1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005 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"
39 #include "character.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 */
67 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
72 /* To get the prototype for `sleep'. */
78 /* Get number of chars of output now in the buffer of a stdio stream.
79 This ought to be built in in stdio, but it isn't. Some s- files
80 override this because their stdio internals differ. */
82 #ifdef __GNU_LIBRARY__
84 /* The s- file might have overridden the definition with one that
85 works for the system's C library. But we are using the GNU C
86 library, so this is the right definition for every system. */
88 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
91 #undef PENDING_OUTPUT_COUNT
92 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
94 #else /* not __GNU_LIBRARY__ */
95 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
96 #include <stdio_ext.h>
97 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
99 #ifndef PENDING_OUTPUT_COUNT
100 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
102 #endif /* not __GNU_LIBRARY__ */
104 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
105 #include <term.h> /* for tgetent */
108 /* Structure to pass dimensions around. Used for character bounding
109 boxes, glyph matrix dimensions and alike. */
118 /* Function prototypes. */
120 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
121 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
122 static void fake_current_matrices
P_ ((Lisp_Object
));
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, int, int *));
132 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
133 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
134 static void adjust_frame_glyphs
P_ ((struct frame
*));
135 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
136 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
137 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
138 int, int, struct dim
));
139 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
140 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
144 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
145 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
147 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
149 static struct glyph_pool
*new_glyph_pool
P_ ((void));
150 static void free_glyph_pool
P_ ((struct glyph_pool
*));
151 static void adjust_frame_glyphs_initially
P_ ((void));
152 static void adjust_frame_message_buffer
P_ ((struct frame
*));
153 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
154 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
155 static void build_frame_matrix
P_ ((struct frame
*));
156 void clear_current_matrices
P_ ((struct frame
*));
157 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
159 static void clear_window_matrices
P_ ((struct window
*, int));
160 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
161 static int scrolling_window
P_ ((struct window
*, int));
162 static int update_window_line
P_ ((struct window
*, int, int *));
163 static void update_marginal_area
P_ ((struct window
*, int, int));
164 static int update_text_area
P_ ((struct window
*, int));
165 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
167 static void mirror_make_current
P_ ((struct window
*, int));
168 void check_window_matrix_pointers
P_ ((struct window
*));
170 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
171 struct glyph_matrix
*));
173 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
174 static int update_window_tree
P_ ((struct window
*, int));
175 static int update_window
P_ ((struct window
*, int));
176 static int update_frame_1
P_ ((struct frame
*, int, int));
177 static void set_window_cursor_after_update
P_ ((struct window
*));
178 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
179 struct glyph_row
*, int));
180 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
181 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
182 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
183 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
184 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
185 struct window
*frame_row_to_window
P_ ((struct window
*, int));
188 /* Non-zero means don't pause redisplay for pending input. (This is
189 for debugging and for a future implementation of EDT-like
192 int redisplay_dont_pause
;
194 /* Nonzero upon entry to redisplay means do not assume anything about
195 current contents of actual terminal frame; clear and redraw it. */
199 /* Nonzero means last display completed. Zero means it was preempted. */
201 int display_completed
;
203 /* Lisp variable visible-bell; enables use of screen-flash instead of
208 /* Invert the color of the whole frame, at a low level. */
212 /* Line speed of the terminal. */
216 /* Either nil or a symbol naming the window system under which Emacs
219 Lisp_Object Vwindow_system
;
221 /* Version number of X windows: 10, 11 or nil. */
223 Lisp_Object Vwindow_system_version
;
225 /* Vector of glyph definitions. Indexed by glyph number, the contents
226 are a string which is how to output the glyph.
228 If Vglyph_table is nil, a glyph is output by using its low 8 bits
231 This is an obsolete feature that is no longer used. The variable
232 is retained for compatibility. */
234 Lisp_Object Vglyph_table
;
236 /* Display table to use for vectors that don't specify their own. */
238 Lisp_Object Vstandard_display_table
;
240 /* Nonzero means reading single-character input with prompt so put
241 cursor on mini-buffer after the prompt. Positive means at end of
242 text in echo area; negative means at beginning of line. */
244 int cursor_in_echo_area
;
246 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
249 /* The currently selected frame. In a single-frame version, this
250 variable always equals the_only_frame. */
252 Lisp_Object selected_frame
;
254 /* A frame which is not just a mini-buffer, or 0 if there are no such
255 frames. This is usually the most recent such frame that was
256 selected. In a single-frame version, this variable always holds
257 the address of the_only_frame. */
259 struct frame
*last_nonminibuf_frame
;
261 /* Stdio stream being used for copy of all output. */
265 /* Structure for info on cursor positioning. */
269 /* 1 means SIGWINCH happened when not safe. */
271 int delayed_size_change
;
273 /* 1 means glyph initialization has been completed at startup. */
275 static int glyphs_initialized_initially_p
;
277 /* Updated window if != 0. Set by update_window. */
279 struct window
*updated_window
;
281 /* Glyph row updated in update_window_line, and area that is updated. */
283 struct glyph_row
*updated_row
;
286 /* A glyph for a space. */
288 struct glyph space_glyph
;
290 /* Non-zero means update has been performed directly, so that there's
291 no need for redisplay_internal to do much work. Set by
292 direct_output_for_insert. */
294 int redisplay_performed_directly_p
;
296 /* Counts of allocated structures. These counts serve to diagnose
297 memory leaks and double frees. */
299 int glyph_matrix_count
;
300 int glyph_pool_count
;
302 /* If non-null, the frame whose frame matrices are manipulated. If
303 null, window matrices are worked on. */
305 static struct frame
*frame_matrix_frame
;
307 /* Current interface for window-based redisplay. Set from init_xterm.
308 A null value means we are not using window-based redisplay. */
310 struct redisplay_interface
*rif
;
312 /* Non-zero means that fonts have been loaded since the last glyph
313 matrix adjustments. Redisplay must stop, and glyph matrices must
314 be adjusted when this flag becomes non-zero during display. The
315 reason fonts can be loaded so late is that fonts of fontsets are
320 /* Convert vpos and hpos from frame to window and vice versa.
321 This may only be used for terminal frames. */
325 static int window_to_frame_vpos
P_ ((struct window
*, int));
326 static int window_to_frame_hpos
P_ ((struct window
*, int));
327 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
328 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
330 /* One element of the ring buffer containing redisplay history
333 struct redisplay_history
335 char trace
[512 + 100];
338 /* The size of the history buffer. */
340 #define REDISPLAY_HISTORY_SIZE 30
342 /* The redisplay history buffer. */
344 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
346 /* Next free entry in redisplay_history. */
348 static int history_idx
;
350 /* A tick that's incremented each time something is added to the
353 static unsigned history_tick
;
355 static void add_frame_display_history
P_ ((struct frame
*, int));
356 static void add_window_display_history
P_ ((struct window
*, char *, int));
359 /* Add to the redisplay history how window W has been displayed.
360 MSG is a trace containing the information how W's glyph matrix
361 has been constructed. PAUSED_P non-zero means that the update
362 has been interrupted for pending input. */
365 add_window_display_history (w
, msg
, paused_p
)
372 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
374 buf
= redisplay_history
[history_idx
].trace
;
377 sprintf (buf
, "%d: window %p (`%s')%s\n",
380 ((BUFFERP (w
->buffer
)
381 && STRINGP (XBUFFER (w
->buffer
)->name
))
382 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
384 paused_p
? " ***paused***" : "");
389 /* Add to the redisplay history that frame F has been displayed.
390 PAUSED_P non-zero means that the update has been interrupted for
394 add_frame_display_history (f
, paused_p
)
400 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
402 buf
= redisplay_history
[history_idx
].trace
;
405 sprintf (buf
, "%d: update frame %p%s",
407 f
, paused_p
? " ***paused***" : "");
411 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
412 Sdump_redisplay_history
, 0, 0, "",
413 doc
: /* Dump redisplay history to stderr. */)
418 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
421 i
= REDISPLAY_HISTORY_SIZE
- 1;
422 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
429 #else /* GLYPH_DEBUG == 0 */
431 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
432 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
434 #endif /* GLYPH_DEBUG == 0 */
437 /* Like bcopy except never gets confused by overlap. Let this be the
438 first function defined in this file, or change emacs.c where the
439 address of this function is used. */
442 safe_bcopy (from
, to
, size
)
447 if (size
<= 0 || from
== to
)
450 /* If the source and destination don't overlap, then bcopy can
451 handle it. If they do overlap, but the destination is lower in
452 memory than the source, we'll assume bcopy can handle that. */
453 if (to
< from
|| from
+ size
<= to
)
454 bcopy (from
, to
, size
);
456 /* Otherwise, we'll copy from the end. */
459 register const char *endf
= from
+ size
;
460 register char *endt
= to
+ size
;
462 /* If TO - FROM is large, then we should break the copy into
463 nonoverlapping chunks of TO - FROM bytes each. However, if
464 TO - FROM is small, then the bcopy function call overhead
465 makes this not worth it. The crossover point could be about
466 anywhere. Since I don't think the obvious copy loop is too
467 bad, I'm trying to err in its favor. */
472 while (endf
!= from
);
484 bcopy (endf
, endt
, to
- from
);
487 /* If SIZE wasn't a multiple of TO - FROM, there will be a
488 little left over. The amount left over is (endt + (to -
489 from)) - to, which is endt - from. */
490 bcopy (from
, to
, endt
- from
);
497 /***********************************************************************
499 ***********************************************************************/
501 /* Allocate and return a glyph_matrix structure. POOL is the glyph
502 pool from which memory for the matrix should be allocated, or null
503 for window-based redisplay where no glyph pools are used. The
504 member `pool' of the glyph matrix structure returned is set to
505 POOL, the structure is otherwise zeroed. */
507 struct glyph_matrix
*
508 new_glyph_matrix (pool
)
509 struct glyph_pool
*pool
;
511 struct glyph_matrix
*result
;
513 /* Allocate and clear. */
514 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
515 bzero (result
, sizeof *result
);
517 /* Increment number of allocated matrices. This count is used
518 to detect memory leaks. */
519 ++glyph_matrix_count
;
521 /* Set pool and return. */
527 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
529 The global counter glyph_matrix_count is decremented when a matrix
530 is freed. If the count gets negative, more structures were freed
531 than allocated, i.e. one matrix was freed more than once or a bogus
532 pointer was passed to this function.
534 If MATRIX->pool is null, this means that the matrix manages its own
535 glyph memory---this is done for matrices on X frames. Freeing the
536 matrix also frees the glyph memory in this case. */
539 free_glyph_matrix (matrix
)
540 struct glyph_matrix
*matrix
;
546 /* Detect the case that more matrices are freed than were
548 if (--glyph_matrix_count
< 0)
551 /* Free glyph memory if MATRIX owns it. */
552 if (matrix
->pool
== NULL
)
553 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
554 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
556 /* Free row structures and the matrix itself. */
557 xfree (matrix
->rows
);
563 /* Return the number of glyphs to reserve for a marginal area of
564 window W. TOTAL_GLYPHS is the number of glyphs in a complete
565 display line of window W. MARGIN gives the width of the marginal
566 area in canonical character units. MARGIN should be an integer
570 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
577 if (NUMBERP (margin
))
579 int width
= XFASTINT (w
->total_cols
);
580 double d
= max (0, XFLOATINT (margin
));
581 d
= min (width
/ 2 - 1, d
);
582 n
= (int) ((double) total_glyphs
/ width
* d
);
591 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
594 W is null if the function is called for a frame glyph matrix.
595 Otherwise it is the window MATRIX is a member of. X and Y are the
596 indices of the first column and row of MATRIX within the frame
597 matrix, if such a matrix exists. They are zero for purely
598 window-based redisplay. DIM is the needed size of the matrix.
600 In window-based redisplay, where no frame matrices exist, glyph
601 matrices manage their own glyph storage. Otherwise, they allocate
602 storage from a common frame glyph pool which can be found in
605 The reason for this memory management strategy is to avoid complete
606 frame redraws if possible. When we allocate from a common pool, a
607 change of the location or size of a sub-matrix within the pool
608 requires a complete redisplay of the frame because we cannot easily
609 make sure that the current matrices of all windows still agree with
610 what is displayed on the screen. While this is usually fast, it
611 leads to screen flickering. */
614 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
616 struct glyph_matrix
*matrix
;
622 int marginal_areas_changed_p
= 0;
623 int header_line_changed_p
= 0;
624 int header_line_p
= 0;
625 int left
= -1, right
= -1;
626 int window_width
= -1, window_height
;
628 /* See if W had a header line that has disappeared now, or vice versa.
632 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
634 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
635 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
637 matrix
->header_line_p
= header_line_p
;
639 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
640 Do nothing if MATRIX' size, position, vscroll, and marginal areas
641 haven't changed. This optimization is important because preserving
642 the matrix means preventing redisplay. */
643 if (matrix
->pool
== NULL
)
645 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
646 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
647 xassert (left
>= 0 && right
>= 0);
648 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
649 || right
!= matrix
->right_margin_glyphs
);
651 if (!marginal_areas_changed_p
653 && !header_line_changed_p
654 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
655 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
656 && matrix
->window_height
== window_height
657 && matrix
->window_vscroll
== w
->vscroll
658 && matrix
->window_width
== window_width
)
662 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
663 if (matrix
->rows_allocated
< dim
.height
)
665 int size
= dim
.height
* sizeof (struct glyph_row
);
666 new_rows
= dim
.height
- matrix
->rows_allocated
;
667 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
668 bzero (matrix
->rows
+ matrix
->rows_allocated
,
669 new_rows
* sizeof *matrix
->rows
);
670 matrix
->rows_allocated
= dim
.height
;
675 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
676 on a frame not using window-based redisplay. Set up pointers for
677 each row into the glyph pool. */
680 xassert (matrix
->pool
->glyphs
);
684 left
= margin_glyphs_to_reserve (w
, dim
.width
,
685 w
->left_margin_cols
);
686 right
= margin_glyphs_to_reserve (w
, dim
.width
,
687 w
->right_margin_cols
);
692 for (i
= 0; i
< dim
.height
; ++i
)
694 struct glyph_row
*row
= &matrix
->rows
[i
];
696 row
->glyphs
[LEFT_MARGIN_AREA
]
697 = (matrix
->pool
->glyphs
698 + (y
+ i
) * matrix
->pool
->ncolumns
702 || row
== matrix
->rows
+ dim
.height
- 1
703 || (row
== matrix
->rows
&& matrix
->header_line_p
))
705 row
->glyphs
[TEXT_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
];
707 row
->glyphs
[RIGHT_MARGIN_AREA
]
708 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
709 row
->glyphs
[LAST_AREA
]
710 = row
->glyphs
[RIGHT_MARGIN_AREA
];
714 row
->glyphs
[TEXT_AREA
]
715 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
716 row
->glyphs
[RIGHT_MARGIN_AREA
]
717 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
718 row
->glyphs
[LAST_AREA
]
719 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
723 matrix
->left_margin_glyphs
= left
;
724 matrix
->right_margin_glyphs
= right
;
728 /* If MATRIX->pool is null, MATRIX is responsible for managing
729 its own memory. It is a window matrix for window-based redisplay.
730 Allocate glyph memory from the heap. */
731 if (dim
.width
> matrix
->matrix_w
733 || header_line_changed_p
734 || marginal_areas_changed_p
)
736 struct glyph_row
*row
= matrix
->rows
;
737 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
741 row
->glyphs
[LEFT_MARGIN_AREA
]
742 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
744 * sizeof (struct glyph
)));
746 /* The mode line never has marginal areas. */
747 if (row
== matrix
->rows
+ dim
.height
- 1
748 || (row
== matrix
->rows
&& matrix
->header_line_p
))
750 row
->glyphs
[TEXT_AREA
]
751 = row
->glyphs
[LEFT_MARGIN_AREA
];
752 row
->glyphs
[RIGHT_MARGIN_AREA
]
753 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
754 row
->glyphs
[LAST_AREA
]
755 = row
->glyphs
[RIGHT_MARGIN_AREA
];
759 row
->glyphs
[TEXT_AREA
]
760 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
761 row
->glyphs
[RIGHT_MARGIN_AREA
]
762 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
763 row
->glyphs
[LAST_AREA
]
764 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
770 xassert (left
>= 0 && right
>= 0);
771 matrix
->left_margin_glyphs
= left
;
772 matrix
->right_margin_glyphs
= right
;
775 /* Number of rows to be used by MATRIX. */
776 matrix
->nrows
= dim
.height
;
777 xassert (matrix
->nrows
>= 0);
781 if (matrix
== w
->current_matrix
)
783 /* Mark rows in a current matrix of a window as not having
784 valid contents. It's important to not do this for
785 desired matrices. When Emacs starts, it may already be
786 building desired matrices when this function runs. */
787 if (window_width
< 0)
788 window_width
= window_box_width (w
, -1);
790 /* Optimize the case that only the height has changed (C-x 2,
791 upper window). Invalidate all rows that are no longer part
793 if (!marginal_areas_changed_p
794 && !header_line_changed_p
796 && dim
.width
== matrix
->matrix_w
797 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
798 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
799 && matrix
->window_width
== window_width
)
801 /* Find the last row in the window. */
802 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
803 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
809 /* Window end is invalid, if inside of the rows that
810 are invalidated below. */
811 if (INTEGERP (w
->window_end_vpos
)
812 && XFASTINT (w
->window_end_vpos
) >= i
)
813 w
->window_end_valid
= Qnil
;
815 while (i
< matrix
->nrows
)
816 matrix
->rows
[i
++].enabled_p
= 0;
820 for (i
= 0; i
< matrix
->nrows
; ++i
)
821 matrix
->rows
[i
].enabled_p
= 0;
824 else if (matrix
== w
->desired_matrix
)
826 /* Rows in desired matrices always have to be cleared;
827 redisplay expects this is the case when it runs, so it
828 had better be the case when we adjust matrices between
830 for (i
= 0; i
< matrix
->nrows
; ++i
)
831 matrix
->rows
[i
].enabled_p
= 0;
836 /* Remember last values to be able to optimize frame redraws. */
837 matrix
->matrix_x
= x
;
838 matrix
->matrix_y
= y
;
839 matrix
->matrix_w
= dim
.width
;
840 matrix
->matrix_h
= dim
.height
;
842 /* Record the top y location and height of W at the time the matrix
843 was last adjusted. This is used to optimize redisplay above. */
846 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
847 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
848 matrix
->window_height
= window_height
;
849 matrix
->window_width
= window_width
;
850 matrix
->window_vscroll
= w
->vscroll
;
855 /* Reverse the contents of rows in MATRIX between START and END. The
856 contents of the row at END - 1 end up at START, END - 2 at START +
857 1 etc. This is part of the implementation of rotate_matrix (see
861 reverse_rows (matrix
, start
, end
)
862 struct glyph_matrix
*matrix
;
867 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
869 /* Non-ISO HP/UX compiler doesn't like auto struct
871 struct glyph_row temp
;
872 temp
= matrix
->rows
[i
];
873 matrix
->rows
[i
] = matrix
->rows
[j
];
874 matrix
->rows
[j
] = temp
;
879 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
880 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
881 indices. (Note: this does not copy glyphs, only glyph pointers in
882 row structures are moved around).
884 The algorithm used for rotating the vector was, I believe, first
885 described by Kernighan. See the vector R as consisting of two
886 sub-vectors AB, where A has length BY for BY >= 0. The result
887 after rotating is then BA. Reverse both sub-vectors to get ArBr
888 and reverse the result to get (ArBr)r which is BA. Similar for
892 rotate_matrix (matrix
, first
, last
, by
)
893 struct glyph_matrix
*matrix
;
898 /* Up (rotate left, i.e. towards lower indices). */
900 reverse_rows (matrix
, first
, first
+ by
);
901 reverse_rows (matrix
, first
+ by
, last
);
902 reverse_rows (matrix
, first
, last
);
906 /* Down (rotate right, i.e. towards higher indices). */
907 reverse_rows (matrix
, last
- by
, last
);
908 reverse_rows (matrix
, first
, last
- by
);
909 reverse_rows (matrix
, first
, last
);
914 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
915 with indices START <= index < END. Increment positions by DELTA/
919 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
920 struct glyph_matrix
*matrix
;
921 int start
, end
, delta
, delta_bytes
;
923 /* Check that START and END are reasonable values. */
924 xassert (start
>= 0 && start
<= matrix
->nrows
);
925 xassert (end
>= 0 && end
<= matrix
->nrows
);
926 xassert (start
<= end
);
928 for (; start
< end
; ++start
)
929 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
933 /* Enable a range of rows in glyph matrix MATRIX. START and END are
934 the row indices of the first and last + 1 row to enable. If
935 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
938 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
939 struct glyph_matrix
*matrix
;
943 xassert (start
<= end
);
944 xassert (start
>= 0 && start
< matrix
->nrows
);
945 xassert (end
>= 0 && end
<= matrix
->nrows
);
947 for (; start
< end
; ++start
)
948 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
954 This empties all rows in MATRIX by setting the enabled_p flag for
955 all rows of the matrix to zero. The function prepare_desired_row
956 will eventually really clear a row when it sees one with a zero
959 Resets update hints to defaults value. The only update hint
960 currently present is the flag MATRIX->no_scrolling_p. */
963 clear_glyph_matrix (matrix
)
964 struct glyph_matrix
*matrix
;
968 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
969 matrix
->no_scrolling_p
= 0;
974 /* Shift part of the glyph matrix MATRIX of window W up or down.
975 Increment y-positions in glyph rows between START and END by DY,
976 and recompute their visible height. */
979 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
981 struct glyph_matrix
*matrix
;
986 xassert (start
<= end
);
987 xassert (start
>= 0 && start
< matrix
->nrows
);
988 xassert (end
>= 0 && end
<= matrix
->nrows
);
990 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
991 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
993 for (; start
< end
; ++start
)
995 struct glyph_row
*row
= &matrix
->rows
[start
];
998 row
->visible_height
= row
->height
;
1001 row
->visible_height
-= min_y
- row
->y
;
1002 if (row
->y
+ row
->height
> max_y
)
1003 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1008 /* Mark all rows in current matrices of frame F as invalid. Marking
1009 invalid is done by setting enabled_p to zero for all rows in a
1013 clear_current_matrices (f
)
1014 register struct frame
*f
;
1016 /* Clear frame current matrix, if we have one. */
1017 if (f
->current_matrix
)
1018 clear_glyph_matrix (f
->current_matrix
);
1020 /* Clear the matrix of the menu bar window, if such a window exists.
1021 The menu bar window is currently used to display menus on X when
1022 no toolkit support is compiled in. */
1023 if (WINDOWP (f
->menu_bar_window
))
1024 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1026 /* Clear the matrix of the tool-bar window, if any. */
1027 if (WINDOWP (f
->tool_bar_window
))
1028 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1030 /* Clear current window matrices. */
1031 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1032 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1036 /* Clear out all display lines of F for a coming redisplay. */
1039 clear_desired_matrices (f
)
1040 register struct frame
*f
;
1042 if (f
->desired_matrix
)
1043 clear_glyph_matrix (f
->desired_matrix
);
1045 if (WINDOWP (f
->menu_bar_window
))
1046 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1048 if (WINDOWP (f
->tool_bar_window
))
1049 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1051 /* Do it for window matrices. */
1052 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1053 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1057 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1058 non-zero clear desired matrices, otherwise clear current matrices. */
1061 clear_window_matrices (w
, desired_p
)
1067 if (!NILP (w
->hchild
))
1069 xassert (WINDOWP (w
->hchild
));
1070 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1072 else if (!NILP (w
->vchild
))
1074 xassert (WINDOWP (w
->vchild
));
1075 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1080 clear_glyph_matrix (w
->desired_matrix
);
1083 clear_glyph_matrix (w
->current_matrix
);
1084 w
->window_end_valid
= Qnil
;
1088 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1094 /***********************************************************************
1097 See dispextern.h for an overall explanation of glyph rows.
1098 ***********************************************************************/
1100 /* Clear glyph row ROW. Do it in a way that makes it robust against
1101 changes in the glyph_row structure, i.e. addition or removal of
1102 structure members. */
1104 static struct glyph_row null_row
;
1107 clear_glyph_row (row
)
1108 struct glyph_row
*row
;
1110 struct glyph
*p
[1 + LAST_AREA
];
1112 /* Save pointers. */
1113 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1114 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1115 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1116 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1121 /* Restore pointers. */
1122 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1123 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1124 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1125 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1127 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1128 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1129 Redisplay outputs such glyphs, and flickering effects were
1130 the result. This also depended on the contents of memory
1131 returned by xmalloc. If flickering happens again, activate
1132 the code below. If the flickering is gone with that, chances
1133 are that the flickering has the same reason as here. */
1134 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1139 /* Make ROW an empty, enabled row of canonical character height,
1140 in window W starting at y-position Y. */
1143 blank_row (w
, row
, y
)
1145 struct glyph_row
*row
;
1150 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1151 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1153 clear_glyph_row (row
);
1155 row
->ascent
= row
->phys_ascent
= 0;
1156 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1157 row
->visible_height
= row
->height
;
1160 row
->visible_height
-= min_y
- row
->y
;
1161 if (row
->y
+ row
->height
> max_y
)
1162 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1168 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1169 are the amounts by which to change positions. Note that the first
1170 glyph of the text area of a row can have a buffer position even if
1171 the used count of the text area is zero. Such rows display line
1175 increment_row_positions (row
, delta
, delta_bytes
)
1176 struct glyph_row
*row
;
1177 int delta
, delta_bytes
;
1181 /* Increment start and end positions. */
1182 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1183 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1184 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1185 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1187 /* Increment positions in glyphs. */
1188 for (area
= 0; area
< LAST_AREA
; ++area
)
1189 for (i
= 0; i
< row
->used
[area
]; ++i
)
1190 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1191 && row
->glyphs
[area
][i
].charpos
> 0)
1192 row
->glyphs
[area
][i
].charpos
+= delta
;
1194 /* Capture the case of rows displaying a line end. */
1195 if (row
->used
[TEXT_AREA
] == 0
1196 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1197 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1202 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1203 contents, i.e. glyph structure contents are exchanged between A and
1204 B without changing glyph pointers in A and B. */
1207 swap_glyphs_in_rows (a
, b
)
1208 struct glyph_row
*a
, *b
;
1212 for (area
= 0; area
< LAST_AREA
; ++area
)
1214 /* Number of glyphs to swap. */
1215 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1217 /* Start of glyphs in area of row A. */
1218 struct glyph
*glyph_a
= a
->glyphs
[area
];
1220 /* End + 1 of glyphs in area of row A. */
1221 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1223 /* Start of glyphs in area of row B. */
1224 struct glyph
*glyph_b
= b
->glyphs
[area
];
1226 while (glyph_a
< glyph_a_end
)
1228 /* Non-ISO HP/UX compiler doesn't like auto struct
1232 *glyph_a
= *glyph_b
;
1242 /* Exchange pointers to glyph memory between glyph rows A and B. */
1245 swap_glyph_pointers (a
, b
)
1246 struct glyph_row
*a
, *b
;
1249 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1251 struct glyph
*temp
= a
->glyphs
[i
];
1252 a
->glyphs
[i
] = b
->glyphs
[i
];
1253 b
->glyphs
[i
] = temp
;
1258 /* Copy glyph row structure FROM to glyph row structure TO, except
1259 that glyph pointers in the structures are left unchanged. */
1262 copy_row_except_pointers (to
, from
)
1263 struct glyph_row
*to
, *from
;
1265 struct glyph
*pointers
[1 + LAST_AREA
];
1267 /* Save glyph pointers of TO. */
1268 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1270 /* Do a structure assignment. */
1273 /* Restore original pointers of TO. */
1274 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1278 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1279 TO and FROM are left unchanged. Glyph contents are copied from the
1280 glyph memory of FROM to the glyph memory of TO. Increment buffer
1281 positions in row TO by DELTA/ DELTA_BYTES. */
1284 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1285 struct glyph_row
*to
, *from
;
1286 int delta
, delta_bytes
;
1290 /* This is like a structure assignment TO = FROM, except that
1291 glyph pointers in the rows are left unchanged. */
1292 copy_row_except_pointers (to
, from
);
1294 /* Copy glyphs from FROM to TO. */
1295 for (area
= 0; area
< LAST_AREA
; ++area
)
1296 if (from
->used
[area
])
1297 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1298 from
->used
[area
] * sizeof (struct glyph
));
1300 /* Increment buffer positions in TO by DELTA. */
1301 increment_row_positions (to
, delta
, delta_bytes
);
1305 /* Assign glyph row FROM to glyph row TO. This works like a structure
1306 assignment TO = FROM, except that glyph pointers are not copied but
1307 exchanged between TO and FROM. Pointers must be exchanged to avoid
1311 assign_row (to
, from
)
1312 struct glyph_row
*to
, *from
;
1314 swap_glyph_pointers (to
, from
);
1315 copy_row_except_pointers (to
, from
);
1319 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1320 a row in a window matrix, is a slice of the glyph memory of the
1321 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1322 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1323 memory of FRAME_ROW. */
1328 glyph_row_slice_p (window_row
, frame_row
)
1329 struct glyph_row
*window_row
, *frame_row
;
1331 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1332 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1333 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1335 return (frame_glyph_start
<= window_glyph_start
1336 && window_glyph_start
< frame_glyph_end
);
1339 #endif /* GLYPH_DEBUG */
1343 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1344 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1345 in WINDOW_MATRIX is found satisfying the condition. */
1347 static struct glyph_row
*
1348 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1349 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1354 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1356 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1357 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1358 frame_matrix
->rows
+ row
))
1361 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1366 /* Prepare ROW for display. Desired rows are cleared lazily,
1367 i.e. they are only marked as to be cleared by setting their
1368 enabled_p flag to zero. When a row is to be displayed, a prior
1369 call to this function really clears it. */
1372 prepare_desired_row (row
)
1373 struct glyph_row
*row
;
1375 if (!row
->enabled_p
)
1377 clear_glyph_row (row
);
1383 /* Return a hash code for glyph row ROW. */
1386 line_hash_code (row
)
1387 struct glyph_row
*row
;
1393 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1394 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1398 int c
= glyph
->u
.ch
;
1399 int face_id
= glyph
->face_id
;
1400 if (must_write_spaces
)
1402 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1403 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1415 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1416 the number of characters in the line. If must_write_spaces is
1417 zero, leading and trailing spaces are ignored. */
1420 line_draw_cost (matrix
, vpos
)
1421 struct glyph_matrix
*matrix
;
1424 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1425 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1426 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1428 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1429 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1431 /* Ignore trailing and leading spaces if we can. */
1432 if (!must_write_spaces
)
1434 /* Skip from the end over trailing spaces. */
1435 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1438 /* All blank line. */
1442 /* Skip over leading spaces. */
1443 while (CHAR_GLYPH_SPACE_P (*beg
))
1447 /* If we don't have a glyph-table, each glyph is one character,
1448 so return the number of glyphs. */
1449 if (glyph_table_base
== 0)
1453 /* Otherwise, scan the glyphs and accumulate their total length
1458 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1461 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1464 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1474 /* Test two glyph rows A and B for equality. Value is non-zero if A
1475 and B have equal contents. W is the window to which the glyphs
1476 rows A and B belong. It is needed here to test for partial row
1477 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1478 flags of A and B, too. */
1481 row_equal_p (w
, a
, b
, mouse_face_p
)
1483 struct glyph_row
*a
, *b
;
1488 else if (a
->hash
!= b
->hash
)
1492 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1495 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1498 /* Compare glyphs. */
1499 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1501 if (a
->used
[area
] != b
->used
[area
])
1504 a_glyph
= a
->glyphs
[area
];
1505 a_end
= a_glyph
+ a
->used
[area
];
1506 b_glyph
= b
->glyphs
[area
];
1508 while (a_glyph
< a_end
1509 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1510 ++a_glyph
, ++b_glyph
;
1512 if (a_glyph
!= a_end
)
1516 if (a
->fill_line_p
!= b
->fill_line_p
1517 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1518 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1519 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1520 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1521 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1522 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1523 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1524 || a
->overlapped_p
!= b
->overlapped_p
1525 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1526 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1527 /* Different partially visible characters on left margin. */
1529 /* Different height. */
1530 || a
->ascent
!= b
->ascent
1531 || a
->phys_ascent
!= b
->phys_ascent
1532 || a
->phys_height
!= b
->phys_height
1533 || a
->visible_height
!= b
->visible_height
)
1542 /***********************************************************************
1545 See dispextern.h for an overall explanation of glyph pools.
1546 ***********************************************************************/
1548 /* Allocate a glyph_pool structure. The structure returned is
1549 initialized with zeros. The global variable glyph_pool_count is
1550 incremented for each pool allocated. */
1552 static struct glyph_pool
*
1555 struct glyph_pool
*result
;
1557 /* Allocate a new glyph_pool and clear it. */
1558 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1559 bzero (result
, sizeof *result
);
1561 /* For memory leak and double deletion checking. */
1568 /* Free a glyph_pool structure POOL. The function may be called with
1569 a null POOL pointer. The global variable glyph_pool_count is
1570 decremented with every pool structure freed. If this count gets
1571 negative, more structures were freed than allocated, i.e. one
1572 structure must have been freed more than once or a bogus pointer
1573 was passed to free_glyph_pool. */
1576 free_glyph_pool (pool
)
1577 struct glyph_pool
*pool
;
1581 /* More freed than allocated? */
1583 xassert (glyph_pool_count
>= 0);
1585 xfree (pool
->glyphs
);
1591 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1592 columns we need. This function never shrinks a pool. The only
1593 case in which this would make sense, would be when a frame's size
1594 is changed from a large value to a smaller one. But, if someone
1595 does it once, we can expect that he will do it again.
1597 Value is non-zero if the pool changed in a way which makes
1598 re-adjusting window glyph matrices necessary. */
1601 realloc_glyph_pool (pool
, matrix_dim
)
1602 struct glyph_pool
*pool
;
1603 struct dim matrix_dim
;
1608 changed_p
= (pool
->glyphs
== 0
1609 || matrix_dim
.height
!= pool
->nrows
1610 || matrix_dim
.width
!= pool
->ncolumns
);
1612 /* Enlarge the glyph pool. */
1613 needed
= matrix_dim
.width
* matrix_dim
.height
;
1614 if (needed
> pool
->nglyphs
)
1616 int size
= needed
* sizeof (struct glyph
);
1619 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1622 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1623 bzero (pool
->glyphs
, size
);
1626 pool
->nglyphs
= needed
;
1629 /* Remember the number of rows and columns because (a) we use them
1630 to do sanity checks, and (b) the number of columns determines
1631 where rows in the frame matrix start---this must be available to
1632 determine pointers to rows of window sub-matrices. */
1633 pool
->nrows
= matrix_dim
.height
;
1634 pool
->ncolumns
= matrix_dim
.width
;
1641 /***********************************************************************
1643 ***********************************************************************/
1648 /* Flush standard output. This is sometimes useful to call from
1658 /* Check that no glyph pointers have been lost in MATRIX. If a
1659 pointer has been lost, e.g. by using a structure assignment between
1660 rows, at least one pointer must occur more than once in the rows of
1664 check_matrix_pointer_lossage (matrix
)
1665 struct glyph_matrix
*matrix
;
1669 for (i
= 0; i
< matrix
->nrows
; ++i
)
1670 for (j
= 0; j
< matrix
->nrows
; ++j
)
1672 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1673 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1677 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1680 matrix_row (matrix
, row
)
1681 struct glyph_matrix
*matrix
;
1684 xassert (matrix
&& matrix
->rows
);
1685 xassert (row
>= 0 && row
< matrix
->nrows
);
1687 /* That's really too slow for normal testing because this function
1688 is called almost everywhere. Although---it's still astonishingly
1689 fast, so it is valuable to have for debugging purposes. */
1691 check_matrix_pointer_lossage (matrix
);
1694 return matrix
->rows
+ row
;
1698 #if 0 /* This function makes invalid assumptions when text is
1699 partially invisible. But it might come handy for debugging
1702 /* Check invariants that must hold for an up to date current matrix of
1706 check_matrix_invariants (w
)
1709 struct glyph_matrix
*matrix
= w
->current_matrix
;
1710 int yb
= window_text_bottom_y (w
);
1711 struct glyph_row
*row
= matrix
->rows
;
1712 struct glyph_row
*last_text_row
= NULL
;
1713 struct buffer
*saved
= current_buffer
;
1714 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1717 /* This can sometimes happen for a fresh window. */
1718 if (matrix
->nrows
< 2)
1721 set_buffer_temp (buffer
);
1723 /* Note: last row is always reserved for the mode line. */
1724 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1725 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1727 struct glyph_row
*next
= row
+ 1;
1729 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1730 last_text_row
= row
;
1732 /* Check that character and byte positions are in sync. */
1733 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1734 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1736 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1737 have such a position temporarily in case of a minibuffer
1738 displaying something like `[Sole completion]' at its end. */
1739 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1740 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1741 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1743 /* Check that end position of `row' is equal to start position
1745 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1747 xassert (MATRIX_ROW_END_CHARPOS (row
)
1748 == MATRIX_ROW_START_CHARPOS (next
));
1749 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1750 == MATRIX_ROW_START_BYTEPOS (next
));
1755 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1756 xassert (w
->desired_matrix
->rows
!= NULL
);
1757 set_buffer_temp (saved
);
1762 #endif /* GLYPH_DEBUG != 0 */
1766 /**********************************************************************
1767 Allocating/ Adjusting Glyph Matrices
1768 **********************************************************************/
1770 /* Allocate glyph matrices over a window tree for a frame-based
1773 X and Y are column/row within the frame glyph matrix where
1774 sub-matrices for the window tree rooted at WINDOW must be
1775 allocated. CH_DIM contains the dimensions of the smallest
1776 character that could be used during display. DIM_ONLY_P non-zero
1777 means that the caller of this function is only interested in the
1778 result matrix dimension, and matrix adjustments should not be
1781 The function returns the total width/height of the sub-matrices of
1782 the window tree. If called on a frame root window, the computation
1783 will take the mini-buffer window into account.
1785 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1787 NEW_LEAF_MATRIX set if any window in the tree did not have a
1788 glyph matrices yet, and
1790 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1791 any window in the tree will be changed or have been changed (see
1794 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1797 Windows are arranged into chains of windows on the same level
1798 through the next fields of window structures. Such a level can be
1799 either a sequence of horizontally adjacent windows from left to
1800 right, or a sequence of vertically adjacent windows from top to
1801 bottom. Each window in a horizontal sequence can be either a leaf
1802 window or a vertical sequence; a window in a vertical sequence can
1803 be either a leaf or a horizontal sequence. All windows in a
1804 horizontal sequence have the same height, and all windows in a
1805 vertical sequence have the same width.
1807 This function uses, for historical reasons, a more general
1808 algorithm to determine glyph matrix dimensions that would be
1811 The matrix height of a horizontal sequence is determined by the
1812 maximum height of any matrix in the sequence. The matrix width of
1813 a horizontal sequence is computed by adding up matrix widths of
1814 windows in the sequence.
1816 |<------- result width ------->|
1817 +---------+----------+---------+ ---
1820 +---------+ | | result height
1825 The matrix width of a vertical sequence is the maximum matrix width
1826 of any window in the sequence. Its height is computed by adding up
1827 matrix heights of windows in the sequence.
1829 |<---- result width -->|
1837 +------------+---------+ |
1840 +------------+---------+ --- */
1842 /* Bit indicating that a new matrix will be allocated or has been
1845 #define NEW_LEAF_MATRIX (1 << 0)
1847 /* Bit indicating that a matrix will or has changed its location or
1850 #define CHANGED_LEAF_MATRIX (1 << 1)
1853 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1854 window_change_flags
)
1858 int *window_change_flags
;
1860 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1862 int wmax
= 0, hmax
= 0;
1866 int in_horz_combination_p
;
1868 /* What combination is WINDOW part of? Compute this once since the
1869 result is the same for all windows in the `next' chain. The
1870 special case of a root window (parent equal to nil) is treated
1871 like a vertical combination because a root window's `next'
1872 points to the mini-buffer window, if any, which is arranged
1873 vertically below other windows. */
1874 in_horz_combination_p
1875 = (!NILP (XWINDOW (window
)->parent
)
1876 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1878 /* For WINDOW and all windows on the same level. */
1881 w
= XWINDOW (window
);
1883 /* Get the dimension of the window sub-matrix for W, depending
1884 on whether this is a combination or a leaf window. */
1885 if (!NILP (w
->hchild
))
1886 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1888 window_change_flags
);
1889 else if (!NILP (w
->vchild
))
1890 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1892 window_change_flags
);
1895 /* If not already done, allocate sub-matrix structures. */
1896 if (w
->desired_matrix
== NULL
)
1898 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1899 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1900 *window_change_flags
|= NEW_LEAF_MATRIX
;
1903 /* Width and height MUST be chosen so that there are no
1904 holes in the frame matrix. */
1905 dim
.width
= required_matrix_width (w
);
1906 dim
.height
= required_matrix_height (w
);
1908 /* Will matrix be re-allocated? */
1909 if (x
!= w
->desired_matrix
->matrix_x
1910 || y
!= w
->desired_matrix
->matrix_y
1911 || dim
.width
!= w
->desired_matrix
->matrix_w
1912 || dim
.height
!= w
->desired_matrix
->matrix_h
1913 || (margin_glyphs_to_reserve (w
, dim
.width
,
1914 w
->left_margin_cols
)
1915 != w
->desired_matrix
->left_margin_glyphs
)
1916 || (margin_glyphs_to_reserve (w
, dim
.width
,
1917 w
->right_margin_cols
)
1918 != w
->desired_matrix
->right_margin_glyphs
))
1919 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1921 /* Actually change matrices, if allowed. Do not consider
1922 CHANGED_LEAF_MATRIX computed above here because the pool
1923 may have been changed which we don't now here. We trust
1924 that we only will be called with DIM_ONLY_P != 0 when
1928 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1929 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1933 /* If we are part of a horizontal combination, advance x for
1934 windows to the right of W; otherwise advance y for windows
1936 if (in_horz_combination_p
)
1941 /* Remember maximum glyph matrix dimensions. */
1942 wmax
= max (wmax
, dim
.width
);
1943 hmax
= max (hmax
, dim
.height
);
1945 /* Next window on same level. */
1948 while (!NILP (window
));
1950 /* Set `total' to the total glyph matrix dimension of this window
1951 level. In a vertical combination, the width is the width of the
1952 widest window; the height is the y we finally reached, corrected
1953 by the y we started with. In a horizontal combination, the total
1954 height is the height of the tallest window, and the width is the
1955 x we finally reached, corrected by the x we started with. */
1956 if (in_horz_combination_p
)
1958 total
.width
= x
- x0
;
1959 total
.height
= hmax
;
1964 total
.height
= y
- y0
;
1971 /* Return the required height of glyph matrices for window W. */
1974 required_matrix_height (w
)
1977 #ifdef HAVE_WINDOW_SYSTEM
1978 struct frame
*f
= XFRAME (w
->frame
);
1980 if (FRAME_WINDOW_P (f
))
1982 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1983 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1984 return (((window_pixel_height
+ ch_height
- 1)
1985 / ch_height
) * w
->nrows_scale_factor
1986 /* One partially visible line at the top and
1987 bottom of the window. */
1989 /* 2 for header and mode line. */
1992 #endif /* HAVE_WINDOW_SYSTEM */
1994 return WINDOW_TOTAL_LINES (w
);
1998 /* Return the required width of glyph matrices for window W. */
2001 required_matrix_width (w
)
2004 #ifdef HAVE_WINDOW_SYSTEM
2005 struct frame
*f
= XFRAME (w
->frame
);
2006 if (FRAME_WINDOW_P (f
))
2008 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2009 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2011 /* Compute number of glyphs needed in a glyph row. */
2012 return (((window_pixel_width
+ ch_width
- 1)
2013 / ch_width
) * w
->ncols_scale_factor
2014 /* 2 partially visible columns in the text area. */
2016 /* One partially visible column at the right
2017 edge of each marginal area. */
2020 #endif /* HAVE_WINDOW_SYSTEM */
2022 return XINT (w
->total_cols
);
2026 /* Allocate window matrices for window-based redisplay. W is the
2027 window whose matrices must be allocated/reallocated. CH_DIM is the
2028 size of the smallest character that could potentially be used on W. */
2031 allocate_matrices_for_window_redisplay (w
)
2036 if (!NILP (w
->vchild
))
2037 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2038 else if (!NILP (w
->hchild
))
2039 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2042 /* W is a leaf window. */
2045 /* If matrices are not yet allocated, allocate them now. */
2046 if (w
->desired_matrix
== NULL
)
2048 w
->desired_matrix
= new_glyph_matrix (NULL
);
2049 w
->current_matrix
= new_glyph_matrix (NULL
);
2052 dim
.width
= required_matrix_width (w
);
2053 dim
.height
= required_matrix_height (w
);
2054 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2055 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2058 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2063 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2064 do it for all frames; otherwise do it just for the given frame.
2065 This function must be called when a new frame is created, its size
2066 changes, or its window configuration changes. */
2072 /* Block input so that expose events and other events that access
2073 glyph matrices are not processed while we are changing them. */
2077 adjust_frame_glyphs (f
);
2080 Lisp_Object tail
, lisp_frame
;
2082 FOR_EACH_FRAME (tail
, lisp_frame
)
2083 adjust_frame_glyphs (XFRAME (lisp_frame
));
2090 /* Adjust frame glyphs when Emacs is initialized.
2092 To be called from init_display.
2094 We need a glyph matrix because redraw will happen soon.
2095 Unfortunately, window sizes on selected_frame are not yet set to
2096 meaningful values. I believe we can assume that there are only two
2097 windows on the frame---the mini-buffer and the root window. Frame
2098 height and width seem to be correct so far. So, set the sizes of
2099 windows to estimated values. */
2102 adjust_frame_glyphs_initially ()
2104 struct frame
*sf
= SELECTED_FRAME ();
2105 struct window
*root
= XWINDOW (sf
->root_window
);
2106 struct window
*mini
= XWINDOW (root
->next
);
2107 int frame_lines
= FRAME_LINES (sf
);
2108 int frame_cols
= FRAME_COLS (sf
);
2109 int top_margin
= FRAME_TOP_MARGIN (sf
);
2111 /* Do it for the root window. */
2112 XSETFASTINT (root
->top_line
, top_margin
);
2113 XSETFASTINT (root
->total_cols
, frame_cols
);
2114 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2116 /* Do it for the mini-buffer window. */
2117 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2118 XSETFASTINT (mini
->total_cols
, frame_cols
);
2119 set_window_height (root
->next
, 1, 0);
2121 adjust_frame_glyphs (sf
);
2122 glyphs_initialized_initially_p
= 1;
2126 /* Allocate/reallocate glyph matrices of a single frame F. */
2129 adjust_frame_glyphs (f
)
2132 if (FRAME_WINDOW_P (f
))
2133 adjust_frame_glyphs_for_window_redisplay (f
);
2135 adjust_frame_glyphs_for_frame_redisplay (f
);
2137 /* Don't forget the message buffer and the buffer for
2138 decode_mode_spec. */
2139 adjust_frame_message_buffer (f
);
2140 adjust_decode_mode_spec_buffer (f
);
2142 f
->glyphs_initialized_p
= 1;
2146 /* In the window tree with root W, build current matrices of leaf
2147 windows from the frame's current matrix. */
2150 fake_current_matrices (window
)
2155 for (; !NILP (window
); window
= w
->next
)
2157 w
= XWINDOW (window
);
2159 if (!NILP (w
->hchild
))
2160 fake_current_matrices (w
->hchild
);
2161 else if (!NILP (w
->vchild
))
2162 fake_current_matrices (w
->vchild
);
2166 struct frame
*f
= XFRAME (w
->frame
);
2167 struct glyph_matrix
*m
= w
->current_matrix
;
2168 struct glyph_matrix
*fm
= f
->current_matrix
;
2170 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2171 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2173 for (i
= 0; i
< m
->matrix_h
; ++i
)
2175 struct glyph_row
*r
= m
->rows
+ i
;
2176 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2178 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2179 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2181 r
->enabled_p
= fr
->enabled_p
;
2184 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2185 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2186 r
->used
[TEXT_AREA
] = (m
->matrix_w
2187 - r
->used
[LEFT_MARGIN_AREA
]
2188 - r
->used
[RIGHT_MARGIN_AREA
]);
2197 /* Save away the contents of frame F's current frame matrix. Value is
2198 a glyph matrix holding the contents of F's current frame matrix. */
2200 static struct glyph_matrix
*
2201 save_current_matrix (f
)
2205 struct glyph_matrix
*saved
;
2207 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2208 bzero (saved
, sizeof *saved
);
2209 saved
->nrows
= f
->current_matrix
->nrows
;
2210 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2211 * sizeof *saved
->rows
);
2212 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2214 for (i
= 0; i
< saved
->nrows
; ++i
)
2216 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2217 struct glyph_row
*to
= saved
->rows
+ i
;
2218 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2219 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2220 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2221 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2228 /* Restore the contents of frame F's current frame matrix from SAVED,
2229 and free memory associated with SAVED. */
2232 restore_current_matrix (f
, saved
)
2234 struct glyph_matrix
*saved
;
2238 for (i
= 0; i
< saved
->nrows
; ++i
)
2240 struct glyph_row
*from
= saved
->rows
+ i
;
2241 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2242 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2243 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2244 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2245 xfree (from
->glyphs
[TEXT_AREA
]);
2248 xfree (saved
->rows
);
2254 /* Allocate/reallocate glyph matrices of a single frame F for
2255 frame-based redisplay. */
2258 adjust_frame_glyphs_for_frame_redisplay (f
)
2261 struct dim matrix_dim
;
2263 int window_change_flags
;
2266 if (!FRAME_LIVE_P (f
))
2269 top_window_y
= FRAME_TOP_MARGIN (f
);
2271 /* Allocate glyph pool structures if not already done. */
2272 if (f
->desired_pool
== NULL
)
2274 f
->desired_pool
= new_glyph_pool ();
2275 f
->current_pool
= new_glyph_pool ();
2278 /* Allocate frames matrix structures if needed. */
2279 if (f
->desired_matrix
== NULL
)
2281 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2282 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2285 /* Compute window glyph matrices. (This takes the mini-buffer
2286 window into account). The result is the size of the frame glyph
2287 matrix needed. The variable window_change_flags is set to a bit
2288 mask indicating whether new matrices will be allocated or
2289 existing matrices change their size or location within the frame
2291 window_change_flags
= 0;
2293 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2296 &window_change_flags
);
2298 /* Add in menu bar lines, if any. */
2299 matrix_dim
.height
+= top_window_y
;
2301 /* Enlarge pools as necessary. */
2302 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2303 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2305 /* Set up glyph pointers within window matrices. Do this only if
2306 absolutely necessary since it requires a frame redraw. */
2307 if (pool_changed_p
|| window_change_flags
)
2309 /* Do it for window matrices. */
2310 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2312 &window_change_flags
);
2314 /* Size of frame matrices must equal size of frame. Note
2315 that we are called for X frames with window widths NOT equal
2316 to the frame width (from CHANGE_FRAME_SIZE_1). */
2317 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2318 && matrix_dim
.height
== FRAME_LINES (f
));
2320 /* Pointers to glyph memory in glyph rows are exchanged during
2321 the update phase of redisplay, which means in general that a
2322 frame's current matrix consists of pointers into both the
2323 desired and current glyph pool of the frame. Adjusting a
2324 matrix sets the frame matrix up so that pointers are all into
2325 the same pool. If we want to preserve glyph contents of the
2326 current matrix over a call to adjust_glyph_matrix, we must
2327 make a copy of the current glyphs, and restore the current
2328 matrix' contents from that copy. */
2329 if (display_completed
2330 && !FRAME_GARBAGED_P (f
)
2331 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2332 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2334 struct glyph_matrix
*copy
= save_current_matrix (f
);
2335 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2336 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2337 restore_current_matrix (f
, copy
);
2338 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2342 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2343 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2344 SET_FRAME_GARBAGED (f
);
2350 /* Allocate/reallocate glyph matrices of a single frame F for
2351 window-based redisplay. */
2354 adjust_frame_glyphs_for_window_redisplay (f
)
2359 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2361 /* Allocate/reallocate window matrices. */
2362 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2364 /* Allocate/ reallocate matrices of the dummy window used to display
2365 the menu bar under X when no X toolkit support is available. */
2366 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2368 /* Allocate a dummy window if not already done. */
2369 if (NILP (f
->menu_bar_window
))
2371 f
->menu_bar_window
= make_window ();
2372 w
= XWINDOW (f
->menu_bar_window
);
2373 XSETFRAME (w
->frame
, f
);
2374 w
->pseudo_window_p
= 1;
2377 w
= XWINDOW (f
->menu_bar_window
);
2379 /* Set window dimensions to frame dimensions and allocate or
2380 adjust glyph matrices of W. */
2381 XSETFASTINT (w
->top_line
, 0);
2382 XSETFASTINT (w
->left_col
, 0);
2383 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2384 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2385 allocate_matrices_for_window_redisplay (w
);
2387 #endif /* not USE_X_TOOLKIT */
2390 /* Allocate/ reallocate matrices of the tool bar window. If we
2391 don't have a tool bar window yet, make one. */
2392 if (NILP (f
->tool_bar_window
))
2394 f
->tool_bar_window
= make_window ();
2395 w
= XWINDOW (f
->tool_bar_window
);
2396 XSETFRAME (w
->frame
, f
);
2397 w
->pseudo_window_p
= 1;
2400 w
= XWINDOW (f
->tool_bar_window
);
2402 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2403 XSETFASTINT (w
->left_col
, 0);
2404 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2405 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2406 allocate_matrices_for_window_redisplay (w
);
2411 /* Adjust/ allocate message buffer of frame F.
2413 Note that the message buffer is never freed. Since I could not
2414 find a free in 19.34, I assume that freeing it would be
2415 problematic in some way and don't do it either.
2417 (Implementation note: It should be checked if we can free it
2418 eventually without causing trouble). */
2421 adjust_frame_message_buffer (f
)
2424 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2426 if (FRAME_MESSAGE_BUF (f
))
2428 char *buffer
= FRAME_MESSAGE_BUF (f
);
2429 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2430 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2433 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2437 /* Re-allocate buffer for decode_mode_spec on frame F. */
2440 adjust_decode_mode_spec_buffer (f
)
2443 f
->decode_mode_spec_buffer
2444 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2445 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2450 /**********************************************************************
2451 Freeing Glyph Matrices
2452 **********************************************************************/
2454 /* Free glyph memory for a frame F. F may be null. This function can
2455 be called for the same frame more than once. The root window of
2456 F may be nil when this function is called. This is the case when
2457 the function is called when F is destroyed. */
2463 if (f
&& f
->glyphs_initialized_p
)
2465 /* Block interrupt input so that we don't get surprised by an X
2466 event while we're in an inconsistent state. */
2468 f
->glyphs_initialized_p
= 0;
2470 /* Release window sub-matrices. */
2471 if (!NILP (f
->root_window
))
2472 free_window_matrices (XWINDOW (f
->root_window
));
2474 /* Free the dummy window for menu bars without X toolkit and its
2476 if (!NILP (f
->menu_bar_window
))
2478 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2479 free_glyph_matrix (w
->desired_matrix
);
2480 free_glyph_matrix (w
->current_matrix
);
2481 w
->desired_matrix
= w
->current_matrix
= NULL
;
2482 f
->menu_bar_window
= Qnil
;
2485 /* Free the tool bar window and its glyph matrices. */
2486 if (!NILP (f
->tool_bar_window
))
2488 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2489 free_glyph_matrix (w
->desired_matrix
);
2490 free_glyph_matrix (w
->current_matrix
);
2491 w
->desired_matrix
= w
->current_matrix
= NULL
;
2492 f
->tool_bar_window
= Qnil
;
2495 /* Release frame glyph matrices. Reset fields to zero in
2496 case we are called a second time. */
2497 if (f
->desired_matrix
)
2499 free_glyph_matrix (f
->desired_matrix
);
2500 free_glyph_matrix (f
->current_matrix
);
2501 f
->desired_matrix
= f
->current_matrix
= NULL
;
2504 /* Release glyph pools. */
2505 if (f
->desired_pool
)
2507 free_glyph_pool (f
->desired_pool
);
2508 free_glyph_pool (f
->current_pool
);
2509 f
->desired_pool
= f
->current_pool
= NULL
;
2517 /* Free glyph sub-matrices in the window tree rooted at W. This
2518 function may be called with a null pointer, and it may be called on
2519 the same tree more than once. */
2522 free_window_matrices (w
)
2527 if (!NILP (w
->hchild
))
2528 free_window_matrices (XWINDOW (w
->hchild
));
2529 else if (!NILP (w
->vchild
))
2530 free_window_matrices (XWINDOW (w
->vchild
));
2533 /* This is a leaf window. Free its memory and reset fields
2534 to zero in case this function is called a second time for
2536 free_glyph_matrix (w
->current_matrix
);
2537 free_glyph_matrix (w
->desired_matrix
);
2538 w
->current_matrix
= w
->desired_matrix
= NULL
;
2541 /* Next window on same level. */
2542 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2547 /* Check glyph memory leaks. This function is called from
2548 shut_down_emacs. Note that frames are not destroyed when Emacs
2549 exits. We therefore free all glyph memory for all active frames
2550 explicitly and check that nothing is left allocated. */
2553 check_glyph_memory ()
2555 Lisp_Object tail
, frame
;
2557 /* Free glyph memory for all frames. */
2558 FOR_EACH_FRAME (tail
, frame
)
2559 free_glyphs (XFRAME (frame
));
2561 /* Check that nothing is left allocated. */
2562 if (glyph_matrix_count
)
2564 if (glyph_pool_count
)
2570 /**********************************************************************
2571 Building a Frame Matrix
2572 **********************************************************************/
2574 /* Most of the redisplay code works on glyph matrices attached to
2575 windows. This is a good solution most of the time, but it is not
2576 suitable for terminal code. Terminal output functions cannot rely
2577 on being able to set an arbitrary terminal window. Instead they
2578 must be provided with a view of the whole frame, i.e. the whole
2579 screen. We build such a view by constructing a frame matrix from
2580 window matrices in this section.
2582 Windows that must be updated have their must_be_update_p flag set.
2583 For all such windows, their desired matrix is made part of the
2584 desired frame matrix. For other windows, their current matrix is
2585 made part of the desired frame matrix.
2587 +-----------------+----------------+
2588 | desired | desired |
2590 +-----------------+----------------+
2593 +----------------------------------+
2595 Desired window matrices can be made part of the frame matrix in a
2596 cheap way: We exploit the fact that the desired frame matrix and
2597 desired window matrices share their glyph memory. This is not
2598 possible for current window matrices. Their glyphs are copied to
2599 the desired frame matrix. The latter is equivalent to
2600 preserve_other_columns in the old redisplay.
2602 Used glyphs counters for frame matrix rows are the result of adding
2603 up glyph lengths of the window matrices. A line in the frame
2604 matrix is enabled, if a corresponding line in a window matrix is
2607 After building the desired frame matrix, it will be passed to
2608 terminal code, which will manipulate both the desired and current
2609 frame matrix. Changes applied to the frame's current matrix have
2610 to be visible in current window matrices afterwards, of course.
2612 This problem is solved like this:
2614 1. Window and frame matrices share glyphs. Window matrices are
2615 constructed in a way that their glyph contents ARE the glyph
2616 contents needed in a frame matrix. Thus, any modification of
2617 glyphs done in terminal code will be reflected in window matrices
2620 2. Exchanges of rows in a frame matrix done by terminal code are
2621 intercepted by hook functions so that corresponding row operations
2622 on window matrices can be performed. This is necessary because we
2623 use pointers to glyphs in glyph row structures. To satisfy the
2624 assumption of point 1 above that glyphs are updated implicitly in
2625 window matrices when they are manipulated via the frame matrix,
2626 window and frame matrix must of course agree where to find the
2627 glyphs for their rows. Possible manipulations that must be
2628 mirrored are assignments of rows of the desired frame matrix to the
2629 current frame matrix and scrolling the current frame matrix. */
2631 /* Build frame F's desired matrix from window matrices. Only windows
2632 which have the flag must_be_updated_p set have to be updated. Menu
2633 bar lines of a frame are not covered by window matrices, so make
2634 sure not to touch them in this function. */
2637 build_frame_matrix (f
)
2642 /* F must have a frame matrix when this function is called. */
2643 xassert (!FRAME_WINDOW_P (f
));
2645 /* Clear all rows in the frame matrix covered by window matrices.
2646 Menu bar lines are not covered by windows. */
2647 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2648 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2650 /* Build the matrix by walking the window tree. */
2651 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2652 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2656 /* Walk a window tree, building a frame matrix MATRIX from window
2657 matrices. W is the root of a window tree. */
2660 build_frame_matrix_from_window_tree (matrix
, w
)
2661 struct glyph_matrix
*matrix
;
2666 if (!NILP (w
->hchild
))
2667 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2668 else if (!NILP (w
->vchild
))
2669 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2671 build_frame_matrix_from_leaf_window (matrix
, w
);
2673 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2678 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2679 desired frame matrix built. W is a leaf window whose desired or
2680 current matrix is to be added to FRAME_MATRIX. W's flag
2681 must_be_updated_p determines which matrix it contributes to
2682 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2683 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2684 Adding a desired matrix means setting up used counters and such in
2685 frame rows, while adding a current window matrix to FRAME_MATRIX
2686 means copying glyphs. The latter case corresponds to
2687 preserve_other_columns in the old redisplay. */
2690 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2691 struct glyph_matrix
*frame_matrix
;
2694 struct glyph_matrix
*window_matrix
;
2695 int window_y
, frame_y
;
2696 /* If non-zero, a glyph to insert at the right border of W. */
2697 GLYPH right_border_glyph
= 0;
2699 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2700 if (w
->must_be_updated_p
)
2702 window_matrix
= w
->desired_matrix
;
2704 /* Decide whether we want to add a vertical border glyph. */
2705 if (!WINDOW_RIGHTMOST_P (w
))
2707 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2708 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2709 ? XINT (DISP_BORDER_GLYPH (dp
))
2714 window_matrix
= w
->current_matrix
;
2716 /* For all rows in the window matrix and corresponding rows in the
2719 frame_y
= window_matrix
->matrix_y
;
2720 while (window_y
< window_matrix
->nrows
)
2722 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2723 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2724 int current_row_p
= window_matrix
== w
->current_matrix
;
2726 /* Fill up the frame row with spaces up to the left margin of the
2728 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2730 /* Fill up areas in the window matrix row with spaces. */
2731 fill_up_glyph_row_with_spaces (window_row
);
2733 /* If only part of W's desired matrix has been built, and
2734 window_row wasn't displayed, use the corresponding current
2736 if (window_matrix
== w
->desired_matrix
2737 && !window_row
->enabled_p
)
2739 window_row
= w
->current_matrix
->rows
+ window_y
;
2745 /* Copy window row to frame row. */
2746 bcopy (window_row
->glyphs
[0],
2747 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2748 window_matrix
->matrix_w
* sizeof (struct glyph
));
2752 xassert (window_row
->enabled_p
);
2754 /* Only when a desired row has been displayed, we want
2755 the corresponding frame row to be updated. */
2756 frame_row
->enabled_p
= 1;
2758 /* Maybe insert a vertical border between horizontally adjacent
2760 if (right_border_glyph
)
2762 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2763 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2767 /* Window row window_y must be a slice of frame row
2769 xassert (glyph_row_slice_p (window_row
, frame_row
));
2771 /* If rows are in sync, we don't have to copy glyphs because
2772 frame and window share glyphs. */
2774 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2775 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2779 /* Set number of used glyphs in the frame matrix. Since we fill
2780 up with spaces, and visit leaf windows from left to right it
2781 can be done simply. */
2782 frame_row
->used
[TEXT_AREA
]
2783 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2792 /* Add spaces to a glyph row ROW in a window matrix.
2794 Each row has the form:
2796 +---------+-----------------------------+------------+
2797 | left | text | right |
2798 +---------+-----------------------------+------------+
2800 Left and right marginal areas are optional. This function adds
2801 spaces to areas so that there are no empty holes between areas.
2802 In other words: If the right area is not empty, the text area
2803 is filled up with spaces up to the right area. If the text area
2804 is not empty, the left area is filled up.
2806 To be called for frame-based redisplay, only. */
2809 fill_up_glyph_row_with_spaces (row
)
2810 struct glyph_row
*row
;
2812 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2813 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2814 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2818 /* Fill area AREA of glyph row ROW with spaces. To be called for
2819 frame-based redisplay only. */
2822 fill_up_glyph_row_area_with_spaces (row
, area
)
2823 struct glyph_row
*row
;
2826 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2828 struct glyph
*end
= row
->glyphs
[area
+ 1];
2829 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2832 *text
++ = space_glyph
;
2833 row
->used
[area
] = text
- row
->glyphs
[area
];
2838 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2839 reached. In frame matrices only one area, TEXT_AREA, is used. */
2842 fill_up_frame_row_with_spaces (row
, upto
)
2843 struct glyph_row
*row
;
2846 int i
= row
->used
[TEXT_AREA
];
2847 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2850 glyph
[i
++] = space_glyph
;
2852 row
->used
[TEXT_AREA
] = i
;
2857 /**********************************************************************
2858 Mirroring operations on frame matrices in window matrices
2859 **********************************************************************/
2861 /* Set frame being updated via frame-based redisplay to F. This
2862 function must be called before updates to make explicit that we are
2863 working on frame matrices or not. */
2866 set_frame_matrix_frame (f
)
2869 frame_matrix_frame
= f
;
2873 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2874 DESIRED_MATRIX is the desired matrix corresponding to
2875 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2876 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2877 frame_matrix_frame is non-null, this indicates that the exchange is
2878 done in frame matrices, and that we have to perform analogous
2879 operations in window matrices of frame_matrix_frame. */
2882 make_current (desired_matrix
, current_matrix
, row
)
2883 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2886 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2887 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2888 int mouse_face_p
= current_row
->mouse_face_p
;
2890 /* Do current_row = desired_row. This exchanges glyph pointers
2891 between both rows, and does a structure assignment otherwise. */
2892 assign_row (current_row
, desired_row
);
2894 /* Enable current_row to mark it as valid. */
2895 current_row
->enabled_p
= 1;
2896 current_row
->mouse_face_p
= mouse_face_p
;
2898 /* If we are called on frame matrices, perform analogous operations
2899 for window matrices. */
2900 if (frame_matrix_frame
)
2901 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2905 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2906 W's frame which has been made current (by swapping pointers between
2907 current and desired matrix). Perform analogous operations in the
2908 matrices of leaf windows in the window tree rooted at W. */
2911 mirror_make_current (w
, frame_row
)
2917 if (!NILP (w
->hchild
))
2918 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2919 else if (!NILP (w
->vchild
))
2920 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2923 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2924 here because the checks performed in debug mode there
2925 will not allow the conversion. */
2926 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2928 /* If FRAME_ROW is within W, assign the desired row to the
2929 current row (exchanging glyph pointers). */
2930 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2932 struct glyph_row
*current_row
2933 = MATRIX_ROW (w
->current_matrix
, row
);
2934 struct glyph_row
*desired_row
2935 = MATRIX_ROW (w
->desired_matrix
, row
);
2937 if (desired_row
->enabled_p
)
2938 assign_row (current_row
, desired_row
);
2940 swap_glyph_pointers (desired_row
, current_row
);
2941 current_row
->enabled_p
= 1;
2945 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2950 /* Perform row dance after scrolling. We are working on the range of
2951 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2952 including) in MATRIX. COPY_FROM is a vector containing, for each
2953 row I in the range 0 <= I < NLINES, the index of the original line
2954 to move to I. This index is relative to the row range, i.e. 0 <=
2955 index < NLINES. RETAINED_P is a vector containing zero for each
2956 row 0 <= I < NLINES which is empty.
2958 This function is called from do_scrolling and do_direct_scrolling. */
2961 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2963 struct glyph_matrix
*matrix
;
2964 int unchanged_at_top
, nlines
;
2968 /* A copy of original rows. */
2969 struct glyph_row
*old_rows
;
2971 /* Rows to assign to. */
2972 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2976 /* Make a copy of the original rows. */
2977 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2978 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2980 /* Assign new rows, maybe clear lines. */
2981 for (i
= 0; i
< nlines
; ++i
)
2983 int enabled_before_p
= new_rows
[i
].enabled_p
;
2985 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2986 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2987 new_rows
[i
] = old_rows
[copy_from
[i
]];
2988 new_rows
[i
].enabled_p
= enabled_before_p
;
2990 /* RETAINED_P is zero for empty lines. */
2991 if (!retained_p
[copy_from
[i
]])
2992 new_rows
[i
].enabled_p
= 0;
2995 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2996 if (frame_matrix_frame
)
2997 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2998 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3002 /* Synchronize glyph pointers in the current matrix of window W with
3003 the current frame matrix. */
3006 sync_window_with_frame_matrix_rows (w
)
3009 struct frame
*f
= XFRAME (w
->frame
);
3010 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3011 int left
, right
, x
, width
;
3013 /* Preconditions: W must be a leaf window on a tty frame. */
3014 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3015 xassert (!FRAME_WINDOW_P (f
));
3017 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3018 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3019 x
= w
->current_matrix
->matrix_x
;
3020 width
= w
->current_matrix
->matrix_w
;
3022 window_row
= w
->current_matrix
->rows
;
3023 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3024 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3026 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3028 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3029 = frame_row
->glyphs
[0] + x
;
3030 window_row
->glyphs
[TEXT_AREA
]
3031 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3032 window_row
->glyphs
[LAST_AREA
]
3033 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3034 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3035 = window_row
->glyphs
[LAST_AREA
] - right
;
3040 /* Return the window in the window tree rooted in W containing frame
3041 row ROW. Value is null if none is found. */
3044 frame_row_to_window (w
, row
)
3048 struct window
*found
= NULL
;
3052 if (!NILP (w
->hchild
))
3053 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3054 else if (!NILP (w
->vchild
))
3055 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3056 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3057 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3060 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3067 /* Perform a line dance in the window tree rooted at W, after
3068 scrolling a frame matrix in mirrored_line_dance.
3070 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3071 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3072 COPY_FROM is a vector containing, for each row I in the range 0 <=
3073 I < NLINES, the index of the original line to move to I. This
3074 index is relative to the row range, i.e. 0 <= index < NLINES.
3075 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3079 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3081 int unchanged_at_top
, nlines
;
3087 if (!NILP (w
->hchild
))
3088 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3089 nlines
, copy_from
, retained_p
);
3090 else if (!NILP (w
->vchild
))
3091 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3092 nlines
, copy_from
, retained_p
);
3095 /* W is a leaf window, and we are working on its current
3097 struct glyph_matrix
*m
= w
->current_matrix
;
3099 struct glyph_row
*old_rows
;
3101 /* Make a copy of the original rows of matrix m. */
3102 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3103 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3105 for (i
= 0; i
< nlines
; ++i
)
3107 /* Frame relative line assigned to. */
3108 int frame_to
= i
+ unchanged_at_top
;
3110 /* Frame relative line assigned. */
3111 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3113 /* Window relative line assigned to. */
3114 int window_to
= frame_to
- m
->matrix_y
;
3116 /* Window relative line assigned. */
3117 int window_from
= frame_from
- m
->matrix_y
;
3119 /* Is assigned line inside window? */
3120 int from_inside_window_p
3121 = window_from
>= 0 && window_from
< m
->matrix_h
;
3123 /* Is assigned to line inside window? */
3124 int to_inside_window_p
3125 = window_to
>= 0 && window_to
< m
->matrix_h
;
3127 if (from_inside_window_p
&& to_inside_window_p
)
3129 /* Enabled setting before assignment. */
3130 int enabled_before_p
;
3132 /* Do the assignment. The enabled_p flag is saved
3133 over the assignment because the old redisplay did
3135 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3136 m
->rows
[window_to
] = old_rows
[window_from
];
3137 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3139 /* If frame line is empty, window line is empty, too. */
3140 if (!retained_p
[copy_from
[i
]])
3141 m
->rows
[window_to
].enabled_p
= 0;
3143 else if (to_inside_window_p
)
3145 /* A copy between windows. This is an infrequent
3146 case not worth optimizing. */
3147 struct frame
*f
= XFRAME (w
->frame
);
3148 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3150 struct glyph_matrix
*m2
;
3153 w2
= frame_row_to_window (root
, frame_from
);
3154 m2
= w2
->current_matrix
;
3155 m2_from
= frame_from
- m2
->matrix_y
;
3156 copy_row_except_pointers (m
->rows
+ window_to
,
3157 m2
->rows
+ m2_from
);
3159 /* If frame line is empty, window line is empty, too. */
3160 if (!retained_p
[copy_from
[i
]])
3161 m
->rows
[window_to
].enabled_p
= 0;
3164 else if (from_inside_window_p
)
3168 /* If there was a copy between windows, make sure glyph
3169 pointers are in sync with the frame matrix. */
3171 sync_window_with_frame_matrix_rows (w
);
3173 /* Check that no pointers are lost. */
3177 /* Next window on same level. */
3178 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3185 /* Check that window and frame matrices agree about their
3186 understanding where glyphs of the rows are to find. For each
3187 window in the window tree rooted at W, check that rows in the
3188 matrices of leaf window agree with their frame matrices about
3192 check_window_matrix_pointers (w
)
3197 if (!NILP (w
->hchild
))
3198 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3199 else if (!NILP (w
->vchild
))
3200 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3203 struct frame
*f
= XFRAME (w
->frame
);
3204 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3205 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3208 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3213 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3214 a window and FRAME_MATRIX is the corresponding frame matrix. For
3215 each row in WINDOW_MATRIX check that it's a slice of the
3216 corresponding frame row. If it isn't, abort. */
3219 check_matrix_pointers (window_matrix
, frame_matrix
)
3220 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3222 /* Row number in WINDOW_MATRIX. */
3225 /* Row number corresponding to I in FRAME_MATRIX. */
3226 int j
= window_matrix
->matrix_y
;
3228 /* For all rows check that the row in the window matrix is a
3229 slice of the row in the frame matrix. If it isn't we didn't
3230 mirror an operation on the frame matrix correctly. */
3231 while (i
< window_matrix
->nrows
)
3233 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3234 frame_matrix
->rows
+ j
))
3240 #endif /* GLYPH_DEBUG != 0 */
3244 /**********************************************************************
3245 VPOS and HPOS translations
3246 **********************************************************************/
3250 /* Translate vertical position VPOS which is relative to window W to a
3251 vertical position relative to W's frame. */
3254 window_to_frame_vpos (w
, vpos
)
3258 struct frame
*f
= XFRAME (w
->frame
);
3260 xassert (!FRAME_WINDOW_P (f
));
3261 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3262 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3263 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3268 /* Translate horizontal position HPOS which is relative to window W to
3269 a horizontal position relative to W's frame. */
3272 window_to_frame_hpos (w
, hpos
)
3276 struct frame
*f
= XFRAME (w
->frame
);
3278 xassert (!FRAME_WINDOW_P (f
));
3279 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3283 #endif /* GLYPH_DEBUG */
3287 /**********************************************************************
3289 **********************************************************************/
3291 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3292 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3298 CHECK_LIVE_FRAME (frame
);
3301 /* Ignore redraw requests, if frame has no glyphs yet.
3302 (Implementation note: It still has to be checked why we are
3303 called so early here). */
3304 if (!glyphs_initialized_initially_p
)
3308 if (FRAME_MSDOS_P (f
))
3309 set_terminal_modes ();
3311 clear_current_matrices (f
);
3314 windows_or_buffers_changed
++;
3315 /* Mark all windows as inaccurate, so that every window will have
3316 its redisplay done. */
3317 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3318 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3324 /* Redraw frame F. This is nothing more than a call to the Lisp
3325 function redraw-frame. */
3332 XSETFRAME (frame
, f
);
3333 Fredraw_frame (frame
);
3337 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3338 doc
: /* Clear and redisplay all visible frames. */)
3341 Lisp_Object tail
, frame
;
3343 FOR_EACH_FRAME (tail
, frame
)
3344 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3345 Fredraw_frame (frame
);
3351 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3352 visible frames marked as garbaged. */
3355 redraw_garbaged_frames ()
3357 Lisp_Object tail
, frame
;
3359 FOR_EACH_FRAME (tail
, frame
)
3360 if (FRAME_VISIBLE_P (XFRAME (frame
))
3361 && FRAME_GARBAGED_P (XFRAME (frame
)))
3362 Fredraw_frame (frame
);
3367 /***********************************************************************
3369 ***********************************************************************/
3371 /* Try to update display and current glyph matrix directly.
3373 This function is called after a character G has been inserted into
3374 current_buffer. It tries to update the current glyph matrix and
3375 perform appropriate screen output to reflect the insertion. If it
3376 succeeds, the global flag redisplay_performed_directly_p will be
3377 set to 1, and thereby prevent the more costly general redisplay
3378 from running (see redisplay_internal).
3380 This function is not called for `hairy' character insertions.
3381 In particular, it is not called when after or before change
3382 functions exist, like they are used by font-lock. See keyboard.c
3383 for details where this function is called. */
3386 direct_output_for_insert (g
)
3389 register struct frame
*f
= SELECTED_FRAME ();
3390 struct window
*w
= XWINDOW (selected_window
);
3392 struct glyph_row
*glyph_row
;
3393 struct glyph
*glyphs
, *glyph
, *end
;
3395 /* Non-null means that redisplay of W is based on window matrices. */
3396 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3397 /* Non-null means we are in overwrite mode. */
3398 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3400 struct text_pos pos
;
3401 int delta
, delta_bytes
;
3403 /* Not done directly. */
3404 redisplay_performed_directly_p
= 0;
3406 /* Quickly give up for some common cases. */
3407 if (cursor_in_echo_area
3408 /* Give up if fonts have changed. */
3410 /* Give up if face attributes have been changed. */
3411 || face_change_count
3412 /* Give up if cursor position not really known. */
3413 || !display_completed
3414 /* Give up if buffer appears in two places. */
3415 || buffer_shared
> 1
3416 /* Give up if currently displaying a message instead of the
3417 minibuffer contents. */
3418 || (EQ (selected_window
, minibuf_window
)
3419 && EQ (minibuf_window
, echo_area_window
))
3420 /* Give up for hscrolled mini-buffer because display of the prompt
3421 is handled specially there (see display_line). */
3422 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3423 /* Give up if overwriting in the middle of a line. */
3426 && FETCH_BYTE (PT
) != '\n')
3427 /* Give up for tabs and line ends. */
3431 /* Give up if unable to display the cursor in the window. */
3432 || w
->cursor
.vpos
< 0
3433 /* Give up if we are showing a message or just cleared the message
3434 because we might need to resize the echo area window. */
3435 || !NILP (echo_area_buffer
[0])
3436 || !NILP (echo_area_buffer
[1])
3437 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3438 /* Can't do it in a continued line because continuation
3439 lines would change. */
3440 (glyph_row
->continued_p
3441 || glyph_row
->exact_window_width_line_p
3442 /* Can't use this method if the line overlaps others or is
3443 overlapped by others because these other lines would
3444 have to be redisplayed. */
3445 || glyph_row
->overlapping_p
3446 || glyph_row
->overlapped_p
))
3447 /* Can't do it for partial width windows on terminal frames
3448 because we can't clear to eol in such a window. */
3449 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3452 /* If we can't insert glyphs, we can use this method only
3453 at the end of a line. */
3454 if (!char_ins_del_ok
)
3455 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3458 /* Set up a display iterator structure for W. Glyphs will be
3459 produced in scratch_glyph_row. Current position is W's cursor
3461 clear_glyph_row (&scratch_glyph_row
);
3462 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3463 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3464 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3467 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3468 if (glyph_row
->mouse_face_p
)
3471 /* Give up if highlighting trailing whitespace and we have trailing
3472 whitespace in glyph_row. We would have to remove the trailing
3473 whitespace face in that case. */
3474 if (!NILP (Vshow_trailing_whitespace
)
3475 && glyph_row
->used
[TEXT_AREA
])
3479 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3480 if (last
->type
== STRETCH_GLYPH
3481 || (last
->type
== CHAR_GLYPH
3482 && last
->u
.ch
== ' '))
3486 /* Give up if there are overlay strings at pos. This would fail
3487 if the overlay string has newlines in it. */
3488 if (STRINGP (it
.string
))
3491 it
.hpos
= w
->cursor
.hpos
;
3492 it
.vpos
= w
->cursor
.vpos
;
3493 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3494 it
.current_y
= w
->cursor
.y
;
3495 it
.end_charpos
= PT
;
3496 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3497 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3499 /* More than one display element may be returned for PT - 1 if
3500 (i) it's a control character which is translated into `\003' or
3501 `^C', or (ii) it has a display table entry, or (iii) it's a
3502 combination of both. */
3503 delta
= delta_bytes
= 0;
3504 while (get_next_display_element (&it
))
3506 PRODUCE_GLYPHS (&it
);
3508 /* Give up if glyph doesn't fit completely on the line. */
3509 if (it
.current_x
>= it
.last_visible_x
)
3512 /* Give up if new glyph has different ascent or descent than
3513 the original row, or if it is not a character glyph. */
3514 if (glyph_row
->ascent
!= it
.ascent
3515 || glyph_row
->height
!= it
.ascent
+ it
.descent
3516 || glyph_row
->phys_ascent
!= it
.phys_ascent
3517 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3518 || it
.what
!= IT_CHARACTER
)
3522 delta_bytes
+= it
.len
;
3523 set_iterator_to_next (&it
, 1);
3526 /* Give up if we hit the right edge of the window. We would have
3527 to insert truncation or continuation glyphs. */
3528 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3529 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3532 /* Give up if there is a \t following in the line. */
3534 it2
.end_charpos
= ZV
;
3535 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3536 while (get_next_display_element (&it2
)
3537 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3541 set_iterator_to_next (&it2
, 1);
3544 /* Number of new glyphs produced. */
3545 n
= it
.glyph_row
->used
[TEXT_AREA
];
3547 /* Start and end of glyphs in original row. */
3548 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3549 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3551 /* Make room for new glyphs, then insert them. */
3552 xassert (end
- glyphs
- n
>= 0);
3553 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3554 (end
- glyphs
- n
) * sizeof (*end
));
3555 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3556 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3557 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3559 /* Compute new line width. */
3560 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3561 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3562 glyph_row
->pixel_width
= glyph_row
->x
;
3565 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3569 /* Increment buffer positions for glyphs following the newly
3571 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3572 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3573 glyph
->charpos
+= delta
;
3575 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3577 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3578 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3581 /* Adjust positions in lines following the one we are in. */
3582 increment_matrix_positions (w
->current_matrix
,
3584 w
->current_matrix
->nrows
,
3585 delta
, delta_bytes
);
3587 glyph_row
->contains_overlapping_glyphs_p
3588 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3590 glyph_row
->displays_text_p
= 1;
3591 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3592 XFASTINT (w
->window_end_vpos
)));
3594 if (!NILP (Vshow_trailing_whitespace
))
3595 highlight_trailing_whitespace (it
.f
, glyph_row
);
3597 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3598 In the middle, we have to insert glyphs. Note that this is now
3599 implemented for X frames. The implementation uses updated_window
3601 updated_row
= glyph_row
;
3602 updated_area
= TEXT_AREA
;
3606 rif
->update_window_begin_hook (w
);
3608 if (glyphs
== end
- n
3609 /* In front of a space added by append_space. */
3610 || (glyphs
== end
- n
- 1
3611 && (end
- n
)->charpos
<= 0))
3612 rif
->write_glyphs (glyphs
, n
);
3614 rif
->insert_glyphs (glyphs
, n
);
3618 if (glyphs
== end
- n
)
3619 write_glyphs (glyphs
, n
);
3621 insert_glyphs (glyphs
, n
);
3624 w
->cursor
.hpos
+= n
;
3625 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3626 xassert (w
->cursor
.hpos
>= 0
3627 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3629 /* How to set the cursor differs depending on whether we are
3630 using a frame matrix or a window matrix. Note that when
3631 a frame matrix is used, cursor_to expects frame coordinates,
3632 and the X and Y parameters are not used. */
3633 if (window_redisplay_p
)
3634 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3635 w
->cursor
.y
, w
->cursor
.x
);
3639 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3640 + (INTEGERP (w
->left_margin_cols
)
3641 ? XFASTINT (w
->left_margin_cols
)
3643 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3647 #ifdef HAVE_WINDOW_SYSTEM
3648 update_window_fringes (w
, 0);
3652 rif
->update_window_end_hook (w
, 1, 0);
3657 TRACE ((stderr
, "direct output for insert\n"));
3658 mark_window_display_accurate (it
.window
, 1);
3659 redisplay_performed_directly_p
= 1;
3664 /* Perform a direct display update for moving PT by N positions
3665 left or right. N < 0 means a movement backwards. This function
3666 is currently only called for N == 1 or N == -1. */
3669 direct_output_forward_char (n
)
3672 struct frame
*f
= SELECTED_FRAME ();
3673 struct window
*w
= XWINDOW (selected_window
);
3674 struct glyph_row
*row
;
3676 /* Give up if point moved out of or into a composition. */
3677 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3678 current_buffer
, PT
))
3681 /* Give up if face attributes have been changed. */
3682 if (face_change_count
)
3685 /* Give up if current matrix is not up to date or we are
3686 displaying a message. */
3687 if (!display_completed
|| cursor_in_echo_area
)
3690 /* Give up if the buffer's direction is reversed. */
3691 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3694 /* Can't use direct output if highlighting a region. */
3695 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3698 /* Can't use direct output if highlighting trailing whitespace. */
3699 if (!NILP (Vshow_trailing_whitespace
))
3702 /* Give up if we are showing a message or just cleared the message
3703 because we might need to resize the echo area window. */
3704 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3707 /* Give up if currently displaying a message instead of the
3708 minibuffer contents. */
3709 if (XWINDOW (minibuf_window
) == w
3710 && EQ (minibuf_window
, echo_area_window
))
3713 /* Give up if we don't know where the cursor is. */
3714 if (w
->cursor
.vpos
< 0)
3717 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3719 /* Give up if PT is outside of the last known cursor row. */
3720 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3721 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3724 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3726 w
->last_cursor
= w
->cursor
;
3727 XSETFASTINT (w
->last_point
, PT
);
3729 xassert (w
->cursor
.hpos
>= 0
3730 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3732 if (FRAME_WINDOW_P (f
))
3733 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3734 w
->cursor
.y
, w
->cursor
.x
);
3738 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3739 + (INTEGERP (w
->left_margin_cols
)
3740 ? XFASTINT (w
->left_margin_cols
)
3742 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3747 redisplay_performed_directly_p
= 1;
3753 /***********************************************************************
3755 ***********************************************************************/
3757 /* Update frame F based on the data in desired matrices.
3759 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3760 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3763 Value is non-zero if redisplay was stopped due to pending input. */
3766 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3769 int inhibit_hairy_id_p
;
3771 /* 1 means display has been paused because of pending input. */
3773 struct window
*root_window
= XWINDOW (f
->root_window
);
3775 if (FRAME_WINDOW_P (f
))
3777 /* We are working on window matrix basis. All windows whose
3778 flag must_be_updated_p is set have to be updated. */
3780 /* Record that we are not working on frame matrices. */
3781 set_frame_matrix_frame (NULL
);
3783 /* Update all windows in the window tree of F, maybe stopping
3784 when pending input is detected. */
3787 /* Update the menu bar on X frames that don't have toolkit
3789 if (WINDOWP (f
->menu_bar_window
))
3790 update_window (XWINDOW (f
->menu_bar_window
), 1);
3792 /* Update the tool-bar window, if present. */
3793 if (WINDOWP (f
->tool_bar_window
))
3795 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3797 /* Update tool-bar window. */
3798 if (w
->must_be_updated_p
)
3802 update_window (w
, 1);
3803 w
->must_be_updated_p
= 0;
3805 /* Swap tool-bar strings. We swap because we want to
3807 tem
= f
->current_tool_bar_string
;
3808 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3809 f
->desired_tool_bar_string
= tem
;
3814 /* Update windows. */
3815 paused_p
= update_window_tree (root_window
, force_p
);
3818 /* This flush is a performance bottleneck under X,
3819 and it doesn't seem to be necessary anyway (in general).
3820 It is necessary when resizing the window with the mouse, or
3821 at least the fringes are not redrawn in a timely manner. ++kfs */
3822 if (f
->force_flush_display_p
)
3824 rif
->flush_display (f
);
3825 f
->force_flush_display_p
= 0;
3830 /* We are working on frame matrix basis. Set the frame on whose
3831 frame matrix we operate. */
3832 set_frame_matrix_frame (f
);
3834 /* Build F's desired matrix from window matrices. */
3835 build_frame_matrix (f
);
3837 /* Update the display */
3839 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3843 fflush (termscript
);
3846 /* Check window matrices for lost pointers. */
3848 check_window_matrix_pointers (root_window
);
3849 add_frame_display_history (f
, paused_p
);
3853 /* Reset flags indicating that a window should be updated. */
3854 set_window_update_flags (root_window
, 0);
3856 display_completed
= !paused_p
;
3862 /************************************************************************
3863 Window-based updates
3864 ************************************************************************/
3866 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3867 don't stop updating when input is pending. */
3870 update_window_tree (w
, force_p
)
3876 while (w
&& !paused_p
)
3878 if (!NILP (w
->hchild
))
3879 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3880 else if (!NILP (w
->vchild
))
3881 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3882 else if (w
->must_be_updated_p
)
3883 paused_p
|= update_window (w
, force_p
);
3885 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3892 /* Update window W if its flag must_be_updated_p is non-zero. If
3893 FORCE_P is non-zero, don't stop updating if input is pending. */
3896 update_single_window (w
, force_p
)
3900 if (w
->must_be_updated_p
)
3902 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3904 /* Record that this is not a frame-based redisplay. */
3905 set_frame_matrix_frame (NULL
);
3909 update_window (w
, force_p
);
3912 /* Reset flag in W. */
3913 w
->must_be_updated_p
= 0;
3918 /* Redraw lines from the current matrix of window W that are
3919 overlapped by other rows. YB is bottom-most y-position in W. */
3922 redraw_overlapped_rows (w
, yb
)
3928 /* If rows overlapping others have been changed, the rows being
3929 overlapped have to be redrawn. This won't draw lines that have
3930 already been drawn in update_window_line because overlapped_p in
3931 desired rows is 0, so after row assignment overlapped_p in
3932 current rows is 0. */
3933 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3935 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3937 if (!row
->enabled_p
)
3939 else if (row
->mode_line_p
)
3942 if (row
->overlapped_p
)
3944 enum glyph_row_area area
;
3946 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3949 updated_area
= area
;
3950 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3951 if (row
->used
[area
])
3952 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3953 rif
->clear_end_of_line (-1);
3956 row
->overlapped_p
= 0;
3959 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3965 /* Redraw lines from the current matrix of window W that overlap
3966 others. YB is bottom-most y-position in W. */
3969 redraw_overlapping_rows (w
, yb
)
3974 struct glyph_row
*row
;
3976 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3978 row
= w
->current_matrix
->rows
+ i
;
3980 if (!row
->enabled_p
)
3982 else if (row
->mode_line_p
)
3985 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3987 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3989 if (row
->used
[LEFT_MARGIN_AREA
])
3990 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3992 if (row
->used
[TEXT_AREA
])
3993 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3995 if (row
->used
[RIGHT_MARGIN_AREA
])
3996 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3998 /* Record in neighbour rows that ROW overwrites part of their
4000 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4001 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4002 if ((row
->phys_height
- row
->phys_ascent
4003 > row
->height
- row
->ascent
)
4005 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4016 /* Check that no row in the current matrix of window W is enabled
4017 which is below what's displayed in the window. */
4020 check_current_matrix_flags (w
)
4023 int last_seen_p
= 0;
4024 int i
, yb
= window_text_bottom_y (w
);
4026 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4028 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4029 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4031 else if (last_seen_p
&& row
->enabled_p
)
4036 #endif /* GLYPH_DEBUG */
4039 /* Update display of window W. FORCE_P non-zero means that we should
4040 not stop when detecting pending input. */
4043 update_window (w
, force_p
)
4047 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4049 int preempt_count
= baud_rate
/ 2400 + 1;
4050 extern int input_pending
;
4051 extern Lisp_Object do_mouse_tracking
;
4053 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4055 /* Check that W's frame doesn't have glyph matrices. */
4056 xassert (FRAME_WINDOW_P (f
));
4057 xassert (updating_frame
!= NULL
);
4060 /* Check pending input the first time so that we can quickly return. */
4061 if (redisplay_dont_pause
)
4064 detect_input_pending_ignore_squeezables ();
4066 /* If forced to complete the update, or if no input is pending, do
4068 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4070 struct glyph_row
*row
, *end
;
4071 struct glyph_row
*mode_line_row
;
4072 struct glyph_row
*header_line_row
;
4073 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4075 rif
->update_window_begin_hook (w
);
4076 yb
= window_text_bottom_y (w
);
4078 /* If window has a header line, update it before everything else.
4079 Adjust y-positions of other rows by the header line height. */
4080 row
= desired_matrix
->rows
;
4081 end
= row
+ desired_matrix
->nrows
- 1;
4083 if (row
->mode_line_p
)
4085 header_line_row
= row
;
4089 header_line_row
= NULL
;
4091 /* Update the mode line, if necessary. */
4092 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4093 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4095 mode_line_row
->y
= yb
;
4096 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4098 &mouse_face_overwritten_p
);
4102 /* Find first enabled row. Optimizations in redisplay_internal
4103 may lead to an update with only one row enabled. There may
4104 be also completely empty matrices. */
4105 while (row
< end
&& !row
->enabled_p
)
4108 /* Try reusing part of the display by copying. */
4109 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4111 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4114 /* All rows were found to be equal. */
4120 /* We've scrolled the display. */
4126 /* Update the rest of the lines. */
4127 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4130 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4133 /* We'll have to play a little bit with when to
4134 detect_input_pending. If it's done too often,
4135 scrolling large windows with repeated scroll-up
4136 commands will too quickly pause redisplay. */
4137 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4138 detect_input_pending_ignore_squeezables ();
4140 changed_p
|= update_window_line (w
, vpos
,
4141 &mouse_face_overwritten_p
);
4143 /* Mark all rows below the last visible one in the current
4144 matrix as invalid. This is necessary because of
4145 variable line heights. Consider the case of three
4146 successive redisplays, where the first displays 5
4147 lines, the second 3 lines, and the third 5 lines again.
4148 If the second redisplay wouldn't mark rows in the
4149 current matrix invalid, the third redisplay might be
4150 tempted to optimize redisplay based on lines displayed
4151 in the first redisplay. */
4152 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4153 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4154 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4157 /* Was display preempted? */
4158 paused_p
= row
< end
;
4162 /* Update the header line after scrolling because a new header
4163 line would otherwise overwrite lines at the top of the window
4164 that can be scrolled. */
4165 if (header_line_row
&& header_line_row
->enabled_p
)
4167 header_line_row
->y
= 0;
4168 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4172 /* Fix the appearance of overlapping/overlapped rows. */
4173 if (!paused_p
&& !w
->pseudo_window_p
)
4175 if (changed_p
&& rif
->fix_overlapping_area
)
4177 redraw_overlapped_rows (w
, yb
);
4178 redraw_overlapping_rows (w
, yb
);
4181 /* Make cursor visible at cursor position of W. */
4182 set_window_cursor_after_update (w
);
4184 #if 0 /* Check that current matrix invariants are satisfied. This is
4185 for debugging only. See the comment of check_matrix_invariants. */
4186 IF_DEBUG (check_matrix_invariants (w
));
4191 /* Remember the redisplay method used to display the matrix. */
4192 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4195 #ifdef HAVE_WINDOW_SYSTEM
4196 update_window_fringes (w
, 0);
4199 /* End the update of window W. Don't set the cursor if we
4200 paused updating the display because in this case,
4201 set_window_cursor_after_update hasn't been called, and
4202 output_cursor doesn't contain the cursor location. */
4203 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4209 /* check_current_matrix_flags (w); */
4210 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4213 clear_glyph_matrix (desired_matrix
);
4219 /* Update the display of area AREA in window W, row number VPOS.
4220 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4223 update_marginal_area (w
, area
, vpos
)
4227 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4229 /* Let functions in xterm.c know what area subsequent X positions
4230 will be relative to. */
4231 updated_area
= area
;
4233 /* Set cursor to start of glyphs, write them, and clear to the end
4234 of the area. I don't think that something more sophisticated is
4235 necessary here, since marginal areas will not be the default. */
4236 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4237 if (desired_row
->used
[area
])
4238 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4239 rif
->clear_end_of_line (-1);
4243 /* Update the display of the text area of row VPOS in window W.
4244 Value is non-zero if display has changed. */
4247 update_text_area (w
, vpos
)
4251 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4252 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4255 /* Let functions in xterm.c know what area subsequent X positions
4256 will be relative to. */
4257 updated_area
= TEXT_AREA
;
4259 /* If rows are at different X or Y, or rows have different height,
4260 or the current row is marked invalid, write the entire line. */
4261 if (!current_row
->enabled_p
4262 || desired_row
->y
!= current_row
->y
4263 || desired_row
->ascent
!= current_row
->ascent
4264 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4265 || desired_row
->phys_height
!= current_row
->phys_height
4266 || desired_row
->visible_height
!= current_row
->visible_height
4267 || current_row
->overlapped_p
4268 || current_row
->mouse_face_p
4269 || current_row
->x
!= desired_row
->x
)
4271 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4273 if (desired_row
->used
[TEXT_AREA
])
4274 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4275 desired_row
->used
[TEXT_AREA
]);
4277 /* Clear to end of window. */
4278 rif
->clear_end_of_line (-1);
4281 /* This erases the cursor. We do this here because
4282 notice_overwritten_cursor cannot easily check this, which
4283 might indicate that the whole functionality of
4284 notice_overwritten_cursor would better be implemented here.
4285 On the other hand, we need notice_overwritten_cursor as long
4286 as mouse highlighting is done asynchronously outside of
4288 if (vpos
== w
->phys_cursor
.vpos
)
4289 w
->phys_cursor_on_p
= 0;
4294 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4295 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4296 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4297 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4299 /* If the desired row extends its face to the text area end,
4300 make sure we write at least one glyph, so that the face
4301 extension actually takes place. */
4302 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4305 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4309 /* Loop over glyphs that current and desired row may have
4315 /* Skip over glyphs that both rows have in common. These
4316 don't have to be written. We can't skip if the last
4317 current glyph overlaps the glyph to its right. For
4318 example, consider a current row of `if ' with the `f' in
4319 Courier bold so that it overlaps the ` ' to its right.
4320 If the desired row is ` ', we would skip over the space
4321 after the `if' and there would remain a pixel from the
4322 `f' on the screen. */
4323 if (overlapping_glyphs_p
&& i
> 0)
4325 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4328 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4330 can_skip_p
= right
== 0;
4336 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4338 x
+= desired_glyph
->pixel_width
;
4339 ++desired_glyph
, ++current_glyph
, ++i
;
4342 /* Consider the case that the current row contains "xxx
4343 ppp ggg" in italic Courier font, and the desired row
4344 is "xxx ggg". The character `p' has lbearing, `g'
4345 has not. The loop above will stop in front of the
4346 first `p' in the current row. If we would start
4347 writing glyphs there, we wouldn't erase the lbearing
4348 of the `p'. The rest of the lbearing problem is then
4349 taken care of by draw_glyphs. */
4350 if (overlapping_glyphs_p
4352 && i
< current_row
->used
[TEXT_AREA
]
4353 && (current_row
->used
[TEXT_AREA
]
4354 != desired_row
->used
[TEXT_AREA
]))
4358 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4360 while (left
> 0 && i
> 0)
4362 --i
, --desired_glyph
, --current_glyph
;
4363 x
-= desired_glyph
->pixel_width
;
4364 left
-= desired_glyph
->pixel_width
;
4369 /* Try to avoid writing the entire rest of the desired row
4370 by looking for a resync point. This mainly prevents
4371 mode line flickering in the case the mode line is in
4372 fixed-pitch font, which it usually will be. */
4373 if (i
< desired_row
->used
[TEXT_AREA
])
4375 int start_x
= x
, start_hpos
= i
;
4376 struct glyph
*start
= desired_glyph
;
4378 int skip_first_p
= !can_skip_p
;
4380 /* Find the next glyph that's equal again. */
4383 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4386 x
+= desired_glyph
->pixel_width
;
4387 current_x
+= current_glyph
->pixel_width
;
4388 ++desired_glyph
, ++current_glyph
, ++i
;
4392 if (i
== start_hpos
|| x
!= current_x
)
4396 desired_glyph
= start
;
4400 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4401 rif
->write_glyphs (start
, i
- start_hpos
);
4406 /* Write the rest. */
4407 if (i
< desired_row
->used
[TEXT_AREA
])
4409 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4410 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4414 /* Maybe clear to end of line. */
4415 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4417 /* If new row extends to the end of the text area, nothing
4418 has to be cleared, if and only if we did a write_glyphs
4419 above. This is made sure by setting desired_stop_pos
4420 appropriately above. */
4421 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4423 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4425 /* If old row extends to the end of the text area, clear. */
4426 if (i
>= desired_row
->used
[TEXT_AREA
])
4427 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4428 desired_row
->pixel_width
);
4429 rif
->clear_end_of_line (-1);
4432 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4434 /* Otherwise clear to the end of the old row. Everything
4435 after that position should be clear already. */
4438 if (i
>= desired_row
->used
[TEXT_AREA
])
4439 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4440 desired_row
->pixel_width
);
4442 /* If cursor is displayed at the end of the line, make sure
4443 it's cleared. Nowadays we don't have a phys_cursor_glyph
4444 with which to erase the cursor (because this method
4445 doesn't work with lbearing/rbearing), so we must do it
4447 if (vpos
== w
->phys_cursor
.vpos
4448 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4450 w
->phys_cursor_on_p
= 0;
4454 x
= current_row
->pixel_width
;
4455 rif
->clear_end_of_line (x
);
4464 /* Update row VPOS in window W. Value is non-zero if display has been
4468 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4470 int vpos
, *mouse_face_overwritten_p
;
4472 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4473 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4476 /* Set the row being updated. This is important to let xterm.c
4477 know what line height values are in effect. */
4478 updated_row
= desired_row
;
4480 /* A row can be completely invisible in case a desired matrix was
4481 built with a vscroll and then make_cursor_line_fully_visible shifts
4482 the matrix. Make sure to make such rows current anyway, since
4483 we need the correct y-position, for example, in the current matrix. */
4484 if (desired_row
->mode_line_p
4485 || desired_row
->visible_height
> 0)
4487 xassert (desired_row
->enabled_p
);
4489 /* Update display of the left margin area, if there is one. */
4490 if (!desired_row
->full_width_p
4491 && !NILP (w
->left_margin_cols
))
4494 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4497 /* Update the display of the text area. */
4498 if (update_text_area (w
, vpos
))
4501 if (current_row
->mouse_face_p
)
4502 *mouse_face_overwritten_p
= 1;
4505 /* Update display of the right margin area, if there is one. */
4506 if (!desired_row
->full_width_p
4507 && !NILP (w
->right_margin_cols
))
4510 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4513 /* Draw truncation marks etc. */
4514 if (!current_row
->enabled_p
4515 || desired_row
->y
!= current_row
->y
4516 || desired_row
->visible_height
!= current_row
->visible_height
4517 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4518 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4519 || current_row
->redraw_fringe_bitmaps_p
4520 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4521 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4522 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4523 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4524 rif
->after_update_window_line_hook (desired_row
);
4527 /* Update current_row from desired_row. */
4528 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4534 /* Set the cursor after an update of window W. This function may only
4535 be called from update_window. */
4538 set_window_cursor_after_update (w
)
4541 struct frame
*f
= XFRAME (w
->frame
);
4542 int cx
, cy
, vpos
, hpos
;
4544 /* Not intended for frame matrix updates. */
4545 xassert (FRAME_WINDOW_P (f
));
4547 if (cursor_in_echo_area
4548 && !NILP (echo_area_buffer
[0])
4549 /* If we are showing a message instead of the mini-buffer,
4550 show the cursor for the message instead. */
4551 && XWINDOW (minibuf_window
) == w
4552 && EQ (minibuf_window
, echo_area_window
)
4553 /* These cases apply only to the frame that contains
4554 the active mini-buffer window. */
4555 && FRAME_HAS_MINIBUF_P (f
)
4556 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4558 cx
= cy
= vpos
= hpos
= 0;
4560 if (cursor_in_echo_area
>= 0)
4562 /* If the mini-buffer is several lines high, find the last
4563 line that has any text on it. Note: either all lines
4564 are enabled or none. Otherwise we wouldn't be able to
4566 struct glyph_row
*row
, *last_row
;
4567 struct glyph
*glyph
;
4568 int yb
= window_text_bottom_y (w
);
4571 row
= w
->current_matrix
->rows
;
4572 while (row
->enabled_p
4573 && (last_row
== NULL
4574 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4576 if (row
->used
[TEXT_AREA
]
4577 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4584 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4585 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4587 while (last
> start
&& last
->charpos
< 0)
4590 for (glyph
= start
; glyph
< last
; ++glyph
)
4592 cx
+= glyph
->pixel_width
;
4597 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4605 hpos
= w
->cursor
.hpos
;
4606 vpos
= w
->cursor
.vpos
;
4609 /* Window cursor can be out of sync for horizontally split windows. */
4610 hpos
= max (0, hpos
);
4611 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4612 vpos
= max (0, vpos
);
4613 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4614 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4618 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4619 tree rooted at W. */
4622 set_window_update_flags (w
, on_p
)
4628 if (!NILP (w
->hchild
))
4629 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4630 else if (!NILP (w
->vchild
))
4631 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4633 w
->must_be_updated_p
= on_p
;
4635 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4641 /***********************************************************************
4642 Window-Based Scrolling
4643 ***********************************************************************/
4645 /* Structure describing rows in scrolling_window. */
4649 /* Number of occurrences of this row in desired and current matrix. */
4650 int old_uses
, new_uses
;
4652 /* Vpos of row in new matrix. */
4653 int new_line_number
;
4655 /* Bucket index of this row_entry in the hash table row_table. */
4658 /* The row described by this entry. */
4659 struct glyph_row
*row
;
4661 /* Hash collision chain. */
4662 struct row_entry
*next
;
4665 /* A pool to allocate row_entry structures from, and the size of the
4666 pool. The pool is reallocated in scrolling_window when we find
4667 that we need a larger one. */
4669 static struct row_entry
*row_entry_pool
;
4670 static int row_entry_pool_size
;
4672 /* Index of next free entry in row_entry_pool. */
4674 static int row_entry_idx
;
4676 /* The hash table used during scrolling, and the table's size. This
4677 table is used to quickly identify equal rows in the desired and
4680 static struct row_entry
**row_table
;
4681 static int row_table_size
;
4683 /* Vectors of pointers to row_entry structures belonging to the
4684 current and desired matrix, and the size of the vectors. */
4686 static struct row_entry
**old_lines
, **new_lines
;
4687 static int old_lines_size
, new_lines_size
;
4689 /* A pool to allocate run structures from, and its size. */
4691 static struct run
*run_pool
;
4692 static int runs_size
;
4694 /* A vector of runs of lines found during scrolling. */
4696 static struct run
**runs
;
4698 /* Add glyph row ROW to the scrolling hash table during the scrolling
4701 static INLINE
struct row_entry
*
4702 add_row_entry (w
, row
)
4704 struct glyph_row
*row
;
4706 struct row_entry
*entry
;
4707 int i
= row
->hash
% row_table_size
;
4709 entry
= row_table
[i
];
4710 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4711 entry
= entry
->next
;
4715 entry
= row_entry_pool
+ row_entry_idx
++;
4717 entry
->old_uses
= entry
->new_uses
= 0;
4718 entry
->new_line_number
= 0;
4720 entry
->next
= row_table
[i
];
4721 row_table
[i
] = entry
;
4728 /* Try to reuse part of the current display of W by scrolling lines.
4729 HEADER_LINE_P non-zero means W has a header line.
4731 The algorithm is taken from Communications of the ACM, Apr78 "A
4732 Technique for Isolating Differences Between Files." It should take
4735 A short outline of the steps of the algorithm
4737 1. Skip lines equal at the start and end of both matrices.
4739 2. Enter rows in the current and desired matrix into a symbol
4740 table, counting how often they appear in both matrices.
4742 3. Rows that appear exactly once in both matrices serve as anchors,
4743 i.e. we assume that such lines are likely to have been moved.
4745 4. Starting from anchor lines, extend regions to be scrolled both
4746 forward and backward.
4750 -1 if all rows were found to be equal.
4751 0 to indicate that we did not scroll the display, or
4752 1 if we did scroll. */
4755 scrolling_window (w
, header_line_p
)
4759 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4760 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4761 int yb
= window_text_bottom_y (w
);
4762 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4763 int nruns
, nbytes
, n
, run_idx
;
4764 struct row_entry
*entry
;
4766 /* Skip over rows equal at the start. */
4767 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4769 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4770 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4774 && !d
->redraw_fringe_bitmaps_p
4776 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4777 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4778 && row_equal_p (w
, c
, d
, 1))
4787 /* Give up if some rows in the desired matrix are not enabled. */
4788 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4791 first_old
= first_new
= i
;
4793 /* Set last_new to the index + 1 of the last enabled row in the
4796 while (i
< desired_matrix
->nrows
- 1
4797 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4798 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4801 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4806 /* Set last_old to the index + 1 of the last enabled row in the
4807 current matrix. We don't look at the enabled flag here because
4808 we plan to reuse part of the display even if other parts are
4811 while (i
< current_matrix
->nrows
- 1)
4813 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4822 /* Skip over rows equal at the bottom. */
4825 while (i
- 1 > first_new
4826 && j
- 1 > first_old
4827 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4828 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4829 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4830 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4832 MATRIX_ROW (desired_matrix
, i
- 1),
4833 MATRIX_ROW (current_matrix
, j
- 1), 1))
4838 /* Nothing to do if all rows are equal. */
4839 if (last_new
== first_new
)
4842 /* Reallocate vectors, tables etc. if necessary. */
4844 if (current_matrix
->nrows
> old_lines_size
)
4846 old_lines_size
= current_matrix
->nrows
;
4847 nbytes
= old_lines_size
* sizeof *old_lines
;
4848 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4851 if (desired_matrix
->nrows
> new_lines_size
)
4853 new_lines_size
= desired_matrix
->nrows
;
4854 nbytes
= new_lines_size
* sizeof *new_lines
;
4855 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4858 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4859 if (3 * n
> row_table_size
)
4861 row_table_size
= next_almost_prime (3 * n
);
4862 nbytes
= row_table_size
* sizeof *row_table
;
4863 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4864 bzero (row_table
, nbytes
);
4867 if (n
> row_entry_pool_size
)
4869 row_entry_pool_size
= n
;
4870 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4871 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4874 if (desired_matrix
->nrows
> runs_size
)
4876 runs_size
= desired_matrix
->nrows
;
4877 nbytes
= runs_size
* sizeof *runs
;
4878 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4879 nbytes
= runs_size
* sizeof *run_pool
;
4880 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4883 nruns
= run_idx
= 0;
4886 /* Add rows from the current and desired matrix to the hash table
4887 row_hash_table to be able to find equal ones quickly. */
4889 for (i
= first_old
; i
< last_old
; ++i
)
4891 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4893 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4894 old_lines
[i
] = entry
;
4898 old_lines
[i
] = NULL
;
4901 for (i
= first_new
; i
< last_new
; ++i
)
4903 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4904 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4906 entry
->new_line_number
= i
;
4907 new_lines
[i
] = entry
;
4910 /* Identify moves based on lines that are unique and equal
4911 in both matrices. */
4912 for (i
= first_old
; i
< last_old
;)
4914 && old_lines
[i
]->old_uses
== 1
4915 && old_lines
[i
]->new_uses
== 1)
4918 int new_line
= old_lines
[i
]->new_line_number
;
4919 struct run
*run
= run_pool
+ run_idx
++;
4922 run
->current_vpos
= i
;
4923 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4924 run
->desired_vpos
= new_line
;
4925 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4927 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4929 /* Extend backward. */
4932 while (j
> first_old
4934 && old_lines
[j
] == new_lines
[k
])
4936 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4937 --run
->current_vpos
;
4938 --run
->desired_vpos
;
4941 run
->desired_y
-= h
;
4942 run
->current_y
-= h
;
4946 /* Extend forward. */
4951 && old_lines
[j
] == new_lines
[k
])
4953 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4959 /* Insert run into list of all runs. Order runs by copied
4960 pixel lines. Note that we record runs that don't have to
4961 be copied because they are already in place. This is done
4962 because we can avoid calling update_window_line in this
4964 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4966 for (k
= nruns
; k
> j
; --k
)
4967 runs
[k
] = runs
[k
- 1];
4976 /* Do the moves. Do it in a way that we don't overwrite something
4977 we want to copy later on. This is not solvable in general
4978 because there is only one display and we don't have a way to
4979 exchange areas on this display. Example:
4981 +-----------+ +-----------+
4983 +-----------+ --> +-----------+
4985 +-----------+ +-----------+
4987 Instead, prefer bigger moves, and invalidate moves that would
4988 copy from where we copied to. */
4990 for (i
= 0; i
< nruns
; ++i
)
4991 if (runs
[i
]->nrows
> 0)
4993 struct run
*r
= runs
[i
];
4995 /* Copy on the display. */
4996 if (r
->current_y
!= r
->desired_y
)
4998 rif
->scroll_run_hook (w
, r
);
5000 /* Invalidate runs that copy from where we copied to. */
5001 for (j
= i
+ 1; j
< nruns
; ++j
)
5003 struct run
*p
= runs
[j
];
5005 if ((p
->current_y
>= r
->desired_y
5006 && p
->current_y
< r
->desired_y
+ r
->height
)
5007 || (p
->current_y
+ p
->height
>= r
->desired_y
5008 && (p
->current_y
+ p
->height
5009 < r
->desired_y
+ r
->height
)))
5014 /* Assign matrix rows. */
5015 for (j
= 0; j
< r
->nrows
; ++j
)
5017 struct glyph_row
*from
, *to
;
5018 int to_overlapped_p
;
5020 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5021 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5022 to_overlapped_p
= to
->overlapped_p
;
5023 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5024 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5025 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5026 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5027 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5028 || to
->overlay_arrow_p
!= from
->overlay_arrow_p
))
5029 from
->redraw_fringe_bitmaps_p
= 1;
5030 assign_row (to
, from
);
5031 to
->enabled_p
= 1, from
->enabled_p
= 0;
5032 to
->overlapped_p
= to_overlapped_p
;
5036 /* Clear the hash table, for the next time. */
5037 for (i
= 0; i
< row_entry_idx
; ++i
)
5038 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5040 /* Value is > 0 to indicate that we scrolled the display. */
5046 /************************************************************************
5048 ************************************************************************/
5050 /* Update the desired frame matrix of frame F.
5052 FORCE_P non-zero means that the update should not be stopped by
5053 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5054 should not be tried.
5056 Value is non-zero if update was stopped due to pending input. */
5059 update_frame_1 (f
, force_p
, inhibit_id_p
)
5064 /* Frame matrices to work on. */
5065 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5066 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5069 int preempt_count
= baud_rate
/ 2400 + 1;
5070 extern int input_pending
;
5072 xassert (current_matrix
&& desired_matrix
);
5074 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5075 calculate_costs (f
);
5077 if (preempt_count
<= 0)
5080 if (redisplay_dont_pause
)
5082 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5088 /* If we cannot insert/delete lines, it's no use trying it. */
5089 if (!line_ins_del_ok
)
5092 /* See if any of the desired lines are enabled; don't compute for
5093 i/d line if just want cursor motion. */
5094 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5095 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5098 /* Try doing i/d line, if not yet inhibited. */
5099 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5100 force_p
|= scrolling (f
);
5102 /* Update the individual lines as needed. Do bottom line first. */
5103 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5104 update_frame_line (f
, desired_matrix
->nrows
- 1);
5106 /* Now update the rest of the lines. */
5107 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5109 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5111 if (FRAME_TERMCAP_P (f
))
5113 /* Flush out every so many lines.
5114 Also flush out if likely to have more than 1k buffered
5115 otherwise. I'm told that some telnet connections get
5116 really screwed by more than 1k output at once. */
5117 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5119 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5122 if (preempt_count
== 1)
5124 #ifdef EMACS_OUTQSIZE
5125 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5126 /* Probably not a tty. Ignore the error and reset
5128 outq
= PENDING_OUTPUT_COUNT (stdout
);
5131 if (baud_rate
<= outq
&& baud_rate
> 0)
5132 sleep (outq
/ baud_rate
);
5137 if ((i
- 1) % preempt_count
== 0)
5138 detect_input_pending_ignore_squeezables ();
5140 update_frame_line (f
, i
);
5144 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5146 /* Now just clean up termcap drivers and set cursor, etc. */
5149 if ((cursor_in_echo_area
5150 /* If we are showing a message instead of the mini-buffer,
5151 show the cursor for the message instead of for the
5152 (now hidden) mini-buffer contents. */
5153 || (EQ (minibuf_window
, selected_window
)
5154 && EQ (minibuf_window
, echo_area_window
)
5155 && !NILP (echo_area_buffer
[0])))
5156 /* These cases apply only to the frame that contains
5157 the active mini-buffer window. */
5158 && FRAME_HAS_MINIBUF_P (f
)
5159 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5161 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5164 if (cursor_in_echo_area
< 0)
5166 /* Negative value of cursor_in_echo_area means put
5167 cursor at beginning of line. */
5173 /* Positive value of cursor_in_echo_area means put
5174 cursor at the end of the prompt. If the mini-buffer
5175 is several lines high, find the last line that has
5177 row
= FRAME_LINES (f
);
5183 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5185 /* Frame rows are filled up with spaces that
5186 must be ignored here. */
5187 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5189 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5190 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5193 && (last
- 1)->charpos
< 0)
5199 while (row
> top
&& col
== 0);
5201 /* Make sure COL is not out of range. */
5202 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5204 /* If we have another row, advance cursor into it. */
5205 if (row
< FRAME_LINES (f
) - 1)
5207 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5210 /* Otherwise move it back in range. */
5212 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5216 cursor_to (row
, col
);
5220 /* We have only one cursor on terminal frames. Use it to
5221 display the cursor of the selected window. */
5222 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5223 if (w
->cursor
.vpos
>= 0
5224 /* The cursor vpos may be temporarily out of bounds
5225 in the following situation: There is one window,
5226 with the cursor in the lower half of it. The window
5227 is split, and a message causes a redisplay before
5228 a new cursor position has been computed. */
5229 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5231 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5232 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5234 if (INTEGERP (w
->left_margin_cols
))
5235 x
+= XFASTINT (w
->left_margin_cols
);
5237 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5245 clear_desired_matrices (f
);
5250 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5254 struct frame
*frame
;
5256 int unchanged_at_top
, unchanged_at_bottom
;
5259 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5260 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5261 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5262 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5264 int free_at_end_vpos
= FRAME_LINES (frame
);
5265 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5266 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5268 if (!current_matrix
)
5271 /* Compute hash codes of all the lines. Also calculate number of
5272 changed lines, number of unchanged lines at the beginning, and
5273 number of unchanged lines at the end. */
5275 unchanged_at_top
= 0;
5276 unchanged_at_bottom
= FRAME_LINES (frame
);
5277 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5279 /* Give up on this scrolling if some old lines are not enabled. */
5280 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5282 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5283 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5285 /* This line cannot be redrawn, so don't let scrolling mess it. */
5286 new_hash
[i
] = old_hash
[i
];
5287 #define INFINITY 1000000 /* Taken from scroll.c */
5288 draw_cost
[i
] = INFINITY
;
5292 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5293 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5296 if (old_hash
[i
] != new_hash
[i
])
5299 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5301 else if (i
== unchanged_at_top
)
5303 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5306 /* If changed lines are few, don't allow preemption, don't scroll. */
5307 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5308 || unchanged_at_bottom
== FRAME_LINES (frame
))
5311 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5312 - unchanged_at_bottom
);
5314 if (scroll_region_ok
)
5315 free_at_end_vpos
-= unchanged_at_bottom
;
5316 else if (memory_below_frame
)
5317 free_at_end_vpos
= -1;
5319 /* If large window, fast terminal and few lines in common between
5320 current frame and desired frame, don't bother with i/d calc. */
5321 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5323 10 * scrolling_max_lines_saved (unchanged_at_top
,
5324 FRAME_LINES (frame
) - unchanged_at_bottom
,
5325 old_hash
, new_hash
, draw_cost
)))
5328 if (window_size
< 2)
5331 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5332 draw_cost
+ unchanged_at_top
- 1,
5333 old_draw_cost
+ unchanged_at_top
- 1,
5334 old_hash
+ unchanged_at_top
- 1,
5335 new_hash
+ unchanged_at_top
- 1,
5336 free_at_end_vpos
- unchanged_at_top
);
5342 /* Count the number of blanks at the start of the vector of glyphs R
5343 which is LEN glyphs long. */
5346 count_blanks (r
, len
)
5352 for (i
= 0; i
< len
; ++i
)
5353 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5360 /* Count the number of glyphs in common at the start of the glyph
5361 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5362 of STR2. Value is the number of equal glyphs equal at the start. */
5365 count_match (str1
, end1
, str2
, end2
)
5366 struct glyph
*str1
, *end1
, *str2
, *end2
;
5368 struct glyph
*p1
= str1
;
5369 struct glyph
*p2
= str2
;
5373 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5380 /* Char insertion/deletion cost vector, from term.c */
5382 extern int *char_ins_del_vector
;
5383 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5386 /* Perform a frame-based update on line VPOS in frame FRAME. */
5389 update_frame_line (f
, vpos
)
5393 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5395 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5396 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5397 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5398 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5399 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5400 int must_write_whole_line_p
;
5401 int write_spaces_p
= must_write_spaces
;
5402 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5403 != FACE_TTY_DEFAULT_BG_COLOR
);
5405 if (colored_spaces_p
)
5408 /* Current row not enabled means it has unknown contents. We must
5409 write the whole desired line in that case. */
5410 must_write_whole_line_p
= !current_row
->enabled_p
;
5411 if (must_write_whole_line_p
)
5418 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5419 olen
= current_row
->used
[TEXT_AREA
];
5421 /* Ignore trailing spaces, if we can. */
5422 if (!write_spaces_p
)
5423 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5427 current_row
->enabled_p
= 1;
5428 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5430 /* If desired line is empty, just clear the line. */
5431 if (!desired_row
->enabled_p
)
5437 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5438 nlen
= desired_row
->used
[TEXT_AREA
];
5439 nend
= nbody
+ nlen
;
5441 /* If display line has unknown contents, write the whole line. */
5442 if (must_write_whole_line_p
)
5444 /* Ignore spaces at the end, if we can. */
5445 if (!write_spaces_p
)
5446 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5449 /* Write the contents of the desired line. */
5452 cursor_to (vpos
, 0);
5453 write_glyphs (nbody
, nlen
);
5456 /* Don't call clear_end_of_line if we already wrote the whole
5457 line. The cursor will not be at the right margin in that
5458 case but in the line below. */
5459 if (nlen
< FRAME_TOTAL_COLS (f
))
5461 cursor_to (vpos
, nlen
);
5462 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5465 /* Make sure we are in the right row, otherwise cursor movement
5466 with cmgoto might use `ch' in the wrong row. */
5467 cursor_to (vpos
, 0);
5469 make_current (desired_matrix
, current_matrix
, vpos
);
5473 /* Pretend trailing spaces are not there at all,
5474 unless for one reason or another we must write all spaces. */
5475 if (!write_spaces_p
)
5476 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5479 /* If there's no i/d char, quickly do the best we can without it. */
5480 if (!char_ins_del_ok
)
5484 /* Find the first glyph in desired row that doesn't agree with
5485 a glyph in the current row, and write the rest from there on. */
5486 for (i
= 0; i
< nlen
; i
++)
5488 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5490 /* Find the end of the run of different glyphs. */
5494 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5495 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5498 /* Output this run of non-matching chars. */
5499 cursor_to (vpos
, i
);
5500 write_glyphs (nbody
+ i
, j
- i
);
5503 /* Now find the next non-match. */
5507 /* Clear the rest of the line, or the non-clear part of it. */
5510 cursor_to (vpos
, nlen
);
5511 clear_end_of_line (olen
);
5514 /* Make current row = desired row. */
5515 make_current (desired_matrix
, current_matrix
, vpos
);
5519 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5520 characters in a row. */
5524 /* If current line is blank, skip over initial spaces, if
5525 possible, and write the rest. */
5529 nsp
= count_blanks (nbody
, nlen
);
5533 cursor_to (vpos
, nsp
);
5534 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5537 /* Exchange contents between current_frame and new_frame. */
5538 make_current (desired_matrix
, current_matrix
, vpos
);
5542 /* Compute number of leading blanks in old and new contents. */
5543 osp
= count_blanks (obody
, olen
);
5544 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5546 /* Compute number of matching chars starting with first non-blank. */
5547 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5548 nbody
+ nsp
, nbody
+ nlen
);
5550 /* Spaces in new match implicit space past the end of old. */
5551 /* A bug causing this to be a no-op was fixed in 18.29. */
5552 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5555 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5559 /* Avoid doing insert/delete char
5560 just cause number of leading spaces differs
5561 when the following text does not match. */
5562 if (begmatch
== 0 && osp
!= nsp
)
5563 osp
= nsp
= min (osp
, nsp
);
5565 /* Find matching characters at end of line */
5568 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5570 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5575 endmatch
= obody
+ olen
- op1
;
5577 /* tem gets the distance to insert or delete.
5578 endmatch is how many characters we save by doing so.
5581 tem
= (nlen
- nsp
) - (olen
- osp
);
5583 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5586 /* nsp - osp is the distance to insert or delete.
5587 If that is nonzero, begmatch is known to be nonzero also.
5588 begmatch + endmatch is how much we save by doing the ins/del.
5592 && (!char_ins_del_ok
5593 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5597 osp
= nsp
= min (osp
, nsp
);
5600 /* Now go through the line, inserting, writing and
5601 deleting as appropriate. */
5605 cursor_to (vpos
, nsp
);
5606 delete_glyphs (osp
- nsp
);
5610 /* If going to delete chars later in line
5611 and insert earlier in the line,
5612 must delete first to avoid losing data in the insert */
5613 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5615 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5616 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5617 olen
= nlen
- (nsp
- osp
);
5619 cursor_to (vpos
, osp
);
5620 insert_glyphs (0, nsp
- osp
);
5624 tem
= nsp
+ begmatch
+ endmatch
;
5625 if (nlen
!= tem
|| olen
!= tem
)
5627 if (!endmatch
|| nlen
== olen
)
5629 /* If new text being written reaches right margin, there is
5630 no need to do clear-to-eol at the end of this function
5631 (and it would not be safe, since cursor is not going to
5632 be "at the margin" after the text is done). */
5633 if (nlen
== FRAME_TOTAL_COLS (f
))
5636 /* Function write_glyphs is prepared to do nothing
5637 if passed a length <= 0. Check it here to avoid
5638 unnecessary cursor movement. */
5641 cursor_to (vpos
, nsp
+ begmatch
);
5642 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5645 else if (nlen
> olen
)
5647 /* Here, we used to have the following simple code:
5648 ----------------------------------------
5649 write_glyphs (nbody + nsp + begmatch, olen - tem);
5650 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5651 ----------------------------------------
5652 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5653 is a padding glyph. */
5654 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5657 cursor_to (vpos
, nsp
+ begmatch
);
5659 /* Calculate columns we can actually overwrite. */
5660 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5662 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5664 /* If we left columns to be overwritten, we must delete them. */
5665 del
= olen
- tem
- out
;
5667 delete_glyphs (del
);
5669 /* At last, we insert columns not yet written out. */
5670 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5673 else if (olen
> nlen
)
5675 cursor_to (vpos
, nsp
+ begmatch
);
5676 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5677 delete_glyphs (olen
- nlen
);
5683 /* If any unerased characters remain after the new line, erase them. */
5686 cursor_to (vpos
, nlen
);
5687 clear_end_of_line (olen
);
5690 /* Exchange contents between current_frame and new_frame. */
5691 make_current (desired_matrix
, current_matrix
, vpos
);
5696 /***********************************************************************
5697 X/Y Position -> Buffer Position
5698 ***********************************************************************/
5700 /* Determine what's under window-relative pixel position (*X, *Y).
5701 Return the object (string or buffer) that's there.
5702 Return in *POS the position in that object.
5703 Adjust *X and *Y to character positions. */
5706 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5709 struct display_pos
*pos
;
5710 Lisp_Object
*object
;
5712 int *width
, *height
;
5715 struct buffer
*old_current_buffer
= current_buffer
;
5716 struct text_pos startp
;
5718 struct glyph_row
*row
;
5719 #ifdef HAVE_WINDOW_SYSTEM
5720 struct image
*img
= 0;
5724 current_buffer
= XBUFFER (w
->buffer
);
5725 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5726 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5727 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5728 start_display (&it
, w
, startp
);
5730 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5731 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5732 MOVE_TO_X
| MOVE_TO_Y
);
5734 current_buffer
= old_current_buffer
;
5736 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5737 *dy
= *y
- it
.current_y
;
5740 if (STRINGP (it
.string
))
5744 #ifdef HAVE_WINDOW_SYSTEM
5745 if (it
.what
== IT_IMAGE
)
5747 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5748 && !NILP (img
->spec
))
5749 *object
= img
->spec
;
5753 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5756 if (it
.hpos
< row
->used
[TEXT_AREA
])
5758 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5759 #ifdef HAVE_WINDOW_SYSTEM
5762 *dy
-= row
->ascent
- glyph
->ascent
;
5763 *dx
+= glyph
->slice
.x
;
5764 *dy
+= glyph
->slice
.y
;
5765 /* Image slices positions are still relative to the entire image */
5766 *width
= img
->width
;
5767 *height
= img
->height
;
5772 *width
= glyph
->pixel_width
;
5773 *height
= glyph
->ascent
+ glyph
->descent
;
5779 *height
= row
->height
;
5784 *width
= *height
= 0;
5787 /* Add extra (default width) columns if clicked after EOL. */
5788 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5790 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5799 /* Value is the string under window-relative coordinates X/Y in the
5800 mode line or header line (PART says which) of window W, or nil if none.
5801 *CHARPOS is set to the position in the string returned. */
5804 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5806 enum window_part part
;
5809 Lisp_Object
*object
;
5811 int *width
, *height
;
5813 struct glyph_row
*row
;
5814 struct glyph
*glyph
, *end
;
5816 Lisp_Object string
= Qnil
;
5818 if (part
== ON_MODE_LINE
)
5819 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5821 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5823 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5825 if (row
->mode_line_p
&& row
->enabled_p
)
5827 /* Find the glyph under X. If we find one with a string object,
5828 it's the one we were looking for. */
5829 glyph
= row
->glyphs
[TEXT_AREA
];
5830 end
= glyph
+ row
->used
[TEXT_AREA
];
5831 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5832 x0
-= glyph
->pixel_width
;
5833 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5836 string
= glyph
->object
;
5837 *charpos
= glyph
->charpos
;
5838 *width
= glyph
->pixel_width
;
5839 *height
= glyph
->ascent
+ glyph
->descent
;
5840 #ifdef HAVE_WINDOW_SYSTEM
5841 if (glyph
->type
== IMAGE_GLYPH
)
5844 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5846 *object
= img
->spec
;
5847 y0
-= row
->ascent
- glyph
->ascent
;
5853 /* Add extra (default width) columns if clicked after EOL. */
5854 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5856 *height
= row
->height
;
5863 *width
= *height
= 0;
5873 /* Value is the string under window-relative coordinates X/Y in either
5874 marginal area, or nil if none. *CHARPOS is set to the position in
5875 the string returned. */
5878 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5880 enum window_part part
;
5883 Lisp_Object
*object
;
5885 int *width
, *height
;
5887 struct glyph_row
*row
= w
->current_matrix
->rows
;
5888 struct glyph
*glyph
, *end
;
5889 int x0
, y0
, i
, wy
= *y
;
5891 Lisp_Object string
= Qnil
;
5893 if (part
== ON_LEFT_MARGIN
)
5894 area
= LEFT_MARGIN_AREA
;
5895 else if (part
== ON_RIGHT_MARGIN
)
5896 area
= RIGHT_MARGIN_AREA
;
5900 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5901 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5904 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5908 /* Find the glyph under X. If we find one with a string object,
5909 it's the one we were looking for. */
5910 if (area
== RIGHT_MARGIN_AREA
)
5911 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5912 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5913 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5914 + window_box_width (w
, LEFT_MARGIN_AREA
)
5915 + window_box_width (w
, TEXT_AREA
));
5917 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5918 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5921 glyph
= row
->glyphs
[area
];
5922 end
= glyph
+ row
->used
[area
];
5923 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5924 x0
-= glyph
->pixel_width
;
5925 *x
= glyph
- row
->glyphs
[area
];
5928 string
= glyph
->object
;
5929 *charpos
= glyph
->charpos
;
5930 *width
= glyph
->pixel_width
;
5931 *height
= glyph
->ascent
+ glyph
->descent
;
5932 #ifdef HAVE_WINDOW_SYSTEM
5933 if (glyph
->type
== IMAGE_GLYPH
)
5936 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5938 *object
= img
->spec
;
5939 y0
-= row
->ascent
- glyph
->ascent
;
5940 x0
+= glyph
->slice
.x
;
5941 y0
+= glyph
->slice
.y
;
5947 /* Add extra (default width) columns if clicked after EOL. */
5948 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5950 *height
= row
->height
;
5957 *width
= *height
= 0;
5967 /***********************************************************************
5968 Changing Frame Sizes
5969 ***********************************************************************/
5974 window_change_signal (signalnum
) /* If we don't have an argument, */
5975 int signalnum
; /* some compilers complain in signal calls. */
5981 int old_errno
= errno
;
5983 signal (SIGWINCH
, window_change_signal
);
5984 SIGNAL_THREAD_CHECK (signalnum
);
5986 get_frame_size (&width
, &height
);
5988 /* The frame size change obviously applies to a termcap-controlled
5989 frame. Find such a frame in the list, and assume it's the only
5990 one (since the redisplay code always writes to stdout, not a
5991 FILE * specified in the frame structure). Record the new size,
5992 but don't reallocate the data structures now. Let that be done
5993 later outside of the signal handler. */
5996 Lisp_Object tail
, frame
;
5998 FOR_EACH_FRAME (tail
, frame
)
6000 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6002 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6010 #endif /* SIGWINCH */
6013 /* Do any change in frame size that was requested by a signal. SAFE
6014 non-zero means this function is called from a place where it is
6015 safe to change frame sizes while a redisplay is in progress. */
6018 do_pending_window_change (safe
)
6021 /* If window_change_signal should have run before, run it now. */
6022 if (redisplaying_p
&& !safe
)
6025 while (delayed_size_change
)
6027 Lisp_Object tail
, frame
;
6029 delayed_size_change
= 0;
6031 FOR_EACH_FRAME (tail
, frame
)
6033 struct frame
*f
= XFRAME (frame
);
6035 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6036 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6043 /* Change the frame height and/or width. Values may be given as zero to
6044 indicate no change is to take place.
6046 If DELAY is non-zero, then assume we're being called from a signal
6047 handler, and queue the change for later - perhaps the next
6048 redisplay. Since this tries to resize windows, we can't call it
6049 from a signal handler.
6051 SAFE non-zero means this function is called from a place where it's
6052 safe to change frame sizes while a redisplay is in progress. */
6055 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6056 register struct frame
*f
;
6057 int newheight
, newwidth
, pretend
, delay
, safe
;
6059 Lisp_Object tail
, frame
;
6061 if (! FRAME_WINDOW_P (f
))
6063 /* When using termcap, or on MS-DOS, all frames use
6064 the same screen, so a change in size affects all frames. */
6065 FOR_EACH_FRAME (tail
, frame
)
6066 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6067 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6068 pretend
, delay
, safe
);
6071 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6075 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6076 register struct frame
*f
;
6077 int newheight
, newwidth
, pretend
, delay
, safe
;
6079 int new_frame_total_cols
;
6080 int count
= SPECPDL_INDEX ();
6082 /* If we can't deal with the change now, queue it for later. */
6083 if (delay
|| (redisplaying_p
&& !safe
))
6085 f
->new_text_lines
= newheight
;
6086 f
->new_text_cols
= newwidth
;
6087 delayed_size_change
= 1;
6091 /* This size-change overrides any pending one for this frame. */
6092 f
->new_text_lines
= 0;
6093 f
->new_text_cols
= 0;
6095 /* If an argument is zero, set it to the current value. */
6097 newheight
= FRAME_LINES (f
);
6099 newwidth
= FRAME_COLS (f
);
6101 /* Compute width of windows in F.
6102 This is the width of the frame without vertical scroll bars. */
6103 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6105 /* Round up to the smallest acceptable size. */
6106 check_frame_size (f
, &newheight
, &newwidth
);
6108 /* If we're not changing the frame size, quit now. */
6109 if (newheight
== FRAME_LINES (f
)
6110 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6116 /* We only can set screen dimensions to certain values supported
6117 by our video hardware. Try to find the smallest size greater
6118 or equal to the requested dimensions. */
6119 dos_set_window_size (&newheight
, &newwidth
);
6122 if (newheight
!= FRAME_LINES (f
))
6124 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6126 /* Frame has both root and mini-buffer. */
6127 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6128 FRAME_TOP_MARGIN (f
));
6129 set_window_height (FRAME_ROOT_WINDOW (f
),
6132 - FRAME_TOP_MARGIN (f
)),
6134 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6136 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6139 /* Frame has just one top-level window. */
6140 set_window_height (FRAME_ROOT_WINDOW (f
),
6141 newheight
- FRAME_TOP_MARGIN (f
), 0);
6143 if (FRAME_TERMCAP_P (f
) && !pretend
)
6144 FrameRows
= newheight
;
6147 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6149 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6150 if (FRAME_HAS_MINIBUF_P (f
))
6151 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6153 if (FRAME_TERMCAP_P (f
) && !pretend
)
6154 FrameCols
= newwidth
;
6156 if (WINDOWP (f
->tool_bar_window
))
6157 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6160 FRAME_LINES (f
) = newheight
;
6161 SET_FRAME_COLS (f
, newwidth
);
6164 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6165 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6167 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6169 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6170 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6171 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6172 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6176 calculate_costs (f
);
6177 SET_FRAME_GARBAGED (f
);
6182 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6184 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6185 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6186 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6188 unbind_to (count
, Qnil
);
6193 /***********************************************************************
6194 Terminal Related Lisp Functions
6195 ***********************************************************************/
6197 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6198 1, 1, "FOpen termscript file: ",
6199 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6200 FILE = nil means just close any termscript file currently open. */)
6204 if (termscript
!= 0) fclose (termscript
);
6209 file
= Fexpand_file_name (file
, Qnil
);
6210 termscript
= fopen (SDATA (file
), "w");
6211 if (termscript
== 0)
6212 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6218 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6219 Ssend_string_to_terminal
, 1, 1, 0,
6220 doc
: /* Send STRING to the terminal without alteration.
6221 Control characters in STRING will have terminal-dependent effects. */)
6225 /* ??? Perhaps we should do something special for multibyte strings here. */
6226 CHECK_STRING (string
);
6227 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6231 fwrite (SDATA (string
), 1, SBYTES (string
),
6233 fflush (termscript
);
6239 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6240 doc
: /* Beep, or flash the screen.
6241 Also, unless an argument is given,
6242 terminate any keyboard macro currently executing. */)
6265 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6266 error ("Keyboard macro terminated by a command ringing the bell");
6274 /***********************************************************************
6276 ***********************************************************************/
6278 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6279 doc
: /* Pause, without updating display, for SECONDS seconds.
6280 SECONDS may be a floating-point value, meaning that you can wait for a
6281 fraction of a second. Optional second arg MILLISECONDS specifies an
6282 additional wait period, in milliseconds; this may be useful if your
6283 Emacs was built without floating point support.
6284 \(Not all operating systems support waiting for a fraction of a second.) */)
6285 (seconds
, milliseconds
)
6286 Lisp_Object seconds
, milliseconds
;
6290 if (NILP (milliseconds
))
6291 XSETINT (milliseconds
, 0);
6293 CHECK_NUMBER (milliseconds
);
6294 usec
= XINT (milliseconds
) * 1000;
6297 double duration
= extract_float (seconds
);
6298 sec
= (int) duration
;
6299 usec
+= (duration
- sec
) * 1000000;
6302 #ifndef EMACS_HAS_USECS
6303 if (sec
== 0 && usec
!= 0)
6304 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6307 /* Assure that 0 <= usec < 1000000. */
6310 /* We can't rely on the rounding being correct if usec is negative. */
6311 if (-1000000 < usec
)
6312 sec
--, usec
+= 1000000;
6314 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6317 sec
+= usec
/ 1000000, usec
%= 1000000;
6319 if (sec
< 0 || (sec
== 0 && usec
== 0))
6322 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6328 /* This is just like wait_reading_process_output, except that
6329 it does the redisplay.
6331 It's also much like Fsit_for, except that it can be used for
6332 waiting for input as well. */
6335 sit_for (sec
, usec
, reading
, display
, initial_display
)
6336 int sec
, usec
, reading
, display
, initial_display
;
6338 swallow_events (display
);
6340 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6343 if (initial_display
)
6344 redisplay_preserve_echo_area (2);
6346 if (sec
== 0 && usec
== 0)
6353 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6356 return detect_input_pending () ? Qnil
: Qt
;
6360 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6361 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6362 SECONDS may be a floating-point value, meaning that you can wait for a
6363 fraction of a second.
6364 \(Not all operating systems support waiting for a fraction of a second.)
6365 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6366 Redisplay is preempted as always if input arrives, and does not happen
6367 if input is available before it starts.
6368 Value is t if waited the full time with no input arriving.
6370 An obsolete but still supported form is
6371 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6372 Where the optional arg MILLISECONDS specifies an additional wait period,
6373 in milliseconds; this was useful when Emacs was built without
6374 floating point support.
6375 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6377 /* The `old-nodisp' stuff is there so that the arglist has the correct
6378 length. Otherwise, `defdvice' will redefine it with fewer args. */
6379 (seconds
, milliseconds
, nodisp
)
6380 Lisp_Object seconds
, milliseconds
, nodisp
;
6384 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6386 nodisp
= milliseconds
;
6387 milliseconds
= Qnil
;
6390 if (NILP (milliseconds
))
6391 XSETINT (milliseconds
, 0);
6393 CHECK_NUMBER (milliseconds
);
6394 usec
= XINT (milliseconds
) * 1000;
6397 double duration
= extract_float (seconds
);
6398 sec
= (int) duration
;
6399 usec
+= (duration
- sec
) * 1000000;
6402 #ifndef EMACS_HAS_USECS
6403 if (usec
!= 0 && sec
== 0)
6404 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6407 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6412 /***********************************************************************
6413 Other Lisp Functions
6414 ***********************************************************************/
6416 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6417 session's frames, frame names, buffers, buffer-read-only flags, and
6418 buffer-modified-flags, and a trailing sentinel (so we don't need to
6419 add length checks). */
6421 static Lisp_Object frame_and_buffer_state
;
6424 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6425 Sframe_or_buffer_changed_p
, 0, 0, 0,
6426 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6427 The state variable is an internal vector containing all frames and buffers,
6428 aside from buffers whose names start with space,
6429 along with the buffers' read-only and modified flags, which allows a fast
6430 check to see whether the menu bars might need to be recomputed.
6431 If this function returns non-nil, it updates the internal vector to reflect
6432 the current state. */)
6435 Lisp_Object tail
, frame
, buf
;
6439 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6440 FOR_EACH_FRAME (tail
, frame
)
6442 if (!EQ (*vecp
++, frame
))
6444 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6447 /* Check that the buffer info matches.
6448 No need to test for the end of the vector
6449 because the last element of the vector is lambda
6450 and that will always cause a mismatch. */
6451 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6453 buf
= XCDR (XCAR (tail
));
6454 /* Ignore buffers that aren't included in buffer lists. */
6455 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6457 if (!EQ (*vecp
++, buf
))
6459 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6461 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6464 /* Detect deletion of a buffer at the end of the list. */
6465 if (EQ (*vecp
, Qlambda
))
6468 /* Start with 1 so there is room for at least one lambda at the end. */
6470 FOR_EACH_FRAME (tail
, frame
)
6472 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6474 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6475 if (n
> XVECTOR (frame_and_buffer_state
)->size
6476 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6477 /* Add 20 extra so we grow it less often. */
6478 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6479 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6480 FOR_EACH_FRAME (tail
, frame
)
6483 *vecp
++ = XFRAME (frame
)->name
;
6485 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6487 buf
= XCDR (XCAR (tail
));
6488 /* Ignore buffers that aren't included in buffer lists. */
6489 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6492 *vecp
++ = XBUFFER (buf
)->read_only
;
6493 *vecp
++ = Fbuffer_modified_p (buf
);
6495 /* Fill up the vector with lambdas (always at least one). */
6497 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6498 < XVECTOR (frame_and_buffer_state
)->size
)
6500 /* Make sure we didn't overflow the vector. */
6501 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6502 > XVECTOR (frame_and_buffer_state
)->size
)
6509 /***********************************************************************
6511 ***********************************************************************/
6513 char *terminal_type
;
6515 /* Initialization done when Emacs fork is started, before doing stty.
6516 Determine terminal type and set terminal_driver. Then invoke its
6517 decoding routine to set up variables in the terminal package. */
6522 #ifdef HAVE_X_WINDOWS
6523 extern int display_arg
;
6526 /* Construct the space glyph. */
6527 space_glyph
.type
= CHAR_GLYPH
;
6528 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6529 space_glyph
.charpos
= -1;
6533 cursor_in_echo_area
= 0;
6534 terminal_type
= (char *) 0;
6536 /* Now is the time to initialize this; it's used by init_sys_modes
6538 Vwindow_system
= Qnil
;
6540 /* If the user wants to use a window system, we shouldn't bother
6541 initializing the terminal. This is especially important when the
6542 terminal is so dumb that emacs gives up before and doesn't bother
6543 using the window system.
6545 If the DISPLAY environment variable is set and nonempty,
6546 try to use X, and die with an error message if that doesn't work. */
6548 #ifdef HAVE_X_WINDOWS
6553 display
= getenv ("DECW$DISPLAY");
6555 display
= getenv ("DISPLAY");
6558 display_arg
= (display
!= 0 && *display
!= 0);
6561 if (!inhibit_window_system
&& display_arg
6567 Vwindow_system
= intern ("x");
6569 Vwindow_system_version
= make_number (11);
6571 Vwindow_system_version
= make_number (10);
6573 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6574 /* In some versions of ncurses,
6575 tputs crashes if we have not called tgetent.
6577 { char b
[2044]; tgetent (b
, "xterm");}
6579 adjust_frame_glyphs_initially ();
6582 #endif /* HAVE_X_WINDOWS */
6585 if (!inhibit_window_system
)
6587 Vwindow_system
= intern ("w32");
6588 Vwindow_system_version
= make_number (1);
6589 adjust_frame_glyphs_initially ();
6592 #endif /* HAVE_NTGUI */
6595 if (!inhibit_window_system
)
6597 Vwindow_system
= intern ("mac");
6598 Vwindow_system_version
= make_number (1);
6599 adjust_frame_glyphs_initially ();
6604 /* If no window system has been specified, try to use the terminal. */
6607 fatal ("standard input is not a tty");
6611 /* Look at the TERM variable. */
6612 terminal_type
= (char *) getenv ("TERM");
6616 fprintf (stderr
, "Please specify your terminal type.\n\
6617 For types defined in VMS, use set term /device=TYPE.\n\
6618 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6619 \(The quotation marks are necessary since terminal types are lower case.)\n");
6621 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6627 /* VMS DCL tends to up-case things, so down-case term type.
6628 Hardly any uppercase letters in terminal types; should be none. */
6630 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6633 strcpy (new, terminal_type
);
6635 for (p
= new; *p
; p
++)
6639 terminal_type
= new;
6643 term_init (terminal_type
);
6646 struct frame
*sf
= SELECTED_FRAME ();
6647 int width
= FRAME_TOTAL_COLS (sf
);
6648 int height
= FRAME_LINES (sf
);
6650 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6652 /* If these sizes are so big they cause overflow, just ignore the
6653 change. It's not clear what better we could do. */
6654 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6655 fatal ("screen size %dx%d too big", width
, height
);
6658 adjust_frame_glyphs_initially ();
6659 calculate_costs (XFRAME (selected_frame
));
6664 #endif /* CANNOT_DUMP */
6665 signal (SIGWINCH
, window_change_signal
);
6666 #endif /* SIGWINCH */
6668 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6672 /* The MSDOS terminal turns on its ``window system'' relatively
6673 late into the startup, so we cannot do the frame faces'
6674 initialization just yet. It will be done later by pc-win.el
6675 and internal_terminal_init. */
6676 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6678 && NILP (Vwindow_system
))
6680 /* For the initial frame, we don't have any way of knowing what
6681 are the foreground and background colors of the terminal. */
6682 struct frame
*sf
= SELECTED_FRAME();
6684 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6685 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6686 call0 (intern ("tty-set-up-initial-frame-faces"));
6692 /***********************************************************************
6694 ***********************************************************************/
6696 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6697 Sinternal_show_cursor
, 2, 2, 0,
6698 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6699 WINDOW nil means use the selected window. SHOW non-nil means
6700 show a cursor in WINDOW in the next redisplay. SHOW nil means
6701 don't show a cursor. */)
6703 Lisp_Object window
, show
;
6705 /* Don't change cursor state while redisplaying. This could confuse
6707 if (!redisplaying_p
)
6710 window
= selected_window
;
6712 CHECK_WINDOW (window
);
6714 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6721 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6722 Sinternal_show_cursor_p
, 0, 1, 0,
6723 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6724 WINDOW nil or omitted means report on the selected window. */)
6731 window
= selected_window
;
6733 CHECK_WINDOW (window
);
6735 w
= XWINDOW (window
);
6736 return w
->cursor_off_p
? Qnil
: Qt
;
6740 /***********************************************************************
6742 ***********************************************************************/
6747 defsubr (&Sredraw_frame
);
6748 defsubr (&Sredraw_display
);
6749 defsubr (&Sframe_or_buffer_changed_p
);
6750 defsubr (&Sopen_termscript
);
6752 defsubr (&Ssit_for
);
6753 defsubr (&Ssleep_for
);
6754 defsubr (&Ssend_string_to_terminal
);
6755 defsubr (&Sinternal_show_cursor
);
6756 defsubr (&Sinternal_show_cursor_p
);
6759 defsubr (&Sdump_redisplay_history
);
6762 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6763 staticpro (&frame_and_buffer_state
);
6765 Qdisplay_table
= intern ("display-table");
6766 staticpro (&Qdisplay_table
);
6767 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6768 staticpro (&Qredisplay_dont_pause
);
6770 DEFVAR_INT ("baud-rate", &baud_rate
,
6771 doc
: /* *The output baud rate of the terminal.
6772 On most systems, changing this value will affect the amount of padding
6773 and the other strategic decisions made during redisplay. */);
6775 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6776 doc
: /* *Non-nil means invert the entire frame display.
6777 This means everything is in inverse video which otherwise would not be. */);
6779 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6780 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6782 See also `ring-bell-function'. */);
6784 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6785 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6786 A non-nil value is useful if the terminal can automatically preserve
6787 Emacs's frame display when you reenter Emacs.
6788 It is up to you to set this variable if your terminal can do that. */);
6790 DEFVAR_LISP ("window-system", &Vwindow_system
,
6791 doc
: /* Name of window system that Emacs is displaying through.
6792 The value is a symbol--for instance, `x' for X windows.
6793 The value is nil if Emacs is using a text-only terminal. */);
6795 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6796 doc
: /* The version number of the window system in use.
6797 For X windows, this is 10 or 11. */);
6799 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6800 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6802 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6803 doc
: /* Table defining how to output a glyph code to the frame.
6804 If not nil, this is a vector indexed by glyph code to define the glyph.
6805 Each element can be:
6806 integer: a glyph code which this glyph is an alias for.
6807 string: output this glyph using that string (not impl. in X windows).
6808 nil: this glyph mod 524288 is the code of a character to output,
6809 and this glyph / 524288 is the face number (see `face-id') to use
6810 while outputting it. */);
6811 Vglyph_table
= Qnil
;
6813 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6814 doc
: /* Display table to use for buffers that specify none.
6815 See `buffer-display-table' for more information. */);
6816 Vstandard_display_table
= Qnil
;
6818 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6819 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6820 redisplay_dont_pause
= 0;
6822 /* Initialize `window-system', unless init_display already decided it. */
6827 Vwindow_system
= Qnil
;
6828 Vwindow_system_version
= Qnil
;
6832 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6833 (do not change this comment) */