1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,03,04
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 #ifdef HAVE_WINDOW_SYSTEM
3659 update_window_fringes (w
, 0);
3663 rif
->update_window_end_hook (w
, 1, 0);
3668 TRACE ((stderr
, "direct output for insert\n"));
3669 mark_window_display_accurate (it
.window
, 1);
3670 redisplay_performed_directly_p
= 1;
3675 /* Perform a direct display update for moving PT by N positions
3676 left or right. N < 0 means a movement backwards. This function
3677 is currently only called for N == 1 or N == -1. */
3680 direct_output_forward_char (n
)
3683 struct frame
*f
= SELECTED_FRAME ();
3684 struct window
*w
= XWINDOW (selected_window
);
3685 struct glyph_row
*row
;
3687 /* Give up if point moved out of or into a composition. */
3688 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3689 current_buffer
, PT
))
3692 /* Give up if face attributes have been changed. */
3693 if (face_change_count
)
3696 /* Give up if current matrix is not up to date or we are
3697 displaying a message. */
3698 if (!display_completed
|| cursor_in_echo_area
)
3701 /* Give up if the buffer's direction is reversed. */
3702 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3705 /* Can't use direct output if highlighting a region. */
3706 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3709 /* Can't use direct output if highlighting trailing whitespace. */
3710 if (!NILP (Vshow_trailing_whitespace
))
3713 /* Give up if we are showing a message or just cleared the message
3714 because we might need to resize the echo area window. */
3715 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3718 /* Give up if currently displaying a message instead of the
3719 minibuffer contents. */
3720 if (XWINDOW (minibuf_window
) == w
3721 && EQ (minibuf_window
, echo_area_window
))
3724 /* Give up if we don't know where the cursor is. */
3725 if (w
->cursor
.vpos
< 0)
3728 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3730 /* Give up if PT is outside of the last known cursor row. */
3731 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3732 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3735 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3737 w
->last_cursor
= w
->cursor
;
3738 XSETFASTINT (w
->last_point
, PT
);
3740 xassert (w
->cursor
.hpos
>= 0
3741 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3743 if (FRAME_WINDOW_P (f
))
3744 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3745 w
->cursor
.y
, w
->cursor
.x
);
3749 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3750 + (INTEGERP (w
->left_margin_cols
)
3751 ? XFASTINT (w
->left_margin_cols
)
3753 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3758 redisplay_performed_directly_p
= 1;
3764 /***********************************************************************
3766 ***********************************************************************/
3768 /* Update frame F based on the data in desired matrices.
3770 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3771 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3774 Value is non-zero if redisplay was stopped due to pending input. */
3777 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3780 int inhibit_hairy_id_p
;
3782 /* 1 means display has been paused because of pending input. */
3784 struct window
*root_window
= XWINDOW (f
->root_window
);
3786 if (FRAME_WINDOW_P (f
))
3788 /* We are working on window matrix basis. All windows whose
3789 flag must_be_updated_p is set have to be updated. */
3791 /* Record that we are not working on frame matrices. */
3792 set_frame_matrix_frame (NULL
);
3794 /* Update all windows in the window tree of F, maybe stopping
3795 when pending input is detected. */
3798 /* Update the menu bar on X frames that don't have toolkit
3800 if (WINDOWP (f
->menu_bar_window
))
3801 update_window (XWINDOW (f
->menu_bar_window
), 1);
3803 /* Update the tool-bar window, if present. */
3804 if (WINDOWP (f
->tool_bar_window
))
3806 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3808 /* Update tool-bar window. */
3809 if (w
->must_be_updated_p
)
3813 update_window (w
, 1);
3814 w
->must_be_updated_p
= 0;
3816 /* Swap tool-bar strings. We swap because we want to
3818 tem
= f
->current_tool_bar_string
;
3819 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3820 f
->desired_tool_bar_string
= tem
;
3825 /* Update windows. */
3826 paused_p
= update_window_tree (root_window
, force_p
);
3829 #if 0 /* This flush is a performance bottleneck under X,
3830 and it doesn't seem to be necessary anyway. */
3831 rif
->flush_display (f
);
3836 /* We are working on frame matrix basis. Set the frame on whose
3837 frame matrix we operate. */
3838 set_frame_matrix_frame (f
);
3840 /* Build F's desired matrix from window matrices. */
3841 build_frame_matrix (f
);
3843 /* Update the display */
3845 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3849 fflush (termscript
);
3852 /* Check window matrices for lost pointers. */
3854 check_window_matrix_pointers (root_window
);
3855 add_frame_display_history (f
, paused_p
);
3859 /* Reset flags indicating that a window should be updated. */
3860 set_window_update_flags (root_window
, 0);
3862 display_completed
= !paused_p
;
3868 /************************************************************************
3869 Window-based updates
3870 ************************************************************************/
3872 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3873 don't stop updating when input is pending. */
3876 update_window_tree (w
, force_p
)
3882 while (w
&& !paused_p
)
3884 if (!NILP (w
->hchild
))
3885 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3886 else if (!NILP (w
->vchild
))
3887 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3888 else if (w
->must_be_updated_p
)
3889 paused_p
|= update_window (w
, force_p
);
3891 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3898 /* Update window W if its flag must_be_updated_p is non-zero. If
3899 FORCE_P is non-zero, don't stop updating if input is pending. */
3902 update_single_window (w
, force_p
)
3906 if (w
->must_be_updated_p
)
3908 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3910 /* Record that this is not a frame-based redisplay. */
3911 set_frame_matrix_frame (NULL
);
3915 update_window (w
, force_p
);
3918 /* Reset flag in W. */
3919 w
->must_be_updated_p
= 0;
3924 /* Redraw lines from the current matrix of window W that are
3925 overlapped by other rows. YB is bottom-most y-position in W. */
3928 redraw_overlapped_rows (w
, yb
)
3934 /* If rows overlapping others have been changed, the rows being
3935 overlapped have to be redrawn. This won't draw lines that have
3936 already been drawn in update_window_line because overlapped_p in
3937 desired rows is 0, so after row assignment overlapped_p in
3938 current rows is 0. */
3939 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3941 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3943 if (!row
->enabled_p
)
3945 else if (row
->mode_line_p
)
3948 if (row
->overlapped_p
)
3950 enum glyph_row_area area
;
3952 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3955 updated_area
= area
;
3956 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3957 if (row
->used
[area
])
3958 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3959 rif
->clear_end_of_line (-1);
3962 row
->overlapped_p
= 0;
3965 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3971 /* Redraw lines from the current matrix of window W that overlap
3972 others. YB is bottom-most y-position in W. */
3975 redraw_overlapping_rows (w
, yb
)
3980 struct glyph_row
*row
;
3982 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3984 row
= w
->current_matrix
->rows
+ i
;
3986 if (!row
->enabled_p
)
3988 else if (row
->mode_line_p
)
3991 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3993 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3995 if (row
->used
[LEFT_MARGIN_AREA
])
3996 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3998 if (row
->used
[TEXT_AREA
])
3999 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
4001 if (row
->used
[RIGHT_MARGIN_AREA
])
4002 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
4004 /* Record in neighbour rows that ROW overwrites part of their
4006 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4007 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4008 if ((row
->phys_height
- row
->phys_ascent
4009 > row
->height
- row
->ascent
)
4011 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4022 /* Check that no row in the current matrix of window W is enabled
4023 which is below what's displayed in the window. */
4026 check_current_matrix_flags (w
)
4029 int last_seen_p
= 0;
4030 int i
, yb
= window_text_bottom_y (w
);
4032 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4034 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4035 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4037 else if (last_seen_p
&& row
->enabled_p
)
4042 #endif /* GLYPH_DEBUG */
4045 /* Update display of window W. FORCE_P non-zero means that we should
4046 not stop when detecting pending input. */
4049 update_window (w
, force_p
)
4053 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4055 int preempt_count
= baud_rate
/ 2400 + 1;
4056 extern int input_pending
;
4057 extern Lisp_Object do_mouse_tracking
;
4059 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4062 /* Check that W's frame doesn't have glyph matrices. */
4063 xassert (FRAME_WINDOW_P (f
));
4064 xassert (updating_frame
!= NULL
);
4066 /* Check pending input the first time so that we can quickly return. */
4067 if (redisplay_dont_pause
)
4070 detect_input_pending ();
4072 /* If forced to complete the update, or if no input is pending, do
4074 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4076 struct glyph_row
*row
, *end
;
4077 struct glyph_row
*mode_line_row
;
4078 struct glyph_row
*header_line_row
;
4079 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4081 rif
->update_window_begin_hook (w
);
4082 yb
= window_text_bottom_y (w
);
4084 /* If window has a header line, update it before everything else.
4085 Adjust y-positions of other rows by the header line height. */
4086 row
= desired_matrix
->rows
;
4087 end
= row
+ desired_matrix
->nrows
- 1;
4089 if (row
->mode_line_p
)
4091 header_line_row
= row
;
4095 header_line_row
= NULL
;
4097 /* Update the mode line, if necessary. */
4098 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4099 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4101 mode_line_row
->y
= yb
;
4102 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4104 &mouse_face_overwritten_p
);
4108 /* Find first enabled row. Optimizations in redisplay_internal
4109 may lead to an update with only one row enabled. There may
4110 be also completely empty matrices. */
4111 while (row
< end
&& !row
->enabled_p
)
4114 /* Try reusing part of the display by copying. */
4115 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4117 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4120 /* All rows were found to be equal. */
4125 /* We've scrolled the display. */
4130 /* Update the header line after scrolling because a new header
4131 line would otherwise overwrite lines at the top of the window
4132 that can be scrolled. */
4133 if (header_line_row
&& header_line_row
->enabled_p
)
4135 header_line_row
->y
= 0;
4136 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4140 /* Update the rest of the lines. */
4141 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4144 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4147 /* We'll have to play a little bit with when to
4148 detect_input_pending. If it's done too often,
4149 scrolling large windows with repeated scroll-up
4150 commands will too quickly pause redisplay. */
4151 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4152 detect_input_pending ();
4154 changed_p
|= update_window_line (w
, vpos
,
4155 &mouse_face_overwritten_p
);
4157 /* Mark all rows below the last visible one in the current
4158 matrix as invalid. This is necessary because of
4159 variable line heights. Consider the case of three
4160 successive redisplays, where the first displays 5
4161 lines, the second 3 lines, and the third 5 lines again.
4162 If the second redisplay wouldn't mark rows in the
4163 current matrix invalid, the third redisplay might be
4164 tempted to optimize redisplay based on lines displayed
4165 in the first redisplay. */
4166 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4167 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4168 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4171 /* Was display preempted? */
4172 paused_p
= row
< end
;
4176 /* Fix the appearance of overlapping/overlapped rows. */
4177 if (!paused_p
&& !w
->pseudo_window_p
)
4179 if (changed_p
&& rif
->fix_overlapping_area
)
4181 redraw_overlapped_rows (w
, yb
);
4182 redraw_overlapping_rows (w
, yb
);
4185 /* Make cursor visible at cursor position of W. */
4186 set_window_cursor_after_update (w
);
4188 #if 0 /* Check that current matrix invariants are satisfied. This is
4189 for debugging only. See the comment of check_matrix_invariants. */
4190 IF_DEBUG (check_matrix_invariants (w
));
4195 /* Remember the redisplay method used to display the matrix. */
4196 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4199 #ifdef HAVE_WINDOW_SYSTEM
4200 update_window_fringes (w
, 0);
4203 /* End the update of window W. Don't set the cursor if we
4204 paused updating the display because in this case,
4205 set_window_cursor_after_update hasn't been called, and
4206 output_cursor doesn't contain the cursor location. */
4207 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4213 /* check_current_matrix_flags (w); */
4214 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4217 clear_glyph_matrix (desired_matrix
);
4223 /* Update the display of area AREA in window W, row number VPOS.
4224 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4227 update_marginal_area (w
, area
, vpos
)
4231 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4233 /* Let functions in xterm.c know what area subsequent X positions
4234 will be relative to. */
4235 updated_area
= area
;
4237 /* Set cursor to start of glyphs, write them, and clear to the end
4238 of the area. I don't think that something more sophisticated is
4239 necessary here, since marginal areas will not be the default. */
4240 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4241 if (desired_row
->used
[area
])
4242 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4243 rif
->clear_end_of_line (-1);
4247 /* Update the display of the text area of row VPOS in window W.
4248 Value is non-zero if display has changed. */
4251 update_text_area (w
, vpos
)
4255 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4256 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4259 /* Let functions in xterm.c know what area subsequent X positions
4260 will be relative to. */
4261 updated_area
= TEXT_AREA
;
4263 /* If rows are at different X or Y, or rows have different height,
4264 or the current row is marked invalid, write the entire line. */
4265 if (!current_row
->enabled_p
4266 || desired_row
->y
!= current_row
->y
4267 || desired_row
->ascent
!= current_row
->ascent
4268 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4269 || desired_row
->phys_height
!= current_row
->phys_height
4270 || desired_row
->visible_height
!= current_row
->visible_height
4271 || current_row
->overlapped_p
4272 || current_row
->mouse_face_p
4273 || current_row
->x
!= desired_row
->x
)
4275 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4277 if (desired_row
->used
[TEXT_AREA
])
4278 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4279 desired_row
->used
[TEXT_AREA
]);
4281 /* Clear to end of window. */
4282 rif
->clear_end_of_line (-1);
4285 /* This erases the cursor. We do this here because
4286 notice_overwritten_cursor cannot easily check this, which
4287 might indicate that the whole functionality of
4288 notice_overwritten_cursor would better be implemented here.
4289 On the other hand, we need notice_overwritten_cursor as long
4290 as mouse highlighting is done asynchronously outside of
4292 if (vpos
== w
->phys_cursor
.vpos
)
4293 w
->phys_cursor_on_p
= 0;
4298 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4299 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4300 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4301 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4303 /* If the desired row extends its face to the text area end,
4304 make sure we write at least one glyph, so that the face
4305 extension actually takes place. */
4306 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4309 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4313 /* Loop over glyphs that current and desired row may have
4319 /* Skip over glyphs that both rows have in common. These
4320 don't have to be written. We can't skip if the last
4321 current glyph overlaps the glyph to its right. For
4322 example, consider a current row of `if ' with the `f' in
4323 Courier bold so that it overlaps the ` ' to its right.
4324 If the desired row is ` ', we would skip over the space
4325 after the `if' and there would remain a pixel from the
4326 `f' on the screen. */
4327 if (overlapping_glyphs_p
&& i
> 0)
4329 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4332 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4334 can_skip_p
= right
== 0;
4340 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4342 x
+= desired_glyph
->pixel_width
;
4343 ++desired_glyph
, ++current_glyph
, ++i
;
4346 /* Consider the case that the current row contains "xxx
4347 ppp ggg" in italic Courier font, and the desired row
4348 is "xxx ggg". The character `p' has lbearing, `g'
4349 has not. The loop above will stop in front of the
4350 first `p' in the current row. If we would start
4351 writing glyphs there, we wouldn't erase the lbearing
4352 of the `p'. The rest of the lbearing problem is then
4353 taken care of by draw_glyphs. */
4354 if (overlapping_glyphs_p
4356 && i
< current_row
->used
[TEXT_AREA
]
4357 && (current_row
->used
[TEXT_AREA
]
4358 != desired_row
->used
[TEXT_AREA
]))
4362 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4364 while (left
> 0 && i
> 0)
4366 --i
, --desired_glyph
, --current_glyph
;
4367 x
-= desired_glyph
->pixel_width
;
4368 left
-= desired_glyph
->pixel_width
;
4373 /* Try to avoid writing the entire rest of the desired row
4374 by looking for a resync point. This mainly prevents
4375 mode line flickering in the case the mode line is in
4376 fixed-pitch font, which it usually will be. */
4377 if (i
< desired_row
->used
[TEXT_AREA
])
4379 int start_x
= x
, start_hpos
= i
;
4380 struct glyph
*start
= desired_glyph
;
4382 int skip_first_p
= !can_skip_p
;
4384 /* Find the next glyph that's equal again. */
4387 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4390 x
+= desired_glyph
->pixel_width
;
4391 current_x
+= current_glyph
->pixel_width
;
4392 ++desired_glyph
, ++current_glyph
, ++i
;
4396 if (i
== start_hpos
|| x
!= current_x
)
4400 desired_glyph
= start
;
4404 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4405 rif
->write_glyphs (start
, i
- start_hpos
);
4410 /* Write the rest. */
4411 if (i
< desired_row
->used
[TEXT_AREA
])
4413 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4414 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4418 /* Maybe clear to end of line. */
4419 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4421 /* If new row extends to the end of the text area, nothing
4422 has to be cleared, if and only if we did a write_glyphs
4423 above. This is made sure by setting desired_stop_pos
4424 appropriately above. */
4425 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4427 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4429 /* If old row extends to the end of the text area, clear. */
4430 if (i
>= desired_row
->used
[TEXT_AREA
])
4431 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4432 desired_row
->pixel_width
);
4433 rif
->clear_end_of_line (-1);
4436 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4438 /* Otherwise clear to the end of the old row. Everything
4439 after that position should be clear already. */
4442 if (i
>= desired_row
->used
[TEXT_AREA
])
4443 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4444 desired_row
->pixel_width
);
4446 /* If cursor is displayed at the end of the line, make sure
4447 it's cleared. Nowadays we don't have a phys_cursor_glyph
4448 with which to erase the cursor (because this method
4449 doesn't work with lbearing/rbearing), so we must do it
4451 if (vpos
== w
->phys_cursor
.vpos
4452 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4454 w
->phys_cursor_on_p
= 0;
4458 x
= current_row
->pixel_width
;
4459 rif
->clear_end_of_line (x
);
4468 /* Update row VPOS in window W. Value is non-zero if display has been
4472 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4474 int vpos
, *mouse_face_overwritten_p
;
4476 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4477 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4480 /* Set the row being updated. This is important to let xterm.c
4481 know what line height values are in effect. */
4482 updated_row
= desired_row
;
4484 /* A row can be completely invisible in case a desired matrix was
4485 built with a vscroll and then make_cursor_line_fully_visible shifts
4486 the matrix. Make sure to make such rows current anyway, since
4487 we need the correct y-position, for example, in the current matrix. */
4488 if (desired_row
->mode_line_p
4489 || desired_row
->visible_height
> 0)
4491 xassert (desired_row
->enabled_p
);
4493 /* Update display of the left margin area, if there is one. */
4494 if (!desired_row
->full_width_p
4495 && !NILP (w
->left_margin_cols
))
4498 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4501 /* Update the display of the text area. */
4502 if (update_text_area (w
, vpos
))
4505 if (current_row
->mouse_face_p
)
4506 *mouse_face_overwritten_p
= 1;
4509 /* Update display of the right margin area, if there is one. */
4510 if (!desired_row
->full_width_p
4511 && !NILP (w
->right_margin_cols
))
4514 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4517 /* Draw truncation marks etc. */
4518 if (!current_row
->enabled_p
4519 || desired_row
->y
!= current_row
->y
4520 || desired_row
->visible_height
!= current_row
->visible_height
4521 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4522 || current_row
->redraw_fringe_bitmaps_p
4523 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4524 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4525 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4526 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4527 rif
->after_update_window_line_hook (desired_row
);
4530 /* Update current_row from desired_row. */
4531 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4537 /* Set the cursor after an update of window W. This function may only
4538 be called from update_window. */
4541 set_window_cursor_after_update (w
)
4544 struct frame
*f
= XFRAME (w
->frame
);
4545 int cx
, cy
, vpos
, hpos
;
4547 /* Not intended for frame matrix updates. */
4548 xassert (FRAME_WINDOW_P (f
));
4550 if (cursor_in_echo_area
4551 && !NILP (echo_area_buffer
[0])
4552 /* If we are showing a message instead of the mini-buffer,
4553 show the cursor for the message instead. */
4554 && XWINDOW (minibuf_window
) == w
4555 && EQ (minibuf_window
, echo_area_window
)
4556 /* These cases apply only to the frame that contains
4557 the active mini-buffer window. */
4558 && FRAME_HAS_MINIBUF_P (f
)
4559 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4561 cx
= cy
= vpos
= hpos
= 0;
4563 if (cursor_in_echo_area
>= 0)
4565 /* If the mini-buffer is several lines high, find the last
4566 line that has any text on it. Note: either all lines
4567 are enabled or none. Otherwise we wouldn't be able to
4569 struct glyph_row
*row
, *last_row
;
4570 struct glyph
*glyph
;
4571 int yb
= window_text_bottom_y (w
);
4574 row
= w
->current_matrix
->rows
;
4575 while (row
->enabled_p
4576 && (last_row
== NULL
4577 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4579 if (row
->used
[TEXT_AREA
]
4580 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4587 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4588 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4590 while (last
> start
&& last
->charpos
< 0)
4593 for (glyph
= start
; glyph
< last
; ++glyph
)
4595 cx
+= glyph
->pixel_width
;
4600 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4608 hpos
= w
->cursor
.hpos
;
4609 vpos
= w
->cursor
.vpos
;
4612 /* Window cursor can be out of sync for horizontally split windows. */
4613 hpos
= max (0, hpos
);
4614 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4615 vpos
= max (0, vpos
);
4616 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4617 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4621 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4622 tree rooted at W. */
4625 set_window_update_flags (w
, on_p
)
4631 if (!NILP (w
->hchild
))
4632 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4633 else if (!NILP (w
->vchild
))
4634 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4636 w
->must_be_updated_p
= on_p
;
4638 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4644 /***********************************************************************
4645 Window-Based Scrolling
4646 ***********************************************************************/
4648 /* Structure describing rows in scrolling_window. */
4652 /* Number of occurrences of this row in desired and current matrix. */
4653 int old_uses
, new_uses
;
4655 /* Vpos of row in new matrix. */
4656 int new_line_number
;
4658 /* Bucket index of this row_entry in the hash table row_table. */
4661 /* The row described by this entry. */
4662 struct glyph_row
*row
;
4664 /* Hash collision chain. */
4665 struct row_entry
*next
;
4668 /* A pool to allocate row_entry structures from, and the size of the
4669 pool. The pool is reallocated in scrolling_window when we find
4670 that we need a larger one. */
4672 static struct row_entry
*row_entry_pool
;
4673 static int row_entry_pool_size
;
4675 /* Index of next free entry in row_entry_pool. */
4677 static int row_entry_idx
;
4679 /* The hash table used during scrolling, and the table's size. This
4680 table is used to quickly identify equal rows in the desired and
4683 static struct row_entry
**row_table
;
4684 static int row_table_size
;
4686 /* Vectors of pointers to row_entry structures belonging to the
4687 current and desired matrix, and the size of the vectors. */
4689 static struct row_entry
**old_lines
, **new_lines
;
4690 static int old_lines_size
, new_lines_size
;
4692 /* A pool to allocate run structures from, and its size. */
4694 static struct run
*run_pool
;
4695 static int runs_size
;
4697 /* A vector of runs of lines found during scrolling. */
4699 static struct run
**runs
;
4701 /* Add glyph row ROW to the scrolling hash table during the scrolling
4704 static INLINE
struct row_entry
*
4705 add_row_entry (w
, row
)
4707 struct glyph_row
*row
;
4709 struct row_entry
*entry
;
4710 int i
= row
->hash
% row_table_size
;
4712 entry
= row_table
[i
];
4713 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4714 entry
= entry
->next
;
4718 entry
= row_entry_pool
+ row_entry_idx
++;
4720 entry
->old_uses
= entry
->new_uses
= 0;
4721 entry
->new_line_number
= 0;
4723 entry
->next
= row_table
[i
];
4724 row_table
[i
] = entry
;
4731 /* Try to reuse part of the current display of W by scrolling lines.
4732 HEADER_LINE_P non-zero means W has a header line.
4734 The algorithm is taken from Communications of the ACM, Apr78 "A
4735 Technique for Isolating Differences Between Files." It should take
4738 A short outline of the steps of the algorithm
4740 1. Skip lines equal at the start and end of both matrices.
4742 2. Enter rows in the current and desired matrix into a symbol
4743 table, counting how often they appear in both matrices.
4745 3. Rows that appear exactly once in both matrices serve as anchors,
4746 i.e. we assume that such lines are likely to have been moved.
4748 4. Starting from anchor lines, extend regions to be scrolled both
4749 forward and backward.
4753 -1 if all rows were found to be equal.
4754 0 to indicate that we did not scroll the display, or
4755 1 if we did scroll. */
4758 scrolling_window (w
, header_line_p
)
4762 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4763 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4764 int yb
= window_text_bottom_y (w
);
4765 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4766 int nruns
, nbytes
, n
, run_idx
;
4767 struct row_entry
*entry
;
4769 /* Skip over rows equal at the start. */
4770 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4772 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4773 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4777 && !d
->redraw_fringe_bitmaps_p
4779 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4780 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4781 && row_equal_p (w
, c
, d
, 1))
4790 /* Give up if some rows in the desired matrix are not enabled. */
4791 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4794 first_old
= first_new
= i
;
4796 /* Set last_new to the index + 1 of the last enabled row in the
4799 while (i
< desired_matrix
->nrows
- 1
4800 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4801 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4804 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4809 /* Set last_old to the index + 1 of the last enabled row in the
4810 current matrix. We don't look at the enabled flag here because
4811 we plan to reuse part of the display even if other parts are
4814 while (i
< current_matrix
->nrows
- 1)
4816 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4825 /* Skip over rows equal at the bottom. */
4828 while (i
- 1 > first_new
4829 && j
- 1 > first_old
4830 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4831 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4832 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4833 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4835 MATRIX_ROW (desired_matrix
, i
- 1),
4836 MATRIX_ROW (current_matrix
, j
- 1), 1))
4841 /* Nothing to do if all rows are equal. */
4842 if (last_new
== first_new
)
4845 /* Reallocate vectors, tables etc. if necessary. */
4847 if (current_matrix
->nrows
> old_lines_size
)
4849 old_lines_size
= current_matrix
->nrows
;
4850 nbytes
= old_lines_size
* sizeof *old_lines
;
4851 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4854 if (desired_matrix
->nrows
> new_lines_size
)
4856 new_lines_size
= desired_matrix
->nrows
;
4857 nbytes
= new_lines_size
* sizeof *new_lines
;
4858 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4861 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4862 if (3 * n
> row_table_size
)
4864 row_table_size
= next_almost_prime (3 * n
);
4865 nbytes
= row_table_size
* sizeof *row_table
;
4866 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4867 bzero (row_table
, nbytes
);
4870 if (n
> row_entry_pool_size
)
4872 row_entry_pool_size
= n
;
4873 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4874 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4877 if (desired_matrix
->nrows
> runs_size
)
4879 runs_size
= desired_matrix
->nrows
;
4880 nbytes
= runs_size
* sizeof *runs
;
4881 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4882 nbytes
= runs_size
* sizeof *run_pool
;
4883 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4886 nruns
= run_idx
= 0;
4889 /* Add rows from the current and desired matrix to the hash table
4890 row_hash_table to be able to find equal ones quickly. */
4892 for (i
= first_old
; i
< last_old
; ++i
)
4894 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4896 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4897 old_lines
[i
] = entry
;
4901 old_lines
[i
] = NULL
;
4904 for (i
= first_new
; i
< last_new
; ++i
)
4906 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4907 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4909 entry
->new_line_number
= i
;
4910 new_lines
[i
] = entry
;
4913 /* Identify moves based on lines that are unique and equal
4914 in both matrices. */
4915 for (i
= first_old
; i
< last_old
;)
4917 && old_lines
[i
]->old_uses
== 1
4918 && old_lines
[i
]->new_uses
== 1)
4921 int new_line
= old_lines
[i
]->new_line_number
;
4922 struct run
*run
= run_pool
+ run_idx
++;
4925 run
->current_vpos
= i
;
4926 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4927 run
->desired_vpos
= new_line
;
4928 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4930 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4932 /* Extend backward. */
4935 while (j
> first_old
4937 && old_lines
[j
] == new_lines
[k
])
4939 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4940 --run
->current_vpos
;
4941 --run
->desired_vpos
;
4944 run
->desired_y
-= h
;
4945 run
->current_y
-= h
;
4949 /* Extend forward. */
4954 && old_lines
[j
] == new_lines
[k
])
4956 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4962 /* Insert run into list of all runs. Order runs by copied
4963 pixel lines. Note that we record runs that don't have to
4964 be copied because they are already in place. This is done
4965 because we can avoid calling update_window_line in this
4967 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4969 for (k
= nruns
; k
> j
; --k
)
4970 runs
[k
] = runs
[k
- 1];
4979 /* Do the moves. Do it in a way that we don't overwrite something
4980 we want to copy later on. This is not solvable in general
4981 because there is only one display and we don't have a way to
4982 exchange areas on this display. Example:
4984 +-----------+ +-----------+
4986 +-----------+ --> +-----------+
4988 +-----------+ +-----------+
4990 Instead, prefer bigger moves, and invalidate moves that would
4991 copy from where we copied to. */
4993 for (i
= 0; i
< nruns
; ++i
)
4994 if (runs
[i
]->nrows
> 0)
4996 struct run
*r
= runs
[i
];
4998 /* Copy on the display. */
4999 if (r
->current_y
!= r
->desired_y
)
5001 rif
->scroll_run_hook (w
, r
);
5003 /* Invalidate runs that copy from where we copied to. */
5004 for (j
= i
+ 1; j
< nruns
; ++j
)
5006 struct run
*p
= runs
[j
];
5008 if ((p
->current_y
>= r
->desired_y
5009 && p
->current_y
< r
->desired_y
+ r
->height
)
5010 || (p
->current_y
+ p
->height
>= r
->desired_y
5011 && (p
->current_y
+ p
->height
5012 < r
->desired_y
+ r
->height
)))
5017 /* Assign matrix rows. */
5018 for (j
= 0; j
< r
->nrows
; ++j
)
5020 struct glyph_row
*from
, *to
;
5021 int to_overlapped_p
;
5023 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5024 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5025 to_overlapped_p
= to
->overlapped_p
;
5026 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5027 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5028 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
))
5029 from
->redraw_fringe_bitmaps_p
= 1;
5030 assign_row (to
, from
);
5031 to
->enabled_p
= 1, from
->enabled_p
= 0;
5032 to
->overlapped_p
= to_overlapped_p
;
5036 /* Clear the hash table, for the next time. */
5037 for (i
= 0; i
< row_entry_idx
; ++i
)
5038 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5040 /* Value is non-zero to indicate that we scrolled the display. */
5046 /************************************************************************
5048 ************************************************************************/
5050 /* Update the desired frame matrix of frame F.
5052 FORCE_P non-zero means that the update should not be stopped by
5053 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5054 should not be tried.
5056 Value is non-zero if update was stopped due to pending input. */
5059 update_frame_1 (f
, force_p
, inhibit_id_p
)
5064 /* Frame matrices to work on. */
5065 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5066 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5069 int preempt_count
= baud_rate
/ 2400 + 1;
5070 extern int input_pending
;
5072 xassert (current_matrix
&& desired_matrix
);
5074 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5075 calculate_costs (f
);
5077 if (preempt_count
<= 0)
5080 if (redisplay_dont_pause
)
5082 else if (!force_p
&& detect_input_pending ())
5088 /* If we cannot insert/delete lines, it's no use trying it. */
5089 if (!line_ins_del_ok
)
5092 /* See if any of the desired lines are enabled; don't compute for
5093 i/d line if just want cursor motion. */
5094 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5095 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5098 /* Try doing i/d line, if not yet inhibited. */
5099 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5100 force_p
|= scrolling (f
);
5102 /* Update the individual lines as needed. Do bottom line first. */
5103 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5104 update_frame_line (f
, desired_matrix
->nrows
- 1);
5106 /* Now update the rest of the lines. */
5107 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5109 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5111 if (FRAME_TERMCAP_P (f
))
5113 /* Flush out every so many lines.
5114 Also flush out if likely to have more than 1k buffered
5115 otherwise. I'm told that some telnet connections get
5116 really screwed by more than 1k output at once. */
5117 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5119 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5122 if (preempt_count
== 1)
5124 #ifdef EMACS_OUTQSIZE
5125 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5126 /* Probably not a tty. Ignore the error and reset
5128 outq
= PENDING_OUTPUT_COUNT (stdout
);
5131 if (baud_rate
<= outq
&& baud_rate
> 0)
5132 sleep (outq
/ baud_rate
);
5137 if ((i
- 1) % preempt_count
== 0)
5138 detect_input_pending ();
5140 update_frame_line (f
, i
);
5144 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5146 /* Now just clean up termcap drivers and set cursor, etc. */
5149 if ((cursor_in_echo_area
5150 /* If we are showing a message instead of the mini-buffer,
5151 show the cursor for the message instead of for the
5152 (now hidden) mini-buffer contents. */
5153 || (EQ (minibuf_window
, selected_window
)
5154 && EQ (minibuf_window
, echo_area_window
)
5155 && !NILP (echo_area_buffer
[0])))
5156 /* These cases apply only to the frame that contains
5157 the active mini-buffer window. */
5158 && FRAME_HAS_MINIBUF_P (f
)
5159 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5161 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5164 if (cursor_in_echo_area
< 0)
5166 /* Negative value of cursor_in_echo_area means put
5167 cursor at beginning of line. */
5173 /* Positive value of cursor_in_echo_area means put
5174 cursor at the end of the prompt. If the mini-buffer
5175 is several lines high, find the last line that has
5177 row
= FRAME_LINES (f
);
5183 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5185 /* Frame rows are filled up with spaces that
5186 must be ignored here. */
5187 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5189 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5190 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5193 && (last
- 1)->charpos
< 0)
5199 while (row
> top
&& col
== 0);
5201 /* Make sure COL is not out of range. */
5202 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5204 /* If we have another row, advance cursor into it. */
5205 if (row
< FRAME_LINES (f
) - 1)
5207 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5210 /* Otherwise move it back in range. */
5212 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5216 cursor_to (row
, col
);
5220 /* We have only one cursor on terminal frames. Use it to
5221 display the cursor of the selected window. */
5222 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5223 if (w
->cursor
.vpos
>= 0
5224 /* The cursor vpos may be temporarily out of bounds
5225 in the following situation: There is one window,
5226 with the cursor in the lower half of it. The window
5227 is split, and a message causes a redisplay before
5228 a new cursor position has been computed. */
5229 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5231 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5232 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5234 if (INTEGERP (w
->left_margin_cols
))
5235 x
+= XFASTINT (w
->left_margin_cols
);
5237 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5245 clear_desired_matrices (f
);
5250 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5254 struct frame
*frame
;
5256 int unchanged_at_top
, unchanged_at_bottom
;
5259 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5260 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5261 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5262 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5264 int free_at_end_vpos
= FRAME_LINES (frame
);
5265 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5266 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5268 if (!current_matrix
)
5271 /* Compute hash codes of all the lines. Also calculate number of
5272 changed lines, number of unchanged lines at the beginning, and
5273 number of unchanged lines at the end. */
5275 unchanged_at_top
= 0;
5276 unchanged_at_bottom
= FRAME_LINES (frame
);
5277 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5279 /* Give up on this scrolling if some old lines are not enabled. */
5280 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5282 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5283 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5285 /* This line cannot be redrawn, so don't let scrolling mess it. */
5286 new_hash
[i
] = old_hash
[i
];
5287 #define INFINITY 1000000 /* Taken from scroll.c */
5288 draw_cost
[i
] = INFINITY
;
5292 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5293 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5296 if (old_hash
[i
] != new_hash
[i
])
5299 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5301 else if (i
== unchanged_at_top
)
5303 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5306 /* If changed lines are few, don't allow preemption, don't scroll. */
5307 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5308 || unchanged_at_bottom
== FRAME_LINES (frame
))
5311 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5312 - unchanged_at_bottom
);
5314 if (scroll_region_ok
)
5315 free_at_end_vpos
-= unchanged_at_bottom
;
5316 else if (memory_below_frame
)
5317 free_at_end_vpos
= -1;
5319 /* If large window, fast terminal and few lines in common between
5320 current frame and desired frame, don't bother with i/d calc. */
5321 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5323 10 * scrolling_max_lines_saved (unchanged_at_top
,
5324 FRAME_LINES (frame
) - unchanged_at_bottom
,
5325 old_hash
, new_hash
, draw_cost
)))
5328 if (window_size
< 2)
5331 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5332 draw_cost
+ unchanged_at_top
- 1,
5333 old_draw_cost
+ unchanged_at_top
- 1,
5334 old_hash
+ unchanged_at_top
- 1,
5335 new_hash
+ unchanged_at_top
- 1,
5336 free_at_end_vpos
- unchanged_at_top
);
5342 /* Count the number of blanks at the start of the vector of glyphs R
5343 which is LEN glyphs long. */
5346 count_blanks (r
, len
)
5352 for (i
= 0; i
< len
; ++i
)
5353 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5360 /* Count the number of glyphs in common at the start of the glyph
5361 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5362 of STR2. Value is the number of equal glyphs equal at the start. */
5365 count_match (str1
, end1
, str2
, end2
)
5366 struct glyph
*str1
, *end1
, *str2
, *end2
;
5368 struct glyph
*p1
= str1
;
5369 struct glyph
*p2
= str2
;
5373 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5380 /* Char insertion/deletion cost vector, from term.c */
5382 extern int *char_ins_del_vector
;
5383 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5386 /* Perform a frame-based update on line VPOS in frame FRAME. */
5389 update_frame_line (f
, vpos
)
5393 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5395 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5396 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5397 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5398 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5399 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5400 int must_write_whole_line_p
;
5401 int write_spaces_p
= must_write_spaces
;
5402 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5403 != FACE_TTY_DEFAULT_BG_COLOR
);
5405 if (colored_spaces_p
)
5408 /* Current row not enabled means it has unknown contents. We must
5409 write the whole desired line in that case. */
5410 must_write_whole_line_p
= !current_row
->enabled_p
;
5411 if (must_write_whole_line_p
)
5418 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5419 olen
= current_row
->used
[TEXT_AREA
];
5421 /* Ignore trailing spaces, if we can. */
5422 if (!write_spaces_p
)
5423 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5427 current_row
->enabled_p
= 1;
5428 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5430 /* If desired line is empty, just clear the line. */
5431 if (!desired_row
->enabled_p
)
5437 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5438 nlen
= desired_row
->used
[TEXT_AREA
];
5439 nend
= nbody
+ nlen
;
5441 /* If display line has unknown contents, write the whole line. */
5442 if (must_write_whole_line_p
)
5444 /* Ignore spaces at the end, if we can. */
5445 if (!write_spaces_p
)
5446 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5449 /* Write the contents of the desired line. */
5452 cursor_to (vpos
, 0);
5453 write_glyphs (nbody
, nlen
);
5456 /* Don't call clear_end_of_line if we already wrote the whole
5457 line. The cursor will not be at the right margin in that
5458 case but in the line below. */
5459 if (nlen
< FRAME_TOTAL_COLS (f
))
5461 cursor_to (vpos
, nlen
);
5462 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5465 /* Make sure we are in the right row, otherwise cursor movement
5466 with cmgoto might use `ch' in the wrong row. */
5467 cursor_to (vpos
, 0);
5469 make_current (desired_matrix
, current_matrix
, vpos
);
5473 /* Pretend trailing spaces are not there at all,
5474 unless for one reason or another we must write all spaces. */
5475 if (!write_spaces_p
)
5476 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5479 /* If there's no i/d char, quickly do the best we can without it. */
5480 if (!char_ins_del_ok
)
5484 /* Find the first glyph in desired row that doesn't agree with
5485 a glyph in the current row, and write the rest from there on. */
5486 for (i
= 0; i
< nlen
; i
++)
5488 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5490 /* Find the end of the run of different glyphs. */
5494 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5495 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5498 /* Output this run of non-matching chars. */
5499 cursor_to (vpos
, i
);
5500 write_glyphs (nbody
+ i
, j
- i
);
5503 /* Now find the next non-match. */
5507 /* Clear the rest of the line, or the non-clear part of it. */
5510 cursor_to (vpos
, nlen
);
5511 clear_end_of_line (olen
);
5514 /* Make current row = desired row. */
5515 make_current (desired_matrix
, current_matrix
, vpos
);
5519 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5520 characters in a row. */
5524 /* If current line is blank, skip over initial spaces, if
5525 possible, and write the rest. */
5529 nsp
= count_blanks (nbody
, nlen
);
5533 cursor_to (vpos
, nsp
);
5534 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5537 /* Exchange contents between current_frame and new_frame. */
5538 make_current (desired_matrix
, current_matrix
, vpos
);
5542 /* Compute number of leading blanks in old and new contents. */
5543 osp
= count_blanks (obody
, olen
);
5544 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5546 /* Compute number of matching chars starting with first non-blank. */
5547 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5548 nbody
+ nsp
, nbody
+ nlen
);
5550 /* Spaces in new match implicit space past the end of old. */
5551 /* A bug causing this to be a no-op was fixed in 18.29. */
5552 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5555 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5559 /* Avoid doing insert/delete char
5560 just cause number of leading spaces differs
5561 when the following text does not match. */
5562 if (begmatch
== 0 && osp
!= nsp
)
5563 osp
= nsp
= min (osp
, nsp
);
5565 /* Find matching characters at end of line */
5568 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5570 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5575 endmatch
= obody
+ olen
- op1
;
5577 /* tem gets the distance to insert or delete.
5578 endmatch is how many characters we save by doing so.
5581 tem
= (nlen
- nsp
) - (olen
- osp
);
5583 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5586 /* nsp - osp is the distance to insert or delete.
5587 If that is nonzero, begmatch is known to be nonzero also.
5588 begmatch + endmatch is how much we save by doing the ins/del.
5592 && (!char_ins_del_ok
5593 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5597 osp
= nsp
= min (osp
, nsp
);
5600 /* Now go through the line, inserting, writing and
5601 deleting as appropriate. */
5605 cursor_to (vpos
, nsp
);
5606 delete_glyphs (osp
- nsp
);
5610 /* If going to delete chars later in line
5611 and insert earlier in the line,
5612 must delete first to avoid losing data in the insert */
5613 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5615 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5616 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5617 olen
= nlen
- (nsp
- osp
);
5619 cursor_to (vpos
, osp
);
5620 insert_glyphs (0, nsp
- osp
);
5624 tem
= nsp
+ begmatch
+ endmatch
;
5625 if (nlen
!= tem
|| olen
!= tem
)
5627 if (!endmatch
|| nlen
== olen
)
5629 /* If new text being written reaches right margin, there is
5630 no need to do clear-to-eol at the end of this function
5631 (and it would not be safe, since cursor is not going to
5632 be "at the margin" after the text is done). */
5633 if (nlen
== FRAME_TOTAL_COLS (f
))
5636 /* Function write_glyphs is prepared to do nothing
5637 if passed a length <= 0. Check it here to avoid
5638 unnecessary cursor movement. */
5641 cursor_to (vpos
, nsp
+ begmatch
);
5642 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5645 else if (nlen
> olen
)
5647 /* Here, we used to have the following simple code:
5648 ----------------------------------------
5649 write_glyphs (nbody + nsp + begmatch, olen - tem);
5650 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5651 ----------------------------------------
5652 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5653 is a padding glyph. */
5654 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5657 cursor_to (vpos
, nsp
+ begmatch
);
5659 /* Calculate columns we can actually overwrite. */
5660 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5662 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5664 /* If we left columns to be overwritten, we must delete them. */
5665 del
= olen
- tem
- out
;
5667 delete_glyphs (del
);
5669 /* At last, we insert columns not yet written out. */
5670 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5673 else if (olen
> nlen
)
5675 cursor_to (vpos
, nsp
+ begmatch
);
5676 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5677 delete_glyphs (olen
- nlen
);
5683 /* If any unerased characters remain after the new line, erase them. */
5686 cursor_to (vpos
, nlen
);
5687 clear_end_of_line (olen
);
5690 /* Exchange contents between current_frame and new_frame. */
5691 make_current (desired_matrix
, current_matrix
, vpos
);
5696 /***********************************************************************
5697 X/Y Position -> Buffer Position
5698 ***********************************************************************/
5700 /* Determine what's under window-relative pixel position (*X, *Y).
5701 Return the object (string or buffer) that's there.
5702 Return in *POS the position in that object.
5703 Adjust *X and *Y to character positions. */
5706 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5709 struct display_pos
*pos
;
5710 Lisp_Object
*object
;
5712 int *width
, *height
;
5715 struct buffer
*old_current_buffer
= current_buffer
;
5716 struct text_pos startp
;
5718 struct glyph_row
*row
;
5721 current_buffer
= XBUFFER (w
->buffer
);
5722 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5723 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5724 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5725 start_display (&it
, w
, startp
);
5727 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5728 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5729 MOVE_TO_X
| MOVE_TO_Y
);
5731 current_buffer
= old_current_buffer
;
5733 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5734 *dy
= *y
- it
.current_y
;
5737 if (STRINGP (it
.string
))
5741 #ifdef HAVE_WINDOW_SYSTEM
5742 if (it
.what
== IT_IMAGE
)
5745 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5746 && !NILP (img
->spec
))
5747 *object
= img
->spec
;
5751 row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5754 if (it
.hpos
< row
->used
[TEXT_AREA
])
5756 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5757 *width
= glyph
->pixel_width
;
5758 *height
= glyph
->ascent
+ glyph
->descent
;
5759 #ifdef HAVE_WINDOW_SYSTEM
5760 if (glyph
->type
== IMAGE_GLYPH
)
5761 *dy
-= row
->ascent
- glyph
->ascent
;
5767 *height
= row
->height
;
5772 *width
= *height
= 0;
5775 /* Add extra (default width) columns if clicked after EOL. */
5776 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5778 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5787 /* Value is the string under window-relative coordinates X/Y in the
5788 mode line or header line (PART says which) of window W, or nil if none.
5789 *CHARPOS is set to the position in the string returned. */
5792 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5794 enum window_part part
;
5797 Lisp_Object
*object
;
5799 int *width
, *height
;
5801 struct glyph_row
*row
;
5802 struct glyph
*glyph
, *end
;
5804 Lisp_Object string
= Qnil
;
5806 if (part
== ON_MODE_LINE
)
5807 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5809 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5811 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5813 if (row
->mode_line_p
&& row
->enabled_p
)
5815 /* Find the glyph under X. If we find one with a string object,
5816 it's the one we were looking for. */
5817 glyph
= row
->glyphs
[TEXT_AREA
];
5818 end
= glyph
+ row
->used
[TEXT_AREA
];
5819 for (x0
= *x
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5820 x0
-= glyph
->pixel_width
;
5821 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5824 string
= glyph
->object
;
5825 *charpos
= glyph
->charpos
;
5826 *width
= glyph
->pixel_width
;
5827 *height
= glyph
->ascent
+ glyph
->descent
;
5828 #ifdef HAVE_WINDOW_SYSTEM
5829 if (glyph
->type
== IMAGE_GLYPH
)
5832 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5834 *object
= img
->spec
;
5835 y0
-= row
->ascent
- glyph
->ascent
;
5841 /* Add extra (default width) columns if clicked after EOL. */
5842 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5844 *height
= row
->height
;
5851 *width
= *height
= 0;
5861 /* Value is the string under window-relative coordinates X/Y in either
5862 marginal area, or nil if none. *CHARPOS is set to the position in
5863 the string returned. */
5866 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5868 enum window_part part
;
5871 Lisp_Object
*object
;
5873 int *width
, *height
;
5875 struct glyph_row
*row
= w
->current_matrix
->rows
;
5876 struct glyph
*glyph
, *end
;
5877 int x0
, y0
, i
, wy
= *y
;
5879 Lisp_Object string
= Qnil
;
5881 if (part
== ON_LEFT_MARGIN
)
5882 area
= LEFT_MARGIN_AREA
;
5883 else if (part
== ON_RIGHT_MARGIN
)
5884 area
= RIGHT_MARGIN_AREA
;
5888 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5889 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5892 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5896 /* Find the glyph under X. If we find one with a string object,
5897 it's the one we were looking for. */
5898 if (area
== RIGHT_MARGIN_AREA
)
5899 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5900 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5901 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5902 + window_box_width (w
, LEFT_MARGIN_AREA
)
5903 + window_box_width (w
, TEXT_AREA
));
5905 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5906 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5909 glyph
= row
->glyphs
[area
];
5910 end
= glyph
+ row
->used
[area
];
5911 for (x0
= *x
- x0
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5912 x0
-= glyph
->pixel_width
;
5913 *x
= glyph
- row
->glyphs
[area
];
5916 string
= glyph
->object
;
5917 *charpos
= glyph
->charpos
;
5918 *width
= glyph
->pixel_width
;
5919 *height
= glyph
->ascent
+ glyph
->descent
;
5920 #ifdef HAVE_WINDOW_SYSTEM
5921 if (glyph
->type
== IMAGE_GLYPH
)
5924 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5926 *object
= img
->spec
;
5927 y0
-= row
->ascent
- glyph
->ascent
;
5933 /* Add extra (default width) columns if clicked after EOL. */
5934 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5936 *height
= row
->height
;
5943 *width
= *height
= 0;
5953 /***********************************************************************
5954 Changing Frame Sizes
5955 ***********************************************************************/
5960 window_change_signal (signalnum
) /* If we don't have an argument, */
5961 int signalnum
; /* some compilers complain in signal calls. */
5967 int old_errno
= errno
;
5969 get_frame_size (&width
, &height
);
5971 /* The frame size change obviously applies to a termcap-controlled
5972 frame. Find such a frame in the list, and assume it's the only
5973 one (since the redisplay code always writes to stdout, not a
5974 FILE * specified in the frame structure). Record the new size,
5975 but don't reallocate the data structures now. Let that be done
5976 later outside of the signal handler. */
5979 Lisp_Object tail
, frame
;
5981 FOR_EACH_FRAME (tail
, frame
)
5983 if (FRAME_TERMCAP_P (XFRAME (frame
)))
5985 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5991 signal (SIGWINCH
, window_change_signal
);
5994 #endif /* SIGWINCH */
5997 /* Do any change in frame size that was requested by a signal. SAFE
5998 non-zero means this function is called from a place where it is
5999 safe to change frame sizes while a redisplay is in progress. */
6002 do_pending_window_change (safe
)
6005 /* If window_change_signal should have run before, run it now. */
6006 if (redisplaying_p
&& !safe
)
6009 while (delayed_size_change
)
6011 Lisp_Object tail
, frame
;
6013 delayed_size_change
= 0;
6015 FOR_EACH_FRAME (tail
, frame
)
6017 struct frame
*f
= XFRAME (frame
);
6019 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6020 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6027 /* Change the frame height and/or width. Values may be given as zero to
6028 indicate no change is to take place.
6030 If DELAY is non-zero, then assume we're being called from a signal
6031 handler, and queue the change for later - perhaps the next
6032 redisplay. Since this tries to resize windows, we can't call it
6033 from a signal handler.
6035 SAFE non-zero means this function is called from a place where it's
6036 safe to change frame sizes while a redisplay is in progress. */
6039 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6040 register struct frame
*f
;
6041 int newheight
, newwidth
, pretend
, delay
, safe
;
6043 Lisp_Object tail
, frame
;
6045 if (! FRAME_WINDOW_P (f
))
6047 /* When using termcap, or on MS-DOS, all frames use
6048 the same screen, so a change in size affects all frames. */
6049 FOR_EACH_FRAME (tail
, frame
)
6050 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6051 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6052 pretend
, delay
, safe
);
6055 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6059 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6060 register struct frame
*f
;
6061 int newheight
, newwidth
, pretend
, delay
, safe
;
6063 int new_frame_total_cols
;
6064 int count
= SPECPDL_INDEX ();
6066 /* If we can't deal with the change now, queue it for later. */
6067 if (delay
|| (redisplaying_p
&& !safe
))
6069 f
->new_text_lines
= newheight
;
6070 f
->new_text_cols
= newwidth
;
6071 delayed_size_change
= 1;
6075 /* This size-change overrides any pending one for this frame. */
6076 f
->new_text_lines
= 0;
6077 f
->new_text_cols
= 0;
6079 /* If an argument is zero, set it to the current value. */
6081 newheight
= FRAME_LINES (f
);
6083 newwidth
= FRAME_COLS (f
);
6085 /* Compute width of windows in F.
6086 This is the width of the frame without vertical scroll bars. */
6087 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6089 /* Round up to the smallest acceptable size. */
6090 check_frame_size (f
, &newheight
, &newwidth
);
6092 /* If we're not changing the frame size, quit now. */
6093 if (newheight
== FRAME_LINES (f
)
6094 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6100 /* We only can set screen dimensions to certain values supported
6101 by our video hardware. Try to find the smallest size greater
6102 or equal to the requested dimensions. */
6103 dos_set_window_size (&newheight
, &newwidth
);
6106 if (newheight
!= FRAME_LINES (f
))
6108 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6110 /* Frame has both root and mini-buffer. */
6111 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6112 FRAME_TOP_MARGIN (f
));
6113 set_window_height (FRAME_ROOT_WINDOW (f
),
6116 - FRAME_TOP_MARGIN (f
)),
6118 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6120 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6123 /* Frame has just one top-level window. */
6124 set_window_height (FRAME_ROOT_WINDOW (f
),
6125 newheight
- FRAME_TOP_MARGIN (f
), 0);
6127 if (FRAME_TERMCAP_P (f
) && !pretend
)
6128 FrameRows
= newheight
;
6131 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6133 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6134 if (FRAME_HAS_MINIBUF_P (f
))
6135 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6137 if (FRAME_TERMCAP_P (f
) && !pretend
)
6138 FrameCols
= newwidth
;
6140 if (WINDOWP (f
->tool_bar_window
))
6141 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6144 FRAME_LINES (f
) = newheight
;
6145 SET_FRAME_COLS (f
, newwidth
);
6148 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6149 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6151 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6153 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6154 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6155 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6156 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6160 calculate_costs (f
);
6161 SET_FRAME_GARBAGED (f
);
6166 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6168 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6169 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6170 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6172 unbind_to (count
, Qnil
);
6177 /***********************************************************************
6178 Terminal Related Lisp Functions
6179 ***********************************************************************/
6181 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6182 1, 1, "FOpen termscript file: ",
6183 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6184 FILE = nil means just close any termscript file currently open. */)
6188 if (termscript
!= 0) fclose (termscript
);
6193 file
= Fexpand_file_name (file
, Qnil
);
6194 termscript
= fopen (SDATA (file
), "w");
6195 if (termscript
== 0)
6196 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6202 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6203 Ssend_string_to_terminal
, 1, 1, 0,
6204 doc
: /* Send STRING to the terminal without alteration.
6205 Control characters in STRING will have terminal-dependent effects. */)
6209 /* ??? Perhaps we should do something special for multibyte strings here. */
6210 CHECK_STRING (string
);
6211 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6215 fwrite (SDATA (string
), 1, SBYTES (string
),
6217 fflush (termscript
);
6223 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6224 doc
: /* Beep, or flash the screen.
6225 Also, unless an argument is given,
6226 terminate any keyboard macro currently executing. */)
6249 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6250 error ("Keyboard macro terminated by a command ringing the bell");
6258 /***********************************************************************
6260 ***********************************************************************/
6262 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6263 doc
: /* Pause, without updating display, for SECONDS seconds.
6264 SECONDS may be a floating-point value, meaning that you can wait for a
6265 fraction of a second. Optional second arg MILLISECONDS specifies an
6266 additional wait period, in milliseconds; this may be useful if your
6267 Emacs was built without floating point support.
6268 \(Not all operating systems support waiting for a fraction of a second.) */)
6269 (seconds
, milliseconds
)
6270 Lisp_Object seconds
, milliseconds
;
6274 if (NILP (milliseconds
))
6275 XSETINT (milliseconds
, 0);
6277 CHECK_NUMBER (milliseconds
);
6278 usec
= XINT (milliseconds
) * 1000;
6281 double duration
= extract_float (seconds
);
6282 sec
= (int) duration
;
6283 usec
+= (duration
- sec
) * 1000000;
6286 #ifndef EMACS_HAS_USECS
6287 if (sec
== 0 && usec
!= 0)
6288 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6291 /* Assure that 0 <= usec < 1000000. */
6294 /* We can't rely on the rounding being correct if usec is negative. */
6295 if (-1000000 < usec
)
6296 sec
--, usec
+= 1000000;
6298 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6301 sec
+= usec
/ 1000000, usec
%= 1000000;
6303 if (sec
< 0 || (sec
== 0 && usec
== 0))
6309 XSETFASTINT (zero
, 0);
6310 wait_reading_process_input (sec
, usec
, zero
, 0);
6313 /* We should always have wait_reading_process_input; we have a dummy
6314 implementation for systems which don't support subprocesses. */
6316 /* No wait_reading_process_input */
6323 /* The reason this is done this way
6324 (rather than defined (H_S) && defined (H_T))
6325 is because the VMS preprocessor doesn't grok `defined'. */
6327 EMACS_GET_TIME (end_time
);
6328 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6329 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6333 EMACS_GET_TIME (timeout
);
6334 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6335 if (EMACS_TIME_NEG_P (timeout
)
6336 || !select (1, 0, 0, 0, &timeout
))
6339 #else /* not HAVE_SELECT */
6341 #endif /* HAVE_SELECT */
6342 #endif /* not VMS */
6345 #endif /* no subprocesses */
6351 /* This is just like wait_reading_process_input, except that
6352 it does the redisplay.
6354 It's also much like Fsit_for, except that it can be used for
6355 waiting for input as well. */
6358 sit_for (sec
, usec
, reading
, display
, initial_display
)
6359 int sec
, usec
, reading
, display
, initial_display
;
6361 Lisp_Object read_kbd
;
6363 swallow_events (display
);
6365 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6368 if (initial_display
)
6369 redisplay_preserve_echo_area (2);
6371 if (sec
== 0 && usec
== 0)
6378 XSETINT (read_kbd
, reading
? -1 : 1);
6379 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6381 return detect_input_pending () ? Qnil
: Qt
;
6385 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6386 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6387 SECONDS may be a floating-point value, meaning that you can wait for a
6388 fraction of a second.
6389 \(Not all operating systems support waiting for a fraction of a second.)
6390 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6391 Redisplay is preempted as always if input arrives, and does not happen
6392 if input is available before it starts.
6393 Value is t if waited the full time with no input arriving.
6395 An obsolete but still supported form is
6396 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6397 Where the optional arg MILLISECONDS specifies an additional wait period,
6398 in milliseconds; this was useful when Emacs was built without
6399 floating point support.
6400 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6402 /* The `old-nodisp' stuff is there so that the arglist has the correct
6403 length. Otherwise, `defdvice' will redefine it with fewer args. */
6404 (seconds
, milliseconds
, nodisp
)
6405 Lisp_Object seconds
, milliseconds
, nodisp
;
6409 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6411 nodisp
= milliseconds
;
6412 milliseconds
= Qnil
;
6415 if (NILP (milliseconds
))
6416 XSETINT (milliseconds
, 0);
6418 CHECK_NUMBER (milliseconds
);
6419 usec
= XINT (milliseconds
) * 1000;
6422 double duration
= extract_float (seconds
);
6423 sec
= (int) duration
;
6424 usec
+= (duration
- sec
) * 1000000;
6427 #ifndef EMACS_HAS_USECS
6428 if (usec
!= 0 && sec
== 0)
6429 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6432 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6437 /***********************************************************************
6438 Other Lisp Functions
6439 ***********************************************************************/
6441 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6442 session's frames, frame names, buffers, buffer-read-only flags, and
6443 buffer-modified-flags, and a trailing sentinel (so we don't need to
6444 add length checks). */
6446 static Lisp_Object frame_and_buffer_state
;
6449 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6450 Sframe_or_buffer_changed_p
, 0, 0, 0,
6451 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6452 The state variable is an internal vector containing all frames and buffers,
6453 aside from buffers whose names start with space,
6454 along with the buffers' read-only and modified flags, which allows a fast
6455 check to see whether the menu bars might need to be recomputed.
6456 If this function returns non-nil, it updates the internal vector to reflect
6457 the current state. */)
6460 Lisp_Object tail
, frame
, buf
;
6464 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6465 FOR_EACH_FRAME (tail
, frame
)
6467 if (!EQ (*vecp
++, frame
))
6469 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6472 /* Check that the buffer info matches.
6473 No need to test for the end of the vector
6474 because the last element of the vector is lambda
6475 and that will always cause a mismatch. */
6476 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6478 buf
= XCDR (XCAR (tail
));
6479 /* Ignore buffers that aren't included in buffer lists. */
6480 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6482 if (!EQ (*vecp
++, buf
))
6484 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6486 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6489 /* Detect deletion of a buffer at the end of the list. */
6490 if (EQ (*vecp
, Qlambda
))
6493 /* Start with 1 so there is room for at least one lambda at the end. */
6495 FOR_EACH_FRAME (tail
, frame
)
6497 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6499 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6500 if (n
> XVECTOR (frame_and_buffer_state
)->size
6501 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6502 /* Add 20 extra so we grow it less often. */
6503 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6504 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6505 FOR_EACH_FRAME (tail
, frame
)
6508 *vecp
++ = XFRAME (frame
)->name
;
6510 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6512 buf
= XCDR (XCAR (tail
));
6513 /* Ignore buffers that aren't included in buffer lists. */
6514 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6517 *vecp
++ = XBUFFER (buf
)->read_only
;
6518 *vecp
++ = Fbuffer_modified_p (buf
);
6520 /* Fill up the vector with lambdas (always at least one). */
6522 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6523 < XVECTOR (frame_and_buffer_state
)->size
)
6525 /* Make sure we didn't overflow the vector. */
6526 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6527 > XVECTOR (frame_and_buffer_state
)->size
)
6534 /***********************************************************************
6536 ***********************************************************************/
6538 char *terminal_type
;
6540 /* Initialization done when Emacs fork is started, before doing stty.
6541 Determine terminal type and set terminal_driver. Then invoke its
6542 decoding routine to set up variables in the terminal package. */
6547 #ifdef HAVE_X_WINDOWS
6548 extern int display_arg
;
6551 /* Construct the space glyph. */
6552 space_glyph
.type
= CHAR_GLYPH
;
6553 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6554 space_glyph
.charpos
= -1;
6558 cursor_in_echo_area
= 0;
6559 terminal_type
= (char *) 0;
6561 /* Now is the time to initialize this; it's used by init_sys_modes
6563 Vwindow_system
= Qnil
;
6565 /* If the user wants to use a window system, we shouldn't bother
6566 initializing the terminal. This is especially important when the
6567 terminal is so dumb that emacs gives up before and doesn't bother
6568 using the window system.
6570 If the DISPLAY environment variable is set and nonempty,
6571 try to use X, and die with an error message if that doesn't work. */
6573 #ifdef HAVE_X_WINDOWS
6578 display
= getenv ("DECW$DISPLAY");
6580 display
= getenv ("DISPLAY");
6583 display_arg
= (display
!= 0 && *display
!= 0);
6586 if (!inhibit_window_system
&& display_arg
6592 Vwindow_system
= intern ("x");
6594 Vwindow_system_version
= make_number (11);
6596 Vwindow_system_version
= make_number (10);
6598 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6599 /* In some versions of ncurses,
6600 tputs crashes if we have not called tgetent.
6602 { char b
[2044]; tgetent (b
, "xterm");}
6604 adjust_frame_glyphs_initially ();
6607 #endif /* HAVE_X_WINDOWS */
6610 if (!inhibit_window_system
)
6612 Vwindow_system
= intern ("w32");
6613 Vwindow_system_version
= make_number (1);
6614 adjust_frame_glyphs_initially ();
6617 #endif /* HAVE_NTGUI */
6620 if (!inhibit_window_system
)
6622 Vwindow_system
= intern ("mac");
6623 Vwindow_system_version
= make_number (1);
6624 adjust_frame_glyphs_initially ();
6629 /* If no window system has been specified, try to use the terminal. */
6632 fatal ("standard input is not a tty");
6636 /* Look at the TERM variable. */
6637 terminal_type
= (char *) getenv ("TERM");
6641 fprintf (stderr
, "Please specify your terminal type.\n\
6642 For types defined in VMS, use set term /device=TYPE.\n\
6643 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6644 \(The quotation marks are necessary since terminal types are lower case.)\n");
6646 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6652 /* VMS DCL tends to up-case things, so down-case term type.
6653 Hardly any uppercase letters in terminal types; should be none. */
6655 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6658 strcpy (new, terminal_type
);
6660 for (p
= new; *p
; p
++)
6664 terminal_type
= new;
6668 term_init (terminal_type
);
6671 struct frame
*sf
= SELECTED_FRAME ();
6672 int width
= FRAME_TOTAL_COLS (sf
);
6673 int height
= FRAME_LINES (sf
);
6675 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6677 /* If these sizes are so big they cause overflow, just ignore the
6678 change. It's not clear what better we could do. */
6679 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6680 fatal ("screen size %dx%d too big", width
, height
);
6683 adjust_frame_glyphs_initially ();
6684 calculate_costs (XFRAME (selected_frame
));
6689 #endif /* CANNOT_DUMP */
6690 signal (SIGWINCH
, window_change_signal
);
6691 #endif /* SIGWINCH */
6693 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6697 /* The MSDOS terminal turns on its ``window system'' relatively
6698 late into the startup, so we cannot do the frame faces'
6699 initialization just yet. It will be done later by pc-win.el
6700 and internal_terminal_init. */
6701 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6703 && NILP (Vwindow_system
))
6705 /* For the initial frame, we don't have any way of knowing what
6706 are the foreground and background colors of the terminal. */
6707 struct frame
*sf
= SELECTED_FRAME();
6709 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6710 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6711 call0 (intern ("tty-set-up-initial-frame-faces"));
6717 /***********************************************************************
6719 ***********************************************************************/
6721 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6722 Sinternal_show_cursor
, 2, 2, 0,
6723 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6724 WINDOW nil means use the selected window. SHOW non-nil means
6725 show a cursor in WINDOW in the next redisplay. SHOW nil means
6726 don't show a cursor. */)
6728 Lisp_Object window
, show
;
6730 /* Don't change cursor state while redisplaying. This could confuse
6732 if (!redisplaying_p
)
6735 window
= selected_window
;
6737 CHECK_WINDOW (window
);
6739 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6746 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6747 Sinternal_show_cursor_p
, 0, 1, 0,
6748 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6749 WINDOW nil or omitted means report on the selected window. */)
6756 window
= selected_window
;
6758 CHECK_WINDOW (window
);
6760 w
= XWINDOW (window
);
6761 return w
->cursor_off_p
? Qnil
: Qt
;
6765 /***********************************************************************
6767 ***********************************************************************/
6772 defsubr (&Sredraw_frame
);
6773 defsubr (&Sredraw_display
);
6774 defsubr (&Sframe_or_buffer_changed_p
);
6775 defsubr (&Sopen_termscript
);
6777 defsubr (&Ssit_for
);
6778 defsubr (&Ssleep_for
);
6779 defsubr (&Ssend_string_to_terminal
);
6780 defsubr (&Sinternal_show_cursor
);
6781 defsubr (&Sinternal_show_cursor_p
);
6784 defsubr (&Sdump_redisplay_history
);
6787 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6788 staticpro (&frame_and_buffer_state
);
6790 Qdisplay_table
= intern ("display-table");
6791 staticpro (&Qdisplay_table
);
6792 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6793 staticpro (&Qredisplay_dont_pause
);
6795 DEFVAR_INT ("baud-rate", &baud_rate
,
6796 doc
: /* *The output baud rate of the terminal.
6797 On most systems, changing this value will affect the amount of padding
6798 and the other strategic decisions made during redisplay. */);
6800 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6801 doc
: /* *Non-nil means invert the entire frame display.
6802 This means everything is in inverse video which otherwise would not be. */);
6804 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6805 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6807 See also `ring-bell-function'. */);
6809 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6810 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6811 A non-nil value is useful if the terminal can automatically preserve
6812 Emacs's frame display when you reenter Emacs.
6813 It is up to you to set this variable if your terminal can do that. */);
6815 DEFVAR_LISP ("window-system", &Vwindow_system
,
6816 doc
: /* Name of window system that Emacs is displaying through.
6817 The value is a symbol--for instance, `x' for X windows.
6818 The value is nil if Emacs is using a text-only terminal. */);
6820 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6821 doc
: /* The version number of the window system in use.
6822 For X windows, this is 10 or 11. */);
6824 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6825 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6827 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6828 doc
: /* Table defining how to output a glyph code to the frame.
6829 If not nil, this is a vector indexed by glyph code to define the glyph.
6830 Each element can be:
6831 integer: a glyph code which this glyph is an alias for.
6832 string: output this glyph using that string (not impl. in X windows).
6833 nil: this glyph mod 524288 is the code of a character to output,
6834 and this glyph / 524288 is the face number (see `face-id') to use
6835 while outputting it. */);
6836 Vglyph_table
= Qnil
;
6838 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6839 doc
: /* Display table to use for buffers that specify none.
6840 See `buffer-display-table' for more information. */);
6841 Vstandard_display_table
= Qnil
;
6843 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6844 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6845 redisplay_dont_pause
= 0;
6847 /* Initialize `window-system', unless init_display already decided it. */
6852 Vwindow_system
= Qnil
;
6853 Vwindow_system_version
= Qnil
;
6857 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6858 (do not change this comment) */