1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,2003
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
34 #include "termhooks.h"
35 /* cm.h must come after dispextern.h on Windows. */
36 #include "dispextern.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
51 include the following file. */
52 /* #include "systty.h" */
53 #include "syssignal.h"
57 #endif /* HAVE_X_WINDOWS */
61 #endif /* HAVE_NTGUI */
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
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1520 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1521 || a
->overlapped_p
!= b
->overlapped_p
1522 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1523 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1524 /* Different partially visible characters on left margin. */
1526 /* Different height. */
1527 || a
->ascent
!= b
->ascent
1528 || a
->phys_ascent
!= b
->phys_ascent
1529 || a
->phys_height
!= b
->phys_height
1530 || a
->visible_height
!= b
->visible_height
)
1539 /***********************************************************************
1542 See dispextern.h for an overall explanation of glyph pools.
1543 ***********************************************************************/
1545 /* Allocate a glyph_pool structure. The structure returned is
1546 initialized with zeros. The global variable glyph_pool_count is
1547 incremented for each pool allocated. */
1549 static struct glyph_pool
*
1552 struct glyph_pool
*result
;
1554 /* Allocate a new glyph_pool and clear it. */
1555 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1556 bzero (result
, sizeof *result
);
1558 /* For memory leak and double deletion checking. */
1565 /* Free a glyph_pool structure POOL. The function may be called with
1566 a null POOL pointer. The global variable glyph_pool_count is
1567 decremented with every pool structure freed. If this count gets
1568 negative, more structures were freed than allocated, i.e. one
1569 structure must have been freed more than once or a bogus pointer
1570 was passed to free_glyph_pool. */
1573 free_glyph_pool (pool
)
1574 struct glyph_pool
*pool
;
1578 /* More freed than allocated? */
1580 xassert (glyph_pool_count
>= 0);
1582 xfree (pool
->glyphs
);
1588 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1589 columns we need. This function never shrinks a pool. The only
1590 case in which this would make sense, would be when a frame's size
1591 is changed from a large value to a smaller one. But, if someone
1592 does it once, we can expect that he will do it again.
1594 Value is non-zero if the pool changed in a way which makes
1595 re-adjusting window glyph matrices necessary. */
1598 realloc_glyph_pool (pool
, matrix_dim
)
1599 struct glyph_pool
*pool
;
1600 struct dim matrix_dim
;
1605 changed_p
= (pool
->glyphs
== 0
1606 || matrix_dim
.height
!= pool
->nrows
1607 || matrix_dim
.width
!= pool
->ncolumns
);
1609 /* Enlarge the glyph pool. */
1610 needed
= matrix_dim
.width
* matrix_dim
.height
;
1611 if (needed
> pool
->nglyphs
)
1613 int size
= needed
* sizeof (struct glyph
);
1616 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1619 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1620 bzero (pool
->glyphs
, size
);
1623 pool
->nglyphs
= needed
;
1626 /* Remember the number of rows and columns because (a) we use them
1627 to do sanity checks, and (b) the number of columns determines
1628 where rows in the frame matrix start---this must be available to
1629 determine pointers to rows of window sub-matrices. */
1630 pool
->nrows
= matrix_dim
.height
;
1631 pool
->ncolumns
= matrix_dim
.width
;
1638 /***********************************************************************
1640 ***********************************************************************/
1645 /* Flush standard output. This is sometimes useful to call from
1655 /* Check that no glyph pointers have been lost in MATRIX. If a
1656 pointer has been lost, e.g. by using a structure assignment between
1657 rows, at least one pointer must occur more than once in the rows of
1661 check_matrix_pointer_lossage (matrix
)
1662 struct glyph_matrix
*matrix
;
1666 for (i
= 0; i
< matrix
->nrows
; ++i
)
1667 for (j
= 0; j
< matrix
->nrows
; ++j
)
1669 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1670 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1674 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1677 matrix_row (matrix
, row
)
1678 struct glyph_matrix
*matrix
;
1681 xassert (matrix
&& matrix
->rows
);
1682 xassert (row
>= 0 && row
< matrix
->nrows
);
1684 /* That's really too slow for normal testing because this function
1685 is called almost everywhere. Although---it's still astonishingly
1686 fast, so it is valuable to have for debugging purposes. */
1688 check_matrix_pointer_lossage (matrix
);
1691 return matrix
->rows
+ row
;
1695 #if 0 /* This function makes invalid assumptions when text is
1696 partially invisible. But it might come handy for debugging
1699 /* Check invariants that must hold for an up to date current matrix of
1703 check_matrix_invariants (w
)
1706 struct glyph_matrix
*matrix
= w
->current_matrix
;
1707 int yb
= window_text_bottom_y (w
);
1708 struct glyph_row
*row
= matrix
->rows
;
1709 struct glyph_row
*last_text_row
= NULL
;
1710 struct buffer
*saved
= current_buffer
;
1711 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1714 /* This can sometimes happen for a fresh window. */
1715 if (matrix
->nrows
< 2)
1718 set_buffer_temp (buffer
);
1720 /* Note: last row is always reserved for the mode line. */
1721 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1722 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1724 struct glyph_row
*next
= row
+ 1;
1726 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1727 last_text_row
= row
;
1729 /* Check that character and byte positions are in sync. */
1730 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1731 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1733 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1734 have such a position temporarily in case of a minibuffer
1735 displaying something like `[Sole completion]' at its end. */
1736 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1737 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1738 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1740 /* Check that end position of `row' is equal to start position
1742 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1744 xassert (MATRIX_ROW_END_CHARPOS (row
)
1745 == MATRIX_ROW_START_CHARPOS (next
));
1746 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1747 == MATRIX_ROW_START_BYTEPOS (next
));
1752 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1753 xassert (w
->desired_matrix
->rows
!= NULL
);
1754 set_buffer_temp (saved
);
1759 #endif /* GLYPH_DEBUG != 0 */
1763 /**********************************************************************
1764 Allocating/ Adjusting Glyph Matrices
1765 **********************************************************************/
1767 /* Allocate glyph matrices over a window tree for a frame-based
1770 X and Y are column/row within the frame glyph matrix where
1771 sub-matrices for the window tree rooted at WINDOW must be
1772 allocated. CH_DIM contains the dimensions of the smallest
1773 character that could be used during display. DIM_ONLY_P non-zero
1774 means that the caller of this function is only interested in the
1775 result matrix dimension, and matrix adjustments should not be
1778 The function returns the total width/height of the sub-matrices of
1779 the window tree. If called on a frame root window, the computation
1780 will take the mini-buffer window into account.
1782 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1784 NEW_LEAF_MATRIX set if any window in the tree did not have a
1785 glyph matrices yet, and
1787 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1788 any window in the tree will be changed or have been changed (see
1791 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1794 Windows are arranged into chains of windows on the same level
1795 through the next fields of window structures. Such a level can be
1796 either a sequence of horizontally adjacent windows from left to
1797 right, or a sequence of vertically adjacent windows from top to
1798 bottom. Each window in a horizontal sequence can be either a leaf
1799 window or a vertical sequence; a window in a vertical sequence can
1800 be either a leaf or a horizontal sequence. All windows in a
1801 horizontal sequence have the same height, and all windows in a
1802 vertical sequence have the same width.
1804 This function uses, for historical reasons, a more general
1805 algorithm to determine glyph matrix dimensions that would be
1808 The matrix height of a horizontal sequence is determined by the
1809 maximum height of any matrix in the sequence. The matrix width of
1810 a horizontal sequence is computed by adding up matrix widths of
1811 windows in the sequence.
1813 |<------- result width ------->|
1814 +---------+----------+---------+ ---
1817 +---------+ | | result height
1822 The matrix width of a vertical sequence is the maximum matrix width
1823 of any window in the sequence. Its height is computed by adding up
1824 matrix heights of windows in the sequence.
1826 |<---- result width -->|
1834 +------------+---------+ |
1837 +------------+---------+ --- */
1839 /* Bit indicating that a new matrix will be allocated or has been
1842 #define NEW_LEAF_MATRIX (1 << 0)
1844 /* Bit indicating that a matrix will or has changed its location or
1847 #define CHANGED_LEAF_MATRIX (1 << 1)
1850 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1851 window_change_flags
)
1855 int *window_change_flags
;
1857 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1859 int wmax
= 0, hmax
= 0;
1863 int in_horz_combination_p
;
1865 /* What combination is WINDOW part of? Compute this once since the
1866 result is the same for all windows in the `next' chain. The
1867 special case of a root window (parent equal to nil) is treated
1868 like a vertical combination because a root window's `next'
1869 points to the mini-buffer window, if any, which is arranged
1870 vertically below other windows. */
1871 in_horz_combination_p
1872 = (!NILP (XWINDOW (window
)->parent
)
1873 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1875 /* For WINDOW and all windows on the same level. */
1878 w
= XWINDOW (window
);
1880 /* Get the dimension of the window sub-matrix for W, depending
1881 on whether this is a combination or a leaf window. */
1882 if (!NILP (w
->hchild
))
1883 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1885 window_change_flags
);
1886 else if (!NILP (w
->vchild
))
1887 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1889 window_change_flags
);
1892 /* If not already done, allocate sub-matrix structures. */
1893 if (w
->desired_matrix
== NULL
)
1895 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1896 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1897 *window_change_flags
|= NEW_LEAF_MATRIX
;
1900 /* Width and height MUST be chosen so that there are no
1901 holes in the frame matrix. */
1902 dim
.width
= required_matrix_width (w
);
1903 dim
.height
= required_matrix_height (w
);
1905 /* Will matrix be re-allocated? */
1906 if (x
!= w
->desired_matrix
->matrix_x
1907 || y
!= w
->desired_matrix
->matrix_y
1908 || dim
.width
!= w
->desired_matrix
->matrix_w
1909 || dim
.height
!= w
->desired_matrix
->matrix_h
1910 || (margin_glyphs_to_reserve (w
, dim
.width
,
1911 w
->right_margin_cols
)
1912 != w
->desired_matrix
->left_margin_glyphs
)
1913 || (margin_glyphs_to_reserve (w
, dim
.width
,
1914 w
->left_margin_cols
)
1915 != w
->desired_matrix
->right_margin_glyphs
))
1916 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1918 /* Actually change matrices, if allowed. Do not consider
1919 CHANGED_LEAF_MATRIX computed above here because the pool
1920 may have been changed which we don't now here. We trust
1921 that we only will be called with DIM_ONLY_P != 0 when
1925 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1926 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1930 /* If we are part of a horizontal combination, advance x for
1931 windows to the right of W; otherwise advance y for windows
1933 if (in_horz_combination_p
)
1938 /* Remember maximum glyph matrix dimensions. */
1939 wmax
= max (wmax
, dim
.width
);
1940 hmax
= max (hmax
, dim
.height
);
1942 /* Next window on same level. */
1945 while (!NILP (window
));
1947 /* Set `total' to the total glyph matrix dimension of this window
1948 level. In a vertical combination, the width is the width of the
1949 widest window; the height is the y we finally reached, corrected
1950 by the y we started with. In a horizontal combination, the total
1951 height is the height of the tallest window, and the width is the
1952 x we finally reached, corrected by the x we started with. */
1953 if (in_horz_combination_p
)
1955 total
.width
= x
- x0
;
1956 total
.height
= hmax
;
1961 total
.height
= y
- y0
;
1968 /* Return the required height of glyph matrices for window W. */
1971 required_matrix_height (w
)
1974 #ifdef HAVE_WINDOW_SYSTEM
1975 struct frame
*f
= XFRAME (w
->frame
);
1977 if (FRAME_WINDOW_P (f
))
1979 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1980 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1981 return (((window_pixel_height
+ ch_height
- 1)
1983 /* One partially visible line at the top and
1984 bottom of the window. */
1986 /* 2 for header and mode line. */
1989 #endif /* HAVE_WINDOW_SYSTEM */
1991 return WINDOW_TOTAL_LINES (w
);
1995 /* Return the required width of glyph matrices for window W. */
1998 required_matrix_width (w
)
2001 #ifdef HAVE_WINDOW_SYSTEM
2002 struct frame
*f
= XFRAME (w
->frame
);
2003 if (FRAME_WINDOW_P (f
))
2005 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2006 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2008 /* Compute number of glyphs needed in a glyph row. */
2009 return (((window_pixel_width
+ ch_width
- 1)
2011 /* 2 partially visible columns in the text area. */
2013 /* One partially visible column at the right
2014 edge of each marginal area. */
2017 #endif /* HAVE_WINDOW_SYSTEM */
2019 return XINT (w
->total_cols
);
2023 /* Allocate window matrices for window-based redisplay. W is the
2024 window whose matrices must be allocated/reallocated. CH_DIM is the
2025 size of the smallest character that could potentially be used on W. */
2028 allocate_matrices_for_window_redisplay (w
)
2033 if (!NILP (w
->vchild
))
2034 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2035 else if (!NILP (w
->hchild
))
2036 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2039 /* W is a leaf window. */
2042 /* If matrices are not yet allocated, allocate them now. */
2043 if (w
->desired_matrix
== NULL
)
2045 w
->desired_matrix
= new_glyph_matrix (NULL
);
2046 w
->current_matrix
= new_glyph_matrix (NULL
);
2049 dim
.width
= required_matrix_width (w
);
2050 dim
.height
= required_matrix_height (w
);
2051 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2052 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2055 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2060 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2061 do it for all frames; otherwise do it just for the given frame.
2062 This function must be called when a new frame is created, its size
2063 changes, or its window configuration changes. */
2069 /* Block input so that expose events and other events that access
2070 glyph matrices are not processed while we are changing them. */
2074 adjust_frame_glyphs (f
);
2077 Lisp_Object tail
, lisp_frame
;
2079 FOR_EACH_FRAME (tail
, lisp_frame
)
2080 adjust_frame_glyphs (XFRAME (lisp_frame
));
2087 /* Adjust frame glyphs when Emacs is initialized.
2089 To be called from init_display.
2091 We need a glyph matrix because redraw will happen soon.
2092 Unfortunately, window sizes on selected_frame are not yet set to
2093 meaningful values. I believe we can assume that there are only two
2094 windows on the frame---the mini-buffer and the root window. Frame
2095 height and width seem to be correct so far. So, set the sizes of
2096 windows to estimated values. */
2099 adjust_frame_glyphs_initially ()
2101 struct frame
*sf
= SELECTED_FRAME ();
2102 struct window
*root
= XWINDOW (sf
->root_window
);
2103 struct window
*mini
= XWINDOW (root
->next
);
2104 int frame_lines
= FRAME_LINES (sf
);
2105 int frame_cols
= FRAME_COLS (sf
);
2106 int top_margin
= FRAME_TOP_MARGIN (sf
);
2108 /* Do it for the root window. */
2109 XSETFASTINT (root
->top_line
, top_margin
);
2110 XSETFASTINT (root
->total_cols
, frame_cols
);
2111 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2113 /* Do it for the mini-buffer window. */
2114 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2115 XSETFASTINT (mini
->total_cols
, frame_cols
);
2116 set_window_height (root
->next
, 1, 0);
2118 adjust_frame_glyphs (sf
);
2119 glyphs_initialized_initially_p
= 1;
2123 /* Allocate/reallocate glyph matrices of a single frame F. */
2126 adjust_frame_glyphs (f
)
2129 if (FRAME_WINDOW_P (f
))
2130 adjust_frame_glyphs_for_window_redisplay (f
);
2132 adjust_frame_glyphs_for_frame_redisplay (f
);
2134 /* Don't forget the message buffer and the buffer for
2135 decode_mode_spec. */
2136 adjust_frame_message_buffer (f
);
2137 adjust_decode_mode_spec_buffer (f
);
2139 f
->glyphs_initialized_p
= 1;
2143 /* In the window tree with root W, build current matrices of leaf
2144 windows from the frame's current matrix. */
2147 fake_current_matrices (window
)
2152 for (; !NILP (window
); window
= w
->next
)
2154 w
= XWINDOW (window
);
2156 if (!NILP (w
->hchild
))
2157 fake_current_matrices (w
->hchild
);
2158 else if (!NILP (w
->vchild
))
2159 fake_current_matrices (w
->vchild
);
2163 struct frame
*f
= XFRAME (w
->frame
);
2164 struct glyph_matrix
*m
= w
->current_matrix
;
2165 struct glyph_matrix
*fm
= f
->current_matrix
;
2167 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2168 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2170 for (i
= 0; i
< m
->matrix_h
; ++i
)
2172 struct glyph_row
*r
= m
->rows
+ i
;
2173 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2175 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2176 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2178 r
->enabled_p
= fr
->enabled_p
;
2181 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2182 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2183 r
->used
[TEXT_AREA
] = (m
->matrix_w
2184 - r
->used
[LEFT_MARGIN_AREA
]
2185 - r
->used
[RIGHT_MARGIN_AREA
]);
2194 /* Save away the contents of frame F's current frame matrix. Value is
2195 a glyph matrix holding the contents of F's current frame matrix. */
2197 static struct glyph_matrix
*
2198 save_current_matrix (f
)
2202 struct glyph_matrix
*saved
;
2204 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2205 bzero (saved
, sizeof *saved
);
2206 saved
->nrows
= f
->current_matrix
->nrows
;
2207 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2208 * sizeof *saved
->rows
);
2209 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2211 for (i
= 0; i
< saved
->nrows
; ++i
)
2213 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2214 struct glyph_row
*to
= saved
->rows
+ i
;
2215 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2216 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2217 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2218 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2225 /* Restore the contents of frame F's current frame matrix from SAVED,
2226 and free memory associated with SAVED. */
2229 restore_current_matrix (f
, saved
)
2231 struct glyph_matrix
*saved
;
2235 for (i
= 0; i
< saved
->nrows
; ++i
)
2237 struct glyph_row
*from
= saved
->rows
+ i
;
2238 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2239 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2240 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2241 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2242 xfree (from
->glyphs
[TEXT_AREA
]);
2245 xfree (saved
->rows
);
2251 /* Allocate/reallocate glyph matrices of a single frame F for
2252 frame-based redisplay. */
2255 adjust_frame_glyphs_for_frame_redisplay (f
)
2259 struct dim matrix_dim
;
2261 int window_change_flags
;
2264 if (!FRAME_LIVE_P (f
))
2267 /* Determine the smallest character in any font for F. On
2268 console windows, all characters have dimension (1, 1). */
2269 ch_dim
.width
= ch_dim
.height
= 1;
2271 top_window_y
= FRAME_TOP_MARGIN (f
);
2273 /* Allocate glyph pool structures if not already done. */
2274 if (f
->desired_pool
== NULL
)
2276 f
->desired_pool
= new_glyph_pool ();
2277 f
->current_pool
= new_glyph_pool ();
2280 /* Allocate frames matrix structures if needed. */
2281 if (f
->desired_matrix
== NULL
)
2283 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2284 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2287 /* Compute window glyph matrices. (This takes the mini-buffer
2288 window into account). The result is the size of the frame glyph
2289 matrix needed. The variable window_change_flags is set to a bit
2290 mask indicating whether new matrices will be allocated or
2291 existing matrices change their size or location within the frame
2293 window_change_flags
= 0;
2295 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2298 &window_change_flags
);
2300 /* Add in menu bar lines, if any. */
2301 matrix_dim
.height
+= top_window_y
;
2303 /* Enlarge pools as necessary. */
2304 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2305 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2307 /* Set up glyph pointers within window matrices. Do this only if
2308 absolutely necessary since it requires a frame redraw. */
2309 if (pool_changed_p
|| window_change_flags
)
2311 /* Do it for window matrices. */
2312 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2314 &window_change_flags
);
2316 /* Size of frame matrices must equal size of frame. Note
2317 that we are called for X frames with window widths NOT equal
2318 to the frame width (from CHANGE_FRAME_SIZE_1). */
2319 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2320 && matrix_dim
.height
== FRAME_LINES (f
));
2322 /* Pointers to glyph memory in glyph rows are exchanged during
2323 the update phase of redisplay, which means in general that a
2324 frame's current matrix consists of pointers into both the
2325 desired and current glyph pool of the frame. Adjusting a
2326 matrix sets the frame matrix up so that pointers are all into
2327 the same pool. If we want to preserve glyph contents of the
2328 current matrix over a call to adjust_glyph_matrix, we must
2329 make a copy of the current glyphs, and restore the current
2330 matrix' contents from that copy. */
2331 if (display_completed
2332 && !FRAME_GARBAGED_P (f
)
2333 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2334 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2336 struct glyph_matrix
*copy
= save_current_matrix (f
);
2337 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2338 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2339 restore_current_matrix (f
, copy
);
2340 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2344 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2345 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2346 SET_FRAME_GARBAGED (f
);
2352 /* Allocate/reallocate glyph matrices of a single frame F for
2353 window-based redisplay. */
2356 adjust_frame_glyphs_for_window_redisplay (f
)
2362 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2364 /* Get minimum sizes. */
2365 #ifdef HAVE_WINDOW_SYSTEM
2366 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2367 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2369 ch_dim
.width
= ch_dim
.height
= 1;
2372 /* Allocate/reallocate window matrices. */
2373 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2375 /* Allocate/ reallocate matrices of the dummy window used to display
2376 the menu bar under X when no X toolkit support is available. */
2377 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2379 /* Allocate a dummy window if not already done. */
2380 if (NILP (f
->menu_bar_window
))
2382 f
->menu_bar_window
= make_window ();
2383 w
= XWINDOW (f
->menu_bar_window
);
2384 XSETFRAME (w
->frame
, f
);
2385 w
->pseudo_window_p
= 1;
2388 w
= XWINDOW (f
->menu_bar_window
);
2390 /* Set window dimensions to frame dimensions and allocate or
2391 adjust glyph matrices of W. */
2392 XSETFASTINT (w
->top_line
, 0);
2393 XSETFASTINT (w
->left_col
, 0);
2394 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2395 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2396 allocate_matrices_for_window_redisplay (w
);
2398 #endif /* not USE_X_TOOLKIT */
2401 /* Allocate/ reallocate matrices of the tool bar window. If we
2402 don't have a tool bar window yet, make one. */
2403 if (NILP (f
->tool_bar_window
))
2405 f
->tool_bar_window
= make_window ();
2406 w
= XWINDOW (f
->tool_bar_window
);
2407 XSETFRAME (w
->frame
, f
);
2408 w
->pseudo_window_p
= 1;
2411 w
= XWINDOW (f
->tool_bar_window
);
2413 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2414 XSETFASTINT (w
->left_col
, 0);
2415 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2416 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2417 allocate_matrices_for_window_redisplay (w
);
2422 /* Adjust/ allocate message buffer of frame F.
2424 Note that the message buffer is never freed. Since I could not
2425 find a free in 19.34, I assume that freeing it would be
2426 problematic in some way and don't do it either.
2428 (Implementation note: It should be checked if we can free it
2429 eventually without causing trouble). */
2432 adjust_frame_message_buffer (f
)
2435 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2437 if (FRAME_MESSAGE_BUF (f
))
2439 char *buffer
= FRAME_MESSAGE_BUF (f
);
2440 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2441 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2444 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2448 /* Re-allocate buffer for decode_mode_spec on frame F. */
2451 adjust_decode_mode_spec_buffer (f
)
2454 f
->decode_mode_spec_buffer
2455 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2456 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2461 /**********************************************************************
2462 Freeing Glyph Matrices
2463 **********************************************************************/
2465 /* Free glyph memory for a frame F. F may be null. This function can
2466 be called for the same frame more than once. The root window of
2467 F may be nil when this function is called. This is the case when
2468 the function is called when F is destroyed. */
2474 if (f
&& f
->glyphs_initialized_p
)
2476 /* Block interrupt input so that we don't get surprised by an X
2477 event while we're in an inconsistent state. */
2479 f
->glyphs_initialized_p
= 0;
2481 /* Release window sub-matrices. */
2482 if (!NILP (f
->root_window
))
2483 free_window_matrices (XWINDOW (f
->root_window
));
2485 /* Free the dummy window for menu bars without X toolkit and its
2487 if (!NILP (f
->menu_bar_window
))
2489 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2490 free_glyph_matrix (w
->desired_matrix
);
2491 free_glyph_matrix (w
->current_matrix
);
2492 w
->desired_matrix
= w
->current_matrix
= NULL
;
2493 f
->menu_bar_window
= Qnil
;
2496 /* Free the tool bar window and its glyph matrices. */
2497 if (!NILP (f
->tool_bar_window
))
2499 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2500 free_glyph_matrix (w
->desired_matrix
);
2501 free_glyph_matrix (w
->current_matrix
);
2502 w
->desired_matrix
= w
->current_matrix
= NULL
;
2503 f
->tool_bar_window
= Qnil
;
2506 /* Release frame glyph matrices. Reset fields to zero in
2507 case we are called a second time. */
2508 if (f
->desired_matrix
)
2510 free_glyph_matrix (f
->desired_matrix
);
2511 free_glyph_matrix (f
->current_matrix
);
2512 f
->desired_matrix
= f
->current_matrix
= NULL
;
2515 /* Release glyph pools. */
2516 if (f
->desired_pool
)
2518 free_glyph_pool (f
->desired_pool
);
2519 free_glyph_pool (f
->current_pool
);
2520 f
->desired_pool
= f
->current_pool
= NULL
;
2528 /* Free glyph sub-matrices in the window tree rooted at W. This
2529 function may be called with a null pointer, and it may be called on
2530 the same tree more than once. */
2533 free_window_matrices (w
)
2538 if (!NILP (w
->hchild
))
2539 free_window_matrices (XWINDOW (w
->hchild
));
2540 else if (!NILP (w
->vchild
))
2541 free_window_matrices (XWINDOW (w
->vchild
));
2544 /* This is a leaf window. Free its memory and reset fields
2545 to zero in case this function is called a second time for
2547 free_glyph_matrix (w
->current_matrix
);
2548 free_glyph_matrix (w
->desired_matrix
);
2549 w
->current_matrix
= w
->desired_matrix
= NULL
;
2552 /* Next window on same level. */
2553 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2558 /* Check glyph memory leaks. This function is called from
2559 shut_down_emacs. Note that frames are not destroyed when Emacs
2560 exits. We therefore free all glyph memory for all active frames
2561 explicitly and check that nothing is left allocated. */
2564 check_glyph_memory ()
2566 Lisp_Object tail
, frame
;
2568 /* Free glyph memory for all frames. */
2569 FOR_EACH_FRAME (tail
, frame
)
2570 free_glyphs (XFRAME (frame
));
2572 /* Check that nothing is left allocated. */
2573 if (glyph_matrix_count
)
2575 if (glyph_pool_count
)
2581 /**********************************************************************
2582 Building a Frame Matrix
2583 **********************************************************************/
2585 /* Most of the redisplay code works on glyph matrices attached to
2586 windows. This is a good solution most of the time, but it is not
2587 suitable for terminal code. Terminal output functions cannot rely
2588 on being able to set an arbitrary terminal window. Instead they
2589 must be provided with a view of the whole frame, i.e. the whole
2590 screen. We build such a view by constructing a frame matrix from
2591 window matrices in this section.
2593 Windows that must be updated have their must_be_update_p flag set.
2594 For all such windows, their desired matrix is made part of the
2595 desired frame matrix. For other windows, their current matrix is
2596 made part of the desired frame matrix.
2598 +-----------------+----------------+
2599 | desired | desired |
2601 +-----------------+----------------+
2604 +----------------------------------+
2606 Desired window matrices can be made part of the frame matrix in a
2607 cheap way: We exploit the fact that the desired frame matrix and
2608 desired window matrices share their glyph memory. This is not
2609 possible for current window matrices. Their glyphs are copied to
2610 the desired frame matrix. The latter is equivalent to
2611 preserve_other_columns in the old redisplay.
2613 Used glyphs counters for frame matrix rows are the result of adding
2614 up glyph lengths of the window matrices. A line in the frame
2615 matrix is enabled, if a corresponding line in a window matrix is
2618 After building the desired frame matrix, it will be passed to
2619 terminal code, which will manipulate both the desired and current
2620 frame matrix. Changes applied to the frame's current matrix have
2621 to be visible in current window matrices afterwards, of course.
2623 This problem is solved like this:
2625 1. Window and frame matrices share glyphs. Window matrices are
2626 constructed in a way that their glyph contents ARE the glyph
2627 contents needed in a frame matrix. Thus, any modification of
2628 glyphs done in terminal code will be reflected in window matrices
2631 2. Exchanges of rows in a frame matrix done by terminal code are
2632 intercepted by hook functions so that corresponding row operations
2633 on window matrices can be performed. This is necessary because we
2634 use pointers to glyphs in glyph row structures. To satisfy the
2635 assumption of point 1 above that glyphs are updated implicitly in
2636 window matrices when they are manipulated via the frame matrix,
2637 window and frame matrix must of course agree where to find the
2638 glyphs for their rows. Possible manipulations that must be
2639 mirrored are assignments of rows of the desired frame matrix to the
2640 current frame matrix and scrolling the current frame matrix. */
2642 /* Build frame F's desired matrix from window matrices. Only windows
2643 which have the flag must_be_updated_p set have to be updated. Menu
2644 bar lines of a frame are not covered by window matrices, so make
2645 sure not to touch them in this function. */
2648 build_frame_matrix (f
)
2653 /* F must have a frame matrix when this function is called. */
2654 xassert (!FRAME_WINDOW_P (f
));
2656 /* Clear all rows in the frame matrix covered by window matrices.
2657 Menu bar lines are not covered by windows. */
2658 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2659 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2661 /* Build the matrix by walking the window tree. */
2662 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2663 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2667 /* Walk a window tree, building a frame matrix MATRIX from window
2668 matrices. W is the root of a window tree. */
2671 build_frame_matrix_from_window_tree (matrix
, w
)
2672 struct glyph_matrix
*matrix
;
2677 if (!NILP (w
->hchild
))
2678 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2679 else if (!NILP (w
->vchild
))
2680 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2682 build_frame_matrix_from_leaf_window (matrix
, w
);
2684 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2689 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2690 desired frame matrix built. W is a leaf window whose desired or
2691 current matrix is to be added to FRAME_MATRIX. W's flag
2692 must_be_updated_p determines which matrix it contributes to
2693 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2694 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2695 Adding a desired matrix means setting up used counters and such in
2696 frame rows, while adding a current window matrix to FRAME_MATRIX
2697 means copying glyphs. The latter case corresponds to
2698 preserve_other_columns in the old redisplay. */
2701 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2702 struct glyph_matrix
*frame_matrix
;
2705 struct glyph_matrix
*window_matrix
;
2706 int window_y
, frame_y
;
2707 /* If non-zero, a glyph to insert at the right border of W. */
2708 GLYPH right_border_glyph
= 0;
2710 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2711 if (w
->must_be_updated_p
)
2713 window_matrix
= w
->desired_matrix
;
2715 /* Decide whether we want to add a vertical border glyph. */
2716 if (!WINDOW_RIGHTMOST_P (w
))
2718 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2719 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2720 ? XINT (DISP_BORDER_GLYPH (dp
))
2725 window_matrix
= w
->current_matrix
;
2727 /* For all rows in the window matrix and corresponding rows in the
2730 frame_y
= window_matrix
->matrix_y
;
2731 while (window_y
< window_matrix
->nrows
)
2733 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2734 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2735 int current_row_p
= window_matrix
== w
->current_matrix
;
2737 /* Fill up the frame row with spaces up to the left margin of the
2739 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2741 /* Fill up areas in the window matrix row with spaces. */
2742 fill_up_glyph_row_with_spaces (window_row
);
2744 /* If only part of W's desired matrix has been built, and
2745 window_row wasn't displayed, use the corresponding current
2747 if (window_matrix
== w
->desired_matrix
2748 && !window_row
->enabled_p
)
2750 window_row
= w
->current_matrix
->rows
+ window_y
;
2756 /* Copy window row to frame row. */
2757 bcopy (window_row
->glyphs
[0],
2758 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2759 window_matrix
->matrix_w
* sizeof (struct glyph
));
2763 xassert (window_row
->enabled_p
);
2765 /* Only when a desired row has been displayed, we want
2766 the corresponding frame row to be updated. */
2767 frame_row
->enabled_p
= 1;
2769 /* Maybe insert a vertical border between horizontally adjacent
2771 if (right_border_glyph
)
2773 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2774 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2777 /* Window row window_y must be a slice of frame row
2779 xassert (glyph_row_slice_p (window_row
, frame_row
));
2781 /* If rows are in sync, we don't have to copy glyphs because
2782 frame and window share glyphs. */
2785 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2786 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2790 /* Set number of used glyphs in the frame matrix. Since we fill
2791 up with spaces, and visit leaf windows from left to right it
2792 can be done simply. */
2793 frame_row
->used
[TEXT_AREA
]
2794 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2803 /* Add spaces to a glyph row ROW in a window matrix.
2805 Each row has the form:
2807 +---------+-----------------------------+------------+
2808 | left | text | right |
2809 +---------+-----------------------------+------------+
2811 Left and right marginal areas are optional. This function adds
2812 spaces to areas so that there are no empty holes between areas.
2813 In other words: If the right area is not empty, the text area
2814 is filled up with spaces up to the right area. If the text area
2815 is not empty, the left area is filled up.
2817 To be called for frame-based redisplay, only. */
2820 fill_up_glyph_row_with_spaces (row
)
2821 struct glyph_row
*row
;
2823 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2824 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2825 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2829 /* Fill area AREA of glyph row ROW with spaces. To be called for
2830 frame-based redisplay only. */
2833 fill_up_glyph_row_area_with_spaces (row
, area
)
2834 struct glyph_row
*row
;
2837 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2839 struct glyph
*end
= row
->glyphs
[area
+ 1];
2840 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2843 *text
++ = space_glyph
;
2844 row
->used
[area
] = text
- row
->glyphs
[area
];
2849 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2850 reached. In frame matrices only one area, TEXT_AREA, is used. */
2853 fill_up_frame_row_with_spaces (row
, upto
)
2854 struct glyph_row
*row
;
2857 int i
= row
->used
[TEXT_AREA
];
2858 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2861 glyph
[i
++] = space_glyph
;
2863 row
->used
[TEXT_AREA
] = i
;
2868 /**********************************************************************
2869 Mirroring operations on frame matrices in window matrices
2870 **********************************************************************/
2872 /* Set frame being updated via frame-based redisplay to F. This
2873 function must be called before updates to make explicit that we are
2874 working on frame matrices or not. */
2877 set_frame_matrix_frame (f
)
2880 frame_matrix_frame
= f
;
2884 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2885 DESIRED_MATRIX is the desired matrix corresponding to
2886 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2887 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2888 frame_matrix_frame is non-null, this indicates that the exchange is
2889 done in frame matrices, and that we have to perform analogous
2890 operations in window matrices of frame_matrix_frame. */
2893 make_current (desired_matrix
, current_matrix
, row
)
2894 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2897 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2898 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2899 int mouse_face_p
= current_row
->mouse_face_p
;
2901 /* Do current_row = desired_row. This exchanges glyph pointers
2902 between both rows, and does a structure assignment otherwise. */
2903 assign_row (current_row
, desired_row
);
2905 /* Enable current_row to mark it as valid. */
2906 current_row
->enabled_p
= 1;
2907 current_row
->mouse_face_p
= mouse_face_p
;
2909 /* If we are called on frame matrices, perform analogous operations
2910 for window matrices. */
2911 if (frame_matrix_frame
)
2912 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2916 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2917 W's frame which has been made current (by swapping pointers between
2918 current and desired matrix). Perform analogous operations in the
2919 matrices of leaf windows in the window tree rooted at W. */
2922 mirror_make_current (w
, frame_row
)
2928 if (!NILP (w
->hchild
))
2929 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2930 else if (!NILP (w
->vchild
))
2931 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2934 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2935 here because the checks performed in debug mode there
2936 will not allow the conversion. */
2937 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2939 /* If FRAME_ROW is within W, assign the desired row to the
2940 current row (exchanging glyph pointers). */
2941 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2943 struct glyph_row
*current_row
2944 = MATRIX_ROW (w
->current_matrix
, row
);
2945 struct glyph_row
*desired_row
2946 = MATRIX_ROW (w
->desired_matrix
, row
);
2948 if (desired_row
->enabled_p
)
2949 assign_row (current_row
, desired_row
);
2951 swap_glyph_pointers (desired_row
, current_row
);
2952 current_row
->enabled_p
= 1;
2956 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2961 /* Perform row dance after scrolling. We are working on the range of
2962 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2963 including) in MATRIX. COPY_FROM is a vector containing, for each
2964 row I in the range 0 <= I < NLINES, the index of the original line
2965 to move to I. This index is relative to the row range, i.e. 0 <=
2966 index < NLINES. RETAINED_P is a vector containing zero for each
2967 row 0 <= I < NLINES which is empty.
2969 This function is called from do_scrolling and do_direct_scrolling. */
2972 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2974 struct glyph_matrix
*matrix
;
2975 int unchanged_at_top
, nlines
;
2979 /* A copy of original rows. */
2980 struct glyph_row
*old_rows
;
2982 /* Rows to assign to. */
2983 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2987 /* Make a copy of the original rows. */
2988 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2989 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2991 /* Assign new rows, maybe clear lines. */
2992 for (i
= 0; i
< nlines
; ++i
)
2994 int enabled_before_p
= new_rows
[i
].enabled_p
;
2996 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2997 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2998 new_rows
[i
] = old_rows
[copy_from
[i
]];
2999 new_rows
[i
].enabled_p
= enabled_before_p
;
3001 /* RETAINED_P is zero for empty lines. */
3002 if (!retained_p
[copy_from
[i
]])
3003 new_rows
[i
].enabled_p
= 0;
3006 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3007 if (frame_matrix_frame
)
3008 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3009 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3013 /* Synchronize glyph pointers in the current matrix of window W with
3014 the current frame matrix. */
3017 sync_window_with_frame_matrix_rows (w
)
3020 struct frame
*f
= XFRAME (w
->frame
);
3021 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3022 int left
, right
, x
, width
;
3024 /* Preconditions: W must be a leaf window on a tty frame. */
3025 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3026 xassert (!FRAME_WINDOW_P (f
));
3028 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3029 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3030 x
= w
->current_matrix
->matrix_x
;
3031 width
= w
->current_matrix
->matrix_w
;
3033 window_row
= w
->current_matrix
->rows
;
3034 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3035 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3037 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3039 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3040 = frame_row
->glyphs
[0] + x
;
3041 window_row
->glyphs
[TEXT_AREA
]
3042 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3043 window_row
->glyphs
[LAST_AREA
]
3044 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3045 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3046 = window_row
->glyphs
[LAST_AREA
] - right
;
3051 /* Return the window in the window tree rooted in W containing frame
3052 row ROW. Value is null if none is found. */
3055 frame_row_to_window (w
, row
)
3059 struct window
*found
= NULL
;
3063 if (!NILP (w
->hchild
))
3064 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3065 else if (!NILP (w
->vchild
))
3066 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3067 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3068 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3071 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3078 /* Perform a line dance in the window tree rooted at W, after
3079 scrolling a frame matrix in mirrored_line_dance.
3081 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3082 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3083 COPY_FROM is a vector containing, for each row I in the range 0 <=
3084 I < NLINES, the index of the original line to move to I. This
3085 index is relative to the row range, i.e. 0 <= index < NLINES.
3086 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3090 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3092 int unchanged_at_top
, nlines
;
3098 if (!NILP (w
->hchild
))
3099 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3100 nlines
, copy_from
, retained_p
);
3101 else if (!NILP (w
->vchild
))
3102 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3103 nlines
, copy_from
, retained_p
);
3106 /* W is a leaf window, and we are working on its current
3108 struct glyph_matrix
*m
= w
->current_matrix
;
3110 struct glyph_row
*old_rows
;
3112 /* Make a copy of the original rows of matrix m. */
3113 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3114 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3116 for (i
= 0; i
< nlines
; ++i
)
3118 /* Frame relative line assigned to. */
3119 int frame_to
= i
+ unchanged_at_top
;
3121 /* Frame relative line assigned. */
3122 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3124 /* Window relative line assigned to. */
3125 int window_to
= frame_to
- m
->matrix_y
;
3127 /* Window relative line assigned. */
3128 int window_from
= frame_from
- m
->matrix_y
;
3130 /* Is assigned line inside window? */
3131 int from_inside_window_p
3132 = window_from
>= 0 && window_from
< m
->matrix_h
;
3134 /* Is assigned to line inside window? */
3135 int to_inside_window_p
3136 = window_to
>= 0 && window_to
< m
->matrix_h
;
3138 if (from_inside_window_p
&& to_inside_window_p
)
3140 /* Enabled setting before assignment. */
3141 int enabled_before_p
;
3143 /* Do the assignment. The enabled_p flag is saved
3144 over the assignment because the old redisplay did
3146 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3147 m
->rows
[window_to
] = old_rows
[window_from
];
3148 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3150 /* If frame line is empty, window line is empty, too. */
3151 if (!retained_p
[copy_from
[i
]])
3152 m
->rows
[window_to
].enabled_p
= 0;
3154 else if (to_inside_window_p
)
3156 /* A copy between windows. This is an infrequent
3157 case not worth optimizing. */
3158 struct frame
*f
= XFRAME (w
->frame
);
3159 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3161 struct glyph_matrix
*m2
;
3164 w2
= frame_row_to_window (root
, frame_to
);
3165 m2
= w2
->current_matrix
;
3166 m2_from
= frame_from
- m2
->matrix_y
;
3167 copy_row_except_pointers (m
->rows
+ window_to
,
3168 m2
->rows
+ m2_from
);
3170 /* If frame line is empty, window line is empty, too. */
3171 if (!retained_p
[copy_from
[i
]])
3172 m
->rows
[window_to
].enabled_p
= 0;
3175 else if (from_inside_window_p
)
3179 /* If there was a copy between windows, make sure glyph
3180 pointers are in sync with the frame matrix. */
3182 sync_window_with_frame_matrix_rows (w
);
3184 /* Check that no pointers are lost. */
3188 /* Next window on same level. */
3189 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3196 /* Check that window and frame matrices agree about their
3197 understanding where glyphs of the rows are to find. For each
3198 window in the window tree rooted at W, check that rows in the
3199 matrices of leaf window agree with their frame matrices about
3203 check_window_matrix_pointers (w
)
3208 if (!NILP (w
->hchild
))
3209 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3210 else if (!NILP (w
->vchild
))
3211 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3214 struct frame
*f
= XFRAME (w
->frame
);
3215 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3216 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3219 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3224 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3225 a window and FRAME_MATRIX is the corresponding frame matrix. For
3226 each row in WINDOW_MATRIX check that it's a slice of the
3227 corresponding frame row. If it isn't, abort. */
3230 check_matrix_pointers (window_matrix
, frame_matrix
)
3231 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3233 /* Row number in WINDOW_MATRIX. */
3236 /* Row number corresponding to I in FRAME_MATRIX. */
3237 int j
= window_matrix
->matrix_y
;
3239 /* For all rows check that the row in the window matrix is a
3240 slice of the row in the frame matrix. If it isn't we didn't
3241 mirror an operation on the frame matrix correctly. */
3242 while (i
< window_matrix
->nrows
)
3244 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3245 frame_matrix
->rows
+ j
))
3251 #endif /* GLYPH_DEBUG != 0 */
3255 /**********************************************************************
3256 VPOS and HPOS translations
3257 **********************************************************************/
3261 /* Translate vertical position VPOS which is relative to window W to a
3262 vertical position relative to W's frame. */
3265 window_to_frame_vpos (w
, vpos
)
3269 struct frame
*f
= XFRAME (w
->frame
);
3271 xassert (!FRAME_WINDOW_P (f
));
3272 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3273 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3274 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3279 /* Translate horizontal position HPOS which is relative to window W to
3280 a horizontal position relative to W's frame. */
3283 window_to_frame_hpos (w
, hpos
)
3287 struct frame
*f
= XFRAME (w
->frame
);
3289 xassert (!FRAME_WINDOW_P (f
));
3290 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3294 #endif /* GLYPH_DEBUG */
3298 /**********************************************************************
3300 **********************************************************************/
3302 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3303 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3309 CHECK_LIVE_FRAME (frame
);
3312 /* Ignore redraw requests, if frame has no glyphs yet.
3313 (Implementation note: It still has to be checked why we are
3314 called so early here). */
3315 if (!glyphs_initialized_initially_p
)
3319 if (FRAME_MSDOS_P (f
))
3320 set_terminal_modes ();
3322 clear_current_matrices (f
);
3325 windows_or_buffers_changed
++;
3326 /* Mark all windows as inaccurate, so that every window will have
3327 its redisplay done. */
3328 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3329 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3335 /* Redraw frame F. This is nothing more than a call to the Lisp
3336 function redraw-frame. */
3343 XSETFRAME (frame
, f
);
3344 Fredraw_frame (frame
);
3348 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3349 doc
: /* Clear and redisplay all visible frames. */)
3352 Lisp_Object tail
, frame
;
3354 FOR_EACH_FRAME (tail
, frame
)
3355 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3356 Fredraw_frame (frame
);
3362 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3363 visible frames marked as garbaged. */
3366 redraw_garbaged_frames ()
3368 Lisp_Object tail
, frame
;
3370 FOR_EACH_FRAME (tail
, frame
)
3371 if (FRAME_VISIBLE_P (XFRAME (frame
))
3372 && FRAME_GARBAGED_P (XFRAME (frame
)))
3373 Fredraw_frame (frame
);
3378 /***********************************************************************
3380 ***********************************************************************/
3382 /* Try to update display and current glyph matrix directly.
3384 This function is called after a character G has been inserted into
3385 current_buffer. It tries to update the current glyph matrix and
3386 perform appropriate screen output to reflect the insertion. If it
3387 succeeds, the global flag redisplay_performed_directly_p will be
3388 set to 1, and thereby prevent the more costly general redisplay
3389 from running (see redisplay_internal).
3391 This function is not called for `hairy' character insertions.
3392 In particular, it is not called when after or before change
3393 functions exist, like they are used by font-lock. See keyboard.c
3394 for details where this function is called. */
3397 direct_output_for_insert (g
)
3400 register struct frame
*f
= SELECTED_FRAME ();
3401 struct window
*w
= XWINDOW (selected_window
);
3403 struct glyph_row
*glyph_row
;
3404 struct glyph
*glyphs
, *glyph
, *end
;
3406 /* Non-null means that redisplay of W is based on window matrices. */
3407 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3408 /* Non-null means we are in overwrite mode. */
3409 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3411 struct text_pos pos
;
3412 int delta
, delta_bytes
;
3414 /* Not done directly. */
3415 redisplay_performed_directly_p
= 0;
3417 /* Quickly give up for some common cases. */
3418 if (cursor_in_echo_area
3419 /* Give up if fonts have changed. */
3421 /* Give up if face attributes have been changed. */
3422 || face_change_count
3423 /* Give up if cursor position not really known. */
3424 || !display_completed
3425 /* Give up if buffer appears in two places. */
3426 || buffer_shared
> 1
3427 /* Give up if currently displaying a message instead of the
3428 minibuffer contents. */
3429 || (EQ (selected_window
, minibuf_window
)
3430 && EQ (minibuf_window
, echo_area_window
))
3431 /* Give up for hscrolled mini-buffer because display of the prompt
3432 is handled specially there (see display_line). */
3433 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3434 /* Give up if overwriting in the middle of a line. */
3437 && FETCH_BYTE (PT
) != '\n')
3438 /* Give up for tabs and line ends. */
3442 /* Give up if unable to display the cursor in the window. */
3443 || w
->cursor
.vpos
< 0
3444 /* Give up if we are showing a message or just cleared the message
3445 because we might need to resize the echo area window. */
3446 || !NILP (echo_area_buffer
[0])
3447 || !NILP (echo_area_buffer
[1])
3448 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3449 /* Can't do it in a continued line because continuation
3450 lines would change. */
3451 (glyph_row
->continued_p
3452 || glyph_row
->exact_window_width_line_p
3453 /* Can't use this method if the line overlaps others or is
3454 overlapped by others because these other lines would
3455 have to be redisplayed. */
3456 || glyph_row
->overlapping_p
3457 || glyph_row
->overlapped_p
))
3458 /* Can't do it for partial width windows on terminal frames
3459 because we can't clear to eol in such a window. */
3460 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3463 /* If we can't insert glyphs, we can use this method only
3464 at the end of a line. */
3465 if (!char_ins_del_ok
)
3466 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3469 /* Set up a display iterator structure for W. Glyphs will be
3470 produced in scratch_glyph_row. Current position is W's cursor
3472 clear_glyph_row (&scratch_glyph_row
);
3473 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3474 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3475 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3478 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3479 if (glyph_row
->mouse_face_p
)
3482 /* Give up if highlighting trailing whitespace and we have trailing
3483 whitespace in glyph_row. We would have to remove the trailing
3484 whitespace face in that case. */
3485 if (!NILP (Vshow_trailing_whitespace
)
3486 && glyph_row
->used
[TEXT_AREA
])
3490 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3491 if (last
->type
== STRETCH_GLYPH
3492 || (last
->type
== CHAR_GLYPH
3493 && last
->u
.ch
== ' '))
3497 /* Give up if there are overlay strings at pos. This would fail
3498 if the overlay string has newlines in it. */
3499 if (STRINGP (it
.string
))
3502 it
.hpos
= w
->cursor
.hpos
;
3503 it
.vpos
= w
->cursor
.vpos
;
3504 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3505 it
.current_y
= w
->cursor
.y
;
3506 it
.end_charpos
= PT
;
3507 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3508 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3510 /* More than one display element may be returned for PT - 1 if
3511 (i) it's a control character which is translated into `\003' or
3512 `^C', or (ii) it has a display table entry, or (iii) it's a
3513 combination of both. */
3514 delta
= delta_bytes
= 0;
3515 while (get_next_display_element (&it
))
3517 PRODUCE_GLYPHS (&it
);
3519 /* Give up if glyph doesn't fit completely on the line. */
3520 if (it
.current_x
>= it
.last_visible_x
)
3523 /* Give up if new glyph has different ascent or descent than
3524 the original row, or if it is not a character glyph. */
3525 if (glyph_row
->ascent
!= it
.ascent
3526 || glyph_row
->height
!= it
.ascent
+ it
.descent
3527 || glyph_row
->phys_ascent
!= it
.phys_ascent
3528 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3529 || it
.what
!= IT_CHARACTER
)
3533 delta_bytes
+= it
.len
;
3534 set_iterator_to_next (&it
, 1);
3537 /* Give up if we hit the right edge of the window. We would have
3538 to insert truncation or continuation glyphs. */
3539 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3540 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3543 /* Give up if there is a \t following in the line. */
3545 it2
.end_charpos
= ZV
;
3546 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3547 while (get_next_display_element (&it2
)
3548 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3552 set_iterator_to_next (&it2
, 1);
3555 /* Number of new glyphs produced. */
3556 n
= it
.glyph_row
->used
[TEXT_AREA
];
3558 /* Start and end of glyphs in original row. */
3559 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3560 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3562 /* Make room for new glyphs, then insert them. */
3563 xassert (end
- glyphs
- n
>= 0);
3564 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3565 (end
- glyphs
- n
) * sizeof (*end
));
3566 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3567 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3568 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3570 /* Compute new line width. */
3571 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3572 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3573 glyph_row
->pixel_width
= glyph_row
->x
;
3576 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3580 /* Increment buffer positions for glyphs following the newly
3582 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3583 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3584 glyph
->charpos
+= delta
;
3586 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3588 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3589 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3592 /* Adjust positions in lines following the one we are in. */
3593 increment_matrix_positions (w
->current_matrix
,
3595 w
->current_matrix
->nrows
,
3596 delta
, delta_bytes
);
3598 glyph_row
->contains_overlapping_glyphs_p
3599 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3601 glyph_row
->displays_text_p
= 1;
3602 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3603 XFASTINT (w
->window_end_vpos
)));
3605 if (!NILP (Vshow_trailing_whitespace
))
3606 highlight_trailing_whitespace (it
.f
, glyph_row
);
3608 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3609 In the middle, we have to insert glyphs. Note that this is now
3610 implemented for X frames. The implementation uses updated_window
3612 updated_row
= glyph_row
;
3613 updated_area
= TEXT_AREA
;
3617 rif
->update_window_begin_hook (w
);
3619 if (glyphs
== end
- n
3620 /* In front of a space added by append_space. */
3621 || (glyphs
== end
- n
- 1
3622 && (end
- n
)->charpos
<= 0))
3623 rif
->write_glyphs (glyphs
, n
);
3625 rif
->insert_glyphs (glyphs
, n
);
3629 if (glyphs
== end
- n
)
3630 write_glyphs (glyphs
, n
);
3632 insert_glyphs (glyphs
, n
);
3635 w
->cursor
.hpos
+= n
;
3636 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3637 xassert (w
->cursor
.hpos
>= 0
3638 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3640 /* How to set the cursor differs depending on whether we are
3641 using a frame matrix or a window matrix. Note that when
3642 a frame matrix is used, cursor_to expects frame coordinates,
3643 and the X and Y parameters are not used. */
3644 if (window_redisplay_p
)
3645 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3646 w
->cursor
.y
, w
->cursor
.x
);
3650 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3651 + (INTEGERP (w
->left_margin_cols
)
3652 ? XFASTINT (w
->left_margin_cols
)
3654 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3658 update_window_fringes (w
, 0);
3661 rif
->update_window_end_hook (w
, 1, 0);
3666 TRACE ((stderr
, "direct output for insert\n"));
3667 mark_window_display_accurate (it
.window
, 1);
3668 redisplay_performed_directly_p
= 1;
3673 /* Perform a direct display update for moving PT by N positions
3674 left or right. N < 0 means a movement backwards. This function
3675 is currently only called for N == 1 or N == -1. */
3678 direct_output_forward_char (n
)
3681 struct frame
*f
= SELECTED_FRAME ();
3682 struct window
*w
= XWINDOW (selected_window
);
3683 struct glyph_row
*row
;
3685 /* Give up if point moved out of or into a composition. */
3686 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3687 current_buffer
, PT
))
3690 /* Give up if face attributes have been changed. */
3691 if (face_change_count
)
3694 /* Give up if current matrix is not up to date or we are
3695 displaying a message. */
3696 if (!display_completed
|| cursor_in_echo_area
)
3699 /* Give up if the buffer's direction is reversed. */
3700 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3703 /* Can't use direct output if highlighting a region. */
3704 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3707 /* Can't use direct output if highlighting trailing whitespace. */
3708 if (!NILP (Vshow_trailing_whitespace
))
3711 /* Give up if we are showing a message or just cleared the message
3712 because we might need to resize the echo area window. */
3713 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3716 /* Give up if currently displaying a message instead of the
3717 minibuffer contents. */
3718 if (XWINDOW (minibuf_window
) == w
3719 && EQ (minibuf_window
, echo_area_window
))
3722 /* Give up if we don't know where the cursor is. */
3723 if (w
->cursor
.vpos
< 0)
3726 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3728 /* Give up if PT is outside of the last known cursor row. */
3729 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3730 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3733 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3735 w
->last_cursor
= w
->cursor
;
3736 XSETFASTINT (w
->last_point
, PT
);
3738 xassert (w
->cursor
.hpos
>= 0
3739 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3741 if (FRAME_WINDOW_P (f
))
3742 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3743 w
->cursor
.y
, w
->cursor
.x
);
3747 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3748 + (INTEGERP (w
->left_margin_cols
)
3749 ? XFASTINT (w
->left_margin_cols
)
3751 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3756 redisplay_performed_directly_p
= 1;
3762 /***********************************************************************
3764 ***********************************************************************/
3766 /* Update frame F based on the data in desired matrices.
3768 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3769 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3772 Value is non-zero if redisplay was stopped due to pending input. */
3775 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3778 int inhibit_hairy_id_p
;
3780 /* 1 means display has been paused because of pending input. */
3782 struct window
*root_window
= XWINDOW (f
->root_window
);
3784 if (FRAME_WINDOW_P (f
))
3786 /* We are working on window matrix basis. All windows whose
3787 flag must_be_updated_p is set have to be updated. */
3789 /* Record that we are not working on frame matrices. */
3790 set_frame_matrix_frame (NULL
);
3792 /* Update all windows in the window tree of F, maybe stopping
3793 when pending input is detected. */
3796 /* Update the menu bar on X frames that don't have toolkit
3798 if (WINDOWP (f
->menu_bar_window
))
3799 update_window (XWINDOW (f
->menu_bar_window
), 1);
3801 /* Update the tool-bar window, if present. */
3802 if (WINDOWP (f
->tool_bar_window
))
3804 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3806 /* Update tool-bar window. */
3807 if (w
->must_be_updated_p
)
3811 update_window (w
, 1);
3812 w
->must_be_updated_p
= 0;
3814 /* Swap tool-bar strings. We swap because we want to
3816 tem
= f
->current_tool_bar_string
;
3817 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3818 f
->desired_tool_bar_string
= tem
;
3823 /* Update windows. */
3824 paused_p
= update_window_tree (root_window
, force_p
);
3827 #if 0 /* This flush is a performance bottleneck under X,
3828 and it doesn't seem to be necessary anyway. */
3829 rif
->flush_display (f
);
3834 /* We are working on frame matrix basis. Set the frame on whose
3835 frame matrix we operate. */
3836 set_frame_matrix_frame (f
);
3838 /* Build F's desired matrix from window matrices. */
3839 build_frame_matrix (f
);
3841 /* Update the display */
3843 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3847 fflush (termscript
);
3850 /* Check window matrices for lost pointers. */
3852 check_window_matrix_pointers (root_window
);
3853 add_frame_display_history (f
, paused_p
);
3857 /* Reset flags indicating that a window should be updated. */
3858 set_window_update_flags (root_window
, 0);
3860 display_completed
= !paused_p
;
3866 /************************************************************************
3867 Window-based updates
3868 ************************************************************************/
3870 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3871 don't stop updating when input is pending. */
3874 update_window_tree (w
, force_p
)
3880 while (w
&& !paused_p
)
3882 if (!NILP (w
->hchild
))
3883 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3884 else if (!NILP (w
->vchild
))
3885 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3886 else if (w
->must_be_updated_p
)
3887 paused_p
|= update_window (w
, force_p
);
3889 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3896 /* Update window W if its flag must_be_updated_p is non-zero. If
3897 FORCE_P is non-zero, don't stop updating if input is pending. */
3900 update_single_window (w
, force_p
)
3904 if (w
->must_be_updated_p
)
3906 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3908 /* Record that this is not a frame-based redisplay. */
3909 set_frame_matrix_frame (NULL
);
3913 update_window (w
, force_p
);
3916 /* Reset flag in W. */
3917 w
->must_be_updated_p
= 0;
3922 /* Redraw lines from the current matrix of window W that are
3923 overlapped by other rows. YB is bottom-most y-position in W. */
3926 redraw_overlapped_rows (w
, yb
)
3932 /* If rows overlapping others have been changed, the rows being
3933 overlapped have to be redrawn. This won't draw lines that have
3934 already been drawn in update_window_line because overlapped_p in
3935 desired rows is 0, so after row assignment overlapped_p in
3936 current rows is 0. */
3937 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3939 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3941 if (!row
->enabled_p
)
3943 else if (row
->mode_line_p
)
3946 if (row
->overlapped_p
)
3948 enum glyph_row_area area
;
3950 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3953 updated_area
= area
;
3954 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3955 if (row
->used
[area
])
3956 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3957 rif
->clear_end_of_line (-1);
3960 row
->overlapped_p
= 0;
3963 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3969 /* Redraw lines from the current matrix of window W that overlap
3970 others. YB is bottom-most y-position in W. */
3973 redraw_overlapping_rows (w
, yb
)
3978 struct glyph_row
*row
;
3980 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3982 row
= w
->current_matrix
->rows
+ i
;
3984 if (!row
->enabled_p
)
3986 else if (row
->mode_line_p
)
3989 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3991 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3993 if (row
->used
[LEFT_MARGIN_AREA
])
3994 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3996 if (row
->used
[TEXT_AREA
])
3997 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3999 if (row
->used
[RIGHT_MARGIN_AREA
])
4000 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4002 /* Record in neighbour rows that ROW overwrites part of their
4004 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4005 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4006 if ((row
->phys_height
- row
->phys_ascent
4007 > row
->height
- row
->ascent
)
4009 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4020 /* Check that no row in the current matrix of window W is enabled
4021 which is below what's displayed in the window. */
4024 check_current_matrix_flags (w
)
4027 int last_seen_p
= 0;
4028 int i
, yb
= window_text_bottom_y (w
);
4030 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4032 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4033 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4035 else if (last_seen_p
&& row
->enabled_p
)
4040 #endif /* GLYPH_DEBUG */
4043 /* Update display of window W. FORCE_P non-zero means that we should
4044 not stop when detecting pending input. */
4047 update_window (w
, force_p
)
4051 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4053 int preempt_count
= baud_rate
/ 2400 + 1;
4054 extern int input_pending
;
4055 extern Lisp_Object do_mouse_tracking
;
4057 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4060 /* Check that W's frame doesn't have glyph matrices. */
4061 xassert (FRAME_WINDOW_P (f
));
4062 xassert (updating_frame
!= NULL
);
4064 /* Check pending input the first time so that we can quickly return. */
4065 if (redisplay_dont_pause
)
4068 detect_input_pending ();
4070 /* If forced to complete the update, or if no input is pending, do
4072 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4074 struct glyph_row
*row
, *end
;
4075 struct glyph_row
*mode_line_row
;
4076 struct glyph_row
*header_line_row
;
4077 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4079 rif
->update_window_begin_hook (w
);
4080 yb
= window_text_bottom_y (w
);
4082 /* If window has a header line, update it before everything else.
4083 Adjust y-positions of other rows by the header line height. */
4084 row
= desired_matrix
->rows
;
4085 end
= row
+ desired_matrix
->nrows
- 1;
4087 if (row
->mode_line_p
)
4089 header_line_row
= row
;
4093 header_line_row
= NULL
;
4095 /* Update the mode line, if necessary. */
4096 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4097 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4099 mode_line_row
->y
= yb
;
4100 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4102 &mouse_face_overwritten_p
);
4106 /* Find first enabled row. Optimizations in redisplay_internal
4107 may lead to an update with only one row enabled. There may
4108 be also completely empty matrices. */
4109 while (row
< end
&& !row
->enabled_p
)
4112 /* Try reusing part of the display by copying. */
4113 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4115 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4118 /* All rows were found to be equal. */
4123 /* We've scrolled the display. */
4128 /* Update the header line after scrolling because a new header
4129 line would otherwise overwrite lines at the top of the window
4130 that can be scrolled. */
4131 if (header_line_row
&& header_line_row
->enabled_p
)
4133 header_line_row
->y
= 0;
4134 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4138 /* Update the rest of the lines. */
4139 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4142 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4145 /* We'll have to play a little bit with when to
4146 detect_input_pending. If it's done too often,
4147 scrolling large windows with repeated scroll-up
4148 commands will too quickly pause redisplay. */
4149 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4150 detect_input_pending ();
4152 changed_p
|= update_window_line (w
, vpos
,
4153 &mouse_face_overwritten_p
);
4155 /* Mark all rows below the last visible one in the current
4156 matrix as invalid. This is necessary because of
4157 variable line heights. Consider the case of three
4158 successive redisplays, where the first displays 5
4159 lines, the second 3 lines, and the third 5 lines again.
4160 If the second redisplay wouldn't mark rows in the
4161 current matrix invalid, the third redisplay might be
4162 tempted to optimize redisplay based on lines displayed
4163 in the first redisplay. */
4164 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4165 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4166 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4169 /* Was display preempted? */
4170 paused_p
= row
< end
;
4174 /* Fix the appearance of overlapping/overlapped rows. */
4175 if (!paused_p
&& !w
->pseudo_window_p
)
4177 if (changed_p
&& rif
->fix_overlapping_area
)
4179 redraw_overlapped_rows (w
, yb
);
4180 redraw_overlapping_rows (w
, yb
);
4183 /* Make cursor visible at cursor position of W. */
4184 set_window_cursor_after_update (w
);
4186 #if 0 /* Check that current matrix invariants are satisfied. This is
4187 for debugging only. See the comment of check_matrix_invariants. */
4188 IF_DEBUG (check_matrix_invariants (w
));
4193 /* Remember the redisplay method used to display the matrix. */
4194 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4197 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 || current_row
->redraw_fringe_bitmaps_p
4519 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4520 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4521 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4522 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4523 rif
->after_update_window_line_hook (desired_row
);
4526 /* Update current_row from desired_row. */
4527 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4533 /* Set the cursor after an update of window W. This function may only
4534 be called from update_window. */
4537 set_window_cursor_after_update (w
)
4540 struct frame
*f
= XFRAME (w
->frame
);
4541 int cx
, cy
, vpos
, hpos
;
4543 /* Not intended for frame matrix updates. */
4544 xassert (FRAME_WINDOW_P (f
));
4546 if (cursor_in_echo_area
4547 && !NILP (echo_area_buffer
[0])
4548 /* If we are showing a message instead of the mini-buffer,
4549 show the cursor for the message instead. */
4550 && XWINDOW (minibuf_window
) == w
4551 && EQ (minibuf_window
, echo_area_window
)
4552 /* These cases apply only to the frame that contains
4553 the active mini-buffer window. */
4554 && FRAME_HAS_MINIBUF_P (f
)
4555 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4557 cx
= cy
= vpos
= hpos
= 0;
4559 if (cursor_in_echo_area
>= 0)
4561 /* If the mini-buffer is several lines high, find the last
4562 line that has any text on it. Note: either all lines
4563 are enabled or none. Otherwise we wouldn't be able to
4565 struct glyph_row
*row
, *last_row
;
4566 struct glyph
*glyph
;
4567 int yb
= window_text_bottom_y (w
);
4570 row
= w
->current_matrix
->rows
;
4571 while (row
->enabled_p
4572 && (last_row
== NULL
4573 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4575 if (row
->used
[TEXT_AREA
]
4576 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4583 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4584 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4586 while (last
> start
&& last
->charpos
< 0)
4589 for (glyph
= start
; glyph
< last
; ++glyph
)
4591 cx
+= glyph
->pixel_width
;
4596 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4604 hpos
= w
->cursor
.hpos
;
4605 vpos
= w
->cursor
.vpos
;
4608 /* Window cursor can be out of sync for horizontally split windows. */
4609 hpos
= max (0, hpos
);
4610 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4611 vpos
= max (0, vpos
);
4612 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4613 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4617 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4618 tree rooted at W. */
4621 set_window_update_flags (w
, on_p
)
4627 if (!NILP (w
->hchild
))
4628 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4629 else if (!NILP (w
->vchild
))
4630 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4632 w
->must_be_updated_p
= on_p
;
4634 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4640 /***********************************************************************
4641 Window-Based Scrolling
4642 ***********************************************************************/
4644 /* Structure describing rows in scrolling_window. */
4648 /* Number of occurrences of this row in desired and current matrix. */
4649 int old_uses
, new_uses
;
4651 /* Vpos of row in new matrix. */
4652 int new_line_number
;
4654 /* Bucket index of this row_entry in the hash table row_table. */
4657 /* The row described by this entry. */
4658 struct glyph_row
*row
;
4660 /* Hash collision chain. */
4661 struct row_entry
*next
;
4664 /* A pool to allocate row_entry structures from, and the size of the
4665 pool. The pool is reallocated in scrolling_window when we find
4666 that we need a larger one. */
4668 static struct row_entry
*row_entry_pool
;
4669 static int row_entry_pool_size
;
4671 /* Index of next free entry in row_entry_pool. */
4673 static int row_entry_idx
;
4675 /* The hash table used during scrolling, and the table's size. This
4676 table is used to quickly identify equal rows in the desired and
4679 static struct row_entry
**row_table
;
4680 static int row_table_size
;
4682 /* Vectors of pointers to row_entry structures belonging to the
4683 current and desired matrix, and the size of the vectors. */
4685 static struct row_entry
**old_lines
, **new_lines
;
4686 static int old_lines_size
, new_lines_size
;
4688 /* A pool to allocate run structures from, and its size. */
4690 static struct run
*run_pool
;
4691 static int runs_size
;
4693 /* A vector of runs of lines found during scrolling. */
4695 static struct run
**runs
;
4697 /* Add glyph row ROW to the scrolling hash table during the scrolling
4700 static INLINE
struct row_entry
*
4701 add_row_entry (w
, row
)
4703 struct glyph_row
*row
;
4705 struct row_entry
*entry
;
4706 int i
= row
->hash
% row_table_size
;
4708 entry
= row_table
[i
];
4709 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4710 entry
= entry
->next
;
4714 entry
= row_entry_pool
+ row_entry_idx
++;
4716 entry
->old_uses
= entry
->new_uses
= 0;
4717 entry
->new_line_number
= 0;
4719 entry
->next
= row_table
[i
];
4720 row_table
[i
] = entry
;
4727 /* Try to reuse part of the current display of W by scrolling lines.
4728 HEADER_LINE_P non-zero means W has a header line.
4730 The algorithm is taken from Communications of the ACM, Apr78 "A
4731 Technique for Isolating Differences Between Files." It should take
4734 A short outline of the steps of the algorithm
4736 1. Skip lines equal at the start and end of both matrices.
4738 2. Enter rows in the current and desired matrix into a symbol
4739 table, counting how often they appear in both matrices.
4741 3. Rows that appear exactly once in both matrices serve as anchors,
4742 i.e. we assume that such lines are likely to have been moved.
4744 4. Starting from anchor lines, extend regions to be scrolled both
4745 forward and backward.
4749 -1 if all rows were found to be equal.
4750 0 to indicate that we did not scroll the display, or
4751 1 if we did scroll. */
4754 scrolling_window (w
, header_line_p
)
4758 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4759 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4760 int yb
= window_text_bottom_y (w
);
4761 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4762 int nruns
, nbytes
, n
, run_idx
;
4763 struct row_entry
*entry
;
4765 /* Skip over rows equal at the start. */
4766 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4768 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4769 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4773 && !d
->redraw_fringe_bitmaps_p
4775 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4776 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4777 && row_equal_p (w
, c
, d
, 1))
4786 /* Give up if some rows in the desired matrix are not enabled. */
4787 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4790 first_old
= first_new
= i
;
4792 /* Set last_new to the index + 1 of the last enabled row in the
4795 while (i
< desired_matrix
->nrows
- 1
4796 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4797 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4800 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4805 /* Set last_old to the index + 1 of the last enabled row in the
4806 current matrix. We don't look at the enabled flag here because
4807 we plan to reuse part of the display even if other parts are
4810 while (i
< current_matrix
->nrows
- 1)
4812 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4821 /* Skip over rows equal at the bottom. */
4824 while (i
- 1 > first_new
4825 && j
- 1 > first_old
4826 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4827 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4828 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4829 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4831 MATRIX_ROW (desired_matrix
, i
- 1),
4832 MATRIX_ROW (current_matrix
, j
- 1), 1))
4837 /* Nothing to do if all rows are equal. */
4838 if (last_new
== first_new
)
4841 /* Reallocate vectors, tables etc. if necessary. */
4843 if (current_matrix
->nrows
> old_lines_size
)
4845 old_lines_size
= current_matrix
->nrows
;
4846 nbytes
= old_lines_size
* sizeof *old_lines
;
4847 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4850 if (desired_matrix
->nrows
> new_lines_size
)
4852 new_lines_size
= desired_matrix
->nrows
;
4853 nbytes
= new_lines_size
* sizeof *new_lines
;
4854 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4857 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4858 if (3 * n
> row_table_size
)
4860 row_table_size
= next_almost_prime (3 * n
);
4861 nbytes
= row_table_size
* sizeof *row_table
;
4862 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4863 bzero (row_table
, nbytes
);
4866 if (n
> row_entry_pool_size
)
4868 row_entry_pool_size
= n
;
4869 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4870 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4873 if (desired_matrix
->nrows
> runs_size
)
4875 runs_size
= desired_matrix
->nrows
;
4876 nbytes
= runs_size
* sizeof *runs
;
4877 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4878 nbytes
= runs_size
* sizeof *run_pool
;
4879 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4882 nruns
= run_idx
= 0;
4885 /* Add rows from the current and desired matrix to the hash table
4886 row_hash_table to be able to find equal ones quickly. */
4888 for (i
= first_old
; i
< last_old
; ++i
)
4890 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4892 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4893 old_lines
[i
] = entry
;
4897 old_lines
[i
] = NULL
;
4900 for (i
= first_new
; i
< last_new
; ++i
)
4902 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4903 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4905 entry
->new_line_number
= i
;
4906 new_lines
[i
] = entry
;
4909 /* Identify moves based on lines that are unique and equal
4910 in both matrices. */
4911 for (i
= first_old
; i
< last_old
;)
4913 && old_lines
[i
]->old_uses
== 1
4914 && old_lines
[i
]->new_uses
== 1)
4917 int new_line
= old_lines
[i
]->new_line_number
;
4918 struct run
*run
= run_pool
+ run_idx
++;
4921 run
->current_vpos
= i
;
4922 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4923 run
->desired_vpos
= new_line
;
4924 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4926 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4928 /* Extend backward. */
4931 while (j
> first_old
4933 && old_lines
[j
] == new_lines
[k
])
4935 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4936 --run
->current_vpos
;
4937 --run
->desired_vpos
;
4940 run
->desired_y
-= h
;
4941 run
->current_y
-= h
;
4945 /* Extend forward. */
4950 && old_lines
[j
] == new_lines
[k
])
4952 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4958 /* Insert run into list of all runs. Order runs by copied
4959 pixel lines. Note that we record runs that don't have to
4960 be copied because they are already in place. This is done
4961 because we can avoid calling update_window_line in this
4963 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4965 for (k
= nruns
; k
> j
; --k
)
4966 runs
[k
] = runs
[k
- 1];
4975 /* Do the moves. Do it in a way that we don't overwrite something
4976 we want to copy later on. This is not solvable in general
4977 because there is only one display and we don't have a way to
4978 exchange areas on this display. Example:
4980 +-----------+ +-----------+
4982 +-----------+ --> +-----------+
4984 +-----------+ +-----------+
4986 Instead, prefer bigger moves, and invalidate moves that would
4987 copy from where we copied to. */
4989 for (i
= 0; i
< nruns
; ++i
)
4990 if (runs
[i
]->nrows
> 0)
4992 struct run
*r
= runs
[i
];
4994 /* Copy on the display. */
4995 if (r
->current_y
!= r
->desired_y
)
4997 rif
->scroll_run_hook (w
, r
);
4999 /* Invalidate runs that copy from where we copied to. */
5000 for (j
= i
+ 1; j
< nruns
; ++j
)
5002 struct run
*p
= runs
[j
];
5004 if ((p
->current_y
>= r
->desired_y
5005 && p
->current_y
< r
->desired_y
+ r
->height
)
5006 || (p
->current_y
+ p
->height
>= r
->desired_y
5007 && (p
->current_y
+ p
->height
5008 < r
->desired_y
+ r
->height
)))
5013 /* Assign matrix rows. */
5014 for (j
= 0; j
< r
->nrows
; ++j
)
5016 struct glyph_row
*from
, *to
;
5017 int to_overlapped_p
;
5019 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5020 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5021 to_overlapped_p
= to
->overlapped_p
;
5022 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5023 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5024 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
))
5025 from
->redraw_fringe_bitmaps_p
= 1;
5026 assign_row (to
, from
);
5027 to
->enabled_p
= 1, from
->enabled_p
= 0;
5028 to
->overlapped_p
= to_overlapped_p
;
5032 /* Clear the hash table, for the next time. */
5033 for (i
= 0; i
< row_entry_idx
; ++i
)
5034 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5036 /* Value is non-zero to indicate that we scrolled the display. */
5042 /************************************************************************
5044 ************************************************************************/
5046 /* Update the desired frame matrix of frame F.
5048 FORCE_P non-zero means that the update should not be stopped by
5049 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5050 should not be tried.
5052 Value is non-zero if update was stopped due to pending input. */
5055 update_frame_1 (f
, force_p
, inhibit_id_p
)
5060 /* Frame matrices to work on. */
5061 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5062 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5065 int preempt_count
= baud_rate
/ 2400 + 1;
5066 extern int input_pending
;
5068 xassert (current_matrix
&& desired_matrix
);
5070 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5071 calculate_costs (f
);
5073 if (preempt_count
<= 0)
5076 if (redisplay_dont_pause
)
5078 else if (!force_p
&& detect_input_pending ())
5084 /* If we cannot insert/delete lines, it's no use trying it. */
5085 if (!line_ins_del_ok
)
5088 /* See if any of the desired lines are enabled; don't compute for
5089 i/d line if just want cursor motion. */
5090 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5091 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5094 /* Try doing i/d line, if not yet inhibited. */
5095 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5096 force_p
|= scrolling (f
);
5098 /* Update the individual lines as needed. Do bottom line first. */
5099 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5100 update_frame_line (f
, desired_matrix
->nrows
- 1);
5102 /* Now update the rest of the lines. */
5103 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5105 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5107 if (FRAME_TERMCAP_P (f
))
5109 /* Flush out every so many lines.
5110 Also flush out if likely to have more than 1k buffered
5111 otherwise. I'm told that some telnet connections get
5112 really screwed by more than 1k output at once. */
5113 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5115 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5118 if (preempt_count
== 1)
5120 #ifdef EMACS_OUTQSIZE
5121 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5122 /* Probably not a tty. Ignore the error and reset
5124 outq
= PENDING_OUTPUT_COUNT (stdout
);
5127 if (baud_rate
<= outq
&& baud_rate
> 0)
5128 sleep (outq
/ baud_rate
);
5133 if ((i
- 1) % preempt_count
== 0)
5134 detect_input_pending ();
5136 update_frame_line (f
, i
);
5140 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5142 /* Now just clean up termcap drivers and set cursor, etc. */
5145 if ((cursor_in_echo_area
5146 /* If we are showing a message instead of the mini-buffer,
5147 show the cursor for the message instead of for the
5148 (now hidden) mini-buffer contents. */
5149 || (EQ (minibuf_window
, selected_window
)
5150 && EQ (minibuf_window
, echo_area_window
)
5151 && !NILP (echo_area_buffer
[0])))
5152 /* These cases apply only to the frame that contains
5153 the active mini-buffer window. */
5154 && FRAME_HAS_MINIBUF_P (f
)
5155 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5157 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5160 if (cursor_in_echo_area
< 0)
5162 /* Negative value of cursor_in_echo_area means put
5163 cursor at beginning of line. */
5169 /* Positive value of cursor_in_echo_area means put
5170 cursor at the end of the prompt. If the mini-buffer
5171 is several lines high, find the last line that has
5173 row
= FRAME_LINES (f
);
5179 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5181 /* Frame rows are filled up with spaces that
5182 must be ignored here. */
5183 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5185 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5186 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5189 && (last
- 1)->charpos
< 0)
5195 while (row
> top
&& col
== 0);
5197 /* Make sure COL is not out of range. */
5198 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5200 /* If we have another row, advance cursor into it. */
5201 if (row
< FRAME_LINES (f
) - 1)
5203 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5206 /* Otherwise move it back in range. */
5208 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5212 cursor_to (row
, col
);
5216 /* We have only one cursor on terminal frames. Use it to
5217 display the cursor of the selected window. */
5218 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5219 if (w
->cursor
.vpos
>= 0
5220 /* The cursor vpos may be temporarily out of bounds
5221 in the following situation: There is one window,
5222 with the cursor in the lower half of it. The window
5223 is split, and a message causes a redisplay before
5224 a new cursor position has been computed. */
5225 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5227 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5228 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5230 if (INTEGERP (w
->left_margin_cols
))
5231 x
+= XFASTINT (w
->left_margin_cols
);
5233 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5241 clear_desired_matrices (f
);
5246 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5250 struct frame
*frame
;
5252 int unchanged_at_top
, unchanged_at_bottom
;
5255 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5256 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5257 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5258 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5260 int free_at_end_vpos
= FRAME_LINES (frame
);
5261 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5262 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5264 if (!current_matrix
)
5267 /* Compute hash codes of all the lines. Also calculate number of
5268 changed lines, number of unchanged lines at the beginning, and
5269 number of unchanged lines at the end. */
5271 unchanged_at_top
= 0;
5272 unchanged_at_bottom
= FRAME_LINES (frame
);
5273 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5275 /* Give up on this scrolling if some old lines are not enabled. */
5276 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5278 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5279 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5281 /* This line cannot be redrawn, so don't let scrolling mess it. */
5282 new_hash
[i
] = old_hash
[i
];
5283 #define INFINITY 1000000 /* Taken from scroll.c */
5284 draw_cost
[i
] = INFINITY
;
5288 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5289 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5292 if (old_hash
[i
] != new_hash
[i
])
5295 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5297 else if (i
== unchanged_at_top
)
5299 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5302 /* If changed lines are few, don't allow preemption, don't scroll. */
5303 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5304 || unchanged_at_bottom
== FRAME_LINES (frame
))
5307 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5308 - unchanged_at_bottom
);
5310 if (scroll_region_ok
)
5311 free_at_end_vpos
-= unchanged_at_bottom
;
5312 else if (memory_below_frame
)
5313 free_at_end_vpos
= -1;
5315 /* If large window, fast terminal and few lines in common between
5316 current frame and desired frame, don't bother with i/d calc. */
5317 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5319 10 * scrolling_max_lines_saved (unchanged_at_top
,
5320 FRAME_LINES (frame
) - unchanged_at_bottom
,
5321 old_hash
, new_hash
, draw_cost
)))
5324 if (window_size
< 2)
5327 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5328 draw_cost
+ unchanged_at_top
- 1,
5329 old_draw_cost
+ unchanged_at_top
- 1,
5330 old_hash
+ unchanged_at_top
- 1,
5331 new_hash
+ unchanged_at_top
- 1,
5332 free_at_end_vpos
- unchanged_at_top
);
5338 /* Count the number of blanks at the start of the vector of glyphs R
5339 which is LEN glyphs long. */
5342 count_blanks (r
, len
)
5348 for (i
= 0; i
< len
; ++i
)
5349 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5356 /* Count the number of glyphs in common at the start of the glyph
5357 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5358 of STR2. Value is the number of equal glyphs equal at the start. */
5361 count_match (str1
, end1
, str2
, end2
)
5362 struct glyph
*str1
, *end1
, *str2
, *end2
;
5364 struct glyph
*p1
= str1
;
5365 struct glyph
*p2
= str2
;
5369 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5376 /* Char insertion/deletion cost vector, from term.c */
5378 extern int *char_ins_del_vector
;
5379 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5382 /* Perform a frame-based update on line VPOS in frame FRAME. */
5385 update_frame_line (f
, vpos
)
5389 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5391 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5392 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5393 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5394 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5395 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5396 int must_write_whole_line_p
;
5397 int write_spaces_p
= must_write_spaces
;
5398 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5399 != FACE_TTY_DEFAULT_BG_COLOR
);
5401 if (colored_spaces_p
)
5404 /* Current row not enabled means it has unknown contents. We must
5405 write the whole desired line in that case. */
5406 must_write_whole_line_p
= !current_row
->enabled_p
;
5407 if (must_write_whole_line_p
)
5414 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5415 olen
= current_row
->used
[TEXT_AREA
];
5417 /* Ignore trailing spaces, if we can. */
5418 if (!write_spaces_p
)
5419 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5423 current_row
->enabled_p
= 1;
5424 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5426 /* If desired line is empty, just clear the line. */
5427 if (!desired_row
->enabled_p
)
5433 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5434 nlen
= desired_row
->used
[TEXT_AREA
];
5435 nend
= nbody
+ nlen
;
5437 /* If display line has unknown contents, write the whole line. */
5438 if (must_write_whole_line_p
)
5440 /* Ignore spaces at the end, if we can. */
5441 if (!write_spaces_p
)
5442 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5445 /* Write the contents of the desired line. */
5448 cursor_to (vpos
, 0);
5449 write_glyphs (nbody
, nlen
);
5452 /* Don't call clear_end_of_line if we already wrote the whole
5453 line. The cursor will not be at the right margin in that
5454 case but in the line below. */
5455 if (nlen
< FRAME_TOTAL_COLS (f
))
5457 cursor_to (vpos
, nlen
);
5458 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5461 /* Make sure we are in the right row, otherwise cursor movement
5462 with cmgoto might use `ch' in the wrong row. */
5463 cursor_to (vpos
, 0);
5465 make_current (desired_matrix
, current_matrix
, vpos
);
5469 /* Pretend trailing spaces are not there at all,
5470 unless for one reason or another we must write all spaces. */
5471 if (!write_spaces_p
)
5472 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5475 /* If there's no i/d char, quickly do the best we can without it. */
5476 if (!char_ins_del_ok
)
5480 /* Find the first glyph in desired row that doesn't agree with
5481 a glyph in the current row, and write the rest from there on. */
5482 for (i
= 0; i
< nlen
; i
++)
5484 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5486 /* Find the end of the run of different glyphs. */
5490 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5491 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5494 /* Output this run of non-matching chars. */
5495 cursor_to (vpos
, i
);
5496 write_glyphs (nbody
+ i
, j
- i
);
5499 /* Now find the next non-match. */
5503 /* Clear the rest of the line, or the non-clear part of it. */
5506 cursor_to (vpos
, nlen
);
5507 clear_end_of_line (olen
);
5510 /* Make current row = desired row. */
5511 make_current (desired_matrix
, current_matrix
, vpos
);
5515 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5516 characters in a row. */
5520 /* If current line is blank, skip over initial spaces, if
5521 possible, and write the rest. */
5525 nsp
= count_blanks (nbody
, nlen
);
5529 cursor_to (vpos
, nsp
);
5530 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5533 /* Exchange contents between current_frame and new_frame. */
5534 make_current (desired_matrix
, current_matrix
, vpos
);
5538 /* Compute number of leading blanks in old and new contents. */
5539 osp
= count_blanks (obody
, olen
);
5540 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5542 /* Compute number of matching chars starting with first non-blank. */
5543 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5544 nbody
+ nsp
, nbody
+ nlen
);
5546 /* Spaces in new match implicit space past the end of old. */
5547 /* A bug causing this to be a no-op was fixed in 18.29. */
5548 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5551 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5555 /* Avoid doing insert/delete char
5556 just cause number of leading spaces differs
5557 when the following text does not match. */
5558 if (begmatch
== 0 && osp
!= nsp
)
5559 osp
= nsp
= min (osp
, nsp
);
5561 /* Find matching characters at end of line */
5564 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5566 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5571 endmatch
= obody
+ olen
- op1
;
5573 /* tem gets the distance to insert or delete.
5574 endmatch is how many characters we save by doing so.
5577 tem
= (nlen
- nsp
) - (olen
- osp
);
5579 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5582 /* nsp - osp is the distance to insert or delete.
5583 If that is nonzero, begmatch is known to be nonzero also.
5584 begmatch + endmatch is how much we save by doing the ins/del.
5588 && (!char_ins_del_ok
5589 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5593 osp
= nsp
= min (osp
, nsp
);
5596 /* Now go through the line, inserting, writing and
5597 deleting as appropriate. */
5601 cursor_to (vpos
, nsp
);
5602 delete_glyphs (osp
- nsp
);
5606 /* If going to delete chars later in line
5607 and insert earlier in the line,
5608 must delete first to avoid losing data in the insert */
5609 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5611 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5612 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5613 olen
= nlen
- (nsp
- osp
);
5615 cursor_to (vpos
, osp
);
5616 insert_glyphs (0, nsp
- osp
);
5620 tem
= nsp
+ begmatch
+ endmatch
;
5621 if (nlen
!= tem
|| olen
!= tem
)
5623 if (!endmatch
|| nlen
== olen
)
5625 /* If new text being written reaches right margin, there is
5626 no need to do clear-to-eol at the end of this function
5627 (and it would not be safe, since cursor is not going to
5628 be "at the margin" after the text is done). */
5629 if (nlen
== FRAME_TOTAL_COLS (f
))
5632 /* Function write_glyphs is prepared to do nothing
5633 if passed a length <= 0. Check it here to avoid
5634 unnecessary cursor movement. */
5637 cursor_to (vpos
, nsp
+ begmatch
);
5638 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5641 else if (nlen
> olen
)
5643 /* Here, we used to have the following simple code:
5644 ----------------------------------------
5645 write_glyphs (nbody + nsp + begmatch, olen - tem);
5646 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5647 ----------------------------------------
5648 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5649 is a padding glyph. */
5650 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5653 cursor_to (vpos
, nsp
+ begmatch
);
5655 /* Calculate columns we can actually overwrite. */
5656 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5658 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5660 /* If we left columns to be overwritten, we must delete them. */
5661 del
= olen
- tem
- out
;
5663 delete_glyphs (del
);
5665 /* At last, we insert columns not yet written out. */
5666 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5669 else if (olen
> nlen
)
5671 cursor_to (vpos
, nsp
+ begmatch
);
5672 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5673 delete_glyphs (olen
- nlen
);
5679 /* If any unerased characters remain after the new line, erase them. */
5682 cursor_to (vpos
, nlen
);
5683 clear_end_of_line (olen
);
5686 /* Exchange contents between current_frame and new_frame. */
5687 make_current (desired_matrix
, current_matrix
, vpos
);
5692 /***********************************************************************
5693 X/Y Position -> Buffer Position
5694 ***********************************************************************/
5696 /* Determine what's under window-relative pixel position (*X, *Y).
5697 Return the object (string or buffer) that's there.
5698 Return in *POS the position in that object.
5699 Adjust *X and *Y to character positions. */
5702 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5705 struct display_pos
*pos
;
5706 Lisp_Object
*object
;
5708 int *width
, *height
;
5711 struct buffer
*old_current_buffer
= current_buffer
;
5712 struct text_pos startp
;
5714 struct glyph_row
*row
;
5717 current_buffer
= XBUFFER (w
->buffer
);
5718 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5719 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5720 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5721 start_display (&it
, w
, startp
);
5723 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5724 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5725 MOVE_TO_X
| MOVE_TO_Y
);
5727 current_buffer
= old_current_buffer
;
5729 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5730 *dy
= *y
- it
.current_y
;
5733 if (STRINGP (it
.string
))
5737 #ifdef HAVE_WINDOW_SYSTEM
5738 if (it
.what
== IT_IMAGE
)
5741 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5742 && !NILP (img
->spec
))
5743 *object
= img
->spec
;
5747 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5750 if (it
.hpos
< row
->used
[TEXT_AREA
])
5752 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5753 *width
= glyph
->pixel_width
;
5754 *height
= glyph
->ascent
+ glyph
->descent
;
5755 #ifdef HAVE_WINDOW_SYSTEM
5756 if (glyph
->type
== IMAGE_GLYPH
)
5757 *dy
-= row
->ascent
- glyph
->ascent
;
5763 *height
= row
->height
;
5768 *width
= *height
= 0;
5771 /* Add extra (default width) columns if clicked after EOL. */
5772 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5774 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5783 /* Value is the string under window-relative coordinates X/Y in the
5784 mode line or header line (PART says which) of window W, or nil if none.
5785 *CHARPOS is set to the position in the string returned. */
5788 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5790 enum window_part part
;
5793 Lisp_Object
*object
;
5795 int *width
, *height
;
5797 struct glyph_row
*row
;
5798 struct glyph
*glyph
, *end
;
5800 Lisp_Object string
= Qnil
;
5802 if (part
== ON_MODE_LINE
)
5803 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5805 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5807 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5809 if (row
->mode_line_p
&& row
->enabled_p
)
5811 /* Find the glyph under X. If we find one with a string object,
5812 it's the one we were looking for. */
5813 glyph
= row
->glyphs
[TEXT_AREA
];
5814 end
= glyph
+ row
->used
[TEXT_AREA
];
5815 for (x0
= *x
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5816 x0
-= glyph
->pixel_width
;
5817 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5820 string
= glyph
->object
;
5821 *charpos
= glyph
->charpos
;
5822 *width
= glyph
->pixel_width
;
5823 *height
= glyph
->ascent
+ glyph
->descent
;
5824 #ifdef HAVE_WINDOW_SYSTEM
5825 if (glyph
->type
== IMAGE_GLYPH
)
5828 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5830 *object
= img
->spec
;
5831 y0
-= row
->ascent
- glyph
->ascent
;
5837 /* Add extra (default width) columns if clicked after EOL. */
5838 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5840 *height
= row
->height
;
5847 *width
= *height
= 0;
5857 /* Value is the string under window-relative coordinates X/Y in either
5858 marginal area, or nil if none. *CHARPOS is set to the position in
5859 the string returned. */
5862 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5864 enum window_part part
;
5867 Lisp_Object
*object
;
5869 int *width
, *height
;
5871 struct glyph_row
*row
= w
->current_matrix
->rows
;
5872 struct glyph
*glyph
, *end
;
5873 int x0
, y0
, i
, wy
= *y
;
5875 Lisp_Object string
= Qnil
;
5877 if (part
== ON_LEFT_MARGIN
)
5878 area
= LEFT_MARGIN_AREA
;
5879 else if (part
== ON_RIGHT_MARGIN
)
5880 area
= RIGHT_MARGIN_AREA
;
5884 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5885 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5888 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5892 /* Find the glyph under X. If we find one with a string object,
5893 it's the one we were looking for. */
5894 if (area
== RIGHT_MARGIN_AREA
)
5895 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5896 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5897 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5898 + window_box_width (w
, LEFT_MARGIN_AREA
)
5899 + window_box_width (w
, TEXT_AREA
));
5901 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5902 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5905 glyph
= row
->glyphs
[area
];
5906 end
= glyph
+ row
->used
[area
];
5907 for (x0
= *x
- x0
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5908 x0
-= glyph
->pixel_width
;
5909 *x
= glyph
- row
->glyphs
[area
];
5912 string
= glyph
->object
;
5913 *charpos
= glyph
->charpos
;
5914 *width
= glyph
->pixel_width
;
5915 *height
= glyph
->ascent
+ glyph
->descent
;
5916 #ifdef HAVE_WINDOW_SYSTEM
5917 if (glyph
->type
== IMAGE_GLYPH
)
5920 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5922 *object
= img
->spec
;
5923 y0
-= row
->ascent
- glyph
->ascent
;
5929 /* Add extra (default width) columns if clicked after EOL. */
5930 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5932 *height
= row
->height
;
5939 *width
= *height
= 0;
5949 /***********************************************************************
5950 Changing Frame Sizes
5951 ***********************************************************************/
5956 window_change_signal (signalnum
) /* If we don't have an argument, */
5957 int signalnum
; /* some compilers complain in signal calls. */
5963 int old_errno
= errno
;
5965 get_frame_size (&width
, &height
);
5967 /* The frame size change obviously applies to a termcap-controlled
5968 frame. Find such a frame in the list, and assume it's the only
5969 one (since the redisplay code always writes to stdout, not a
5970 FILE * specified in the frame structure). Record the new size,
5971 but don't reallocate the data structures now. Let that be done
5972 later outside of the signal handler. */
5975 Lisp_Object tail
, frame
;
5977 FOR_EACH_FRAME (tail
, frame
)
5979 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5981 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5987 signal (SIGWINCH
, window_change_signal
);
5990 #endif /* SIGWINCH */
5993 /* Do any change in frame size that was requested by a signal. SAFE
5994 non-zero means this function is called from a place where it is
5995 safe to change frame sizes while a redisplay is in progress. */
5998 do_pending_window_change (safe
)
6001 /* If window_change_signal should have run before, run it now. */
6002 if (redisplaying_p
&& !safe
)
6005 while (delayed_size_change
)
6007 Lisp_Object tail
, frame
;
6009 delayed_size_change
= 0;
6011 FOR_EACH_FRAME (tail
, frame
)
6013 struct frame
*f
= XFRAME (frame
);
6015 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6016 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6023 /* Change the frame height and/or width. Values may be given as zero to
6024 indicate no change is to take place.
6026 If DELAY is non-zero, then assume we're being called from a signal
6027 handler, and queue the change for later - perhaps the next
6028 redisplay. Since this tries to resize windows, we can't call it
6029 from a signal handler.
6031 SAFE non-zero means this function is called from a place where it's
6032 safe to change frame sizes while a redisplay is in progress. */
6035 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6036 register struct frame
*f
;
6037 int newheight
, newwidth
, pretend
, delay
, safe
;
6039 Lisp_Object tail
, frame
;
6041 if (! FRAME_WINDOW_P (f
))
6043 /* When using termcap, or on MS-DOS, all frames use
6044 the same screen, so a change in size affects all frames. */
6045 FOR_EACH_FRAME (tail
, frame
)
6046 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6047 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6048 pretend
, delay
, safe
);
6051 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6055 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6056 register struct frame
*f
;
6057 int newheight
, newwidth
, pretend
, delay
, safe
;
6059 int new_frame_total_cols
;
6060 int count
= SPECPDL_INDEX ();
6062 /* If we can't deal with the change now, queue it for later. */
6063 if (delay
|| (redisplaying_p
&& !safe
))
6065 f
->new_text_lines
= newheight
;
6066 f
->new_text_cols
= newwidth
;
6067 delayed_size_change
= 1;
6071 /* This size-change overrides any pending one for this frame. */
6072 f
->new_text_lines
= 0;
6073 f
->new_text_cols
= 0;
6075 /* If an argument is zero, set it to the current value. */
6077 newheight
= FRAME_LINES (f
);
6079 newwidth
= FRAME_COLS (f
);
6081 /* Compute width of windows in F.
6082 This is the width of the frame without vertical scroll bars. */
6083 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6085 /* Round up to the smallest acceptable size. */
6086 check_frame_size (f
, &newheight
, &newwidth
);
6088 /* If we're not changing the frame size, quit now. */
6089 if (newheight
== FRAME_LINES (f
)
6090 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6096 /* We only can set screen dimensions to certain values supported
6097 by our video hardware. Try to find the smallest size greater
6098 or equal to the requested dimensions. */
6099 dos_set_window_size (&newheight
, &newwidth
);
6102 if (newheight
!= FRAME_LINES (f
))
6104 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6106 /* Frame has both root and mini-buffer. */
6107 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6108 FRAME_TOP_MARGIN (f
));
6109 set_window_height (FRAME_ROOT_WINDOW (f
),
6112 - FRAME_TOP_MARGIN (f
)),
6114 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6116 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6119 /* Frame has just one top-level window. */
6120 set_window_height (FRAME_ROOT_WINDOW (f
),
6121 newheight
- FRAME_TOP_MARGIN (f
), 0);
6123 if (FRAME_TERMCAP_P (f
) && !pretend
)
6124 FrameRows
= newheight
;
6127 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6129 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6130 if (FRAME_HAS_MINIBUF_P (f
))
6131 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6133 if (FRAME_TERMCAP_P (f
) && !pretend
)
6134 FrameCols
= newwidth
;
6136 if (WINDOWP (f
->tool_bar_window
))
6137 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6140 FRAME_LINES (f
) = newheight
;
6141 SET_FRAME_COLS (f
, newwidth
);
6144 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6145 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6147 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6149 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6150 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6151 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6152 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6156 calculate_costs (f
);
6157 SET_FRAME_GARBAGED (f
);
6162 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6164 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6165 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6166 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6168 unbind_to (count
, Qnil
);
6173 /***********************************************************************
6174 Terminal Related Lisp Functions
6175 ***********************************************************************/
6177 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6178 1, 1, "FOpen termscript file: ",
6179 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6180 FILE = nil means just close any termscript file currently open. */)
6184 if (termscript
!= 0) fclose (termscript
);
6189 file
= Fexpand_file_name (file
, Qnil
);
6190 termscript
= fopen (SDATA (file
), "w");
6191 if (termscript
== 0)
6192 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6198 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6199 Ssend_string_to_terminal
, 1, 1, 0,
6200 doc
: /* Send STRING to the terminal without alteration.
6201 Control characters in STRING will have terminal-dependent effects. */)
6205 /* ??? Perhaps we should do something special for multibyte strings here. */
6206 CHECK_STRING (string
);
6207 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6211 fwrite (SDATA (string
), 1, SBYTES (string
),
6213 fflush (termscript
);
6219 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6220 doc
: /* Beep, or flash the screen.
6221 Also, unless an argument is given,
6222 terminate any keyboard macro currently executing. */)
6245 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6246 error ("Keyboard macro terminated by a command ringing the bell");
6254 /***********************************************************************
6256 ***********************************************************************/
6258 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6259 doc
: /* Pause, without updating display, for SECONDS seconds.
6260 SECONDS may be a floating-point value, meaning that you can wait for a
6261 fraction of a second. Optional second arg MILLISECONDS specifies an
6262 additional wait period, in milliseconds; this may be useful if your
6263 Emacs was built without floating point support.
6264 \(Not all operating systems support waiting for a fraction of a second.) */)
6265 (seconds
, milliseconds
)
6266 Lisp_Object seconds
, milliseconds
;
6270 if (NILP (milliseconds
))
6271 XSETINT (milliseconds
, 0);
6273 CHECK_NUMBER (milliseconds
);
6274 usec
= XINT (milliseconds
) * 1000;
6277 double duration
= extract_float (seconds
);
6278 sec
= (int) duration
;
6279 usec
+= (duration
- sec
) * 1000000;
6282 #ifndef EMACS_HAS_USECS
6283 if (sec
== 0 && usec
!= 0)
6284 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6287 /* Assure that 0 <= usec < 1000000. */
6290 /* We can't rely on the rounding being correct if usec is negative. */
6291 if (-1000000 < usec
)
6292 sec
--, usec
+= 1000000;
6294 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6297 sec
+= usec
/ 1000000, usec
%= 1000000;
6299 if (sec
< 0 || (sec
== 0 && usec
== 0))
6305 XSETFASTINT (zero
, 0);
6306 wait_reading_process_input (sec
, usec
, zero
, 0);
6309 /* We should always have wait_reading_process_input; we have a dummy
6310 implementation for systems which don't support subprocesses. */
6312 /* No wait_reading_process_input */
6319 /* The reason this is done this way
6320 (rather than defined (H_S) && defined (H_T))
6321 is because the VMS preprocessor doesn't grok `defined'. */
6323 EMACS_GET_TIME (end_time
);
6324 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6325 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6329 EMACS_GET_TIME (timeout
);
6330 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6331 if (EMACS_TIME_NEG_P (timeout
)
6332 || !select (1, 0, 0, 0, &timeout
))
6335 #else /* not HAVE_SELECT */
6337 #endif /* HAVE_SELECT */
6338 #endif /* not VMS */
6341 #endif /* no subprocesses */
6347 /* This is just like wait_reading_process_input, except that
6348 it does the redisplay.
6350 It's also much like Fsit_for, except that it can be used for
6351 waiting for input as well. */
6354 sit_for (sec
, usec
, reading
, display
, initial_display
)
6355 int sec
, usec
, reading
, display
, initial_display
;
6357 Lisp_Object read_kbd
;
6359 swallow_events (display
);
6361 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6364 if (initial_display
)
6365 redisplay_preserve_echo_area (2);
6367 if (sec
== 0 && usec
== 0)
6374 XSETINT (read_kbd
, reading
? -1 : 1);
6375 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6377 return detect_input_pending () ? Qnil
: Qt
;
6381 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6382 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6383 SECONDS may be a floating-point value, meaning that you can wait for a
6384 fraction of a second.
6385 \(Not all operating systems support waiting for a fraction of a second.)
6386 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6387 Redisplay is preempted as always if input arrives, and does not happen
6388 if input is available before it starts.
6389 Value is t if waited the full time with no input arriving.
6391 An obsolete but still supported form is
6392 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6393 Where the optional arg MILLISECONDS specifies an additional wait period,
6394 in milliseconds; this was useful when Emacs was built without
6395 floating point support.
6396 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6398 /* The `old-nodisp' stuff is there so that the arglist has the correct
6399 length. Otherwise, `defdvice' will redefine it with fewer args. */
6400 (seconds
, milliseconds
, nodisp
)
6401 Lisp_Object seconds
, milliseconds
, nodisp
;
6405 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6407 nodisp
= milliseconds
;
6408 milliseconds
= Qnil
;
6411 if (NILP (milliseconds
))
6412 XSETINT (milliseconds
, 0);
6414 CHECK_NUMBER (milliseconds
);
6415 usec
= XINT (milliseconds
) * 1000;
6418 double duration
= extract_float (seconds
);
6419 sec
= (int) duration
;
6420 usec
+= (duration
- sec
) * 1000000;
6423 #ifndef EMACS_HAS_USECS
6424 if (usec
!= 0 && sec
== 0)
6425 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6428 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6433 /***********************************************************************
6434 Other Lisp Functions
6435 ***********************************************************************/
6437 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6438 session's frames, frame names, buffers, buffer-read-only flags, and
6439 buffer-modified-flags, and a trailing sentinel (so we don't need to
6440 add length checks). */
6442 static Lisp_Object frame_and_buffer_state
;
6445 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6446 Sframe_or_buffer_changed_p
, 0, 0, 0,
6447 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6448 The state variable is an internal vector containing all frames and buffers,
6449 aside from buffers whose names start with space,
6450 along with the buffers' read-only and modified flags, which allows a fast
6451 check to see whether the menu bars might need to be recomputed.
6452 If this function returns non-nil, it updates the internal vector to reflect
6453 the current state. */)
6456 Lisp_Object tail
, frame
, buf
;
6460 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6461 FOR_EACH_FRAME (tail
, frame
)
6463 if (!EQ (*vecp
++, frame
))
6465 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6468 /* Check that the buffer info matches.
6469 No need to test for the end of the vector
6470 because the last element of the vector is lambda
6471 and that will always cause a mismatch. */
6472 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6474 buf
= XCDR (XCAR (tail
));
6475 /* Ignore buffers that aren't included in buffer lists. */
6476 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6478 if (!EQ (*vecp
++, buf
))
6480 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6482 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6485 /* Detect deletion of a buffer at the end of the list. */
6486 if (EQ (*vecp
, Qlambda
))
6489 /* Start with 1 so there is room for at least one lambda at the end. */
6491 FOR_EACH_FRAME (tail
, frame
)
6493 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6495 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6496 if (n
> XVECTOR (frame_and_buffer_state
)->size
6497 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6498 /* Add 20 extra so we grow it less often. */
6499 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6500 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6501 FOR_EACH_FRAME (tail
, frame
)
6504 *vecp
++ = XFRAME (frame
)->name
;
6506 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6508 buf
= XCDR (XCAR (tail
));
6509 /* Ignore buffers that aren't included in buffer lists. */
6510 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6513 *vecp
++ = XBUFFER (buf
)->read_only
;
6514 *vecp
++ = Fbuffer_modified_p (buf
);
6516 /* Fill up the vector with lambdas (always at least one). */
6518 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6519 < XVECTOR (frame_and_buffer_state
)->size
)
6521 /* Make sure we didn't overflow the vector. */
6522 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6523 > XVECTOR (frame_and_buffer_state
)->size
)
6530 /***********************************************************************
6532 ***********************************************************************/
6534 char *terminal_type
;
6536 /* Initialization done when Emacs fork is started, before doing stty.
6537 Determine terminal type and set terminal_driver. Then invoke its
6538 decoding routine to set up variables in the terminal package. */
6543 #ifdef HAVE_X_WINDOWS
6544 extern int display_arg
;
6547 /* Construct the space glyph. */
6548 space_glyph
.type
= CHAR_GLYPH
;
6549 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6550 space_glyph
.charpos
= -1;
6554 cursor_in_echo_area
= 0;
6555 terminal_type
= (char *) 0;
6557 /* Now is the time to initialize this; it's used by init_sys_modes
6559 Vwindow_system
= Qnil
;
6561 /* If the user wants to use a window system, we shouldn't bother
6562 initializing the terminal. This is especially important when the
6563 terminal is so dumb that emacs gives up before and doesn't bother
6564 using the window system.
6566 If the DISPLAY environment variable is set and nonempty,
6567 try to use X, and die with an error message if that doesn't work. */
6569 #ifdef HAVE_X_WINDOWS
6574 display
= getenv ("DECW$DISPLAY");
6576 display
= getenv ("DISPLAY");
6579 display_arg
= (display
!= 0 && *display
!= 0);
6582 if (!inhibit_window_system
&& display_arg
6588 Vwindow_system
= intern ("x");
6590 Vwindow_system_version
= make_number (11);
6592 Vwindow_system_version
= make_number (10);
6594 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6595 /* In some versions of ncurses,
6596 tputs crashes if we have not called tgetent.
6598 { char b
[2044]; tgetent (b
, "xterm");}
6600 adjust_frame_glyphs_initially ();
6603 #endif /* HAVE_X_WINDOWS */
6606 if (!inhibit_window_system
)
6608 Vwindow_system
= intern ("w32");
6609 Vwindow_system_version
= make_number (1);
6610 adjust_frame_glyphs_initially ();
6613 #endif /* HAVE_NTGUI */
6616 if (!inhibit_window_system
)
6618 Vwindow_system
= intern ("mac");
6619 Vwindow_system_version
= make_number (1);
6620 adjust_frame_glyphs_initially ();
6625 /* If no window system has been specified, try to use the terminal. */
6628 fatal ("standard input is not a tty");
6632 /* Look at the TERM variable. */
6633 terminal_type
= (char *) getenv ("TERM");
6637 fprintf (stderr
, "Please specify your terminal type.\n\
6638 For types defined in VMS, use set term /device=TYPE.\n\
6639 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6640 \(The quotation marks are necessary since terminal types are lower case.)\n");
6642 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6648 /* VMS DCL tends to up-case things, so down-case term type.
6649 Hardly any uppercase letters in terminal types; should be none. */
6651 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6654 strcpy (new, terminal_type
);
6656 for (p
= new; *p
; p
++)
6660 terminal_type
= new;
6664 term_init (terminal_type
);
6667 struct frame
*sf
= SELECTED_FRAME ();
6668 int width
= FRAME_TOTAL_COLS (sf
);
6669 int height
= FRAME_LINES (sf
);
6671 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6673 /* If these sizes are so big they cause overflow, just ignore the
6674 change. It's not clear what better we could do. */
6675 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6676 fatal ("screen size %dx%d too big", width
, height
);
6679 adjust_frame_glyphs_initially ();
6680 calculate_costs (XFRAME (selected_frame
));
6685 #endif /* CANNOT_DUMP */
6686 signal (SIGWINCH
, window_change_signal
);
6687 #endif /* SIGWINCH */
6689 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6693 /* The MSDOS terminal turns on its ``window system'' relatively
6694 late into the startup, so we cannot do the frame faces'
6695 initialization just yet. It will be done later by pc-win.el
6696 and internal_terminal_init. */
6697 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6699 && NILP (Vwindow_system
))
6701 /* For the initial frame, we don't have any way of knowing what
6702 are the foreground and background colors of the terminal. */
6703 struct frame
*sf
= SELECTED_FRAME();
6705 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6706 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6707 call0 (intern ("tty-set-up-initial-frame-faces"));
6713 /***********************************************************************
6715 ***********************************************************************/
6717 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6718 Sinternal_show_cursor
, 2, 2, 0,
6719 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6720 WINDOW nil means use the selected window. SHOW non-nil means
6721 show a cursor in WINDOW in the next redisplay. SHOW nil means
6722 don't show a cursor. */)
6724 Lisp_Object window
, show
;
6726 /* Don't change cursor state while redisplaying. This could confuse
6728 if (!redisplaying_p
)
6731 window
= selected_window
;
6733 CHECK_WINDOW (window
);
6735 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6742 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6743 Sinternal_show_cursor_p
, 0, 1, 0,
6744 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6745 WINDOW nil or omitted means report on the selected window. */)
6752 window
= selected_window
;
6754 CHECK_WINDOW (window
);
6756 w
= XWINDOW (window
);
6757 return w
->cursor_off_p
? Qnil
: Qt
;
6761 /***********************************************************************
6763 ***********************************************************************/
6768 defsubr (&Sredraw_frame
);
6769 defsubr (&Sredraw_display
);
6770 defsubr (&Sframe_or_buffer_changed_p
);
6771 defsubr (&Sopen_termscript
);
6773 defsubr (&Ssit_for
);
6774 defsubr (&Ssleep_for
);
6775 defsubr (&Ssend_string_to_terminal
);
6776 defsubr (&Sinternal_show_cursor
);
6777 defsubr (&Sinternal_show_cursor_p
);
6780 defsubr (&Sdump_redisplay_history
);
6783 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6784 staticpro (&frame_and_buffer_state
);
6786 Qdisplay_table
= intern ("display-table");
6787 staticpro (&Qdisplay_table
);
6788 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6789 staticpro (&Qredisplay_dont_pause
);
6791 DEFVAR_INT ("baud-rate", &baud_rate
,
6792 doc
: /* *The output baud rate of the terminal.
6793 On most systems, changing this value will affect the amount of padding
6794 and the other strategic decisions made during redisplay. */);
6796 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6797 doc
: /* *Non-nil means invert the entire frame display.
6798 This means everything is in inverse video which otherwise would not be. */);
6800 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6801 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6803 See also `ring-bell-function'. */);
6805 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6806 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6807 A non-nil value is useful if the terminal can automatically preserve
6808 Emacs's frame display when you reenter Emacs.
6809 It is up to you to set this variable if your terminal can do that. */);
6811 DEFVAR_LISP ("window-system", &Vwindow_system
,
6812 doc
: /* Name of window system that Emacs is displaying through.
6813 The value is a symbol--for instance, `x' for X windows.
6814 The value is nil if Emacs is using a text-only terminal. */);
6816 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6817 doc
: /* The version number of the window system in use.
6818 For X windows, this is 10 or 11. */);
6820 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6821 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6823 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6824 doc
: /* Table defining how to output a glyph code to the frame.
6825 If not nil, this is a vector indexed by glyph code to define the glyph.
6826 Each element can be:
6827 integer: a glyph code which this glyph is an alias for.
6828 string: output this glyph using that string (not impl. in X windows).
6829 nil: this glyph mod 524288 is the code of a character to output,
6830 and this glyph / 524288 is the face number (see `face-id') to use
6831 while outputting it. */);
6832 Vglyph_table
= Qnil
;
6834 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6835 doc
: /* Display table to use for buffers that specify none.
6836 See `buffer-display-table' for more information. */);
6837 Vstandard_display_table
= Qnil
;
6839 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6840 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6841 redisplay_dont_pause
= 0;
6843 /* Initialize `window-system', unless init_display already decided it. */
6848 Vwindow_system
= Qnil
;
6849 Vwindow_system_version
= Qnil
;
6853 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6854 (do not change this comment) */