
;
4696 int to_overlapped_p
;
4698 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4699 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4700 to_overlapped_p
= to
->overlapped_p
;
4701 assign_row (to
, from
);
4702 to
->enabled_p
= 1, from
->enabled_p
= 0;
4703 to
->overlapped_p
= to_overlapped_p
;
4707 /* Clear the hash table, for the next time. */
4708 for (i
= 0; i
< row_entry_idx
; ++i
)
4709 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4711 /* Value is non-zero to indicate that we scrolled the display. */
4717 /************************************************************************
4719 ************************************************************************/
4721 /* Update the desired frame matrix of frame F.
4723 FORCE_P non-zero means that the update should not be stopped by
4724 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4725 should not be tried.
4727 Value is non-zero if update was stopped due to pending input. */
4730 update_frame_1 (f
, force_p
, inhibit_id_p
)
4735 /* Frame matrices to work on. */
4736 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4737 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4740 int preempt_count
= baud_rate
/ 2400 + 1;
4741 extern int input_pending
;
4743 xassert (current_matrix
&& desired_matrix
);
4745 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4746 calculate_costs (f
);
4748 if (preempt_count
<= 0)
4751 if (redisplay_dont_pause
)
4753 else if (!force_p
&& detect_input_pending ())
4759 /* If we cannot insert/delete lines, it's no use trying it. */
4760 if (!line_ins_del_ok
)
4763 /* See if any of the desired lines are enabled; don't compute for
4764 i/d line if just want cursor motion. */
4765 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4766 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4769 /* Try doing i/d line, if not yet inhibited. */
4770 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4771 force_p
|= scrolling (f
);
4773 /* Update the individual lines as needed. Do bottom line first. */
4774 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4775 update_frame_line (f
, desired_matrix
->nrows
- 1);
4777 /* Now update the rest of the lines. */
4778 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4780 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4782 if (FRAME_TERMCAP_P (f
))
4784 /* Flush out every so many lines.
4785 Also flush out if likely to have more than 1k buffered
4786 otherwise. I'm told that some telnet connections get
4787 really screwed by more than 1k output at once. */
4788 int outq
= PENDING_OUTPUT_COUNT (stdout
);
4790 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4793 if (preempt_count
== 1)
4795 #ifdef EMACS_OUTQSIZE
4796 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4797 /* Probably not a tty. Ignore the error and reset
4798 * the outq count. */
4799 outq
= PENDING_OUTPUT_COUNT (stdout
);
4802 if (baud_rate
<= outq
&& baud_rate
> 0)
4803 sleep (outq
/ baud_rate
);
4808 if ((i
- 1) % preempt_count
== 0)
4809 detect_input_pending ();
4811 update_frame_line (f
, i
);
4815 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
4817 /* Now just clean up termcap drivers and set cursor, etc. */
4820 if ((cursor_in_echo_area
4821 /* If we are showing a message instead of the mini-buffer,
4822 show the cursor for the message instead of for the
4823 (now hidden) mini-buffer contents. */
4824 || (EQ (minibuf_window
, selected_window
)
4825 && EQ (minibuf_window
, echo_area_window
)
4826 && !NILP (echo_area_buffer
[0])))
4827 /* These cases apply only to the frame that contains
4828 the active mini-buffer window. */
4829 && FRAME_HAS_MINIBUF_P (f
)
4830 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4832 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
4835 if (cursor_in_echo_area
< 0)
4837 /* Negative value of cursor_in_echo_area means put
4838 cursor at beginning of line. */
4844 /* Positive value of cursor_in_echo_area means put
4845 cursor at the end of the prompt. If the mini-buffer
4846 is several lines high, find the last line that has
4848 row
= FRAME_HEIGHT (f
);
4854 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4856 /* Frame rows are filled up with spaces that
4857 must be ignored here. */
4858 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4860 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4861 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4864 && (last
- 1)->charpos
< 0)
4870 while (row
> top
&& col
== 0);
4872 /* Make sure COL is not out of range. */
4873 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4875 /* If we have another row, advance cursor into it. */
4876 if (row
< FRAME_HEIGHT (f
) - 1)
4878 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
4881 /* Otherwise move it back in range. */
4883 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4887 cursor_to (row
, col
);
4891 /* We have only one cursor on terminal frames. Use it to
4892 display the cursor of the selected window. */
4893 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4894 if (w
->cursor
.vpos
>= 0
4895 /* The cursor vpos may be temporarily out of bounds
4896 in the following situation: There is one window,
4897 with the cursor in the lower half of it. The window
4898 is split, and a message causes a redisplay before
4899 a new cursor position has been computed. */
4900 && w
->cursor
.vpos
< XFASTINT (w
->height
))
4902 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4903 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4905 if (INTEGERP (w
->left_margin_width
))
4906 x
+= XFASTINT (w
->left_margin_width
);
4908 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
4916 clear_desired_matrices (f
);
4921 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4925 struct frame
*frame
;
4927 int unchanged_at_top
, unchanged_at_bottom
;
4930 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4931 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4932 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4933 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4935 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
4936 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4937 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4939 if (!current_matrix
)
4942 /* Compute hash codes of all the lines. Also calculate number of
4943 changed lines, number of unchanged lines at the beginning, and
4944 number of unchanged lines at the end. */
4946 unchanged_at_top
= 0;
4947 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
4948 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
4950 /* Give up on this scrolling if some old lines are not enabled. */
4951 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4953 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4954 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4956 /* This line cannot be redrawn, so don't let scrolling mess it. */
4957 new_hash
[i
] = old_hash
[i
];
4958 #define INFINITY 1000000 /* Taken from scroll.c */
4959 draw_cost
[i
] = INFINITY
;
4963 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4964 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4967 if (old_hash
[i
] != new_hash
[i
])
4970 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
4972 else if (i
== unchanged_at_top
)
4974 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4977 /* If changed lines are few, don't allow preemption, don't scroll. */
4978 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
4979 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
4982 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
4983 - unchanged_at_bottom
);
4985 if (scroll_region_ok
)
4986 free_at_end_vpos
-= unchanged_at_bottom
;
4987 else if (memory_below_frame
)
4988 free_at_end_vpos
= -1;
4990 /* If large window, fast terminal and few lines in common between
4991 current frame and desired frame, don't bother with i/d calc. */
4992 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
4994 10 * scrolling_max_lines_saved (unchanged_at_top
,
4995 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
4996 old_hash
, new_hash
, draw_cost
)))
4999 if (window_size
< 2)
5002 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5003 draw_cost
+ unchanged_at_top
- 1,
5004 old_draw_cost
+ unchanged_at_top
- 1,
5005 old_hash
+ unchanged_at_top
- 1,
5006 new_hash
+ unchanged_at_top
- 1,
5007 free_at_end_vpos
- unchanged_at_top
);
5013 /* Count the number of blanks at the start of the vector of glyphs R
5014 which is LEN glyphs long. */
5017 count_blanks (r
, len
)
5023 for (i
= 0; i
< len
; ++i
)
5024 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5031 /* Count the number of glyphs in common at the start of the glyph
5032 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5033 of STR2. Value is the number of equal glyphs equal at the start. */
5036 count_match (str1
, end1
, str2
, end2
)
5037 struct glyph
*str1
, *end1
, *str2
, *end2
;
5039 struct glyph
*p1
= str1
;
5040 struct glyph
*p2
= str2
;
5044 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5051 /* Char insertion/deletion cost vector, from term.c */
5053 extern int *char_ins_del_vector
;
5054 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5057 /* Perform a frame-based update on line VPOS in frame FRAME. */
5060 update_frame_line (frame
, vpos
)
5061 register struct frame
*frame
;
5064 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5066 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5067 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5068 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5069 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5070 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5071 int must_write_whole_line_p
;
5072 int write_spaces_p
= must_write_spaces
;
5073 int colored_spaces_p
= (FACE_FROM_ID (frame
, DEFAULT_FACE_ID
)->background
5074 != FACE_TTY_DEFAULT_BG_COLOR
);
5076 if (colored_spaces_p
)
5079 if (desired_row
->inverse_p
5080 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5082 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5083 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5084 current_row
->enabled_p
= 0;
5087 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5089 /* Current row not enabled means it has unknown contents. We must
5090 write the whole desired line in that case. */
5091 must_write_whole_line_p
= !current_row
->enabled_p
;
5092 if (must_write_whole_line_p
)
5099 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5100 olen
= current_row
->used
[TEXT_AREA
];
5102 if (!current_row
->inverse_p
)
5104 /* Ignore trailing spaces, if we can. */
5105 if (!write_spaces_p
)
5106 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5111 /* For an inverse-video line, make sure it's filled with
5112 spaces all the way to the frame edge so that the reverse
5113 video extends all the way across. */
5114 while (olen
< FRAME_WIDTH (frame
) - 1)
5115 obody
[olen
++] = space_glyph
;
5119 current_row
->enabled_p
= 1;
5120 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5121 current_row
->inverse_p
= desired_row
->inverse_p
;
5123 /* If desired line is empty, just clear the line. */
5124 if (!desired_row
->enabled_p
)
5130 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5131 nlen
= desired_row
->used
[TEXT_AREA
];
5132 nend
= nbody
+ nlen
;
5134 /* If display line has unknown contents, write the whole line. */
5135 if (must_write_whole_line_p
)
5137 /* Ignore spaces at the end, if we can. */
5138 if (!write_spaces_p
)
5139 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5142 /* Write the contents of the desired line. */
5145 cursor_to (vpos
, 0);
5146 write_glyphs (nbody
, nlen
);
5149 /* Don't call clear_end_of_line if we already wrote the whole
5150 line. The cursor will not be at the right margin in that
5151 case but in the line below. */
5152 if (nlen
< FRAME_WINDOW_WIDTH (frame
))
5154 cursor_to (vpos
, nlen
);
5155 clear_end_of_line (FRAME_WINDOW_WIDTH (frame
));
5158 /* Make sure we are in the right row, otherwise cursor movement
5159 with cmgoto might use `ch' in the wrong row. */
5160 cursor_to (vpos
, 0);
5162 make_current (desired_matrix
, current_matrix
, vpos
);
5166 /* Pretend trailing spaces are not there at all,
5167 unless for one reason or another we must write all spaces. */
5168 if (!desired_row
->inverse_p
)
5170 if (!write_spaces_p
)
5171 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5176 /* For an inverse-video line, give it extra trailing spaces all
5177 the way to the frame edge so that the reverse video extends
5178 all the way across. */
5179 while (nlen
< FRAME_WIDTH (frame
) - 1)
5180 nbody
[nlen
++] = space_glyph
;
5183 /* If there's no i/d char, quickly do the best we can without it. */
5184 if (!char_ins_del_ok
)
5188 /* Find the first glyph in desired row that doesn't agree with
5189 a glyph in the current row, and write the rest from there on. */
5190 for (i
= 0; i
< nlen
; i
++)
5192 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5194 /* Find the end of the run of different glyphs. */
5198 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5199 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5202 /* Output this run of non-matching chars. */
5203 cursor_to (vpos
, i
);
5204 write_glyphs (nbody
+ i
, j
- i
);
5207 /* Now find the next non-match. */
5211 /* Clear the rest of the line, or the non-clear part of it. */
5214 cursor_to (vpos
, nlen
);
5215 clear_end_of_line (olen
);
5218 /* Make current row = desired row. */
5219 make_current (desired_matrix
, current_matrix
, vpos
);
5223 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5224 characters in a row. */
5228 /* If current line is blank, skip over initial spaces, if
5229 possible, and write the rest. */
5230 if (write_spaces_p
|| desired_row
->inverse_p
)
5233 nsp
= count_blanks (nbody
, nlen
);
5237 cursor_to (vpos
, nsp
);
5238 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5241 /* Exchange contents between current_frame and new_frame. */
5242 make_current (desired_matrix
, current_matrix
, vpos
);
5246 /* Compute number of leading blanks in old and new contents. */
5247 osp
= count_blanks (obody
, olen
);
5248 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5250 : count_blanks (nbody
, nlen
));
5252 /* Compute number of matching chars starting with first non-blank. */
5253 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5254 nbody
+ nsp
, nbody
+ nlen
);
5256 /* Spaces in new match implicit space past the end of old. */
5257 /* A bug causing this to be a no-op was fixed in 18.29. */
5258 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5261 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5265 /* Avoid doing insert/delete char
5266 just cause number of leading spaces differs
5267 when the following text does not match. */
5268 if (begmatch
== 0 && osp
!= nsp
)
5269 osp
= nsp
= min (osp
, nsp
);
5271 /* Find matching characters at end of line */
5274 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5276 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5281 endmatch
= obody
+ olen
- op1
;
5283 /* tem gets the distance to insert or delete.
5284 endmatch is how many characters we save by doing so.
5287 tem
= (nlen
- nsp
) - (olen
- osp
);
5289 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
5292 /* nsp - osp is the distance to insert or delete.
5293 If that is nonzero, begmatch is known to be nonzero also.
5294 begmatch + endmatch is how much we save by doing the ins/del.
5298 && (!char_ins_del_ok
5299 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
5303 osp
= nsp
= min (osp
, nsp
);
5306 /* Now go through the line, inserting, writing and
5307 deleting as appropriate. */
5311 cursor_to (vpos
, nsp
);
5312 delete_glyphs (osp
- nsp
);
5316 /* If going to delete chars later in line
5317 and insert earlier in the line,
5318 must delete first to avoid losing data in the insert */
5319 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5321 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5322 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5323 olen
= nlen
- (nsp
- osp
);
5325 cursor_to (vpos
, osp
);
5326 insert_glyphs (0, nsp
- osp
);
5330 tem
= nsp
+ begmatch
+ endmatch
;
5331 if (nlen
!= tem
|| olen
!= tem
)
5333 cursor_to (vpos
, nsp
+ begmatch
);
5334 if (!endmatch
|| nlen
== olen
)
5336 /* If new text being written reaches right margin,
5337 there is no need to do clear-to-eol at the end.
5338 (and it would not be safe, since cursor is not
5339 going to be "at the margin" after the text is done) */
5340 if (nlen
== FRAME_WINDOW_WIDTH (frame
))
5342 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5344 else if (nlen
> olen
)
5346 /* Here, we used to have the following simple code:
5347 ----------------------------------------
5348 write_glyphs (nbody + nsp + begmatch, olen - tem);
5349 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5350 ----------------------------------------
5351 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5352 is a padding glyph. */
5353 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5356 /* Calculate columns we can actually overwrite. */
5357 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
])) out
--;
5358 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5359 /* If we left columns to be overwritten, we must delete them. */
5360 del
= olen
- tem
- out
;
5361 if (del
> 0) delete_glyphs (del
);
5362 /* At last, we insert columns not yet written out. */
5363 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5366 else if (olen
> nlen
)
5368 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5369 delete_glyphs (olen
- nlen
);
5375 /* If any unerased characters remain after the new line, erase them. */
5378 cursor_to (vpos
, nlen
);
5379 clear_end_of_line (olen
);
5382 /* Exchange contents between current_frame and new_frame. */
5383 make_current (desired_matrix
, current_matrix
, vpos
);
5388 /***********************************************************************
5389 X/Y Position -> Buffer Position
5390 ***********************************************************************/
5392 /* Return the character position of the character at window relative
5393 pixel position (*X, *Y). *X and *Y are adjusted to character
5397 buffer_posn_from_coords (w
, x
, y
)
5402 struct buffer
*old_current_buffer
= current_buffer
;
5403 struct text_pos startp
;
5404 int left_area_width
;
5406 current_buffer
= XBUFFER (w
->buffer
);
5407 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5408 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5409 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5410 start_display (&it
, w
, startp
);
5412 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5413 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5414 MOVE_TO_X
| MOVE_TO_Y
);
5416 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5418 current_buffer
= old_current_buffer
;
5419 return IT_CHARPOS (it
);
5423 /* Value is the string under window-relative coordinates X/Y in the
5424 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5425 means look at the mode line. *CHARPOS is set to the position in
5426 the string returned. */
5429 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5431 int x
, y
, mode_line_p
;
5434 struct glyph_row
*row
;
5435 struct glyph
*glyph
, *end
;
5436 struct frame
*f
= XFRAME (w
->frame
);
5438 Lisp_Object string
= Qnil
;
5441 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5443 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5445 if (row
->mode_line_p
&& row
->enabled_p
)
5447 /* The mode lines are displayed over scroll bars and bitmap
5448 areas, and X is window-relative. Correct X by the scroll bar
5449 and bitmap area width. */
5450 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5451 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5452 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5454 /* Find the glyph under X. If we find one with a string object,
5455 it's the one we were looking for. */
5456 glyph
= row
->glyphs
[TEXT_AREA
];
5457 end
= glyph
+ row
->used
[TEXT_AREA
];
5458 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5459 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5461 string
= glyph
->object
;
5462 *charpos
= glyph
->charpos
;
5471 /***********************************************************************
5472 Changing Frame Sizes
5473 ***********************************************************************/
5478 window_change_signal (signalnum
) /* If we don't have an argument, */
5479 int signalnum
; /* some compilers complain in signal calls. */
5485 int old_errno
= errno
;
5487 get_frame_size (&width
, &height
);
5489 /* The frame size change obviously applies to a termcap-controlled
5490 frame. Find such a frame in the list, and assume it's the only
5491 one (since the redisplay code always writes to stdout, not a
5492 FILE * specified in the frame structure). Record the new size,
5493 but don't reallocate the data structures now. Let that be done
5494 later outside of the signal handler. */
5497 Lisp_Object tail
, frame
;
5499 FOR_EACH_FRAME (tail
, frame
)
5501 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5503 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5509 signal (SIGWINCH
, window_change_signal
);
5512 #endif /* SIGWINCH */
5515 /* Do any change in frame size that was requested by a signal. SAFE
5516 non-zero means this function is called from a place where it is
5517 safe to change frame sizes while a redisplay is in progress. */
5520 do_pending_window_change (safe
)
5523 /* If window_change_signal should have run before, run it now. */
5524 if (redisplaying_p
&& !safe
)
5527 while (delayed_size_change
)
5529 Lisp_Object tail
, frame
;
5531 delayed_size_change
= 0;
5533 FOR_EACH_FRAME (tail
, frame
)
5535 struct frame
*f
= XFRAME (frame
);
5537 int height
= FRAME_NEW_HEIGHT (f
);
5538 int width
= FRAME_NEW_WIDTH (f
);
5540 if (height
!= 0 || width
!= 0)
5541 change_frame_size (f
, height
, width
, 0, 0, safe
);
5547 /* Change the frame height and/or width. Values may be given as zero to
5548 indicate no change is to take place.
5550 If DELAY is non-zero, then assume we're being called from a signal
5551 handler, and queue the change for later - perhaps the next
5552 redisplay. Since this tries to resize windows, we can't call it
5553 from a signal handler.
5555 SAFE non-zero means this function is called from a place where it's
5556 safe to change frame sizes while a redisplay is in progress. */
5559 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5560 register struct frame
*f
;
5561 int newheight
, newwidth
, pretend
, delay
, safe
;
5563 Lisp_Object tail
, frame
;
5565 if (! FRAME_WINDOW_P (f
))
5567 /* When using termcap, or on MS-DOS, all frames use
5568 the same screen, so a change in size affects all frames. */
5569 FOR_EACH_FRAME (tail
, frame
)
5570 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5571 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5572 pretend
, delay
, safe
);
5575 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5579 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5580 register struct frame
*f
;
5581 int newheight
, newwidth
, pretend
, delay
, safe
;
5583 int new_frame_window_width
;
5584 int count
= specpdl_ptr
- specpdl
;
5586 /* If we can't deal with the change now, queue it for later. */
5587 if (delay
|| (redisplaying_p
&& !safe
))
5589 FRAME_NEW_HEIGHT (f
) = newheight
;
5590 FRAME_NEW_WIDTH (f
) = newwidth
;
5591 delayed_size_change
= 1;
5595 /* This size-change overrides any pending one for this frame. */
5596 FRAME_NEW_HEIGHT (f
) = 0;
5597 FRAME_NEW_WIDTH (f
) = 0;
5599 /* If an argument is zero, set it to the current value. */
5601 newheight
= FRAME_HEIGHT (f
);
5603 newwidth
= FRAME_WIDTH (f
);
5605 /* Compute width of windows in F.
5606 This is the width of the frame without vertical scroll bars. */
5607 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5609 /* Round up to the smallest acceptable size. */
5610 check_frame_size (f
, &newheight
, &newwidth
);
5612 /* If we're not changing the frame size, quit now. */
5613 if (newheight
== FRAME_HEIGHT (f
)
5614 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5620 /* We only can set screen dimensions to certain values supported
5621 by our video hardware. Try to find the smallest size greater
5622 or equal to the requested dimensions. */
5623 dos_set_window_size (&newheight
, &newwidth
);
5626 if (newheight
!= FRAME_HEIGHT (f
))
5628 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5630 /* Frame has both root and mini-buffer. */
5631 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5632 FRAME_TOP_MARGIN (f
));
5633 set_window_height (FRAME_ROOT_WINDOW (f
),
5636 - FRAME_TOP_MARGIN (f
)),
5638 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5640 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5643 /* Frame has just one top-level window. */
5644 set_window_height (FRAME_ROOT_WINDOW (f
),
5645 newheight
- FRAME_TOP_MARGIN (f
), 0);
5647 if (FRAME_TERMCAP_P (f
) && !pretend
)
5648 FrameRows
= newheight
;
5651 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5653 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5654 if (FRAME_HAS_MINIBUF_P (f
))
5655 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5657 if (FRAME_TERMCAP_P (f
) && !pretend
)
5658 FrameCols
= newwidth
;
5660 if (WINDOWP (f
->tool_bar_window
))
5661 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5664 FRAME_HEIGHT (f
) = newheight
;
5665 SET_FRAME_WIDTH (f
, newwidth
);
5668 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5669 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5671 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5673 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5674 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5675 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5676 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5680 SET_FRAME_GARBAGED (f
);
5681 calculate_costs (f
);
5685 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5687 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5688 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5689 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5691 unbind_to (count
, Qnil
);
5696 /***********************************************************************
5697 Terminal Related Lisp Functions
5698 ***********************************************************************/
5700 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5701 1, 1, "FOpen termscript file: ",
5702 "Start writing all terminal output to FILE as well as the terminal.\n\
5703 FILE = nil means just close any termscript file currently open.")
5707 if (termscript
!= 0) fclose (termscript
);
5712 file
= Fexpand_file_name (file
, Qnil
);
5713 termscript
= fopen (XSTRING (file
)->data
, "w");
5714 if (termscript
== 0)
5715 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5721 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5722 Ssend_string_to_terminal
, 1, 1, 0,
5723 "Send STRING to the terminal without alteration.\n\
5724 Control characters in STRING will have terminal-dependent effects.")
5728 /* ??? Perhaps we should do something special for multibyte strings here. */
5729 CHECK_STRING (string
, 0);
5730 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
5734 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
5736 fflush (termscript
);
5742 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5743 "Beep, or flash the screen.\n\
5744 Also, unless an argument is given,\n\
5745 terminate any keyboard macro currently executing.")
5768 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5769 error ("Keyboard macro terminated by a command ringing the bell");
5777 /***********************************************************************
5779 ***********************************************************************/
5781 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5782 "Pause, without updating display, for SECONDS seconds.\n\
5783 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5784 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5785 additional wait period, in milliseconds; this may be useful if your\n\
5786 Emacs was built without floating point support.\n\
5787 \(Not all operating systems support waiting for a fraction of a second.)")
5788 (seconds
, milliseconds
)
5789 Lisp_Object seconds
, milliseconds
;
5793 if (NILP (milliseconds
))
5794 XSETINT (milliseconds
, 0);
5796 CHECK_NUMBER (milliseconds
, 1);
5797 usec
= XINT (milliseconds
) * 1000;
5800 double duration
= extract_float (seconds
);
5801 sec
= (int) duration
;
5802 usec
+= (duration
- sec
) * 1000000;
5805 #ifndef EMACS_HAS_USECS
5806 if (sec
== 0 && usec
!= 0)
5807 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5810 /* Assure that 0 <= usec < 1000000. */
5813 /* We can't rely on the rounding being correct if user is negative. */
5814 if (-1000000 < usec
)
5815 sec
--, usec
+= 1000000;
5817 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
5820 sec
+= usec
/ 1000000, usec
%= 1000000;
5822 if (sec
< 0 || (sec
== 0 && usec
== 0))
5828 XSETFASTINT (zero
, 0);
5829 wait_reading_process_input (sec
, usec
, zero
, 0);
5832 /* We should always have wait_reading_process_input; we have a dummy
5833 implementation for systems which don't support subprocesses. */
5835 /* No wait_reading_process_input */
5842 /* The reason this is done this way
5843 (rather than defined (H_S) && defined (H_T))
5844 is because the VMS preprocessor doesn't grok `defined' */
5846 EMACS_GET_TIME (end_time
);
5847 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
5848 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
5852 EMACS_GET_TIME (timeout
);
5853 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
5854 if (EMACS_TIME_NEG_P (timeout
)
5855 || !select (1, 0, 0, 0, &timeout
))
5858 #else /* not HAVE_SELECT */
5860 #endif /* HAVE_SELECT */
5861 #endif /* not VMS */
5864 #endif /* no subprocesses */
5870 /* This is just like wait_reading_process_input, except that
5871 it does the redisplay.
5873 It's also much like Fsit_for, except that it can be used for
5874 waiting for input as well. */
5877 sit_for (sec
, usec
, reading
, display
, initial_display
)
5878 int sec
, usec
, reading
, display
, initial_display
;
5880 Lisp_Object read_kbd
;
5882 swallow_events (display
);
5884 if (detect_input_pending_run_timers (display
))
5887 if (initial_display
)
5888 redisplay_preserve_echo_area ();
5890 if (sec
== 0 && usec
== 0)
5897 XSETINT (read_kbd
, reading
? -1 : 1);
5898 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
5900 return detect_input_pending () ? Qnil
: Qt
;
5904 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
5905 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
5906 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5907 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5908 additional wait period, in milliseconds; this may be useful if your\n\
5909 Emacs was built without floating point support.\n\
5910 \(Not all operating systems support waiting for a fraction of a second.)\n\
5911 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
5912 Redisplay is preempted as always if input arrives, and does not happen\n\
5913 if input is available before it starts.\n\
5914 Value is t if waited the full time with no input arriving.")
5915 (seconds
, milliseconds
, nodisp
)
5916 Lisp_Object seconds
, milliseconds
, nodisp
;
5920 if (NILP (milliseconds
))
5921 XSETINT (milliseconds
, 0);
5923 CHECK_NUMBER (milliseconds
, 1);
5924 usec
= XINT (milliseconds
) * 1000;
5927 double duration
= extract_float (seconds
);
5928 sec
= (int) duration
;
5929 usec
+= (duration
- sec
) * 1000000;
5932 #ifndef EMACS_HAS_USECS
5933 if (usec
!= 0 && sec
== 0)
5934 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
5937 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
5942 /***********************************************************************
5943 Other Lisp Functions
5944 ***********************************************************************/
5946 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
5947 session's frames, frame names, buffers, buffer-read-only flags, and
5948 buffer-modified-flags, and a trailing sentinel (so we don't need to
5949 add length checks). */
5951 static Lisp_Object frame_and_buffer_state
;
5954 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
5955 Sframe_or_buffer_changed_p
, 0, 0, 0,
5956 "Return non-nil if the frame and buffer state appears to have changed.\n\
5957 The state variable is an internal vector containing all frames and buffers,\n\
5958 aside from buffers whose names start with space,\n\
5959 along with the buffers' read-only and modified flags, which allows a fast\n\
5960 check to see whether the menu bars might need to be recomputed.\n\
5961 If this function returns non-nil, it updates the internal vector to reflect\n\
5962 the current state.\n")
5965 Lisp_Object tail
, frame
, buf
;
5969 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
5970 FOR_EACH_FRAME (tail
, frame
)
5972 if (!EQ (*vecp
++, frame
))
5974 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
5977 /* Check that the buffer info matches.
5978 No need to test for the end of the vector
5979 because the last element of the vector is lambda
5980 and that will always cause a mismatch. */
5981 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
5983 buf
= XCDR (XCAR (tail
));
5984 /* Ignore buffers that aren't included in buffer lists. */
5985 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
5987 if (!EQ (*vecp
++, buf
))
5989 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
5991 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
5994 /* Detect deletion of a buffer at the end of the list. */
5995 if (EQ (*vecp
, Qlambda
))
5998 /* Start with 1 so there is room for at least one lambda at the end. */
6000 FOR_EACH_FRAME (tail
, frame
)
6002 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6004 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6005 if (n
> XVECTOR (frame_and_buffer_state
)->size
6006 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6007 /* Add 20 extra so we grow it less often. */
6008 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6009 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6010 FOR_EACH_FRAME (tail
, frame
)
6013 *vecp
++ = XFRAME (frame
)->name
;
6015 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6017 buf
= XCDR (XCAR (tail
));
6018 /* Ignore buffers that aren't included in buffer lists. */
6019 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6022 *vecp
++ = XBUFFER (buf
)->read_only
;
6023 *vecp
++ = Fbuffer_modified_p (buf
);
6025 /* Fill up the vector with lambdas (always at least one). */
6027 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6028 < XVECTOR (frame_and_buffer_state
)->size
)
6030 /* Make sure we didn't overflow the vector. */
6031 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6032 > XVECTOR (frame_and_buffer_state
)->size
)
6039 /***********************************************************************
6041 ***********************************************************************/
6043 char *terminal_type
;
6045 /* Initialization done when Emacs fork is started, before doing stty.
6046 Determine terminal type and set terminal_driver. Then invoke its
6047 decoding routine to set up variables in the terminal package. */
6052 #ifdef HAVE_X_WINDOWS
6053 extern int display_arg
;
6056 /* Construct the space glyph. */
6057 space_glyph
.type
= CHAR_GLYPH
;
6058 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6059 space_glyph
.charpos
= -1;
6063 cursor_in_echo_area
= 0;
6064 terminal_type
= (char *) 0;
6066 /* Now is the time to initialize this; it's used by init_sys_modes
6068 Vwindow_system
= Qnil
;
6070 /* If the user wants to use a window system, we shouldn't bother
6071 initializing the terminal. This is especially important when the
6072 terminal is so dumb that emacs gives up before and doesn't bother
6073 using the window system.
6075 If the DISPLAY environment variable is set and nonempty,
6076 try to use X, and die with an error message if that doesn't work. */
6078 #ifdef HAVE_X_WINDOWS
6083 display
= getenv ("DECW$DISPLAY");
6085 display
= getenv ("DISPLAY");
6088 display_arg
= (display
!= 0 && *display
!= 0);
6091 if (!inhibit_window_system
&& display_arg
6097 Vwindow_system
= intern ("x");
6099 Vwindow_system_version
= make_number (11);
6101 Vwindow_system_version
= make_number (10);
6103 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6104 /* In some versions of ncurses,
6105 tputs crashes if we have not called tgetent.
6107 { char b
[2044]; tgetent (b
, "xterm");}
6109 adjust_frame_glyphs_initially ();
6112 #endif /* HAVE_X_WINDOWS */
6115 if (!inhibit_window_system
)
6117 Vwindow_system
= intern ("w32");
6118 Vwindow_system_version
= make_number (1);
6119 adjust_frame_glyphs_initially ();
6122 #endif /* HAVE_NTGUI */
6125 if (!inhibit_window_system
)
6127 Vwindow_system
= intern ("mac");
6128 Vwindow_system_version
= make_number (1);
6129 adjust_frame_glyphs_initially ();
6132 #endif /* macintosh */
6134 /* If no window system has been specified, try to use the terminal. */
6137 fatal ("standard input is not a tty");
6141 /* Look at the TERM variable */
6142 terminal_type
= (char *) getenv ("TERM");
6146 fprintf (stderr
, "Please specify your terminal type.\n\
6147 For types defined in VMS, use set term /device=TYPE.\n\
6148 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6149 \(The quotation marks are necessary since terminal types are lower case.)\n");
6151 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6157 /* VMS DCL tends to up-case things, so down-case term type.
6158 Hardly any uppercase letters in terminal types; should be none. */
6160 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6163 strcpy (new, terminal_type
);
6165 for (p
= new; *p
; p
++)
6169 terminal_type
= new;
6173 term_init (terminal_type
);
6176 struct frame
*sf
= SELECTED_FRAME ();
6177 int width
= FRAME_WINDOW_WIDTH (sf
);
6178 int height
= FRAME_HEIGHT (sf
);
6180 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6182 /* If these sizes are so big they cause overflow, just ignore the
6183 change. It's not clear what better we could do. */
6184 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6185 fatal ("screen size %dx%d too big", width
, height
);
6188 adjust_frame_glyphs_initially ();
6189 calculate_costs (XFRAME (selected_frame
));
6194 #endif /* CANNOT_DUMP */
6195 signal (SIGWINCH
, window_change_signal
);
6196 #endif /* SIGWINCH */
6198 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6202 /* The MSDOS terminal turns on its ``window system'' relatively
6203 late into the startup, so we cannot do the frame faces'
6204 initialization just yet. It will be done later by pc-win.el
6205 and internal_terminal_init. */
6206 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6208 && NILP (Vwindow_system
))
6210 /* For the initial frame, we don't have any way of knowing what
6211 are the foreground and background colors of the terminal. */
6212 struct frame
*sf
= SELECTED_FRAME();
6214 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6215 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6216 call0 (intern ("tty-set-up-initial-frame-faces"));
6222 /***********************************************************************
6224 ***********************************************************************/
6226 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6227 Sinternal_show_cursor
, 2, 2, 0,
6228 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6229 WINDOW nil means use the selected window. SHOW non-nil means\n\
6230 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6231 don't show a cursor.")
6233 Lisp_Object window
, show
;
6235 /* Don't change cursor state while redisplaying. This could confuse
6237 if (!redisplaying_p
)
6240 window
= selected_window
;
6242 CHECK_WINDOW (window
, 2);
6244 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6251 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6252 Sinternal_show_cursor_p
, 0, 1, 0,
6253 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6254 WINDOW nil or omitted means report on the selected window.")
6261 window
= selected_window
;
6263 CHECK_WINDOW (window
, 2);
6265 w
= XWINDOW (window
);
6266 return w
->cursor_off_p
? Qnil
: Qt
;
6270 /***********************************************************************
6272 ***********************************************************************/
6277 defsubr (&Sredraw_frame
);
6278 defsubr (&Sredraw_display
);
6279 defsubr (&Sframe_or_buffer_changed_p
);
6280 defsubr (&Sopen_termscript
);
6282 defsubr (&Ssit_for
);
6283 defsubr (&Ssleep_for
);
6284 defsubr (&Ssend_string_to_terminal
);
6285 defsubr (&Sinternal_show_cursor
);
6286 defsubr (&Sinternal_show_cursor_p
);
6288 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6289 staticpro (&frame_and_buffer_state
);
6291 Qdisplay_table
= intern ("display-table");
6292 staticpro (&Qdisplay_table
);
6293 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6294 staticpro (&Qredisplay_dont_pause
);
6296 DEFVAR_INT ("baud-rate", &baud_rate
,
6297 "*The output baud rate of the terminal.\n\
6298 On most systems, changing this value will affect the amount of padding\n\
6299 and the other strategic decisions made during redisplay.");
6301 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6302 "*Non-nil means invert the entire frame display.\n\
6303 This means everything is in inverse video which otherwise would not be.");
6305 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6306 "*Non-nil means try to flash the frame to represent a bell.");
6308 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6309 "*Non-nil means no need to redraw entire frame after suspending.\n\
6310 A non-nil value is useful if the terminal can automatically preserve\n\
6311 Emacs's frame display when you reenter Emacs.\n\
6312 It is up to you to set this variable if your terminal can do that.");
6314 DEFVAR_LISP ("window-system", &Vwindow_system
,
6315 "A symbol naming the window-system under which Emacs is running\n\
6316 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6318 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6319 "The version number of the window system in use.\n\
6320 For X windows, this is 10 or 11.");
6322 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6323 "Non-nil means put cursor in minibuffer, at end of any message there.");
6325 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6326 "Table defining how to output a glyph code to the frame.\n\
6327 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6328 Each element can be:\n\
6329 integer: a glyph code which this glyph is an alias for.\n\
6330 string: output this glyph using that string (not impl. in X windows).\n\
6331 nil: this glyph mod 256 is char code to output,\n\
6332 and this glyph / 256 is face code for X windows (see `face-id').");
6333 Vglyph_table
= Qnil
;
6335 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6336 "Display table to use for buffers that specify none.\n\
6337 See `buffer-display-table' for more information.");
6338 Vstandard_display_table
= Qnil
;
6340 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6341 "*Non-nil means update isn't paused when input is detected.");
6342 redisplay_dont_pause
= 0;
6344 /* Initialize `window-system', unless init_display already decided it. */
6349 Vwindow_system
= Qnil
;
6350 Vwindow_system_version
= Qnil
;