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
= -1, 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_left_x
== XFASTINT (w
->left
)
554 && matrix
->window_top_y
== XFASTINT (w
->top
)
555 && matrix
->window_height
== window_height
556 && matrix
->window_vscroll
== w
->vscroll
557 && matrix
->window_width
== window_width
)
561 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
562 if (matrix
->rows_allocated
< dim
.height
)
564 int size
= dim
.height
* sizeof (struct glyph_row
);
565 new_rows
= dim
.height
- matrix
->rows_allocated
;
566 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
567 bzero (matrix
->rows
+ matrix
->rows_allocated
,
568 new_rows
* sizeof *matrix
->rows
);
569 matrix
->rows_allocated
= dim
.height
;
574 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
575 on a frame not using window-based redisplay. Set up pointers for
576 each row into the glyph pool. */
579 xassert (matrix
->pool
->glyphs
);
583 left
= margin_glyphs_to_reserve (w
, dim
.width
,
584 w
->left_margin_width
);
585 right
= margin_glyphs_to_reserve (w
, dim
.width
,
586 w
->right_margin_width
);
591 for (i
= 0; i
< dim
.height
; ++i
)
593 struct glyph_row
*row
= &matrix
->rows
[i
];
595 row
->glyphs
[LEFT_MARGIN_AREA
]
596 = (matrix
->pool
->glyphs
597 + (y
+ i
) * matrix
->pool
->ncolumns
601 || row
== matrix
->rows
+ dim
.height
- 1
602 || (row
== matrix
->rows
&& matrix
->header_line_p
))
604 row
->glyphs
[TEXT_AREA
]
605 = row
->glyphs
[LEFT_MARGIN_AREA
];
606 row
->glyphs
[RIGHT_MARGIN_AREA
]
607 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
608 row
->glyphs
[LAST_AREA
]
609 = row
->glyphs
[RIGHT_MARGIN_AREA
];
613 row
->glyphs
[TEXT_AREA
]
614 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
615 row
->glyphs
[RIGHT_MARGIN_AREA
]
616 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
617 row
->glyphs
[LAST_AREA
]
618 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
622 matrix
->left_margin_glyphs
= left
;
623 matrix
->right_margin_glyphs
= right
;
627 /* If MATRIX->pool is null, MATRIX is responsible for managing
628 its own memory. Allocate glyph memory from the heap. */
629 if (dim
.width
> matrix
->matrix_w
631 || header_line_changed_p
632 || marginal_areas_changed_p
)
634 struct glyph_row
*row
= matrix
->rows
;
635 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
639 row
->glyphs
[LEFT_MARGIN_AREA
]
640 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
642 * sizeof (struct glyph
)));
644 /* The mode line never has marginal areas. */
645 if (row
== matrix
->rows
+ dim
.height
- 1
646 || (row
== matrix
->rows
&& matrix
->header_line_p
))
648 row
->glyphs
[TEXT_AREA
]
649 = row
->glyphs
[LEFT_MARGIN_AREA
];
650 row
->glyphs
[RIGHT_MARGIN_AREA
]
651 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
652 row
->glyphs
[LAST_AREA
]
653 = row
->glyphs
[RIGHT_MARGIN_AREA
];
657 row
->glyphs
[TEXT_AREA
]
658 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
659 row
->glyphs
[RIGHT_MARGIN_AREA
]
660 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
661 row
->glyphs
[LAST_AREA
]
662 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
668 xassert (left
>= 0 && right
>= 0);
669 matrix
->left_margin_glyphs
= left
;
670 matrix
->right_margin_glyphs
= right
;
673 /* Number of rows to be used by MATRIX. */
674 matrix
->nrows
= dim
.height
;
675 xassert (matrix
->nrows
>= 0);
677 /* Mark rows in a current matrix of a window as not having valid
678 contents. It's important to not do this for desired matrices.
679 When Emacs starts, it may already be building desired matrices
680 when this function runs. */
681 if (w
&& matrix
== w
->current_matrix
)
683 if (window_width
< 0)
684 window_width
= window_box_width (w
, -1);
686 /* Optimize the case that only the height has changed (C-x 2,
687 upper window). Invalidate all rows that are no longer part
689 if (!marginal_areas_changed_p
690 && matrix
->window_left_x
== XFASTINT (w
->left
)
691 && matrix
->window_top_y
== XFASTINT (w
->top
)
692 && matrix
->window_width
== window_box_width (w
, -1))
695 while (matrix
->rows
[i
].enabled_p
696 && (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
)
697 < matrix
->window_height
))
700 /* Window end is invalid, if inside of the rows that
702 if (INTEGERP (w
->window_end_vpos
)
703 && XFASTINT (w
->window_end_vpos
) >= i
)
704 w
->window_end_valid
= Qnil
;
706 while (i
< matrix
->nrows
)
707 matrix
->rows
[i
++].enabled_p
= 0;
711 for (i
= 0; i
< matrix
->nrows
; ++i
)
712 matrix
->rows
[i
].enabled_p
= 0;
716 /* Remember last values to be able to optimize frame redraws. */
717 matrix
->matrix_x
= x
;
718 matrix
->matrix_y
= y
;
719 matrix
->matrix_w
= dim
.width
;
720 matrix
->matrix_h
= dim
.height
;
722 /* Record the top y location and height of W at the time the matrix
723 was last adjusted. This is used to optimize redisplay above. */
726 matrix
->window_left_x
= XFASTINT (w
->left
);
727 matrix
->window_top_y
= XFASTINT (w
->top
);
728 matrix
->window_height
= window_height
;
729 matrix
->window_width
= window_width
;
730 matrix
->window_vscroll
= w
->vscroll
;
735 /* Reverse the contents of rows in MATRIX between START and END. The
736 contents of the row at END - 1 end up at START, END - 2 at START +
737 1 etc. This is part of the implementation of rotate_matrix (see
741 reverse_rows (matrix
, start
, end
)
742 struct glyph_matrix
*matrix
;
747 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
749 /* Non-ISO HP/UX compiler doesn't like auto struct
751 struct glyph_row temp
;
752 temp
= matrix
->rows
[i
];
753 matrix
->rows
[i
] = matrix
->rows
[j
];
754 matrix
->rows
[j
] = temp
;
759 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
760 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
761 indices. (Note: this does not copy glyphs, only glyph pointers in
762 row structures are moved around).
764 The algorithm used for rotating the vector was, I believe, first
765 described by Kernighan. See the vector R as consisting of two
766 sub-vectors AB, where A has length BY for BY >= 0. The result
767 after rotating is then BA. Reverse both sub-vectors to get ArBr
768 and reverse the result to get (ArBr)r which is BA. Similar for
772 rotate_matrix (matrix
, first
, last
, by
)
773 struct glyph_matrix
*matrix
;
778 /* Up (rotate left, i.e. towards lower indices). */
780 reverse_rows (matrix
, first
, first
+ by
);
781 reverse_rows (matrix
, first
+ by
, last
);
782 reverse_rows (matrix
, first
, last
);
786 /* Down (rotate right, i.e. towards higher indices). */
787 reverse_rows (matrix
, last
- by
, last
);
788 reverse_rows (matrix
, first
, last
- by
);
789 reverse_rows (matrix
, first
, last
);
794 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
795 with indices START <= index < END. Increment positions by DELTA/
799 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
800 struct glyph_matrix
*matrix
;
801 int start
, end
, delta
, delta_bytes
;
803 /* Check that START and END are reasonable values. */
804 xassert (start
>= 0 && start
<= matrix
->nrows
);
805 xassert (end
>= 0 && end
<= matrix
->nrows
);
806 xassert (start
<= end
);
808 for (; start
< end
; ++start
)
809 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
813 /* Enable a range of rows in glyph matrix MATRIX. START and END are
814 the row indices of the first and last + 1 row to enable. If
815 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
818 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
819 struct glyph_matrix
*matrix
;
823 xassert (start
<= end
);
824 xassert (start
>= 0 && start
< matrix
->nrows
);
825 xassert (end
>= 0 && end
<= matrix
->nrows
);
827 for (; start
< end
; ++start
)
828 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
834 This empties all rows in MATRIX by setting the enabled_p flag for
835 all rows of the matrix to zero. The function prepare_desired_row
836 will eventually really clear a row when it sees one with a zero
839 Resets update hints to defaults value. The only update hint
840 currently present is the flag MATRIX->no_scrolling_p. */
843 clear_glyph_matrix (matrix
)
844 struct glyph_matrix
*matrix
;
848 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
849 matrix
->no_scrolling_p
= 0;
854 /* Shift part of the glyph matrix MATRIX of window W up or down.
855 Increment y-positions in glyph rows between START and END by DY,
856 and recompute their visible height. */
859 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
861 struct glyph_matrix
*matrix
;
866 xassert (start
<= end
);
867 xassert (start
>= 0 && start
< matrix
->nrows
);
868 xassert (end
>= 0 && end
<= matrix
->nrows
);
870 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
871 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
873 for (; start
< end
; ++start
)
875 struct glyph_row
*row
= &matrix
->rows
[start
];
880 row
->visible_height
= row
->height
- (min_y
- row
->y
);
881 else if (row
->y
+ row
->height
> max_y
)
882 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
884 row
->visible_height
= row
->height
;
889 /* Mark all rows in current matrices of frame F as invalid. Marking
890 invalid is done by setting enabled_p to zero for all rows in a
894 clear_current_matrices (f
)
895 register struct frame
*f
;
897 /* Clear frame current matrix, if we have one. */
898 if (f
->current_matrix
)
899 clear_glyph_matrix (f
->current_matrix
);
901 /* Clear the matrix of the menu bar window, if such a window exists.
902 The menu bar window is currently used to display menus on X when
903 no toolkit support is compiled in. */
904 if (WINDOWP (f
->menu_bar_window
))
905 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
907 /* Clear the matrix of the tool-bar window, if any. */
908 if (WINDOWP (f
->tool_bar_window
))
909 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
911 /* Clear current window matrices. */
912 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
913 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
917 /* Clear out all display lines of F for a coming redisplay. */
920 clear_desired_matrices (f
)
921 register struct frame
*f
;
923 if (f
->desired_matrix
)
924 clear_glyph_matrix (f
->desired_matrix
);
926 if (WINDOWP (f
->menu_bar_window
))
927 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
929 if (WINDOWP (f
->tool_bar_window
))
930 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
932 /* Do it for window matrices. */
933 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
934 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
938 /* Clear matrices in window tree rooted in W. If DESIRED_P is
939 non-zero clear desired matrices, otherwise clear current matrices. */
942 clear_window_matrices (w
, desired_p
)
948 if (!NILP (w
->hchild
))
950 xassert (WINDOWP (w
->hchild
));
951 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
953 else if (!NILP (w
->vchild
))
955 xassert (WINDOWP (w
->vchild
));
956 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
961 clear_glyph_matrix (w
->desired_matrix
);
964 clear_glyph_matrix (w
->current_matrix
);
965 w
->window_end_valid
= Qnil
;
969 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
975 /***********************************************************************
978 See dispextern.h for an overall explanation of glyph rows.
979 ***********************************************************************/
981 /* Clear glyph row ROW. Do it in a way that makes it robust against
982 changes in the glyph_row structure, i.e. addition or removal of
983 structure members. */
985 static struct glyph_row null_row
;
988 clear_glyph_row (row
)
989 struct glyph_row
*row
;
991 struct glyph
*p
[1 + LAST_AREA
];
994 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
995 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
996 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
997 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1002 /* Restore pointers. */
1003 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1004 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1005 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1006 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1008 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1009 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1010 Redisplay outputs such glyphs, and flickering effects were
1011 the result. This also depended on the contents of memory
1012 returned by xmalloc. If flickering happens again, activate
1013 the code below If the flickering is gone with that, chances
1014 are that the flickering has the same reason as here. */
1015 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1020 /* Make ROW an empty, enabled row of canonical character height,
1021 in window W starting at y-position Y. */
1024 blank_row (w
, row
, y
)
1026 struct glyph_row
*row
;
1031 min_y
= WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w
);
1032 max_y
= WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE (w
);
1034 clear_glyph_row (row
);
1036 row
->ascent
= row
->phys_ascent
= 0;
1037 row
->height
= row
->phys_height
= CANON_Y_UNIT (XFRAME (w
->frame
));
1040 row
->visible_height
= row
->height
- (min_y
- row
->y
);
1041 else if (row
->y
+ row
->height
> max_y
)
1042 row
->visible_height
= row
->height
- (row
->y
+ row
->height
- max_y
);
1044 row
->visible_height
= row
->height
;
1050 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1051 are the amounts by which to change positions. Note that the first
1052 glyph of the text area of a row can have a buffer position even if
1053 the used count of the text area is zero. Such rows display line
1057 increment_row_positions (row
, delta
, delta_bytes
)
1058 struct glyph_row
*row
;
1059 int delta
, delta_bytes
;
1063 /* Increment start and end positions. */
1064 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1065 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1066 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1067 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1069 /* Increment positions in glyphs. */
1070 for (area
= 0; area
< LAST_AREA
; ++area
)
1071 for (i
= 0; i
< row
->used
[area
]; ++i
)
1072 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1073 && row
->glyphs
[area
][i
].charpos
> 0)
1074 row
->glyphs
[area
][i
].charpos
+= delta
;
1076 /* Capture the case of rows displaying a line end. */
1077 if (row
->used
[TEXT_AREA
] == 0
1078 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1079 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1084 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1085 contents, i.e. glyph structure contents are exchanged between A and
1086 B without changing glyph pointers in A and B. */
1089 swap_glyphs_in_rows (a
, b
)
1090 struct glyph_row
*a
, *b
;
1094 for (area
= 0; area
< LAST_AREA
; ++area
)
1096 /* Number of glyphs to swap. */
1097 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1099 /* Start of glyphs in area of row A. */
1100 struct glyph
*glyph_a
= a
->glyphs
[area
];
1102 /* End + 1 of glyphs in area of row A. */
1103 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1105 /* Start of glyphs in area of row B. */
1106 struct glyph
*glyph_b
= b
->glyphs
[area
];
1108 while (glyph_a
< glyph_a_end
)
1110 /* Non-ISO HP/UX compiler doesn't like auto struct
1114 *glyph_a
= *glyph_b
;
1124 /* Exchange pointers to glyph memory between glyph rows A and B. */
1127 swap_glyph_pointers (a
, b
)
1128 struct glyph_row
*a
, *b
;
1131 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1133 struct glyph
*temp
= a
->glyphs
[i
];
1134 a
->glyphs
[i
] = b
->glyphs
[i
];
1135 b
->glyphs
[i
] = temp
;
1140 /* Copy glyph row structure FROM to glyph row structure TO, except
1141 that glyph pointers in the structures are left unchanged. */
1144 copy_row_except_pointers (to
, from
)
1145 struct glyph_row
*to
, *from
;
1147 struct glyph
*pointers
[1 + LAST_AREA
];
1149 /* Save glyph pointers of TO. */
1150 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1152 /* Do a structure assignment. */
1155 /* Restore original pointers of TO. */
1156 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1160 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1161 TO and FROM are left unchanged. Glyph contents are copied from the
1162 glyph memory of FROM to the glyph memory of TO. Increment buffer
1163 positions in row TO by DELTA/ DELTA_BYTES. */
1166 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1167 struct glyph_row
*to
, *from
;
1168 int delta
, delta_bytes
;
1172 /* This is like a structure assignment TO = FROM, except that
1173 glyph pointers in the rows are left unchanged. */
1174 copy_row_except_pointers (to
, from
);
1176 /* Copy glyphs from FROM to TO. */
1177 for (area
= 0; area
< LAST_AREA
; ++area
)
1178 if (from
->used
[area
])
1179 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1180 from
->used
[area
] * sizeof (struct glyph
));
1182 /* Increment buffer positions in TO by DELTA. */
1183 increment_row_positions (to
, delta
, delta_bytes
);
1187 /* Assign glyph row FROM to glyph row TO. This works like a structure
1188 assignment TO = FROM, except that glyph pointers are not copied but
1189 exchanged between TO and FROM. Pointers must be exchanged to avoid
1193 assign_row (to
, from
)
1194 struct glyph_row
*to
, *from
;
1196 swap_glyph_pointers (to
, from
);
1197 copy_row_except_pointers (to
, from
);
1201 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1202 a row in a window matrix, is a slice of the glyph memory of the
1203 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1204 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1205 memory of FRAME_ROW. */
1210 glyph_row_slice_p (window_row
, frame_row
)
1211 struct glyph_row
*window_row
, *frame_row
;
1213 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1214 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1215 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1217 return (frame_glyph_start
<= window_glyph_start
1218 && window_glyph_start
< frame_glyph_end
);
1221 #endif /* GLYPH_DEBUG */
1225 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1226 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1227 in WINDOW_MATRIX is found satisfying the condition. */
1229 static struct glyph_row
*
1230 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1231 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1236 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1238 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1239 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1240 frame_matrix
->rows
+ row
))
1243 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1248 /* Prepare ROW for display. Desired rows are cleared lazily,
1249 i.e. they are only marked as to be cleared by setting their
1250 enabled_p flag to zero. When a row is to be displayed, a prior
1251 call to this function really clears it. */
1254 prepare_desired_row (row
)
1255 struct glyph_row
*row
;
1257 if (!row
->enabled_p
)
1259 clear_glyph_row (row
);
1265 /* Return a hash code for glyph row ROW. */
1268 line_hash_code (row
)
1269 struct glyph_row
*row
;
1277 /* Give all highlighted lines the same hash code
1278 so as to encourage scrolling to leave them in place. */
1283 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1284 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1288 int c
= glyph
->u
.ch
;
1289 int face_id
= glyph
->face_id
;
1290 if (must_write_spaces
)
1292 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1293 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1306 /* Return the cost of drawing line VPOS In MATRIX. The cost equals
1307 the number of characters in the line. If must_write_spaces is
1308 zero, leading and trailing spaces are ignored. */
1311 line_draw_cost (matrix
, vpos
)
1312 struct glyph_matrix
*matrix
;
1315 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1316 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1317 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1319 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1320 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1322 /* Ignore trailing and leading spaces if we can. */
1323 if (!must_write_spaces
)
1325 /* Skip from the end over trailing spaces. */
1326 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1329 /* All blank line. */
1333 /* Skip over leading spaces. */
1334 while (CHAR_GLYPH_SPACE_P (*beg
))
1338 /* If we don't have a glyph-table, each glyph is one character,
1339 so return the number of glyphs. */
1340 if (glyph_table_base
== 0)
1344 /* Otherwise, scan the glyphs and accumulate their total length
1349 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1352 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1355 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1365 /* Test two glyph rows A and B for equality. Value is non-zero if A
1366 and B have equal contents. W is the window to which the glyphs
1367 rows A and B belong. It is needed here to test for partial row
1368 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1369 flags of A and B, too. */
1372 row_equal_p (w
, a
, b
, mouse_face_p
)
1374 struct glyph_row
*a
, *b
;
1379 else if (a
->hash
!= b
->hash
)
1383 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1386 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1389 /* Compare glyphs. */
1390 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1392 if (a
->used
[area
] != b
->used
[area
])
1395 a_glyph
= a
->glyphs
[area
];
1396 a_end
= a_glyph
+ a
->used
[area
];
1397 b_glyph
= b
->glyphs
[area
];
1399 while (a_glyph
< a_end
1400 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1401 ++a_glyph
, ++b_glyph
;
1403 if (a_glyph
!= a_end
)
1407 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1408 || a
->inverse_p
!= b
->inverse_p
1409 || a
->fill_line_p
!= b
->fill_line_p
1410 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1411 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1412 || a
->continued_p
!= b
->continued_p
1413 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1414 || a
->overlapped_p
!= b
->overlapped_p
1415 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1416 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1417 /* Different partially visible characters on left margin. */
1419 /* Different height. */
1420 || a
->ascent
!= b
->ascent
1421 || a
->phys_ascent
!= b
->phys_ascent
1422 || a
->phys_height
!= b
->phys_height
1423 || a
->visible_height
!= b
->visible_height
)
1432 /***********************************************************************
1435 See dispextern.h for an overall explanation of glyph pools.
1436 ***********************************************************************/
1438 /* Allocate a glyph_pool structure. The structure returned is
1439 initialized with zeros. The global variable glyph_pool_count is
1440 incremented for each pool allocated. */
1442 static struct glyph_pool
*
1445 struct glyph_pool
*result
;
1447 /* Allocate a new glyph_pool and clear it. */
1448 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1449 bzero (result
, sizeof *result
);
1451 /* For memory leak and double deletion checking. */
1458 /* Free a glyph_pool structure POOL. The function may be called with
1459 a null POOL pointer. The global variable glyph_pool_count is
1460 decremented with every pool structure freed. If this count gets
1461 negative, more structures were freed than allocated, i.e. one
1462 structure must have been freed more than once or a bogus pointer
1463 was passed to free_glyph_pool. */
1466 free_glyph_pool (pool
)
1467 struct glyph_pool
*pool
;
1471 /* More freed than allocated? */
1473 xassert (glyph_pool_count
>= 0);
1475 xfree (pool
->glyphs
);
1481 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1482 columns we need. This function never shrinks a pool. The only
1483 case in which this would make sense, would be when a frame's size
1484 is changed from a large value to a smaller one. But, if someone
1485 does it once, we can expect that he will do it again.
1487 Value is non-zero if the pool changed in a way which makes
1488 re-adjusting window glyph matrices necessary. */
1491 realloc_glyph_pool (pool
, matrix_dim
)
1492 struct glyph_pool
*pool
;
1493 struct dim matrix_dim
;
1498 changed_p
= (pool
->glyphs
== 0
1499 || matrix_dim
.height
!= pool
->nrows
1500 || matrix_dim
.width
!= pool
->ncolumns
);
1502 /* Enlarge the glyph pool. */
1503 needed
= matrix_dim
.width
* matrix_dim
.height
;
1504 if (needed
> pool
->nglyphs
)
1506 int size
= needed
* sizeof (struct glyph
);
1509 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1512 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1513 bzero (pool
->glyphs
, size
);
1516 pool
->nglyphs
= needed
;
1519 /* Remember the number of rows and columns because (a) we use then
1520 to do sanity checks, and (b) the number of columns determines
1521 where rows in the frame matrix start---this must be available to
1522 determine pointers to rows of window sub-matrices. */
1523 pool
->nrows
= matrix_dim
.height
;
1524 pool
->ncolumns
= matrix_dim
.width
;
1531 /***********************************************************************
1533 ***********************************************************************/
1538 /* Flush standard output. This is sometimes useful to call from
1548 /* Check that no glyph pointers have been lost in MATRIX. If a
1549 pointer has been lost, e.g. by using a structure assignment between
1550 rows, at least one pointer must occur more than once in the rows of
1554 check_matrix_pointer_lossage (matrix
)
1555 struct glyph_matrix
*matrix
;
1559 for (i
= 0; i
< matrix
->nrows
; ++i
)
1560 for (j
= 0; j
< matrix
->nrows
; ++j
)
1562 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1563 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1567 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1570 matrix_row (matrix
, row
)
1571 struct glyph_matrix
*matrix
;
1574 xassert (matrix
&& matrix
->rows
);
1575 xassert (row
>= 0 && row
< matrix
->nrows
);
1577 /* That's really too slow for normal testing because this function
1578 is called almost everywhere. Although---it's still astonishingly
1579 fast, so it is valuable to have for debugging purposes. */
1581 check_matrix_pointer_lossage (matrix
);
1584 return matrix
->rows
+ row
;
1588 #if 0 /* This function makes invalid assumptions when text is
1589 partially invisible. But it might come handy for debugging
1592 /* Check invariants that must hold for an up to date current matrix of
1596 check_matrix_invariants (w
)
1599 struct glyph_matrix
*matrix
= w
->current_matrix
;
1600 int yb
= window_text_bottom_y (w
);
1601 struct glyph_row
*row
= matrix
->rows
;
1602 struct glyph_row
*last_text_row
= NULL
;
1603 struct buffer
*saved
= current_buffer
;
1604 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1607 /* This can sometimes happen for a fresh window. */
1608 if (matrix
->nrows
< 2)
1611 set_buffer_temp (buffer
);
1613 /* Note: last row is always reserved for the mode line. */
1614 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1615 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1617 struct glyph_row
*next
= row
+ 1;
1619 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1620 last_text_row
= row
;
1622 /* Check that character and byte positions are in sync. */
1623 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1624 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1626 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1627 have such a position temporarily in case of a minibuffer
1628 displaying something like `[Sole completion]' at its end. */
1629 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1630 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1631 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1633 /* Check that end position of `row' is equal to start position
1635 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1637 xassert (MATRIX_ROW_END_CHARPOS (row
)
1638 == MATRIX_ROW_START_CHARPOS (next
));
1639 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1640 == MATRIX_ROW_START_BYTEPOS (next
));
1645 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1646 xassert (w
->desired_matrix
->rows
!= NULL
);
1647 set_buffer_temp (saved
);
1652 #endif /* GLYPH_DEBUG != 0 */
1656 /**********************************************************************
1657 Allocating/ Adjusting Glyph Matrices
1658 **********************************************************************/
1660 /* Allocate glyph matrices over a window tree for a frame-based
1663 X and Y are column/row within the frame glyph matrix where
1664 sub-matrices for the window tree rooted at WINDOW must be
1665 allocated. CH_DIM contains the dimensions of the smallest
1666 character that could be used during display. DIM_ONLY_P non-zero
1667 means that the caller of this function is only interested in the
1668 result matrix dimension, and matrix adjustments should not be
1671 The function returns the total width/height of the sub-matrices of
1672 the window tree. If called on a frame root window, the computation
1673 will take the mini-buffer window into account.
1675 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1677 NEW_LEAF_MATRIX set if any window in the tree did not have a
1678 glyph matrices yet, and
1680 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1681 any window in the tree will be changed or have been changed (see
1684 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1687 Windows are arranged into chains of windows on the same level
1688 through the next fields of window structures. Such a level can be
1689 either a sequence of horizontally adjacent windows from left to
1690 right, or a sequence of vertically adjacent windows from top to
1691 bottom. Each window in a horizontal sequence can be either a leaf
1692 window or a vertical sequence; a window in a vertical sequence can
1693 be either a leaf or a horizontal sequence. All windows in a
1694 horizontal sequence have the same height, and all windows in a
1695 vertical sequence have the same width.
1697 This function uses, for historical reasons, a more general
1698 algorithm to determine glyph matrix dimensions that would be
1701 The matrix height of a horizontal sequence is determined by the
1702 maximum height of any matrix in the sequence. The matrix width of
1703 a horizontal sequence is computed by adding up matrix widths of
1704 windows in the sequence.
1706 |<------- result width ------->|
1707 +---------+----------+---------+ ---
1710 +---------+ | | result height
1715 The matrix width of a vertical sequence is the maximum matrix width
1716 of any window in the sequence. Its height is computed by adding up
1717 matrix heights of windows in the sequence.
1719 |<---- result width -->|
1727 +------------+---------+ |
1730 +------------+---------+ --- */
1732 /* Bit indicating that a new matrix will be allocated or has been
1735 #define NEW_LEAF_MATRIX (1 << 0)
1737 /* Bit indicating that a matrix will or has changed its location or
1740 #define CHANGED_LEAF_MATRIX (1 << 1)
1743 allocate_matrices_for_frame_redisplay (window
, x
, y
, ch_dim
,
1744 dim_only_p
, window_change_flags
)
1749 int *window_change_flags
;
1751 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1753 int wmax
= 0, hmax
= 0;
1757 int in_horz_combination_p
;
1759 /* What combination is WINDOW part of? Compute this once since the
1760 result is the same for all windows in the `next' chain. The
1761 special case of a root window (parent equal to nil) is treated
1762 like a vertical combination because a root window's `next'
1763 points to the mini-buffer window, if any, which is arranged
1764 vertically below other windows. */
1765 in_horz_combination_p
1766 = (!NILP (XWINDOW (window
)->parent
)
1767 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1769 /* For WINDOW and all windows on the same level. */
1772 w
= XWINDOW (window
);
1774 /* Get the dimension of the window sub-matrix for W, depending
1775 on whether this a combination or a leaf window. */
1776 if (!NILP (w
->hchild
))
1777 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
, ch_dim
,
1779 window_change_flags
);
1780 else if (!NILP (w
->vchild
))
1781 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
, ch_dim
,
1783 window_change_flags
);
1786 /* If not already done, allocate sub-matrix structures. */
1787 if (w
->desired_matrix
== NULL
)
1789 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1790 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1791 *window_change_flags
|= NEW_LEAF_MATRIX
;
1794 /* Width and height MUST be chosen so that there are no
1795 holes in the frame matrix. */
1796 dim
.width
= XINT (w
->width
);
1797 dim
.height
= XINT (w
->height
);
1799 /* Will matrix be re-allocated? */
1800 if (x
!= w
->desired_matrix
->matrix_x
1801 || y
!= w
->desired_matrix
->matrix_y
1802 || dim
.width
!= w
->desired_matrix
->matrix_w
1803 || dim
.height
!= w
->desired_matrix
->matrix_h
1804 || (margin_glyphs_to_reserve (w
, dim
.width
,
1805 w
->right_margin_width
)
1806 != w
->desired_matrix
->left_margin_glyphs
)
1807 || (margin_glyphs_to_reserve (w
, dim
.width
,
1808 w
->left_margin_width
)
1809 != w
->desired_matrix
->right_margin_glyphs
))
1810 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1812 /* Actually change matrices, if allowed. Do not consider
1813 CHANGED_LEAF_MATRIX computed above here because the pool
1814 may have been changed which we don't now here. We trust
1815 that we only will be called with DIM_ONLY_P != 0 when
1819 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1820 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1824 /* If we are part of a horizontal combination, advance x for
1825 windows to the right of W; otherwise advance y for windows
1827 if (in_horz_combination_p
)
1832 /* Remember maximum glyph matrix dimensions. */
1833 wmax
= max (wmax
, dim
.width
);
1834 hmax
= max (hmax
, dim
.height
);
1836 /* Next window on same level. */
1839 while (!NILP (window
));
1841 /* Set `total' to the total glyph matrix dimension of this window
1842 level. In a vertical combination, the width is the width of the
1843 widest window; the height is the y we finally reached, corrected
1844 by the y we started with. In a horizontal combination, the total
1845 height is the height of the tallest window, and the width is the
1846 x we finally reached, corrected by the x we started with. */
1847 if (in_horz_combination_p
)
1849 total
.width
= x
- x0
;
1850 total
.height
= hmax
;
1855 total
.height
= y
- y0
;
1862 /* Allocate window matrices for window-based redisplay. W is the
1863 window whose matrices must be allocated/reallocated. CH_DIM is the
1864 size of the smallest character that could potentially be used on W. */
1867 allocate_matrices_for_window_redisplay (w
, ch_dim
)
1871 struct frame
*f
= XFRAME (w
->frame
);
1875 if (!NILP (w
->vchild
))
1876 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
), ch_dim
);
1877 else if (!NILP (w
->hchild
))
1878 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
), ch_dim
);
1881 /* W is a leaf window. */
1882 int window_pixel_width
= XFLOATINT (w
->width
) * CANON_X_UNIT (f
);
1883 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1886 /* If matrices are not yet allocated, allocate them now. */
1887 if (w
->desired_matrix
== NULL
)
1889 w
->desired_matrix
= new_glyph_matrix (NULL
);
1890 w
->current_matrix
= new_glyph_matrix (NULL
);
1893 /* Compute number of glyphs needed in a glyph row. */
1894 dim
.width
= (((window_pixel_width
+ ch_dim
.width
- 1)
1896 /* 2 partially visible columns in the text area. */
1898 /* One partially visible column at the right
1899 edge of each marginal area. */
1902 /* Compute number of glyph rows needed. */
1903 dim
.height
= (((window_pixel_height
+ ch_dim
.height
- 1)
1905 /* One partially visible line at the top and
1906 bottom of the window. */
1908 /* 2 for top and mode line. */
1911 /* Change matrices. */
1912 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1913 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1916 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1921 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1922 do it for all frames; otherwise do it just for the given frame.
1923 This function must be called when a new frame is created, its size
1924 changes, or its window configuration changes. */
1930 /* Block input so that expose events and other events that access
1931 glyph matrices are not processed while we are changing them. */
1935 adjust_frame_glyphs (f
);
1938 Lisp_Object tail
, lisp_frame
;
1940 FOR_EACH_FRAME (tail
, lisp_frame
)
1941 adjust_frame_glyphs (XFRAME (lisp_frame
));
1948 /* Adjust frame glyphs when Emacs is initialized.
1950 To be called from init_display.
1952 We need a glyph matrix because redraw will happen soon.
1953 Unfortunately, window sizes on selected_frame are not yet set to
1954 meaningful values. I believe we can assume that there are only two
1955 windows on the frame---the mini-buffer and the root window. Frame
1956 height and width seem to be correct so far. So, set the sizes of
1957 windows to estimated values. */
1960 adjust_frame_glyphs_initially ()
1962 struct frame
*sf
= SELECTED_FRAME ();
1963 struct window
*root
= XWINDOW (sf
->root_window
);
1964 struct window
*mini
= XWINDOW (root
->next
);
1965 int frame_height
= FRAME_HEIGHT (sf
);
1966 int frame_width
= FRAME_WIDTH (sf
);
1967 int top_margin
= FRAME_TOP_MARGIN (sf
);
1969 /* Do it for the root window. */
1970 XSETFASTINT (root
->top
, top_margin
);
1971 XSETFASTINT (root
->width
, frame_width
);
1972 set_window_height (sf
->root_window
, frame_height
- 1 - top_margin
, 0);
1974 /* Do it for the mini-buffer window. */
1975 XSETFASTINT (mini
->top
, frame_height
- 1);
1976 XSETFASTINT (mini
->width
, frame_width
);
1977 set_window_height (root
->next
, 1, 0);
1979 adjust_frame_glyphs (sf
);
1980 glyphs_initialized_initially_p
= 1;
1984 /* Allocate/reallocate glyph matrices of a single frame F. */
1987 adjust_frame_glyphs (f
)
1990 if (FRAME_WINDOW_P (f
))
1991 adjust_frame_glyphs_for_window_redisplay (f
);
1993 adjust_frame_glyphs_for_frame_redisplay (f
);
1995 /* Don't forget the message buffer and the buffer for
1996 decode_mode_spec. */
1997 adjust_frame_message_buffer (f
);
1998 adjust_decode_mode_spec_buffer (f
);
2000 f
->glyphs_initialized_p
= 1;
2004 /* Allocate/reallocate glyph matrices of a single frame F for
2005 frame-based redisplay. */
2008 adjust_frame_glyphs_for_frame_redisplay (f
)
2012 struct dim matrix_dim
;
2014 int window_change_flags
;
2017 if (!FRAME_LIVE_P (f
))
2020 /* Determine the smallest character in any font for F. On
2021 console windows, all characters have dimension (1, 1). */
2022 ch_dim
.width
= ch_dim
.height
= 1;
2024 top_window_y
= FRAME_TOP_MARGIN (f
);
2026 /* Allocate glyph pool structures if not already done. */
2027 if (f
->desired_pool
== NULL
)
2029 f
->desired_pool
= new_glyph_pool ();
2030 f
->current_pool
= new_glyph_pool ();
2033 /* Allocate frames matrix structures if needed. */
2034 if (f
->desired_matrix
== NULL
)
2036 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2037 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2040 /* Compute window glyph matrices. (This takes the mini-buffer
2041 window into account). The result is the size of the frame glyph
2042 matrix needed. The variable window_change_flags is set to a bit
2043 mask indicating whether new matrices will be allocated or
2044 existing matrices change their size or location within the frame
2046 window_change_flags
= 0;
2048 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2051 &window_change_flags
);
2053 /* Add in menu bar lines, if any. */
2054 matrix_dim
.height
+= top_window_y
;
2056 /* Enlarge pools as necessary. */
2057 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2058 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2060 /* Set up glyph pointers within window matrices. Do this only if
2061 absolutely necessary since it requires a frame redraw. */
2062 if (pool_changed_p
|| window_change_flags
)
2064 /* Do it for window matrices. */
2065 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2066 0, top_window_y
, ch_dim
, 0,
2067 &window_change_flags
);
2069 /* Size of frame matrices must equal size of frame. Note
2070 that we are called for X frames with window widths NOT equal
2071 to the frame width (from CHANGE_FRAME_SIZE_1). */
2072 xassert (matrix_dim
.width
== FRAME_WIDTH (f
)
2073 && matrix_dim
.height
== FRAME_HEIGHT (f
));
2075 /* Resize frame matrices. */
2076 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2077 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2079 /* Since location and size of sub-matrices within the pool may
2080 have changed, and current matrices don't have meaningful
2081 contents anymore, mark the frame garbaged. */
2082 SET_FRAME_GARBAGED (f
);
2087 /* Allocate/reallocate glyph matrices of a single frame F for
2088 window-based redisplay. */
2091 adjust_frame_glyphs_for_window_redisplay (f
)
2097 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2099 /* Get minimum sizes. */
2100 #ifdef HAVE_WINDOW_SYSTEM
2101 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2102 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2104 ch_dim
.width
= ch_dim
.height
= 1;
2107 /* Allocate/reallocate window matrices. */
2108 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)),
2111 /* Allocate/ reallocate matrices of the dummy window used to display
2112 the menu bar under X when no X toolkit support is available. */
2113 #ifndef USE_X_TOOLKIT
2115 /* Allocate a dummy window if not already done. */
2116 if (NILP (f
->menu_bar_window
))
2118 f
->menu_bar_window
= make_window ();
2119 w
= XWINDOW (f
->menu_bar_window
);
2120 XSETFRAME (w
->frame
, f
);
2121 w
->pseudo_window_p
= 1;
2124 w
= XWINDOW (f
->menu_bar_window
);
2126 /* Set window dimensions to frame dimensions and allocate or
2127 adjust glyph matrices of W. */
2128 XSETFASTINT (w
->top
, 0);
2129 XSETFASTINT (w
->left
, 0);
2130 XSETFASTINT (w
->height
, FRAME_MENU_BAR_LINES (f
));
2131 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2132 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2134 #endif /* not USE_X_TOOLKIT */
2136 /* Allocate/ reallocate matrices of the tool bar window. If we
2137 don't have a tool bar window yet, make one. */
2138 if (NILP (f
->tool_bar_window
))
2140 f
->tool_bar_window
= make_window ();
2141 w
= XWINDOW (f
->tool_bar_window
);
2142 XSETFRAME (w
->frame
, f
);
2143 w
->pseudo_window_p
= 1;
2146 w
= XWINDOW (f
->tool_bar_window
);
2148 XSETFASTINT (w
->top
, FRAME_MENU_BAR_LINES (f
));
2149 XSETFASTINT (w
->left
, 0);
2150 XSETFASTINT (w
->height
, FRAME_TOOL_BAR_LINES (f
));
2151 XSETFASTINT (w
->width
, FRAME_WINDOW_WIDTH (f
));
2152 allocate_matrices_for_window_redisplay (w
, ch_dim
);
2156 /* Adjust/ allocate message buffer of frame F.
2158 Note that the message buffer is never freed. Since I could not
2159 find a free in 19.34, I assume that freeing it would be
2160 problematic in some way and don't do it either.
2162 (Implementation note: It should be checked if we can free it
2163 eventually without causing trouble). */
2166 adjust_frame_message_buffer (f
)
2169 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2171 if (FRAME_MESSAGE_BUF (f
))
2173 char *buffer
= FRAME_MESSAGE_BUF (f
);
2174 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2175 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2178 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2182 /* Re-allocate buffer for decode_mode_spec on frame F. */
2185 adjust_decode_mode_spec_buffer (f
)
2188 f
->decode_mode_spec_buffer
2189 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2190 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2195 /**********************************************************************
2196 Freeing Glyph Matrices
2197 **********************************************************************/
2199 /* Free glyph memory for a frame F. F may be null. This function can
2200 be called for the same frame more than once. The root window of
2201 F may be nil when this function is called. This is the case when
2202 the function is called when F is destroyed. */
2208 if (f
&& f
->glyphs_initialized_p
)
2210 /* Block interrupt input so that we don't get surprised by an X
2211 event while we're in an inconsistent state. */
2213 f
->glyphs_initialized_p
= 0;
2215 /* Release window sub-matrices. */
2216 if (!NILP (f
->root_window
))
2217 free_window_matrices (XWINDOW (f
->root_window
));
2219 /* Free the dummy window for menu bars without X toolkit and its
2221 if (!NILP (f
->menu_bar_window
))
2223 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2224 free_glyph_matrix (w
->desired_matrix
);
2225 free_glyph_matrix (w
->current_matrix
);
2226 w
->desired_matrix
= w
->current_matrix
= NULL
;
2227 f
->menu_bar_window
= Qnil
;
2230 /* Free the tool bar window and its glyph matrices. */
2231 if (!NILP (f
->tool_bar_window
))
2233 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2234 free_glyph_matrix (w
->desired_matrix
);
2235 free_glyph_matrix (w
->current_matrix
);
2236 w
->desired_matrix
= w
->current_matrix
= NULL
;
2237 f
->tool_bar_window
= Qnil
;
2240 /* Release frame glyph matrices. Reset fields to zero in
2241 case we are called a second time. */
2242 if (f
->desired_matrix
)
2244 free_glyph_matrix (f
->desired_matrix
);
2245 free_glyph_matrix (f
->current_matrix
);
2246 f
->desired_matrix
= f
->current_matrix
= NULL
;
2249 /* Release glyph pools. */
2250 if (f
->desired_pool
)
2252 free_glyph_pool (f
->desired_pool
);
2253 free_glyph_pool (f
->current_pool
);
2254 f
->desired_pool
= f
->current_pool
= NULL
;
2262 /* Free glyph sub-matrices in the window tree rooted at W. This
2263 function may be called with a null pointer, and it may be called on
2264 the same tree more than once. */
2267 free_window_matrices (w
)
2272 if (!NILP (w
->hchild
))
2273 free_window_matrices (XWINDOW (w
->hchild
));
2274 else if (!NILP (w
->vchild
))
2275 free_window_matrices (XWINDOW (w
->vchild
));
2278 /* This is a leaf window. Free its memory and reset fields
2279 to zero in case this function is called a second time for
2281 free_glyph_matrix (w
->current_matrix
);
2282 free_glyph_matrix (w
->desired_matrix
);
2283 w
->current_matrix
= w
->desired_matrix
= NULL
;
2286 /* Next window on same level. */
2287 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2292 /* Check glyph memory leaks. This function is called from
2293 shut_down_emacs. Note that frames are not destroyed when Emacs
2294 exits. We therefore free all glyph memory for all active frames
2295 explicitly and check that nothing is left allocated. */
2298 check_glyph_memory ()
2300 Lisp_Object tail
, frame
;
2302 /* Free glyph memory for all frames. */
2303 FOR_EACH_FRAME (tail
, frame
)
2304 free_glyphs (XFRAME (frame
));
2306 /* Check that nothing is left allocated. */
2307 if (glyph_matrix_count
)
2309 if (glyph_pool_count
)
2315 /**********************************************************************
2316 Building a Frame Matrix
2317 **********************************************************************/
2319 /* Most of the redisplay code works on glyph matrices attached to
2320 windows. This is a good solution most of the time, but it is not
2321 suitable for terminal code. Terminal output functions cannot rely
2322 on being able to set an arbitrary terminal window. Instead they
2323 must be provided with a view of the whole frame, i.e. the whole
2324 screen. We build such a view by constructing a frame matrix from
2325 window matrices in this section.
2327 Windows that must be updated have their must_be_update_p flag set.
2328 For all such windows, their desired matrix is made part of the
2329 desired frame matrix. For other windows, their current matrix is
2330 made part of the desired frame matrix.
2332 +-----------------+----------------+
2333 | desired | desired |
2335 +-----------------+----------------+
2338 +----------------------------------+
2340 Desired window matrices can be made part of the frame matrix in a
2341 cheap way: We exploit the fact that the desired frame matrix and
2342 desired window matrices share their glyph memory. This is not
2343 possible for current window matrices. Their glyphs are copied to
2344 the desired frame matrix. The latter is equivalent to
2345 preserve_other_columns in the old redisplay.
2347 Used glyphs counters for frame matrix rows are the result of adding
2348 up glyph lengths of the window matrices. A line in the frame
2349 matrix is enabled, if a corresponding line in a window matrix is
2352 After building the desired frame matrix, it will be passed to
2353 terminal code, which will manipulate both the desired and current
2354 frame matrix. Changes applied to the frame's current matrix have
2355 to be visible in current window matrices afterwards, of course.
2357 This problem is solved like this:
2359 1. Window and frame matrices share glyphs. Window matrices are
2360 constructed in a way that their glyph contents ARE the glyph
2361 contents needed in a frame matrix. Thus, any modification of
2362 glyphs done in terminal code will be reflected in window matrices
2365 2. Exchanges of rows in a frame matrix done by terminal code are
2366 intercepted by hook functions so that corresponding row operations
2367 on window matrices can be performed. This is necessary because we
2368 use pointers to glyphs in glyph row structures. To satisfy the
2369 assumption of point 1 above that glyphs are updated implicitly in
2370 window matrices when they are manipulated via the frame matrix,
2371 window and frame matrix must of course agree where to find the
2372 glyphs for their rows. Possible manipulations that must be
2373 mirrored are assignments of rows of the desired frame matrix to the
2374 current frame matrix and scrolling the current frame matrix. */
2376 /* Build frame F's desired matrix from window matrices. Only windows
2377 which have the flag must_be_updated_p set have to be updated. Menu
2378 bar lines of a frame are not covered by window matrices, so make
2379 sure not to touch them in this function. */
2382 build_frame_matrix (f
)
2387 /* F must have a frame matrix when this function is called. */
2388 xassert (!FRAME_WINDOW_P (f
));
2390 /* Clear all rows in the frame matrix covered by window matrices.
2391 Menu bar lines are not covered by windows. */
2392 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2393 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2395 /* Build the matrix by walking the window tree. */
2396 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2397 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2401 /* Walk a window tree, building a frame matrix MATRIX from window
2402 matrices. W is the root of a window tree. */
2405 build_frame_matrix_from_window_tree (matrix
, w
)
2406 struct glyph_matrix
*matrix
;
2411 if (!NILP (w
->hchild
))
2412 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2413 else if (!NILP (w
->vchild
))
2414 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2416 build_frame_matrix_from_leaf_window (matrix
, w
);
2418 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2423 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2424 desired frame matrix built. W is a leaf window whose desired or
2425 current matrix is to be added to FRAME_MATRIX. W's flag
2426 must_be_updated_p determines which matrix it contributes to
2427 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2428 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2429 Adding a desired matrix means setting up used counters and such in
2430 frame rows, while adding a current window matrix to FRAME_MATRIX
2431 means copying glyphs. The latter case corresponds to
2432 preserve_other_columns in the old redisplay. */
2435 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2436 struct glyph_matrix
*frame_matrix
;
2439 struct glyph_matrix
*window_matrix
;
2440 int window_y
, frame_y
;
2441 /* If non-zero, a glyph to insert at the right border of W. */
2442 GLYPH right_border_glyph
= 0;
2444 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2445 if (w
->must_be_updated_p
)
2447 window_matrix
= w
->desired_matrix
;
2449 /* Decide whether we want to add a vertical border glyph. */
2450 if (!WINDOW_RIGHTMOST_P (w
))
2452 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2453 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2454 ? XINT (DISP_BORDER_GLYPH (dp
))
2459 window_matrix
= w
->current_matrix
;
2461 /* For all rows in the window matrix and corresponding rows in the
2464 frame_y
= window_matrix
->matrix_y
;
2465 while (window_y
< window_matrix
->nrows
)
2467 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2468 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2469 int current_row_p
= window_matrix
== w
->current_matrix
;
2471 /* Fill up the frame row with spaces up to the left margin of the
2473 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2475 /* Fill up areas in the window matrix row with spaces. */
2476 fill_up_glyph_row_with_spaces (window_row
);
2478 /* If only part of W's desired matrix has been built, and
2479 window_row wasn't displayed, use the corresponding current
2481 if (window_matrix
== w
->desired_matrix
2482 && !window_row
->enabled_p
)
2484 window_row
= w
->current_matrix
->rows
+ window_y
;
2490 /* Copy window row to frame row. */
2491 bcopy (window_row
->glyphs
[0],
2492 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2493 window_matrix
->matrix_w
* sizeof (struct glyph
));
2497 xassert (window_row
->enabled_p
);
2499 /* Only when a desired row has been displayed, we want
2500 the corresponding frame row to be updated. */
2501 frame_row
->enabled_p
= 1;
2503 /* Maybe insert a vertical border between horizontally adjacent
2505 if (right_border_glyph
)
2507 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2508 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2511 #if 0 /* This shouldn't be necessary. Let's check it. */
2512 /* Due to hooks installed, it normally doesn't happen that
2513 window rows and frame rows of the same matrix are out of
2514 sync, i.e. have a different understanding of where to
2515 find glyphs for the row. The following is a safety-belt
2516 that doesn't cost much and makes absolutely sure that
2517 window and frame matrices are in sync. */
2518 if (!glyph_row_slice_p (window_row
, frame_row
))
2520 /* Find the row in the window being a slice. There
2521 should exist one from program logic. */
2522 struct glyph_row
*slice_row
2523 = find_glyph_row_slice (window_matrix
, frame_matrix
, frame_y
);
2524 xassert (slice_row
!= 0);
2526 /* Exchange glyphs between both window rows. */
2527 swap_glyphs_in_rows (window_row
, slice_row
);
2529 /* Exchange pointers between both rows. */
2530 swap_glyph_pointers (window_row
, slice_row
);
2534 /* Window row window_y must be a slice of frame row
2536 xassert (glyph_row_slice_p (window_row
, frame_row
));
2538 /* If rows are in sync, we don't have to copy glyphs because
2539 frame and window share glyphs. */
2542 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2546 /* Set number of used glyphs in the frame matrix. Since we fill
2547 up with spaces, and visit leaf windows from left to right it
2548 can be done simply. */
2549 frame_row
->used
[TEXT_AREA
]
2550 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2552 /* Or in other flags. */
2553 frame_row
->inverse_p
|= window_row
->inverse_p
;
2562 /* Add spaces to a glyph row ROW in a window matrix.
2564 Each row has the form:
2566 +---------+-----------------------------+------------+
2567 | left | text | right |
2568 +---------+-----------------------------+------------+
2570 Left and right marginal areas are optional. This function adds
2571 spaces to areas so that there are no empty holes between areas.
2572 In other words: If the right area is not empty, the text area
2573 is filled up with spaces up to the right area. If the text area
2574 is not empty, the left area is filled up.
2576 To be called for frame-based redisplay, only. */
2579 fill_up_glyph_row_with_spaces (row
)
2580 struct glyph_row
*row
;
2582 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2583 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2584 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2588 /* Fill area AREA of glyph row ROW with spaces. To be called for
2589 frame-based redisplay only. */
2592 fill_up_glyph_row_area_with_spaces (row
, area
)
2593 struct glyph_row
*row
;
2596 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2598 struct glyph
*end
= row
->glyphs
[area
+ 1];
2599 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2602 *text
++ = space_glyph
;
2603 row
->used
[area
] = text
- row
->glyphs
[area
];
2608 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2609 reached. In frame matrices only one area, TEXT_AREA, is used. */
2612 fill_up_frame_row_with_spaces (row
, upto
)
2613 struct glyph_row
*row
;
2616 int i
= row
->used
[TEXT_AREA
];
2617 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2620 glyph
[i
++] = space_glyph
;
2622 row
->used
[TEXT_AREA
] = i
;
2627 /**********************************************************************
2628 Mirroring operations on frame matrices in window matrices
2629 **********************************************************************/
2631 /* Set frame being updated via frame-based redisplay to F. This
2632 function must be called before updates to make explicit that we are
2633 working on frame matrices or not. */
2636 set_frame_matrix_frame (f
)
2639 frame_matrix_frame
= f
;
2643 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2644 DESIRED_MATRIX is the desired matrix corresponding to
2645 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2646 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2647 frame_matrix_frame is non-null, this indicates that the exchange is
2648 done in frame matrices, and that we have to perform analogous
2649 operations in window matrices of frame_matrix_frame. */
2652 make_current (desired_matrix
, current_matrix
, row
)
2653 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2656 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2657 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2658 int mouse_face_p
= current_row
->mouse_face_p
;
2660 /* Do current_row = desired_row. This exchanges glyph pointers
2661 between both rows, and does a structure assignment otherwise. */
2662 assign_row (current_row
, desired_row
);
2664 /* Enable current_row to mark it as valid. */
2665 current_row
->enabled_p
= 1;
2666 current_row
->mouse_face_p
= mouse_face_p
;
2668 /* If we are called on frame matrices, perform analogous operations
2669 for window matrices. */
2670 if (frame_matrix_frame
)
2671 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2675 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2676 W's frame which has been made current (by swapping pointers between
2677 current and desired matrix). Perform analogous operations in the
2678 matrices of leaf windows in the window tree rooted at W. */
2681 mirror_make_current (w
, frame_row
)
2687 if (!NILP (w
->hchild
))
2688 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2689 else if (!NILP (w
->vchild
))
2690 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2693 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2694 here because the checks performed in debug mode there
2695 will not allow the conversion. */
2696 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2698 /* If FRAME_ROW is within W, assign the desired row to the
2699 current row (exchanging glyph pointers). */
2700 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2702 struct glyph_row
*current_row
2703 = MATRIX_ROW (w
->current_matrix
, row
);
2704 struct glyph_row
*desired_row
2705 = MATRIX_ROW (w
->desired_matrix
, row
);
2707 if (desired_row
->enabled_p
)
2708 assign_row (current_row
, desired_row
);
2710 swap_glyph_pointers (desired_row
, current_row
);
2711 current_row
->enabled_p
= 1;
2715 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2720 /* Perform row dance after scrolling. We are working on the range of
2721 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2722 including) in MATRIX. COPY_FROM is a vector containing, for each
2723 row I in the range 0 <= I < NLINES, the index of the original line
2724 to move to I. This index is relative to the row range, i.e. 0 <=
2725 index < NLINES. RETAINED_P is a vector containing zero for each
2726 row 0 <= I < NLINES which is empty.
2728 This function is called from do_scrolling and do_direct_scrolling. */
2731 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2733 struct glyph_matrix
*matrix
;
2734 int unchanged_at_top
, nlines
;
2738 /* A copy of original rows. */
2739 struct glyph_row
*old_rows
;
2741 /* Rows to assign to. */
2742 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2746 /* Make a copy of the original rows. */
2747 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2748 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2750 /* Assign new rows, maybe clear lines. */
2751 for (i
= 0; i
< nlines
; ++i
)
2753 int enabled_before_p
= new_rows
[i
].enabled_p
;
2755 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2756 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2757 new_rows
[i
] = old_rows
[copy_from
[i
]];
2758 new_rows
[i
].enabled_p
= enabled_before_p
;
2760 /* RETAINED_P is zero for empty lines. */
2761 if (!retained_p
[copy_from
[i
]])
2762 new_rows
[i
].enabled_p
= 0;
2765 /* Do the same for window matrices, if MATRIX Is a frame matrix. */
2766 if (frame_matrix_frame
)
2767 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2768 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2772 /* Synchronize glyph pointers in the current matrix of window W with
2773 the current frame matrix. W must be full-width, and be on a tty
2777 sync_window_with_frame_matrix_rows (w
)
2780 struct frame
*f
= XFRAME (w
->frame
);
2781 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2783 /* Preconditions: W must be a leaf window and full-width. Its frame
2784 must have a frame matrix. */
2785 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2786 xassert (WINDOW_FULL_WIDTH_P (w
));
2787 xassert (!FRAME_WINDOW_P (f
));
2789 /* If W is a full-width window, glyph pointers in W's current matrix
2790 have, by definition, to be the same as glyph pointers in the
2791 corresponding frame matrix. */
2792 window_row
= w
->current_matrix
->rows
;
2793 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2794 frame_row
= f
->current_matrix
->rows
+ XFASTINT (w
->top
);
2795 while (window_row
< window_row_end
)
2799 for (area
= LEFT_MARGIN_AREA
; area
<= LAST_AREA
; ++area
)
2800 window_row
->glyphs
[area
] = frame_row
->glyphs
[area
];
2802 ++window_row
, ++frame_row
;
2807 /* Return the window in the window tree rooted in W containing frame
2808 row ROW. Value is null if none is found. */
2811 frame_row_to_window (w
, row
)
2815 struct window
*found
= NULL
;
2819 if (!NILP (w
->hchild
))
2820 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
2821 else if (!NILP (w
->vchild
))
2822 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
2823 else if (row
>= XFASTINT (w
->top
)
2824 && row
< XFASTINT (w
->top
) + XFASTINT (w
->height
))
2827 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2834 /* Perform a line dance in the window tree rooted at W, after
2835 scrolling a frame matrix in mirrored_line_dance.
2837 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
2838 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
2839 COPY_FROM is a vector containing, for each row I in the range 0 <=
2840 I < NLINES, the index of the original line to move to I. This
2841 index is relative to the row range, i.e. 0 <= index < NLINES.
2842 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
2846 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
2848 int unchanged_at_top
, nlines
;
2854 if (!NILP (w
->hchild
))
2855 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
2856 nlines
, copy_from
, retained_p
);
2857 else if (!NILP (w
->vchild
))
2858 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
2859 nlines
, copy_from
, retained_p
);
2862 /* W is a leaf window, and we are working on its current
2864 struct glyph_matrix
*m
= w
->current_matrix
;
2866 struct glyph_row
*old_rows
;
2868 /* Make a copy of the original rows of matrix m. */
2869 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
2870 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
2872 for (i
= 0; i
< nlines
; ++i
)
2874 /* Frame relative line assigned to. */
2875 int frame_to
= i
+ unchanged_at_top
;
2877 /* Frame relative line assigned. */
2878 int frame_from
= copy_from
[i
] + unchanged_at_top
;
2880 /* Window relative line assigned to. */
2881 int window_to
= frame_to
- m
->matrix_y
;
2883 /* Window relative line assigned. */
2884 int window_from
= frame_from
- m
->matrix_y
;
2886 /* Is assigned line inside window? */
2887 int from_inside_window_p
2888 = window_from
>= 0 && window_from
< m
->matrix_h
;
2890 /* Is assigned to line inside window? */
2891 int to_inside_window_p
2892 = window_to
>= 0 && window_to
< m
->matrix_h
;
2894 if (from_inside_window_p
&& to_inside_window_p
)
2896 /* Enabled setting before assignment. */
2897 int enabled_before_p
;
2899 /* Do the assignment. The enabled_p flag is saved
2900 over the assignment because the old redisplay did
2902 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
2903 m
->rows
[window_to
] = old_rows
[window_from
];
2904 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
2906 /* If frame line is empty, window line is empty, too. */
2907 if (!retained_p
[copy_from
[i
]])
2908 m
->rows
[window_to
].enabled_p
= 0;
2910 else if (to_inside_window_p
)
2912 /* A copy between windows. This is an infrequent
2913 case not worth optimizing. */
2914 struct frame
*f
= XFRAME (w
->frame
);
2915 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
2917 struct glyph_matrix
*m2
;
2920 w2
= frame_row_to_window (root
, frame_to
);
2921 m2
= w2
->current_matrix
;
2922 m2_from
= frame_from
- m2
->matrix_y
;
2923 copy_row_except_pointers (m
->rows
+ window_to
,
2924 m2
->rows
+ m2_from
);
2926 /* If frame line is empty, window line is empty, too. */
2927 if (!retained_p
[copy_from
[i
]])
2928 m
->rows
[window_to
].enabled_p
= 0;
2931 else if (from_inside_window_p
)
2935 /* If there was a copy between windows, make sure glyph
2936 pointers are in sync with the frame matrix. */
2938 sync_window_with_frame_matrix_rows (w
);
2940 /* Check that no pointers are lost. */
2944 /* Next window on same level. */
2945 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2952 /* Check that window and frame matrices agree about their
2953 understanding where glyphs of the rows are to find. For each
2954 window in the window tree rooted at W, check that rows in the
2955 matrices of leaf window agree with their frame matrices about
2959 check_window_matrix_pointers (w
)
2964 if (!NILP (w
->hchild
))
2965 check_window_matrix_pointers (XWINDOW (w
->hchild
));
2966 else if (!NILP (w
->vchild
))
2967 check_window_matrix_pointers (XWINDOW (w
->vchild
));
2970 struct frame
*f
= XFRAME (w
->frame
);
2971 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
2972 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
2975 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2980 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
2981 a window and FRAME_MATRIX is the corresponding frame matrix. For
2982 each row in WINDOW_MATRIX check that it's a slice of the
2983 corresponding frame row. If it isn't, abort. */
2986 check_matrix_pointers (window_matrix
, frame_matrix
)
2987 struct glyph_matrix
*window_matrix
, *frame_matrix
;
2989 /* Row number in WINDOW_MATRIX. */
2992 /* Row number corresponding to I in FRAME_MATRIX. */
2993 int j
= window_matrix
->matrix_y
;
2995 /* For all rows check that the row in the window matrix is a
2996 slice of the row in the frame matrix. If it isn't we didn't
2997 mirror an operation on the frame matrix correctly. */
2998 while (i
< window_matrix
->nrows
)
3000 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3001 frame_matrix
->rows
+ j
))
3007 #endif /* GLYPH_DEBUG != 0 */
3011 /**********************************************************************
3012 VPOS and HPOS translations
3013 **********************************************************************/
3017 /* Translate vertical position VPOS which is relative to window W to a
3018 vertical position relative to W's frame. */
3021 window_to_frame_vpos (w
, vpos
)
3025 struct frame
*f
= XFRAME (w
->frame
);
3027 xassert (!FRAME_WINDOW_P (f
));
3028 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3029 vpos
+= XFASTINT (w
->top
);
3030 xassert (vpos
>= 0 && vpos
<= FRAME_HEIGHT (f
));
3035 /* Translate horizontal position HPOS which is relative to window W to
3036 a vertical position relative to W's frame. */
3039 window_to_frame_hpos (w
, hpos
)
3043 struct frame
*f
= XFRAME (w
->frame
);
3045 xassert (!FRAME_WINDOW_P (f
));
3046 hpos
+= XFASTINT (w
->left
);
3050 #endif /* GLYPH_DEBUG */
3054 /**********************************************************************
3056 **********************************************************************/
3058 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3059 "Clear frame FRAME and output again what is supposed to appear on it.")
3065 CHECK_LIVE_FRAME (frame
, 0);
3068 /* Ignore redraw requests, if frame has no glyphs yet.
3069 (Implementation note: It still has to be checked why we are
3070 called so early here). */
3071 if (!glyphs_initialized_initially_p
)
3075 if (FRAME_MSDOS_P (f
))
3076 set_terminal_modes ();
3078 clear_current_matrices (f
);
3081 windows_or_buffers_changed
++;
3082 /* Mark all windows as inaccurate, so that every window will have
3083 its redisplay done. */
3084 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3085 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3091 /* Redraw frame F. This is nothing more than a call to the Lisp
3092 function redraw-frame. */
3099 XSETFRAME (frame
, f
);
3100 Fredraw_frame (frame
);
3104 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3105 "Clear and redisplay all visible frames.")
3108 Lisp_Object tail
, frame
;
3110 FOR_EACH_FRAME (tail
, frame
)
3111 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3112 Fredraw_frame (frame
);
3118 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3119 visible frames marked as garbaged. */
3122 redraw_garbaged_frames ()
3124 Lisp_Object tail
, frame
;
3126 FOR_EACH_FRAME (tail
, frame
)
3127 if (FRAME_VISIBLE_P (XFRAME (frame
))
3128 && FRAME_GARBAGED_P (XFRAME (frame
)))
3129 Fredraw_frame (frame
);
3134 /***********************************************************************
3136 ***********************************************************************/
3138 /* Try to update display and current glyph matrix directly.
3140 This function is called after a character G has been inserted into
3141 current_buffer. It tries to update the current glyph matrix and
3142 perform appropriate screen output to reflect the insertion. If it
3143 succeeds, the global flag redisplay_performed_directly_p will be
3144 set to 1, and thereby prevent the more costly general redisplay
3145 from running (see redisplay_internal).
3147 This function is not called for `hairy' character insertions.
3148 In particular, it is not called when after or before change
3149 functions exist, like they are used by font-lock. See keyboard.c
3150 for details where this function is called. */
3153 direct_output_for_insert (g
)
3156 register struct frame
*f
= SELECTED_FRAME ();
3157 struct window
*w
= XWINDOW (selected_window
);
3159 struct glyph_row
*glyph_row
;
3160 struct glyph
*glyphs
, *glyph
, *end
;
3162 /* Non-null means that Redisplay of W is based on window matrices. */
3163 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3164 /* Non-null means we are in overwrite mode. */
3165 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3167 struct text_pos pos
;
3168 int delta
, delta_bytes
;
3170 /* Not done directly. */
3171 redisplay_performed_directly_p
= 0;
3173 /* Quickly give up for some common cases. */
3174 if (cursor_in_echo_area
3175 /* Give up if fonts have changed. */
3177 /* Give up if face attributes have been changed. */
3178 || face_change_count
3179 /* Give up if cursor position not really known. */
3180 || !display_completed
3181 /* Give up if buffer appears in two places. */
3182 || buffer_shared
> 1
3183 /* Give up if w is mini-buffer and a message is being displayed there */
3184 || (MINI_WINDOW_P (w
) && !NILP (echo_area_buffer
[0]))
3185 /* Give up for hscrolled mini-buffer because display of the prompt
3186 is handled specially there (see display_line). */
3187 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3188 /* Give up if overwriting in the middle of a line. */
3191 && FETCH_BYTE (PT
) != '\n')
3192 /* Give up for tabs and line ends. */
3196 /* Give up if unable to display the cursor in the window. */
3197 || w
->cursor
.vpos
< 0
3198 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3199 /* Can't do it in a continued line because continuation
3200 lines would change. */
3201 (glyph_row
->continued_p
3202 /* Can't use this method if the line overlaps others or is
3203 overlapped by others because these other lines would
3204 have to be redisplayed. */
3205 || glyph_row
->overlapping_p
3206 || glyph_row
->overlapped_p
))
3207 /* Can't do it for partial width windows on terminal frames
3208 because we can't clear to eol in such a window. */
3209 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3212 /* Set up a display iterator structure for W. Glyphs will be
3213 produced in scratch_glyph_row. Current position is W's cursor
3215 clear_glyph_row (&scratch_glyph_row
);
3216 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3217 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3218 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3221 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3222 if (glyph_row
->mouse_face_p
)
3225 /* Give up if highlighting trailing whitespace and we have trailing
3226 whitespace in glyph_row. We would have to remove the trailing
3227 whitespace face in that case. */
3228 if (!NILP (Vshow_trailing_whitespace
)
3229 && glyph_row
->used
[TEXT_AREA
])
3233 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3234 if (last
->type
== STRETCH_GLYPH
3235 || (last
->type
== CHAR_GLYPH
3236 && last
->u
.ch
== ' '))
3240 /* Give up if there are overlay strings at pos. This would fail
3241 if the overlay string has newlines in it. */
3242 if (STRINGP (it
.string
))
3245 it
.hpos
= w
->cursor
.hpos
;
3246 it
.vpos
= w
->cursor
.vpos
;
3247 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3248 it
.current_y
= w
->cursor
.y
;
3249 it
.end_charpos
= PT
;
3250 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3252 /* More than one display element may be returned for PT - 1 if
3253 (i) it's a control character which is translated into `\003' or
3254 `^C', or (ii) it has a display table entry, or (iii) it's a
3255 combination of both. */
3256 delta
= delta_bytes
= 0;
3257 while (get_next_display_element (&it
))
3259 PRODUCE_GLYPHS (&it
);
3261 /* Give up if glyph doesn't fit completely on the line. */
3262 if (it
.current_x
>= it
.last_visible_x
)
3265 /* Give up if new glyph has different ascent or descent than
3266 the original row, or if it is not a character glyph. */
3267 if (glyph_row
->ascent
!= it
.ascent
3268 || glyph_row
->height
!= it
.ascent
+ it
.descent
3269 || glyph_row
->phys_ascent
!= it
.phys_ascent
3270 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3271 || it
.what
!= IT_CHARACTER
)
3275 delta_bytes
+= it
.len
;
3276 set_iterator_to_next (&it
, 1);
3279 /* Give up if we hit the right edge of the window. We would have
3280 to insert truncation or continuation glyphs. */
3281 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3282 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3285 /* Give up if there is a \t following in the line. */
3287 it2
.end_charpos
= ZV
;
3288 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3289 while (get_next_display_element (&it2
)
3290 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3294 set_iterator_to_next (&it2
, 1);
3297 /* Number of new glyphs produced. */
3298 n
= it
.glyph_row
->used
[TEXT_AREA
];
3300 /* Start and end of glyphs in original row. */
3301 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3302 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3304 /* Make room for new glyphs, then insert them. */
3305 xassert (end
- glyphs
- n
>= 0);
3306 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3307 (end
- glyphs
- n
) * sizeof (*end
));
3308 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3309 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3310 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3312 /* Compute new line width. */
3313 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3314 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3315 glyph_row
->pixel_width
= glyph_row
->x
;
3318 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3322 /* Increment buffer positions for glyphs following the newly
3324 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3325 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3326 glyph
->charpos
+= delta
;
3328 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3330 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3331 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3334 /* Adjust positions in lines following the one we are in. */
3335 increment_matrix_positions (w
->current_matrix
,
3337 w
->current_matrix
->nrows
,
3338 delta
, delta_bytes
);
3340 glyph_row
->contains_overlapping_glyphs_p
3341 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3343 glyph_row
->displays_text_p
= 1;
3344 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3345 XFASTINT (w
->window_end_vpos
)));
3347 if (!NILP (Vshow_trailing_whitespace
))
3348 highlight_trailing_whitespace (it
.f
, glyph_row
);
3350 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3351 In the middle, we have to insert glyphs. Note that this is now
3352 implemented for X frames. The implementation uses updated_window
3354 updated_row
= glyph_row
;
3358 rif
->update_window_begin_hook (w
);
3360 if (glyphs
== end
- n
)
3361 rif
->write_glyphs (glyphs
, n
);
3363 rif
->insert_glyphs (glyphs
, n
);
3367 if (glyphs
== end
- n
)
3368 write_glyphs (glyphs
, n
);
3370 insert_glyphs (glyphs
, n
);
3373 w
->cursor
.hpos
+= n
;
3374 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3375 xassert (w
->cursor
.hpos
>= 0
3376 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3378 /* How to set the cursor differs depending on whether we are
3379 using a frame matrix or a window matrix. Note that when
3380 a frame matrix is used, cursor_to expects frame coordinates,
3381 and the X and Y parameters are not used. */
3382 if (window_redisplay_p
)
3383 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3384 w
->cursor
.y
, w
->cursor
.x
);
3388 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3389 + (INTEGERP (w
->left_margin_width
)
3390 ? XFASTINT (w
->left_margin_width
)
3392 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3397 rif
->update_window_end_hook (w
, 1, 0);
3402 TRACE ((stderr
, "direct output for insert\n"));
3404 UNCHANGED_MODIFIED
= MODIFF
;
3405 BEG_UNCHANGED
= GPT
- BEG
;
3406 XSETFASTINT (w
->last_point
, PT
);
3407 w
->last_cursor
= w
->cursor
;
3408 XSETFASTINT (w
->last_modified
, MODIFF
);
3409 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
3411 redisplay_performed_directly_p
= 1;
3416 /* Perform a direct display update for moving PT by N positions
3417 left or right. N < 0 means a movement backwards. This function
3418 is currently only called for N == 1 or N == -1. */
3421 direct_output_forward_char (n
)
3424 struct frame
*f
= SELECTED_FRAME ();
3425 struct window
*w
= XWINDOW (selected_window
);
3426 struct glyph_row
*row
;
3428 /* Give up if point moved out of or into a composition. */
3429 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3430 current_buffer
, PT
))
3433 /* Give up if face attributes have been changed. */
3434 if (face_change_count
)
3437 /* Give up if current matrix is not up to date or we are
3438 displaying a message. */
3439 if (!display_completed
|| cursor_in_echo_area
)
3442 /* Give up if the buffer's direction is reversed. */
3443 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3446 /* Can't use direct output if highlighting a region. */
3447 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3450 /* Can't use direct output if highlighting trailing whitespace. */
3451 if (!NILP (Vshow_trailing_whitespace
))
3454 /* Give up if we are showing a message or just cleared the message
3455 because we might need to resize the echo area window. */
3456 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3459 /* Give up if currently displaying a message instead of the
3460 minibuffer contents. */
3461 if (XWINDOW (minibuf_window
) == w
3462 && EQ (minibuf_window
, echo_area_window
))
3465 /* Give up if we don't know where the cursor is. */
3466 if (w
->cursor
.vpos
< 0)
3469 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3471 /* Give up if PT is outside of the last known cursor row. */
3472 if (PT
<= MATRIX_ROW_START_BYTEPOS (row
)
3473 || PT
>= MATRIX_ROW_END_BYTEPOS (row
))
3476 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3478 w
->last_cursor
= w
->cursor
;
3479 XSETFASTINT (w
->last_point
, PT
);
3481 xassert (w
->cursor
.hpos
>= 0
3482 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3484 if (FRAME_WINDOW_P (f
))
3485 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3486 w
->cursor
.y
, w
->cursor
.x
);
3490 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3491 + (INTEGERP (w
->left_margin_width
)
3492 ? XFASTINT (w
->left_margin_width
)
3494 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3499 redisplay_performed_directly_p
= 1;
3505 /***********************************************************************
3507 ***********************************************************************/
3509 /* Update frame F based on the data in desired matrices.
3511 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3512 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3515 Value is non-zero if redisplay was stopped due to pending input. */
3518 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3521 int inhibit_hairy_id_p
;
3523 /* 1 means display has been paused because of pending input. */
3525 struct window
*root_window
= XWINDOW (f
->root_window
);
3527 if (FRAME_WINDOW_P (f
))
3529 /* We are working on window matrix basis. All windows whose
3530 flag must_be_updated_p is set have to be updated. */
3532 /* Record that we are not working on frame matrices. */
3533 set_frame_matrix_frame (NULL
);
3535 /* Update all windows in the window tree of F, maybe stopping
3536 when pending input is detected. */
3539 /* Update the menu bar on X frames that don't have toolkit
3541 if (WINDOWP (f
->menu_bar_window
))
3542 update_window (XWINDOW (f
->menu_bar_window
), 1);
3544 /* Update the tool-bar window, if present. */
3545 if (WINDOWP (f
->tool_bar_window
))
3548 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3550 /* Update tool-bar window. */
3551 if (w
->must_be_updated_p
)
3553 update_window (w
, 1);
3554 w
->must_be_updated_p
= 0;
3556 /* Swap tool-bar strings. We swap because we want to
3558 tem
= f
->current_tool_bar_string
;
3559 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3560 f
->desired_tool_bar_string
= tem
;
3565 /* Update windows. */
3566 paused_p
= update_window_tree (root_window
, force_p
);
3569 #if 0 /* This flush is a performance bottleneck under X,
3570 and it doesn't seem to be necessary anyway. */
3571 rif
->flush_display (f
);
3576 /* We are working on frame matrix basis. Set the frame on whose
3577 frame matrix we operate. */
3578 set_frame_matrix_frame (f
);
3580 /* Build F's desired matrix from window matrices. */
3581 build_frame_matrix (f
);
3583 /* Update the display */
3585 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3589 fflush (termscript
);
3592 /* Check window matrices for lost pointers. */
3593 IF_DEBUG (check_window_matrix_pointers (root_window
));
3596 /* Reset flags indicating that a window should be updated. */
3597 set_window_update_flags (root_window
, 0);
3599 display_completed
= !paused_p
;
3605 /************************************************************************
3606 Window-based updates
3607 ************************************************************************/
3609 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3610 don't stop updating when input is pending. */
3613 update_window_tree (w
, force_p
)
3619 while (w
&& !paused_p
)
3621 if (!NILP (w
->hchild
))
3622 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3623 else if (!NILP (w
->vchild
))
3624 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3625 else if (w
->must_be_updated_p
)
3626 paused_p
|= update_window (w
, force_p
);
3628 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3635 /* Update window W if its flag must_be_updated_p is non-zero. If
3636 FORCE_P is non-zero, don't stop updating if input is pending. */
3639 update_single_window (w
, force_p
)
3643 if (w
->must_be_updated_p
)
3645 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3647 /* Record that this is not a frame-based redisplay. */
3648 set_frame_matrix_frame (NULL
);
3652 update_window (w
, force_p
);
3655 /* Reset flag in W. */
3656 w
->must_be_updated_p
= 0;
3661 /* Redraw lines from the current matrix of window W that are
3662 overlapped by other rows. YB is bottom-most y-position in W. */
3665 redraw_overlapped_rows (w
, yb
)
3671 /* If rows overlapping others have been changed, the rows being
3672 overlapped have to be redrawn. This won't draw lines that have
3673 already been drawn in update_window_line because overlapped_p in
3674 desired rows is 0, so after row assignment overlapped_p in
3675 current rows is 0. */
3676 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3678 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3680 if (!row
->enabled_p
)
3682 else if (row
->mode_line_p
)
3685 if (row
->overlapped_p
)
3687 enum glyph_row_area area
;
3689 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3692 updated_area
= area
;
3693 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3694 if (row
->used
[area
])
3695 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3696 rif
->clear_end_of_line (-1);
3699 row
->overlapped_p
= 0;
3702 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3708 /* Redraw lines from the current matrix of window W that overlap
3709 others. YB is bottom-most y-position in W. */
3712 redraw_overlapping_rows (w
, yb
)
3717 struct glyph_row
*row
;
3719 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3721 row
= w
->current_matrix
->rows
+ i
;
3723 if (!row
->enabled_p
)
3725 else if (row
->mode_line_p
)
3728 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3730 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3732 if (row
->used
[LEFT_MARGIN_AREA
])
3733 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3735 if (row
->used
[TEXT_AREA
])
3736 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3738 if (row
->used
[RIGHT_MARGIN_AREA
])
3739 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3741 /* Record in neighbor rows that ROW overwrites part of their
3743 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
3744 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3745 if ((row
->phys_height
- row
->phys_ascent
3746 > row
->height
- row
->ascent
)
3748 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3757 /* Update display of window W. FORCE_P non-zero means that we should
3758 not stop when detecting pending input. */
3761 update_window (w
, force_p
)
3765 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3767 int preempt_count
= baud_rate
/ 2400 + 1;
3768 extern int input_pending
;
3770 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3771 extern struct frame
*updating_frame
;
3774 /* Check that W's frame doesn't have glyph matrices. */
3775 xassert (FRAME_WINDOW_P (f
));
3776 xassert (updating_frame
!= NULL
);
3778 /* Check pending input the first time so that we can quickly return. */
3779 if (redisplay_dont_pause
)
3782 detect_input_pending ();
3784 /* If forced to complete the update, or if no input is pending, do
3786 if (force_p
|| !input_pending
)
3788 struct glyph_row
*row
, *end
;
3789 struct glyph_row
*mode_line_row
;
3790 struct glyph_row
*header_line_row
= NULL
;
3791 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0;
3793 rif
->update_window_begin_hook (w
);
3794 yb
= window_text_bottom_y (w
);
3796 /* If window has a top line, update it before everything else.
3797 Adjust y-positions of other rows by the top line height. */
3798 row
= desired_matrix
->rows
;
3799 end
= row
+ desired_matrix
->nrows
- 1;
3800 if (row
->mode_line_p
)
3801 header_line_row
= row
++;
3803 /* Update the mode line, if necessary. */
3804 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3805 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3807 mode_line_row
->y
= yb
;
3808 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3810 &mouse_face_overwritten_p
);
3814 /* Find first enabled row. Optimizations in redisplay_internal
3815 may lead to an update with only one row enabled. There may
3816 be also completely empty matrices. */
3817 while (row
< end
&& !row
->enabled_p
)
3820 /* Try reusing part of the display by copying. */
3821 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3823 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3826 /* All rows were found to be equal. */
3835 /* Update the top mode line after scrolling because a new top
3836 line would otherwise overwrite lines at the top of the window
3837 that can be scrolled. */
3838 if (header_line_row
&& header_line_row
->enabled_p
)
3840 header_line_row
->y
= 0;
3841 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3845 /* Update the rest of the lines. */
3846 for (; row
< end
&& (force_p
|| !input_pending
); ++row
)
3849 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3852 /* We'll Have to play a little bit with when to
3853 detect_input_pending. If it's done too often,
3854 scrolling large windows with repeated scroll-up
3855 commands will too quickly pause redisplay. */
3856 if (!force_p
&& vpos
% preempt_count
== 0)
3857 detect_input_pending ();
3859 changed_p
|= update_window_line (w
, vpos
,
3860 &mouse_face_overwritten_p
);
3862 /* Mark all rows below the last visible one in the current
3863 matrix as invalid. This is necessary because of
3864 variable line heights. Consider the case of three
3865 successive redisplays, where the first displays 5
3866 lines, the second 3 lines, and the third 5 lines again.
3867 If the second redisplay wouldn't mark rows in the
3868 current matrix invalid, the third redisplay might be
3869 tempted to optimize redisplay based on lines displayed
3870 in the first redisplay. */
3871 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3872 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3873 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3876 /* Was display preempted? */
3877 paused_p
= row
< end
;
3881 /* Fix the appearance of overlapping(overlapped rows. */
3882 if (!paused_p
&& !w
->pseudo_window_p
)
3884 if (changed_p
&& rif
->fix_overlapping_area
)
3886 redraw_overlapped_rows (w
, yb
);
3887 redraw_overlapping_rows (w
, yb
);
3890 /* Make cursor visible at cursor position of W. */
3891 set_window_cursor_after_update (w
);
3893 #if 0 /* Check that current matrix invariants are satisfied. This is
3894 for debugging only. See the comment of check_matrix_invariants. */
3895 IF_DEBUG (check_matrix_invariants (w
));
3900 /* Remember the redisplay method used to display the matrix. */
3901 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3904 /* End of update of window W. */
3905 rif
->update_window_end_hook (w
, 1, mouse_face_overwritten_p
);
3910 clear_glyph_matrix (desired_matrix
);
3916 /* Update the display of area AREA in window W, row number VPOS.
3917 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3920 update_marginal_area (w
, area
, vpos
)
3924 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3926 /* Let functions in xterm.c know what area subsequent X positions
3927 will be relative to. */
3928 updated_area
= area
;
3930 /* Set cursor to start of glyphs, write them, and clear to the end
3931 of the area. I don't think that something more sophisticated is
3932 necessary here, since marginal areas will not be the default. */
3933 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3934 if (desired_row
->used
[area
])
3935 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3936 rif
->clear_end_of_line (-1);
3940 /* Update the display of the text area of row VPOS in window W.
3941 Value is non-zero if display has changed. */
3944 update_text_area (w
, vpos
)
3948 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3949 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3952 /* Let functions in xterm.c know what area subsequent X positions
3953 will be relative to. */
3954 updated_area
= TEXT_AREA
;
3956 /* If rows are at different X or Y, or rows have different height,
3957 or the current row is marked invalid, write the entire line. */
3958 if (!current_row
->enabled_p
3959 || desired_row
->y
!= current_row
->y
3960 || desired_row
->ascent
!= current_row
->ascent
3961 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3962 || desired_row
->phys_height
!= current_row
->phys_height
3963 || desired_row
->visible_height
!= current_row
->visible_height
3964 || current_row
->overlapped_p
3965 || current_row
->mouse_face_p
3966 || current_row
->x
!= desired_row
->x
)
3968 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3970 if (desired_row
->used
[TEXT_AREA
])
3971 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3972 desired_row
->used
[TEXT_AREA
]);
3974 /* Clear to end of window. */
3975 rif
->clear_end_of_line (-1);
3981 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3982 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3983 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3985 /* If the desired row extends its face to the text area end,
3986 make sure we write at least one glyph, so that the face
3987 extension actually takes place. */
3988 int desired_stop_pos
= (desired_row
->used
[TEXT_AREA
]
3989 - (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3992 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4000 /* Skip over glyphs that both rows have in common. These
4001 don't have to be written. We can't skip if the last
4002 current glyph overlaps the glyph to its right. For
4003 example, consider a current row of `if ' with the `f' in
4004 Courier bold so that it overlaps the ` ' to its right.
4005 If the desired row is ` ', we would skip over the space
4006 after the `if' and there would remain a pixel from the
4007 `f' on the screen. */
4008 if (overlapping_glyphs_p
&& i
> 0)
4010 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4013 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4015 can_skip_p
= right
== 0;
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
4028 ppp ggg" in italic Courier font, and the desired row
4029 is "xxx ggg". The character `p' has lbearing, `g'
4030 has not. The loop above will stop in front of the
4031 first `p' in the current row. If we would start
4032 writing glyphs there, we wouldn't erase the lbearing
4033 of the `p'. The rest of the lbearing problem is then
4034 taken care of by x_draw_glyphs. */
4035 if (overlapping_glyphs_p
4037 && i
< current_row
->used
[TEXT_AREA
]
4038 && (current_row
->used
[TEXT_AREA
]
4039 != desired_row
->used
[TEXT_AREA
]))
4043 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4045 while (left
> 0 && i
> 0)
4047 --i
, --desired_glyph
, --current_glyph
;
4048 x
-= desired_glyph
->pixel_width
;
4049 left
-= desired_glyph
->pixel_width
;
4054 /* Try to avoid writing the entire rest of the desired row
4055 by looking for a resync point. This mainly prevents
4056 mode line flickering in the case the mode line is in
4057 fixed-pitch font, which it usually will be. */
4058 if (i
< desired_row
->used
[TEXT_AREA
])
4060 int start_x
= x
, start_hpos
= i
;
4061 struct glyph
*start
= desired_glyph
;
4063 int skip_first_p
= !can_skip_p
;
4065 /* Find the next glyph that's equal again. */
4068 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4071 x
+= desired_glyph
->pixel_width
;
4072 current_x
+= current_glyph
->pixel_width
;
4073 ++desired_glyph
, ++current_glyph
, ++i
;
4077 if (i
== start_hpos
|| x
!= current_x
)
4081 desired_glyph
= start
;
4085 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4086 rif
->write_glyphs (start
, i
- start_hpos
);
4091 /* Write the rest. */
4092 if (i
< desired_row
->used
[TEXT_AREA
])
4094 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4095 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4099 /* Maybe clear to end of line. */
4100 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4102 /* If new row extends to the end of the text area, nothing
4103 has to be cleared, if and only if we did a write_glyphs
4104 above. This is made sure by setting desired_stop_pos
4105 appropriately above. */
4106 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4108 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4110 /* If old row extends to the end of the text area, clear. */
4111 if (i
>= desired_row
->used
[TEXT_AREA
])
4112 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4113 desired_row
->x
+ desired_row
->pixel_width
);
4114 rif
->clear_end_of_line (-1);
4117 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4119 /* Otherwise clear to the end of the old row. Everything
4120 after that position should be clear already. */
4123 if (i
>= desired_row
->used
[TEXT_AREA
])
4124 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4125 desired_row
->x
+ desired_row
->pixel_width
);
4127 /* If cursor is displayed at the end of the line, make sure
4128 it's cleared. Nowadays we don't have a phys_cursor_glyph
4129 with which to erase the cursor (because this method
4130 doesn't work with lbearing/rbearing), so we must do it
4132 if (vpos
== w
->phys_cursor
.vpos
4133 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4135 w
->phys_cursor_on_p
= 0;
4139 x
= current_row
->x
+ current_row
->pixel_width
;
4140 rif
->clear_end_of_line (x
);
4149 /* Update row VPOS in window W. Value is non-zero if display has been
4153 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4155 int vpos
, *mouse_face_overwritten_p
;
4157 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4158 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4161 /* Set the row being updated. This is important to let xterm.c
4162 know what line height values are in effect. */
4163 updated_row
= desired_row
;
4165 /* A row can be completely invisible in case a desired matrix was
4166 built with a vscroll and then make_cursor_line_fully_visible shifts
4167 the matrix. Make sure to make such rows current anyway, since
4168 we need the correct y-position, for example, in the current matrix. */
4169 if (desired_row
->mode_line_p
4170 || desired_row
->visible_height
> 0)
4172 xassert (desired_row
->enabled_p
);
4174 /* Update display of the left margin area, if there is one. */
4175 if (!desired_row
->full_width_p
4176 && !NILP (w
->left_margin_width
))
4179 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4182 /* Update the display of the text area. */
4183 if (update_text_area (w
, vpos
))
4186 if (current_row
->mouse_face_p
)
4187 *mouse_face_overwritten_p
= 1;
4190 /* Update display of the right margin area, if there is one. */
4191 if (!desired_row
->full_width_p
4192 && !NILP (w
->right_margin_width
))
4195 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4198 /* Draw truncation marks etc. */
4199 if (!current_row
->enabled_p
4200 || desired_row
->y
!= current_row
->y
4201 || desired_row
->visible_height
!= current_row
->visible_height
4202 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4203 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4204 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4205 || desired_row
->continued_p
!= current_row
->continued_p
4206 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4207 || (desired_row
->indicate_empty_line_p
4208 != current_row
->indicate_empty_line_p
)
4209 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4210 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4211 rif
->after_update_window_line_hook (desired_row
);
4214 /* Update current_row from desired_row. */
4215 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4221 /* Set the cursor after an update of window W. This function may only
4222 be called from update_window. */
4225 set_window_cursor_after_update (w
)
4228 struct frame
*f
= XFRAME (w
->frame
);
4229 int cx
, cy
, vpos
, hpos
;
4231 /* Not intended for frame matrix updates. */
4232 xassert (FRAME_WINDOW_P (f
));
4234 if (cursor_in_echo_area
4235 && !NILP (echo_area_buffer
[0])
4236 /* If we are showing a message instead of the mini-buffer,
4237 show the cursor for the message instead. */
4238 && XWINDOW (minibuf_window
) == w
4239 && EQ (minibuf_window
, echo_area_window
)
4240 /* These cases apply only to the frame that contains
4241 the active mini-buffer window. */
4242 && FRAME_HAS_MINIBUF_P (f
)
4243 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4245 cx
= cy
= vpos
= hpos
= 0;
4247 if (cursor_in_echo_area
>= 0)
4249 /* If the mini-buffer is several lines high, find the last
4250 line that has any text on it. Note: either all lines
4251 are enabled or none. Otherwise we wouldn't be able to
4253 struct glyph_row
*row
, *last_row
;
4254 struct glyph
*glyph
;
4255 int yb
= window_text_bottom_y (w
);
4258 for (row
= MATRIX_ROW (w
->current_matrix
, 0);
4262 if (row
->used
[TEXT_AREA
]
4263 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4266 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4272 struct glyph
*start
= row
->glyphs
[TEXT_AREA
];
4273 struct glyph
*last
= start
+ row
->used
[TEXT_AREA
] - 1;
4275 while (last
> start
&& last
->charpos
< 0)
4278 for (glyph
= start
; glyph
< last
; ++glyph
)
4280 cx
+= glyph
->pixel_width
;
4285 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4293 hpos
= w
->cursor
.hpos
;
4294 vpos
= w
->cursor
.vpos
;
4297 /* Window cursor can be out of sync for horizontally split windows. */
4298 hpos
= max (0, hpos
);
4299 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4300 vpos
= max (0, vpos
);
4301 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4302 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4306 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4307 tree rooted at W. */
4310 set_window_update_flags (w
, on_p
)
4316 if (!NILP (w
->hchild
))
4317 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4318 else if (!NILP (w
->vchild
))
4319 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4321 w
->must_be_updated_p
= on_p
;
4323 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4329 /***********************************************************************
4330 Window-Based Scrolling
4331 ***********************************************************************/
4333 /* Structure describing rows in scrolling_window. */
4337 /* Number of occurrences of this row in desired and current matrix. */
4338 int old_uses
, new_uses
;
4340 /* Vpos of row in new matrix. */
4341 int new_line_number
;
4343 /* Bucket index of this row_entry in the hash table row_table. */
4346 /* The row described by this entry. */
4347 struct glyph_row
*row
;
4349 /* Hash collision chain. */
4350 struct row_entry
*next
;
4353 /* A pool to allocate row_entry structures from, and the size of the
4354 pool. The pool is reallocated in scrolling_window when we find
4355 that we need a larger one. */
4357 static struct row_entry
*row_entry_pool
;
4358 static int row_entry_pool_size
;
4360 /* Index of next free entry in row_entry_pool. */
4362 static int row_entry_idx
;
4364 /* The hash table used during scrolling, and the table's size. This
4365 table is used to quickly identify equal rows in the desired and
4368 static struct row_entry
**row_table
;
4369 static int row_table_size
;
4371 /* Vectors of pointers to row_entry structures belonging to the
4372 current and desired matrix, and the size of the vectors. */
4374 static struct row_entry
**old_lines
, **new_lines
;
4375 static int old_lines_size
, new_lines_size
;
4377 /* A pool to allocate run structures from, and its size. */
4379 static struct run
*run_pool
;
4380 static int runs_size
;
4382 /* A vector of runs of lines found during scrolling. */
4384 static struct run
**runs
;
4386 static struct row_entry
*add_row_entry
P_ ((struct window
*,
4387 struct glyph_row
*));
4390 /* Add glyph row ROW to the scrolling hash table during the scrolling
4393 static INLINE
struct row_entry
*
4394 add_row_entry (w
, row
)
4396 struct glyph_row
*row
;
4398 struct row_entry
*entry
;
4399 int i
= row
->hash
% row_table_size
;
4401 entry
= row_table
[i
];
4402 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4403 entry
= entry
->next
;
4407 entry
= row_entry_pool
+ row_entry_idx
++;
4409 entry
->old_uses
= entry
->new_uses
= 0;
4410 entry
->new_line_number
= 0;
4412 entry
->next
= row_table
[i
];
4413 row_table
[i
] = entry
;
4420 /* Try to reuse part of the current display of W by scrolling lines.
4421 HEADER_LINE_P non-zero means W has a top mode line.
4423 The algorithm is taken from Communications of the ACM, Apr78 "A
4424 Technique for Isolating Differences Between Files." It should take
4427 A short outline of the steps of the algorithm
4429 1. Skip lines equal at the start and end of both matrices.
4431 2. Enter rows in the current and desired matrix into a symbol
4432 table, counting how often they appear in both matrices.
4434 3. Rows that appear exactly once in both matrices serve as anchors,
4435 i.e. we assume that such lines are likely to have been moved.
4437 4. Starting from anchor lines, extend regions to be scrolled both
4438 forward and backward.
4442 -1 if all rows were found to be equal.
4443 0 to indicate that we did not scroll the display, or
4444 1 if we did scroll. */
4447 scrolling_window (w
, header_line_p
)
4451 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4452 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4453 int yb
= window_text_bottom_y (w
);
4454 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4455 int nruns
, nbytes
, n
, run_idx
;
4456 struct row_entry
*entry
;
4458 /* Skip over rows equal at the start. */
4459 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4461 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4462 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4467 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4468 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4469 && row_equal_p (w
, c
, d
, 1))
4478 /* Give up if some rows in the desired matrix are not enabled. */
4479 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4482 first_old
= first_new
= i
;
4484 /* Set last_new to the index + 1 of the last enabled row in the
4487 while (i
< desired_matrix
->nrows
- 1
4488 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4489 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4492 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4497 /* Set last_old to the index + 1 of the last enabled row in the
4498 current matrix. We don't look at the enabled flag here because
4499 we plan to reuse part of the display even if other parts are
4502 while (i
< current_matrix
->nrows
- 1
4503 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
)) <= yb
)
4507 /* Skip over rows equal at the bottom. */
4510 while (i
- 1 > first_new
4511 && j
- 1 > first_old
4512 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4513 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4514 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4516 MATRIX_ROW (desired_matrix
, i
- 1),
4517 MATRIX_ROW (current_matrix
, j
- 1), 1))
4522 /* Nothing to do if all rows are equal. */
4523 if (last_new
== first_new
)
4526 /* Reallocate vectors, tables etc. if necessary. */
4528 if (current_matrix
->nrows
> old_lines_size
)
4530 old_lines_size
= current_matrix
->nrows
;
4531 nbytes
= old_lines_size
* sizeof *old_lines
;
4532 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4535 if (desired_matrix
->nrows
> new_lines_size
)
4537 new_lines_size
= desired_matrix
->nrows
;
4538 nbytes
= new_lines_size
* sizeof *new_lines
;
4539 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4542 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4543 if (3 * n
> row_table_size
)
4545 row_table_size
= next_almost_prime (3 * n
);
4546 nbytes
= row_table_size
* sizeof *row_table
;
4547 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4548 bzero (row_table
, nbytes
);
4551 if (n
> row_entry_pool_size
)
4553 row_entry_pool_size
= n
;
4554 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4555 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4558 if (desired_matrix
->nrows
> runs_size
)
4560 runs_size
= desired_matrix
->nrows
;
4561 nbytes
= runs_size
* sizeof *runs
;
4562 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4563 nbytes
= runs_size
* sizeof *run_pool
;
4564 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4567 nruns
= run_idx
= 0;
4570 /* Add rows from the current and desired matrix to the hash table
4571 row_hash_table to be able to find equal ones quickly. */
4573 for (i
= first_old
; i
< last_old
; ++i
)
4575 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4577 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4578 old_lines
[i
] = entry
;
4582 old_lines
[i
] = NULL
;
4585 for (i
= first_new
; i
< last_new
; ++i
)
4587 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4588 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4590 entry
->new_line_number
= i
;
4591 new_lines
[i
] = entry
;
4594 /* Identify moves based on lines that are unique and equal
4595 in both matrices. */
4596 for (i
= first_old
; i
< last_old
;)
4598 && old_lines
[i
]->old_uses
== 1
4599 && old_lines
[i
]->new_uses
== 1)
4602 int new_line
= old_lines
[i
]->new_line_number
;
4603 struct run
*run
= run_pool
+ run_idx
++;
4606 run
->current_vpos
= i
;
4607 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4608 run
->desired_vpos
= new_line
;
4609 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4611 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4613 /* Extend backward. */
4616 while (j
> first_old
4618 && old_lines
[j
] == new_lines
[k
])
4620 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4621 --run
->current_vpos
;
4622 --run
->desired_vpos
;
4625 run
->desired_y
-= h
;
4626 run
->current_y
-= h
;
4630 /* Extend forward. */
4635 && old_lines
[j
] == new_lines
[k
])
4637 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4643 /* Insert run into list of all runs. Order runs by copied
4644 pixel lines. Note that we record runs that don't have to
4645 be copied because they are already in place. This is done
4646 because we can avoid calling update_window_line in this
4648 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4650 for (k
= nruns
; k
> j
; --k
)
4651 runs
[k
] = runs
[k
- 1];
4660 /* Do the moves. Do it in a way that we don't overwrite something
4661 we want to copy later on. This is not solvable in general
4662 because there is only one display and we don't have a way to
4663 exchange areas on this display. Example:
4665 +-----------+ +-----------+
4667 +-----------+ --> +-----------+
4669 +-----------+ +-----------+
4671 Instead, prefer bigger moves, and invalidate moves that would
4672 copy from where we copied to. */
4674 for (i
= 0; i
< nruns
; ++i
)
4675 if (runs
[i
]->nrows
> 0)
4677 struct run
*r
= runs
[i
];
4679 /* Copy on the display. */
4680 if (r
->current_y
!= r
->desired_y
)
4682 rif
->scroll_run_hook (w
, r
);
4684 /* Invalidate runs that copy from where we copied to. */
4685 for (j
= i
+ 1; j
< nruns
; ++j
)
4687 struct run
*p
= runs
[j
];
4689 if ((p
->current_y
>= r
->desired_y
4690 && p
->current_y
< r
->desired_y
+ r
->height
)
4691 || (p
->current_y
+ p
->height
>= r
->desired_y
4692 && (p
->current_y
+ p
->height
4693 < r
->desired_y
+ r
->height
)))
4698 /* Assign matrix rows. */
4699 for (j
= 0; j
< r
->nrows
; ++j
)
4701 struct glyph_row
*from
, *to
;
4702 int to_overlapped_p
;
4704 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4705 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4706 to_overlapped_p
= to
->overlapped_p
;
4707 assign_row (to
, from
);
4708 to
->enabled_p
= 1, from
->enabled_p
= 0;
4709 to
->overlapped_p
= to_overlapped_p
;
4713 /* Clear the hash table, for the next time. */
4714 for (i
= 0; i
< row_entry_idx
; ++i
)
4715 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4717 /* Value is non-zero to indicate that we scrolled the display. */
4723 /************************************************************************
4725 ************************************************************************/
4727 /* Update the desired frame matrix of frame F.
4729 FORCE_P non-zero means that the update should not be stopped by
4730 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4731 should not be tried.
4733 Value is non-zero if update was stopped due to pending input. */
4736 update_frame_1 (f
, force_p
, inhibit_id_p
)
4741 /* Frame matrices to work on. */
4742 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4743 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4746 int preempt_count
= baud_rate
/ 2400 + 1;
4747 extern int input_pending
;
4749 xassert (current_matrix
&& desired_matrix
);
4751 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4752 calculate_costs (f
);
4754 if (preempt_count
<= 0)
4757 if (redisplay_dont_pause
)
4759 else if (!force_p
&& detect_input_pending ())
4765 /* If we cannot insert/delete lines, it's no use trying it. */
4766 if (!line_ins_del_ok
)
4769 /* See if any of the desired lines are enabled; don't compute for
4770 i/d line if just want cursor motion. */
4771 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4772 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4775 /* Try doing i/d line, if not yet inhibited. */
4776 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4777 force_p
|= scrolling (f
);
4779 /* Update the individual lines as needed. Do bottom line first. */
4780 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4781 update_frame_line (f
, desired_matrix
->nrows
- 1);
4783 /* Now update the rest of the lines. */
4784 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4786 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4788 if (FRAME_TERMCAP_P (f
))
4790 /* Flush out every so many lines.
4791 Also flush out if likely to have more than 1k buffered
4792 otherwise. I'm told that some telnet connections get
4793 really screwed by more than 1k output at once. */
4794 int outq
= PENDING_OUTPUT_COUNT (stdout
);
4796 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4799 if (preempt_count
== 1)
4801 #ifdef EMACS_OUTQSIZE
4802 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4803 /* Probably not a tty. Ignore the error and reset
4804 * the outq count. */
4805 outq
= PENDING_OUTPUT_COUNT (stdout
);
4808 if (baud_rate
<= outq
&& baud_rate
> 0)
4809 sleep (outq
/ baud_rate
);
4814 if ((i
- 1) % preempt_count
== 0)
4815 detect_input_pending ();
4817 update_frame_line (f
, i
);
4821 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
4823 /* Now just clean up termcap drivers and set cursor, etc. */
4826 if ((cursor_in_echo_area
4827 /* If we are showing a message instead of the mini-buffer,
4828 show the cursor for the message instead of for the
4829 (now hidden) mini-buffer contents. */
4830 || (EQ (minibuf_window
, selected_window
)
4831 && EQ (minibuf_window
, echo_area_window
)
4832 && !NILP (echo_area_buffer
[0])))
4833 /* These cases apply only to the frame that contains
4834 the active mini-buffer window. */
4835 && FRAME_HAS_MINIBUF_P (f
)
4836 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4838 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
4841 if (cursor_in_echo_area
< 0)
4843 /* Negative value of cursor_in_echo_area means put
4844 cursor at beginning of line. */
4850 /* Positive value of cursor_in_echo_area means put
4851 cursor at the end of the prompt. If the mini-buffer
4852 is several lines high, find the last line that has
4854 row
= FRAME_HEIGHT (f
);
4860 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4862 /* Frame rows are filled up with spaces that
4863 must be ignored here. */
4864 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4866 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4867 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4870 && (last
- 1)->charpos
< 0)
4876 while (row
> top
&& col
== 0);
4878 /* Make sure COL is not out of range. */
4879 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4881 /* If we have another row, advance cursor into it. */
4882 if (row
< FRAME_HEIGHT (f
) - 1)
4884 col
= FRAME_LEFT_SCROLL_BAR_WIDTH (f
);
4887 /* Otherwise move it back in range. */
4889 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4893 cursor_to (row
, col
);
4897 /* We have only one cursor on terminal frames. Use it to
4898 display the cursor of the selected window. */
4899 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4900 if (w
->cursor
.vpos
>= 0
4901 /* The cursor vpos may be temporarily out of bounds
4902 in the following situation: There is one window,
4903 with the cursor in the lower half of it. The window
4904 is split, and a message causes a redisplay before
4905 a new cursor position has been computed. */
4906 && w
->cursor
.vpos
< XFASTINT (w
->height
))
4908 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4909 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4911 if (INTEGERP (w
->left_margin_width
))
4912 x
+= XFASTINT (w
->left_margin_width
);
4914 /* x = max (min (x, FRAME_WINDOW_WIDTH (f) - 1), 0); */
4922 clear_desired_matrices (f
);
4927 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4931 struct frame
*frame
;
4933 int unchanged_at_top
, unchanged_at_bottom
;
4936 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4937 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4938 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4939 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
4941 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
4942 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4943 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4945 if (!current_matrix
)
4948 /* Compute hash codes of all the lines. Also calculate number of
4949 changed lines, number of unchanged lines at the beginning, and
4950 number of unchanged lines at the end. */
4952 unchanged_at_top
= 0;
4953 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
4954 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
4956 /* Give up on this scrolling if some old lines are not enabled. */
4957 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4959 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4960 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4962 /* This line cannot be redrawn, so don't let scrolling mess it. */
4963 new_hash
[i
] = old_hash
[i
];
4964 #define INFINITY 1000000 /* Taken from scroll.c */
4965 draw_cost
[i
] = INFINITY
;
4969 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4970 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4973 if (old_hash
[i
] != new_hash
[i
])
4976 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
4978 else if (i
== unchanged_at_top
)
4980 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4983 /* If changed lines are few, don't allow preemption, don't scroll. */
4984 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
4985 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
4988 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
4989 - unchanged_at_bottom
);
4991 if (scroll_region_ok
)
4992 free_at_end_vpos
-= unchanged_at_bottom
;
4993 else if (memory_below_frame
)
4994 free_at_end_vpos
= -1;
4996 /* If large window, fast terminal and few lines in common between
4997 current frame and desired frame, don't bother with i/d calc. */
4998 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5000 10 * scrolling_max_lines_saved (unchanged_at_top
,
5001 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
5002 old_hash
, new_hash
, draw_cost
)))
5005 if (window_size
< 2)
5008 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5009 draw_cost
+ unchanged_at_top
- 1,
5010 old_draw_cost
+ unchanged_at_top
- 1,
5011 old_hash
+ unchanged_at_top
- 1,
5012 new_hash
+ unchanged_at_top
- 1,
5013 free_at_end_vpos
- unchanged_at_top
);
5019 /* Count the number of blanks at the start of the vector of glyphs R
5020 which is LEN glyphs long. */
5023 count_blanks (r
, len
)
5029 for (i
= 0; i
< len
; ++i
)
5030 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5037 /* Count the number of glyphs in common at the start of the glyph
5038 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5039 of STR2. Value is the number of equal glyphs equal at the start. */
5042 count_match (str1
, end1
, str2
, end2
)
5043 struct glyph
*str1
, *end1
, *str2
, *end2
;
5045 struct glyph
*p1
= str1
;
5046 struct glyph
*p2
= str2
;
5050 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5057 /* Char insertion/deletion cost vector, from term.c */
5059 extern int *char_ins_del_vector
;
5060 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WINDOW_WIDTH((f))])
5063 /* Perform a frame-based update on line VPOS in frame FRAME. */
5066 update_frame_line (frame
, vpos
)
5067 register struct frame
*frame
;
5070 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5072 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5073 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5074 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5075 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5076 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5077 int must_write_whole_line_p
;
5078 int write_spaces_p
= must_write_spaces
;
5079 int colored_spaces_p
= (FACE_FROM_ID (frame
, DEFAULT_FACE_ID
)->background
5080 != FACE_TTY_DEFAULT_BG_COLOR
);
5082 if (colored_spaces_p
)
5085 if (desired_row
->inverse_p
5086 != (current_row
->enabled_p
&& current_row
->inverse_p
))
5088 int n
= current_row
->enabled_p
? current_row
->used
[TEXT_AREA
] : 0;
5089 change_line_highlight (desired_row
->inverse_p
, vpos
, vpos
, n
);
5090 current_row
->enabled_p
= 0;
5093 reassert_line_highlight (desired_row
->inverse_p
, vpos
);
5095 /* Current row not enabled means it has unknown contents. We must
5096 write the whole desired line in that case. */
5097 must_write_whole_line_p
= !current_row
->enabled_p
;
5098 if (must_write_whole_line_p
)
5105 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5106 olen
= current_row
->used
[TEXT_AREA
];
5108 if (!current_row
->inverse_p
)
5110 /* Ignore trailing spaces, if we can. */
5111 if (!write_spaces_p
)
5112 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5117 /* For an inverse-video line, make sure it's filled with
5118 spaces all the way to the frame edge so that the reverse
5119 video extends all the way across. */
5120 while (olen
< FRAME_WIDTH (frame
) - 1)
5121 obody
[olen
++] = space_glyph
;
5125 current_row
->enabled_p
= 1;
5126 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5127 current_row
->inverse_p
= desired_row
->inverse_p
;
5129 /* If desired line is empty, just clear the line. */
5130 if (!desired_row
->enabled_p
)
5136 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5137 nlen
= desired_row
->used
[TEXT_AREA
];
5138 nend
= nbody
+ nlen
;
5140 /* If display line has unknown contents, write the whole line. */
5141 if (must_write_whole_line_p
)
5143 /* Ignore spaces at the end, if we can. */
5144 if (!write_spaces_p
)
5145 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5148 /* Write the contents of the desired line. */
5151 cursor_to (vpos
, 0);
5152 write_glyphs (nbody
, nlen
);
5155 /* Don't call clear_end_of_line if we already wrote the whole
5156 line. The cursor will not be at the right margin in that
5157 case but in the line below. */
5158 if (nlen
< FRAME_WINDOW_WIDTH (frame
))
5160 cursor_to (vpos
, nlen
);
5161 clear_end_of_line (FRAME_WINDOW_WIDTH (frame
));
5164 /* Make sure we are in the right row, otherwise cursor movement
5165 with cmgoto might use `ch' in the wrong row. */
5166 cursor_to (vpos
, 0);
5168 make_current (desired_matrix
, current_matrix
, vpos
);
5172 /* Pretend trailing spaces are not there at all,
5173 unless for one reason or another we must write all spaces. */
5174 if (!desired_row
->inverse_p
)
5176 if (!write_spaces_p
)
5177 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5182 /* For an inverse-video line, give it extra trailing spaces all
5183 the way to the frame edge so that the reverse video extends
5184 all the way across. */
5185 while (nlen
< FRAME_WIDTH (frame
) - 1)
5186 nbody
[nlen
++] = space_glyph
;
5189 /* If there's no i/d char, quickly do the best we can without it. */
5190 if (!char_ins_del_ok
)
5194 /* Find the first glyph in desired row that doesn't agree with
5195 a glyph in the current row, and write the rest from there on. */
5196 for (i
= 0; i
< nlen
; i
++)
5198 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5200 /* Find the end of the run of different glyphs. */
5204 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5205 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5208 /* Output this run of non-matching chars. */
5209 cursor_to (vpos
, i
);
5210 write_glyphs (nbody
+ i
, j
- i
);
5213 /* Now find the next non-match. */
5217 /* Clear the rest of the line, or the non-clear part of it. */
5220 cursor_to (vpos
, nlen
);
5221 clear_end_of_line (olen
);
5224 /* Make current row = desired row. */
5225 make_current (desired_matrix
, current_matrix
, vpos
);
5229 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5230 characters in a row. */
5234 /* If current line is blank, skip over initial spaces, if
5235 possible, and write the rest. */
5236 if (write_spaces_p
|| desired_row
->inverse_p
)
5239 nsp
= count_blanks (nbody
, nlen
);
5243 cursor_to (vpos
, nsp
);
5244 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5247 /* Exchange contents between current_frame and new_frame. */
5248 make_current (desired_matrix
, current_matrix
, vpos
);
5252 /* Compute number of leading blanks in old and new contents. */
5253 osp
= count_blanks (obody
, olen
);
5254 nsp
= (desired_row
->inverse_p
|| colored_spaces_p
5256 : count_blanks (nbody
, nlen
));
5258 /* Compute number of matching chars starting with first non-blank. */
5259 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5260 nbody
+ nsp
, nbody
+ nlen
);
5262 /* Spaces in new match implicit space past the end of old. */
5263 /* A bug causing this to be a no-op was fixed in 18.29. */
5264 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5267 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5271 /* Avoid doing insert/delete char
5272 just cause number of leading spaces differs
5273 when the following text does not match. */
5274 if (begmatch
== 0 && osp
!= nsp
)
5275 osp
= nsp
= min (osp
, nsp
);
5277 /* Find matching characters at end of line */
5280 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5282 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5287 endmatch
= obody
+ olen
- op1
;
5289 /* tem gets the distance to insert or delete.
5290 endmatch is how many characters we save by doing so.
5293 tem
= (nlen
- nsp
) - (olen
- osp
);
5295 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
5298 /* nsp - osp is the distance to insert or delete.
5299 If that is nonzero, begmatch is known to be nonzero also.
5300 begmatch + endmatch is how much we save by doing the ins/del.
5304 && (!char_ins_del_ok
5305 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
5309 osp
= nsp
= min (osp
, nsp
);
5312 /* Now go through the line, inserting, writing and
5313 deleting as appropriate. */
5317 cursor_to (vpos
, nsp
);
5318 delete_glyphs (osp
- nsp
);
5322 /* If going to delete chars later in line
5323 and insert earlier in the line,
5324 must delete first to avoid losing data in the insert */
5325 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5327 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5328 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5329 olen
= nlen
- (nsp
- osp
);
5331 cursor_to (vpos
, osp
);
5332 insert_glyphs (0, nsp
- osp
);
5336 tem
= nsp
+ begmatch
+ endmatch
;
5337 if (nlen
!= tem
|| olen
!= tem
)
5339 cursor_to (vpos
, nsp
+ begmatch
);
5340 if (!endmatch
|| nlen
== olen
)
5342 /* If new text being written reaches right margin,
5343 there is no need to do clear-to-eol at the end.
5344 (and it would not be safe, since cursor is not
5345 going to be "at the margin" after the text is done) */
5346 if (nlen
== FRAME_WINDOW_WIDTH (frame
))
5348 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5350 else if (nlen
> olen
)
5352 /* Here, we used to have the following simple code:
5353 ----------------------------------------
5354 write_glyphs (nbody + nsp + begmatch, olen - tem);
5355 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5356 ----------------------------------------
5357 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5358 is a padding glyph. */
5359 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5362 /* Calculate columns we can actually overwrite. */
5363 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
])) out
--;
5364 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5365 /* If we left columns to be overwritten, we must delete them. */
5366 del
= olen
- tem
- out
;
5367 if (del
> 0) delete_glyphs (del
);
5368 /* At last, we insert columns not yet written out. */
5369 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5372 else if (olen
> nlen
)
5374 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5375 delete_glyphs (olen
- nlen
);
5381 /* If any unerased characters remain after the new line, erase them. */
5384 cursor_to (vpos
, nlen
);
5385 clear_end_of_line (olen
);
5388 /* Exchange contents between current_frame and new_frame. */
5389 make_current (desired_matrix
, current_matrix
, vpos
);
5394 /***********************************************************************
5395 X/Y Position -> Buffer Position
5396 ***********************************************************************/
5398 /* Return the character position of the character at window relative
5399 pixel position (*X, *Y). *X and *Y are adjusted to character
5403 buffer_posn_from_coords (w
, x
, y
)
5408 struct buffer
*old_current_buffer
= current_buffer
;
5409 struct text_pos startp
;
5410 int left_area_width
;
5412 current_buffer
= XBUFFER (w
->buffer
);
5413 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5414 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5415 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5416 start_display (&it
, w
, startp
);
5418 left_area_width
= WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH (w
);
5419 move_it_to (&it
, -1, *x
+ it
.first_visible_x
- left_area_width
, *y
, -1,
5420 MOVE_TO_X
| MOVE_TO_Y
);
5422 *x
= it
.current_x
- it
.first_visible_x
+ left_area_width
;
5424 current_buffer
= old_current_buffer
;
5425 return IT_CHARPOS (it
);
5429 /* Value is the string under window-relative coordinates X/Y in the
5430 mode or top line of window W, or nil if none. MODE_LINE_P non-zero
5431 means look at the mode line. *CHARPOS is set to the position in
5432 the string returned. */
5435 mode_line_string (w
, x
, y
, mode_line_p
, charpos
)
5437 int x
, y
, mode_line_p
;
5440 struct glyph_row
*row
;
5441 struct glyph
*glyph
, *end
;
5442 struct frame
*f
= XFRAME (w
->frame
);
5444 Lisp_Object string
= Qnil
;
5447 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5449 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5451 if (row
->mode_line_p
&& row
->enabled_p
)
5453 /* The mode lines are displayed over scroll bars and bitmap
5454 areas, and X is window-relative. Correct X by the scroll bar
5455 and bitmap area width. */
5456 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
5457 x
+= FRAME_SCROLL_BAR_COLS (f
) * CANON_X_UNIT (f
);
5458 x
+= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
5460 /* Find the glyph under X. If we find one with a string object,
5461 it's the one we were looking for. */
5462 glyph
= row
->glyphs
[TEXT_AREA
];
5463 end
= glyph
+ row
->used
[TEXT_AREA
];
5464 for (x0
= 0; glyph
< end
; x0
+= glyph
->pixel_width
, ++glyph
)
5465 if (x
>= x0
&& x
< x0
+ glyph
->pixel_width
)
5467 string
= glyph
->object
;
5468 *charpos
= glyph
->charpos
;
5477 /***********************************************************************
5478 Changing Frame Sizes
5479 ***********************************************************************/
5484 window_change_signal (signalnum
) /* If we don't have an argument, */
5485 int signalnum
; /* some compilers complain in signal calls. */
5491 int old_errno
= errno
;
5493 get_frame_size (&width
, &height
);
5495 /* The frame size change obviously applies to a termcap-controlled
5496 frame. Find such a frame in the list, and assume it's the only
5497 one (since the redisplay code always writes to stdout, not a
5498 FILE * specified in the frame structure). Record the new size,
5499 but don't reallocate the data structures now. Let that be done
5500 later outside of the signal handler. */
5503 Lisp_Object tail
, frame
;
5505 FOR_EACH_FRAME (tail
, frame
)
5507 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5509 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5515 signal (SIGWINCH
, window_change_signal
);
5518 #endif /* SIGWINCH */
5521 /* Do any change in frame size that was requested by a signal. SAFE
5522 non-zero means this function is called from a place where it is
5523 safe to change frame sizes while a redisplay is in progress. */
5526 do_pending_window_change (safe
)
5529 /* If window_change_signal should have run before, run it now. */
5530 if (redisplaying_p
&& !safe
)
5533 while (delayed_size_change
)
5535 Lisp_Object tail
, frame
;
5537 delayed_size_change
= 0;
5539 FOR_EACH_FRAME (tail
, frame
)
5541 struct frame
*f
= XFRAME (frame
);
5543 int height
= FRAME_NEW_HEIGHT (f
);
5544 int width
= FRAME_NEW_WIDTH (f
);
5546 if (height
!= 0 || width
!= 0)
5547 change_frame_size (f
, height
, width
, 0, 0, safe
);
5553 /* Change the frame height and/or width. Values may be given as zero to
5554 indicate no change is to take place.
5556 If DELAY is non-zero, then assume we're being called from a signal
5557 handler, and queue the change for later - perhaps the next
5558 redisplay. Since this tries to resize windows, we can't call it
5559 from a signal handler.
5561 SAFE non-zero means this function is called from a place where it's
5562 safe to change frame sizes while a redisplay is in progress. */
5565 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5566 register struct frame
*f
;
5567 int newheight
, newwidth
, pretend
, delay
, safe
;
5569 Lisp_Object tail
, frame
;
5571 if (! FRAME_WINDOW_P (f
))
5573 /* When using termcap, or on MS-DOS, all frames use
5574 the same screen, so a change in size affects all frames. */
5575 FOR_EACH_FRAME (tail
, frame
)
5576 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5577 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5578 pretend
, delay
, safe
);
5581 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5585 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5586 register struct frame
*f
;
5587 int newheight
, newwidth
, pretend
, delay
, safe
;
5589 int new_frame_window_width
;
5590 int count
= specpdl_ptr
- specpdl
;
5592 /* If we can't deal with the change now, queue it for later. */
5593 if (delay
|| (redisplaying_p
&& !safe
))
5595 FRAME_NEW_HEIGHT (f
) = newheight
;
5596 FRAME_NEW_WIDTH (f
) = newwidth
;
5597 delayed_size_change
= 1;
5601 /* This size-change overrides any pending one for this frame. */
5602 FRAME_NEW_HEIGHT (f
) = 0;
5603 FRAME_NEW_WIDTH (f
) = 0;
5605 /* If an argument is zero, set it to the current value. */
5607 newheight
= FRAME_HEIGHT (f
);
5609 newwidth
= FRAME_WIDTH (f
);
5611 /* Compute width of windows in F.
5612 This is the width of the frame without vertical scroll bars. */
5613 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (f
, newwidth
);
5615 /* Round up to the smallest acceptable size. */
5616 check_frame_size (f
, &newheight
, &newwidth
);
5618 /* If we're not changing the frame size, quit now. */
5619 if (newheight
== FRAME_HEIGHT (f
)
5620 && new_frame_window_width
== FRAME_WINDOW_WIDTH (f
))
5626 /* We only can set screen dimensions to certain values supported
5627 by our video hardware. Try to find the smallest size greater
5628 or equal to the requested dimensions. */
5629 dos_set_window_size (&newheight
, &newwidth
);
5632 if (newheight
!= FRAME_HEIGHT (f
))
5634 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5636 /* Frame has both root and mini-buffer. */
5637 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top
,
5638 FRAME_TOP_MARGIN (f
));
5639 set_window_height (FRAME_ROOT_WINDOW (f
),
5642 - FRAME_TOP_MARGIN (f
)),
5644 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
,
5646 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5649 /* Frame has just one top-level window. */
5650 set_window_height (FRAME_ROOT_WINDOW (f
),
5651 newheight
- FRAME_TOP_MARGIN (f
), 0);
5653 if (FRAME_TERMCAP_P (f
) && !pretend
)
5654 FrameRows
= newheight
;
5657 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (f
))
5659 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_window_width
, 0);
5660 if (FRAME_HAS_MINIBUF_P (f
))
5661 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_window_width
, 0);
5663 if (FRAME_TERMCAP_P (f
) && !pretend
)
5664 FrameCols
= newwidth
;
5666 if (WINDOWP (f
->tool_bar_window
))
5667 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->width
, newwidth
);
5670 FRAME_HEIGHT (f
) = newheight
;
5671 SET_FRAME_WIDTH (f
, newwidth
);
5674 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5675 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5677 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5679 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5680 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5681 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5682 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5686 SET_FRAME_GARBAGED (f
);
5687 calculate_costs (f
);
5691 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5693 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
5694 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
5695 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
);
5697 unbind_to (count
, Qnil
);
5702 /***********************************************************************
5703 Terminal Related Lisp Functions
5704 ***********************************************************************/
5706 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5707 1, 1, "FOpen termscript file: ",
5708 "Start writing all terminal output to FILE as well as the terminal.\n\
5709 FILE = nil means just close any termscript file currently open.")
5713 if (termscript
!= 0) fclose (termscript
);
5718 file
= Fexpand_file_name (file
, Qnil
);
5719 termscript
= fopen (XSTRING (file
)->data
, "w");
5720 if (termscript
== 0)
5721 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5727 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5728 Ssend_string_to_terminal
, 1, 1, 0,
5729 "Send STRING to the terminal without alteration.\n\
5730 Control characters in STRING will have terminal-dependent effects.")
5734 /* ??? Perhaps we should do something special for multibyte strings here. */
5735 CHECK_STRING (string
, 0);
5736 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)), stdout
);
5740 fwrite (XSTRING (string
)->data
, 1, STRING_BYTES (XSTRING (string
)),
5742 fflush (termscript
);
5748 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5749 "Beep, or flash the screen.\n\
5750 Also, unless an argument is given,\n\
5751 terminate any keyboard macro currently executing.")
5774 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5775 error ("Keyboard macro terminated by a command ringing the bell");
5783 /***********************************************************************
5785 ***********************************************************************/
5787 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5788 "Pause, without updating display, for SECONDS seconds.\n\
5789 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5790 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5791 additional wait period, in milliseconds; this may be useful if your\n\
5792 Emacs was built without floating point support.\n\
5793 \(Not all operating systems support waiting for a fraction of a second.)")
5794 (seconds
, milliseconds
)
5795 Lisp_Object seconds
, milliseconds
;
5799 if (NILP (milliseconds
))
5800 XSETINT (milliseconds
, 0);
5802 CHECK_NUMBER (milliseconds
, 1);
5803 usec
= XINT (milliseconds
) * 1000;
5806 double duration
= extract_float (seconds
);
5807 sec
= (int) duration
;
5808 usec
+= (duration
- sec
) * 1000000;
5811 #ifndef EMACS_HAS_USECS
5812 if (sec
== 0 && usec
!= 0)
5813 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5816 /* Assure that 0 <= usec < 1000000. */
5819 /* We can't rely on the rounding being correct if user is negative. */
5820 if (-1000000 < usec
)
5821 sec
--, usec
+= 1000000;
5823 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
5826 sec
+= usec
/ 1000000, usec
%= 1000000;
5828 if (sec
< 0 || (sec
== 0 && usec
== 0))
5834 XSETFASTINT (zero
, 0);
5835 wait_reading_process_input (sec
, usec
, zero
, 0);
5838 /* We should always have wait_reading_process_input; we have a dummy
5839 implementation for systems which don't support subprocesses. */
5841 /* No wait_reading_process_input */
5848 /* The reason this is done this way
5849 (rather than defined (H_S) && defined (H_T))
5850 is because the VMS preprocessor doesn't grok `defined' */
5852 EMACS_GET_TIME (end_time
);
5853 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
5854 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
5858 EMACS_GET_TIME (timeout
);
5859 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
5860 if (EMACS_TIME_NEG_P (timeout
)
5861 || !select (1, 0, 0, 0, &timeout
))
5864 #else /* not HAVE_SELECT */
5866 #endif /* HAVE_SELECT */
5867 #endif /* not VMS */
5870 #endif /* no subprocesses */
5876 /* This is just like wait_reading_process_input, except that
5877 it does the redisplay.
5879 It's also much like Fsit_for, except that it can be used for
5880 waiting for input as well. */
5883 sit_for (sec
, usec
, reading
, display
, initial_display
)
5884 int sec
, usec
, reading
, display
, initial_display
;
5886 Lisp_Object read_kbd
;
5888 swallow_events (display
);
5890 if (detect_input_pending_run_timers (display
))
5893 if (initial_display
)
5894 redisplay_preserve_echo_area ();
5896 if (sec
== 0 && usec
== 0)
5903 XSETINT (read_kbd
, reading
? -1 : 1);
5904 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
5906 return detect_input_pending () ? Qnil
: Qt
;
5910 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
5911 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
5912 SECONDS may be a floating-point value, meaning that you can wait for a\n\
5913 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
5914 additional wait period, in milliseconds; this may be useful if your\n\
5915 Emacs was built without floating point support.\n\
5916 \(Not all operating systems support waiting for a fraction of a second.)\n\
5917 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
5918 Redisplay is preempted as always if input arrives, and does not happen\n\
5919 if input is available before it starts.\n\
5920 Value is t if waited the full time with no input arriving.")
5921 (seconds
, milliseconds
, nodisp
)
5922 Lisp_Object seconds
, milliseconds
, nodisp
;
5926 if (NILP (milliseconds
))
5927 XSETINT (milliseconds
, 0);
5929 CHECK_NUMBER (milliseconds
, 1);
5930 usec
= XINT (milliseconds
) * 1000;
5933 double duration
= extract_float (seconds
);
5934 sec
= (int) duration
;
5935 usec
+= (duration
- sec
) * 1000000;
5938 #ifndef EMACS_HAS_USECS
5939 if (usec
!= 0 && sec
== 0)
5940 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
5943 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
5948 /***********************************************************************
5949 Other Lisp Functions
5950 ***********************************************************************/
5952 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
5953 session's frames, frame names, buffers, buffer-read-only flags, and
5954 buffer-modified-flags, and a trailing sentinel (so we don't need to
5955 add length checks). */
5957 static Lisp_Object frame_and_buffer_state
;
5960 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
5961 Sframe_or_buffer_changed_p
, 0, 0, 0,
5962 "Return non-nil if the frame and buffer state appears to have changed.\n\
5963 The state variable is an internal vector containing all frames and buffers,\n\
5964 aside from buffers whose names start with space,\n\
5965 along with the buffers' read-only and modified flags, which allows a fast\n\
5966 check to see whether the menu bars might need to be recomputed.\n\
5967 If this function returns non-nil, it updates the internal vector to reflect\n\
5968 the current state.\n")
5971 Lisp_Object tail
, frame
, buf
;
5975 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
5976 FOR_EACH_FRAME (tail
, frame
)
5978 if (!EQ (*vecp
++, frame
))
5980 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
5983 /* Check that the buffer info matches.
5984 No need to test for the end of the vector
5985 because the last element of the vector is lambda
5986 and that will always cause a mismatch. */
5987 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
5989 buf
= XCDR (XCAR (tail
));
5990 /* Ignore buffers that aren't included in buffer lists. */
5991 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
5993 if (!EQ (*vecp
++, buf
))
5995 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
5997 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6000 /* Detect deletion of a buffer at the end of the list. */
6001 if (EQ (*vecp
, Qlambda
))
6004 /* Start with 1 so there is room for at least one lambda at the end. */
6006 FOR_EACH_FRAME (tail
, frame
)
6008 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6010 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6011 if (n
> XVECTOR (frame_and_buffer_state
)->size
6012 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6013 /* Add 20 extra so we grow it less often. */
6014 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6015 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6016 FOR_EACH_FRAME (tail
, frame
)
6019 *vecp
++ = XFRAME (frame
)->name
;
6021 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6023 buf
= XCDR (XCAR (tail
));
6024 /* Ignore buffers that aren't included in buffer lists. */
6025 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
6028 *vecp
++ = XBUFFER (buf
)->read_only
;
6029 *vecp
++ = Fbuffer_modified_p (buf
);
6031 /* Fill up the vector with lambdas (always at least one). */
6033 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6034 < XVECTOR (frame_and_buffer_state
)->size
)
6036 /* Make sure we didn't overflow the vector. */
6037 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6038 > XVECTOR (frame_and_buffer_state
)->size
)
6045 /***********************************************************************
6047 ***********************************************************************/
6049 char *terminal_type
;
6051 /* Initialization done when Emacs fork is started, before doing stty.
6052 Determine terminal type and set terminal_driver. Then invoke its
6053 decoding routine to set up variables in the terminal package. */
6058 #ifdef HAVE_X_WINDOWS
6059 extern int display_arg
;
6062 /* Construct the space glyph. */
6063 space_glyph
.type
= CHAR_GLYPH
;
6064 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6065 space_glyph
.charpos
= -1;
6069 cursor_in_echo_area
= 0;
6070 terminal_type
= (char *) 0;
6072 /* Now is the time to initialize this; it's used by init_sys_modes
6074 Vwindow_system
= Qnil
;
6076 /* If the user wants to use a window system, we shouldn't bother
6077 initializing the terminal. This is especially important when the
6078 terminal is so dumb that emacs gives up before and doesn't bother
6079 using the window system.
6081 If the DISPLAY environment variable is set and nonempty,
6082 try to use X, and die with an error message if that doesn't work. */
6084 #ifdef HAVE_X_WINDOWS
6089 display
= getenv ("DECW$DISPLAY");
6091 display
= getenv ("DISPLAY");
6094 display_arg
= (display
!= 0 && *display
!= 0);
6097 if (!inhibit_window_system
&& display_arg
6103 Vwindow_system
= intern ("x");
6105 Vwindow_system_version
= make_number (11);
6107 Vwindow_system_version
= make_number (10);
6109 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
6110 /* In some versions of ncurses,
6111 tputs crashes if we have not called tgetent.
6113 { char b
[2044]; tgetent (b
, "xterm");}
6115 adjust_frame_glyphs_initially ();
6118 #endif /* HAVE_X_WINDOWS */
6121 if (!inhibit_window_system
)
6123 Vwindow_system
= intern ("w32");
6124 Vwindow_system_version
= make_number (1);
6125 adjust_frame_glyphs_initially ();
6128 #endif /* HAVE_NTGUI */
6131 if (!inhibit_window_system
)
6133 Vwindow_system
= intern ("mac");
6134 Vwindow_system_version
= make_number (1);
6135 adjust_frame_glyphs_initially ();
6138 #endif /* macintosh */
6140 /* If no window system has been specified, try to use the terminal. */
6143 fatal ("standard input is not a tty");
6147 /* Look at the TERM variable */
6148 terminal_type
= (char *) getenv ("TERM");
6152 fprintf (stderr
, "Please specify your terminal type.\n\
6153 For types defined in VMS, use set term /device=TYPE.\n\
6154 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6155 \(The quotation marks are necessary since terminal types are lower case.)\n");
6157 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6163 /* VMS DCL tends to up-case things, so down-case term type.
6164 Hardly any uppercase letters in terminal types; should be none. */
6166 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6169 strcpy (new, terminal_type
);
6171 for (p
= new; *p
; p
++)
6175 terminal_type
= new;
6179 term_init (terminal_type
);
6182 struct frame
*sf
= SELECTED_FRAME ();
6183 int width
= FRAME_WINDOW_WIDTH (sf
);
6184 int height
= FRAME_HEIGHT (sf
);
6186 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6188 /* If these sizes are so big they cause overflow, just ignore the
6189 change. It's not clear what better we could do. */
6190 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6191 fatal ("screen size %dx%d too big", width
, height
);
6194 adjust_frame_glyphs_initially ();
6195 calculate_costs (XFRAME (selected_frame
));
6200 #endif /* CANNOT_DUMP */
6201 signal (SIGWINCH
, window_change_signal
);
6202 #endif /* SIGWINCH */
6204 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6208 /* The MSDOS terminal turns on its ``window system'' relatively
6209 late into the startup, so we cannot do the frame faces'
6210 initialization just yet. It will be done later by pc-win.el
6211 and internal_terminal_init. */
6212 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6214 && NILP (Vwindow_system
))
6216 /* For the initial frame, we don't have any way of knowing what
6217 are the foreground and background colors of the terminal. */
6218 struct frame
*sf
= SELECTED_FRAME();
6220 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6221 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6222 call0 (intern ("tty-set-up-initial-frame-faces"));
6228 /***********************************************************************
6230 ***********************************************************************/
6232 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6233 Sinternal_show_cursor
, 2, 2, 0,
6234 "Set the cursor-visibility flag of WINDOW to SHOW.\n\
6235 WINDOW nil means use the selected window. SHOW non-nil means\n\
6236 show a cursor in WINDOW in the next redisplay. SHOW nil means\n\
6237 don't show a cursor.")
6239 Lisp_Object window
, show
;
6241 /* Don't change cursor state while redisplaying. This could confuse
6243 if (!redisplaying_p
)
6246 window
= selected_window
;
6248 CHECK_WINDOW (window
, 2);
6250 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6257 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6258 Sinternal_show_cursor_p
, 0, 1, 0,
6259 "Value is non-nil if next redisplay will display a cursor in WINDOW.\n\
6260 WINDOW nil or omitted means report on the selected window.")
6267 window
= selected_window
;
6269 CHECK_WINDOW (window
, 2);
6271 w
= XWINDOW (window
);
6272 return w
->cursor_off_p
? Qnil
: Qt
;
6276 /***********************************************************************
6278 ***********************************************************************/
6283 defsubr (&Sredraw_frame
);
6284 defsubr (&Sredraw_display
);
6285 defsubr (&Sframe_or_buffer_changed_p
);
6286 defsubr (&Sopen_termscript
);
6288 defsubr (&Ssit_for
);
6289 defsubr (&Ssleep_for
);
6290 defsubr (&Ssend_string_to_terminal
);
6291 defsubr (&Sinternal_show_cursor
);
6292 defsubr (&Sinternal_show_cursor_p
);
6294 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6295 staticpro (&frame_and_buffer_state
);
6297 Qdisplay_table
= intern ("display-table");
6298 staticpro (&Qdisplay_table
);
6299 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6300 staticpro (&Qredisplay_dont_pause
);
6302 DEFVAR_INT ("baud-rate", &baud_rate
,
6303 "*The output baud rate of the terminal.\n\
6304 On most systems, changing this value will affect the amount of padding\n\
6305 and the other strategic decisions made during redisplay.");
6307 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6308 "*Non-nil means invert the entire frame display.\n\
6309 This means everything is in inverse video which otherwise would not be.");
6311 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6312 "*Non-nil means try to flash the frame to represent a bell.");
6314 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6315 "*Non-nil means no need to redraw entire frame after suspending.\n\
6316 A non-nil value is useful if the terminal can automatically preserve\n\
6317 Emacs's frame display when you reenter Emacs.\n\
6318 It is up to you to set this variable if your terminal can do that.");
6320 DEFVAR_LISP ("window-system", &Vwindow_system
,
6321 "A symbol naming the window-system under which Emacs is running\n\
6322 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
6324 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6325 "The version number of the window system in use.\n\
6326 For X windows, this is 10 or 11.");
6328 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6329 "Non-nil means put cursor in minibuffer, at end of any message there.");
6331 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6332 "Table defining how to output a glyph code to the frame.\n\
6333 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
6334 Each element can be:\n\
6335 integer: a glyph code which this glyph is an alias for.\n\
6336 string: output this glyph using that string (not impl. in X windows).\n\
6337 nil: this glyph mod 256 is char code to output,\n\
6338 and this glyph / 256 is face code for X windows (see `face-id').");
6339 Vglyph_table
= Qnil
;
6341 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6342 "Display table to use for buffers that specify none.\n\
6343 See `buffer-display-table' for more information.");
6344 Vstandard_display_table
= Qnil
;
6346 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6347 "*Non-nil means update isn't paused when input is detected.");
6348 redisplay_dont_pause
= 0;
6350 /* Initialize `window-system', unless init_display already decided it. */
6355 Vwindow_system
= Qnil
;
6356 Vwindow_system_version
= Qnil
;